Sex stratified neuronal cultures to study ischemic cell death pathways

Area of Science:

• Neuroscience
• Developmental Biology
• Cell Biology

Background:

• Sex differences in neuronal vulnerability to ischemic injury and neurodegenerative diseases are known but poorly understood.
• Current research often uses mixed-sex neuronal cultures, potentially obscuring sex-specific mechanisms.
• Rodent models show sex-based differences in response to ischemic injury, with males experiencing greater damage.

Purpose of the Study:

• To present a protocol for preparing sex-stratified primary neuronal cultures.
• To enable investigation of sex-specific signaling pathways in neuronal injury and disease.
• To address the limitations of using mixed-sex cultures in neuroscience research.

Main Methods:

• Embryonic mice are sexed prior to brain tissue harvesting.
• Hippocampal and cortical tissues from male and female embryos are dissociated and cultured separately.
• The protocol details the preparation of sex-stratified primary dissociated embryonic neuronal cultures.

Main Results:

• The Herson Lab successfully prepared sex-stratified neuronal cultures from hippocampus and cortex.
• This method facilitated the discovery of a male-specific role for the TRPM2 ion channel in ischemic cell death.
• The protocol allows for the study of sex as a critical determinant in neuronal outcomes.

Conclusions:

• Sex-stratified neuronal cultures are crucial for accurately investigating sex differences in neuronal injury.
• The developed protocol provides a valuable tool for neuroscience research, enabling sex-specific analyses.
• This method can be adapted for various studies where biological sex may influence experimental results.