Abstract: Provided herein are novel compounds and novel protected compounds that can be derived from polymyxin, including, e.g., polymyxin A. The novel compounds have antibacterial properties against a diverse range of Gram negative bacteria and reduced toxicity compared to polymyxins such as polymyxin A. Also provided are antibacterial pharmaceutical compositions containing the novel compounds and novel protected compounds, as well as methods for preparing the antibacterial compounds and protected compounds.

Abstract: Provided herein are novel compounds and novel protected compounds that can be derived from polymyxin, including, e.g., polymyxin A. The novel compounds have antibacterial properties against a diverse range of Gram negative bacteria and reduced toxicity compared to polymyxins such as polymyxin A. Also provided are antibacterial pharmaceutical compositions containing the novel compounds and novel protected compounds, as well as methods for preparing the antibacterial compounds and protected compounds.

Abstract: The present invention is directed to the use of the peptide compound Pyr-His-Trp-Ser-Tyr-Gly-Leu-Arg-Pro-Gly-NH2 as a therapeutic agent for the prophylaxis and/or treatment of cancer, autoimmune diseases, fibrotic diseases, inflammatory diseases, neurodegenerative diseases, infectious diseases, lung diseases, heart and vascular diseases and metabolic diseases. Moreover the present invention relates to pharmaceutical compositions preferably in form of a lyophilizate or liquid buffer solution or artificial mother milk formulation or mother milk substitute containing the peptide Pyr-His-Trp-Ser-Tyr-Gly-Leu-Arg-Pro-Gly-NH2 optionally together with at least one pharmaceutically acceptable carrier, cryoprotectant, lyoprotectant, excipient and/or diluent.

Abstract: The present invention is directed to the use of the peptide compound Ac-Arg-Phe-Met-Trp-Met-Arg-NH2 as a therapeutic agent for the prophylaxis and/or treatment of cancer, autoimmune diseases, fibrotic diseases, inflammatory diseases, neurodegenerative diseases, infectious diseases, lung diseases, heart and vascular diseases and metabolic diseases. Moreover the present invention relates to pharmaceutical compositions preferably in form of a lyophilisate or liquid buffer solution or artificial mother milk formulation or mother milk substitute containing the peptide Ac-Arg-Phe-Met-Trp-Met-Arg-NH2 optionally together with at least one pharmaceutically acceptable carrier, cryoprotectant, lyoprotectant, excipient and/or diluent.

Abstract: Methods for preparing a glycopeptide are disclosed. The methods comprise the steps of selecting a protected glycopeptide of the formula A1-A2-A3-A4-A5-A6-A7, wherein the groups A1 to A7 comprise the heptapeptide structure of naturally occurring vancomycin; at least A4 is linked to a glycosidic group which has a hexose residue linked to A4; and the protected glycopeptide has no free amino or carboxyl groups and has a free primary hydroxyl group only at the 6-position of said hexose residue. The protected glycopeptide is contacted with a compound of the formula ArSO2G where Ar is an aryl group and G is a leaving group under conditions effective to allow reaction of said free primary hydroxyl group to form a glycopeptide sulfonate ester; and the glycopeptide sulfonate ester is contacted with a nucleophile under conditions effective to allow displacement of a sulfonate group to produce a substituted glycopeptide.

Abstract: The invention provides a nucleic acid molecule comprising at least a functional fragment of the viomycin biosynthetic gene cluster, functional proteins encoded by the cluster, expression cassettes and recombinant host cells comprising a functional fragment of the viomycin cluster, and methods for generating biologically active agents using the nucleic acid molecules of the present invention.

Abstract: The present invention relates to compounds having antibiotic activity which are obtained from body fluids of mollusks, namely of certain West-African snails, to therapeutic drugs comprising these compounds, and to the use thereof for the preparation of a therapeutic drug for controlling infectious pathogens in humans and animals.

Abstract: The invention relates to a process for the conversion of echinocandin class of peptides to their C4-homotyrosine monodeoxy analogues, particularly mulundocandin to deoxymulundocandin, which consists of a single step selective reduction of C4-htyr (homotyrosine) hydroxyl group of echinocandins to their monodeoxy analogues under neutral conditions without prior protection/deprotection of the equally facile C5-Orn (ornithine) hydroxyl group and purification of the monodeoxy compound from the crude reaction mixture.

Abstract: The invention includes antibiotic pharmaceutical compositions comprising eukaryotic histone H1 protein and methods of using eukaryotic histone H1 protein to kill or to inhibit the growth of microorganisms, including, but not limited to, human pathogenic bacteria. The invention further includes a eukaryotic histone H1-containing animal feed and methods of improving growth of an animal by supplying the feed to the animal. The invention still further includes a kit comprising a eukaryotic histone H1-containing antibiotic pharmaceutical composition and an instructional material which describes the use of the composition. In addition, the invention includes a vaccine comprising a eukaryotic histone H1 protein and a method of vaccinating an animal using the vaccine.

Abstract: The present invention is directed to novel 38-decarboxy-38-hydroxymethyl derivatives of teicoplanin antiobiotics and a process for preparing them which includes submitted the corresponding lower alkyl ester precursor to a reduction reaction in the presence of an alkali metal borohydride. The compounds of the invention show an improved antibacterial activity against some clinical isolates of Staphylococci somewhat resistant to teicoplanin.The teicoplanin derivatives of the present invention are represented by the following formula: ##STR1## wherein: X represents hydroxymethyl;R represents hydrogen or --N?(C.sub.9 -C.sub.12)aliphatic acyl!-.beta.-D-2-deoxy-2-aminoglucopyranosyl;R.sub.1 represents hydrogen or N-acetyl-.beta.-D-2-deoxy-2-aminoglucopyranosyl;R.sub.2 represents hydrogen of alpha-D-mannopyranosyl;R.sub.3 represents hydrogen or a protecting group of the amino function; and the acid addition salts thereof; with the proviso that R.sub.1 represents hydrogen only when R and R.sub.

Abstract: The present invention is directed to novel antibiotic A 40926 derivatives characterized by having a carboxy, (C.sub.1 -C.sub.4) alkoxy-carbonyl, aminocarbonyl, (C.sub.1 -C.sub.4) alkylaminocarbonyl, di (C.sub.4 -C.sub.4)alkylaminocarbonyl or hydroxymethyl substituent on the N-acylaminoglucuronyl moiety and a hydroxy or a polyamine substituent in position 63 of the molecule. The compounds of the invention show high in vitro activity against glycopeptide resistant Enterococci and Staphylococci.

Abstract: A class of broad spectrum bioactive polypeptides termed "Magainin" have been described. These peptides have a molecular weight of about 2500 or less, are highly water soluble, amphiphilic and non-hemolytic.

Abstract: Balhimycin, a compound of the molecular formula C.sub.66 H.sub.73 Cl.sub.2 N.sub.9 O.sub.24, is a novel Glycopeptide antibiotic and has the following structure (SEQ. ID. No.

Abstract: Certain propionitrile compounds which have a cyclohexapeptidyl nucleus and which are found to have antibiotic activity with physical properties suitable for use in therapeutic compositions are described. A novel process for their preparation is also described.

Abstract: The present invention provides a composition of matter useful as an antimicrobial agent. This composition of matter comprises at least two polypeptides selected from the group consisting of human polymorphonuclear leukocyte, polypeptides having on apparent molecular weights of about 3,500 daltons, about 13,000 daltons, about 18,000 daltons, about 29,000 daltons, and about 54,000 daltons. The composition of matter has respiratory burst-independent, antimicrobial activity for bacteria and fungi at a pH from about 5.0 to about 8.0 and at calcium ion concentrations up to about 10 mM, bactericidal activity at sodium chloride concentrations up to about 0.3M, and fungicidal activity at sodium chloride concentrations up to about 0.15M. Methods for preparing this composition of matter are also provided.Further provided are purified polypeptides useful as antimicrobial agents, and methods for producing these polypeptides.

Abstract: A method for treating cutaneous and corneal wounds as well as certain microbial-related diseases comprises topically applying a defensin peptide to the affected tissue. The compositions comprise a natural, synthetic, or analog defensin molecule having both a mitogenic activity capable of stimulating cell growth and an antimicrobial activity capable of inhibiting the growth of a wide variety of pathogens. In addition to therapeutic use, the defensins are useful as mitogens in cell and tissue culture media.

Abstract: A biologically active peptide which includes the following structure:R.sub.1 --R.sub.1 --R.sub.1 --R.sub.3 --R.sub.5 --R.sub.1 --R.sub.1 --R.sub.1 --R.sub.1 --R.sub.1 --R.sub.2 --R.sub.2 --R.sub.1 --R.sub.1 R.sub.3 --R.sub.1 --R.sub.4 --R.sub.1 --R.sub.3 --R.sub.4 --R.sub.1 --R.sub.1.R.sub.1 is a hydrophobic amino acid, R.sub.2 is a basic hydrophilic amino acid, and R.sub.3 is a neutral hydrophilic amino acid, R.sub.4 is a hydrophobic or basic hydrophilic amino acid, and R.sub.5 is a hydrophobic, basic hydrophilic, or neutral hydrophilic amino acid.Examples of such peptides include the following:(SEQ ID NO:1)--NH.sub.2 ;(SEQ ID NO:2)--NH.sub.2 ;(SEQ ID NO:3)--NH.sub.2 ;(SEQ ID NO:4)--NH.sub.2 ;(SEQ ID NO:5)--NH.sub.2 ;(SEQ ID NO:6)--NH.sub.2 ;(SEQ ID NO:7)--NH.sub.2 ; and(SEQ ID NO:8).The peptides may be employed in pharmaceutical compositions.

Abstract: The present invention is directed to new de-(acetylglucosaminyl)-di(dehydro)deoxy teicoplanin derivatives which possess antibiotic activity mainly against gram positive bacteria.The new compounds are obtained by chemical modification of a teicoplanin antibiotic substance.

Abstract: Mersacidin, a cyclic peptide of the formula I ##STR1## has antibiotic activity.