Diabetologia最新文献

{"title":"How should we define subtypes of gestational diabetes mellitus?","authors":"Christian Göbl, Andrea Tura","doi":"10.1007/s00125-025-06374-x","DOIUrl":"10.1007/s00125-025-06374-x","url":null,"abstract":"","PeriodicalId":11164,"journal":{"name":"Diabetologia","volume":" ","pages":"896-897"},"PeriodicalIF":8.4,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143425157","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"How should we define subtypes of gestational diabetes mellitus? Reply to Göbl C, Tura A [letter].","authors":"Danielle L Jones, Laura C Kusinski, Clare Gillies, Claire L Meek","doi":"10.1007/s00125-025-06375-w","DOIUrl":"10.1007/s00125-025-06375-w","url":null,"abstract":"","PeriodicalId":11164,"journal":{"name":"Diabetologia","volume":" ","pages":"898-899"},"PeriodicalIF":8.4,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143425161","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Correction: Umbilical cord-derived mesenchymal stromal cells preserve endogenous insulin production in type 1 diabetes: a Phase I/II randomised double-blind placebo-controlled trial.","authors":"Per-Ola Carlsson, Daniel Espes, Sofia Sisay, Lindsay C Davies, C I Edvard Smith, Mathias G Svahn","doi":"10.1007/s00125-025-06371-0","DOIUrl":"10.1007/s00125-025-06371-0","url":null,"abstract":"","PeriodicalId":11164,"journal":{"name":"Diabetologia","volume":" ","pages":"900-901"},"PeriodicalIF":8.4,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11950065/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143491243","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Considerations for more actionable consensus guidance for monitoring individuals with islet autoantibody-positive pre-stage 3 type 1 diabetes. Reply to Mallone R [letter].","authors":"Moshe Phillip, Peter Achenbach, Ananta Addala, Anastasia Albanese-O'Neill, Tadej Battelino, Kirstine J Bell, Rachel E J Besser, Ezio Bonifacio, Helen M Colhoun, Jennifer J Couper, Maria E Craig, Thomas Danne, Carine de Beaufort, Klemen Dovc, Sanjoy Dutta, Osagie Ebekozien, Helena Elding Larsson, Brigitte I Frohnert, Mary P Gallagher, Carla J Greenbaum, Kurt J Griffin, William Hagopian, Michael J Haller, Emile Hendriks, Richard I G Holt, Heba M Ismail, Laura M Jacobsen, Leslie E Kolb, Olga Kordonouri, Karin Lange, Robert W Lash, Åke Lernmark, Ingrid Libman, Markus Lundgren, David M Maahs, M Loredana Marcovecchio, Chantal Mathieu, Tal Oron, Shivajirao P Patil, Marian J Rewers, Stephen S Rich, Desmond A Schatz, Rifka Schulman-Rosenbaum, Kimber M Simmons, Emily K Sims, Jay S Skyler, Cate Speake, Andrea K Steck, Ksenia N Tonyushkina, Riitta Veijola, John M Wentworth, Diane K Wherrett, Jamie R Wood, Anette-Gabriele Ziegler, Linda A DiMeglio","doi":"10.1007/s00125-024-06350-x","DOIUrl":"10.1007/s00125-024-06350-x","url":null,"abstract":"","PeriodicalId":11164,"journal":{"name":"Diabetologia","volume":" ","pages":"892-895"},"PeriodicalIF":8.4,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143398836","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Correction: Pharmaceutical targeting of the cannabinoid type 1 receptor impacts the crosstalk between immune cells and islets to reduce insulitis in humans.","authors":"Elise Wreven, María Soledad Ruiz de Adana, Stéphan Hardivillé, Valery Gmyr, Julie Kerr-Conte, Mikael Chetboun, Gianni Pasquetti, Nathalie Delalleau, Julien Thévenet, Anaïs Coddeville, María José Vallejo Herrera, Liad Hinden, Inmaculada Concepción Benavides Espínola, Mireia Gómez Duro, Lourdes Sanchez Salido, Francisca Linares, Francisco-Javier Bermúdez-Silva, Joseph Tam, Caroline Bonner, Josephine M Egan, Gabriel Olveira, Natalia Colomo, François Pattou, Isabel González-Mariscal","doi":"10.1007/s00125-025-06372-z","DOIUrl":"10.1007/s00125-025-06372-z","url":null,"abstract":"","PeriodicalId":11164,"journal":{"name":"Diabetologia","volume":" ","pages":"902"},"PeriodicalIF":8.4,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11950003/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143425150","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Macular perfusion alterations in people with recent-onset diabetes and novel diabetes subtypes","authors":"Sema Kaya, Ala Khamees, Gerd Geerling, Piotr Strzalkowski, Veronika Gontscharuk, Julia Szendroedi, Karsten Müssig, Dan Ziegler, Michael Roden, Rainer Guthoff","doi":"10.1007/s00125-025-06407-5","DOIUrl":"https://doi.org/10.1007/s00125-025-06407-5","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Aims/hypothesis</h3><p>Our aim was to detect early structural and functional changes in the macular capillaries using optical coherence tomography angiography during the course of type 1 or 2 diabetes mellitus.</p><h3 data-test=\"abstract-sub-heading\">Methods</h3><p>In this cross-sectional study, individuals with type 1 diabetes (<i>n</i>=143) or type 2 diabetes (<i>n</i>=197) from the German Diabetes Study (ClinicalTrials.gov registration no. NCT01055093) underwent clinical examination and cluster analysis to identify phenotype-based diabetes subtypes, using BMI, age, HbA<sub>1c</sub>, homoeostasis model estimates and islet autoantibodies. Colour fundus photography, optical coherence tomography and optical coherence tomography angiography were performed within the first year of diabetes diagnosis (baseline) and at 5 year intervals up to year 10. Age- and sex-adjusted participants served as control participants (<i>n</i>=105). Perfusion density, vessel density, presence of retinal microaneurysms in superficial, intermediate and deep capillary plexus (SCP, ICP, DCP), choriocapillaris flow deficit density (CC FD) and the foveal avascular zone (FAZ) of the macula as well as retinal layer thickness, visual acuity and contrast sensitivity were analysed.</p><h3 data-test=\"abstract-sub-heading\">Results</h3><p>Perfusion density and vessel density of SCP were already reduced at baseline in type 2 diabetes (expected difference compared with control participants: −0.0071, <i>p</i>=0.0276, expected difference: −0.0034, <i>p</i>=0.0184, respectively), especially in participants with severe insulin-deficient and mild obesity-related diabetes. At year 10 only perfusion density of the SCP and DCP was reduced in both type 1 and 2 diabetes (<i>p</i>=0.0365, <i>p</i>=0.0062, respectively). The FAZ was enlarged and the CC FD within the first year increased in type 1 (<i>p</i>=0.0327, <i>p</i>=0.0474, respectively) and more markedly in type 2 diabetes (<i>p</i>=0.0006, <i>p</i><0.0001). The occurrence of microaneurysms in SCP and DCP was significant at year 5 (<i>p</i>=0.0209, <i>p</i>=0.0279, respectively) and year 10 (<i>p</i>=0.0220, <i>p</i>=0.0007). Presence of microaneurysms in SCP and DCP was associated with decreases in perfusion density and vessel density in both SCP and ICP. Furthermore, microaneurysms were associated with decreased ganglion cell layer and inner plexiform layer thickness.</p><h3 data-test=\"abstract-sub-heading\">Conclusions/interpretation</h3><p>Type 2 diabetes already reduces macular perfusion SCP at time of clinical diagnosis, while long-standing diabetes affects both SCP and DCP. The FAZ of the SCP and the CC FD are early indicators of diabetic alterations, with more pronounced changes observed in type 2 diabetes. Microaneurysms in the macular plexus are associated with a decrease of ganglion cell layer and inner plexiform layer. Subclinical microangiopathy occurs prior to manifestation of diabetic r","PeriodicalId":11164,"journal":{"name":"Diabetologia","volume":"5 1","pages":""},"PeriodicalIF":8.2,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143745536","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"HEXA-FC protein therapy increases skeletal muscle glucose uptake and improves glycaemic control in mice with insulin resistance and in a mouse model of type 2 diabetes","authors":"Magdalene K. Montgomery, Sihan Lin, Chieh-Hsin Yang, Krishneel Prasad, Zhi Li Cheng, Jacqueline Bayliss, Michael G. Leeming, Nicholas A. Williamson, Kim Loh, Li Dong, Matthew J. Watt","doi":"10.1007/s00125-025-06413-7","DOIUrl":"https://doi.org/10.1007/s00125-025-06413-7","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Aims/hypothesis</h3><p>Type 2 diabetes is a chronic metabolic disorder characterised by insulin resistance and sustained hyperglycaemia, and is a major cause of blindness, kidney failure, heart attacks and stroke. Our team has recently identified hexosaminidase A (HEXA) as an endocrine factor secreted by the liver that regulates sphingolipid metabolism in skeletal muscle. Specifically, HEXA converts GM2 to GM3 gangliosides within cell-surface lipid rafts. Remodelling of ganglioside composition by HEXA enhances IGF1 signalling in skeletal muscle, increasing muscle glucose uptake and improving blood glucose control.</p><h3 data-test=\"abstract-sub-heading\">Methods</h3><p>We produced a long-acting HEXA-FC fusion protein (murine HEXA and the fragment crystallisable [FC] region from IgG1) and evaluated the effects of chronic bi-weekly HEXA-FC administration (1 mg/kg body weight) on glycaemic control in C57BL/6 mice with diet-induced obesity and insulin resistance and the <i>db</i>/<i>db</i> mouse model of severe type 2 diabetes. Outcome measures included glucose and insulin tolerance, including a stable isotope-labelled GTT and assessment of tissue-specific glucose disposal, as well as proteomics analysis to define changes in skeletal muscle metabolism.</p><h3 data-test=\"abstract-sub-heading\">Results</h3><p>Chronic administration of a long-acting recombinant HEXA-FC fusion protein led to improvements in random blood glucose, fasting blood glucose and glucose tolerance, driven by increased glucose disposal into skeletal muscle, effects that were associated with enhancement of IGF1 signalling in muscle.</p><h3 data-test=\"abstract-sub-heading\">Conclusions/interpretation</h3><p>Given that skeletal muscle is a primary site of insulin resistance in individuals with type 2 diabetes, HEXA-FC protein therapy may open new avenues for therapeutic advancement in type 2 diabetes.</p><h3 data-test=\"abstract-sub-heading\">Graphical Abstract</h3>\u0000","PeriodicalId":11164,"journal":{"name":"Diabetologia","volume":"30 1","pages":""},"PeriodicalIF":8.2,"publicationDate":"2025-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143733951","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"TMEM55A-mediated PI5P signalling regulates alpha cell actin depolymerisation and glucagon secretion","authors":"Xiong Liu, Theodore dos Santos, Aliya F. Spigelman, Shawn Duckett, Nancy Smith, Kunimasa Suzuki, Patrick E. MacDonald","doi":"10.1007/s00125-025-06411-9","DOIUrl":"https://doi.org/10.1007/s00125-025-06411-9","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Aims/hypothesis</h3><p>Diabetes is associated with the dysfunction of glucagon-producing pancreatic islet alpha cells, although the underlying mechanisms regulating glucagon secretion and alpha cell dysfunction remain unclear. While insulin secretion from pancreatic beta cells has long been known to be controlled partly by intracellular phospholipid signalling, very little is known about the role of phospholipids in glucagon secretion. Using patch-clamp electrophysiology and single-cell RNA sequencing, we previously found that expression of <i>PIP4P2</i> (encoding TMEM55A, a lipid phosphatase that dephosphorylates phosphatidylinositol-4,5-bisphosphate [PIP2] to phosphatidylinositol-5-phosphate [PI5P]) correlates with alpha cell function. We hypothesise that TMEM55A is involved in glucagon secretion and aim to validate the role of TMEM55A and its potential signalling molecules in alpha cell function and glucagon secretion.</p><h3 data-test=\"abstract-sub-heading\">Methods</h3><p>Correlation analysis was generated from the data in www.humanislets.com. Human islets were isolated at the Alberta Diabetes Institute IsletCore. Electrical recordings were performed on dispersed human or mouse islets with scrambled siRNA or si-<i>PIP4P2</i> (<i>si-Pip4p2</i> for mouse) transfection. Glucagon secretion was measured using an islet perfusion system with intact mouse islets. TMEM55A activity was measured using an in vitro on-beads phosphatase assay and live-cell imaging. GTPase activity was measured using an active GTPase pull-down assay. Confocal microscopy was used to quantify F-actin intensity using primary alpha cells and alphaTC1–9 cell lines after chemical treatment.</p><h3 data-test=\"abstract-sub-heading\">Results</h3><p>TMEM55A regulated alpha cell exocytosis and glucagon secretion. TMEM55A knockdown in both human and mouse alpha cells reduced exocytosis at low glucose levels and this was rescued by the direct reintroduction of PI5P. PI5P, instead of PIP2 increased the glucagon secretion using intact mouse islets. This did not occur through an effect on Ca²⁺ channel activity but through a remodelling of cortical F-actin dependent on TMEM55A lipid phosphatase activity, which occurred in response to oxidative stress. TMEM55A- and PI5P-induced F-actin remodelling depends on the inactivation of GTPase and RhoA, instead of Ras-related C3 botulinum toxin substrate 1 or CDC42.</p><h3 data-test=\"abstract-sub-heading\">Conclusions/interpretation</h3><p>We reveal a novel pathway by which TMEM55A regulates alpha cell exocytosis by controlling intracellular PI5P and the F-actin network.</p><h3 data-test=\"abstract-sub-heading\">Graphical Abstract</h3>\u0000","PeriodicalId":11164,"journal":{"name":"Diabetologia","volume":"61 1","pages":""},"PeriodicalIF":8.2,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143712732","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Regulating islet stress responses through CD47 activation","authors":"Atharva Kale, Mahmoud Azar, Vanessa Cheng, Harry Robertson, Sally Coulter, Paulomi M. Mehta, Sohel M. Julovi, Ellis Patrick, Kedar Ghimire, Natasha M. Rogers","doi":"10.1007/s00125-025-06409-3","DOIUrl":"https://doi.org/10.1007/s00125-025-06409-3","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Aims/hypothesis</h3><p>Diabetes is a global health burden characterised by incremental beta cell loss. Islet transplantation is a recognised treatment for individuals with type 1 diabetes and hypoglycaemia unawareness but broader application is constrained by limited islet survival and function post-transplantation. The underlying molecular mechanisms that induce beta cell dysfunction and demise remain unclear, and therapeutic agents that protect against cellular loss and maintain insulin secretion are in demand as potential treatment options. CD47 is a cell surface protein implicated in cellular stress responses but its role in beta cell function remains relatively unexplored. We hypothesised that modulating CD47 expression would demonstrate a cytoprotective effect in beta cells.</p><h3 data-test=\"abstract-sub-heading\">Methods</h3><p>We used primary murine islets with/without genetic deletion of CD47, as well as human islets and MIN6 cells subjected to pharmacological disruption of CD47 signalling (siRNA or blocking antibody). Metabolic stress was induced in cells by exposure to hypoxia, hyperglycaemia or thapsigargin, and markers of the unfolded protein response, cell survival and insulin secretory function were assessed. Human pancreases from individuals with and without diabetes were examined for evidence of CD47 signalling.</p><h3 data-test=\"abstract-sub-heading\">Results</h3><p>Expression of CD47 and its high affinity ligand thrombospondin-1 (TSP1) was robustly upregulated by exogenous stressors. Limiting CD47 signalling improved markers of senescence, apoptosis, endoplasmic reticulum stress, unfolded protein response, self-renewal and autophagy, and maintained insulin secretory responses. We also found concurrent upregulated expression of CD47 and senescence markers in the endocrine pancreas of aged donors and those with type 2 diabetes. Both CD47 and TSP1 expression were increased in pancreases of humans with type 1 diabetes, as were plasma levels of TSP1.</p><h3 data-test=\"abstract-sub-heading\">Conclusions/interpretation</h3><p>Our study provides key insights into the essential role of CD47 as a novel regulator of islet dysfunction, regulating cytoprotective responses to stress. CD47 may contribute to beta cell damage during the development of diabetes and failure of islet transplant function. Therefore, limiting CD47 activation may be a potential therapeutic tool in conditions where islet function is inadequate.</p><h3 data-test=\"abstract-sub-heading\">Graphical Abstract</h3>\u0000","PeriodicalId":11164,"journal":{"name":"Diabetologia","volume":"29 1","pages":""},"PeriodicalIF":8.2,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143703046","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Quinine: rediscovery of an old glucose-lowering drug. Reply to Henquin J-C [letter].","authors":"Javad Anjom-Shoae, Michael Horowitz, Christine Feinle-Bisset","doi":"10.1007/s00125-025-06415-5","DOIUrl":"https://doi.org/10.1007/s00125-025-06415-5","url":null,"abstract":"","PeriodicalId":11164,"journal":{"name":"Diabetologia","volume":" ","pages":""},"PeriodicalIF":8.4,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143708992","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}