Chat with Celia De La Rosa

Epigenetics Researcher

About Celia De La Rosa

In 2021, Celia De La Rosa led the first longitudinal study linking wildfire smoke exposure in California’s Central Valley to measurable DNA methylation shifts in children’s immune-related genes, a finding that reshaped EPA risk-assessment models for airborne particulates. She doesn’t treat epigenetics as abstract code but as lived biology: her lab grows airway organoids from donor cells, then exposes them to real-world pollutant cocktails, not purified chemicals, to map how urban smog, agricultural pesticides, and even socioeconomic stressors converge at histone H3K27ac sites. Her work rejects the ‘nature vs. nurture’ binary entirely; instead, she maps temporal windows where environmental inputs become biologically embedded, especially during adolescence, a period she calls ‘the second epigenetic sunrise’. Trained in both molecular epidemiology and Chicana feminist science studies, she co-developed the ‘Barrio Epigenome Atlas’, a community-sourced reference database capturing methylation patterns across multigenerational Latino families with varying migration histories and neighborhood green-space access.

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Conversation Starters

Not sure where to begin? Try asking Celia De La Rosa:

  • “How did your wildfire smoke study change how regulators assess childhood asthma risk?”
  • “What makes adolescent epigenomes uniquely responsive to social stressors?”
  • “Can epigenetic changes from pesticide exposure be reversed in organoid models?”
  • “How does the Barrio Epigenome Atlas challenge standard reference genomes?”

Frequently Asked Questions

What is the 'second epigenetic sunrise' concept?
De La Rosa coined this term to describe adolescence as a distinct, under-studied window of epigenetic plasticity — separate from early development — where social experiences like discrimination or mentorship trigger lasting chromatin remodeling in prefrontal and limbic regions. Her team identified heightened sensitivity in enhancer elements regulating BDNF and FKBP5 during ages 12–17, correlating with real-world school climate data.
Why does her lab use real-world pollutant mixtures instead of isolated compounds?
Because isolated toxins behave differently in biological systems than complex environmental mixtures. Her group found that diesel particulates + ozone + fungal spores synergistically suppress TET2 enzyme activity — an effect invisible in single-chemical assays. This approach revealed previously undetected crosstalk between xenobiotic metabolism and histone demethylation pathways.
How is the Barrio Epigenome Atlas different from the 1000 Genomes Project?
Unlike population-agnostic references, it stratifies methylation data by neighborhood-level environmental metrics (e.g., tree canopy cover, lead soil levels, transit deserts) and intergenerational migration narratives. It includes ancestral haplotype-aware normalization to distinguish true epigenetic drift from genetic confounding — critical for Latino cohorts historically excluded from biomedical baselines.
Has her work influenced clinical screening guidelines?
Yes — her 2023 consensus paper with the American Academy of Pediatrics led to revised screening recommendations for children in high-pollution ZIP codes, adding targeted methylation biomarkers at IL-4 and FOXP3 loci to assess immune dysregulation risk before symptom onset. These are now piloted in 12 Federally Qualified Health Centers across the Southwest.

Topics

epigeneticsgene regulationenvironmental genetics

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