Primary Astrocytes Purification and Immortalization.

Area of Science:

• Neuroscience
• Cell Biology
• Biotechnology

Background:

• Astrocytes are crucial for central nervous system (CNS) homeostasis and function.
• Primary astrocyte cultures are valuable in vitro models for studying astrocyte biology.
• Existing methods for primary astrocyte isolation and immortalization can be time-consuming or costly.

Purpose of the Study:

• To develop a rapid, cost-effective protocol for purifying primary astrocytes from mouse cortex and spinal cord.
• To establish a method for immortalizing these purified primary astrocytes using lentivirus-mediated SV40 large T antigen expression.
• To validate the utility of the immortalized astrocytes for studying astrocyte-specific markers and functions, such as calcium signaling.

Main Methods:

• Modified immunopanning technique for primary astrocyte purification.
• Lentivirus infection with SV40 large T antigens for astrocyte immortalization.
• Assessment of astrocyte-specific marker expression.
• Measurement of ATP-induced calcium flux in immortalized astrocytes.

Main Results:

• Successful purification of primary astrocytes from mouse CNS tissue.
• Generation of immortalized astrocyte cell lines that retain characteristics of primary astrocytes.
• Demonstrated ability to measure functional responses, including calcium transients, in immortalized astrocytes.
• Protocols ensure that immortalized astrocytes accurately mimic primary astrocyte cell biology in culture.

Conclusions:

• The presented protocols offer efficient methods for primary astrocyte purification and immortalization.
• The resulting immortalized astrocytes serve as robust models for in vitro studies of astrocyte biology and function.
• These methods may be applicable to the immortalization of other primary cell types.