Murine trabecular meshwork cells in tissue culture.

Area of Science:

• Ophthalmology
• Cell Biology
• Immunology

Background:

• Trabecular meshwork (TM) cells are crucial for maintaining intraocular pressure.
• Establishing pure TM cell cultures is vital for studying ocular physiology and disease.
• Previous TM cell culture methods have limitations in purity and scalability.

Purpose of the Study:

• To establish and characterize a pure cell culture of trabecular meshwork cells from an inbred A/J mouse strain.
• To assess the functional properties and molecular markers of cultured mouse TM cells.
• To provide a reliable model for future in vivo and in vitro research on TM cell biology.

Main Methods:

• Excision of cornea and chamber angle tissue from A/J mice within 1 hour of enucleation.
• Establishment of tissue culture and isolation of trabecular meshwork cells by removing other cell types.
• Characterization of TM cells through morphological assessment, passaging, phagocytosis assays, and immunoreactivity testing.

Main Results:

• A distinct morphological type of trabecular meshwork cells was successfully isolated and cultured.
• The cultured TM cells reached confluency in 3-4 weeks and were passaged five times.
• Cells demonstrated active phagocytosis and expressed laminin, collagen type IV, and receptors for acetylated low-density lipoprotein.

Conclusions:

• A method for establishing pure trabecular meshwork cell cultures from inbred mice was developed.
• These cultured mouse TM cells possess key characteristics of native TM cells, including phagocytosis and specific protein expression.
• The availability of this inbred mouse TM cell line facilitates future in vivo functional and immunological studies in a syngeneic system.