title: In vitro antibacterial activity and beta-lactamase stability of SCE-129, a new cephalosporin.
abstract: SCE-129 [3-4-carbamoyl-1-pyridiniomethyl-7beta- (d-alpha-sulfophenylacetamido)-ceph-3-em-4-carboxylate] is a cephalosporin that inhibits Pseudomonas aeruginosa and Staphylococcus aureus. SCE-129 is tenfold more active than carbenicillin in inhibiting P. aeruginosa. SCE-129 has poor activity against Enterobacteriaceae compared with other cephalosporins and is 16-fold less active than the cephalosporins against streptococci. The activity of SCE-129 does not correlate with beta-lactamase stability, although SCE-129 is resistant to hydrolysis by gram-positive and gram-negative bacteria. The compound does not inhibit the hydrolysis of other cephalosporins. Although SCE-129 acts synergistically with gentamicin to inhibit some Pseudomonas, this cannot be predicted based on knowledge of resistance to one or more compounds.
mesh_terms: D001419:Bacteria / Q000187:drug effects*; D002510:Cephalosporinase / Q000378:metabolism*; D002511:Cephalosporins / Q000494:pharmacology*; D004355:Drug Stability; D004357:Drug Synergism; D065093:beta-Lactamase Inhibitors; D001618:beta-Lactamases / Q000378:metabolism*
chemical_list: D002511:Cephalosporins; D065093:beta-Lactamase Inhibitors; D002510:Cephalosporinase; D001618:beta-Lactamases