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Natl. Acad. Sci. U.S.A."],"published-print":{"date-parts":[[2024,10,29]]},"abstract":"<jats:p>\n                    Epidemiological studies show a strong correlation between air pollution and fetal growth restriction (FGR), but existing results are controversial due to inherent limitations, such as causality of specific pollutants, developmental origin, and maternal\u2013fetal transmission. To address this controversy, we first conducted a retrospective analysis of 28,796 newborns and revealed that maternal nitrogen dioxide (NO\n                    <jats:sub>2<\/jats:sub>\n                    ) exposure during the second trimester was positively associated with FGR, with an adjusted odds ratio of 1.075 (95% confidence interval: 1.020-1.133) per 10 \u03bcg\/m\n                    <jats:sup>3<\/jats:sup>\n                    NO\n                    <jats:sub>2<\/jats:sub>\n                    increase for small for gestational age. Then, by establishing an animal model of prenatal NO\n                    <jats:sub>2<\/jats:sub>\n                    exposure, we confirmed its adverse effects on embryonic growth and hematopoiesis in the yolk sac and fetal liver, primarily affecting the differentiation of hematopoietic stem and progenitor cells and erythroid maturation. By applying internal exposure analyses coupled with\n                    <jats:sup>15<\/jats:sup>\n                    N isotope tracing, we found that maternal NO\n                    <jats:sub>2<\/jats:sub>\n                    inhalation induced acquired methemoglobinemia through its byproducts and placental hypoxia in pregnant mice. Importantly, by combining transcriptional profiling, bioinformatics analysis, and RNA binding protein immunoprecipitation (RIP)\/chromatin immunoprecipitation (CHIP), we clarified that placental-fetal hypoxia transmission activated hypoxia-inducible factors, disturbed hematopoiesis through the hypoxia-inducible factor 1\u03b2-long noncoding RNAs-CCAAT\/enhancer binding protein alpha-proinflammatory signaling pathway, ultimately contributing to FGR progression. These findings provide insights for risk prevention and clinical intervention to promote child well-being in NO\n                    <jats:sub>2<\/jats:sub>\n                    -polluted areas.\n                  <\/jats:p>","DOI":"10.1073\/pnas.2409597121","type":"journal-article","created":{"date-parts":[[2024,10,21]],"date-time":"2024-10-21T15:01:33Z","timestamp":1729522893000},"update-policy":"https:\/\/doi.org\/10.1073\/pnas.cm10313","source":"Crossref","is-referenced-by-count":20,"title":["Maternal NO\n                    <sub>2<\/sub>\n                    exposure and fetal growth restriction: Hypoxia transmission and lncRNAs-proinflammation-mediated abnormal hematopoiesis"],"prefix":"10.1073","volume":"121","author":[{"ORCID":"https:\/\/orcid.org\/0009-0000-1072-6102","authenticated-orcid":false,"given":"Liyao","family":"Qin","sequence":"first","affiliation":[{"name":"Department of Environment Science, College of Environment and Resource, Research Center of Environment and 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