Rustem Ismagilov
California Institute of Technology, CA·Microbiology & Immunology
Microbes living inside human tissues and fluids influence immunity, barrier function and metabolism, yet they are extraordinarily hard to study where they actually reside. In a biopsy or a milk sample, human genetic material can outnumber microbial material a thousand to one, fragile microbial RNA degrades quickly, and reagent contamination can masquerade as a real organism.
- Fields
Microbiology & Immunology
Biomedical Engineering
Chemistry
- Topics
microbiome
metatranscriptomics
metagenomics
- Grants
- 4 known grants, through Jun 2030
What they work on
- Optimize T-BEAM in germ-free tissue spiked with defined bacteria, targeting over 1,000-fold removal of host nucleic acids while preserving bacterial transcriptional profiles and RNA yield.
- Establish detection and quantification limits for T-BEAM in vivo using mice colonized by a single bacterial species and by hCom2, a defined human-derived gut community.
- Apply T-BEAM to biopsies from patients with subclinical perianal Crohn's disease and matched controls to find joint microbial and host expression patterns that predict radiological progression.
- Develop and validate MEM, a microbial enrichment and metagenomic sequencing method, using defined communities and milk-derived isolates to recover whole bacterial, archaeal and fungal genomes while excluding reagent contaminants.
- Apply MEM to repeated paired breast milk and stool samples from full-term and pre-term mother-infant dyads to assess milk microbiome stability and candidate transmission routes.
- Optimize FRAMES using differential lysis, RNase treatment and chemical fixation on vaginal swabs, verifying host RNA depletion and fungal transcript recovery by digital PCR and RNA sequencing.
- Use FRAMES across the menstrual cycle and in a recurrent vulvovaginal candidiasis cohort to identify Candida and human gene-expression signatures that separate benign colonization from disease.
- Create Viral-MEM for particle-independent viral enrichment from host-heavy tissue and Viral StochQuant for absolute, anchored viral quantification, validating both in vaginal swabs, saliva with small-intestine biopsies, and paired lower gastrointestinal biopsies.
More about the research
Four technology projects attack these measurement problems, each pairing a new sample-preparation and sequencing workflow with a human health question that the workflow is designed to answer.
Why it matters
Trustworthy measurements of what microbes are doing inside human tissue could expose targets for diagnostics and therapies in diseases where tissue-associated microbes are suspected but unproven, including inflammatory bowel disease, colorectal cancer, Parkinson's disease and periodontitis. Women with recurrent yeast infections could gain tests that distinguish colonization from disease, and infants, especially pre-term ones at risk of necrotizing enterocolitis and sepsis, could benefit from clearer evidence on milk-borne microbes and probiotic strain choice.
Known grants
From NIH and NSF research grants. Labs often have other funding we can't see.
Bacterial Metatranscriptomics from Human Tissues to Resolve Contributions of Host and Microbial Pathways to Health and Disease
NIH · Aug 2026 – Jun 2030
Technology for Longitudinal Whole-Genome Characterization of Term and Pre-Term Breast Milk Microbiomes
NIH · Aug 2026 – Jul 2028
Viral MEM: Viral Enrichment and Precise Stochastic Quantification with Microbial Context Preservation for Rigorous Virome Analysis of Challenging Human Samples
NIH · Sep 2024 – Jun 2028
Closest labs
June Louise Round
University of Utah, UT·Microbiology & Immunology
Catalog which commensal viruses in stool from healthy humans are bound by mucosal IgA and IgG antibodies, by purifying and sorting antibody-coated DNA and RNA viral particles.
Xin Li
University of Texas Southwestern Medical Center, TX·Microbiology & Immunology·Early-career
Determine how fungal stimulatory RNA (fsRNA), a newly identified fungal RNA, triggers innate immune responses in the intestine, using fungal genetic engineering and long-read RNA sequencing.
Karen Norris
University of Georgia, GA·Microbiology & Immunology
Test whether the NXT-2 vaccine, a lab-made peptide based on a fungal protein shared across species, triggers strong immune responses in nonhuman primates.
The school
California Institute of Technology: 18 labs on PI Pages, $445M a year on research, 200 research doctorates a year.
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