Analysis of Bimatoprost-Induced changes on Rabbits eyelash Follicle: Clinical and Electron microscopic study

Area of Science:

• Ophthalmology
• Dermatology
• Pharmacology

Background:

• Bimatoprost is a prostaglandin analog used to treat glaucoma.
• Its cosmetic effect of eyelash growth is well-documented.
• The precise mechanism of bimatoprost on eyelash follicles requires further elucidation.

Purpose of the Study:

• To investigate the ultrastructural changes in rabbit eyelash follicles following topical bimatoprost application.
• To understand the cellular and histological mechanisms behind bimatoprost-induced eyelash enhancement.

Main Methods:

• Clinically healthy male rabbits (n=15) received daily topical bimatoprost (0.03%) in one eye for 4 weeks, with the contralateral eye serving as a control.
• Eyelash length was measured pre- and post-treatment.
• Eyelid tissues were analyzed using light and electron microscopy.

Main Results:

• Bimatoprost treatment significantly increased eyelash length compared to controls (11.60±0.46 mm vs. 9.75±0.33 mm).
• Histological examination revealed thickened epidermis and the presence of multiple (two) hairs emerging from a single follicle in treated eyes.
• Electron microscopy showed prominent nucleoli and melanin granules within cortical cells (Cx) and a heavily keratinized Henle's layer.

Conclusions:

• Bimatoprost induces not only increased eyelash length, thickness, and pigmentation but also a higher density of stronger, more robust eyelashes.
• These changes, observed within one month, suggest bimatoprost's potential as a prophylactic agent against chemotherapy-induced madarosis (eyelash loss).
• Further research is warranted to explore bimatoprost's role in preventing chemotherapy-related eyelash shedding.