ArticleJournal of molecular neuroscience : MN2026
Nr1d1 Mediates Microglial Inflammatory Activation Induced by Intermittent Hypoxia: A Transcriptomic and Machine Learning Study.
Article in Journal of molecular neuroscience : MN, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Obstructive sleep apnea is characterized by recurrent intermittent hypoxia (IH), which contributes to neuroinflammation and neurological dysfunction. Microglia are pivotal regulators of inflammatory responses in the central nervous system, but the molecular mechanisms underlying IH-induced microglial activation remain unclear. This study aimed to identify key genes mediating this phenomenon and to elucidate their functional significance. An IH model was established in BV2 cells, with inflammation assessed via western blot for cyclooxygenase-2 (COX2) /inducible nitric oxide synthase (iNOS) and ELISA for Interleukin-6 (IL-6) /Tumour necrosis factor-alpha (TNF-α). RNA sequencing was performed to profile transcriptional changes induced by IH. Differential expression analysis, functional enrichment analysis, protein interaction network analysis, transcription factor prediction, and machine learning-based screening were integrated to identify candidate key genes. Pharmacological modulation of Nr1d1 was then performed to evaluate its role in IH-induced inflammation. IH significantly increased COX2, iNOS, IL-6 and TNF-α levels in BV2 cells. Transcriptomics showed distinct profiles between control and IH groups. Enrichment analyses linked IH-related genes to immune regulation, stress responses, and metabolic pathways. Network analysis highlighted a circadian gene cluster as a prominent component of the IH-responsive transcriptional network. Integrated network and machine learning analyses further identified Nr1d1 as a key candidate. Pharmacological experiments showed that inhibition of Nr1d1 attenuated IH-induced inflammatory responses. IH induces pronounced inflammatory activation and transcriptional reprogramming in BV2 cells. Nr1d1 may represent a circadian-associated candidate regulator involved in IH-induced microglial inflammatory activation.
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