The mechanosensitive channel ELKIN1 regulates cellular adaptations to simulated microgravity

Area of Science:

• Cell Biology
• Space Biology
• Biophysics

Background:

• Human physiological functions extensively alter in microgravity.
• Understanding molecular and cellular mechanisms of these changes remains challenging.

Purpose of the Study:

• Investigate if ELKIN1, a mechanically activated ion channel, regulates cellular and molecular structural changes in simulated microgravity.
• Determine ELKIN1's role in microgravity-induced cellular adaptations.

Main Methods:

• Utilized simulated microgravity models.
• Examined ELKIN1 deletion effects on cellular structure, attachment, focal adhesions, and YAP1 transcription factor.
• Assessed melanoma cell invasion through collagen gels using organotypic spheroids.

Main Results:

• ELKIN1 deletion inhibited simulated microgravity-induced alterations in cellular structure and attachment.
• Cells lacking ELKIN1 showed no changes in focal adhesions or YAP1 redistribution.
• Melanoma cell invasion was reduced in simulated microgravity, dependent on ELKIN1.

Conclusions:

• The force-sensing molecule ELKIN1 modulates molecular and cellular responses to microgravity.
• ELKIN1 is a key player in cellular adaptations to microgravity conditions.
• Findings reveal a molecular mechanism underlying microgravity's impact on cells.