Studies on Chloramphenicol. VI

Studies on Digitalis VI

T IS undisputed that the administration of digitalis to patients with many forms of congestive heart failure results in an improvement in both the clinical state and in the abnormal circulatory dynamics that are characteristic of heart failure.'-6 The effects of digitalis in subjects without heart failure are less well defined. Although some glycosides augment the contractile force of nonfailin...

Drug resistance of staphylococci. VI. Genetic determinant for chloramphenicol resistance.

Naturally occurring strains of staphylococci which are resistant to chloramphenicol (CM) inactivate this antibiotic. One of the inactivation products of CM showed the chromatographic behavior of 3-acetoxychloramphenicol. Induction of resistance occurred after prior exposure to subinhibitory concentrations of the antibiotic. The resistance of induced populations, as well as CM-inactivation abili...

X-ray studies on phospholipid bilayers. XI. Interactions with chloramphenicol.

Chloramphenicol is a widely used antibiotic with low levels of toxicity. However, scanning electron microscopy revealed morphological changes in human erythrocytes when they interacted in vitro with therapeutical concentrations of chloramphenicol. To explain this shape change, a study concerned with the possible interactions of this antibiotic with bilayers built-up of phospholipids located in ...

Chloramphenicol.

Microbial transformation of antibiotics. VI. Acylation of chloramphenicol by Streptomyces coelicolor.

Previous papers in this series have described the microbial transformation of clindamycin to clindamycm-S-phosphate1^ Ndemethylclindamycin2), clindamycin sulfoxide2) or clindamycin ribonucleotides3) by Streptomyces species. We have extended our observations on the ability of these organisms to transform antibiotics, to chloramphenicol (I, Fig. 1) which, like clindamycin, binds at the 50S riboso...