Abstract: The present invention is directed to methods for the treatment of Hodgkin's lymphoma comprising administering to a patient in need thereof, a therapeutically effective amount of 4-cyano-N-(2-(4,4-dimethylcyclohex-1-en-1-yl)-6 -(2,2,6,6-tetramethyltetrahydro-2H-pyran-4-yl)pyridin-3-yl)-1H-imidazole-2-carboxamide as mono-therapy or as combination or co-therapy with one or more chemotherapeutic agent or chemotherapy regimens.
Type:
Application
Filed:
March 13, 2014
Publication date:
January 21, 2016
Inventors:
Carla DE BOER, Yusri A. ELSAYED, Imran KHAN, Carl L. MANTHEY, Linda SNYDER
Abstract: Methods are provided for treating acute kidney injury in a subject, particularly ischemia-induced kidney injury and/or hypoxia-induced kidney injury. The methods comprise administering to the subject an ETA receptor antagonist, such as atrasentan or a pharmaceutically acceptable salt thereof. Methods of diagnosing and treating such kidney injuries are also provided. Methods of reducing or preventing loss of kidney function and/or renal mass or volume, and methods of delaying progression to chronic kidney disease are also provided.
Abstract: The present invention relates to an (S)-enantiomer of an aminoheteroaryl compound for use in treating and/or preventing cancer in a subject. The invention further relates to a pharmaceutical composition comprising said compound. Another aspect of the invention is directed to an in vitro method for determining the effectiveness of said (S)-enantiomer of an aminoheteroaryl compound, or said pharmaceutical composition, the method comprising the steps of: (a) obtaining a cell or tissue sample from a subject; and (b) determining the subject's NUDT1/MTH1-status; wherein a NUDT1/MTH1-positive cell or tissue sample is indicative of an effective treatment and/or prevention of cancer. In addition, provided herein is a screening method for identifying a target of an (S)-enantiomer of an aminoheteroaryl compound. Furthermore, in context of this invention, the herein described compounds inhibit the biological activity of MTH1.
Type:
Application
Filed:
August 27, 2013
Publication date:
January 21, 2016
Applicant:
CeMM - FORSCHUNGSZENTRUM FÜR MOLEKULARE MEDIZIN GmbH
Abstract: A composition for oromucosal delivery of at least one active ingredient, more particularly a lipid nano-microdelivery system comprising a nicotine component and/or a flavour component, wherein the nicotine component may be delivered to the oral cavity via absorption through the mucosal membranes thereof and/or wherein the flavour component may be delivered to the oral mucosa by controlled release.
Type:
Application
Filed:
March 6, 2014
Publication date:
January 21, 2016
Inventors:
Ioannis S. Chronakis, Lars Jorgensen, Maria Ahlm Mattebjerg
Abstract: A combination which comprises (a) corticosteroid and (b) a dual muscarinic antagonist-?2 adrenergic agonist compound, or any pharmaceutically acceptable salt or solvate thereof.
Type:
Application
Filed:
February 27, 2014
Publication date:
January 21, 2016
Inventors:
Monica APARICI VIRGILI, Marta CALBET MURTRO, Montserrat MIRALPEIX GUELL, Amadeu GAVALDA MONEDERO, Carlos PUIG DURAN
Abstract: The invention provides a method of treating T-cell mediated diseases and a method of inhibiting the activation of T-cells using certain diketopiperazines. The invention also provides methods of synthesizing diketopiperazines and pharmaceutical compositions comprising certain diketopiperazines. The invention further provides methods of making improved pharmaceutical compositions of proteins and peptides by either increasing or decreasing the content of diketopiperazines in the compositions and the resultant improved pharmaceutical compositions.
Type:
Application
Filed:
March 3, 2015
Publication date:
January 21, 2016
Inventors:
David Bar-Or, Raphael Bar-Or, Richard Shimonkevitz
Abstract: The present invention relates to novel crystalline forms of vortioxetine hydrobromide, in particular three crystalline forms, a process for their preparation, a pharmaceutical composition containing said novel crystalline forms, and a process for the purification of vortioxetine or a salt thereof, comprising the formation of one or more of the novel crystalline forms of vortioxetine hydrobromide described herein.
Type:
Application
Filed:
July 6, 2015
Publication date:
January 21, 2016
Applicant:
DIPHARMA FRANCIS S.r.l.
Inventors:
Stefano Luca GIAFFREDA, Marco CURZI, Elena DICHIARANTE, Pietro ALLEGRINI, Renzo GRAZIOSI, Chiara VLADISKOVIC
Abstract: A method of promoting remyelination in a subject in need thereof includes administering to the subject a therapeutically effective amount of at least one (1,3) Diazole compound, wherein the therapeutically effective amount is the amount effective to induce endogenous oligodendrocyte precursor cell (OPC) differentiation in the subject's central nervous system.
Type:
Application
Filed:
May 27, 2015
Publication date:
January 21, 2016
Inventors:
Paul Tesar, Fadi J. Najm, Robert H. Miller
Abstract: The present invention relates to a stable oral pharmaceutical dosage form comprising imatinib mesylate and one or more pharmaceutically acceptable excipients wherein the amount of imatinib calculated as free base is more than 80% by weight based on the total weight of the oral pharmaceutical dosage form, and wherein the oral dosage form does not show polymorphic conversion after storage at 40° C. and 75% relative humidity for three months. It also relates to processes for the preparation thereof.
Abstract: In alternative embodiments, the invention provides compositions and methods for overcoming or diminishing or preventing Growth Factor Inhibitor resistance in a cell, or, a method for increasing the growth-inhibiting effectiveness of a Growth Factor inhibitor on a cell, or, a method for re-sensitizing a cell to a Growth Factor Inhibitor, comprising for example, administration of a combination of a TBK1 inhibitor and an RTK inhibitor. In alternative embodiments, the cell is a tumor cell, a cancer cell or a dysfunctional cell.
Type:
Application
Filed:
July 7, 2014
Publication date:
January 21, 2016
Inventors:
David CHERESH, Laetitia SEGUIN, Sudarshan ANAND
Abstract: Erastin analogs are useful in treating various cancers, particularly multiple myeloma. Erastin analogs are also useful in treating cancers that are resistant to other anticancer agents. This abstract is intended as a scanning tool for purposes of searching in the particular art and is not intended to be limiting of the present invention.
Type:
Application
Filed:
August 20, 2015
Publication date:
January 21, 2016
Inventors:
Paul B. Robbins, Sudhir R. Sahasrabudhe
Abstract: Provided herein are methods of treating an inflammatory-based disease or disorder in a subject by administering a composition comprising CaPterin-6-COOH.
Abstract: Compounds of the formula I in which R1 and R2 have the meanings indicated in Claim 1, are inhibitors of GCN2, and can be employed, inter alia, for the treatment of cancer.
Type:
Application
Filed:
February 10, 2014
Publication date:
January 21, 2016
Applicant:
MERCK PATENT GMBH
Inventors:
Dieter DORSCH, Guenter HOELZEMANN, Michel CALDERINI, Ansgar WEGENER, Oliver POESCHKE
Abstract: Provided are modulators of TLRs of Formula II: pharmaceutically acceptable salts thereof, compositions containing such compounds, and therapeutic methods that include the administration of such compounds.
Type:
Application
Filed:
July 20, 2015
Publication date:
January 21, 2016
Inventors:
Manoj C. Desai, Randall L. Halcomb, Paul Hrvatin, Hon Chung Hui, Ryan McFadden, Paul A. Roethle, Hong Yang
Abstract: The present invention relates to methods for treating and/or preventing autoimmune diabetes, particularly LADA, as well as diseases related or associated therewith, comprising the administration of an effective amount of a certain DPP-4 inhibitor, as well as to the use of a certain DPP-4 inhibitor for modifying disease trajectory of autoimmune diabetes (particularly LADA).
Abstract: A method of treating a movement abnormality associated with the pathology of a neurological movement disorder, such as Parkinson's disease or Restless Leg(s) Syndrome by administering a therapeutically effective amount of a PDE7 inhibitory agent. An aspect of the invention provides for the administration of a PDE& inhibitory agent in conjunction with a dopamine agonist or precursor, such as levodopa. In another aspect of the invention, the PDE7 inhibitory agent may be selective for PDE7 relative to other molecular targets (i) known to be involved with the pathology of Parkinson's disease or (ii) at which other drug(s) that are therapeutically effective to treat Parkinson's disease act.
Type:
Application
Filed:
July 22, 2015
Publication date:
January 21, 2016
Inventors:
John E. Bergmann, Neil S. Cutshall, Gregory A. Demopulos, Vincent A. Florio, George A. Gaitanaris, Patrick Gray, John Hohmann, Rene Onrust, Hongkui Zeng
Abstract: The invention relates to iron(III) complex compounds and pharmaceutical compositions comprising them for the use as medicaments, in particular for the treatment and/or prophylaxis of iron deficiency symptoms and iron deficiency anemias.
Type:
Application
Filed:
March 27, 2014
Publication date:
January 21, 2016
Inventors:
Thomas Bark, Wilm Buhr, Susanna Burckhardt, Michael Burgert, Camillo Canclini, Franz Dürrenberger, Felix Funk, Peter O. Geisser, Aris Kalogerakis, Simona Mayer, Erik Philipp, Diana Sieber, Jörg Schmitt, Katrin Schwarz, Stefan Reim
Abstract: A composition comprising from 0.005% to 0.02% bimatoprost by weight and from 100 ppm to 250 ppm benzalkonium chloride, wherein said composition is an aqueous liquid which is formulated for ophthalmic administration is disclosed herein. A method which is useful in treating glaucoma or ocular hypertension related thereto is also disclosed herein.
Type:
Application
Filed:
February 27, 2015
Publication date:
January 21, 2016
Inventors:
CHIN-MING CHANG, JAMES N. CHANG, RHETT M. SCHIFFMAN, R. SCOTT JORDAN, JOAN-EN CHANG-LIN
Abstract: Biocompatible microparticles include an ophthalmically active cyclic lipid component and a biodegradable polymer that is effective, when placed into the subconjunctival space, in facilitating release of the cyclic lipid component into the anterior and posterior segments of an eye for an extended period of time. The cyclic lipid component can be associated with a biodegradable polymer matrix, such as a matrix of a two biodegradable polymers. Or, the cyclic lipid component can be encapsulated by the polymeric component. The present microparticles include oil-in-water emulsified microparticles. The subconjunctivally administered microparticles can be used to treat or to reduce at least one symptom of an ocular condition, such as glaucoma or age related macular degeneration.
Type:
Application
Filed:
August 10, 2015
Publication date:
January 21, 2016
Inventors:
James Chang, Patrick Hughes, Chin-Ming Chang
Abstract: The present invention is about a method of producing testosterone formulation and the testosterone formulation produced thereby. The method of this invention comprises dissolving testosterone propionate and dibucaine HCl in alcohol, adding particular percentages of polyethylene glycol 400 and polyethylene glycol 4000, and cooling under particular speed to produce the testosterone formulation which has the advantages of moderate viscosity, easy to use and excellent particle consistency.
Abstract: The present invention relates to the use of a combination of a PDE5-inhibitor and testosterone for the preparation of a medicament for the treatment of Female Sexual Dysfunction.
Abstract: Autologous compositions and methods are provided for cartilage repair in patients in need thereof. Some aspects include combinations of platelet-based materials with chondrogenesis inducing agents in the presence or absence of cell-based therapies.
Abstract: The present invention provides a composition and method for treating endometriosis which generally, comprises a mixture of anabolic steroids and the administration of same. The first anabolic steroid used is stanozolol used in conjunction with nandralone. The composition is preferably deployed an as injectable liquid suspension. It is also possible to deploy the steroids used herein as an oral administration of the stanozolol alone with an injection of nandralone weekly or as a daily topical nandralone cream.
Abstract: The present invention provides compositions and methods for use in the treatment of hyperproliferative dermal diseases. Specifically, the present invention teaches pharmaceutical compositions for topical administration consisting essentially of a vitamin D metabolite, calcipotriol, and nicotinamide, which are particularly effective in treating and in the maintenance therapy of psoriasis and other related dermal disorders and diseases.
Type:
Application
Filed:
September 30, 2015
Publication date:
January 21, 2016
Inventors:
Avikam HAREL, Zeev EVEN-CHEN, Olga BLOCH
Abstract: The present invention relates to a novel crystals of 5-({[2-amino-3-(4-carbamoyl-2,6-dimethyl-phenyl)-propionyl]-[1-(4-phenyl-1h-imidazol-2-yl)-ethyl]-amino}-methyl)-2-methoxy-benzoic acid and methods of making the zwitterion of 5-({[2-amino-3-(4-carbamoyl-2,6-dimethyl-phenyl)-propionyl]-[1-(4-phenyl-1h-imidazol-2-yl)-ethyl]-amino}-methyl)-2-methoxy-benzoic acid.
Type:
Application
Filed:
July 22, 2015
Publication date:
January 21, 2016
Inventors:
Luigi Anzalone, Frank J. Villani, Christopher A. Teleha, Penina Feibush, Barry Fegely
Abstract: Methods of stimulating anti-tumor activity in a subject with cancer are provided. The methods include administering to a subject in need thereof a low dose low dosage of a composition comprising a molecule that inhibits Hsp90 linked to a mitochondria-penetrating moiety; and administering to the subject an effective amount of an inhibitor of autophagy or glycolysis.
Abstract: The present disclosure relates, inter alia, to compositions and methods for treating viral diseases and cancer. There are disclosed lipophilic antiviral and anticancer acyclic nucleoside phosphonate diesters, preparation thereof, and methods of using the compounds to treat viral diseases and cancer.
Type:
Application
Filed:
October 2, 2015
Publication date:
January 21, 2016
Inventors:
Karl Y. Hostetler, James R. Beadle, Nadejda Valiaeva
Abstract: The present disclosure relates to pantothenate derivatives for the treatment of neurologic disorders (such as pantothenate kinase-associated neurodegeneration), pharmaceutical compositions containing such compounds, and their use in treatment of neurologic disorders.
Type:
Application
Filed:
September 30, 2015
Publication date:
January 21, 2016
Inventors:
Andrew Vaino, Marek Biestek, Martin Shkreli
Abstract: The present invention relates to matriptase antibodies and immunoconjugates of matriptase antibodies with cytotoxic agents and the use thereof for killing or inhibiting the growth of matriptase-expressing cancer cells, such as those of multiple myeloma and breast cancers. In particular, immunoconjugates comprising a matriptase monoclonal antibody and anticancer agents such as doxorubicin (DOX) are introduced, which are equipotent to anticancer agents used in free form but exhibit significantly reduced cardiotoxicity and almost no adverse effects on normal bone marrow-derived mesenchymal stromal cells that do not express matriptase. The present invention also provides compositions comprising these new immunoconjugates and use of them for treatment of malignancies comprising cells that express matriptase.
Type:
Application
Filed:
August 26, 2015
Publication date:
January 21, 2016
Inventors:
Siang-Yo Lin, Joseph R. Bertino, Chen-Yong Lin
Abstract: The present disclosure discloses simple and efficient glycan- or carbohydrate-based processes or methods for the rapid identification of biological markers and therapeutic targets especially glycan-related targets of infectious diseases, cancers, autoimmune diseases, allergies, inflammation, toxicity, obesity and/or other disorders of humans, animals, plants and other organisms. Therefore, novel methods and products for the diagnosis, prevention, and treatment of such diseases obtainable based on these therapeutic targets can be developed.
Abstract: This disclosure relates generally to methods and pharmaceutical compositions useful in treating pulmonary hypertension. In one embodiment, for example, the disclosure provides a method for treating pulmonary hypertension comprising administering a therapeutically effective dose of a carbonic anhydrase inhibitor to a patient in need of treatment. The disclosure finds utility in the fields of medicine and pharmacology.
Type:
Application
Filed:
July 22, 2015
Publication date:
January 21, 2016
Inventors:
Thomas Najarian, Peter Y. Tam, Leland F. Wilson, Craig Peterson
Abstract: The present invention provides a novel pharmaceutical composition and method of making the same. The composition comprises an effective amount of an antiviral agent and a local anesthetic. The antiviral drug can be sorivudine. The local anesthetic can be lidocaine or its pharmaceutically acceptable salt. Herpes virus infections in humans can be caused by different human herpes viruses, the most common being herpes simplex virus types 1 and 2 (HSV1 and HSV2) and varicella-zoster virus (VZV).
Abstract: In an aspect, the invention relates to compositions, methods, and kits for inducing apoptosis. This abstract is intended as a scanning tool for purposes of searching in the particular art and is not intended to be limiting of the present invention.
Type:
Application
Filed:
March 11, 2014
Publication date:
January 21, 2016
Inventors:
Jindrich Henry Kopecek, Jiyuan Yang, Te-Wei Chu
Abstract: Methods and agents for reducing a level of an acetylated Tau polypeptide in a cell are provided. Methods for treating a tauopathy in an individual are also provided. Also provided is a method for diagnosing a cognitive impairment disorder in an individual. Methods for identifying an agent suitable for treating a tauopathy are also provided.
Abstract: The product according to the present invention is produced in a production process using the mycelium of a mushroom such as Ganoderma lucidum. The production process encourages the growing mycelium to export bioactive compounds such as beta glucans into the surrounding liquid. Thus, the beta glucan is soluble and easily absorbed. More importantly, the production process allows the beta glucan to retain its triple helix structure which is required for maintain a very high bioactive efficacy. The beta glucans from Ganoderma lucidum can be used in a cream for treatment of psoriasis.
Abstract: A topical anti-microbial composition and use thereof comprising a quaternized chitosan derivative having a polymerizable organic moiety and an amphoteric surfactant.
Abstract: The present invention relates to a composition in the form of a powder or a viscous paste, and which includes at least one low viscosity alginate having a viscosity of less than about 100 mPaS in a 1 wt % aqueous solution, and at least one high viscosity alginate having a viscosity of more than about 100 mPaS in a 1 wt % aqueous solution. The composition can also include at least one suspending agent. The composition is readily soluble in water such that an aqueous preparation can be prepared without substantive mixing. Also, the aqueous preparation is suitable for use in the treatment and/or prevention of overweight for both therapeutic and non-therapeutic purposes.
Type:
Application
Filed:
January 30, 2015
Publication date:
January 21, 2016
Applicant:
S-BIOTEK AF 15. MARTS 2006 1 APS
Inventors:
Finn LARSEN, Brian MALM, Jens Steen OLSEN
Abstract: Some embodiments of the present disclosure include a dental gel formulation for protecting a user's teeth and gums from acid resulting from acid reflux disease or bacterial plaque. The dental gel may include a gel carrier and a treatment ingredient, the treatment ingredient being a member selected from the group consisting of an antibacterial ingredient, an acid neutralizing ingredient, a vitamin, a mineral ingredient, a probiotic, natural extracts and oils, and medication. In some embodiments, the gel carrier may be a poloxamer 407 gel, and the treatment ingredients may include sodium bicarbonate, calcium carbonate, xylitol, and optionally melatonin.
Abstract: Provided are electrokinetically-altered fluids (gas-enriched electrokinetic fluids) comprising an ionic aqueous solution of charge-stabilized oxygen-containing nanostructures in an amount sufficient to provide modulation of at least one of cellular membrane potential and cellular membrane conductivity, and therapeutic compositions and methods for use in treating diabetes and diabetes-associated conditions or disorders (e.g., insulin resistance), or symptoms thereof. Provided are electrokinetically-altered ionic aqueous fluids optionally in combination with other therapeutic agents. Particular aspects provide for regulating or modulating intracellular signal transduction associated with said inflammatory responses by modulation of at least one of cellular membranes, membrane potential, membrane proteins such as membrane receptors, including but not limited to G-Protein Coupled Receptors (GPCR), and intercellular junctions (e.g., tight junctions, gap junctions, zona adherins and desmasomes).
Type:
Application
Filed:
April 21, 2015
Publication date:
January 21, 2016
Inventors:
Richard L. Watson, Anthony B. Wood, Gregory J. Archambeau
Abstract: Dispersing gas in a liquid provides a mixture of saturated, supersaturated or hypersaturated solution to provide a suspension of bubbles containing gas therein into which animal tissue is immersed for health or wellness treatment. A two-phase mixture is provided with dissolved gas as a suspension of microbubbles. Methods for making, maintaining, and using the two-phase mixture are provided. Gas molecules may be introduced into a liquid at high velocity under elevated pressure to form a supersaturated solution that retains the gas, preferably oxygen, in solution when exposed to ambient conditions.
Abstract: Chromium-three cation containing compositions in combination with Phyllanthus emblica extract and Shilajit are useful for improvement of endothelial function and cardiovascular health, including treatment of type 2 diabetes and metabolic syndrome.
Abstract: Disclosed herein are methods and materials that may be implemented to scavenge a potentially destructive free radical, peroxynitrite. Specifically exemplified are cerium based nanoparticles that react with and reduce peroxynitrite. The discoveries disclosed herein reveal several therapeutic uses of such peroxynitrite reactive particles.
Type:
Application
Filed:
February 27, 2014
Publication date:
January 21, 2016
Applicant:
UNIVERSITY OF CENTRAL FLORIDA RESEARCH FOUNDATION, INC.
Inventors:
Sudipta Seal, William T. Self, Janet Dowding
Abstract: The invention relates to a method of using metal nanoparticle or metallic particle to promote neurite outgrowth and treat and/or prevent neurological disorders. Particularly, the method of the invention uses gold nanoparticles or gold particles to promote neurite outgrowth and treat and/or prevent neurological disorders.
Type:
Application
Filed:
July 16, 2015
Publication date:
January 21, 2016
Inventors:
Ying-Chen YANG, Chia-Nan CHEN, Li-Ling CHI
Abstract: Disclosed herein are methods for treating cancer, such as a cyclin D1-overexpressing cancer, including administering to a subject in need of such treatment a composition comprising a therapeutically effective amount of an agent that mediates downregulation of cyclin D1 and/or increases sumoylation of cyclin D1.
Abstract: Methods for treating acne vulgaris include providing a solution having a peroxide compound, the solution having an antimicrobial effect for reducing bacteria that cause acne vulgaris; topically administering a therapeutically effective amount of the solution to the patient; and once administered, exposing the solution to a wavelength of light that creates a synergistic antimicrobial effect with the solution and enhances the antimicrobial effect of the solution, thereby further reducing or eliminating the bacteria that cause acne vulgaris.
Abstract: Formulations of antimicrobial, antiviral, and antineoplastic compounds in combination with certain wavelengths of light include a solution that includes an oxidizer; the solution having an initial therapeutic effectiveness; and a light of a predetermined frequency that that undergoes a synergistic reaction with the oxidizer, thereby enhancing the initial therapeutic effectiveness of the solution. A method of drug-enhancement includes providing a drug that includes hydrogen peroxide and a therapeutic chemical, the drug having an initial therapeutic effectiveness; and applying light having a predetermined frequency of light that has a synergistic reaction with the drug, thereby enhancing the initial therapeutic effectiveness of the drug.
Abstract: A nutritional composition comprises (a) one to a plurality of physiologically acceptable calcium salts and/or chelates and (b) one or more phosphorus-containing components, such as phosphate salts, and/or phosphorus-rescuing components, such as phytase. The composition is useful for phosphorus-sparing calcium supplementation of the diet of a human subject, and for treatment of a low bone density condition in a human subject in need thereof.
Abstract: The present invention comprises compositions that provide anti-glycation activity comprising a mineral extract composition or a mogroside/mineral extract composition or a mogroside composition. Such compositions are useful for methods of preventing, treating and inhibiting the effects of glycation in the body. The methods of the present invention comprise use of anti-glycation composition for the treatment and prevention of glycation related conditions including diabetes, atherosclerosis, arthritis, mental conditions and vision impairment.
Type:
Application
Filed:
July 22, 2015
Publication date:
January 21, 2016
Inventors:
Roger Blotsky, Ramon Figueroa, Krys Bojanowski, Reynold Dominguez
Abstract: Methods and compositions involving miR-122, miR-15b, miR-21, and miR-155, which are useful for the treatment of various diseases, such as cancers, are described. Further described are methods and compositions useful for increasing, activating, or regulating NK cells and surface antigens.
Type:
Application
Filed:
December 3, 2013
Publication date:
January 21, 2016
Applicant:
Ohio State Innovation Foundation
Inventors:
Michael A. Caligiuri, Jianhua Yu, Shun He, Rossana Trott
Abstract: Embodiments concern methods and/or compositions related to immunotherapy for cancer. In particular embodiments, engager immune cells harbor a vector that encodes a secretable engager molecule. In particular cases, the engager molecule has an activation domain and an antigen recognition domain. In some embodiments, the engager molecules further comprise a cytokine or co-stimulatory domain, for example.
Type:
Application
Filed:
March 5, 2014
Publication date:
January 21, 2016
Inventors:
Stephen M. G. Gottschalk, Xiao-Tong Song, Kota Iwahori, Mireya Paulina Velasquez, Stewart Abbot