时间标签：数据日期 2026-10-31 · 生成时间 2026-11-01 05:30（Asia/Shanghai）｜ 检索窗口 PubMed edat 2026/10/28–2026/10/31 ｜ 情报发生日期 2026-10-31
研究问题
Although the neurodevelopmental consequences of UBE3A loss have been extensively studied, how UBE3A dysfunction contributes to metabolic abnormalities remains incompletely understood.；We hypothesized that UBE3A controls hypothalamic metabolic homeostasis through post‐translational regulation of factors that integrate stress and nutrient signals.；Given that UBE3A has been shown to interact with transcriptional coactivators and chromatin remodelers [], we hypothesized that it could link ER proteostasis with epigenetic control of stress‐responsive gene expression in neurons.
方法
When the interaction was not statistically significant, the interaction term was omitted, and lean mass‐adjusted group differences were assessed using a common‐slope ANCOVA model by comparing regression elevations, as previously described [].；Total RNA was extracted from brown adipose tissue (BAT) using TRIzol reagent (Invitrogen), followed by reverse transcription into cDNA using an RT‐PCR kit (210212, Qiagen).；Quantitative RT‐PCR was carried out with SYBR Green qPCR Premix (RT500U, Enzynomics) using a Bio‐Rad real‐time PCR detection system.；Sections were then incubated for 1 h at room temperature in blocking buffer containing 1 M Tris‐HCl (pH 7.5), 5 M NaCl, and 4% BSA, followed by overnight incubation at 4°C with anti‐DIG‐alkaline phosphatase (AP) antibody (11093274910, Roche, 1:5000 dilution) in blocking buffer containing 2% BSA.
核心结论
These findings establish that UBE3A is expressed in neuronal populations involved in the regulation of feeding behavior and systemic metabolism.；Hypothalamic UBE3A protein levels were markedly reduced in wild‐type (WT) mice fed a high‐fat diet (HFD), with a pronounced decrease in the ARC (Figure ).；Acute changes in nutritional state also affected UBE3A abundance: fasting reduced hypothalamic UBE3A protein levels, whereas refeeding increased them relative to the fasted state, although they remained below those observed in the fed state (Figure ). ‖ 结论：In conclusion, our findings support a model in which UBE3A‐dependent proteostatic control of UTX contributes to H3K27me3 maintenance and ER stress‐responsive transcriptional regulation in hypothalamic neurons.
局限
The increase in POMC expression following chemogenetic inhibition of AgRP neurons further supports a role for AgRP neuronal regulation in the POMC‐related changes observed in Ube3a AKO mice, although it does not establish increased AgRP neuronal activity following Ube3a loss.；GSK‐J4 inhibits multiple KDM6‐family demethylases, including JMJD3/KDM6B, and was administered systemically; thus, effects mediated by other KDM6‐family members, peripheral tissues, or additional targets cannot be excluded.；Although systemic GSK‐J4 has been reported to increase hypothalamic H3K27me3 [], future studies combining intracerebroventricular or ARC‐targeted delivery, food‐intake‐matched controls, and UTX‐selec
对本项目的价值
★☆☆☆☆ 营养感知与自噬轴决定「干预窗口 + 剂量方案」，是组合疗法的时间锚。
全文来源
PMC JATS 全文（正文 61,502 字符，已过标题/DOI 逐字归属校验）
原文题录
- 英文标题：A UBE3A-UTX Proteostasis-Epigenetic Axis Governs Hypothalamic Energy Homeostasis.
- 期刊与标识：Adv Sci (Weinh) · PMID 42958748 · DOI 10.1002/advs.78567
B 级证据分级：B 级（同行评议临床前研究，主要为动物模型）
本文核心结论来自动物模型或体外细胞学，属临床前证据，不能外推至人体。「延长健康寿命」「改善功能」等表述在小鼠中的意义，与人类临床结局之间仍有距离。
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