May the Force Be with You (Or Not): The Immune System under Microgravity

Area of Science:

• Space biology
• Immunology
• Cellular biology

Background:

• Terrestrial organisms are adapted to Earth's gravity.
• Increased crewed space flights necessitate understanding microgravity's effects.
• Microgravity exposure causes pathological conditions, notably immune system impairment.

Purpose of the Study:

• To review the effects of microgravity on cellular aspects of the immune system.
• To address the knowledge gap concerning immune impairment at the cellular level in space.
• To highlight significant research from the past decade.

Main Methods:

• Literature review of studies over the past 10 years.
• Focus on research detailing microgravity's impact on cellular immunity.
• Synthesis of findings on immune cell function under simulated or actual microgravity.

Main Results:

• Microgravity significantly affects various immune cell types and functions.
• Specific cellular pathways and mechanisms of immune suppression in microgravity are identified.
• Evidence points to alterations in immune cell signaling and response.

Conclusions:

• Understanding cellular immune responses to microgravity is crucial for astronaut health.
• Further research is needed to fully elucidate spaceflight-induced immune dysfunction.
• This review provides a foundation for developing countermeasures against immune impairment in space.