Journal of molecular endocrinology最新文献

筛选
英文 中文
CREB activates the MafA promoter through proximal E-boxes and a CCAAT motif in pancreatic β-cells. 在胰腺β细胞中,CREB 通过近端 E-boxes 和 CCAAT motif 激活 MafA 启动子。
IF 3.6 4区 医学
Journal of molecular endocrinology Pub Date : 2024-10-04 Print Date: 2024-10-01 DOI: 10.1530/JME-24-0023
Yuki Aida, Kohsuke Kataoka
{"title":"CREB activates the MafA promoter through proximal E-boxes and a CCAAT motif in pancreatic β-cells.","authors":"Yuki Aida, Kohsuke Kataoka","doi":"10.1530/JME-24-0023","DOIUrl":"10.1530/JME-24-0023","url":null,"abstract":"<p><p>MafA is a key transcriptional regulator of pancreatic islet β-cell function. Its target genes include those encoding preproinsulin and the glucose transporter Glut2 (Slc2a2); thus, MafA function is essential for glucose-stimulated insulin secretion. Expression levels of MafA are reduced in β-cells of diabetic mouse models and human subjects, suggesting that β-cell dysfunction associated with type 2 diabetes is attributable to the loss of MafA. On the other hand, MafA is transcriptionally upregulated by incretin hormones through activation of CREB and its co-activator CRTC2. β-cell-specific expression of MafA relies on a distal enhancer element. However, the precise mechanism by which CREB-CRTC2 regulates the enhancer and proximal promoter regions of MafA remains unclear. In this report, we analyzed previously published ChIP-seq data and found that CREB and NeuroD1, a β-cell-enriched transactivator, bound to both the promoter and enhancer regions of human MAFA. A series of reporter assays revealed that CREB activated the enhancer through a conserved cAMP-responsive element (CRE) but stimulated MAFA promoter activity even when the putative CRE was deleted. Two E-box elements and a CCAAT motif, which bind NeuroD1 and ubiquitous NF-Y transcription factors, respectively, were necessary for transcriptional activation of the MAFA promoter by CREB. Genome-wide analysis of CREB-bound loci in β-cells revealed that they were enriched with CCAAT motifs. Furthermore, promoter analysis of the Isl1 gene encoding a β-cell-enriched transcription factor revealed that a CRE-like element and two CCAAT motifs, but not the E-box, were necessary for activation by CREB. These results provide clues to elucidate the detailed mechanism by which CREB regulates MafA as well as β-cell-specific genes.</p>","PeriodicalId":16570,"journal":{"name":"Journal of molecular endocrinology","volume":" ","pages":""},"PeriodicalIF":3.6,"publicationDate":"2024-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142073105","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Multiple promoter and enhancer differences likely contribute to augmented G6PC2 expression in human versus mouse pancreatic islet alpha cells. 多种启动子和增强子差异很可能导致 G6PC2 在人与小鼠胰岛α细胞中的表达增强。
IF 3.8 4区 医学
Journal of molecular endocrinology Pub Date : 2024-09-18 Print Date: 2024-10-01 DOI: 10.1530/JME-24-0051
Cyrus C Martin, James K Oeser, Tenzin Wangmo, Brian P Flemming, Alan D Attie, Mark P Keller, Richard M O'Brien
{"title":"Multiple promoter and enhancer differences likely contribute to augmented G6PC2 expression in human versus mouse pancreatic islet alpha cells.","authors":"Cyrus C Martin, James K Oeser, Tenzin Wangmo, Brian P Flemming, Alan D Attie, Mark P Keller, Richard M O'Brien","doi":"10.1530/JME-24-0051","DOIUrl":"10.1530/JME-24-0051","url":null,"abstract":"<p><p>G6PC2 encodes a glucose-6-phosphatase catalytic subunit that opposes the action of glucokinase in pancreatic islets, thereby modulating the sensitivity of insulin and glucagon secretion to glucose. In mice, G6pc2 is expressed at ~20-fold higher levels in β-cells than in α-cells, whereas in humans G6PC2 is expressed at only ~5-fold higher levels in β-cells. We therefore hypothesize that G6PC2 likely influences glucagon secretion to a greater degree in humans. With a view to generating a humanized mouse that recapitulates augmented G6PC2 expression levels in α-cells, we sought to identify the genomic regions that confer differential mouse G6pc2 expression in α-cells versus β-cells as well as the evolutionary changes that have altered this ratio in humans. Studies in islet-derived cell lines suggest that the elevated G6pc2 expression in mouse β-cells versus α-cells is mainly due to a difference in the relative activity of the proximal G6pc2 promoter in these cell types. Similarly, the smaller difference in G6PC2 expression between α-cells and β-cells in humans is potentially explained by a change in relative proximal G6PC2 promoter activity. However, we show that both glucocorticoid levels and multiple differences in the relative activity of eight transcriptional enhancers between mice and humans likely contribute to differential G6PC2 expression. Finally, we show that a mouse-specific non-coding RNA, Gm13613, whose expression is controlled by G6pc2 enhancer I, does not regulate G6pc2 expression, indicating that altered expression of Gm13613 in a humanized mouse that contains both the human promoter and enhancers should not affect G6PC2 function.</p>","PeriodicalId":16570,"journal":{"name":"Journal of molecular endocrinology","volume":" ","pages":""},"PeriodicalIF":3.8,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11439184/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141909929","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Icariside II protects from marrow adipose tissue (MAT) expansion in estrogen-deficient mice by targeting S100A16. 淫羊藿苷 II 通过靶向 S100A16 保护雌激素缺乏小鼠的骨髓脂肪组织 (MAT) 免受扩张。
IF 3.6 4区 医学
Journal of molecular endocrinology Pub Date : 2024-09-18 Print Date: 2024-10-01 DOI: 10.1530/JME-24-0020
Dong Li, Chenhao Cao, Zhuofan Li, Zhiyong Chang, Ping Cai, Chenxi Zhou, Jun Liu, Kaihua Li, Bin Du
{"title":"Icariside II protects from marrow adipose tissue (MAT) expansion in estrogen-deficient mice by targeting S100A16.","authors":"Dong Li, Chenhao Cao, Zhuofan Li, Zhiyong Chang, Ping Cai, Chenxi Zhou, Jun Liu, Kaihua Li, Bin Du","doi":"10.1530/JME-24-0020","DOIUrl":"10.1530/JME-24-0020","url":null,"abstract":"<p><p>Icariside II, a flavonoid glycoside, is the main component found invivo after the administration of Herba epimedii and has shown some pharmacological effects, such as prevention of osteoporosis and enhancement of immunity. Increased levels of marrow adipose tissue are associated with osteoporosis. S100 calcium-binding protein A16 (S100A16) promotes the differentiation of bone marrow mesenchymal stem cells (BMSCs) into adipocytes. This study aimed to confirm the anti-lipidogenesis effect of Icariside II in the bone marrow by inhibiting S100A16 expression. We used ovariectomy (OVX) and BMSC models. The results showed that Icariside II reduced bone marrow fat content and inhibited BMSCs adipogenic differentiation and S100A16 expression, which correlated with lipogenesis. Overexpression of S100A16 eliminated the inhibitory effect of Icariside II on lipid formation. β-catenin participated in the regulation adipogenesis mediated by Icariside II/S100A16 in the bone. In conclusion, Icariside II protects against OVX-induced bone marrow adipogenesis by downregulating S100A16, in which β-catenin might also be involved.</p>","PeriodicalId":16570,"journal":{"name":"Journal of molecular endocrinology","volume":" ","pages":""},"PeriodicalIF":3.6,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11466200/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141889503","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 role of receptor activity-modifying proteins in obesity and diabetes mellitus 受体活性修饰蛋白在肥胖症和糖尿病中的作用
IF 3.5 4区 医学
Journal of molecular endocrinology Pub Date : 2024-09-01 DOI: 10.1530/jme-24-0056
Milena A Malcharek, Abigail Pearce, Cheryl A Brighton, David C Hornigold, Graham Ladds
{"title":"The role of receptor activity-modifying proteins in obesity and diabetes mellitus","authors":"Milena A Malcharek, Abigail Pearce, Cheryl A Brighton, David C Hornigold, Graham Ladds","doi":"10.1530/jme-24-0056","DOIUrl":"https://doi.org/10.1530/jme-24-0056","url":null,"abstract":"<p>Receptor activity-modifying proteins (RAMPs) modulate the expression and activity of numerous G protein-coupled receptors, primarily those within class B1. These receptors have important physiological roles, including in the regulation of food intake, energy metabolism, and glucose homeostasis. Dysregulation of these pathways can lead to obesity and diabetes mellitus, which present an ever-expanding global challenge. Whilst the roles of class B1 receptors and their peptide agonists in obesity and diabetes have been investigated, the contribution of RAMPs is less well understood. This review summarises the results of RAMP knockout studies, highlighting the involvement of these proteins in the incidence of disease. It then moves to discuss how receptor, RAMP, and agonist expression changes in disease states, and the benefits (or detriments) of these agonists to the pathways implicated in disease pathophysiology. Whilst much of the data centres around the calcitonin family of receptors, as their interactions with RAMPs are well established, this review then discusses receptors whose role in obesity and diabetes is well founded, but the significance of whose interactions with RAMPs is more recently emerging. The conclusion of this study of the literature is, however, that the information surrounding RAMPs is conflicting and multifaceted, and more research is required to fully understand their contribution to obesity and diabetes.</p>","PeriodicalId":16570,"journal":{"name":"Journal of molecular endocrinology","volume":"39 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142264988","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Pentraxin3 mediates inflammation and adipogenesis in Graves’ orbitopathy pathogenesis Pentraxin3在巴塞杜氏眼眶病发病机制中介导炎症和脂肪生成
IF 3.5 4区 医学
Journal of molecular endocrinology Pub Date : 2024-09-01 DOI: 10.1530/jme-24-0039
Min Seok Kim, Hyun Young Park, Soo Hyun Choi, Eun-Ju Chang, JaeSang Ko, Jin Sook Yoon
{"title":"Pentraxin3 mediates inflammation and adipogenesis in Graves’ orbitopathy pathogenesis","authors":"Min Seok Kim, Hyun Young Park, Soo Hyun Choi, Eun-Ju Chang, JaeSang Ko, Jin Sook Yoon","doi":"10.1530/jme-24-0039","DOIUrl":"https://doi.org/10.1530/jme-24-0039","url":null,"abstract":"<p>Pentraxin 3 (PTX3) is a prototypic humoral soluble pattern-recognition molecule known to function in immunity-related inflammation. Given the lack of information on the precise functions of PTX3 in the pathogenesis of Graves’ orbitopathy (GO), this study investigated the role of PTX3 in the inflammation and adipogenesis mechanism of GO. We first compared the PTX3 expression between orbital tissues from patients with GO and normal controls, using real-time polymerase chain reaction, which estimated significantly higher PTX3 transcript levels in the GO tissues than in the normal tissues. In addition, PTX3 production was markedly increased upon interleukin (IL)-1β and adipogenic stimulation. We then evaluated the effects of silencing PTX3 in primary orbital fibroblast cultures by analyzing the expression levels of pro-inflammatory cytokines, adipogenesis-related proteins, and downstream transcription factors in cells transfected with or without a small interfering RNA against PTX3, using western blot. Silencing PTX3 attenuated the IL-1β-induced secretion of pro-inflammatory cytokines, including IL-6, IL-8, monocyte chemotactic protein-1, intercellular adhesion molecule-1, and cyclooxygenase-2, and suppressed the IL-1β-mediated activation of p38 kinase, nuclear factor-κB, and extracellular signal-regulated kinase. Moreover, PTX3 knockdown suppressed adipogenic differentiation, as assessed using Oil Red O staining, as well as the expression of adipogenesis-associated transcription factors including peroxisome proliferator activator-γ, CCAAT/enhancer-binding proteins α and β, adipocyte protein 2, adiponectin, and leptin. Thus, this study suggests that PTX3 plays a significant role in the pathogenesis of GO and may serve as a novel therapeutic target for the condition.</p>","PeriodicalId":16570,"journal":{"name":"Journal of molecular endocrinology","volume":"30 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142264989","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Constitutive internalisation of EP2 differentially regulates G protein signalling EP2 先天性内化可对 G 蛋白信号进行不同程度的调节
IF 3.5 4区 医学
Journal of molecular endocrinology Pub Date : 2024-04-01 DOI: 10.1530/jme-23-0153
Abigail R. Walker, Holly Ann Parkin, Sung Hye Kim, Vasso Terzidou, David F Woodward, Phillip R Bennett, Aylin C. Hanyaloglu
{"title":"Constitutive internalisation of EP2 differentially regulates G protein signalling","authors":"Abigail R. Walker, Holly Ann Parkin, Sung Hye Kim, Vasso Terzidou, David F Woodward, Phillip R Bennett, Aylin C. Hanyaloglu","doi":"10.1530/jme-23-0153","DOIUrl":"https://doi.org/10.1530/jme-23-0153","url":null,"abstract":"<p>The prostanoid G protein-coupled receptor (GPCR) EP2 is widely expressed and implicated in endometriosis, osteoporosis, obesity, pre-term labour, and cancer. Internalisation and intracellular trafficking are critical for shaping GPCR activity, yet little is known regarding spatial programming of EP2 signalling and whether this can be exploited pharmacologically. Using three EP2-selective ligands that favour activation of different EP2 pathways, we show that EP2 undergoes limited agonist-driven internalisation but is constitutively internalised via dynamin-dependent, β-arrestin-independent pathways. EP2 was constitutively trafficked to early and very early endosomes (VEE) which was not altered by ligand activation. APPL1, a key adaptor and regulatory protein of the VEE, did not impact EP2 agonist-mediated cAMP. Internalisation was required for ~70% of the acute butaprost- and AH13205-mediated cAMP signalling, yet PGN9856i, a Gαs biased agonist, was less dependent on receptor internalisation for its cAMP signalling, particularly in human term pregnant myometrial cells that endogenously express EP2. Inhibition of EP2 internalisation partially reduced calcium signalling activated by butaprost or AH13205 and had no effect on PGE2 secretion. This indicates an agonist-dependent differential spatial requirement for Gαs and Gαq/11 signalling and a role for plasma membrane initiated Gαq/11-Ca2+-mediated PGE2 secretion. These findings reveal a key role for EP2 constitutive internalisation in its signalling and potential spatial bias in mediating its downstream functions. This in turn could highlight important considerations for future selective targeting of EP2 signalling pathways.</p>","PeriodicalId":16570,"journal":{"name":"Journal of molecular endocrinology","volume":"19 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140629693","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
ZMIZ1 enhances ERα-dependent expression of E2F2 in breast cancer ZMIZ1 可增强乳腺癌中 ERα 依赖性 E2F2 的表达
IF 3.5 4区 医学
Journal of molecular endocrinology Pub Date : 2024-04-01 DOI: 10.1530/jme-23-0133
Weiye Zhao, Susanna F Rose, Ryan Blake, Aňze Godicelj, Amy E Cullen, Jack Stenning, Lucy Beevors, Marcel Gehrung, Sanjeev Kumar, Kamal Kishore, Ashley Sawle, Matthew Eldridge, Federico M Giorgi, Katherine S Bridge, Florian Markowetz, Andrew N Holding
{"title":"ZMIZ1 enhances ERα-dependent expression of E2F2 in breast cancer","authors":"Weiye Zhao, Susanna F Rose, Ryan Blake, Aňze Godicelj, Amy E Cullen, Jack Stenning, Lucy Beevors, Marcel Gehrung, Sanjeev Kumar, Kamal Kishore, Ashley Sawle, Matthew Eldridge, Federico M Giorgi, Katherine S Bridge, Florian Markowetz, Andrew N Holding","doi":"10.1530/jme-23-0133","DOIUrl":"https://doi.org/10.1530/jme-23-0133","url":null,"abstract":"<p>The Estrogen Receptor-alpha (ER) drives 75% of breast cancers. On activation, the ER recruits and assembles a 1-2 MDa transcriptionally active complex. These complexes can modulate tumour growth, and understanding the roles of individual proteins within these complexes can help identify new therapeutic targets. Here, we present the discovery of ER and ZMIZ1 within the same multi-protein assembly by quantitative proteomics, and validated by proximity ligation assay. We characterise ZMIZ1 function by demonstrating a significant decrease in the proliferation of ER-positive cancer cell lines. To establish a role for the ER-ZMIZ1 interaction, we measured the transcriptional changes in the estrogen response post-ZMIZ1 knockdown using an RNA-seq time-course over 24 hours. GSEA analysis of the ZMIZ1-knockdown data identified a specific delay in the response of estradiol-induced cell cycle genes. Integration of ENCODE data with our RNA-seq results identified that ER and ZMIZ1 both bind the promoter of E2F2. We therefore propose that ER and ZMIZ1 interact to enable the efficient estrogenic response at subset of cell cycle genes via a novel ZMIZ1-ER-E2F2 signalling axis. Finally, we show that high ZMIZ1 expression is predictive of worse patient outcome, ER and ZMIZ1 are co-expressed in breast cancer patients in TCGA and METABRIC, and the proteins are co-localised within the nuclei of tumours cell in patient biopsies. In conclusion, we establish that ZMIZ1 is a regulator of the estrogenic cell cycle response and provide evidence of the biological importance of the ER-ZMIZ1 interaction in ER-positive patient tumours, supporting potential clinical relevance.</p>","PeriodicalId":16570,"journal":{"name":"Journal of molecular endocrinology","volume":"238 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140571954","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
circ_0134120: a new frontier in understanding postmenopausal osteoporosis pathogenesis circ_0134120:了解绝经后骨质疏松症发病机制的新领域
IF 3.5 4区 医学
Journal of molecular endocrinology Pub Date : 2024-04-01 DOI: 10.1530/jme-23-0140
Junling Wang, Hongyan Zhang, Yue Cao, Irene Ma, Xuefang Liang, Dongfang Xiang
{"title":"circ_0134120: a new frontier in understanding postmenopausal osteoporosis pathogenesis","authors":"Junling Wang, Hongyan Zhang, Yue Cao, Irene Ma, Xuefang Liang, Dongfang Xiang","doi":"10.1530/jme-23-0140","DOIUrl":"https://doi.org/10.1530/jme-23-0140","url":null,"abstract":"<p>Postmenopausal osteoporosis (OP) is a prevalent skeletal disease with not fully understood molecular mechanisms. This study aims to investigate the role of circular RNA (circRNA) in postmenopausal OP and to elucidate the potential mechanisms of the circRNA-miRNA-mRNA regulatory network. We obtained circRNA and miRNA expression profiles from postmenopausal OP patients from the Gene Expression Omnibus database. By identifying differentially expressed circRNAs and miRNAs, we constructed a circRNA-miRNA-mRNA network and identified key genes associated with OP. Further, through a range of experimental approaches, including dual-luciferase reporter assays, RNA pull-down experiments, and qRT-PCR, we examined the roles of circ_0134120, miR-590-5p, and STAT3 in the progression of OP. Our findings reveal that the interaction between circ_0134120 and miR-590-5p in regulating STAT3 gene expression is a key mechanism in OP, suggesting the circRNA-miRNA-mRNA network ais a potential therapeutic target for this condition.</p>","PeriodicalId":16570,"journal":{"name":"Journal of molecular endocrinology","volume":"50 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140572245","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Sex and age affect depot expression of Ca2+ channels in rat white fat adipocytes. 性别和年龄会影响大鼠白色脂肪脂肪细胞中 Ca2+ 通道的表达。
IF 3.8 4区 医学
Journal of molecular endocrinology Pub Date : 2024-02-28 Print Date: 2024-05-01 DOI: 10.1530/JME-23-0108
Yan Meng, Maria Toledo-Rodriguez, Olena Fedorenko, Paul A Smith
{"title":"Sex and age affect depot expression of Ca2+ channels in rat white fat adipocytes.","authors":"Yan Meng, Maria Toledo-Rodriguez, Olena Fedorenko, Paul A Smith","doi":"10.1530/JME-23-0108","DOIUrl":"10.1530/JME-23-0108","url":null,"abstract":"<p><p>White adipose tissue (WAT) requires extracellular Ca2+ influx for lipolysis, differentiation, and expansion. This partly occurs via plasma membrane Ca2+ voltage-dependent channels (CaVs). However, WFA exists in different depots whose function varies with age, sex, and location. To explore whether their CaV expression profiles also differ we used RNAseq and qPCR on gonadal, mesenteric, retroperitoneal, and inguinal subcutaneous fat depots from rats of different ages and sex. CaV expression was found dependent on age, sex, and WFA location. In the gonadal depots of both sexes a significantly lower expression of CaV1.2 and CaV1.3 was seen for adults compared to pre-pubescent juveniles. A lower level of expression was also seen for CaV3.1 in adult male but not female gonadal WFA, the latter of whose expression remained unchanged with age. Relatively little expression of CaV3.2 and 3.2 was observed. In post-pubescent inguinal subcutaneous fat, where the third and fourth mammary glands are located, CaV3.1 was decreased in males but increased in females - thus suggesting that this channel is associated with mammogenesis; however, no difference in intracellular Ca2+ levels or adipocyte size were noted. For all adult depots, CaV3.1 expression was larger in females than males - a difference not seen in pre-pubescent rats. These observations are consistent with the changes of CaV3.1 expression seen in 3T3-L1 cell differentiation and the ability of selective CaV3.1 antagonists to inhibit adipogensis. Our results show that changes in CaV expression patterns occur in fat depots related to sexual dimorphism: reproductive tracts and mammogenesis.</p>","PeriodicalId":16570,"journal":{"name":"Journal of molecular endocrinology","volume":" ","pages":""},"PeriodicalIF":3.8,"publicationDate":"2024-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10959010/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139650929","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Cellular mechanisms of incretin hormone secretion. 增量激素分泌的细胞机制。
IF 3.8 4区 医学
Journal of molecular endocrinology Pub Date : 2024-02-22 Print Date: 2024-05-01 DOI: 10.1530/JME-23-0112
Marta Santos-Hernández, Frank Reimann, Fiona M Gribble
{"title":"Cellular mechanisms of incretin hormone secretion.","authors":"Marta Santos-Hernández, Frank Reimann, Fiona M Gribble","doi":"10.1530/JME-23-0112","DOIUrl":"10.1530/JME-23-0112","url":null,"abstract":"<p><p>Enteroendocrine cells located along the gastrointestinal epithelium sense different nutrients/luminal contents that trigger the secretion of a variety of gut hormones with different roles in glucose homeostasis and appetite regulation. The incretin hormones glucagon-like peptide-1 (GLP-1) and glucose-dependent insulinotropic polypeptide (GIP) are involved in the regulation of insulin secretion, appetite, food intake and body weight after their nutrient-induced secretion from the gut. GLP-1 mimetics have been developed and used in the treatment of type 2 diabetes mellitus and obesity. Modulating the release of endogenous intestinal hormones may be a promising approach for the treatment of obesity and type 2 diabetes without surgery. For that reason, current understanding of the cellular mechanisms underlying intestinal hormone secretion will be the focus of this review. The mechanisms controlling hormone secretion depend on the nature of the stimulus, involving a variety of signalling pathways including ion channels, nutrient transporters and G-protein-coupled receptors.</p>","PeriodicalId":16570,"journal":{"name":"Journal of molecular endocrinology","volume":" ","pages":""},"PeriodicalIF":3.8,"publicationDate":"2024-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10959011/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139491598","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:604180095
Book学术官方微信