Effects of simulated microgravity on human brain nervous tissue

Area of Science:

• Neuroscience
• Space Biology
• Cell Biology

Background:

• Spaceflight poses significant risks to astronaut health, particularly affecting the nervous system.
• Understanding microgravity's impact on neural tissues is crucial for mitigating these risks.

Purpose of the Study:

• To investigate the effects of simulated microgravity on human nervous tissue.
• To analyze morphological and cytoskeletal changes in glioma-derived neural cells under simulated microgravity.

Main Methods:

• Cultured glioma tissue blocks and primary cells.
• Exposed cultures to simulated microgravity using rotary processing for up to 14 days.
• Assessed cell morphology, adhesion, migration, and cytoskeleton (β-tubulin) distribution via microscopy and immunofluorescence.

Main Results:

• Extended simulated microgravity (7-14 days) led to larger cell bodies and decreased adhesion.
• Cell migration distance shortened, and cell arrangement became disorganized.
• Simulated microgravity caused significant disorganization of β-tubulin cytoskeleton and increased cell apoptosis.

Conclusions:

• Simulated microgravity significantly alters nervous tissue morphology and cytoskeleton organization.
• These alterations are potential contributors to increased apoptosis observed in neural cells.
• Findings highlight the need for countermeasures against microgravity-induced neurological damage.