Protamine Has Dose-Dependent Antimicrobial Effect

Share this content:
Protamine Has Dose-Dependent Antimicrobial Effect
Protamine Has Dose-Dependent Antimicrobial Effect

FRIDAY, Nov. 11, 2016 (HealthDay News) -- Protamine has a dose-dependent antimicrobial effect, according to a study published in the November issue of Optometry and Vision Science.

Mahesh K. Bandara, Ph.D., from the University of New South Wales in Sydney, and colleagues examined the ability of protamine to kill bacteria and fungi associated with contact lens-related keratitis. The antimicrobial activity of solutions of protamine with and without polyhexamethylene biguanide (PHMB) and ethylenediamine tetra-acetic acid (EDTA) was tested using the International Organization for Standardization (ISO) for contact lens care solutions; the recommended ISO panel of microbes was tested along with six clinical isolates. The authors also assessed the effect of increasing sodium chloride concentration on the antimicrobial activity and the cytotoxicity of the final solution.

The researchers found that protamine had a dose-dependent antimicrobial effect; for most strains, the highest effect was at 228 µM. For all strains except Pseudomonas aeruginosa ATCC6538, addition of EDTA and PHMB increased the antimicrobial effect. For all microbes, optimum antimicrobial activity was achieved in 0.2 percent sodium chloride, but the activity met or exceeded the ISO standard even in 0.8 percent sodium chloride. There was no cytotoxicity to mammalian cells for any of the formulations.

"This study highlights the potential for protamine to be used for the development of effective multipurpose disinfection solutions," the authors write. "Further investigations such as stability, compatibility with contact lenses, and in vivo toxicity are warranted."

Full Text

Share this content:

is free, fast, and customized just for you!

Already a member?

Sign In Now »


Sign up for myCME e-newsletters


Drug Lookup

Browse drugs by: BrandGenericDisease

More in Home

Readings Taken in Clinic May Underestimate Ambulatory BP

Readings Taken in Clinic May Underestimate Ambulatory BP

Young, lean patients can have hypertension not caught during regular exams, researchers find

Measures Sought to ID Epilepsy Patients Who Are Safe to Drive

Measures Sought to ID Epilepsy Patients Who Are ...

Those with longer seizures during driving tests more likely to have accidents

Epilepsy Onset Not Uncommon After Stroke

Epilepsy Onset Not Uncommon After Stroke

Patients with greater brain damage more likely to have seizures afterwards, researchers find

is free, fast, and customized just for you!

Already a member?

Sign In Now »