COMPOSITIONS FOR TREATING PERIODONTITIS AND DENTAL CALCULUS ACCUMULATION
Compositions comprising serine and an organic mono- or multi-phosphate salt and methods of using such compositions to treat and/or prevent periodontal disease and/or dental calculus are provided.
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This application is a continuation of U.S. application Ser. No. 15/587,265, filed May 4, 2017 which claims the benefit of U.S. Provisional Application No. 62/332,201 filed May 5, 2016, the contents of which are incorporated herewith.
TECHNICAL FIELDThis disclosure relates to compositions comprising serine and an organic mono- or multi-phosphate salt (e.g., a phytate) for the treatment and/or prevention of periodontitis (e.g., gingivitis) and/or dental calculus formation or development.
BACKGROUND OF THE INVENTIONThe human oral cavity contains one of the most densely populated and complex mixed microbial floras that inhabit the human body (Takhashi, N., 2005). One major component of the oral mixed microbial flora is comprised of fermentable carbohydrate metabolizing types of microorganisms that are found particularly in supra-gingival dental sites, namely tooth pits, fissures, and interproximal tooth embrasures. Fermentable dietary carbohydrates and corresponding fermentative oral bacteria are easily and regularly retained in many of these intra-oral locations, sheltered from saliva and readily able to interact to produce abundant acidity and an acidic pH. Such acidity is principally due to the generation of lactic acid, an entity that can readily solubilize tooth calcium phosphate, the dominant mineral element comprising the mineralized tissues (i.e., enamel, dentin, and cementum) of human teeth.
In contrast to acidity, if the environment of the teeth gingivae is alkaline (e.g., because of elevated urea levels that occur in many individuals' gingival crevicular fluid), alkaline conditions may be expected to prevail around the necks of the teeth to where, instead of dental caries, dental calculus and/or periodontitis indices are more evident.
The dental calculus/periodontitis entity involves a mixed microbial flora that mainly populates the regions around the necks of the teeth and extends into adjacent gingival and subgingival dentition sites. The bacteria involved in these locations are mainly non-fermenting. They have been proven to be largely comprised of proteolytic, putrefactive microorganisms that readily metabolize nitrogenous substrates, particularly such derived from the gingivae and adjacent gingival crevicular and periodontal pocket fluids and tissues (Takhashi, N., 2005). Of particular note is that this includes involvement with urea and amino acids, the main end-products of the numerous, common human body amino acids that circulate in the blood vessels throughout the human body. These amino acids and ammonia related thereto are degraded by enzymes in bacteria readily found in gingival crevicular fluid (Golub, L. M., Borden, S. M., and Kleinberg, I., 1971; Onosi, M., Tachibana, Y., Nakamura, T., Takakuwa, S., and Ishioka, K., 1957; Singer, D. L. and Kleinberg, I., 1978).
Upon microbial degradation, gingival and periodontal crevices containing urea are conducive to bacterial degradation to ammonia and can exhibit a high alkaline pH. Such a high pH is an essential element responsible for the easy formation of calcium phosphate deposits (generally referred to as dental plaque or calculus), which readily form around the base of the crowns of teeth (Denepitiya L. and Kleinberg I., 1982; Arch. Oral Biol.; Salako, N. O. and Kleinberg, I., 1989; Jin, Y. and Yip, H.-K., 2002). Left untreated, these crevices promote the proliferation of additional ureolytic and proteolytic bacteria, which in turn promote the formation of additional calculus. Ultimately, this can cause the development of periodontal disease (e.g., gingivitis) (Jacobson, M. and Kesel, R. G., 1950). Central to these processes are the formation and flow of gingival/periodontal crevicular fluid (Golub, L. M., Borden, S. M., and Kleinberg, I., 1971), which characterizes and helps perpetuate these periodontal disease conditions by maintaining a high pH in the environment.
We have previously shown that amino acids can serve as important bacterial substrates and can thereby help facilitate both the accumulation of dental plaque and the development of periodontal disease (including gingivitis, with symptoms including bleeding gums and putrefactive gingivae). For example, urea has been demonstrated to promote tooth and gingival alkalinity, enhancing the accumulation of plaque-causing bacteria on teeth and other surfaces in the oral cavity (Kleinberg, I., 1967, Arch. Oral Biol., 1475-1484). Numerous other amino acids can serve as nitrogenous substrates that contribute to varying degrees of alkalinity and promote periodontal disease, albeit to a lesser degree than urea (Biswas, S. D. and Kleinberg, I., 1971; Golub, L. M., Borden, S. M., and Kleinberg, I., 1971; Kleinberg, I. and Hall, G., 1968). In general, amino acids function to maintain a balance of alkalinity in the oral cavity.
SUMMARYThe present disclosure relates generally to compositions comprising serine and an organic mono- or multi-phosphate salt (e.g., a phytate) which can treat and/or prevent periodontal disease (e.g., gingivitis, e.g., by reducing gingival alkalinity), and/or treat and/or prevent dental calculus accumulation, formation, and/or development.
More specifically, the present disclosure provides an oral composition including serine and one or more organic mono-phosphate or multi-phosphate salts, wherein the pH of the composition is between about 6.0 and about 9.5. The pH of the composition can be, e.g., between about 6.1 and about 6.3. The pH of the composition can be, e.g., between about 6.7 and about 7.0. The organic mono-phosphate or multi-phosphate salts can include, e.g., one or more biological salts. The biological salts can include, e.g., one or more inositol (e.g., phytate) salts. The phytates can include, e.g., sodium phytate. The composition can include, e.g., serine phytate.
Any of the above oral compositions can be provided in an orally acceptable dosage form. The orally acceptable dosage form can be, e.g., a chewable tablet, a piece of chewing gum, a dentifrice, a mouthwash, a rinse, and/or a toothpaste.
Any of the above oral compositions can include one or more devices. One or more surfaces of the device can include, e.g., serine and one or more organic mono-phosphate or multi-phosphate salts, wherein the pH of the surface is between about 6.0 and about 9.5. The pH of the surface can be, e.g., between about 6.1 and about 6.3. The pH of the surface can be, e.g., between about 6.7 and about 7.0. The organic mono-phosphate or multi-phosphate salts can include, e.g., one or more biological salts. The biological salts can include, e.g., one or more inositols (e.g., phytates). The phytates can include, e.g., sodium phytate. The composition can include, e.g., serine phytate. The device can be, e.g., a brush, a piece of floss, a flosser, an irrigator, a mouth guard, a pick, a retainer, a scraper, a spatula, and/or a stick.
The document also provides a method of treating or preventing plaque or periodontal disease (e.g., gingivitis), the method comprising administering an effective amount of any of the above oral compositions to a subject (e.g., a human) having, or at risk of having, plaque or periodontal disease. The oral composition can be, e.g., applied to one or more teeth (e.g., the exposed enamel, dentine, and/or cementum of one or more teeth) of the subject.
The terms “periodontal disease” and “periodontitis” are used interchangeably herein, and refer to one or more periodontal (gum) diseases in an oral cavity (e.g., gingivitis).
The terms “plaque” and “calculus” are used interchangeably herein, and refer to dental plaque or calculus on one or more hard (e.g., teeth) or soft (e.g., mucosal tissue) surfaces in an oral cavity.
As used herein, the term “overnight” is defined as being about 21 hours.
As used herein, the terms “about” and “approximately” are defined as being within plus or minus 10% of a given value or state, preferably within plus or minus 5% of said value or state.
Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Methods and materials are described herein for use in the present invention; other, suitable methods and materials known in the art can also be used. The materials, methods, and examples are illustrative only and not intended to be limiting. All publications, patent applications, patents, sequences, database entries, and other references mentioned herein are incorporated by reference in their entirety. In case of conflict, the present specification, including definitions, will control.
Other features and advantages of the invention will be apparent from the following detailed description and figures, and from the claims.
The present disclosure is based, in part, on the discovery that novel compositions comprising serine and an organic mono- or multi-phosphate salt (e.g., a biological salt such as a phytate) are useful in the treatment and/or prevention of periodontal disease (e.g., gingivitis, e.g., by reducing gingival alkalinity). The compositions disclosed herein are alternately or additionally useful in the treatment and/or prevention of plaque (e.g., by inhibiting, reducing, and/or reversing the accumulation, formation, and/or development of dental calculus).
Multiple aspects of the physiology and pathology of the common amino acids found in the oral cavity and elsewhere in the human body were characterized. In particular, each amino acid was examined to determine whether and to what extent it could modulate the pH of the oral cavity. In light of the known alkalinity-promoting functions of amino acids such as arginine and urea in the oral cavity, it was surprisingly found that compositions comprising serine uniquely possess the ability, in the presence of salivary urea, to lower the pH from an alkaline level (i.e., >7.0) to about neutrality (i.e., about 7.0) or even (depending on arginine concentration) to a slightly acidic level (i.e., <7.0). Thus, serine-containing compositions can be used to counteract some of the undesirable alkalinity generated by the catabolism of urea and other nitrogen-containing entities by bacteria in the oral cavity.
Without wishing to be bound by theory, the addition of a serine-containing composition to saliva provides serine as a “pH-fall” factor, as it causes a reduction in pH when converted from serine to cysteine to pyruvate to lactate by bacteria in the oral cavity. Without wishing to be bound by theory, altering the pH of the oral cavity using such a composition can help promote the dominance of saccharidic microorganisms in subgingival dental plaque over asaccharidic microorganisms, thus reducing the overall accumulation and formation of dental calculus. Such serine-containing compositions are also useful in treating and preventing periodontal disease.
It was found that the effectiveness of such serine-containing compositions can be further improved by the addition of one or more organic mono- or multi-phosphate salts (e.g., a biological salt such as an inositol salt (e.g., an inositol monophosphate salt, an inositol pentaphosphate salt, or an inositol hexaphosphate (a.k.a., phytate) salt such as sodium phytate and potassium phytate). Phytates are phosphate anions with phosphate groups that readily form complexes with calcium ions, complexes easily solubilized in aqueous solutions (e.g., saliva). Without wishing to be bound by theory, the phosphate anions present on phytates and other organic mono- or multi-phosphate salts can serve as carriers in binding to and solubilizing free calcium ions (thereby effectively removing them from saliva) and thus inhibiting the overall accumulation and formation of dental plaque.
pH Response of Exemplary Compositions Containing Amino AcidsAs expected, salivary sediment containing 28 mM urea showed a significant rise in pH from neutrality to about 9.0 after 4 hours of incubation at 37° C. (
In a similar assay, the pH of salivary sediment containing 90 or 120 mM serine, but without urea, dropped from neutrality to about 6.0 after 4 hours of incubation at 37° C., then rose to ˜6.6-6.8 after 21 hours of incubation at 37° C.
Unless otherwise specified, all incubation steps described below were at 37° C.
Salivary sediment containing 90 or 120 mM glycine in addition to 28 mM urea showed a rise in pH from neutrality to 8.72 (90 mM glycine) or 8.90 (120 mM glycine) after 4 hours of incubation, falling to 8.65 (90 mM glycine) or 8.55 (120 mM glycine) after 21 hours of incubation. In salivary sediment containing glycine but without urea, the pH fell from 6.80 to ˜6.40 after 4 hours of incubation, then rose to ˜7.0-7.15 after 21 hours of incubation (
Salivary sediment containing 90 or 120 mM alanine in addition to 28 mM urea showed a rise in pH from neutrality to 8.82 (90 mM alanine) or 8.72 (120 mM alanine) after 4 hours of incubation, falling slightly to 8.80 (90 mM alanine) or 8.67 (120 mM alanine) after 21 hours of incubation. In salivary sediment containing alanine but without urea, the pH fell to 6.30 after 4 hours of incubation, then rose slightly to ˜6.4 after 21 hours of incubation (
Salivary sediment containing 90 or 120 mM valine in addition to 28 mM urea showed a rise in pH to 8.90 (90 mM valine) or 8.80 (120 mM valine) after 4 hours of incubation, falling slightly to 8.85 (90 mM valine) or 8.70 (120 mM valine) after 21 hours of incubation. In salivary sediment containing valine but without urea, the pH fell to ˜6.3-6.5 after 4 hours of incubation, then rose to ˜6.4-6.7 after 21 hours of incubation (
Salivary sediment containing 90 or 120 mM histidine in addition to 28 mM urea showed a rise in pH from neutrality to 8.30 after 4 hours of incubation, remaining at 8.30 (90 mM histidine) or falling slightly to 8.22 (120 mM histidine) after 21 hours of incubation. In salivary sediment containing histidine but without urea, the pH fell to ˜6.92-7.00 after 4 hours of incubation, then rose to 7.20 after 21 hours of incubation (
Salivary sediment containing 9 mM leucine in addition to 28 mM urea showed a rise in pH from neutrality to 8.85 after 4 hours of incubation, falling to 8.60 after 21 hours of incubation. Similarly, salivary sediment containing 9 mM isoleucine in addition to 28 mM urea showed a rise in pH from neutrality to 8.90 after 4 hours of incubation, falling to 8.65 after 21 hours of incubation. In salivary sediment containing leucine but without urea, the pH fell to 6.15 after 4 hours of incubation, then rose to 6.40 after 21 hours of incubation. In salivary sediment containing isoleucine but without urea, the pH fell to 6.40 after 4 hours of incubation, then rose to 6.62 after 21 hours of incubation (
Salivary sediment containing 9 mM aspartic acid in addition to 28 mM urea showed a rise in pH to 8.90 after 4 hours of incubation, falling to 8.60 after 21 hours of incubation. Similarly, salivary sediment containing 9 mM glutamic acid in addition to 28 mM urea showed a rise in pH to 8.90 after 4 hours of incubation, falling to 8.50 after 21 hours of incubation. In salivary sediment containing aspartic acid but without urea, the pH remained at 7.00 after overnight incubation. In salivary sediment containing glutamic acid but without urea, the pH fell to 6.70 after overnight incubation (
Salivary sediment containing 9 mM cystine or 9 mM cysteine in addition to 28 mM urea showed a rise in pH to 8.80 (cystine) or 8.75 (cysteine) after 4 hours of incubation, falling to 8.50 (cystine) or 8.55 (cysteine) after 21 hours of incubation. In salivary sediment containing cystine but without urea, the pH fell to 6.35 after overnight incubation. In salivary sediment containing cysteine but without urea, the pH fell to 6.35 after 4 hours of incubation, then rose to 6.60 after 21 hours of incubation (
Salivary sediment containing 9 mM lysine or 9 mM arginine in addition to 28 mM urea showed a rise in pH to 8.70 (lysine) or 8.80 (arginine) after overnight incubation. In salivary sediment containing lysine but without urea, the pH remained at neutrality after overnight incubation. In salivary sediment containing arginine but without urea, the pH rose to 7.97 after 21 hours of incubation (
Salivary sediment containing 9 mM phenylalanine or 9 mM tyrosine in addition to 28 mM urea showed a rise in pH to 8.87 after 4 hours of incubation, falling to 8.65 (phenylalanine) or 8.62 (tyrosine) after overnight incubation (
Salivary sediment containing 9 mM threonine or 9 mM proline in addition to 28 mM urea showed a rise in pH to 8.90 (threonine) or 9.00 (proline) after 4 hours of incubation, falling to 8.60 (threonine) or 8.80 (proline) after overnight incubation. In salivary sediment containing threonine or proline but without urea, the pH fell to 6.20 (threonine) or 6.10 (proline) after 4 hours of incubation, then remained about unchanged after 21 hours of incubation (
Salivary sediment containing 9 mM methionine or 9 mM tryptophan in addition to 28 mM urea showed a rise in pH to 9.00 after 4 hours of incubation, falling slightly to 8.90 after overnight incubation. In salivary sediment containing methionine or tryptophan but without urea, the pH fell to 6.20 after overnight incubation (
Salivary sediment containing 9 mM glutamine in addition to 28 mM urea showed a rise in pH to 9.00 after 4 hours of incubation, falling to 8.80 after overnight incubation. In salivary sediment containing glutamine but without urea, the pH fell to 5.95 after 4 hours of incubation, then rose to 6.25 after 21 hours of incubation (
Salivary sediment containing 9 mM asparagine in addition to 28 mM urea showed a rise in pH to 8.90 after 4 hours of incubation, falling to 8.70 after 21 hours of incubation. In salivary sediment containing asparagine but without urea, the pH fell to 6.55 after 4 hours of incubation, then rose to 7.35 after overnight incubation (
Salivary sediment containing 6.70 mM serine in addition to 6.70 mM urea showed a rise in pH to 7.60 after 21 hours of incubation. In salivary sediment containing 6.70 mM serine but without urea, the pH fell to 5.95 after 4 hours of incubation, then rose to 6.30 after 21 hours of incubation (
Similarly, salivary sediment containing 8.30 mM serine in addition to 6.70 mM urea showed a rise in pH to 7.50 after 21 hours of incubation. In salivary sediment containing 8.30 mM serine but without urea, the pH fell to 5.90 after 4 hours of incubation, then rose to 6.25 after 21 hours of incubation (
The pH of salivary sediment containing 20 mM serine and 3 mM sodium phytate showed very little change from neutrality even with 6.70 mM urea. A similar pH pattern was observed with salivary sediment containing 25 mM serine, 3 mM sodium phytate, and 6.70 mM urea. In the absence of urea, salivary sediment containing 20 mM serine showed a pH drop to 6.20 from an initial pH of 6.90 after 4 hours of incubation; then, at 21 hours, it rose to 6.65. In the absence of urea, salivary sediment containing 25 mM serine showed a pH drop to 6.17 from an initial pH of 7.00 after 4 hours of incubation; then, at 21 hours, it rose to 6.70 (
The pH of salivary sediment containing 20 or 25 mM serine and 6 mM sodium phytate showed very little change from neutrality even with 6.70 mM urea. In the absence of urea, salivary sediment containing 20 mM serine showed a pH drop to 7.15 (and salivary sediment containing 25 mM serine showed a pH drop to 6.17) after 4 hours of incubation; then, at 21 hours, it rose to 6.47 (20 mM serine) or 6.45 (25 mM serine) (
The pH of salivary sediment containing 238 mM serine and 6 mM sodium phytate in addition to 6.70 mM urea showed a small rise in pH at the early stages of incubation, and dropped to 6.50 by 21 hours of incubation. In the absence of urea, the pH dropped to 6.00 after 4 hours of incubation; then, at 21 hours, it rose to 6.25 (
When a small block of tooth substance with only enamel exposed (
The initial supernatant calcium level was 21.58 μg/ml for the mixture containing serine, sodium phytate, urea, and exposed enamel of a tooth piece, which gradually rose to 44.80 μg/ml after overnight incubation. The same incubation mixture without the exposed enamel of a tooth piece showed an initial supernatant calcium level of 19.74 μg/ml, which gradually rose to 33.11 μg/ml by the end of the incubation. In the absence of urea in the incubation mixture containing serine, sodium phytate, and exposed enamel of a tooth piece, the initial supernatant calcium level was 20.15 μg/ml, which rose to 73.87 μg/ml after 21 hours of incubation. In the absence of urea and the absence of exposed enamel of a tooth piece, the incubation mixture containing serine and sodium phytate showed an initial supernatant calcium level of 21.08 μg/ml, which rose to 43.30 μg/ml at the end of the incubation (
Mixtures containing an exposed piece of tooth cementum (
The initial supernatant calcium level was 20.65 μg/ml for the mixture containing serine, sodium phytate, urea, and exposed cementum of a tooth piece, which rose to 41.30 μg/ml after 21 hours of incubation. The same incubation mixture without the exposed tooth cementum showed an initial supernatant calcium level of 17.83 μg/ml, which rose to 33.94 μg/ml by the end of the incubation. In the absence of urea in the incubation mixture containing serine, sodium phytate, and exposed cementum of a tooth piece, the initial supernatant calcium level was 22.65 μg/ml, which rose to 69.31 μg/ml after 21 hours of incubation. In the absence of urea and the absence of exposed cementum of a tooth piece, the incubation mixture containing serine and
sodium phytate showed an initial supernatant calcium level of 17.00 μg/ml, which rose to 34.77 μg/ml at the end of the incubation (
When the initial pH of the incubation mixture containing salivary sediment, serine, and urea was not adjusted to pH 7.00 before incubation, the initial pH was 8.10, and the pH gradually fell to 6.85 by the end of the incubation. The same pH drop was observed in the absence of urea, except that the pH fell to 6.50 from an initial pH of 8.10 after 21 hours (
In some aspects, the compositions and methods described herein include the manufacture and use of pharmaceutical compositions and medicaments that include one or more bivalent compounds as disclosed herein. Also included are the pharmaceutical compositions themselves.
In some aspects, the compositions disclosed herein can include other compounds, drugs, or agents used for the treatment of plaque and/or periodontal disease. For example, in some instances, pharmaceutical compositions disclosed herein can be combined with one or more (e.g., one, two, three, four, five, or less than ten) compounds. When co-administered, serine- and phosphate salt-containing compositions disclosed herein can operate in conjunction with other agents used for the treatment of plaque and/or periodontal disease to produce mechanistically additive or synergistic therapeutic effects.
In some aspects, the pH of the compositions disclosed herein can be adjusted with pharmaceutically acceptable acids, bases, or buffers. The pH of the compositions disclosed herein is optimally in the range of about 6.0 to about 9.5, preferably in the range of about 6.1 to about 7.0 (e.g., about 6.1 to about 6.3 or about 6.7 to about 7.0).
Pharmaceutical compositions typically include a pharmaceutically acceptable carrier, adjuvant, or vehicle. As used herein, the phrase “pharmaceutically acceptable” refers to molecular entities and compositions that are generally believed to be physiologically tolerable and do not typically produce an allergic or similar untoward reaction, such as gastric upset, dizziness and the like, when administered to a human. A pharmaceutically acceptable carrier, adjuvant, or vehicle is a composition that can be administered to a patient, together with a compound of the invention, and which does not destroy the pharmacological activity thereof and is nontoxic when administered in doses sufficient to deliver a therapeutic amount of the compound. Exemplary conventional nontoxic pharmaceutically acceptable carriers, adjuvants, and vehicles include saline, solvents, dispersion media, coatings, antibacterial and antifungal agents, isotonic and absorption delaying agents, and the like, compatible with pharmaceutical administration.
In particular, pharmaceutically acceptable carriers, adjuvants, and vehicles that can be used in the pharmaceutical compositions of this invention include, but are not limited to, ion exchangers, alumina, aluminum stearate, lecithin, self-emulsifying drug delivery systems (SEDDS) such as d-α-tocopherol polyethylene glycol 1000 succinate, surfactants used in pharmaceutical dosage forms such as Tweens or other similar polymeric delivery matrices, serum proteins, such as human serum albumin, buffer substances such as phosphates, glycine, sorbic acid, potassium sorbate, partial glyceride mixtures of saturated vegetable fatty acids, water, salts or electrolytes, such as protamine sulfate, disodium hydrogen phosphate, potassium hydrogen phosphate, sodium chloride, zinc salts, colloidal silica, magnesium trisilicate, polyvinyl pyrrolidone, cellulose-based substances, polyethylene glycol, sodium carboxymethylcellulose, polyacrylates, waxes, polyethylene-polyoxypropylene-block polymers, polyethylene glycol and wool fat. Cyclodextrins such as α-, β-, and γ-cyclodextrin, may also be advantageously used to enhance delivery of compounds of the formulae described herein.
As used herein, the serine- and phosphate salt-containing compositions disclosed herein are defined to include pharmaceutically acceptable derivatives or prodrugs thereof. A “pharmaceutically acceptable derivative” means any pharmaceutically acceptable salt, solvate, or prodrug, e.g., carbamate, ester, phosphate ester, salt of an ester, or other derivative of a compound or agent disclosed herein, which upon administration to a recipient is capable of providing (directly or indirectly) a compound described herein, or an active metabolite or residue thereof. Preferred derivatives and prodrugs include derivatives where a group that enhances aqueous solubility is appended to the structure of formulae described herein. Such derivatives are recognizable to those skilled in the art without undue experimentation. Nevertheless, reference is made to the teaching of Burger's Medicinal Chemistry and Drug Discovery, 5th Edition, Vol. 1: Principles and Practice, which is incorporated herein by reference to the extent of teaching such derivatives.
The serine- and phosphate salt-containing compositions disclosed herein include pure enantiomers, mixtures of enantiomers, pure diastereoisomers, mixtures of diastereoisomers, diastereoisomeric racemates, mixtures of diastereoisomeric racemates and the meso-form and pharmaceutically acceptable salts, solvent complexes, morphological forms, or deuterated derivative thereof.
In particular, pharmaceutically acceptable salts of serine- and phosphate salt-containing compositions disclosed herein include, e.g., those derived from pharmaceutically acceptable inorganic and organic acids and bases. Examples of suitable acid salts include acetate, adipate, benzoate, benzenesulfonate, butyrate, citrate, digluconate, dodecylsulfate, formate, fumarate, glycolate, hemisulfate, heptanoate, hexanoate, hydrochloride, hydrobromide, hydroiodide, lactate, maleate, malonate, methanesulfonate, 2-naphthalenesulfonate, nicotinate, nitrate, palmoate, phosphate, picrate, pivalate, propionate, salicylate, succinate, sulfate, tartrate, tosylate, trifluoromethylsulfonate, and undecanoate.
Salts derived from appropriate bases include, e.g., alkali metal (e.g., sodium), alkaline earth metal (e.g., magnesium), ammonium and N-(alkyl)4+ salts. The invention also envisions the quaternization of any basic nitrogen-containing groups of the serine- and phosphate salt-containing compositions disclosed herein. Water or oil-soluble or dispersible products can be obtained by such quaternization.
In some aspects, the pharmaceutical compositions disclosed herein can include an effective amount of serine and/or one or more phosphate salts. The terms “effective amount” and “effective to treat,” as used herein, refer to an amount or a concentration of one or more compounds or a pharmaceutical composition described herein utilized for a period of time (including acute or chronic administration and periodic or continuous administration) that is effective within the context of its administration for causing an intended effect or physiological outcome (e.g., treatment or prevention of plaque or periodontal disease). In some aspects, pharmaceutical compositions can further include one or more additional compounds, drugs, or agents used for the treatment of plaque and/or periodontal disease in amounts effective for causing an intended effect or physiological outcome (e.g., treatment or prevention of plaque or periodontal disease).
Administration of Pharmaceutical CompositionsThe pharmaceutical compositions disclosed herein can be formulated or adapted for administration to a subject via any oral route, e.g., any oral route approved by the Food and Drug Administration (FDA). Exemplary methods are described in the FDA Data Standards Manual (DSM) (available at http://www.fda.gov/Drugs/DevelopmentApprovalProcess/FormsSubmissionRequirements/ElectronicSubmissions/DataStandardsManualmonographs).
For example, pharmaceutical compositions of this invention can be orally administered in any orally acceptable dosage form including, but not limited to, capsules, tablets (e.g., confections such as (soft) chewable tablets), emulsions and aqueous suspensions, dispersions, pastes or powders (e.g., dentifrices or toothpastes), gums (e.g., chewing gums), and solutions (e.g., mouthwashes or other rinses). In the case of tablets for oral use, carriers which are commonly used include lactose and corn starch. Lubricating agents, such as magnesium stearate, are also typically added. For oral administration in a capsule form, useful diluents include lactose and dried corn starch. When aqueous suspensions or emulsions are administered orally, the active ingredient may be suspended or dissolved in an oily phase combined with emulsifying or suspending agents. If desired, certain sweetening, flavoring, or coloring agents can be added.
In some aspects, an effective dose of a pharmaceutical composition of this invention can include, but is not limited to, e.g., about 0.00001, 0.0001, 0.001, 0.01, 0.02, 0.03, 0.04, 0.05, 0.06, 0.07, 0.08, 0.09, 0.1, 0.15, 0.2, 0.25, 0.3, 0.35, 0.4, 0.45, 0.5, 0.55, 0.6, 0.65, 0.7, 0.75, 0.8, 0.85, 0.9, 0.95, 1, 1.25, 1.5, 1.75, 2, 2.5, or 3-10,000 mg/kg/day serine and/or one or more phosphate salts, or according to the requirements of the particular pharmaceutical composition.
When the pharmaceutical compositions disclosed herein include a combination of a serine- and phosphate salt-containing composition described herein and one or more additional compounds (e.g., one or more additional compounds, drugs, or agents used for the treatment of plaque and/or periodontal disease), both the compound and the additional compound should be present at dosage levels of between about 1 to 100%, and more preferably between about 5 to 95% of the dosage normally administered in a monotherapy regimen. The additional agents can be administered separately, as part of a multiple dose regimen, from the compounds of this invention. Alternatively, those agents can be part of a single dosage form, mixed together with the compounds of this invention in a single composition.
In some aspects, the pharmaceutical compositions disclosed herein can be included in a container, pack, or dispenser together with instructions for administration.
Methods of TreatmentThe methods disclosed herein contemplate administration of an effective amount of a compound or composition to achieve the desired or stated effect. Typically, the compounds or compositions of the invention will be administered from about 1 to about 6 times per day. Such administration can be used as a chronic or acute therapy. The amount of active ingredient that can be combined with the carrier materials to produce a single dosage form will vary depending upon the host treated and the particular mode of administration. A typical preparation will contain from about 5% to about 95% active compound (w/w). Alternatively, such preparations can contain from about 20% to about 80% active compound. In some aspects, the present disclosure provides methods for using a composition comprising serine and/or one or more phosphate salts, including pharmaceutical compositions (indicated below as ‘X’) disclosed herein in the following methods:
Substance X for use as a medicament in the treatment of one or more diseases or conditions disclosed herein (e.g., plaque, referred to in the following examples as ‘Y’). Use of substance X for the manufacture of a medicament for the treatment of Y; and substance X for use in the treatment of Y.
In some aspects, the methods disclosed include the administration of a therapeutically effective amount of one or more of the compounds or compositions described herein to a subject (e.g., a mammalian subject, e.g., a human subject) who is in need of, or who has been determined to be in need of, such treatment. In some aspects, the methods disclosed include selecting a subject and administering to the subject an effective amount of one or more of the compounds or compositions described herein, and optionally repeating administration as required for the prevention or treatment of plaque and/or periodontal disease.
In some aspects, subject selection can include obtaining a sample from a subject (e.g., a candidate subject) and testing the sample for an indication that the subject is suitable for selection. In some aspects, the subject can be confirmed or identified, e.g. by a health care professional, as having had or having a condition or disease (e.g., periodontal disease). In some aspects, suitable subjects include, for example, subjects who have or had a condition or disease but that resolved the disease or an aspect thereof, present reduced symptoms of disease (e.g., relative to other subjects (e.g., the majority of subjects) with the same condition or disease), or that survive for extended periods of time with the condition or disease (e.g., relative to other subjects (e.g., the majority of subjects) with the same condition or disease), e.g., in an asymptomatic state (e.g., relative to other subjects (e.g., the majority of subjects) with the same condition or disease). In some aspects, exhibition of a positive immune response towards a condition or disease can be made from patient records, family history, or detecting an indication of a positive immune response. In some aspects, multiple parties can be included in subject selection. For example, a first party can obtain a sample from a candidate subject and a second party can test the sample. In some aspects, subjects can be selected or referred by a medical practitioner (e.g., a general practitioner). In some aspects, subject selection can include obtaining a sample from a selected subject and storing the sample or using the sample in the methods disclosed herein. Samples can include, e.g., plaque or saliva.
In some aspects, methods of treatment can include a single administration, multiple administrations, and repeating administration of one or more compounds disclosed herein as required for the prevention or treatment of the disease or condition from which the subject is suffering (e.g., periodontal disease). In some aspects, methods of treatment can include assessing a level of disease in the subject prior to treatment, during treatment, or after treatment. In some aspects, treatment can continue until a decrease in the level of disease in the subject is detected.
The term “subject,” as used herein, refers to any animal. In some instances, the subject is a mammal. In some instances, the term “subject,” as used herein, refers to a human (e.g., a man, a woman, or a child).
The terms “administer,” “administering,” or “administration,” as used herein, refer to orally administering a compound or composition, regardless of form. For example, the methods disclosed herein include administration of an effective amount of a compound or composition to achieve the desired or stated effect. The pharmaceutical compositions disclosed herein can optionally be administered to the oral cavity or specific portions of the oral cavity (e.g., one or more teeth, or one or more portions of one or more teeth (e.g., exposed enamel, dentine, or cementum)) using one or more devices known in the art, e.g., brushes (e.g., toothbrushes), floss or flossers (e.g., dental floss), irrigators (e.g., oral irrigators), picks (e.g., dental picks or toothpicks), scrapers (e.g., tongue cleaners or scrapers), spatulas, sticks, retainers or mouth guards, etc.
The terms “treat”, “treating,” or “treatment,” as used herein, refer to partially or completely alleviating, inhibiting, ameliorating, or relieving the disease or condition from which the subject is suffering. This means any manner in which one or more of the symptoms of a disease or disorder (e.g., plaque or periodontal disease) are ameliorated or otherwise beneficially altered. As used herein, amelioration of the symptoms of a particular disorder (e.g., plaque) refers to any lessening, whether permanent or temporary, lasting or transient that can be attributed to or associated with treatment by the compositions and methods of the present invention. In some embodiments, treatment can promote or result in, for example, a decrease in amount of plaque (e.g., in a subject) relative to the amount of plaque prior to treatment; or reductions in one or more symptoms associated with one or more periodontal diseases (e.g., gingivitis) in a subject relative to the subject's symptoms prior to treatment.
The terms “prevent,” “preventing,” and “prevention,” as used herein, shall refer to a decrease in the occurrence of a disease or decrease in the risk of acquiring a disease or its associated symptoms in a subject. The prevention may be complete, e.g., the total absence of disease in a subject. The prevention may also be partial, such that the occurrence of the disease in a subject is less than, occurs later than, or develops more slowly than that which would have occurred without the present invention.
Specific dosage and treatment regimens for any particular patient will depend upon a variety of factors, including the activity of the specific compound employed, the age, body weight, general health status, sex, diet, time of administration, rate of excretion, drug combination, the severity and course of the disease, condition or symptoms, the patient's disposition to the disease, condition or symptoms, and the judgment of the treating physician.
An effective amount can be administered in one or more administrations, applications or dosages. A therapeutically effective amount of a therapeutic compound (i.e., an effective dosage) depends on the therapeutic compounds selected. Moreover, treatment of a subject with a therapeutically effective amount of the compounds or compositions described herein can include a single treatment or a series of treatments. For example, effective amounts can be administered at least once. The compositions can be administered one from one or more times per day to one or more times per week; including once every other day. The skilled artisan will appreciate that certain factors can influence the dosage and timing required to effectively treat a subject, including but not limited to the severity of the disease or disorder, previous treatments, the general health or age of the subject, and other diseases present.
Following administration, the subject can be evaluated to detect, assess, or determine their level of disease. In some instances, treatment can continue until a change (e.g., reduction) in the level of disease in the subject is detected. Upon improvement of a patient's condition (e.g., a change (e.g., decrease) in the level of disease in the subject), a maintenance dose of a compound, or composition disclosed herein can be administered, if necessary. Subsequently, the dosage or frequency of administration, or both, can be reduced, e.g., as a function of the symptoms, to a level at which the improved condition is retained. Patients may, however, require intermittent treatment on a long-term basis upon any recurrence of disease symptoms.
EXAMPLES Example 1: MaterialsTwenty-one amino acids that comprise the bulk of the amino acids found in humans were tested for their potential effects on intra-oral pH. These amino acids included: glycine, alanine, glutamic acid, glutamine, aspartic acid, valine, histidine, leucine, isoleucine, cystine, cysteine, arginine, lysine, phenylalanine, serine, tyrosine, threonine, proline, methionine, tryptophan, and asparagine. Samples of each amino acid were obtained (Sigma-Aldrich, St. Louis, Mo.) for study of their acidic and alkalinic tendencies within the human oral cavity, as it relates to elements of periodontitis pathology (e.g., dental caries, dental calculus, and gingivitis).
Example 2: MethodsTo obtain human salivary sediment for performance of the experiments described herein, paraffin wax (4.02 g) was chewed by human subjects (including some subjects 70+ years of age, where oral alkalinity is commonly more prevalent) to stimulate the flow of saliva. Prior to the experiment, the subjects fasted for 12 hours and abstained from oral hygiene for at least 24 hours (to enable spontaneous dental plaque bacterial growth and buildup on their teeth and other oral surfaces (Kleinberg. I., 1967, Arch. Oral Biol., 1457-1473)). As a result of this process, oral bacteria were dislodged by the inert paraffin wax from the teeth and oral soft tissue surfaces in the mouths of the human subjects. About 40 ml of whole saliva was then collected from each subject by expectoration into a 50 ml polypropylene centrifuge tube chilled by surrounding it with cracked ice (Korayem, M. R., Traudt, M., and Kleinberg, I., 1990; Sandham, H. J. and Kleinberg, I., 1973).
The saliva collected was centrifuged at 1740 g in an International Equipment Company clinical centrifuge (Needham Heights, Mass.) for 15 min. at 4° C. The supernatant was decanted and discarded. To wash the remaining bacterial sediment, 40 ml of ice-cold distilled water was added and mixed in a vortex mixer. The resulting sediment-water mixture was centrifuged at 1740 g for 15 min. at 4° C. The supernatant was again decanted and discarded. This bacterial sediment washing procedure was repeated twice. To the washed bacterial sediment, 10 ml of deionized water was added and the composition was then mixed briefly and thoroughly in a vortex mixer. The sediment was transferred to a 15 ml polypropylene centrifuge tube. The resulting suspension was centrifuged at 1740 g for 15 min. at 4° C. and the resulting supernatant was aspirated and discarded.
To the packed 1.0 ml of salivary sediment obtained after centrifugation, 1.0 ml of de-ionized water was added to make a 50% salivary sediment suspension for the preparation of the following standard incubation mixtures: salivary sediment at 16.7% (v/v), with and without added individual amino acids: serine, glycine, alanine, valine, and/or histidine, etc. at either a 90 or 120 mM concentration; and leucine, isoleucine, aspartic acid, glutamine, cysteine, cystine, lysine, arginine, tyrosine, phenylalanine, threonine, proline, methionine, tyrosine, glutamine, and/or asparagine, each at 9 mM. These mixtures were each prepared in the presence or absence of 28 mM urea, which has a relatively high pH.
The initial pH of the incubation mixtures was carefully adjusted to or near 7.0 with either 1.0 M NaOH or 1.0 M HCl. Each bacterial mixture was then incubated overnight in a water bath at 37° C. The pH of each mixture was then determined using a combined pH and reference electrode (Radiometer Analytical SAS, Villeurbanne, France) at pre-determined time intervals.
Separately, incubation mixtures containing salivary sediment at 16.7% (v/v) and 6.7 or 8.3 mM serine in the presence or absence of 6.7 mM urea, 20 or 25 mM serine and/or 3 mM sodium phytate (Sigma-Aldrich, St. Louis, Mo.), both in the presence or absence of 6.7 mM urea were prepared. Mixtures were incubated overnight at 37° C. in a water bath incubator (Kleinberg, I. and Hall, G., 1968; Salako, N. O. and Kleinberg, I., 1989), after adjusting the initial pH to or near 7.0 with 1N NaOH or 1N HCl.
Separately, incubation mixtures containing salivary sediment at 16.7% (v/v), 20 or 25 mM serine, and 6 mM sodium phytate were prepared in the presence or absence of 6.7 mM urea. Mixtures were incubated overnight at 37° C. in a water bath incubator, after adjusting the initial pH to or near 7.0 with 1N NaOH or 1N HCl.
Separately, incubation mixtures containing salivary sediment at 16.7% (v/v), 238 mM serine, and 6 mM sodium phytate were prepared in the presence or absence of 6.7 mM urea. Mixtures were incubated overnight at 37° C. in a water bath incubator, after adjusting the initial pH to or near 7.0 with 1N NaOH or 1N HCl.
Separately, incubation mixtures were prepared containing a sample of human molar tooth (e.g., enamel crown with undesirable exposed dentin covered by and hence painted over with inert nail polish (
Similar incubation mixtures were also prepared containing a sample of tooth cementum (e.g., from the roots of human molar teeth (
Separately, incubation mixtures containing salivary sediment at 16.7% (v/v), 238 mM serine, and 6 mM sodium phytate, with or without 6.7 mM urea, were prepared and incubated without adjusting the initial pH to or near 7.0, except for salivary sediment mixed with de-ionized water, which was adjusted to pH 8.10 with 1 M NaOH. Determination of the pH of each of these experimental entities were carried out at pre-determined time intervals (i.e., at 0 min., 15 min., 30 min., 1 h, 2 h, 3 h, 4 h, and 21 h) with a pH meter (Radiometer Copenhagen, type PHM26, Radiometer America, Westlake, Ohio) and a combination pH electrode (Radiometer Analytical, Cedex, France).
Other EmbodimentsIt is to be understood that while the invention has been described in conjunction with the detailed description thereof, the foregoing description is intended to illustrate and not limit the scope of the invention, which is defined by the scope of the appended claims. Other aspects, advantages, and modifications are within the scope of the following claims.
REFERENCES
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- 4. Grases, F., Perelló, J., Sanchis, P., Isern, B., Prieto, R. M., Costa-Bauzá, A., Santiago, C., Ferragut, M. L., and Frontera, G. 2009. Anticalculus effect of a triclosan mouthwash containing phytate: a double-blind, randomized, three-period cross over trial. J. Periodont. Res. 44: 616-621.
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- 6. Heaney, R. P., Weaver, C. M., and Fitzsimmons, M. L. 1991. Soybean phytate content: effect on calcium absorption. Am. J. Clin. Nutr. 53: 745-747.
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Claims
1. A method of treating or preventing periodontitis and dental calculus accumulation, the method comprising administering to the oral environment of a subject, an effective amount of an oral composition comprising serine and at least one organic mono-phosphate or multi-phosphate salt.
2. The method of claim 1, wherein the composition further includes a buffer providing the composition with a pH of between about 6.1 and 7.0.
3. The method of claim 2, wherein the composition is provided as an orally acceptable dosage form, wherein the introduction of the composition to a subject suffering from periodontitis or dental calculus accumulation, reduces the alkalinity and thereby increases calcium concentration in the saliva by dissolving the calculus.
4. The method of claim 2, wherein the pH of the composition is between about 6.1 and about 6.3.
5. The method of claim 2, wherein the pH of the composition is between about 6.7 and about 7.0.
6. The method of claim 1, wherein the organic mono-phosphate or multi-phosphate salt is a biological salt.
7. The method of claim 6, wherein the biological salt is an inositol.
8. The method of claim 7, wherein the inositol is a phytate.
9. The method of claim 8, wherein the phytate is sodium phytate.
10. The method of claim 3, wherein the orally acceptable dosage form is selected from the group consisting of capsules, tablets, emulsions, aqueous suspensions, dispersions, pastes, powders, gums, and solutions.
11. The method of claim 10, wherein the orally acceptable dosage form comprises one or more carriers, one or more lubricating agents, or one or more diluents.
12. The method of claim 11, wherein the carrier is lactose or corn starch, the lubricating agent is magnesium stearate, and the diluent is lactose or dried corn starch.
13. The method of claim 2, wherein the orally acceptable dosage form comprises one or more sweetening, flavoring, or coloring agents.
14. The method of claim 1 wherein the subject is at risk of developing plaque or periodontal disease.
15. The method of claim 14, wherein the subject is a human.
16. The method of claim 15, wherein the periodontal disease is gingivitis.
17. The method of any of claim 1, wherein the oral composition is applied to one or more teeth of the subject.
18. The method of claim 17, wherein the oral composition is applied to the enamel, exposed dentine, or cementum of one or more teeth of the subject.
Type: Application
Filed: Jun 21, 2018
Publication Date: Oct 18, 2018
Applicant: The Research Foundation for The State University of New York (Albany, NY)
Inventors: Israel Kleinberg (Smithtown, NY), Robi Chatterjee (Centereach, NY)
Application Number: 16/014,834