The present invention concerns the separation, identification and characterization of active peptide fragments from peptones.

Antiviral protease inhibitors are disclosed, along with related antiviral dipeptidyl compounds, macrocyclic derivatives thereof and methods of using the same to treat or prevent viral infection and disease from coronaviruses, caliciviruses, and picornaviruses.

The present invention concerns a compound of following formula (I): where: —R.sub.1 is H or OH, —R.sub.2 is a (C.sub.1-C.sub.6)alkyl, COOH, COO—((C.sub.1-C.sub.6)alkyl) or thiazolyl group, —R.sub.3 is H or a (C.sub.1-C.sub.6)alkyl group, and —R.sub.4 is: .square-solid.a straight-chain or branched, saturated or unsaturated hydrocarbon group having 1 to 8 carbon atoms substituted by one or more groups chosen from among OH and NR.sub.5R.sub.6, .square-solid.—(CH.sub.2CH.sub.2X.sub.1)(CH.sub.2CH.sub.2X.sub.2).sub.a2(CH.sub.2CH.sub.2X.sub.3).sub.a3(CH.sub.2CH.sub.2X.sub.4).sub.a4(CH.sub.2CH.sub.2X.sub.5).sub.a5R.sub.7, .square-solid.an aryl-(C.sub.1-C.sub.8)alkyl group substituted by one or more groups chosen from among OH and NR.sub.9R.sub.10 groups, or .square-solid.a heterocycle-(C.sub.1-C.sub.8)alkyl group optionally substituted by one or more groups chosen from among (C.sub.1-C.sub.6)alkyl, OH and NR.sub.12R.sub.13 groups, or a pharmaceutically acceptable salt, hydrate or solvate thereof, and its uses in particular for the treatment of cancer, pharmaceutical compositions containing the same and the preparation methods thereof.

##STR00001##

Prodrugs of an NMDA antagonist, (S)-1-phenyl-2-(pyridin-2-yl)ethanamine, useful for the treatment of depression (particularly major depressive disorder) or pain; compositions comprising them, and methods of making them.

Some embodiments include compounds that can inhibit the growth of bacterial and/or inhibit or reduce microbial infections caused by one or more microorganisms (e.g., Pseudomonas aeruginosa and Cryptococcus neoformans) and methods of using these compounds to treat microbial infection and outbreaks and/or to reduce the formation of biofilms. Other embodiments include synthesis of the compounds that can inhibit the growth of one or more microorganisms and/or inhibit or reduce microbial infections.

Some embodiments include compounds that can inhibit the growth of bacterial and/or inhibit or reduce microbial infections caused by one or more microorganisms (e.g., Pseudomonas aeruginosa and Cryptococcus neoformans) and methods of using these compounds to treat microbial infection and outbreaks and/or to reduce the formation of biofilms. Other embodiments include synthesis of the compounds that can inhibit the growth of one or more microorganisms and/or inhibit or reduce microbial infections.

Compounds are described herein where CCK2R targeting ligands are attached to an imaging agent through a linker. The compounds can be used in the detection, diagnosis, imaging and treatment of cancer.

Methods of treating aging related skin changes and of increasing skin thickness with topical administration of N-acyldipeptide derivatives are described. Compositions comprising N-acyldipeptide derivatives, are therapeutically effective for increasing skin thickness, and for treating extrinsic and intrinsic aging and aging related skin changes, such as fine lines, wrinkles, photoaging, hyperpigmentation, laxity, age spots, lentigines, mottled skin, and cellulite.

Antiviral protease inhibitors are disclosed, along with related antiviral dipeptidyl compounds, macrocyclic derivatives thereof and methods of using the same to treat or prevent viral infection and disease from coronaviruses, caliciviruses, and picornaviruses.

The proteasome inhibitors of this invention include peptide-based compounds with a short linear sequence of amino acids. An oxo or thio group is attached to the N-terminal amino acid. A protein-reactive electrophilic group such as an epoxyketone, an aziridinylketone, or a beta-lactone is attached to the C-terminal amino acid. Upon contact with a proteasome complex in a target cell, the electrophilic group reacts with a functional group in or near a binding pocket or active site of the proteasome, forming a covalent bond and thereby inactivating the proteasome. These and other proteasome inhibitors can be screened for binding affinity and an ability to selectively eliminate senescent cells or cancer cells. Compounds that selectively remove senescent cells can be developed for the treatment of conditions such as osteoarthritis, ophthalmic disease, pulmonary disease, and atherosclerosis.