Abstract
Moxalactam was administered subconjunctivally in 100-mg doses to rabbits with infected eyes (Staphylococcus aureus endophthalmitis). High concentrations of drug were detected in the sclera, cornea, and choroid; much lower levels were found in the retina, whereas peak concentrations in the vitreous were about 6 microgram/ml. Repeated intramuscular injections of 50 mg/kg every 4 h produced peak serum levels of about 100 microgram/ml. A gradient between the choroid and the retina was again evident, and peak vitreous levels were about 6 microgram/ml after six injections. These data are consistent with the concept of a blood-retina barrier analogous to the blood-brain barrier. Moxalactam appears to penetrate the eye somewhat better than do other beta-lactams; however, the peak levels produced in the vitreous humor in this animal model were below the level required to inhibit most strains of Pseudomonas aeruginosa.
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Selected References
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- Abel R., Jr, Boyle G. L. Dissecting ocular tissue for intraocular drug studies. Invest Ophthalmol. 1976 Mar;15(3):216–219. [PubMed] [Google Scholar]
- Barza M., Kane A., Baum J. L. Regional differences in ocular concentration of gentamicin after subconjunctival and retrobulbar injection in the rabbit. Am J Ophthalmol. 1977 Mar;83(3):407–413. doi: 10.1016/0002-9394(77)90741-3. [DOI] [PubMed] [Google Scholar]
- Barza M., Kane A., Baum J. A collagenase digestion method for bioassay of antibiotics in ocular tissues. Am J Ophthalmol. 1978 Jul;86(1):121–128. doi: 10.1016/0002-9394(78)90028-4. [DOI] [PubMed] [Google Scholar]
- Barza M., Kane A., Baum J. Oxacillin for bacterial endophthalmitis: subconjunctival, intravenous, both, or neither? Invest Ophthalmol Vis Sci. 1980 Nov;19(11):1348–1354. [PubMed] [Google Scholar]
- Barza M., Tally F. P., Jacobus N. V., Gorbach S. L. In vitro activity of LY127935. Antimicrob Agents Chemother. 1979 Sep;16(3):287–292. doi: 10.1128/aac.16.3.287. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Cordera C. S., Pekarek R. S. Treatment of experimental Haemophilus influenzae type b meningitis with 1-oxa-beta-lactam (LY127935). Antimicrob Agents Chemother. 1980 Feb;17(2):258–262. doi: 10.1128/aac.17.2.258. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Landesman S. H., Corrado M. L., Cherubin C. C., Gombert M., Cleri D. Diffusion of a new beta-lactam (LY 127935) into cerebrospinal fluid. Implications for therapy of gram-negative bacillary meningitis. Am J Med. 1980 Jul;69(1):92–98. doi: 10.1016/0002-9343(80)90505-7. [DOI] [PubMed] [Google Scholar]
- Neu H. C., Aswapokee N., Fu K. P., Aswapokee P. Antibacterial activity of a new 1-oxa cephalosporin compared with that of other beta-lactam compounds. Antimicrob Agents Chemother. 1979 Aug;16(2):141–149. doi: 10.1128/aac.16.2.141. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Oakley D. E., Weeks R. D., Ellis P. P. Corneal distribution of subconjunctival antibiotics. Am J Ophthalmol. 1976 Mar;81(3):307–312. doi: 10.1016/0002-9394(76)90245-2. [DOI] [PubMed] [Google Scholar]
- Schaad U. B., McCracken G. H., Jr, Loock C. A., Thomas M. L. Pharmacokinetics and bacteriological efficacy of moxalactam (LY127935), netilmicin, and ampicillin in experimental gram-negative enteric bacillary meningitis. Antimicrob Agents Chemother. 1980 Mar;17(3):406–411. doi: 10.1128/aac.17.3.406. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Young P., Barza M., Kane A., Baum J. Radioactive and bioassay of intraocular antibiotics: double-assay technique to compare penicillin G, cefamandole, and gentamicin in ocular tissues in vivo. Arch Ophthalmol. 1979 Apr;97(4):717–720. doi: 10.1001/archopht.1979.01020010369019. [DOI] [PubMed] [Google Scholar]
- Yu V. L., Vickers R. M., Zuravleff J. J. Comparative susceptibilities of Pseudomonas aeruginosa to 1-oxacephalosporin (LY 127935) and eight other antipseudomonal antimicrobial agents (old and new). Antimicrob Agents Chemother. 1980 Jan;17(1):96–98. doi: 10.1128/aac.17.1.96. [DOI] [PMC free article] [PubMed] [Google Scholar]
