The effects of Mn2+, neomycin and four organic Ca2(+)-channel antagonists (OCA): nicardipine, nifedipine, diltiazem and verapamil on the neuromuscular blocking activities of tubocurarine, succinylcholine (SCh), decamethonium and neomycin were studied in isolated mouse phrenic nerve-diaphragm preparations. The effective concentration of SCh for 50% inhibition (IC50) of single indirect twitch res...

A screening of a range of common laboratory antibiotics for inhibition of the hammerhead ribozyme has shown that in addition to certain aminoglycosides (most notably neomycin B) the tetracyclines are also effective inhibitors, with chlorotetracycline being more effective than tetracycline. Inhibition by chlorotetracycline is not as strong as that by neomycin B but is more complicated, with at l...

Loss of the mechanosensory hair cells in the auditory and vestibular organs leads to hearing and balance deficits. To investigate initial, in vivo events in aminoglycoside-induced hair cell damage, we examined hair cells from the lateral line of the zebrafish, Danio rerio. The mechanosensory lateral line is located externally on the animal and therefore allows direct manipulation and observatio...

Aminoglycoside exposure results in the apoptotic destruction of auditory and vestibular hair cells. This ototoxic hair cell death is prevented by broad-spectrum caspase inhibition. We have used in situ substrate detection, immunohistochemistry, and specific caspase inhibitors to determine which caspases are activated in the hair cells of the adult mouse utricle in response to neomycin exposure ...

Ten years ago, Waksman and Lechevaller1 demonstrated the important antibiotic action of neomycin against the Koch bacillus. The effect of neomycin is even greater than that of streptomycin. Rake, Hobby and Donovick' have also demonstrated the antibiotic effect of neomycin in experimental tuberculosis. Because of its toxicity, Grumbach and Rist3 considered that parenteral neomycin injection was ...

We tested 259 methicillin-resistant Staphylococcus aureus isolates and 2 USA300 ATCC type strains for susceptibility to bacitracin and neomycin contained in over-the-counter antibacterial ointments. Resistance to both bacitracin and neomycin was found only in USA300. The use of over-the counter antimicrobial drugs may select for the USA300 clone.

Abbreviations: attE: attacin E gene ELISA: Enzyme Linked Immunosorbent Assay gusA: β-glucuronidase gene GUS: glucuronidase nos: nopaline synthase gene nptII: neomycin phosphotransferase II gene NPTII: neomycin phosphotransferase II protein PCR: polymerase chain reaction PTGS: post-transcriptional gene silencing RNA: ribonucleic acid RT-PCR: reverse transcription PCR T-DNA: transfer DNA TGS: tra...

Coatomer is the soluble precursor of the COPI coat (coat protein I) involved in traffic among membranes of the endoplasmic reticulum and the Golgi apparatus. We report herein that neomycin precipitates coatomer from cell extracts and from purified coatomer preparations. Precipitation first increased and then decreased as the neomycin concentration increased, analogous to the precipitation of a ...