Gene Expression Measurement Module (GEMM) for space application: Design and validation. (August 2019)

• Record Type: Journal Article
• Authors: Peyvan, Kianoosh; Karouia, Fathi; Cooper, John J.; Chamberlain, Jeff; Suciu, Dominic; Slota, Michael; Pohorille, Andrew
• Is Part Of: Life sciences in space research. Volume 22(2019)
• Page Start: 55
• Page End: 67
• Publication Date: 2019-08
• Subjects: Gene Expression Measurement Module (GEMM) -- Gene expression -- Automated, miniaturized instruments -- High-throughput biological instruments -- Omics -- biotechnology -- astrobiology -- space biology; Space biology -- Periodicals; 571.0919
• DOI: 10.1016/j.lssr.2019.07.004
• Languages: English
• ISSNs: 2214-5524

Abstract

Highlights: A prototype of a miniaturized, automated instrument for measuring gene expression was developed. The instrument is suitable for deployment on uncrewed platforms in space, e.g. small satellites. Accuracy of measurements based on the instrument is comparable to standard laboratory practices. Abstract: In order to facilitate studies on the impact of the space environment on biological systems, we have developed a prototype of GEMM (Gene Expression Measurement Module) - an automated, miniaturized, integrated fluidic system for in-situ measurements of gene expression in microbial samples. The GEMM instrument is capable of (1) lysing bacterial cell walls, (2) extracting and purifying RNA released from cells, (3) hybridizing the RNA to probes attached to a microarray and (4) providing electrochemical readout, all in a microfluidics cartridge. To function on small, uncrewed spacecraft, the conventional, laboratory protocols for both sample preparation and hybridization required significant modifications. Biological validation of the instrument was carried out on Synechococcus elongatus, a photosynthetic cyanobacterium known for its metabolic diversity and resilience to adverse conditions. It was demonstrated that GEMM yielded reliable, reproducible gene expression profiles. GEMM is the only high throughput instrument that can be deployed in near future on space platforms other than the ISS to advance biological research in space. It can also prove useful for numerous terrestrial applications in the field.