Wenxuan Li, Yanping Pei, Junteng Wang, Jiayi Zhang, Wenyuan Zhang, Xiaoyu Jiang, Qingxu Zhao, Hui Liu, Hang Xiao, Dapeng Li
{"title":"Quercetin Ameliorates Cognitive Impairment in Obese Mice by Activating the PI3K/AKT/GSK3β Signaling Pathway via the Microbiota–Gut–Brain Axis","authors":"Wenxuan Li, Yanping Pei, Junteng Wang, Jiayi Zhang, Wenyuan Zhang, Xiaoyu Jiang, Qingxu Zhao, Hui Liu, Hang Xiao, Dapeng Li","doi":"10.1021/acs.jafc.6c04686","DOIUrl":"10.1021/acs.jafc.6c04686","url":null,"abstract":"<p>Obesity and its associated insulin resistance are importantriskfactors for cognitive impairment. In this study, a 10-week C57BL/6mouse model was established to investigate the effects of dietaryquercetin supplementation at 0.05% (w/w) on HFFD-induced obesity-relatedcognitive impairment. The results showed that quercetin significantlyreduced HFFD-induced body weight gain (<em>P</em> < 0.05)and improved serum lipid abnormalities and cognitive performance.Integrated multi-omics analysis further revealed that quercetin reshapedthe gut microbiota composition, notably increasing <em>Akkermansia muciniphila</em>, restored intestinal barrierfunction, and regulated serum metabolite profiles. These alterationssubsequently suppressed neuroinflammation, activated the hippocampalPI3K/AKT/GSK3β signaling pathway (with increases of 46%, 49%,and 50% in <em>p</em>-PI3K, <em>p</em>-Akt, and <em>p</em>-GSK-3β expression, respectively), and inhibitedabnormal tau phosphorylation and neuronal apoptosis. The novelty ofthis study lies in constructing an integrated regulatory axis linkingdietary quercetin, gut microbiota, serum metabolites, and hippocampalinsulin signaling, providing novel mechanistic insights into quercetinin neuro-metabolic diseases.</p>","PeriodicalId":41,"journal":{"name":"Journal of Agricultural and Food Chemistry","volume":"74 40","pages":"31601–31615"},"PeriodicalIF":6.7,"publicationDate":"2026-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149091150","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"The FgSdhAF2–FgSdhA Interface as\u0000a Potential Novel Antifungal Target in\u0000 Fusarium graminearum\u0000 : Genetic Characterization and Structure-Based Inhibitor Discovery","authors":"XiuJuan Li,Bin Chen,Wenchan Chen,Wei Wang,Siqi Yao,Hao hu,Shuzhou Liu,Guo Li,Jiawei Li,Xiushi Song,Wenyong Shao,Changjun Chen","doi":"10.1021/acs.jafc.6c11869","DOIUrl":"https://doi.org/10.1021/acs.jafc.6c11869","url":null,"abstract":"Abstract Fusarium graminearum causes Fusarium head blight and threatens cereal production through deoxynivalenol (DON) contamination. The biological role of FgSdhAF2 was characterized, and a potential antifungal pocket adjacent to the FgSdhAF2–FgSdhA interface was identified. Deletion of FgSdhAF2 markedly reduced mycelial growth, conidiation, virulence, DON production, and FgTri5 expression in SDHI-sensitive PH-1 and intrinsically resistant G1. The FgSdhAF2 E159Y substitution similarly reduced mycelial growth, conidiation, and virulence. Using this predicted pocket for structure-based virtual screening, approximately 1.6 million compounds were screened, yielding ten candidates. Compound 156758 inhibited PH-1, G1, and the highly pydiflumetofen-resistant FgSdhC1A83 V mutant, with EC50 values of 3.33–3.59 μg/mL, and reduced DON accumulation by 53.9–55.4%. It also showed broad-spectrum activity against eight additional phytopathogenic fungi. Collectively, these findings support this predicted interface as a potential antifungal target and 156758 as a lead compound for developing fungicides to manage SDHI-resistant F. graminearum populations.","PeriodicalId":41,"journal":{"name":"Journal of Agricultural and Food Chemistry","volume":"32 1","pages":""},"PeriodicalIF":6.1,"publicationDate":"2026-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149210237","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}