A simple dissection method for the isolation of mouse trabecular meshwork cells.

Area of Science:

• Ophthalmology
• Cell Biology
• Glaucoma Research

Background:

• The trabecular meshwork (TM) is crucial for regulating intraocular pressure and is implicated in glaucoma pathogenesis.
• Current methods for isolating mouse TM cells are technically demanding and complex, limiting their widespread use in research.
• A simplified, cost-effective isolation strategy is needed to advance in vitro studies of TM cell function.

Purpose of the Study:

• To develop and validate a straightforward, inexpensive, and reproducible method for isolating trabecular meshwork (TM) cells from mouse eyes.
• To establish a reliable source of TM cells for in vitro research, facilitating glaucoma studies.
• To overcome the limitations of existing, dexterity-intensive isolation techniques.

Main Methods:

• Enucleated mouse eyes were dissected to isolate the cornea/TM stripe.
• The cornea/TM stripe was cultured, allowing pigmented cells to outgrow.
• Immunocytochemistry and mRNA expression analysis confirmed TM cell markers; phagocytic properties were assessed using fluorescent microspheres.

Main Results:

• Pigmented, phagocytic cells expressing TM markers (Collagen IV, Fibronectin1, Vimentin, Actin alpha 2) were successfully isolated within 4-7 days.
• Cells demonstrated phagocytic capabilities and responded to TGFB2 and Dexamethasone treatments, consistent with TM cell behavior.
• The method proved effective for both pigmented and albino mice.

Conclusions:

• The described dissection-based method provides an inexpensive and reproducible means to isolate functional mouse TM cells.
• This technique simplifies TM cell acquisition for in vitro research, supporting advancements in glaucoma understanding.
• The isolated cells exhibit characteristic TM cell markers and phagocytic activity, validating the method's efficacy.