Cell cycle and HIF-1 related gene expression alteration in thyroid cell lines under microgravity

Area of Science:

• Space biology
• Cancer research
• Genomics

Background:

• Understanding microgravity's impact on human health is vital for space exploration.
• This study investigates gene expression and cell behavior in thyroid-related cell lines under simulated microgravity.

Purpose of the Study:

• To analyze gene expression changes in thyroid cells exposed to simulated microgravity.
• To assess the impact of simulated microgravity on thyroid cancer cell migration and invasion.

Main Methods:

• Five thyroid cell lines were cultured under simulated microgravity (10^-3 g) using a clinostat.
• Gene expression was analyzed via cDNA microarray, and cell aggressiveness was assessed using Transwell assays.

Main Results:

• Simulated microgravity induced distinct gene expression profiles across cell lines, with significant differentially expressed genes (DEGs) observed.
• Papillary thyroid cancer cells showed upregulated G2-M phase genes, while other cell types exhibited altered innate immune and HIF-1α signaling pathways.
• Enhanced migration and invasion capabilities were noted in specific thyroid cancer cell lines under simulated microgravity.

Conclusions:

• Simulated microgravity significantly influences thyroid cell gene expression and aggressiveness.
• These findings highlight the potential impact of microgravity on cancer biology, relevant for long-term space missions and human health.