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When the liver is in poor condition, so is the heart - cardiac remodelling in MASH mouse models. 当肝脏状况不佳时,心脏也会受到影响--MASH 小鼠模型中的心脏重塑。
IF 6.7 2区 医学
Clinical science Pub Date : 2024-09-18 DOI: 10.1042/CS20240833
Sebastian Bott, Justine Lallement, Alice Marino, Evangelos-Panagiotis Daskalopoulos, Christophe Beauloye, Hrag Esfahani, Chantal Dessy, Isabelle Anne Leclercq
{"title":"When the liver is in poor condition, so is the heart - cardiac remodelling in MASH mouse models.","authors":"Sebastian Bott, Justine Lallement, Alice Marino, Evangelos-Panagiotis Daskalopoulos, Christophe Beauloye, Hrag Esfahani, Chantal Dessy, Isabelle Anne Leclercq","doi":"10.1042/CS20240833","DOIUrl":"10.1042/CS20240833","url":null,"abstract":"<p><p>Metabolic dysfunction-associated steatohepatitis (MASH) confers a risk for cardiovascular diseases in patients. Animal models may help exploring the mechanisms linking liver and heart diseases. Hence, we explored the cardiac phenotype in two MASH mouse models: foz/foz mice fed a high-fat diet (HFD) for 24 or 60 weeks and C57BL/6J mice fed a high-fat-, high-cholesterol-, and high-fructose diet for 60 weeks. Angiotensin II (AngII) was used as an additional cardiovascular stressor for 4 weeks in 10 weeks HFD-fed foz/foz mice. Foz/foz mice with fibrosing MASH developed cardiac hypertrophy with adverse cardiac remodelling not seen in WT similarly fed the HFD. AngII caused hypertension and up-regulated the expression of genes contributing to pathological cardiac hypertrophy (Nppa, Myh7) more severely so in foz/foz mice than in controls. After 60 weeks of HFD, while liver disease had progressed to burn-out non steatotic MASH with hepatocellular carcinoma in 50% of the animals, the cardiomyopathy did not. In an independent model (C57BL/6J mice fed a fat-, cholesterol- and fructose-rich diet), moderate fibrosing MASH is associated with cardiac fibrosis and dysregulation of genes involved in pathological remodelling (Col1a1, Col3a1, Vim, Myh6, Slc2a1). Thus, animals with MASH present consistent adverse structural changes in the heart with no patent alteration of cardiac function even when stressed with exogenous AngII. Liver disease, and likely not overfeeding or aging alone, is associated with this cardiac phenotype. Our findings support foz/foz mice as suitable for studying links between MASH and heart structural changes ahead of heart failure.</p>","PeriodicalId":10475,"journal":{"name":"Clinical science","volume":" ","pages":"1151-1171"},"PeriodicalIF":6.7,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11405860/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142105072","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 role of microRNAs in pregnancies complicated by maternal diabetes. 微RNA在妊娠合并糖尿病中的作用。
IF 6.7 2区 医学
Clinical science Pub Date : 2024-09-18 DOI: 10.1042/CS20230681
Manon D Owen, Margeurite G Kennedy, Rachel C Quilang, Eleanor M Scott, Karen Forbes
{"title":"The role of microRNAs in pregnancies complicated by maternal diabetes.","authors":"Manon D Owen, Margeurite G Kennedy, Rachel C Quilang, Eleanor M Scott, Karen Forbes","doi":"10.1042/CS20230681","DOIUrl":"https://doi.org/10.1042/CS20230681","url":null,"abstract":"<p><p>With the global prevalence of diabetes increasing, more people of reproductive age are experiencing hyperglycaemic pregnancies. Maternal Type 1 (T1DM) or Type 2 (T2DM) diabetes mellitus, and gestational diabetes mellitus (GDM) are associated with maternal cardiovascular and metabolic complications. Pregnancies complicated by maternal diabetes also increase the risk of short- and long-term health complications for the offspring, including altered fetal growth and the onset of T2DM and cardiometabolic diseases throughout life. Despite advanced methods for improving maternal glucose control, the prevalence of adverse maternal and offspring outcomes associated with maternal diabetes remains high. The placenta is a key organ at the maternal-fetal interface that regulates fetal growth and development. In pregnancies complicated by maternal diabetes, altered placental development and function has been linked to adverse outcomes in both mother and fetus. Emerging evidence suggests that microRNAs (miRNAs) are key molecules involved in mediating these changes. In this review, we describe the role of miRNAs in normal pregnancy and discuss how miRNA dysregulation in the placenta and maternal circulation is associated with suboptimal placental development and pregnancy outcomes in individuals with maternal diabetes. We also discuss evidence demonstrating that miRNA dysregulation may affect the long-term health of mothers and their offspring. As such, miRNAs are potential candidates as biomarkers and therapeutic targets in diabetic pregnancies at risk of adverse outcomes.</p>","PeriodicalId":10475,"journal":{"name":"Clinical science","volume":"138 18","pages":"1179-1207"},"PeriodicalIF":6.7,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11409017/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142281490","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
Identifying mitigating strategies for endothelial cell dysfunction and hypertension in response to VEGF receptor inhibitors. 确定内皮细胞功能障碍和高血压对血管内皮生长因子受体抑制剂反应的缓解策略。
IF 6.7 2区 医学
Clinical science Pub Date : 2024-09-18 DOI: 10.1042/CS20240537
Nicholas D Camarda, Qing Lu, Dawn M Meola, Joshua J Man, Zeyuan Song, Richard J Travers, Katherine E Lopez, Sarah N Powers, Malvina Papanastasiou, Katherine C DeRuff, James Mullahoo, Shawn B Egri, Desiree Davison, Paola Sebastiani, Scott T Eblen, Rachel Buchsbaum, Gordon S Huggins, Cheryl A London, Jacob D Jaffe, Jenica N Upshaw, Vicky K Yang, Iris Z Jaffe
{"title":"Identifying mitigating strategies for endothelial cell dysfunction and hypertension in response to VEGF receptor inhibitors.","authors":"Nicholas D Camarda, Qing Lu, Dawn M Meola, Joshua J Man, Zeyuan Song, Richard J Travers, Katherine E Lopez, Sarah N Powers, Malvina Papanastasiou, Katherine C DeRuff, James Mullahoo, Shawn B Egri, Desiree Davison, Paola Sebastiani, Scott T Eblen, Rachel Buchsbaum, Gordon S Huggins, Cheryl A London, Jacob D Jaffe, Jenica N Upshaw, Vicky K Yang, Iris Z Jaffe","doi":"10.1042/CS20240537","DOIUrl":"10.1042/CS20240537","url":null,"abstract":"<p><p>Vascular endothelial growth factor receptor inhibitors (VEGFRis) improve cancer survival but are associated with treatment-limiting hypertension, often attributed to endothelial cell (EC) dysfunction. Using phosphoproteomic profiling of VEGFRi-treated ECs, drugs were screened for mitigators of VEGFRi-induced EC dysfunction and validated in primary aortic ECs, mice, and canine cancer patients. VEGFRi treatment significantly raised systolic blood pressure (SBP) and increased markers of endothelial and renal dysfunction in mice and canine cancer patients. α-Adrenergic-antagonists were identified as drugs that most oppose the VEGFRi proteomic signature. Doxazosin, one such α-antagonist, prevented EC dysfunction in murine, canine, and human aortic ECs. In mice with sorafenib-induced-hypertension, doxazosin mitigated EC dysfunction but not hypertension or glomerular endotheliosis, while lisinopril mitigated hypertension and glomerular endotheliosis without impacting EC function. Hence, reversing EC dysfunction was insufficient to mitigate VEGFRi-induced-hypertension in this mouse model. Canine cancer patients with VEGFRi-induced-hypertension were randomized to doxazosin or lisinopril and both agents significantly decreased SBP. The canine clinical trial supports safety and efficacy of doxazosin and lisinopril as antihypertensives for VEGFRi-induced-hypertension and the potential of trials in canines with spontaneous cancer to accelerate translation. The overall findings demonstrate the utility of phosphoproteomics to identify EC-protective agents to mitigate cardio-oncology side effects.</p>","PeriodicalId":10475,"journal":{"name":"Clinical science","volume":"138 18","pages":"1131-1150"},"PeriodicalIF":6.7,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142281488","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
Endothelin-1 down-regulates nuclear factor erythroid 2-related factor-2 and contributes to perivascular adipose tissue dysfunction in obesity. 内皮素-1 下调核因子红细胞 2 相关因子-2,导致肥胖症患者血管周围脂肪组织功能障碍。
IF 6.7 2区 医学
Clinical science Pub Date : 2024-09-04 DOI: 10.1042/CS20240624
Anna Flavia R Lima, Daniel Rodrigues, Mirele R Machado, José Teles Oliveira-Neto, Alecsander F M Bressan, Carina A Pedersoli, Juliano V Alves, Júlio A Silva-Neto, Paula R Barros, Thiago B Dias, Luis V Garcia, Ariane Bruder-Nascimento, Thiago Bruder-Nascimento, Fernando S Carneiro, Luiz Osório S Leiria, Rita C Tostes, Rafael M Costa
{"title":"Endothelin-1 down-regulates nuclear factor erythroid 2-related factor-2 and contributes to perivascular adipose tissue dysfunction in obesity.","authors":"Anna Flavia R Lima, Daniel Rodrigues, Mirele R Machado, José Teles Oliveira-Neto, Alecsander F M Bressan, Carina A Pedersoli, Juliano V Alves, Júlio A Silva-Neto, Paula R Barros, Thiago B Dias, Luis V Garcia, Ariane Bruder-Nascimento, Thiago Bruder-Nascimento, Fernando S Carneiro, Luiz Osório S Leiria, Rita C Tostes, Rafael M Costa","doi":"10.1042/CS20240624","DOIUrl":"10.1042/CS20240624","url":null,"abstract":"<p><p>Perivascular adipose tissue (PVAT) negatively regulates vascular muscle contraction. However, in the context of obesity, the PVAT releases vasoconstrictor substances that detrimentally affect vascular function. A pivotal player in this scenario is the peptide endothelin-1 (ET-1), which induces oxidative stress and disrupts vascular function. The present study postulates that obesity augments ET-1 production in the PVAT, decreases the function of the nuclear factor erythroid 2-related factor-2 (Nrf2) transcription factor, further increasing reactive oxygen species (ROS) generation, culminating in PVAT dysfunction. Male C57BL/6 mice were fed either a standard or a high-fat diet for 16 weeks. Mice were also treated with saline or a daily dose of 100 mg·kg-1 of the ETA and ETB receptor antagonist Bosentan, for 7 days. Vascular function was evaluated in thoracic aortic rings, with and without PVAT. Mechanistic studies utilized PVAT from all groups and cultured WT-1 mouse brown adipocytes. PVAT from obese mice exhibited increased ET-1 production, increased ECE1 and ETA gene expression, loss of the anticontractile effect, as well as increased ROS production, decreased Nrf2 activity, and downregulated expression of Nrf2-targeted antioxidant genes. PVAT of obese mice also exhibited increased expression of Tyr216-phosphorylated-GSK3β and KEAP1, but not BACH1 - negative Nrf2 regulators. Bosentan treatment reversed all these effects. Similarly, ET-1 increased ROS generation and decreased Nrf2 activity in brown adipocytes, events mitigated by BQ123 (ETA receptor antagonist). These findings place ET-1 as a major contributor to PVAT dysfunction in obesity and highlight that pharmacological control of ET-1 effects restores PVAT's cardiovascular protective role.</p>","PeriodicalId":10475,"journal":{"name":"Clinical science","volume":" ","pages":"1071-1087"},"PeriodicalIF":6.7,"publicationDate":"2024-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141970815","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
Maternal high-fat diet regulates offspring hepatic ABCG5 expression and cholesterol metabolism via the gut microbiota and its derived butyrate. 母体高脂肪饮食通过肠道微生物群及其衍生的丁酸盐调节后代肝脏 ABCG5 的表达和胆固醇代谢。
IF 6.7 2区 医学
Clinical science Pub Date : 2024-09-04 DOI: 10.1042/CS20240997
Ling Zhang, Shixuan Zhang, Wenyu Zou, Yongyan Hu, Ying Gao, Junqing Zhang, Jia Zheng
{"title":"Maternal high-fat diet regulates offspring hepatic ABCG5 expression and cholesterol metabolism via the gut microbiota and its derived butyrate.","authors":"Ling Zhang, Shixuan Zhang, Wenyu Zou, Yongyan Hu, Ying Gao, Junqing Zhang, Jia Zheng","doi":"10.1042/CS20240997","DOIUrl":"10.1042/CS20240997","url":null,"abstract":"<p><p>Maternal high-fat diet intake has profound effects on the long-term health of offspring, predisposing them to a higher susceptibility to obesity and metabolic dysfunction-associated steatotic liver disease. However, the detailed mechanisms underlying the role of a maternal high-fat diet in hepatic lipid accumulation in offspring, especially at the weaning age, remain largely unclear. In this study, female C57BL/6J mice were randomly assigned to either a high-fat diet or a control diet, and lipid metabolism parameters were assessed in male offspring at weaning. Gut microbiota analysis and targeted metabolomics of short-chain fatty acids (SCFAs) in these offspring were further performed. Both in vivo and in vitro studies were conducted to explore the role of butyrate in hepatic cholesterol excretion in the liver and HepG2 cells. Our results showed that maternal high-fat feeding led to obesity and dyslipidemia, and exacerbated hepatic lipid accumulation in the livers of offspring at weaning. We observed significant decreases in the abundance of the Firmicutes phylum and the Allobaculum genus, known as producers of SCFAs, particularly butyrate, in the offspring of dams fed a high-fat diet. Additionally, maternal high-fat diet feeding markedly decreased serum butyrate levels and down-regulated ATP-binding cassette transporters G5 (ABCG5) in the liver, accompanied by decreased phosphorylated AMP-activated protein kinase (AMPK) and histone deacetylase 5 (HADC5) expressions. Subsequent in vitro studies revealed that butyrate could induce ABCG5 activation and alleviate lipid accumulation via the AMPK-pHDAC5 pathway in HepG2 cells. Moreover, knockdown of HDAC5 up-regulated ABCG5 expression and promoted cholesterol excretion in HepG2 cells. In conclusion, our study provides novel insights into how maternal high-fat diet feeding inhibits hepatic cholesterol excretion and down-regulates ABCG5 through the butyrate-AMPK-pHDAC5 pathway in offspring at weaning.</p>","PeriodicalId":10475,"journal":{"name":"Clinical science","volume":" ","pages":"1039-1054"},"PeriodicalIF":6.7,"publicationDate":"2024-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141970816","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
Candesartan restores blood-brain barrier dysfunction, mitigates aberrant gene expression, and extends lifespan in a knockin mouse model of epileptogenesis. 坎地沙坦能恢复血脑屏障功能障碍、减轻异常基因表达并延长癫痫发生基因敲除小鼠模型的寿命。
IF 6.7 2区 医学
Clinical science Pub Date : 2024-09-04 DOI: 10.1042/CS20240771
Michael F Hammer, Erfan Bahramnejad, Joseph C Watkins, Patrick T Ronaldson
{"title":"Candesartan restores blood-brain barrier dysfunction, mitigates aberrant gene expression, and extends lifespan in a knockin mouse model of epileptogenesis.","authors":"Michael F Hammer, Erfan Bahramnejad, Joseph C Watkins, Patrick T Ronaldson","doi":"10.1042/CS20240771","DOIUrl":"10.1042/CS20240771","url":null,"abstract":"<p><p>Blockade of Angiotensin type 1 receptor (AT1R) has potential therapeutic utility in the treatment of numerous detrimental consequences of epileptogenesis, including oxidative stress, neuroinflammation, and blood-brain barrier (BBB) dysfunction. We have recently shown that many of these pathological processes play a critical role in seizure onset and propagation in the Scn8a-N1768D mouse model. Here we investigate the efficacy and potential mechanism(s) of action of candesartan (CND), an FDA-approved angiotensin receptor blocker (ARB) indicated for hypertension, in improving outcomes in this model of pediatric epilepsy. We compared length of lifespan, seizure frequency, and BBB permeability in juvenile (D/D) and adult (D/+) mice treated with CND at times after seizure onset. We performed RNAseq on hippocampal tissue to quantify differences in genome-wide patterns of transcript abundance and inferred beneficial and detrimental effects of canonical pathways identified by enrichment methods in untreated and treated mice. Our results demonstrate that treatment with CND gives rise to increased survival, longer periods of seizure freedom, and diminished BBB permeability. CND treatment also partially reversed or 'normalized' disease-induced genome-wide gene expression profiles associated with inhibition of NF-κB, TNFα, IL-6, and TGF-β signaling in juvenile and adult mice. Pathway analyses reveal that efficacy of CND is due to its known dual mechanism of action as both an AT1R antagonist and a PPARγ agonist. The robust effectiveness of CND across ages, sexes and mouse strains is a positive indication for its translation to humans and its suitability of use for clinical trials in children with SCN8A epilepsy.</p>","PeriodicalId":10475,"journal":{"name":"Clinical science","volume":" ","pages":"1089-1110"},"PeriodicalIF":6.7,"publicationDate":"2024-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141874360","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
Mineralocorticoid receptor (MR) antagonist eplerenone and MR modulator balcinrenone prevent renal extracellular matrix remodeling and inflammation via the MR/proteoglycan/TLR4 pathway. 矿质皮质激素受体(MR)拮抗剂依普利酮和MR调节剂巴新酮可通过MR/蛋白聚糖/TLR4途径防止肾脏细胞外基质重塑和炎症。
IF 6.7 2区 医学
Clinical science Pub Date : 2024-08-21 DOI: 10.1042/CS20240302
Roberto Palacios-Ramirez, Matthieu Soulié, Amaya Fernandez-Celis, Toshifumi Nakamura, Nabiha Boujardine, Benjamin Bonnard, Krister Bamberg, Natalia Lopez-Andres, Frederic Jaisser
{"title":"Mineralocorticoid receptor (MR) antagonist eplerenone and MR modulator balcinrenone prevent renal extracellular matrix remodeling and inflammation via the MR/proteoglycan/TLR4 pathway.","authors":"Roberto Palacios-Ramirez, Matthieu Soulié, Amaya Fernandez-Celis, Toshifumi Nakamura, Nabiha Boujardine, Benjamin Bonnard, Krister Bamberg, Natalia Lopez-Andres, Frederic Jaisser","doi":"10.1042/CS20240302","DOIUrl":"10.1042/CS20240302","url":null,"abstract":"<p><p>Excessive activation of the mineralocorticoid receptor (MR) is implicated in cardiovascular and renal disease. Decreasing MR activation with MR antagonists (MRA) is effective to slow chronic kidney disease (CKD) progression and its cardiovascular comorbidities in animal models and patients. The present study evaluates the effects of the MR modulator balcinrenone and the MRA eplerenone on kidney damage in a metabolic CKD mouse model combining nephron reduction and a 60% high-fat diet. Balcinrenone and eplerenone prevented the progression of renal damages, extracellular matrix remodeling and inflammation to a similar extent. We identified a novel mechanism linking MR activation to the renal proteoglycan deposition and inflammation via the TLR4 pathway activation. Balcinrenone and eplerenone similarly blunted this pathway activation.</p>","PeriodicalId":10475,"journal":{"name":"Clinical science","volume":" ","pages":"1025-1038"},"PeriodicalIF":6.7,"publicationDate":"2024-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141874361","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
Expression of Concern: Angiopoietin-1 gene transfer improves impaired wound healing in genetically diabetic mice without increasing VEGF expression. 表达关注:血管生成素-1 基因转移可改善遗传性糖尿病小鼠受损的伤口愈合,但不会增加血管内皮生长因子的表达。
IF 6.7 2区 医学
Clinical science Pub Date : 2024-08-21 DOI: 10.1042/CS-2007-0250_EOC
{"title":"Expression of Concern: Angiopoietin-1 gene transfer improves impaired wound healing in genetically diabetic mice without increasing VEGF expression.","authors":"","doi":"10.1042/CS-2007-0250_EOC","DOIUrl":"10.1042/CS-2007-0250_EOC","url":null,"abstract":"","PeriodicalId":10475,"journal":{"name":"Clinical science","volume":"138 16","pages":"1023"},"PeriodicalIF":6.7,"publicationDate":"2024-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11345630/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142016544","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
Endothelin-1 (ET-1) contributes to senescence and phenotypic changes in brain pericytes in diabetes-mimicking conditions. 内皮素-1(ET-1)有助于糖尿病模拟条件下脑周细胞的衰老和表型变化。
IF 6.7 2区 医学
Clinical science Pub Date : 2024-08-21 DOI: 10.1042/CS20240328
Mia Edgerton-Fulton, Yasir Abdul, Sarah Jamil, Adviye Ergul
{"title":"Endothelin-1 (ET-1) contributes to senescence and phenotypic changes in brain pericytes in diabetes-mimicking conditions.","authors":"Mia Edgerton-Fulton, Yasir Abdul, Sarah Jamil, Adviye Ergul","doi":"10.1042/CS20240328","DOIUrl":"10.1042/CS20240328","url":null,"abstract":"<p><p>Diabetes mediates endothelial dysfunction and increases the risk of Alzheimer's disease and related dementias. Diabetes also dysregulates the ET system. ET-1-mediated constriction of brain microvascular pericytes (BMVPCs) has been shown to contribute to brain hypoperfusion. Cellular senescence, a process that arrests the proliferation of harmful cells and instigates phenotypical changes and proinflammatory responses in endothelial cells that impact their survival and function. Thus, we hypothesized that ET-1 mediates BMVPC senescence and phenotypical changes in diabetes-like conditions. Human BMVPCs were incubated in diabetes-like conditions with or without ET-1 (1 µmol/L) for 3 and 7 days. Hydrogen peroxide (100 µmol/L H2O2) was used as a positive control for senescence and to mimic ischemic conditions. Cells were stained for senescence-associated β-galactosidase or processed for immunoblotting and quantitative real-time PCR analyses. In additional experiments, cells were stimulated with ET-1 in the presence or absence of ETA receptor antagonist BQ-123 (20 μmol/L) or ETB receptor antagonist BQ-788 (20 μmol/L). ET-1 stimulation increased β-galactosidase accumulation which was prevented by BQ-123. ET-1 also increased traditional senescence marker p16 protein and pericyte-specific senescence markers, TGFB1i1, PP1CA, and IGFBP7. Furthermore, ET-1 stimulated contractile protein α-SMA and microglial marker ostepontin in high glucose suggesting a shift toward an ensheathing or microglia-like phenotype. In conclusion, ET-1 triggers senescence, alters ETA and ETB receptors, and causes phenotypical changes in BMVPCs under diabetes-like conditions. These in vitro findings need to be further studied in vivo to establish the role of ETA receptors in the progression of pericyte senescence and phenotypical changes in VCID.</p>","PeriodicalId":10475,"journal":{"name":"Clinical science","volume":" ","pages":"1009-1022"},"PeriodicalIF":6.7,"publicationDate":"2024-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141893063","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
Role of mitochondria in endogenous renal repair. 线粒体在内源性肾脏修复中的作用。
IF 6.7 2区 医学
Clinical science Pub Date : 2024-08-07 DOI: 10.1042/CS20231331
Sara Kazeminia, Alfonso Eirin
{"title":"Role of mitochondria in endogenous renal repair.","authors":"Sara Kazeminia, Alfonso Eirin","doi":"10.1042/CS20231331","DOIUrl":"10.1042/CS20231331","url":null,"abstract":"<p><p>Renal tubules have potential to regenerate and repair after mild-to-moderate injury. Proliferation of tubular epithelial cells represents the initial step of this reparative process. Although for many years, it was believed that proliferating cells originated from a pre-existing intra-tubular stem cell population, there is now consensus that surviving tubular epithelial cells acquire progenitor properties to regenerate the damaged kidney. Scattered tubular-like cells (STCs) are dedifferentiated adult renal tubular epithelial cells that arise upon injury and contribute to renal self-healing and recovery by replacing lost neighboring tubular epithelial cells. These cells are characterized by the co-expression of the stem cell surface markers CD133 and CD24, as well as mesenchymal and kidney injury markers. Previous studies have shown that exogenous delivery of STCs ameliorates renal injury and dysfunction in murine models of acute kidney injury, underscoring the regenerative potential of this endogenous repair system. Although STCs contain fewer mitochondria than their surrounding terminally differentiated tubular epithelial cells, these organelles modulate several important cellular functions, and their integrity and function are critical to preserve the reparative capacity of STCs. Recent data suggest that the microenviroment induced by cardiovascular risk factors, such as obesity, hypertension, and renal ischemia may compromise STC mitochondrial integrity and function, limiting the capacity of these cells to repair injured renal tubules. This review summarizes current knowledge of the contribution of STCs to kidney repair and discusses recent insight into the key role of mitochondria in modulating STC function and their vulnerability in the setting of cardiovascular disease.</p>","PeriodicalId":10475,"journal":{"name":"Clinical science","volume":"138 15","pages":"963-973"},"PeriodicalIF":6.7,"publicationDate":"2024-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11410300/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141792166","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
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