Journal of Nutritional Biochemistry最新文献

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Gut microbiota, dietary taurine, and fiber shift taurine homeostasis in adipose tissue of calorie-restricted mice to impact fat loss 肠道微生物群、膳食牛磺酸和纤维改变了热量限制小鼠脂肪组织中的牛磺酸平衡,从而影响了脂肪的减少。
IF 4.8 2区 医学
Journal of Nutritional Biochemistry Pub Date : 2024-08-03 DOI: 10.1016/j.jnutbio.2024.109720
{"title":"Gut microbiota, dietary taurine, and fiber shift taurine homeostasis in adipose tissue of calorie-restricted mice to impact fat loss","authors":"","doi":"10.1016/j.jnutbio.2024.109720","DOIUrl":"10.1016/j.jnutbio.2024.109720","url":null,"abstract":"<div><p>Previously, we demonstrated that caloric restriction (CR) stimulates the synthesis, conjugation, secretion, and deconjugation of taurine and bile acids in the intestine, as well as their reuptake. Given taurine's potent antiobesogenic properties, this study aimed to assess whether the CR-induced shift in taurine homeostasis contributes to adipose tissue loss. To verify that, male C57Bl/6 mice were subjected to 20% CR or <em>ad libitum</em> feeding, with variations in cage bedding and gut microbiota conditions. Additional groups received taurine supplementation or were fed a low-taurine diet (LTD). The results showed that in CR animals, taurine derived from the intestine was preferentially trafficked to epididymal white adipose tissue (eWAT) over other tested organs. Besides increased levels of taurine transporter TauT, gene expression of Cysteine dioxygenase (<em>Cdo</em>) involved in taurine synthesis was upregulated in CR eWAT. Taurine concentration in adipocytes was inversely correlated with fat pad weight of CR mice. Different types of cage bedding did not impact eWAT taurine levels; however, the lack of bedding and consumption of a diet high in soluble fiber did. Depleting gut microbiota with antibiotics or inhibiting bile salt hydrolase (BSH) activity reduced WAT taurine concentration in CR mice. Taurine supplementation increased taurine levels in WAT and brown adipose tissue (BAT), promoting fat loss in CR animals. LTD consumption blunted WAT loss in CR animals, with negligible impact on BAT. This study provides multiple insights into taurine's role in CR-triggered fat loss and describes a novel communication path between the liver, gut, microbiota, and WAT, with taurine acting as a messenger.</p></div>","PeriodicalId":16618,"journal":{"name":"Journal of Nutritional Biochemistry","volume":null,"pages":null},"PeriodicalIF":4.8,"publicationDate":"2024-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0955286324001529/pdfft?md5=f943ae50e0aa9ee4d050d5e780fc9c67&pid=1-s2.0-S0955286324001529-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141893674","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Hepatic miR-363 promotes nonalcoholic fatty liver disease by suppressing INSIG1 肝脏 miR-363 通过抑制 INSIG1 促进非酒精性脂肪肝的发生。
IF 4.8 2区 医学
Journal of Nutritional Biochemistry Pub Date : 2024-08-03 DOI: 10.1016/j.jnutbio.2024.109717
{"title":"Hepatic miR-363 promotes nonalcoholic fatty liver disease by suppressing INSIG1","authors":"","doi":"10.1016/j.jnutbio.2024.109717","DOIUrl":"10.1016/j.jnutbio.2024.109717","url":null,"abstract":"<div><p>Nonalcoholic fatty liver disease (NAFLD) constitutes one of major worldwide health problem which typically progressively results in nonalcoholic steatohepatitis (NASH) and eventually cirrhosis and liver cancer. Liver-specific deletion of INSIG1 promotes SREBP1 nuclear translocation to activate downstream lipogenic genes expression, leading to lipid accumulation. However, the underlying pathogenesis of NAFLD, and particularly involved in miRNA participation are still to be thoroughly explored. Here, we found that miR-363-3p was significantly overexpressed in high-fat, high-cholesterol (HFHC) diet mice liver tissue and fatty acid-induced steatosis cells. miR-363-3p directly targets INSIG1 to inhibit its expression, thereby facilitating the cleavage of SREBP and nuclear translocation to activate subsequent transcription of lipogenic genes <em>in vitro</em> and <em>in vivo</em>. In addition, we identified apigenin, a natural flavonoid compound, inhibited miR-363-3p expression to up-regulate INSIG1 and suppress nuclear translocation of SREBP1, thereby down-regulated lipogenic genes expression in steatosis cells and HFHC diet mice liver tissues. Taken together, our results demonstrated that miR-363-3p as a key regulator of hepatic lipid homeostasis targeted INSIG1, and apigenin alleviated NAFLD through the miR-363-3p/INSIG1/SREBP1 pathway. This indicates that reduction of miR-363-3p levels as a possible treatment of hepatic steatosis and provides a potential new therapeutic strategy for targeting miRNA to ameliorate NAFLD.</p></div>","PeriodicalId":16618,"journal":{"name":"Journal of Nutritional Biochemistry","volume":null,"pages":null},"PeriodicalIF":4.8,"publicationDate":"2024-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141893686","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The protective effect of dulcitol on lipopolysaccharide-induced intestinal injury in piglets: mechanistic insights 杜冷丁对脂多糖诱发的仔猪肠道损伤的保护作用:机理研究。
IF 4.8 2区 医学
Journal of Nutritional Biochemistry Pub Date : 2024-08-03 DOI: 10.1016/j.jnutbio.2024.109719
{"title":"The protective effect of dulcitol on lipopolysaccharide-induced intestinal injury in piglets: mechanistic insights","authors":"","doi":"10.1016/j.jnutbio.2024.109719","DOIUrl":"10.1016/j.jnutbio.2024.109719","url":null,"abstract":"<div><p>This study investigated the protective effect of dulcitol on LPS-induced intestinal injury in piglets and explored the underlying molecular mechanisms. A total of 108 piglets were divided into three groups: CON, LPS, and DUL. The CON and LPS groups were fed a basal diet, the DUL group was fed a diet supplementation with 500 mg/kg dulcitol. On day 29, 6 piglets in the LPS and DUL groups were injected with 100 μg/kg BW of LPS. At 4 h postchallenge, all pigs were slaughtered, and colonic samples were collected. Results showed that dulcitol supplementation boosted intestinal barrier function in LPS-challenged piglets by enhancing intestinal morphology and integrity, and increasing the gene expression of <em>zonula occludens-1, claudin-1</em>, and <em>occludin</em> in the colonic mucosa (<em>P</em> &lt;0.05). Metabolomics showed DUL supplementation mainly increased (<em>P</em> &lt;0.05) the metabolites related to steroid and vitamin metabolism (Cholesterol and Vitamin C). Proteomics showed that dulcitol supplementation altered the protein expression involved in maintaining barrier integrity (FN1, CADM1, and PARD3), inhibiting inflammatory response (SLP1, SFN, and IRF3), and apoptosis (including FAS, ING1, BTK, MTHFR, NOX, and P53BP2) in LPS-challenged piglets (<em>P</em> &lt;0.05). Additionally, dulcitol addition also suppressed the TLR4/NF-κB signaling pathway and apoptosis in mRNA and protein levels. Dulcitol increased the abundance of short-chain fatty acid-producing bacteria (<em>Lactobacillus, Blautia</em>, and <em>Faecalibacterium)</em> at the genus level, but decreased the relative abundance of <em>Proteobacteria</em> at the phylum level and <em>Pseudomonas</em> and <em>Delftia</em> at the genus level in piglets (<em>P</em>&lt;.05). In conclusion, these results suggested that the addition of dulcitol alleviated LPS-induced intestinal barrier injury in piglets, probably by maintaining its integrity, inhibiting the TLR4/NF-κB signaling pathways and apoptosis, and modulating the gut microbiota. Therefore, dulcitol can be considered a potential dietary additive for improving intestinal health in pig models.</p></div>","PeriodicalId":16618,"journal":{"name":"Journal of Nutritional Biochemistry","volume":null,"pages":null},"PeriodicalIF":4.8,"publicationDate":"2024-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141893688","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The effects of nonsoy legumes consumption on serum levels of inflammatory biomarkers and Adiponectin in overweight/obese adults: A systematic review and meta-analysis of randomized controlled trials 食用非大豆豆类对超重/肥胖成年人血清中炎症生物标志物和脂肪连接蛋白水平的影响:随机对照试验的系统回顾和荟萃分析。
IF 4.8 2区 医学
Journal of Nutritional Biochemistry Pub Date : 2024-08-03 DOI: 10.1016/j.jnutbio.2024.109718
{"title":"The effects of nonsoy legumes consumption on serum levels of inflammatory biomarkers and Adiponectin in overweight/obese adults: A systematic review and meta-analysis of randomized controlled trials","authors":"","doi":"10.1016/j.jnutbio.2024.109718","DOIUrl":"10.1016/j.jnutbio.2024.109718","url":null,"abstract":"<div><p>Nonsoy legumes offer many health benefits, including improved arterial function, reduced cholesterol levels, and better management of cardiovascular diseases and type 2 diabetes. This systematic review and meta-analysis aim to clarify the inconclusive findings from randomized controlled trials (RCTs) by comprehensively evaluating the effects of nonsoy legumes consumption on serum levels of inflammatory biomarkers and Adiponectin. The search encompassed databases up to January 2024, including PubMed, EMBASE, MEDLINE, Scopus, Web of Science, and Cochrane CENTRAL to retrieve all RCTs examining the effects of nonsoy legumes on inflammatory biomarkers or Adiponectin. The effect sizes quantified as mean differences (MD) and standard deviations (SD) of outcomes, and an overall effect estimate was derived using a random-effects model. RCTs examining serum levels of C-reactive protein (CRP), Interleukin-6 (IL-6), Tumor Necrosis Factor-alpha (TNF-α), Interleukin-1β (IL-1β), and Adiponectin were included in the final meta-analysis. Results revealed that consumption of nonsoy legumes increased Adiponectin serum levels (<em>P</em>=.0017) and reduced IL-1β serum levels (<em>P</em>&lt;.0001). However, it may not significantly affect CRP (<em>P</em>=.2951), IL-6 (<em>P</em>=.2286), and TNF-α (<em>P</em>=.6661) levels. Subgroup analyses showed that nonsoy legumes consumption significantly decreased TNF-α serum levels in studies involving healthy participants. Additionally, sensitivity analysis using the leave-one-out method suggested a potential significant reduction in serum levels of IL-6. This study indicates that consuming nonsoy legumes can increase levels of Adiponectin and decrease serum levels of IL-1β in overweight or obese adults.</p></div>","PeriodicalId":16618,"journal":{"name":"Journal of Nutritional Biochemistry","volume":null,"pages":null},"PeriodicalIF":4.8,"publicationDate":"2024-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0955286324001505/pdfft?md5=95b849576715ce387b073181d42796cb&pid=1-s2.0-S0955286324001505-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141893687","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Dietary modulation of microRNAs in insulin resistance and type 2 diabetes 胰岛素抵抗和 2 型糖尿病中微小核糖核酸的饮食调节。
IF 4.8 2区 医学
Journal of Nutritional Biochemistry Pub Date : 2024-08-02 DOI: 10.1016/j.jnutbio.2024.109714
{"title":"Dietary modulation of microRNAs in insulin resistance and type 2 diabetes","authors":"","doi":"10.1016/j.jnutbio.2024.109714","DOIUrl":"10.1016/j.jnutbio.2024.109714","url":null,"abstract":"<div><p>The prevalence of type 2 diabetes is increasing worldwide. Various molecular mechanisms have been proposed to interfere with the insulin signaling pathway. Recent advances in proteomics and genomics indicate that one such mechanism involves the post-transcriptional regulation of insulin signaling by microRNA (miRNA). These noncoding RNAs typically induce messenger RNA (mRNA) degradation or translational repression by interacting with the 3′ untranslated region (3′UTR) of target mRNA. Dietary components and patterns, which can either enhance or impair the insulin signaling pathway, have been found to regulate miRNA expression in both <em>in vitro</em> and <em>in vivo</em> studies. This review provides an overview of the current knowledge of how dietary components influence the expression of miRNAs related to the control of the insulin signaling pathway and discusses the potential application of these findings in precision nutrition.</p></div>","PeriodicalId":16618,"journal":{"name":"Journal of Nutritional Biochemistry","volume":null,"pages":null},"PeriodicalIF":4.8,"publicationDate":"2024-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141889528","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Corrigendum to “Genistein attenuates memory impairment in Alzheimer's disease via ERS-mediated apoptotic pathway in vivo and in vitro” [The Journal of Nutritional Biochemistry Volume 109 (2022) 109118] 对 "染料木素通过 ERS 介导的体内和体外凋亡途径减轻阿尔茨海默病的记忆损伤 "的更正[《营养生物化学杂志》第 109 卷(2022 年)109118]。
IF 4.8 2区 医学
Journal of Nutritional Biochemistry Pub Date : 2024-08-01 DOI: 10.1016/j.jnutbio.2024.109710
{"title":"Corrigendum to “Genistein attenuates memory impairment in Alzheimer's disease via ERS-mediated apoptotic pathway in vivo and in vitro” [The Journal of Nutritional Biochemistry Volume 109 (2022) 109118]","authors":"","doi":"10.1016/j.jnutbio.2024.109710","DOIUrl":"10.1016/j.jnutbio.2024.109710","url":null,"abstract":"","PeriodicalId":16618,"journal":{"name":"Journal of Nutritional Biochemistry","volume":null,"pages":null},"PeriodicalIF":4.8,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0955286324001438/pdfft?md5=0980d1fc46a69061a69ea5e2a58930c4&pid=1-s2.0-S0955286324001438-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141878844","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Nobiletin promotes lipolysis of white adipose tissue in a circadian clock-dependent manner 金钗素以昼夜节律依赖的方式促进白色脂肪组织的脂肪分解。
IF 4.8 2区 医学
Journal of Nutritional Biochemistry Pub Date : 2024-08-01 DOI: 10.1016/j.jnutbio.2024.109696
{"title":"Nobiletin promotes lipolysis of white adipose tissue in a circadian clock-dependent manner","authors":"","doi":"10.1016/j.jnutbio.2024.109696","DOIUrl":"10.1016/j.jnutbio.2024.109696","url":null,"abstract":"<div><p>Nobiletin has been reported to protect against obesity-related metabolic disorders by enhancing the circadian rhythm; however its effects on lipid metabolism in adipose tissue are unclear. In this study, mice were fed with high-fat diet (HFD) for four weeks firstly and gavaged with 50 or 200 mg/kg bodyweight/day nobiletin at Zeitgeber time (ZT) 4 for another four weeks while still receiving HFD. At the end of the 8-week experimental period, the mice were sacrificed at ZT4 or ZT8 on the same day. Mature 3T3-L1 adipocytes were treated with nobiletin in the presence or absence of si<em>Bmal1</em>, si<em>Rora</em>, si<em>Rorc</em>, SR8278 or SR9009. Nobiletin reduced the weight of white adipose tissue (WAT) and the size of adipocytes in WAT. At ZT4, nobiletin decreased the TG, TC and LDL-c levels and increased serum FFA level and glucose tolerance. Nobiletin triggered the lipolysis of mesenteric and epididymal WAT at both ZT4 and ZT16. Nobiletin increased the level of RORγ at ZT16, that of BMAL1 and PPARγ at ZT4, and that of ATGL at both ZT4 and ZT16. Nobiletin increased lipolysis and ATGL levels in 3T3-L1 adipocytes in <em>Bmal1-</em> or <em>Rora/c-</em> dependent manner. Dual luciferase assay indicated that nobiletin enhanced the transcriptional activation of RORα/γ on <em>Atgl</em> promoter and decreased the repression of RORα/γ on PPARγ-binding <em>PPRE</em>. Promoter deletion analysis indicated that nobiletin inhibited the suppression of PPARγ-mediated <em>Atgl</em> transcription by RORα/γ. Taken together, nobiletin elevated lipolysis in WAT by increasing ATGL levels through activating the transcriptional activity of RORα/γ and decreasing the repression of RORα/γ on PPARγ-binding <em>PPRE</em>.</p></div>","PeriodicalId":16618,"journal":{"name":"Journal of Nutritional Biochemistry","volume":null,"pages":null},"PeriodicalIF":4.8,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141878845","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Dietary protein affects tissue accumulation of mercury and induces hepatic Phase I and Phase II enzyme expression after co-exposure with methylmercury in mice 小鼠与甲基汞共同暴露后,膳食蛋白质会影响汞的组织积累,并诱导肝脏 I 期和 II 期酶的表达。
IF 4.8 2区 医学
Journal of Nutritional Biochemistry Pub Date : 2024-07-31 DOI: 10.1016/j.jnutbio.2024.109712
{"title":"Dietary protein affects tissue accumulation of mercury and induces hepatic Phase I and Phase II enzyme expression after co-exposure with methylmercury in mice","authors":"","doi":"10.1016/j.jnutbio.2024.109712","DOIUrl":"10.1016/j.jnutbio.2024.109712","url":null,"abstract":"<div><p>Methylmercury (MeHg) is a ubiquitous environmental contaminant, well known for its neurotoxic effects. MeHg can interact with several nutrients in the diet and affect nutrient metabolism, however the interaction between MeHg and dietary proteins has not been thoroughly investigated. Male BALB/c mice were fed diets based on either casein, cod or chicken as protein sources, which were or were not spiked with MeHg (3.5 mg Hg kg<sup>−1</sup>). Following 13 weeks of dietary exposure to MeHg, the animals accumulated mercury in a varying degree depending on the diet, where the levels of mercury were highest in the mice fed casein and MeHg, lower in mice fed cod and MeHg, and lowest in mice fed chicken and MeHg in all tissues assessed. Assessment of gut microbiota revealed differences in microbiota composition based on the different protein sources. However, the introduction of MeHg eliminated this difference. Proteomic profiling of liver tissue uncovered the influence of the dietary protein sources on a range of enzymes related to Phase I and Phase II detoxification mechanisms, suggesting an impact of the diet on MeHg metabolism and excretion. Also, enzymes linked to pathways including methionine and glycine betaine cycling, which in turn impact the production of glutathione, an important MeHg conjugation molecule, were up-regulated in mice fed chicken as dietary protein. Our findings indicate that dietary proteins can affect expression of hepatic enzymes that potentially influence MeHg metabolism and excretion, highlighting the relevance of considering the dietary composition in risk assessment of MeHg through dietary exposure.</p></div>","PeriodicalId":16618,"journal":{"name":"Journal of Nutritional Biochemistry","volume":null,"pages":null},"PeriodicalIF":4.8,"publicationDate":"2024-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0955286324001451/pdfft?md5=7cbbbb9116bb210273943973ae04c1e7&pid=1-s2.0-S0955286324001451-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141878843","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The attenuation of gut microbiota-derived short-chain fatty acids elevates lipid transportation through suppression of the intestinal HDAC3-H3K27ac-PPAR-γ axis in gestational diabetes mellitus 通过抑制妊娠糖尿病患者肠道 HDAC3-H3K27ac-PPAR-γ 轴,减少肠道微生物群衍生的短链脂肪酸可提高脂质运输。
IF 4.8 2区 医学
Journal of Nutritional Biochemistry Pub Date : 2024-07-25 DOI: 10.1016/j.jnutbio.2024.109708
{"title":"The attenuation of gut microbiota-derived short-chain fatty acids elevates lipid transportation through suppression of the intestinal HDAC3-H3K27ac-PPAR-γ axis in gestational diabetes mellitus","authors":"","doi":"10.1016/j.jnutbio.2024.109708","DOIUrl":"10.1016/j.jnutbio.2024.109708","url":null,"abstract":"<div><p>Gut flora is considered to modulate lipid transport from the intestine into the bloodstream, and thus may potentially participate in the development of GDM. Although previous studies have shown that the intestinal microbiota influences lipid transport and metabolism in GDM, the precise mechanisms remain elusive. To address this, we used a high-fat diet (HFD)-induced GDM mouse model and conducted 16s rRNA sequencing and fecal metabolomics to assess gut microbial community shifts and associated metabolite changes. Western blot, ELISA, and chromatin immunoprecipitation (ChIP) were utilized to elucidate how gut microbiota affect intestinal lipid transport and the insulin sensitivity of hepatic, adipose, and skeletal muscle tissues. We found that HFD impaired the oral glucose tolerance test (OGTT) and insulin tolerance test (ITT) in pregnant mice. 16s rRNA sequencing demonstrated profound compositional changes, especially in the relative abundances of <em>Firmicutes</em> and <em>Bacteroidetes</em>. Metabolomics analysis presented a decline in the concentration of short-chain fatty acids (SCFAs) in the GDM group. Western blot analyses showed an upregulation of HDAC3 and a concurrent reduction in H3K27 acetylation in the intestine. ChIP-qPCR showed that PPAR-γ was inhibited, which in turn activated lipid-transporter CD36. ELISA and insulin signaling pathway detection in insulin-target organs showed high concentrations of circulating fatty acids and triglycerides and insulin resistance in insulin-target organs. Our results suggest that gut microbiota is closely associated with the development of GDM, partly because decreased gut flora-associated SCFAs activate CD36 by suppressing the HDAC3-H3K27ac-PPAR-γ axis to transport excessive fatty acids and triglycerides into blood circulation, thereby dysregulating the insulin sensitivity of insulin target organs.</p></div>","PeriodicalId":16618,"journal":{"name":"Journal of Nutritional Biochemistry","volume":null,"pages":null},"PeriodicalIF":4.8,"publicationDate":"2024-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0955286324001414/pdfft?md5=7173d1a691aa25f8ee6ed880a79238c2&pid=1-s2.0-S0955286324001414-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141766375","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Sestrin2 in POMC neurons modulates energy balance and obesity related metabolic disorders via mTOR signaling POMC 神经元中的 Sestrin2 通过 mTOR 信号调节能量平衡和肥胖相关代谢紊乱
IF 4.8 2区 医学
Journal of Nutritional Biochemistry Pub Date : 2024-07-25 DOI: 10.1016/j.jnutbio.2024.109703
{"title":"Sestrin2 in POMC neurons modulates energy balance and obesity related metabolic disorders via mTOR signaling","authors":"","doi":"10.1016/j.jnutbio.2024.109703","DOIUrl":"10.1016/j.jnutbio.2024.109703","url":null,"abstract":"<div><p>Sestrin2 is a highly conserved protein that can be induced under various stress conditions. Researches have revealed that the signaling pathway of the mammalian target of rapamycin (mTOR) is essential in modulating both glucose and lipid metabolism. However, the precise involvement of Sestrin2 in the hypothalamus, particularly in pro-opiomelanocortin (POMC) neurons, in control of energy homeostasis remains uncertain. In this study, we aimed to investigate the functional role of Sestrin2 in hypothalamic POMC neurons in regulation of energy balance, as well as revealing the underlying mechanisms. Therefore, cre-dependent AAV virus encoding or silencing Sestrin2 was injected into the hypothalamic ARC of pomc-cre transgenic mice. The results demonstrated that Sestrin2 overexpression in POMC neurons ameliorated high-fat diet (HFD)-induced obesity and increased energy expenditure. Conversely, Sestrin2 deficiency in POMC neurons predisposed mice to HFD induced obesity. Additionally, the thermogenesis of brown adipose tissue and lipolysis of inguinal white adipose tissue were both enhanced by the increased sympathetic nerve innervation in Sestrin2 overexpressed mice. Further exploration revealed that Sestrin2 overexpression inhibited the mTOR signaling pathway in hypothalamic POMC neurons, which may account for the alleviation of systematic metabolic disturbance induced by HFD in these mice. Collectively, our findings demonstrate that Sestrin2 in POMC neurons plays a pivotal role in maintaining energy balance in a context of HFD-induced obesity by inhibiting the mTOR pathway, providing new insights into how hypothalamic neurons respond to nutritional signals to protect against obesity-associated metabolic dysfunction.</p></div>","PeriodicalId":16618,"journal":{"name":"Journal of Nutritional Biochemistry","volume":null,"pages":null},"PeriodicalIF":4.8,"publicationDate":"2024-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141723788","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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