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Immune response in orbit
01
Overview
The term 'Immune response in orbit' encompasses two distinct concepts: the immunological processes occurring within the orbital region of the eye and the altered immune function observed during spaceflight in microgravity conditions. In the ocular orbit, the immune system protects the eye from infection and regulates healing, involving lymphoid tissue, local immune responses in the conjunctiva and lacrimal gland, and potential involvement in systemic immune diseases. A key condition is Nonspecific Orbital Inflammation (NSOI), an immune-mediated inflammatory process. In the context of space, microgravity significantly alters human immune function, leading to heightened inflammatory responses, reduced T cell tolerance, disrupted antigen processing, and increased susceptibility to infection, often influenced by gut microbiota.
- Other names
- Ocular orbital immune responseImmune function in microgravityImmune system in spaceImmune response in orbital spaceflightOrbital immune system
02
Mechanism of action
Modulation of inflammatory and immune responses, particularly through immunosuppression, to treat conditions like Nonspecific Orbital Inflammation (NSOI).
03
Biological functions
Protection of the eye from infection and regulation of healing processes in the ocular orbital region.Maintenance of local immune response in conjunctival fornices and lacrimal gland.Systemic immune involvement affecting eyelids, lacrimal gland, and orbit.Altered immune function in microgravity environments, including heightened inflammatory responses.Reduced T cell tolerance and impaired T regulatory cell generation/maintenance during spaceflight.Disruption of antigen processing/presentation pathways and MHC-TCR communications in space.Interaction with gut microbiota to influence immune function during microgravity exposure.
04
Disease associations
Involvement in Nonspecific Orbital Inflammation (NSOI)/Orbital Inflammatory Pseudotumor in the ocular orbit.Predisposition to systemic immune diseases affecting the orbital region (e.g., atopic skin diseases, autoimmune diseases, immunodeficiency, lymphoproliferative disorders).Increased host susceptibility to infection in microgravity environments due to immune dysfunction.
05
Safety considerations
Immune dysregulation leading to inflammatory conditions (e.g., NSOI).Increased susceptibility to infections in microgravity environments.Potential for autoimmune reactions due to tissue-specific antigens in ocular orbit.
06
Interacting drugs
Corticosteroids
1 more in the full profile.
07
Biomarkers
Elevated cytokines (interleukin-2, -8, -10, -12, gamma interferon, tumor necrosis factor alpha) in NSOI.Immunoglobulin or specific antibody levels in tears for local ocular immune response.Immunoglobulin-producing cells within ocular tissues.
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