Welcome to the next episode of the WOrM Podcast 🪱🚀Today, we are looking at NemaCapsules: a new microfluidic system designed to study how host genetics and the gut microbiome influence C. elegans health during spaceflight.The challenge is simple: how do you keep worms alive, fed, contained and ready to image on the International Space Station without creating more work for astronauts?⸻💊 Enter NemaCapsulesNemaCapsules are sealed, gas-permeable biocells containing microfluidic chambers for long-term worm culture.Each unit provides:• passive feeding• controlled microbiome conditions• minimal crew intervention• repeated video imaging• separate chambers for crawling and swimmingThe system creates a miniature, self-contained worm laboratory suitable for future spaceflight experiments. ⸻🏊 Crawling versus swimmingThe crawling chamber contains closely spaced micropillars that support normal crawling.The swimming chamber uses a wider pillar arrangement, allowing worms to thrash through liquid.This proved important because swimming often revealed differences between host–microbiome conditions that were less obvious from crawling alone.⸻🦠 Testing the microbiomeThe researchers tested three microbial conditions:• standard laboratory E. coli OP50• a simplified three-member microbiome• BIGbiome, a 63-member community representing the natural C. elegans microbiomeThey also tested four worm backgrounds:• wild-type N2• daf-16 mutants• ED3017• JU1400This allowed them to examine the combined effects of microbiome, host genetics and ageing.⸻🧬 The host mattersMost strains remained viable across the different microbiomes.The exception was daf-16.These mutants showed rapid declines in survival and movement after day seven, consistent with the established role of DAF-16/FOXO in stress resistance and longevity.The platform therefore detected a genuine biological vulnerability rather than simply maintaining every condition equally.⸻⚡ The microbiome changed movementThe multi-member microbiomes frequently improved crawling and swimming compared with OP50 alone.However, the strength of this effect depended on the worm strain.That is the key point:the microbiome does not act independently of the host genome.⸻🔬 Why this mattersThis study is primarily about building the hardware needed to perform controlled host–microbiome experiments in space.NemaCapsules combine:• long-term culture• passive feeding• controlled microbial communities• host genetic diversity• repeated whole-animal phenotypingThese experiments were conducted on Earth to validate the platform ahead of future International Space Station studies.⸻🧠 The take-home messageSpaceflight biology is not just about sending organisms into orbit.It is about creating systems that can produce reliable biology once they arrive.NemaCapsules offer a way to study how:spaceflight × microbiome × host geneticscombine to shape whole-animal health.⸻📄 Paper discussedBushra Rahman; Atiyya P. Saroyia; Dana Blackburn; Audrey J. Parish; Nathaniel Szewczyk; Monica Driscoll; Buck S. Samuel; Siva A. Vanapalli. (2026)NemaCapsules: Microfluidics-Integrated Biocells for Investigating C. elegans Host-Microbiome Interactions in Spaceflightnpj MicrogravityDOI: 10.1038/s41526-026-00634-9⸻If you enjoyed this episode, please like, follow and subscribe wherever you listen to the WOrM Podcast ⭐🎧This podcast is generated with artificial intelligence and curated by Veeren. If you would like your publication or product featured on the show, please get in touch.🔗 www.veerenchauhan.com📧 [email protected]

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