Saliva Diagnostics in Spaceflight Virology Studies-A Review

Area of Science:

• Biomedical research
• Space medicine
• Clinical diagnostics

Background:

• Saliva contains numerous biological markers for normal and disease states.
• Traditional sample collection methods can be invasive and time-consuming.
• Saliva offers a non-invasive, cost-effective, and easily collected alternative.

Purpose of the Study:

• To review the utility of saliva as a biomarker-rich biofluid in spaceflight research.
• To highlight the advantages and disadvantages of using saliva in clinical diagnostics.
• To summarize lessons learned from two decades of saliva utilization in space missions.

Main Methods:

• Analysis of saliva (wet and dry matrices) from astronauts on short- and long-duration space missions.
• Extension of saliva use to space analog studies (bed rest, Antarctica, closed chambers).
• Review of existing literature and practical experience with saliva collection and analysis.

Main Results:

• Saliva collection is non-invasive, rapid, and cost-effective, requiring minimal specialized equipment.
• Dry saliva matrices can be processed at room temperature, simplifying logistics.
• Saliva analysis has been successfully applied to viral, stress, and immunological studies in space and analog environments.

Conclusions:

• Saliva is an ideal biofluid for clinical studies, enabling diagnosis and monitoring in diverse settings, including remote and disaster areas.
• Its accessibility and biomarker richness support large-scale public health screenings and early disease detection.
• Further research and standardization can enhance saliva's role in improving patient outcomes and healthcare accessibility.