GAMMA-AAPEPTIDES WITH POTENT AND BROAD-SPECTRUM ANTIMICROBIAL ACTIVITY
申请人:Cai Jianfeng
公开号:US20150274782A1
公开(公告)日:2015-10-01
The present invention is directed to a novel class of antimicrobial agents called γ-AApeptides. The current invention provides various categories of γ-AApeptides, for example, linear γ-AApeptides, cyclic γ-AApeptides, and lipidated γ-AApeptides. γ-AApeptides of the current invention are designed to exert antimicrobial activity while being stable and non-toxic. γ-AApeptides also do not appear to lead to the development of microbial resistance in treated microorganisms. Thus, the disclosed γ-AApeptides can be used for the treatment of various medical conditions associated with pathogenic microorganisms.
External preparation for skin diseases containing nitroimidazole
申请人:——
公开号:US20030092754A1
公开(公告)日:2003-05-15
An external preparation for skin disease which comprises a nitroimidazole derivative represented by the following formula (I):
1
wherein R
1
, R
3
and R
4
may be the same or different and represent a hydrogen atom, a nitro group, a lower alkyl group, a substituted lower alkyl group, a lower alkenyl group, or a substituted lower alkenyl group; and R
2
represents a hydrogen atom, a lower alkyl group, a substituted lower alkyl group and a lower alkenyl group or a substituted lower alkenyl group, provided that any one of R
1
, R
3
and R
4
is a nitro group.
AZITHROMYCIN-CONTAINING AQUEOUS PHARMACEUTICAL COMPOSITION AND A METHOD FOR THE PREPARATION OF THE SAME
申请人:SUZUKI Hidekazu
公开号:US20070087980A1
公开(公告)日:2007-04-19
The invention provides an azithromycin-containing aqueous pharmaceutical composition, which comprises at least one member selected from the group consisting of azithromycin, its anhydride, its hydrate, and pharmaceutically acceptable salts thereof, and at least one member selected from the group consisting of monoethanolamine, diethanolamine, triethanolamine, amino acid, ethylenediaminetetraacetic acid, and pharmaceutically acceptable salts thereof, and which does not comprise boric acid or pharmaceutically acceptable salts thereof, and a method for the preparation of the composition, wherein an azithromycin-containing liquid is maintained at pH of 4.0 or higher throughout the method for the preparation. The composition has good heat and storage stability.
The present invention provides new aminoglycoside dosing regimens associated with enhanced microbicidal activity and reduced nephrotoxicity, as well as methods of using these dosing regimens to treat various bacterial infections.
Kanamycin group antibiotics were subjected to enzymatic acetylation by a cell free extract containing an aminoglycoside 3-N-acetyltransferase, AAC(3)-X, derived from Streptomyces griseus SS-1198PR. Characterization of the incubated reaction mixtures by TLC and antibiotic assay revealed that a product retaining activity was specifically formed from arbekacin, an anti-MRSA semisynthetic aminoglycoside. The structural determination demonstrated that acetylation occurred at the 3″-amino group in arbekacin and amikacin, and at the 3-amino group in dibekacin as in the case of kanamycin. These results should reflected the effect of the (S)-4-amino-2-hydroxybutyryl side chain which is present in arbekacin and amikacin, but absent in dibekacin and kanamycin. The 3″-N-acetylation is the first finding in the enzymatic modifications of aminoglycoside antibiotics. 3″-N-Acetylarbekacin showed antibiotic activity as high as that of 2′-N-acetylarbekacin reported previously, whereas 3″-N-acetylamikacin showed no substantial activity. Thus, our results illuminated a novel aspect of arbekacin distinct from the other aminoglycosides.