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Zhang Z, Qiao Y, Ji J, Huang C, Shi H, Gan W, Zhang A. The potential role of differentially expressed tRNA-derived fragments in high glucose-induced podocytes. Ren Fail 2024; 46:2318413. [PMID: 38369750 PMCID: PMC10878346 DOI: 10.1080/0886022x.2024.2318413] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2023] [Accepted: 02/08/2024] [Indexed: 02/20/2024] Open
Abstract
The prevalence of diabetic kidney disease (DKD) is increasing annually. Damage to and loss of podocytes occur early in DKD. tRNA-derived fragments (tRFs), originating from tRNA precursors or mature tRNAs, are associated with various illnesses. In this study, tRFs were identified, and their roles in podocyte injury induced by high-glucose (HG) treatment were explored. High-throughput sequencing of podocytes treated with HG was performed to identify differentially expressed tRFs. Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) analyses were performed. The expression levels of nephrin, podocin, and desmin were measured in podocytes after overexpression of tRF-1:24-Glu-CTC-1-M2 (tRF-1:24) and concomitant HG treatment. A total of 647 tRFs were identified, and 89 differentially expressed tRFs (|log2FC| ≥ 0.585; p ≤ .05) were identified in the HG group, of which 53 tRFs were downregulated and 36 tRFs were upregulated. The 10 tRFs with the highest differential expression were detected by real-time quantitative polymerase chain reaction (RT-qPCR), and these results were consistent with the sequencing results. GO analysis revealed that the biological process, cellular component, and molecular function terms in which the tRFs were the most enriched were cellular processes, cellular anatomical entities, and binding. KEGG pathway analysis revealed that tRFs may be involved in signaling pathways related to growth hormones, phospholipase D, the regulation of stem cell pluripotency, and T-/B-cell receptors. Overexpression of tRF-1:24, one of the most differentially expressed tRFs, attenuated podocyte injury induced by HG. Thus, tRFs might be potential biomarkers for podocyte injury in DKD.
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Affiliation(s)
- Zhenxing Zhang
- Department of Pediatrics, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Yunyang Qiao
- Department of Pediatrics, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Jialing Ji
- Department of Pediatrics, The Fourth Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Chan Huang
- Department of Pediatrics, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Huimin Shi
- Department of Pediatrics, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Weihua Gan
- Department of Pediatrics, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Aiqing Zhang
- Department of Pediatrics, The Fourth Affiliated Hospital of Nanjing Medical University, Nanjing, China
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Zhu Y, Engmann M, Medina D, Han X, Das P, Bartke A, Ellsworth BS, Yuan R. Metformin treatment of juvenile mice alters aging-related developmental and metabolic phenotypes in sex-dependent and sex-independent manners. GeroScience 2024; 46:3197-3218. [PMID: 38227136 PMCID: PMC11009201 DOI: 10.1007/s11357-024-01067-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Accepted: 12/30/2023] [Indexed: 01/17/2024] Open
Abstract
Metformin has attracted increasing interest for its potential benefits in extending healthspan and longevity. This study examined the effects of early-life metformin treatment on the development and metabolism of C57BL/6 J (B6) mice, with metformin administered to juvenile mice from 15 to 56 days of age. Metformin treatment led to decreased body weight in both sexes (P < 0.05, t-test). At 9 weeks of age, mice were euthanized and organ weights were recorded. The relative weight of retroperitoneal fat was decreased in females, while relative weights of perigonadal and retroperitoneal fat were decreased, and relative liver weight was increased in males (P < 0.05, t-test). Glucose and insulin tolerance tests (GTT and ITT) were conducted at the age of 7 weeks. ANOVA revealed a significant impairment in insulin sensitivity by the treatment, and a significantly interactive effect on glucose tolerance between sex and treatment, underscoring a disparity in GTT between sexes in response to the treatment. Metformin treatment reduced circulating insulin levels in fasting and non-fasting conditions for male mice, with no significant alterations observed in female mice. qRT-PCR analysis of glucose metabolism-related genes (Akt2, Glut2, Glut4, Irs1, Nrip1, Pi3k, Pi3kca, Pkca) in the liver and skeletal muscle reveals metformin-induced sex- and organ-specific effects on gene expression. Comparison with previous studies in heterogeneous UM-HET3 mice receiving the same treatment suggests that genetic differences may contribute to variability in the effects of metformin treatment on development and metabolism. These findings indicate that early-life metformin treatment affects development and metabolism in both sex- and genetics-dependent manners.
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Affiliation(s)
- Yun Zhu
- Department of Internal Medicine, Southern Illinois University School of Medicine, 801 N. Rutledge, P.O. Box 19628, Springfield, IL, 62702, USA
| | - Morgan Engmann
- Department of Internal Medicine, Southern Illinois University School of Medicine, 801 N. Rutledge, P.O. Box 19628, Springfield, IL, 62702, USA
| | - David Medina
- Department of Internal Medicine, Southern Illinois University School of Medicine, 801 N. Rutledge, P.O. Box 19628, Springfield, IL, 62702, USA
| | - Xiuqi Han
- Department of Internal Medicine, Southern Illinois University School of Medicine, 801 N. Rutledge, P.O. Box 19628, Springfield, IL, 62702, USA
| | - Pratyusa Das
- Department of Physiology, Southern Illinois University SIU School of Medicine, 1135 Lincoln Drive, Life Science III, Room 2062, Carbondale, IL, 62901, USA
| | - Andrzej Bartke
- Department of Internal Medicine, Southern Illinois University School of Medicine, 801 N. Rutledge, P.O. Box 19628, Springfield, IL, 62702, USA
| | - Buffy S Ellsworth
- Department of Physiology, Southern Illinois University SIU School of Medicine, 1135 Lincoln Drive, Life Science III, Room 2062, Carbondale, IL, 62901, USA
| | - Rong Yuan
- Department of Internal Medicine, Southern Illinois University School of Medicine, 801 N. Rutledge, P.O. Box 19628, Springfield, IL, 62702, USA.
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Wang Y, Wang S, Wang Y, Wang C, Tang Y, Zhang C, Hou S, Yu D, Lin N. Glucose regulates the HMGB1 signaling pathway through SIRT1 in glioma. Cell Signal 2024; 118:111137. [PMID: 38467242 DOI: 10.1016/j.cellsig.2024.111137] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2024] [Revised: 02/28/2024] [Accepted: 03/08/2024] [Indexed: 03/13/2024]
Abstract
BACKGROUND Glucose is a fundamental substance for numerous cancers, including glioma. However, its influence on tumor cells regulatory mechanisms remains uncertain. SIRT1 is a regulator of deacetylation and a key player in the progression of malignant tumors. The objective of this study was to examine the role of glucose and SIRT1 in glioma. METHODS This study investigated the association of SIRT1 expression with clinicopathological features and prognosis in glioma patients using the TCGA database. The Western blotting technique was used to identify the expression of SIRT1 protein in glioma cells. The study also examined the impact of differing glucose concentrations on the biological functions of glioma cells. The study investigated the expression of SIRT1 and HMGB1 signaling pathways in glioma. Additionally, resilience experiments were conducted utilizing SRT1720. RESULTS SIRT1 is a gene that suppresses tumors and is low expressed in gliomas. Low expression of this gene is strongly linked to a poor prognosis in patients with glioma. High concentrations of glucose can promote the proliferation, migration, and invasion of glioma cells, while also inhibiting apoptosis. The findings of this mechanistic study provide evidence that glucose can down-regulate SIRT1 expression, leading to increased levels of acetylated HMGB1. This in turn promotes the ex-nuclear activation of HMGB1 and associated signaling pathways, ultimately driving glioma malignancy. CONCLUSION Glucose has the ability to regulate the HMGB1 associated signaling pathway through SIRT1, thus promoting glioma progression. This holds significant research value.
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Affiliation(s)
- Yu Wang
- Department of Neurosurgery, The Affiliated Chuzhou Hospital of Anhui Medical University, The First People's Hospital of Chuzhou, Chuzhou 239000, China
| | - Shuai Wang
- Department of Neurosurgery, The Affiliated Chuzhou Hospital of Anhui Medical University, The First People's Hospital of Chuzhou, Chuzhou 239000, China
| | - Yuhao Wang
- Department of Neurosurgery, The Affiliated Chuzhou Hospital of Anhui Medical University, The First People's Hospital of Chuzhou, Chuzhou 239000, China
| | - Chengcheng Wang
- Department of Neurosurgery, The Affiliated Chuzhou Hospital of Anhui Medical University, The First People's Hospital of Chuzhou, Chuzhou 239000, China
| | - Yuhang Tang
- Department of Neurosurgery, The Affiliated Chuzhou Hospital of Anhui Medical University, The First People's Hospital of Chuzhou, Chuzhou 239000, China
| | - Chao Zhang
- Department of Neurosurgery, The Affiliated Chuzhou Hospital of Anhui Medical University, The First People's Hospital of Chuzhou, Chuzhou 239000, China
| | - Shiqiang Hou
- Department of Neurosurgery, The Affiliated Chuzhou Hospital of Anhui Medical University, The First People's Hospital of Chuzhou, Chuzhou 239000, China
| | - Dong Yu
- Department of Neurosurgery, The Affiliated Chuzhou Hospital of Anhui Medical University, The First People's Hospital of Chuzhou, Chuzhou 239000, China.
| | - Ning Lin
- Department of Neurosurgery, The Affiliated Chuzhou Hospital of Anhui Medical University, The First People's Hospital of Chuzhou, Chuzhou 239000, China.
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Li X, Ji Q, Zhong C, Wu C, Wu J, Yuan C, Ran J. Ghrelin regulates the endoplasmic reticulum stress signalling pathway in gestational diabetes mellitus. Biochem Biophys Res Commun 2024; 709:149844. [PMID: 38564940 DOI: 10.1016/j.bbrc.2024.149844] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2024] [Revised: 03/09/2024] [Accepted: 03/27/2024] [Indexed: 04/04/2024]
Abstract
OBJECTIVE We aimed to investigate the effects and mechanisms of the ghrelin-regulated endoplasmic reticulum stress (ERS) signalling pathway in gestational diabetes mellitus (GDM). METHODS Pregnant female C57BL/6 mice were randomly divided into a normal group, GDM group (high-fat diet + STZ), GDM + ghrelin group (acyl ghrelin), and GDM + ghrelin + ghrelin inhibitor group ([D-lys3]-GHRP-6). We measured body weight, the intake of water and food, glucose, cholesterol, triglyceride and fasting insulin levels in each group. HE staining was used to observe the morphological changes in the pancreas. The TUNEL method was used to detect the apoptosis rate of islet cells. qPCR and Western boltting were performed to detect the relative expression levels of PERK, ATF6, IREIα, GRP78, CHOP and caspase-12, which are related to the ERS signalling pathway in the pancreas. Then, NIT-1 cells were cultured to verify whether ghrelin regulates ERS under high-glucose or tunicamycin conditions. RESULTS Compared with the GDM group, the GDM + ghrelin group showed improved physical conditions and significantly decreased the fasting blood glucose, glucose tolerance, cholesterol, triglyceride and fasting insulin levels. Damaged islet areas were inhibited by ghrelin in the GDM group. The GDM + ghrelin group showed reduced β-cell apoptosis compared to the GDM and GDM + ghrelin + ghrelin inhibitor groups. ERS-associated factors (PERK, ATF6, IREIα, GRP78, CHOP and caspase-12) mRNA and protein levels were obviously lower in the GDM + ghrelin group than in the GDM group, while expression levels were restored in the inhibitor group. Ghrelin treatment improved the high-glucose or tunicamycin-induced apoptosis, increased insulin levels and upregulation of GRP78, CHOP and caspase-12 in NIT-1 cells. CONCLUSION Ghrelin suppressed ERS signalling and apoptosis in GDM mice and in NIT-1 cells. This study established a link between ghrelin and GDM, and the targeting of ERS with ghrelin represents a promising therapeutic strategy for GDM.
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Affiliation(s)
- Xinying Li
- Department of Endocrinology, Guangzhou Red Cross Hospital Affiliated to Jinan University, Guangzhou, China; Medical Care Center, Hainan General Hospital, Hainan Affiliated Hospital of Hainan Medical University, Haikou, China
| | - Qun Ji
- Department of Endocrinology, Hainan General Hospital, Hainan Affiliated Hospital of Hainan Medical University, Haikou, China
| | - Chunrong Zhong
- Medical Care Center, Hainan General Hospital, Hainan Affiliated Hospital of Hainan Medical University, Haikou, China
| | - Congyin Wu
- Medical Care Center, Hainan General Hospital, Hainan Affiliated Hospital of Hainan Medical University, Haikou, China
| | - Jinchan Wu
- Medical Care Center, Hainan General Hospital, Hainan Affiliated Hospital of Hainan Medical University, Haikou, China
| | - Caihong Yuan
- Medical Care Center, Hainan General Hospital, Hainan Affiliated Hospital of Hainan Medical University, Haikou, China
| | - Jianmin Ran
- Department of Endocrinology, Guangzhou Red Cross Hospital Affiliated to Jinan University, Guangzhou, China.
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Li JQ, Shi YH, Min-Xu, Shi CX, Teng-Wang, Wang TH, Zuo ZF, Liu XZ. Discovery of astragaloside IV against high glucose-induced apoptosis in retinal ganglion cells: Bioinformatics and in vitro studies. Gene 2024; 905:148219. [PMID: 38286267 DOI: 10.1016/j.gene.2024.148219] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2023] [Revised: 01/22/2024] [Accepted: 01/26/2024] [Indexed: 01/31/2024]
Abstract
OBJECTIVE To examine the therapeutic mechanism of astragaloside IV (AS-IV) in the management of retinal ganglion cell (RGC) injury induced by high glucose (HG), a comprehensive approach involving the integration of network pharmacology and conducting in vitro and in vivo experiments was utilized. METHODS A rat model of diabetic retinopathy (DR) injury was created by administering streptozotocin through intraperitoneal injection. Additionally, a model of RGC injury induced by HG was established using a glucose concentration of 0.3 mmol/mL. Optical coherence tomography (OCT) images were captured 8 weeks after the injection of AS-IV. AS-IV and FBS were added to the culture medium and incubated for 48 h. The viability of cells was assessed using a CCK-8 assay, while the content of reactive oxygen species (ROS) was measured using DCFH-DA. Apoptosis was evaluated using Annexin V-PI. To identify the targets of AS-IV, hyperglycemia, and RGC, publicly available databases were utilized. The Metascape platform was employed for conducting GO and KEGG enrichment analyses. The STRING database in conjunction with Cytoscape 3.7.2 was used to determine common targets of protein-protein interactions (PPIs) and to identify the top 10 core target proteins in the RGC based on the MCC algorithm. qRT-PCR was used to measure the mRNA expression levels of the top10 core target proteins in RGCs. RESULTS OCT detection indicated that the thickness of the outer nucleus, and inner and outer accessory layers of the retina increased in the AS-IV treated retina compared to that in the DM group but decreased compared to that in the CON group. Coculturing RGC cells with AS-IV after HG induction resulted in a significant increase in cell viability and a decrease in ROS and apoptosis, suggesting that AS-IV can reduce damage to RGC cells caused by high glucose levels by inhibiting oxidative stress. There were 14 potential targets of AS-IV in the treatment of RGC damage induced by high glucose levels. The top 10 core target proteins identified by the MCC algorithm were HIF1α, AKT1, CTNNB1, SMAD2, IL6, SMAD3, IL1β, PPARG, TGFβ1, and NOTCH3. qRT-PCR analysis showed that AS-IV could upregulate the mRNA expression levels of SMAD3, TGF-β1, and NOTCH3, and downregulate the mRNA expression levels of HIF1α, AKT1, CTNNB1, SMAD2, SMAD3, and IL-1β in high glucose-induced RGC cells. CONCLUSION The findings of this study validate the efficacy of astragaloside IV in the treatment of DR and shed light on the molecular network involved. Specifically, HIF1α, AKT1, CTNNB1, SMAD2, SMAD3, and IL-1β were identified as the crucial candidate molecules responsible for the protective effects of astragaloside IV on RGCs.
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Affiliation(s)
- Jun-Qi Li
- Department of Anatomy, Histology and Embryology, Jinzhou Medical University, Jinzhou, China; Liaoning Key Laboratory of Diabetic Cognitive and Perceptive Dysfunction, Jinzhou Medical University, Jinzhou 121000, China
| | - Ya-Hui Shi
- Department of Anatomy, Histology and Embryology, Jinzhou Medical University, Jinzhou, China; Liaoning Key Laboratory of Diabetic Cognitive and Perceptive Dysfunction, Jinzhou Medical University, Jinzhou 121000, China
| | - Min-Xu
- Department of Anatomy, Histology and Embryology, Jinzhou Medical University, Jinzhou, China; Liaoning Key Laboratory of Diabetic Cognitive and Perceptive Dysfunction, Jinzhou Medical University, Jinzhou 121000, China
| | - Cai-Xing Shi
- School of Basic Medicine, Jining Medical University, Jining 272067, China
| | - Teng-Wang
- The First Affiliated Hospital of Jinzhou Medical University, 121000, China
| | - Ting-Hua Wang
- Department of Anatomy, Histology and Embryology, Jinzhou Medical University, Jinzhou, China; Institute of Neuroscience, Kunming Medical University, Kunming 650500, China.
| | - Zhong-Fu Zuo
- Department of Anatomy, Histology and Embryology, Jinzhou Medical University, Jinzhou, China; Liaoning Key Laboratory of Diabetic Cognitive and Perceptive Dysfunction, Jinzhou Medical University, Jinzhou 121000, China.
| | - Xue-Zheng Liu
- Department of Anatomy, Histology and Embryology, Jinzhou Medical University, Jinzhou, China; Liaoning Key Laboratory of Diabetic Cognitive and Perceptive Dysfunction, Jinzhou Medical University, Jinzhou 121000, China.
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6
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Chen T, Wang C, Zhu W, Yu F, Dong X, Su Y, Huang J, Huo L, Wan P. mm9_circ_014683 regulates microglia polarization through canonical NFκB signaling pathway in diabetic retinopathy. Cell Signal 2024; 117:111121. [PMID: 38417635 DOI: 10.1016/j.cellsig.2024.111121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2024] [Revised: 02/15/2024] [Accepted: 02/25/2024] [Indexed: 03/01/2024]
Abstract
Diabetic retinopathy (DR) is still the major cause of visual loss in working-aged people, one of the critical pathological processes are retinal microglia-mediated inflammation. Our previous study demonstrated that enhanced M1 microglial polarization was involved in retinal inflammation in DR, but the detailed mechanism needs further investigation. Circular RNAs (circRNAs) are important kind of noncoding RNAs involved in the regulation of various cell biological processes. Herein, the circRNA expression profiles of BV2 mouse microglia treated with or without glucose were detected, and a total of 347 differentially expressed circRNAs were identified in glucose-treated BV2 cells. The key circRNA mm9_circ_014683 increased after glucose stimulation. Inhibiting or overexpressing mm9_circ_014683 showed no effect on the proliferation and apoptosis of microglia. Inhibiting mm9_circ_014683 impeded M1 polarization and promoted M2 polarization, and overexpressing mm9_circ_014683 showed the opposite effect. A total of 216 differentially expressed genes were identified in mm9_circ_014683-knockdown BV2 cells, which were enriched in several signaling pathways, including the NFκB signaling pathway. Moreover, mm9_circ_014683 positively regulated the canonical, NFκB signaling pathway. Besides, mm9_circ_014683 was highly expressed in the retinal microglia of diabetic mice, and intraocular injection of Lv-circRNA inhibited M1 but enhanced M2 retinal microglial polarization. In conclusion, mm9_circ_014683 regulates microglial polarization through the canonical NFκB signaling pathway in diabetic retinopathy. This study may provide insight into the pathogenesis and treatment of DR.
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Affiliation(s)
- Tingting Chen
- Department of Ophthalmology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou 510080, Guangdong Province, China
| | - Congyao Wang
- Department of Ophthalmology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou 510080, Guangdong Province, China
| | - Wenhui Zhu
- Department of Ophthalmology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou 510080, Guangdong Province, China
| | - Fenfen Yu
- Department of Ophthalmology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou 510080, Guangdong Province, China
| | - Xia Dong
- Department of Ophthalmology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou 510080, Guangdong Province, China
| | - Yihua Su
- Department of Ophthalmology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou 510080, Guangdong Province, China
| | - Jingwen Huang
- Department of Ophthalmology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou 510080, Guangdong Province, China
| | - Lijun Huo
- Department of Ophthalmology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou 510080, Guangdong Province, China.
| | - Pengxia Wan
- Department of Ophthalmology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou 510080, Guangdong Province, China.
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Plosker A, Frishman WIH. Sodium-Glucose Co-transporter 2 Inhibitors in Patients with Heart Failure with Preserved Ejection Fraction: Proposed Mechanisms, Recent Evidence, and Clinical Implications. Cardiol Rev 2024; 32:263-266. [PMID: 36728757 DOI: 10.1097/crd.0000000000000501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Heart failure (HF) affects approximately 6 million Americans and is projected to increase in prevalence as the population ages. While progress has been made in the treatment of heart failure with reduced ejection fraction (HFrEF), treatments for heart failure with preserved ejection fraction (HFpEF) are few and far between. Since HFpEF makes up half of all heart failure cases, its management may be the biggest unmet need in cardiology. Results from the recent EMPEROR-Preserved trial are encouraging. After 26 months, patients with HFpEF who used the sodium-glucose co-transporter 2 inhibitor empagliflozin had a lower risk of hospitalization for HF than patients taking a placebo. However, the trial did not show empagliflozin to reduce the risk of cardiovascular death, unlike the EMPEROR-Reduced trial, in which empagliflozin was associated with a reduced risk of both cardiac death and hospitalization for patients with HFrEF. The outcomes of these trials highlight the dissimilarities between the two diseases. While HFrEF is mainly a disease of cardiomyocyte injury and systolic dysfunction, HFpEF is a multifactorial syndrome of inflammation and endothelial dysfunction stemming from chronic diseases like hypertension, diabetes and obesity. While trials of empagliflozin for HFpEF did not show a mortality benefit, sodium-glucose co-transporter 2 inhibitors are promising additions to the management of HFpEF for their effects on the disease's risk factors through weight loss, natriuresis, blood pressure lowering, and glycemic control.
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Affiliation(s)
- Aaron Plosker
- From the Department of Medicine, Rutgers New Jersey Medical School, Newark, NJ
| | - WIlliam H Frishman
- Department of Medicine, New York Medical College/Westchester Medical Center, Valhalla, NY
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Wang XL, Xian Y, Chen XL. YAP/TAZ Signaling Enhances Angiogenesis of Retinal Microvascular Endothelial Cells in a High-Glucose Environment. Curr Eye Res 2024; 49:524-532. [PMID: 38305219 DOI: 10.1080/02713683.2024.2309217] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Accepted: 01/12/2024] [Indexed: 02/03/2024]
Abstract
PURPOSE Diabetic retinopathy (DR) is a major cause of irreversible blindness in the working-age population. Neovascularization is an important hallmark of advanced DR. There is evidence that Yes-associated protein (YAP)/transcriptional co-activator with a PDZ binding domain (TAZ) plays an important role in angiogenesis and that its activity is regulated by vascular endothelial growth factor (VEGF). Therefore, the aim of this study was to investigate the effect of YAP/TAZ-VEGF crosstalk on the angiogenic capacity of human retinal microvascular endothelial cells (hRECs) in a high-glucose environment. METHODS The expression of YAP and TAZ of hRECs under normal conditions, hypertonic conditions and high glucose were observed. YAP overexpression (OE-YAP), YAP silencing (sh-YAP), VEGF overexpression (OE-VEGF) and VEGF silencing (sh-VEGF) plasmids were constructed. Cell counting kit-8 assay was performed to detect cells proliferation ability, transwell assay to detect cells migration ability, and tube formation assay to detect tube formation ability. The protein expression of YAP, TAZ, VEGF, matrix metalloproteinase (MMP)-8, MMP-13, vessel endothelium (VE)-cadherin and alpha smooth muscle actin (α-SMA) was measured by western blot. RESULTS The proliferation of hRECs was significantly higher in the high glucose group compared with the normal group, as well as the protein expression of YAP and TAZ (p < 0.01). YAP and VEGF promoted the proliferation, migration and tube formation of hRECs in the high glucose environment (p < 0.01), and increased the expression of TAZ, VEGF, MMP-8, MMP-13 and α-SMA while reducing the expression of VE-cadherin (p < 0.01). Knockdown of YAP effectively reversed the above promoting effects of OE-VEGF (p < 0.01) and overexpression of YAP significantly reversed the inhibition effects of sh-VEGF on above cell function (p < 0.01). CONCLUSION In a high-glucose environment, YAP/TAZ can significantly promote the proliferation, migration and tube formation ability of hRECs, and the mechanism may be related to the regulation of VEGF expression.
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Affiliation(s)
- Xing-Li Wang
- Department of Ophthalmology, Shengjing Hospital of China Medical University, Shenyang, China
| | - Yang Xian
- Department of Ophthalmology, Shengjing Hospital of China Medical University, Shenyang, China
| | - Xiao-Long Chen
- Department of Ophthalmology, Shengjing Hospital of China Medical University, Shenyang, China
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Cruz-López EO, Ye D, Stolk DG, Clahsen-van Groningen MC, van Veghel R, Garrelds IM, Poglitsch M, Domenig O, Alipour Symakani RS, Merkus D, Verdonk K, Jan Danser AH. Combining renin-angiotensin system blockade and sodium-glucose cotransporter-2 inhibition in experimental diabetes results in synergistic beneficial effects. J Hypertens 2024; 42:883-892. [PMID: 38088400 DOI: 10.1097/hjh.0000000000003633] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/05/2024]
Abstract
BACKGROUND Sodium-glucose cotransporter-2 (SGLT2) inhibition exerts cardioprotective and renoprotective effects, often on top of renin-angiotensin system (RAS) blockade. We investigated this in diabetic hypertensive (mREN2)27 rats. METHODS Rats were made diabetic with streptozotocin and treated with vehicle, the angiotensin receptor blocker valsartan, the SGLT2 inhibitor empagliflozin, or their combination. Blood pressure (BP) was measured by telemetry. RESULTS Diabetes resulted in albuminuria, accompanied by glomerulosclerosis, without a change in glomerular filtration rate. Empagliflozin did not lower BP, while valsartan did, and when combined the BP drop was largest. Only dual blockade reduced cardiac hypertrophy and prevented left ventricular dilatation. Valsartan, but not empagliflozin, increased renin, and the largest renin rise occurred during dual blockade, resulting in plasma angiotensin II [but not angiotensin-(1-7)] upregulation. In contrast, in the kidney, valsartan lowered angiotensin II and angiotensin-(1-7), and empagliflozin did not alter this. Although both valsartan and empagliflozin alone tended to diminish albuminuria, the reduction was significant only when both drugs were combined. This was accompanied by reduced glomerulosclerosis, no change in glomerular filtration rate, and a favorable expression pattern of fibrosis and inflammatory markers (including SGLT2) in the kidney. CONCLUSION RAS blockade and SGLT2 inhibition display synergistic beneficial effects on BP, kidney injury and cardiac hypertrophy in a rat with hypertension and diabetes. The synergy does not involve upregulation of angiotensin-(1-7), but may relate to direct RAS-independent effects of empagliflozin in the heart and kidney.
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Affiliation(s)
- Edwyn O Cruz-López
- Division of Vascular Medicine and Pharmacology, Department of Internal Medicine
| | - Dien Ye
- Division of Vascular Medicine and Pharmacology, Department of Internal Medicine
| | - Daniel G Stolk
- Division of Vascular Medicine and Pharmacology, Department of Internal Medicine
| | | | - Richard van Veghel
- Division of Vascular Medicine and Pharmacology, Department of Internal Medicine
| | - Ingrid M Garrelds
- Division of Vascular Medicine and Pharmacology, Department of Internal Medicine
| | | | | | - Rahi S Alipour Symakani
- Division of Experimental Cardiology, Department of Cardiology
- Department of Cardiothoracic Surgery
- Division of Pediatric Cardiology, Department of Pediatrics, Sophia Children's Hospital, Erasmus University Medical Center, The Netherlands
| | - Daphne Merkus
- Division of Experimental Cardiology, Department of Cardiology
- Institute of Surgical Research at the Walter-Brendel-Centre of Experimental Medicine, LMU University Hospital, LMU Munich
- Center for Cardiovascular Research (DZHK), Munich Heart Alliance (MHA), Partner Site Munich, 81377 Munich, Germany
| | - Koen Verdonk
- Division of Vascular Medicine and Pharmacology, Department of Internal Medicine
| | - A H Jan Danser
- Division of Vascular Medicine and Pharmacology, Department of Internal Medicine
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10
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Zhang C, Li S, Li L, Wang R, Luo S, Li G. Stevioside Ameliorates Palmitic Acid-Induced Abnormal Glucose Uptake via the PDK4/AMPK/TBC1D1 Pathway in C2C12 Myotubes. Endocrinol Diabetes Metab 2024; 7:e00482. [PMID: 38556697 PMCID: PMC10982459 DOI: 10.1002/edm2.482] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2023] [Revised: 02/04/2024] [Accepted: 03/05/2024] [Indexed: 04/02/2024] Open
Abstract
BACKGROUND Stevioside (SV) with minimal calories is widely used as a natural sweetener in beverages due to its high sweetness and safety. However, the effects of SV on glucose uptake and the pyruvate dehydrogenase kinase isoenzyme (PDK4) as an important protein in the regulation of glucose metabolism, remain largely unexplored. In this study, we used C2C12 skeletal muscle cells that was induced by palmitic acid (PA) to assess the effects and mechanisms of SV on glucose uptake and PDK4. METHODS The glucose uptake of C2C12 cells was determined by 2-NBDG; expression of the Pdk4 gene was measured by quantitative real-time PCR; and expression of the proteins PDK4, p-AMPK, TBC1D1 and GLUT4 was assessed by Western blotting. RESULTS In PA-induced C2C12 myotubes, SV could significantly promote cellular glucose uptake by decreasing PDK4 levels and increasing p-AMPK and TBC1D1 levels. SV could promote the translocation of GLUT4 from the cytoplasm to the cell membrane in cells. Moreover, in Pdk4-overexpressing C2C12 myotubes, SV decreased the level of PDK4 and increased the levels of p-AMPK and TBC1D1. CONCLUSION SV was found to ameliorate PA-induced abnormal glucose uptake via the PDK4/AMPK/TBC1D1 pathway in C2C12 myotubes. Although these results warranted further investigation for validation, they may provide some evidence of SV as a safe natural sweetener for its use in sugar-free beverages to prevent and control T2DM.
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Affiliation(s)
- Changfa Zhang
- Center for Clinical Epidemiology and Methodology (CCEM)Guangdong Second Provincial General HospitalGuangzhouChina
| | - Shuai Li
- Center for Clinical Epidemiology and Methodology (CCEM)Guangdong Second Provincial General HospitalGuangzhouChina
| | - Likang Li
- Center for Clinical Epidemiology and Methodology (CCEM)Guangdong Second Provincial General HospitalGuangzhouChina
| | - Ruoting Wang
- Center for Clinical Epidemiology and Methodology (CCEM)Guangdong Second Provincial General HospitalGuangzhouChina
| | - Shiming Luo
- Fertility Preservation Lab, Guangdong‐Hong Kong Metabolism and Reproduction Joint Laboratory, Reproductive Medicine CenterGuangdong Second Provincial General HospitalGuangzhouChina
| | - Guowei Li
- Center for Clinical Epidemiology and Methodology (CCEM)Guangdong Second Provincial General HospitalGuangzhouChina
- Department of Health Research Methods, Evidence, and Impact (HEI)McMaster UniversityHamiltonOntarioCanada
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11
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Zhu M, Li P, Xu T, Zhang G, Xu Z, Wang X, Zhao L, Yang H. Combined exposure to lead and microplastics increased risk of glucose metabolism in mice via the Nrf2/NF-κB pathway. Environ Toxicol 2024; 39:2502-2511. [PMID: 38180308 DOI: 10.1002/tox.24125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2023] [Revised: 12/13/2023] [Accepted: 12/25/2023] [Indexed: 01/06/2024]
Abstract
The purpose of this study was to explore the effects of combined lead (Pb) and two types of microplastic (MP) (polyvinyl chloride [PVC] and polyethylene [PE]) exposure on glucose metabolism and investigate the role of the nuclear factor erythroid 2-related factor 2 (Nrf2)/nuclear factor-kappa B (NF-κB) signaling pathway in mediating these effects in mice. Adult C57BL/6J mice were randomly divided into four groups: control, Pb (100 mg/L), MPs (containing 10 mg/L PE and PVC), and Pb + MPs, each of which was treated with drinking water. Treatments were conducted for 6 weeks. Co-exposure to Pb + MPs exhibited increase glycosylated serum protein levels, insulin resistance, and damaged glucose tolerance compared with the control mice. Additionally, treatment with Pb + MPs caused more severe damage to hepatocytes than when exposed to them alone concomitantly, exposed to Pb + MPs exhibited improved the levels of interleukin-6, tumor necrosis factor-alpha, and malondialdehyde, but reduced superoxide dismutase, glutathione peroxidase, and catalase assay in livers. Furthermore, they increase the Kelch-like ECH-associated protein 1 (Keap1) and phosphorylated p-NF-κB protein levels but reduced the protein levels of heme oxygenase-1 and Nrf2, as well as increased Keap1 mRNA and Nrf2 mRNA. Co-exposure to Pb + MP impacts glucose metabolism via the Nrf2 /NF-κB pathway.
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Affiliation(s)
- Mengqiang Zhu
- Linyi Hedong District Maternal and Child Health Care Hospital, Linyi, China
| | - Peng Li
- Linyi Hedong District Maternal and Child Health Care Hospital, Linyi, China
| | | | - Guoyun Zhang
- Linyi Hedong District Maternal and Child Health Care Hospital, Linyi, China
| | - Zhuo Xu
- Linyi People's Hospital, Linyi, China
| | - Xiangrong Wang
- Linyi Hedong District Maternal and Child Health Care Hospital, Linyi, China
| | - Lulu Zhao
- Linyi Hedong District Maternal and Child Health Care Hospital, Linyi, China
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12
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Kumar R, Singh MV, Shrivastava A, Yadav RK, Siddiqui SA, Sachan R, Maurya M, Mishra N, Shukla SK, Sonkar M. Renal Adverse Effects of Tenofovir Containing Regimens in HIV-Infected Children and Adolescents in North India. Indian Pediatr 2024; 61:337-342. [PMID: 38449277] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/08/2024]
Abstract
OBJECTIVE To study the prevalence of abnormal renal functions among children living with HIV (CLHIV) receiving tenofovir disoproxil fumarate (TDF) containing antiretroviral therapy (ART). METHODS A prospective, observational study was conducted among CLHIV aged 10 years to 21 years attending the pediatric HIV clinic. We included CLHIV weighing ≥ 30 kg who had been receiving TDF-containing regimens for at least 6 months, with estimated glomerular filtration rate (eGFR) > 60 ml/min/m2 at enrolment and for whom baseline laboratory parameters were available before starting ART. Clinical and laboratory parameters like serum creatinine, serum phosphate, urinary protein and glucose estimation, CD4 count and viral load were noted from records. The mean change in serum creatinine, estimated glomerular filtration rate (eGFR), creatinine clearance, serum phosphate, and presence of urinary glucose and protein by dipstick were assessed at 3- and 12-months follow-up. RESULTS We enrolled 70 patients with mean (SD) age 14.99 (2.45) years who had been receiving TDF-based ART for a mean (SD) duration of 14.60 (12.80) months. At 3-months and 12-months follow-up, 32.85% and 41.42% patients, respectively, had eGFR below 90 mL/min/1.73m2, while 4.2% and 2.8% patients, respectively, had eGFR between 50-60 mL/min/1.73m2. One patient had creatinine clearance below 50 mL/min/1.73m2. Four patients had hypophosphatemia at the first and last follow-up respectively, and five patients had proteinuria. There was no statistically significant change in CD4 counts, serum potassium, or serum uric acid during study duration. CONCLUSION TDF-containing ART regimen is associated with decreased eGFR, creatinine clearance and proteinuria.
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Affiliation(s)
- Ravindra Kumar
- Department of Pediatrics, SN Children Hospital, Prayagraj, Uttar Pradesh, India
| | - Mukesh Vir Singh
- Department of Pediatrics, SN Children Hospital, Prayagraj, Uttar Pradesh, India
| | - Anubha Shrivastava
- Department of Pediatrics, SN Children Hospital, Prayagraj, Uttar Pradesh, India
| | - Rajesh Kumar Yadav
- Department of Pediatrics, SN Children Hospital, Prayagraj, Uttar Pradesh, India
| | - Shahid Akhtar Siddiqui
- Department of Pediatrics, SN Children Hospital, Prayagraj, Uttar Pradesh, India. Correspondence to: Dr. Shahid Akhtar Siddiqui, Assistant Professor, Department of Pediatrics, SN Children Hospital, MLN Medical College, Prayagraj, Uttar Pradesh, India.
| | - Reena Sachan
- Department of Microbiology, MLN Medical College, Prayagraj, Uttar Pradesh, India
| | - Manisha Maurya
- Department of Pediatrics, SN Children Hospital, Prayagraj, Uttar Pradesh, India
| | - Nandita Mishra
- Department of Pediatrics, SN Children Hospital, Prayagraj, Uttar Pradesh, India
| | | | - Madhu Sonkar
- Department of Pediatrics, SN Children Hospital, Prayagraj, Uttar Pradesh, India
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13
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Arkelius K, Wendt TS, Andersson H, Arnou A, Gottschalk M, Gonzales RJ, Ansar S. LOX-1 and MMP-9 Inhibition Attenuates the Detrimental Effects of Delayed rt-PA Therapy and Improves Outcomes After Acute Ischemic Stroke. Circ Res 2024; 134:954-969. [PMID: 38501247 DOI: 10.1161/circresaha.123.323371] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/08/2023] [Accepted: 03/06/2024] [Indexed: 03/20/2024]
Abstract
BACKGROUND Acute ischemic stroke triggers endothelial activation that disrupts vascular integrity and increases hemorrhagic transformation leading to worsened stroke outcomes. rt-PA (recombinant tissue-type plasminogen activator) is an effective treatment; however, its use is limited due to a restricted time window and hemorrhagic transformation risk, which in part may involve activation of MMPs (matrix metalloproteinases) mediated through LOX-1 (lectin-like oxLDL [oxidized low-density lipoprotein] receptor 1). This study's overall aim was to evaluate the therapeutic potential of novel MMP-9 (matrix metalloproteinase 9) ± LOX-1 inhibitors in combination with rt-PA to improve stroke outcomes. METHODS A rat thromboembolic stroke model was utilized to investigate the impact of rt-PA delivered 4 hours poststroke onset as well as selective MMP-9 (JNJ0966) ±LOX-1 (BI-0115) inhibitors given before rt-PA administration. Infarct size, perfusion, and hemorrhagic transformation were evaluated by 9.4-T magnetic resonance imaging, vascular and parenchymal MMP-9 activity via zymography, and neurological function was assessed using sensorimotor function testing. Human brain microvascular endothelial cells were exposed to hypoxia plus glucose deprivation/reperfusion (hypoxia plus glucose deprivation 3 hours/R 24 hours) and treated with ±tPA and ±MMP-9 ±LOX-1 inhibitors. Barrier function was assessed via transendothelial electrical resistance, MMP-9 activity was determined with zymography, and LOX-1 and barrier gene expression/levels were measured using qRT-PCR (quantitative reverse transcription PCR) and Western blot. RESULTS Stroke and subsequent rt-PA treatment increased edema, hemorrhage, MMP-9 activity, LOX-1 expression, and worsened neurological outcomes. LOX-1 inhibition improved neurological function, reduced edema, and improved endothelial barrier integrity. Elevated MMP-9 activity correlated with increased edema, infarct volume, and decreased neurological function. MMP-9 inhibition reduced MMP-9 activity and LOX-1 expression. In human brain microvascular endothelial cells, LOX-1/MMP-9 inhibition differentially attenuated MMP-9 levels, inflammation, and activation following hypoxia plus glucose deprivation/R. CONCLUSIONS Our findings indicate that LOX-1 inhibition and ± MMP-9 inhibition attenuate negative aspects of ischemic stroke with rt-PA therapy, thus resulting in improved neurological function. While no synergistic effect was observed with simultaneous LOX-1 and MMP-9 inhibition, a distinct interaction is evident.
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Affiliation(s)
- Kajsa Arkelius
- Applied Neurovascular Research, Neurosurgery, Department of Clinical Sciences, Lund University, Sweden (K.A., H.A., A.A., S.A.)
| | - Trevor S Wendt
- Department of Basic Medical Sciences, University of Arizona College of Medicine, Phoenix, AZ (T.S.W., R.J.G.)
| | - Henrik Andersson
- Applied Neurovascular Research, Neurosurgery, Department of Clinical Sciences, Lund University, Sweden (K.A., H.A., A.A., S.A.)
| | - Anaële Arnou
- Applied Neurovascular Research, Neurosurgery, Department of Clinical Sciences, Lund University, Sweden (K.A., H.A., A.A., S.A.)
| | | | - Rayna J Gonzales
- Department of Basic Medical Sciences, University of Arizona College of Medicine, Phoenix, AZ (T.S.W., R.J.G.)
| | - Saema Ansar
- Applied Neurovascular Research, Neurosurgery, Department of Clinical Sciences, Lund University, Sweden (K.A., H.A., A.A., S.A.)
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14
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Nahar A, Becker J, Pasquariello R, Herrick J, Rogers H, Zhang M, Schoolcraft W, Krisher RL, Yuan Y. FGF2, LIF, and IGF-1 supplementation improves mouse oocyte in vitro maturation via increased glucose metabolism†. Biol Reprod 2024; 110:672-683. [PMID: 38263524 DOI: 10.1093/biolre/ioae014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Revised: 12/22/2023] [Accepted: 01/15/2024] [Indexed: 01/25/2024] Open
Abstract
Chemically defined oocyte maturation media supplemented with FGF2, LIF, and IGF-1 (FLI medium) enabled significantly improved oocyte quality in multiple farm animals, yet the molecular mechanisms behind such benefits were poorly defined. Here, we first demonstrated that FLI medium enhanced mouse oocyte quality assessed by blastocyst formation after in vitro fertilization and implantation and fetal development after embryo transfer. We then analyzed the glucose concentrations in the spent media; reactive oxygen species concentrations; mitochondrial membrane potential; spindle morphology in oocytes; and the abundance of transcripts of endothelial growth factor-like factors, cumulus expansion factors, and glucose metabolism-related genes in cumulus cells. We found that FLI medium enabled increased glucose metabolism through glycolysis, pentose phosphate pathway, and hexosamine biosynthetic pathway, as well as more active endothelial growth factor-like factor expressions in cumulus cells, resulting in improved cumulus cell expansion, decreased spindle abnormality, and overall improvement in oocyte quality. In addition, the activities of MAPK1/3, PI3K/AKT, JAK/STAT3, and mTOR signaling pathways in cumulus cells were assessed by the phosphorylation of MAPK1/3, AKT, STAT3, and mTOR downstream target RPS6KB1. We demonstrated that FLI medium promoted activations of all these signaling pathways at multiple different time points during in vitro maturation.
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Affiliation(s)
- Asrafun Nahar
- Colorado Center for Reproductive Medicine, Lone Tree, CO, USA
| | - John Becker
- Colorado Center for Reproductive Medicine, Lone Tree, CO, USA
| | - Rolando Pasquariello
- Colorado Center for Reproductive Medicine, Lone Tree, CO, USA
- Department of Agricultural and Environmental Sciences, University of Milan, Milan, Italy
| | - Jason Herrick
- Colorado Center for Reproductive Medicine, Lone Tree, CO, USA
- Omaha's Henry Doorly Zoo and Aquarium, Omaha, NE, USA
| | - Heather Rogers
- Colorado Center for Reproductive Medicine, Lone Tree, CO, USA
| | - Mingxiang Zhang
- Colorado Center for Reproductive Medicine, Lone Tree, CO, USA
| | | | - Rebecca L Krisher
- Colorado Center for Reproductive Medicine, Lone Tree, CO, USA
- Genus Plc, DeForest, WI, USA
| | - Ye Yuan
- Colorado Center for Reproductive Medicine, Lone Tree, CO, USA
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15
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Rajalekshmy GP, Ramesan RM, Geetha CS, Pratheesh KV, Shenoy SJ, Anilkumar TV. In Vivo Wound-Healing Efficacy of Insulin-Loaded Strontium-Cross-Linked Alginate-Based Hydrogels in Diabetic Rats. ACS Biomater Sci Eng 2024; 10:2552-2566. [PMID: 38450650 DOI: 10.1021/acsbiomaterials.3c01692] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/08/2024]
Abstract
The wound-healing effect of insulin is well studied and reported. However, prolonged topical application of insulin without compromising its biological activity is still a challenge. In this study, the effect of topically delivered insulin on promoting wound healing in diabetic animals was evaluated. Alginate diamine PEG-g-poly(PEGMA) (ADPM2S2) was the material used for the topical delivery of insulin. ADPM2S2 hydrogels release insulin and strontium ions, and they synergistically act to regulate different phases of wound healing. Insulin was released from the ADPM2S2 hydrogel for a period of 48 h, maintaining its structural stability and biological activity. In vitro studies were performed under high-glucose conditions to evaluate the wound-healing potential of insulin. Insulin-loaded ADPM2S2 hydrogels showed significant improvement in cell migration, proliferation, and collagen deposition, compared to control cells under high-glucose conditions. Immunostaining studies in L929 cells showed a reduction in phospho Akt expression under high-glucose conditions, and in the presence of insulin, the expression increased. The gene expression studies revealed that insulin plays an important role in regulating the inflammatory phase and macrophage polarization, which favors accelerated wound closure. In vivo experiments in diabetic rat excision wounds treated with insulin-loaded ADPM2S2 showed 95% wound closure within 14 days compared with 82% in control groups. Thus, both the in vitro and in vivo results signify the therapeutic potential of topically delivered insulin in wound management under high-glucose conditions.
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Affiliation(s)
- G P Rajalekshmy
- Division of Biosurface Technology, Biomedical Technology Wing, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Poojappura, Thiruvananthapuram 695012, Kerala, India
| | - Rekha M Ramesan
- Division of Biosurface Technology, Biomedical Technology Wing, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Poojappura, Thiruvananthapuram 695012, Kerala, India
| | - C Surendran Geetha
- Experimental Pathology, Biomedical Technology Wing, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Poojappura, Thiruvananthapuram 695012, Kerala, India
| | - Kanakarajan V Pratheesh
- Experimental Pathology, Biomedical Technology Wing, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Poojappura, Thiruvananthapuram 695012, Kerala, India
| | - Sachin J Shenoy
- Division of In Vivo Models and Testing, Biomedical Technology Wing, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Poojappura, Thiruvananthapuram 695012, Kerala, India
| | - Thapasimuthu V Anilkumar
- Experimental Pathology, Biomedical Technology Wing, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Poojappura, Thiruvananthapuram 695012, Kerala, India
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16
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Tian R, Liu X, Xiao Y, Jing L, Tao H, Yang L, Meng X. Huang-Lian-Jie-Du decoction drug-containing serum inhibits IL-1β secretion from D-glucose and PA induced BV2 cells via autophagy/NLRP3 signaling. J Ethnopharmacol 2024; 323:117686. [PMID: 38160864 DOI: 10.1016/j.jep.2023.117686] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2023] [Revised: 12/16/2023] [Accepted: 12/27/2023] [Indexed: 01/03/2024]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Huang-Lian-Jie-Du decoction (HLJDD), a famous traditional Chinese medicine prescription with heat-clearing and detoxifying effects, has been widely used to treat diabetes, dementia, stroke, and other diseases. However, the detailed mechanisms of HLJDD against type 2 diabetes associated cognitive dysfunction (DACD) through inhibiting interleukin-1β (IL-1β) mediated neuroinflammation remain to be further elucidated. AIM OF THE STUDY The aim of this study was to investigate the effect and potential mechanism of HLJDD on IL-1β secretion in a DACD model of BV2 cells induced by D-glucose and palmitic acid (PA). MATERIALS AND METHOD sUltra-performance liquid chromatography-quadrupole/electrostatic field orbital well high-resolution mass spectrometry technology was used to analyze the compounds in HLJDD drug-containing serum. The cytotoxicity was detected by cell counting kit-8. Enzyme-linked immunosorbent assay was used to measure the secretion of IL-1β in BV2 cells. Reactive oxygen species, glutathione, superoxide dismutase, and malondialdehyde kits were used to detect the intracellular oxidative stress levels. The autophagy level was determined by autophagy staining kit and transmission electron microscope. The expression levels of autophagy-related 7 (Atg7), P62, LC3, nucleotide-binding domain, leucine-rich-containing family, pyrin domain-containing-3(NLRP3), Caspase1, and IL-1β were detected by real-time PCR, immunofluorescence, and western blotting. The Atg7siRNA was transfected into BV2 cells to produce autophagy inhibitory effect. Then the effect of HLJDD drug-containing serum on IL-1β secretion in D-glucose and PA induced BV2 cells and the potential mechanism of autophagy-NLRP3 inflammasome activation were further observed. RESULTS Eighty-eight compounds were preliminarily identified in HLJDD drug-containing serum, among which geniposide, baicalin, palmatine, berberine, wogonoside, wogonin, and geniposidic acid were identified as the main prototype components of HLJDD into the blood. In this study, the DACD model of BV2 cells induced by high concentrations of glucose and PA was successfully constructed. HLJDD drug-containing serum significantly reduced the secretion of IL-1β and the activity of NLRP3 inflammasome with improving the oxidative stress level. Interestingly, the enhanced autophagy level was also found. After transfection of Atg7siRNA into BV2 cells, the effect of HLJDD drug-containing serum on autophagy promotion was reversed, but the inhibitory effects on IL-1β secretion, NLRP3 inflammasome activation, and oxidative stress were reduced. CONCLUSIONS These results indicated that the inhibition of HLJDD drug-containing serum on the IL-1β secretion in D-glucose and PA induced BV2 cells was related to autophagy promotion, the decreased NLRP3 inflammasome activation, and the improved oxidative stress. Moreover, the improvement of HLJDD drug-containing serum on IL-1β secretion, NLRP3 inflammasome activation, and oxidative stress were all closely associated with Atg7 mediated autophagy promotion. Geniposide, baicalin, palmatine, berberine, wogonoside, wogonin, and geniposidic acid may be the potential active ingredients of HLJDD drug-containing serum.
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Affiliation(s)
- Ruimin Tian
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, China; Department of Pharmacology, North Sichuan Medical College, Nanchong, 637000, China
| | - Xianfeng Liu
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, China
| | - Yang Xiao
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, China
| | - Lijia Jing
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, China
| | - Honglin Tao
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, China
| | - Lu Yang
- Innovative Institute of Chinese Medicine and Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, China.
| | - Xianli Meng
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, China; Innovative Institute of Chinese Medicine and Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, China.
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17
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Okoh VI, Campos HM, Yasmin de Oliveira Ferreira P, Pereira RM, Souza Silva Y, Arruda EL, Pagliarani B, de Almeida Ribeiro Oliveira G, Lião LM, Franco Dos Santos G, Vaz BG, Sabino JR, Alcantara Dos Santos FC, Costa EA, Tarozzi A, Menegatti R, Ghedini PC. Chrysin bonded to β-d-glucose tetraacetate enhances its protective effects against the neurotoxicity induced by aluminum in Swiss mice. J Pharm Pharmacol 2024; 76:368-380. [PMID: 38330395 DOI: 10.1093/jpp/rgae011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2023] [Accepted: 01/08/2024] [Indexed: 02/10/2024]
Abstract
OBJECTIVES To evaluate whether the glycosylation of chrysin (CHR) enhances its protective effects against aluminum-induced neurotoxicity. METHODS To compare the antioxidant, anticholinesterase, and behavioral effects of CHR with its glycosylated form (CHR bonded to β-d-glucose tetraacetate, denoted as LQFM280), we employed an integrated approach using both in vitro (SH-SY5Y cells) and in vivo (aluminum-induced neurotoxicity in Swiss mice) models. KEY FINDINGS LQFM280 demonstrated higher antioxidant activity than CHR in both models. Specifically, LQFM280 exhibited the ability to exert antioxidant effects in the cytoplasm of SH-SY5Y cells, indicating its competence in traversing neuronal membranes. Remarkably, LQFM280 proved more effective than CHR in recovering memory loss and counteracting neuronal death in the aluminum chloride mice model, suggesting its increased bioavailability at the brain level. CONCLUSIONS The glycosylation of CHR with β-d-glucose tetraacetate amplifies its neuroprotective effects, positioning LQFM280 as a promising lead compound for safeguarding against neurodegenerative processes involving oxidative stress.
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Affiliation(s)
- Victor Ifeanyi Okoh
- Institute of Biological Sciences, Federal University of Goias, Goiania, GO, Brazil
| | | | | | - Robbert Mota Pereira
- Institute of Biological Sciences, Federal University of Goias, Goiania, GO, Brazil
| | - Yohanny Souza Silva
- Institute of Biological Sciences, Federal University of Goias, Goiania, GO, Brazil
| | | | - Barbara Pagliarani
- Department for Life Quality Studies, Alma Mater Studiorum - University of Bologna, Rimini, Italy
| | | | | | | | - Boniek Gontijo Vaz
- Institute of Chemistry, Federal University of Goias, Goiania, GO, Brazil
| | | | | | - Elson Alves Costa
- Institute of Biological Sciences, Federal University of Goias, Goiania, GO, Brazil
| | - Andrea Tarozzi
- Department for Life Quality Studies, Alma Mater Studiorum - University of Bologna, Rimini, Italy
| | - Ricardo Menegatti
- Faculty of Pharmacy, Federal University of Goias, Goiania, GO, Brazil
| | - Paulo César Ghedini
- Institute of Biological Sciences, Federal University of Goias, Goiania, GO, Brazil
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18
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Ali MY, Zamponi GW, Abdul QA, Seong SH, Min BS, Jung HA, Choi JS. Prunin from Poncirus trifoliata (L.) Rafin Inhibits Aldose Reductase and Glucose-Fructose-Mediated Protein Glycation and Oxidation of Human Serum Albumin. J Agric Food Chem 2024; 72:7203-7218. [PMID: 38518258 DOI: 10.1021/acs.jafc.3c09716] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/24/2024]
Abstract
Diabetes complications are associated with aldose reductase (AR) and advanced glycation end products (AGEs). Using bioassay-guided isolation by column chromatography, 10 flavonoids and one coumarin were isolated from Poncirus trifoliata Rafin and tested in vitro for an inhibitory effect against human recombinant AR (HRAR) and rat lens AR (RLAR). Prunin, narirutin, and naringin inhibited RLAR (IC50 0.48-2.84 μM) and HRAR (IC50 0.68-4.88 μM). Docking simulations predicted negative binding energies and interactions with the RLAR and HRAR binding pocket residues. Prunin (0.1 and 12.5 μM) prevented the formation of fluorescent AGEs and nonfluorescent Nε-(carboxymethyl) lysine (CML), as well as the fructose-glucose-mediated protein glycation and oxidation of human serum albumin (HSA). Prunin suppressed the formation of the β-cross-amyloid structure of HSA. These results indicate that prunin inhibits oxidation-dependent protein damage, AGE formation, and AR, which may help prevent diabetes complications.
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Affiliation(s)
- Md Yousof Ali
- Department of Clinical Neurosciences, Hotchkiss Brain Institute and Alberta Children's Hospital Research Institute, Cumming School of Medicine, University of Calgary, Calgary T2N 4N1, AB, Canada
| | - Gerald W Zamponi
- Department of Clinical Neurosciences, Hotchkiss Brain Institute and Alberta Children's Hospital Research Institute, Cumming School of Medicine, University of Calgary, Calgary T2N 4N1, AB, Canada
| | - Qudeer Ahmed Abdul
- Department of Food and Life Science, Pukyong National University, Busan 48513, Republic of Korea
| | - Su Hui Seong
- Natural Products Research Division, Honam National Institute of Biological Resources, Mokpo 58762, Republic of Korea
| | - Byung-Sun Min
- Drug Research and Development Center, College of Pharmacy, Daegu Catholic University, Gyeongbuk 38430, Republic of Korea
| | - Hyun Ah Jung
- Department of Food Science and Human Nutrition, Jeonbuk National University, Jeonju 54896, Republic of Korea
| | - Jae Sue Choi
- Department of Food and Life Science, Pukyong National University, Busan 48513, Republic of Korea
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19
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Bostancıklıoğlu M. Exploring new frontiers: Effects of psychedelics on neurotransmitter-regulated glucagon release in pancreatic islets. Diabetes Obes Metab 2024; 26:1147-1149. [PMID: 38093674 DOI: 10.1111/dom.15411] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/01/2023] [Revised: 11/23/2023] [Accepted: 11/28/2023] [Indexed: 03/05/2024]
Affiliation(s)
- Mehmet Bostancıklıoğlu
- Institute of Experimental and Clinical Research, Pole of Endocrinology, Diabetes and Nutrition, Université Catholique de Louvain, Brussels, Belgium
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20
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Kim J, Kim M, Kim M, You YH, Song Y, Lee BW. Dysregulation of autophagy activation induced by atorvastatin contributes to new-onset diabetes mellitus in western diet-fed mice. Metabolism 2024; 153:155795. [PMID: 38253121 DOI: 10.1016/j.metabol.2024.155795] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Revised: 01/15/2024] [Accepted: 01/16/2024] [Indexed: 01/24/2024]
Abstract
BACKGROUND AND AIMS The incidence of statin-induced new-onset diabetes (NOD) is increasing but its underlying mechanisms remain unclear. We aimed to investigate the effects of various doses of atorvastatin (ATO)-induced autophagy on the development of NOD. METHODS AND RESULTS The isolated rat islets and MIN6 cells-treated with ATO, exhibited impaired glucose-stimulated insulin secretion, reduced insulin content, and induced apoptosis. Additionally, autophagy was induced at all doses (in vitro: 5, 10, 20 μM; in vivo: 10, 15, 20 mg/kg) in ATO-treated MIN6 cells or western diet (WD)-fed mice. In contrast to normal glucose-tolerant mice administered a low-dose (10 mg/kg) ATO, those treated with high-doses (15 or 20 mg/kg) exhibited impaired glucose tolerance. Furthermore, high-dose ATO-treated mice showed decreased β-cell mass and increased apoptosis compared to that of vehicle-treated mice. We also observed that the number of vesicophagous cells in the pancreas of 20 mg/kg ATO-treated WD-fed mice was higher than in vehicle-treated WD-fed mice. Inhibiting autophagy using 3-methyladenine (3-MA) and siAtg5 improved glucose tolerance in vivo and in vitro by preventing apoptotic β-cell death and restoring insulin granules. CONCLUSION These results indicate that high doses of ATO induced hyperactivated autophagy in pancreatic cells, leading to impaired insulin storage, decreased cell viability, and reduced functional cell mass, ultimately resulting in NOD development.
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Affiliation(s)
- Juhee Kim
- Medical Research Institute, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul 03181, Republic of Korea
| | - Minjune Kim
- Department of gastroenterology, Asan Medical Center, University of Ulsan College of Medicine, Seoul 05505, Republic of Korea
| | - Minjeong Kim
- Medical Research Institute, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul 03181, Republic of Korea
| | - Young-Hye You
- Division of Endocrinology and Metabolism, Department of Internal Medicine, College of Medicine, The Catholic University of Korea, Seoul 06591, Republic of Korea
| | - Youngmi Song
- Medical Research Institute, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul 03181, Republic of Korea.
| | - Byung-Wan Lee
- Department of Internal Medicine, Yonsei University College of Medicine, Seoul 03722, Republic of Korea.
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21
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Chen X, Rahman A, Akumwami S, Morishita A, Kitada K, Ikeda Y, Funamoto M, Nishiyama A. Effects of D-allose on ATP production and cell viability in neonatal rat cardiomyocytes. J Pharmacol Sci 2024; 154:274-278. [PMID: 38485345 DOI: 10.1016/j.jphs.2024.02.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2023] [Revised: 01/26/2024] [Accepted: 02/14/2024] [Indexed: 03/19/2024] Open
Abstract
2-Deoxy-d-glucose (2DG) induces anticancer effects through glycolytic inhibition but it may raise the risk of arrhythmia. The rare monosaccharide d-allose also has anticancer properties, but its cardiac effects are unknown. We examined the effects of d-allose on adenosine triphosphate (ATP) production in neonatal rat cardiomyocytes. We showed that 25 mM d-allose selectively reduced glycolytic ATP, but had minimal impact on mitochondrial ATP, while 1 mM 2DG strongly inhibited both. Furthermore, d-allose had less impact on cell viability and was less cytotoxic than 2DG; neither compound caused apoptosis. Thus, d-allose selectively diminished glycolytic ATP production with no apparent effects on cardiomyocytes.
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Affiliation(s)
- Xi Chen
- Department of Pharmacology, Kagawa University, Kagawa, Japan
| | - Asadur Rahman
- Department of Pharmacology, Kagawa University, Kagawa, Japan.
| | - Steeve Akumwami
- Department of Pharmacology, Kagawa University, Kagawa, Japan; Department of Anesthesiology, Kagawa University, Kagawa, Japan
| | - Asahiro Morishita
- Department of Gastroenterology and Neurology, Faculty of Medicine, Kagawa University, Kagawa, Japan
| | - Kento Kitada
- Department of Pharmacology, Kagawa University, Kagawa, Japan
| | - Yasumasa Ikeda
- Department of Pharmacology, Graduate School of Biomedical Science, Tokushima University, Tokushima, Japan
| | - Masafumi Funamoto
- Department of Pharmacology, Graduate School of Biomedical Science, Tokushima University, Tokushima, Japan
| | - Akira Nishiyama
- Department of Pharmacology, Kagawa University, Kagawa, Japan
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22
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Kumawat BL, Kumar P, Mahla AS, Kumar A, Kumar A, Singh R, Kumar A. A novel action of insulin sensitizing drug as a potential promotor of preovulatory follicles, ovulation rate and prolificacy in sheep. Vet Res Commun 2024; 48:849-863. [PMID: 37957451 DOI: 10.1007/s11259-023-10259-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2023] [Accepted: 11/08/2023] [Indexed: 11/15/2023]
Abstract
The effect of the insulin-sensitizing drug metformin on preovulatory follicle (POF) number, ovulation rate, fetal rate and prolificacy was studied in forty-six cyclic Malpura ewes. After estrus synchronization, the ewes were equally divided into two groups (n = 23). The treatment group (MET) received a daily oral dose of metformin at a rate of 500 mg/animal for approximately 12 weeks, spanning five estrous cycles, as against untreated control (CON). All the ewes were bred to proven rams at the end of treatment. Ovarian ultrasound scans were performed at each estrus and day 9 of each cycle to assess the number and diameter of POFs and corpora lutea (CL), respectively. A comprehensive assessment of circulating hormones including, estradiol, progesterone, androstenedione, and insulin as well as metabolic indicators such as glucose, and lipid profile parameters was performed. At the end of treatment on the day of estrus (E5D0), the treatment showed a stimulatory effect on follicular development with a 53.2% (P < 0.001) increase in the number of POFs. It also increased the ovulation rate by 67.4% (P < 0.01), with a higher proportion (χ2df1 = 10.7, P < 0.001) of ewes in the MET group having multiple ovulations compared to the CON group (82.6 vs. 30.4%). With 1.48 ± 0.12 prolificacy rate in MET ewes, the proportion of ewes giving birth to multiple lambs was 2.9-fold higher than in the CON group. Plasma estradiol, insulin, glucose, total cholesterol, and LDL-cholesterol concentrations were lower (P < 0.05) in the MET ewes than in the CON. The results of the present study indicate that metformin can increase the number of POF, ovulation rate, fetal rate and prolificacy in ewes, while reducing the plasma estradiol, insulin, glucose and cholesterol in MET ewes.
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Affiliation(s)
- Babu Lal Kumawat
- Animal Physiology and Biochemistry Division, ICAR-Central Sheep and Wool Research Institute, Avikanagar, Rajasthan, 304 501, India
- Department of Veterinary Gynaecology and Obstetrics, College of Veterinary and Animal Sciences, Bikaner (RAJUVAS), Rajasthan, 334 001, India
- Department of Animal Reproduction, Gynaecology and Obstetrics, College of Veterinary and Animal Sciences, Parbhani (MAFSU, Nagpur), Maharashtra, 431 402, India
| | - Pramod Kumar
- Department of Veterinary Gynaecology and Obstetrics, College of Veterinary and Animal Sciences, Bikaner (RAJUVAS), Rajasthan, 334 001, India
| | - Ajit Singh Mahla
- Animal Physiology and Biochemistry Division, ICAR-Central Sheep and Wool Research Institute, Avikanagar, Rajasthan, 304 501, India.
| | - Ashok Kumar
- ICAR-Central Sheep and Wool Research Institute, Arid Region Campus, Bikaner, Rajasthan, 334 006, India
| | - Amit Kumar
- Department of Veterinary Gynaecology and Obstetrics, College of Veterinary and Animal Sciences, Bikaner (RAJUVAS), Rajasthan, 334 001, India
| | - Raghvendar Singh
- Animal Physiology and Biochemistry Division, ICAR-Central Sheep and Wool Research Institute, Avikanagar, Rajasthan, 304 501, India
| | - Arun Kumar
- ICAR-Central Sheep and Wool Research Institute, Avikanagar, Rajasthan, 304 501, India
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Liu SY, Wang H, Yang B, Hou B, Sun LS, Pang H, Wang HH, Fan YP. CircTAOK1 regulates high glucose induced inflammation, oxidative stress, ECM accumulation, and apoptosis in diabetic nephropathy via targeting miR-142-3p/SOX6 axis. Environ Toxicol 2024; 39:2197-2207. [PMID: 38124441 DOI: 10.1002/tox.24076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2023] [Revised: 08/31/2023] [Accepted: 11/28/2023] [Indexed: 12/23/2023]
Abstract
BACKGROUND Diabetic nephropathy (DN) is a complication caused by diabetes. Circular RNAs (circRNAs) are a kind of RNA with a closed circular structure, which has high stability and is involved in many disease-related processes. The mechanism of circRNA TAO kinase 1 (circTAOK1) in the pathogenesis and development of DN is unclear. METHODS CircTAOK1, microRNA (miR)-142-3p, and sex-determining region Y-box transcription factor 6 (SOX6) mRNA levels were analyzed by real-time quantitative polymerase chain reaction (RT-qPCR). Cell counting kit-8 (CCK8) and 5-ethynyl-2'-deoxyuridine (EdU) assays were used to analyze cell proliferation. Cell cycle distribution was detected by flow cytometry. Western blot assay was performed to test B-cell lymphoma 2 (Bcl-2), Bcl-2 associated X (Bax), cleaved-caspase 3, and fibronectin (FN), collagen I (Col I), and collagen IV (Col IV) protein levels. ELISA assay was used to measure interleukin 1β (IL-1β), interleukin 6 (IL-6), and tumor necrosis factor (TNF-α) levels. The reactive oxygen species (ROS) and malondialdehyde (MDA) levels and the superoxide dismutase (SOD) activity were assessed by the corresponding kits. And the correlation between miR-142-3p and circTAOK1 or SOX6 was confirmed by dual luciferase reporter assay, RNA immunoprecipitation assay and RNA pull down assay. RESULTS CircTAOK1 and SOX6 expression levels were up-regulated, while miR-142-3p expression was down-regulated in DN serum and HG-treated HK-2 cells. Knockdown of circTAOK1 could inhibit cell injury of HG-induced HK-2 cells. The inhibitory effect of circTAOK1 knockdown on HG-induced HK-2 cell injury was restored by miR-142-3p downregulation. CircTAOK1 acted as a sponge for miR-142-3p, and SOX6 was targeted by miR-142-3p. The overexpression of SOX6 could recover the effect of miR-142-3p overexpression on HG-induced HK-2 cell injury. CircTAOK1 regulated the expression of SOX6 by targeting miR-142-3p. CONCLUSION CircTAOK1 knockdown inhibited HG-induced HK-2 cell damage in DN by the miR-142-3p/SOX6 axis.
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Affiliation(s)
- Shu-Yan Liu
- Department of Endocrinology, The First Affiliated Hospital of Henan Polytechnic University (Jiaozuo Second People's Hospital), Jiaozuo, China
| | - Hong Wang
- Department of Gynecology, The First Affiliated Hospital of Henan Polytechnic University (Jiaozuo Second People's Hospital), Jiaozuo, China
| | - Bo Yang
- Department of Neurology, The First Affiliated Hospital of Henan Polytechnic University (Jiaozuo Second People's Hospital), Jiaozuo, China
| | - Baohua Hou
- Department of Pharmacy, Medical College of Henan Polytechnic University, Jiaozuo, China
| | - Li-Sha Sun
- Department of Gynecology, The First Affiliated Hospital of Henan Polytechnic University (Jiaozuo Second People's Hospital), Jiaozuo, China
| | - Hui Pang
- Department of Oncology, The First Affiliated Hospital of Henan Polytechnic University (Jiaozuo Second People's Hospital), Jiaozuo, China
| | - Hui-Hui Wang
- Department of Endocrinology, The First Affiliated Hospital of Henan Polytechnic University (Jiaozuo Second People's Hospital), Jiaozuo, China
| | - Yan-Ping Fan
- Department of Endocrinology, The First Affiliated Hospital of Henan Polytechnic University (Jiaozuo Second People's Hospital), Jiaozuo, China
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Sang R, Yu X, Xia H, Qian X, Yong J, Xu Y, Sun Y, Yao Y, Zhou J, Zhuo S. NT5DC2 knockdown suppresses progression, glycolysis, and neuropathic pain in triple-negative breast cancer by blocking the EGFR pathway. Mol Carcinog 2024; 63:785-796. [PMID: 38289126 DOI: 10.1002/mc.23688] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2023] [Revised: 12/03/2023] [Accepted: 01/14/2024] [Indexed: 03/16/2024]
Abstract
Triple-negative breast cancer (TNBC) is an exceptionally aggressive breast cancer subtype associated with neuropathic pain. This study explores the effects of 5'-nucleotidase domain-containing protein 2 (NT5DC2) on the progression of TNBC and neuropathic pain. Microarray analysis was conducted to identify differentially expressed genes in TNBC and the pathways involved. Gain- and loss-of-function assays of NT5DC2 were performed in TNBC cells, followed by detection of the extracellular acidification rate, adenosine triphosphate (ATP) levels, lactic acid production, glucose uptake, proliferation, migration, and invasion in TNBC cells. Macrophages were co-cultured with TNBC cells to examine the release of polarization-related factors and cytokines. A xenograft tumor model was established for in vivo validation. In addition, a mouse model of neuropathic pain was established through subepineural injection of TNBC cells, followed by measurement of the sciatic functional index and behavioral analysis to assess neuropathic pain. NT5DC2 was upregulated in TNBC and was positively correlated with epidermal growth factor receptor (EGFR). NT5DC2 interacted with EGFR to promote downstream signal transduction in TNBC cells. NT5DC2 knockdown diminished proliferation, migration, invasion, the extracellular acidification rate, ATP levels, lactic acid production, and glucose uptake in TNBC cells. Co-culture with NT5DC2-knockdown TNBC cells alleviated the M2 polarization of macrophages. Furthermore, NT5DC2 knockdown reduced tumor growth and neuropathic pain in mice. Importantly, activation of the EGFR pathway counteracted the effects of NT5DC2 knockdown. NT5DC2 knockdown protected against TNBC progression and neuropathic pain by inactivating the EGFR pathway.
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Affiliation(s)
- Rui Sang
- Health Management Center, Affiliated Hospital of Yangzhou University, Yangzhou, China
| | - Xiaoping Yu
- Health Management Center, Affiliated Hospital of Yangzhou University, Yangzhou, China
- Department of Ultrasound, Medical Imaging Center, Affiliated Hospital of Yangzhou University, Yangzhou, China
| | - Han Xia
- Department of Ultrasound, Medical Imaging Center, Affiliated Hospital of Yangzhou University, Yangzhou, China
| | - Xingxing Qian
- Health Management Center, Affiliated Hospital of Yangzhou University, Yangzhou, China
| | - Jiacheng Yong
- Health Management Center, Affiliated Hospital of Yangzhou University, Yangzhou, China
| | - Yan Xu
- Health Management Center, Affiliated Hospital of Yangzhou University, Yangzhou, China
- Department of Ultrasound, Medical Imaging Center, Affiliated Hospital of Yangzhou University, Yangzhou, China
| | - Yan Sun
- Health Management Center, Affiliated Hospital of Yangzhou University, Yangzhou, China
| | - Yiran Yao
- Department of Ultrasound, Medical Imaging Center, Affiliated Hospital of Yangzhou University, Yangzhou, China
| | - Jing Zhou
- Health Management Center, Affiliated Hospital of Yangzhou University, Yangzhou, China
| | - Shuangshuang Zhuo
- Department of Ultrasound, Medical Imaging Center, Affiliated Hospital of Yangzhou University, Yangzhou, China
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Singh S, Ghosh P, Sharma S, Bhargava S, Kumar AR. Tetrahydropalmatine from medicinal plants activates human glucokinase to regulate glucose homeostasis. Biotechnol Appl Biochem 2024; 71:295-313. [PMID: 38037220 DOI: 10.1002/bab.2541] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Accepted: 11/20/2023] [Indexed: 12/02/2023]
Abstract
Many synthetic glucokinase activators (GKAs), modulating glucokinase (GK), an important therapeutic target in diabetes have failed to clear clinical trials. In this study, an in silico structural similarity search with differing scaffolds of reference GKAs have been used to identify derivatives from natural product databases. Ten molecules with good binding score and similar interactions to that in the co-crystallized GK as well good activation against recombinant human GK experimentally were identified. Tetrahydropalmatine, an alkaloid present in formulations and drugs from medicinal plants, has not been explored as an antidiabetic agent and no information regarding its mechanism of action or GK activation exists. Tetrahydropalmatine activates GK with EC50 value of 71.7 ± 17.9 μM while lowering the S0.5 (7.1 mM) and increasing Vmax (9.22 μM/min) as compared to control without activator (S0.5 = 10.37 mM; Vmax = 4.8 μM/min). Kinetic data (α and β values) suggests it to act as mixed, nonessential type activator. Using microscale thermophoresis, Kd values of 3.8 μM suggests a good affinity for GK. In HepG2 cell line, the compound potentiated the uptake of glucose and maintained glucose homeostasis by increasing the expression of GK, glycogen synthase, and insulin receptor genes and lowering the expression of glucokinase regulatory protein (GKRP) and glucagon. Tetrahydropalmatine at low concentrations could elicit a good response by reducing expression of GKRP, increasing expression of GK while also activating it. Thus, it could be used alone or in combination as therapeutic drug as it could effectively modulate GK and alter glucose homeostasis.
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Affiliation(s)
- Sweta Singh
- Department of Zoology, Savitribai Phule Pune University, Pune, India
- Institute of Bioinformatics and Biotechnology, Savitribai Phule Pune University, Pune, India
| | - Payel Ghosh
- Bioinformatics Centre, Savitribai Phule Pune University, Pune, India
| | - Shilpy Sharma
- Department of Biotechnology, Savitribai Phule Pune University, Pune, India
| | - Shobha Bhargava
- Department of Zoology, Savitribai Phule Pune University, Pune, India
| | - Ameeta Ravi Kumar
- Institute of Bioinformatics and Biotechnology, Savitribai Phule Pune University, Pune, India
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Li Y, Yin C, Jiang J, Yang H, Zhang F, Xing Y, Wang W, Lu C. Tumor necrosis factor α-induced protein 8-like-2 controls microglia phenotype via metabolic reprogramming in BV2 microglial cells and responses to neuropathic pain. Int J Biochem Cell Biol 2024; 169:106541. [PMID: 38309648 DOI: 10.1016/j.biocel.2024.106541] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2023] [Revised: 01/07/2024] [Accepted: 01/28/2024] [Indexed: 02/05/2024]
Abstract
Microglial are major players in neuroinflammation that have recently emerged as potential therapeutic targets for neuropathic pain. Glucose metabolic programming has been linked to differential activation state and function in microglia. Tumor necrosis factor α-induced protein 8-like-2 (TNFAIP8L2) is an important component in regulating the anti-inflammatory response. However, the role of TNFAIP8L2 in microglia differential state during neuropathic pain and its interplay with glucose metabolic reprogramming in microglia has not yet been determined. Thus, we aimed to investigate the role of TNFAIP8L2 in the status of microglia in vitro and in vivo. BV2 microglial cells were treated with lipopolysaccharides plus interferon-gamma (LPS/IFNγ) or interleukin-4 (IL-4) to induce the two different phenotypes of microglia in vitro. In vivo experiments were conducted by chronic constriction injury of the sciatic nerve (CCI). We investigated whether TNFAIP8L2 regulates glucose metabolic programming in BV2 microglial cells. The data in vitro showed that TNFAIP8L2 lowers glycolysis and increases mitochondrial oxidative phosphorylation (OXPHOS) in inflammatory microglia. Blockade of glycolytic pathway abolished TNFAIP8L2-mediated differential activation of microglia. TNFAIP8L2 suppresses inflammatory microglial activation and promotes restorative microglial activation in BV2 microglial cells and in spinal cord microglia after neuropathic pain. Furthermore, TNFAIP8L2 controls differential activation of microglia and glucose metabolic reprogramming through the MAPK/mTOR/HIF-1α signaling axis. This study reveals that TNFAIP8L2 plays a critical role in neuropathic pain, providing important insights into glucose metabolic reprogramming and microglial phenotypic transition, which indicates that TNFAIP8L2 may be used as a potential drug target for the prevention of neuropathic pain.
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Affiliation(s)
- Yeqi Li
- School of Anesthesiology, Xuzhou Medical University, Xuzhou, Jiangsu, China
| | - Cui Yin
- School of Anesthesiology, Xuzhou Medical University, Xuzhou, Jiangsu, China; Jiangsu Province Key Laboratory of Anesthesiology, Xuzhou Medical University, Xuzhou, Jiangsu, China
| | - Jinhong Jiang
- School of Anesthesiology, Xuzhou Medical University, Xuzhou, Jiangsu, China; Jiangsu Province Key Laboratory of Anesthesiology, Xuzhou Medical University, Xuzhou, Jiangsu, China
| | - Huan Yang
- School of Anesthesiology, Xuzhou Medical University, Xuzhou, Jiangsu, China
| | - Feifei Zhang
- School of Anesthesiology, Xuzhou Medical University, Xuzhou, Jiangsu, China; Jiangsu Province Key Laboratory of Anesthesiology, Xuzhou Medical University, Xuzhou, Jiangsu, China
| | - Yanhong Xing
- School of Anesthesiology, Xuzhou Medical University, Xuzhou, Jiangsu, China; Jiangsu Province Key Laboratory of Anesthesiology, Xuzhou Medical University, Xuzhou, Jiangsu, China
| | - Wuyang Wang
- School of Anesthesiology, Xuzhou Medical University, Xuzhou, Jiangsu, China; Jiangsu Province Key Laboratory of Anesthesiology, Xuzhou Medical University, Xuzhou, Jiangsu, China.
| | - Chen Lu
- School of Anesthesiology, Xuzhou Medical University, Xuzhou, Jiangsu, China; Jiangsu Province Key Laboratory of Anesthesiology, Xuzhou Medical University, Xuzhou, Jiangsu, China.
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Noguchi H, Ikenaga T, Ueno S, Kohashi C, Matsumura Y, Kakumoto Y, Kohda N, Hara H, Hira T. Effect of Single Oral Coingestion of GABA and Malic Acid on Postprandial GLP-1, Glucose, and Insulin Responses in Healthy Volunteers: A Randomized, Double-Blind, Placebo-Controlled, Crossover Study. Mol Nutr Food Res 2024; 68:e2300610. [PMID: 38487986 DOI: 10.1002/mnfr.202300610] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2023] [Revised: 12/19/2023] [Indexed: 04/17/2024]
Abstract
SCOPE This study examines whether coingestion of γ-aminobutyric acid (GABA) and malic acid (MA) before meals enhances glucagon-like peptide-1 (GLP-1) secretion, and which affects subsequent insulin and glycemic responses in humans. METHODS AND RESULTS Initially, a murine enteroendocrine STC-1 cell line is used to verify coadministration of GABA and MA synergistically induces GLP-1 secretion. Next, 22 healthy adults are given water (50 mL) containing 400 mg GABA and 400 mg MA (Test), or only 400 mg citric acid (CA) (Placebo) 20 min before meal tolerance test (MTT). Interval blood samples are taken postprandially over 180 min to determine GLP-1, insulin, and glucose responses. By comparison to preload of Placebo, preload of Test significantly increases plasma GLP-1 (total/active) levels (incremental area under the curve by 1.2- and 1.6-fold), respectively. However, there are no significant differences in postprandial blood glucose and insulin. CONCLUSION Coingestion of GABA and MA before meals enhances postprandial GLP-1 secretion. Future studies should explore optimal dosage regimens to find the efficacy of the mixture on insulin and glycemic response.
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Affiliation(s)
- Hiroki Noguchi
- Graduate School of Agriculture, Hokkaido University, Sapporo, 060-8589, Japan
- Otsu Nutraceuticals Research Institute, Otsuka Pharmaceutical Co., Ltd, Otsu, 520-0002, Japan
| | - Takeshi Ikenaga
- Otsu Nutraceuticals Research Institute, Otsuka Pharmaceutical Co., Ltd, Otsu, 520-0002, Japan
| | - Shota Ueno
- Otsu Nutraceuticals Research Institute, Otsuka Pharmaceutical Co., Ltd, Otsu, 520-0002, Japan
| | - Chieko Kohashi
- Otsu Nutraceuticals Research Institute, Otsuka Pharmaceutical Co., Ltd, Otsu, 520-0002, Japan
| | - Yasuhiro Matsumura
- Faculty of Health and Nutrition, Bunkyo University, Chigasaki, 253-8550, Japan
| | - Yusuke Kakumoto
- Department of Lead Discovery Research, Otsuka Pharmaceutical Co., Ltd, Tokushima, 771-0192, Japan
| | - Noriyuki Kohda
- Otsu Nutraceuticals Research Institute, Otsuka Pharmaceutical Co., Ltd, Otsu, 520-0002, Japan
| | - Hiroshi Hara
- Department of Food Science and Human Nutrition, Fuji Women's University, Ishikari, 061-3204, Japan
| | - Tohru Hira
- Graduate School of Agriculture, Hokkaido University, Sapporo, 060-8589, Japan
- Research Faculty of Agriculture, Hokkaido University, Sapporo, 060-8589, Japan
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28
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Huang W, O'Hara SE, Xie C, Liu N, Rayner CK, Nicholas LM, Wu T. Effects of a bitter substance, denatonium benzoate, on pancreatic hormone secretion. Am J Physiol Endocrinol Metab 2024; 326:E537-E544. [PMID: 38477876 DOI: 10.1152/ajpendo.00046.2024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/24/2024] [Revised: 03/06/2024] [Accepted: 03/06/2024] [Indexed: 03/14/2024]
Abstract
There is increasing evidence linking bitter taste receptor (BTR) signaling to gut hormone secretion and glucose homeostasis. However, its effect on islet hormone secretion has been poorly characterized. This study investigated the effect of the bitter substance, denatonium benzoate (DB), on hormone secretion from mouse pancreatic islets and INS-1 832/13 cells. DB (0.5-1 mM) augmented insulin secretion at both 2.8 mM and 16.7 mM glucose. This effect was no longer present at 5 mM DB likely due to the greater levels of cellular apoptosis. DB-stimulated insulin secretion involved closure of the KATP channel, activation of T2R signaling in beta-cells, and intraislet glucagon-like peptide-1 (GLP-1) release. DB also enhanced glucagon and somatostatin secretion, but the underlying mechanism was less clear. Together, this study demonstrates that the bitter substance, DB, is a strong potentiator of islet hormone secretion independent of glucose. This observation highlights the potential for widespread off-target effects associated with the clinical use of bitter-tasting substances.NEW & NOTEWORTHY We show that the bitter substance, denatonium benzoate (DB), stimulates insulin, glucagon, somatostatin, and GLP-1 secretion from pancreatic islets, independent of glucose, and that DB augments insulin release via the KATP channel, bitter taste receptor signaling, and intraislet GLP-1 secretion. Exposure to a high dose of DB (5 mM) induces cellular apoptosis in pancreatic islets. Therefore, clinical use of bitter substances to improve glucose homeostasis may have unintended negative impacts beyond the gut.
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Affiliation(s)
- Weikun Huang
- Centre for Research Excellence in Translating Nutritional Sciences to Good Health, Adelaide Medical School, The University of Adelaide, Adelaide, South Australia, Australia
- Institute for Photonics and Advanced Sensing, School of Physics, Chemistry and Earth Sciences, The University of Adelaide, Adelaide, South Australia, Australia
| | - Stephanie E O'Hara
- Robinson Research Institute, The University of Adelaide, Adelaide, South Australia, Australia
- Adelaide Centre for Epigenetics, School of Biomedicine, The University of Adelaide, Adelaide, South Australia, Australia
| | - Cong Xie
- Centre for Research Excellence in Translating Nutritional Sciences to Good Health, Adelaide Medical School, The University of Adelaide, Adelaide, South Australia, Australia
| | - Ning Liu
- Bioinformatics Division, The Walter and Eliza Hall Institute, Melbourne, Victoria, Australia
| | - Christopher K Rayner
- Centre for Research Excellence in Translating Nutritional Sciences to Good Health, Adelaide Medical School, The University of Adelaide, Adelaide, South Australia, Australia
| | - Lisa M Nicholas
- Robinson Research Institute, The University of Adelaide, Adelaide, South Australia, Australia
- Adelaide Centre for Epigenetics, School of Biomedicine, The University of Adelaide, Adelaide, South Australia, Australia
| | - Tongzhi Wu
- Centre for Research Excellence in Translating Nutritional Sciences to Good Health, Adelaide Medical School, The University of Adelaide, Adelaide, South Australia, Australia
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Xia J, Huang Y, Ma M, Liu F, Cao B. Downregulating lncRNA MIAT attenuates apoptosis of podocytes exposed to high glucose. Acta Diabetol 2024; 61:451-460. [PMID: 38072843 DOI: 10.1007/s00592-023-02213-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Accepted: 11/08/2023] [Indexed: 03/27/2024]
Abstract
AIMS Diabetic nephropathy (DN), a destructive complication of diabetes mellitus (DM), is one of the leading causes of end-stage renal disease (ESRD). This study aimed to investigate the role of long non-coding RNA (lncRNA) MIAT in high-glucose (HG)-induced podocyte injury associated with DN. METHODS Three human kidney podocyte (HKP) cultures were treated with HG to mimic DN. Expression of lncRNA MIAT, podocyte-specific and injury-related proteins, and apoptosis were assessed before and after MIAT knockdown using MIAT shRNAs. RESULTS MIAT expression was upregulated in HKPs in response to glucose stress. HG treatment resulted in a significant increase in the apoptotic rate, Bax level, and levels of injury-related proteins desmin, fibroblast-specific protein 1 (FSP-1), and smooth muscle α-actin (α-SMA), and a significant reduction in Bcl-2 levels and the levels of podocyte-specific proteins synaptopodin and podocin. Transfection of HKPs with shRNAs significantly reduced MIAT levels (p < 0.05) and attenuated apoptosis in HG-medium. Correspondingly, the levels of synaptopodin and podocin were upregulated, and desmin, FSP-1, and α-SMA were reduced (p < 0.05). Western blot analysis also showed that anti-apoptotic active caspase-3 and Bax and proapoptotic Bcl-2 were elevated and decreased, respectively, after MIAT knockdown, suggesting that apoptosis pathways are deactivated after MIAT downregulation. CONCLUSIONS High glucose upregulates MIAT level in HKPs and induces cellular injury. Knockdown of MIAT alleviates the injury likely via deactivating apoptosis pathways.
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Affiliation(s)
- Jiayi Xia
- Department of Endocrinology, The First Affiliated Hospital of Guizhou University of Traditional Chinese Medicine, Guiyang, 550001, Guizhou, China
| | - Yan Huang
- Department of Medical Insurance, The First Affiliated Hospital of Guizhou University of Traditional Chinese Medicine, Guiyang, 550001, Guizhou, China
| | - Min Ma
- Department of Gynecology, Graduate School of Guizhou, University of Traditional Chinese Medicine, Guiyang, 550001, Guizhou, China
| | - Fang Liu
- Department of Coloproctology, The First Affiliated Hospital of Guizhou University of Traditional Chinese Medicine, Guiyang, 550001, Guizhou, China.
| | - Bo Cao
- Department of Coloproctology, The First Affiliated Hospital of Guizhou University of Traditional Chinese Medicine, Guiyang, 550001, Guizhou, China.
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Monteiro MM, Gomes CC, Cruz MC, Horliana ACRT, Hamassaki DE, Lima CR, Santos MF. High glucose impairs human periodontal ligament cells migration through lowered microRNAs 221 and 222. J Periodontal Res 2024; 59:336-345. [PMID: 38041212 DOI: 10.1111/jre.13217] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2022] [Revised: 11/02/2023] [Accepted: 11/14/2023] [Indexed: 12/03/2023]
Abstract
OBJECTIVE To investigate the effects of miR-221 and miR-222 and high glucose on human periodontal ligament (PL) cells morphology, cytoskeleton, adhesion, and migration. BACKGROUND Chronic hyperglycemia is common in uncontrolled diabetes mellitus (DM) and plays a central role in long-term DM complications, such as impaired periodontal healing. We have previously shown that high glucose increases apoptosis of human PL cells by inhibiting miR-221 and miR-222 and consequently augmenting their target caspase-3. However, other effects of miR-221/222 downregulation on PL cells are still unknown. METHODS Cells from young humans' premolar teeth were cultured for 7 days under 5 or 30 mM glucose. Directional and spontaneous migration on fibronectin were studied using transwell and time-lapse assays, respectively. F-actin staining was employed to study cell morphology and the actin cytoskeleton. MiR-221 and miR-222 were inhibited using antagomiRs, and their expressions were evaluated by real-time RT-PCR. RESULTS High glucose inhibited PL cells early adhesion, spreading, and migration on fibronectin. Cells exposed to high glucose showed reduced polarization, velocity, and directionality. They formed several simultaneous unstable and short-lived protrusions, suggesting impairment of adhesion maturation. MiR-221 and miR-222 inhibition also reduced migration, decreasing cell directionality but not significantly cell velocity. After miR-221 and miR-222 downregulation cells showed morphological resemblance with cells exposed to high glucose. CONCLUSION High glucose impairs human PL cells migration potentially through a mechanism involving reduction of microRNA-221 and microRNA-222 expression. These effects may contribute to the impairment of periodontal healing, especially after surgery and during guided regeneration therapies.
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Affiliation(s)
- Mariana Marin Monteiro
- Department of Cell and Developmental Biology, Biomedical Sciences Institute, University of São Paulo, São Paulo, Brazil
| | - Cibele Crastequini Gomes
- Department of Cell and Developmental Biology, Biomedical Sciences Institute, University of São Paulo, São Paulo, Brazil
| | - Mario Costa Cruz
- Center of Facilities for Research Support (CEFAP-USP), Biomedical Sciences Institute, University of São Paulo, São Paulo, Brazil
| | | | - Dânia Emi Hamassaki
- Department of Cell and Developmental Biology, Biomedical Sciences Institute, University of São Paulo, São Paulo, Brazil
| | - Cilene Rebouças Lima
- Department of Cell and Developmental Biology, Biomedical Sciences Institute, University of São Paulo, São Paulo, Brazil
| | - Marinilce F Santos
- Department of Cell and Developmental Biology, Biomedical Sciences Institute, University of São Paulo, São Paulo, Brazil
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Zhang Y, Chen H, Zeng M, Guo P, Liu M, Cao B, Wang R, Hao F, Zheng X, Feng W. Futoquinol improves Aβ 25-35-induced memory impairment in mice by inhibiting the activation of p38MAPK through the glycolysis pathway and regulating the composition of the gut microbiota. Phytother Res 2024; 38:1799-1814. [PMID: 38330236 DOI: 10.1002/ptr.8136] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Revised: 12/18/2023] [Accepted: 01/13/2024] [Indexed: 02/10/2024]
Abstract
Futoquinol (Fut) is a compound extracted from Piper kadsura that has a nerve cell protection effect. However, it is unclear whether Fut has protective effects in Alzheimer's disease (AD). In this study, we aimed to explore the therapeutic effect of Fut in AD and its underlying mechanism. UPLC-MS/MS method was performed to quantify Fut in the hippocampus of mice brain. The cognition ability, neuronal and mitochondria damage, and levels of Aβ1-42, Aβ1-40, p-Tau, oxidative stress, apoptosis, immune cells, and inflammatory factors were measured in Aβ25-35-induced mice. The content of bacterial meta-geometry was predicted in the microbial composition based on 16S rDNA. The protein levels of HK II, p-p38MAPK, and p38MAPK were detected. PC-12 cells were cultured in vitro, and glucose was added to activate glycolysis to further explore the mechanism of action of Fut intervention in AD. Fut improved the memory and learning ability of Aβ25-35 mice, and reduced neuronal damage and the deposition of Aβ and Tau proteins. Moreover, Fut reduced mitochondrial damage, the levels of oxidative stress, apoptosis, and inflammatory factors. Fut significantly inhibited the expression of HK II and p-p38MAPK proteins. The in vitro experiment showed that p38MAPK was activated and Fut action inhibited after adding 10 mM glucose. Fut might inhibit the activation of p38MAPK through the glycolysis pathway, thereby reducing oxidative stress, apoptosis, and inflammatory factors and improving Aβ25-35-induced memory impairment in mice. These data provide pharmacological rationale for Fut in the treatment of AD.
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Affiliation(s)
- Yuhan Zhang
- College of pharmacy, Henan University of Chinese Medicine, Zhengzhou, China
- The Engineering and Technology Center for Chinese Medicine Development of Henan Province, Zhengzhou, China
| | - Hui Chen
- College of pharmacy, Henan University of Chinese Medicine, Zhengzhou, China
| | - Mengnan Zeng
- College of pharmacy, Henan University of Chinese Medicine, Zhengzhou, China
- The Engineering and Technology Center for Chinese Medicine Development of Henan Province, Zhengzhou, China
| | - Pengli Guo
- College of pharmacy, Henan University of Chinese Medicine, Zhengzhou, China
- The Engineering and Technology Center for Chinese Medicine Development of Henan Province, Zhengzhou, China
| | - Meng Liu
- College of pharmacy, Henan University of Chinese Medicine, Zhengzhou, China
- The Engineering and Technology Center for Chinese Medicine Development of Henan Province, Zhengzhou, China
| | - Bing Cao
- College of pharmacy, Henan University of Chinese Medicine, Zhengzhou, China
- The Engineering and Technology Center for Chinese Medicine Development of Henan Province, Zhengzhou, China
| | - Ru Wang
- College of pharmacy, Henan University of Chinese Medicine, Zhengzhou, China
- The Engineering and Technology Center for Chinese Medicine Development of Henan Province, Zhengzhou, China
| | - Fengxiao Hao
- College of pharmacy, Henan University of Chinese Medicine, Zhengzhou, China
- The Engineering and Technology Center for Chinese Medicine Development of Henan Province, Zhengzhou, China
| | - Xiaoke Zheng
- College of pharmacy, Henan University of Chinese Medicine, Zhengzhou, China
- The Engineering and Technology Center for Chinese Medicine Development of Henan Province, Zhengzhou, China
| | - Weisheng Feng
- College of pharmacy, Henan University of Chinese Medicine, Zhengzhou, China
- The Engineering and Technology Center for Chinese Medicine Development of Henan Province, Zhengzhou, China
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Strage EM, Ley C, Westermark GT, Tengholm A. Insulin release from isolated cat islets of Langerhans. Domest Anim Endocrinol 2024; 87:106836. [PMID: 38141375 DOI: 10.1016/j.domaniend.2023.106836] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/08/2023] [Revised: 12/18/2023] [Accepted: 12/18/2023] [Indexed: 12/25/2023]
Abstract
Feline diabetes mellitus is a common endocrine disease with increasing prevalence. It shows similarities with human type 2 diabetes and is characterized by insulin resistance and deficient insulin secretion. Moreover, cats and humans belong to the very few species that form amyloid depositions in the pancreatic islets. However, little is known about cat islet function and no studies have addressed insulin secretion from isolated islets ex vivo. The aim of this study was to establish a protocol for isolation of islets of Langerhans from pancreata of cats euthanized due to disease, and to evaluate insulin secretion responses to various physiological and pharmacological stimuli. Collagenase digestion of pancreatic tissue from 13 non-diabetic cats and two cats with diabetic ketoacidosis yielded individual islets surrounded by a layer of exocrine tissue that was reduced after two days in culture. Histological examination showed islet amyloid in pancreatic biopsies from most non-diabetic and in one diabetic cat. Islets from non-diabetic cats cultured at 5.5 mM glucose responded with increased insulin secretion to 16.7 mM glucose, 30 mM K+ and 20 µM of the sulfonylurea glipizide (2-3 times basal secretion at 3 mM glucose). The glucagon-like peptide-1 receptor agonist exendin-4 (100 nM) had no effect under basal conditions but potentiated glucose-triggered insulin release. Only one of nine islet batches from diabetic cats released detectable amounts of insulin, which was enhanced by exendin-4. Culture of islets from non-diabetic cats at 25 mM glucose impaired secretion both in response to glucose and K+ depolarization. In conclusion, we describe a procedure for isolation of islets from cat pancreas biopsies and demonstrate that isolated cat islets secrete insulin in response to glucose and antidiabetic drugs. The study provides a basis for future ex vivo studies of islet function relevant to the understanding of the pathophysiology and treatment of feline diabetes.
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Affiliation(s)
- Emma M Strage
- Department of Clinical Sciences, Swedish University of Agricultural Sciences, P.O. Box 7054, Uppsala SE-750 07, Sweden.
| | - Cecilia Ley
- Department of Biomedical Sciences and Veterinary Public Health, Swedish University of Agricultural Sciences, P.O. Box 7028, Uppsala SE-750 07, Sweden; Department of Pathology and Wildlife Diseases, National Veterinary Institute (SVA), Uppsala SE-751 89, Sweden
| | - Gunilla T Westermark
- Department of Medical Cell Biology, Uppsala University, Biomedical Centre, P.O. Box 571, Uppsala SE-751 23, Sweden
| | - Anders Tengholm
- Department of Medical Cell Biology, Uppsala University, Biomedical Centre, P.O. Box 571, Uppsala SE-751 23, Sweden
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Wu J, Li X, Nie H, Shen Y, Guo Z, Huihan Chu C, Cai K, Tang C. Phytic acid promotes high glucose-mediated bone marrow mesenchymal stem cells osteogenesis via modulating circEIF4B that sponges miR-186-5p and complexes with IGF2BP3. Biochem Pharmacol 2024; 222:116118. [PMID: 38467376 DOI: 10.1016/j.bcp.2024.116118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2023] [Revised: 12/26/2023] [Accepted: 03/07/2024] [Indexed: 03/13/2024]
Abstract
Diabetes-related hyperglycemia inhibits bone marrow mesenchymal stem cell (BMSC) function, thereby disrupting osteoblast capacity and bone regeneration. Dietary supplementation with phytic acid (PA), a natural inositol phosphate, has shown promise in preventing osteoporosis and diabetes-related complications. Emerging evidence has suggested that circular (circ)RNAs implicate in the regulation of bone diseases, but their specific regulatory roles in BMSC osteogenesis in hyperglycemic environments remain elucidated. In this study, in virto experiments demonstrated that PA treatment effectively improved the osteogenic capability of high glucose-mediated BMSCs. Differentially expressed circRNAs in PA-induced BMSCs were identified using circRNA microarray analysis. Here, our findings highlight an upregulation of circEIF4B expression in BMSCs stimulated with PA under a high-glucose microenvironment. Further investigations demonstrated that circEIF4B overexpression promoted high glucose-mediated BMSC osteogenesis. In contrast, circEIF4B knockdown exerted the opposite effect. Mechanistically, circEIF4B sequestered microRNA miR-186-5p and triggered osteogenesis enhancement in BMSCs by targeting FOXO1 directly. Furthermore, circEIF4B inhibited the ubiquitin-mediated degradation of IGF2BP3, thereby stabilizing ITGA5 mRNA and promoting BMSC osteogenic differentiation. In vivo experiments, circEIF4B inhibition attenuated the effectiveness of PA treatment in diabetic rats with cranial defects. Collectively, our study identifies PA as a novel positive regulator of BMSC osteogenic differentiation through the circEIF4B/miR-186-5p/FOXO1 and circEIF4B/IGF2BP3/ITGA5 axes, which offers a new strategy for treating high glucose-mediatedBMSCosteogenic dysfunction and delayed bone regeneration in diabetes.
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Affiliation(s)
- Jin Wu
- Department of Oral Implantology Affiliated Hospital of Stomatology, Nanjing Medical University, 136 Hanzhong Road, Nanjing, Jiangsu Province 210029, China; Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, 140 Hanzhong Road, Nanjing, Jiangsu Province 210029, China
| | - Xiang Li
- Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, 140 Hanzhong Road, Nanjing, Jiangsu Province 210029, China; Department of Oral and Maxillofacial Surgery Affiliated Hospital of Stomatology, Nanjing Medical University, 136 Hanzhong Road, Nanjing, Jiangsu Province 210029, China
| | - Hepeng Nie
- Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, 140 Hanzhong Road, Nanjing, Jiangsu Province 210029, China; Department of General Dentistry Affiliated Hospital of Stomatology, Nanjing Medical University, 136 Hanzhong Road, Nanjing, Jiangsu Province 210029, China
| | - Yue Shen
- Department of Oral Implantology Affiliated Hospital of Stomatology, Nanjing Medical University, 136 Hanzhong Road, Nanjing, Jiangsu Province 210029, China; Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, 140 Hanzhong Road, Nanjing, Jiangsu Province 210029, China
| | - Zixiang Guo
- Department of Oral Implantology Affiliated Hospital of Stomatology, Nanjing Medical University, 136 Hanzhong Road, Nanjing, Jiangsu Province 210029, China; Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, 140 Hanzhong Road, Nanjing, Jiangsu Province 210029, China
| | - Catherine Huihan Chu
- Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, 140 Hanzhong Road, Nanjing, Jiangsu Province 210029, China; Department of Orthodontics Affiliated Hospital of Stomatology, Nanjing Medical University, 136 Hanzhong Road, Nanjing, Jiangsu Province 210029, China
| | - Kunzhan Cai
- Department of Oral Implantology Affiliated Hospital of Stomatology, Nanjing Medical University, 136 Hanzhong Road, Nanjing, Jiangsu Province 210029, China; Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, 140 Hanzhong Road, Nanjing, Jiangsu Province 210029, China
| | - Chunbo Tang
- Department of Oral Implantology Affiliated Hospital of Stomatology, Nanjing Medical University, 136 Hanzhong Road, Nanjing, Jiangsu Province 210029, China; Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, 140 Hanzhong Road, Nanjing, Jiangsu Province 210029, China.
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Ma Q, Hu Y, Li H, Kuang Y, Li J, Song J. Developmental endothelial locus-1 promotes osteogenic differentiation and alveolar bone regeneration in experimental periodontitis with type 2 diabetes mellitus. J Periodontal Res 2024; 59:355-365. [PMID: 38102743 DOI: 10.1111/jre.13219] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Revised: 10/23/2023] [Accepted: 11/22/2023] [Indexed: 12/17/2023]
Abstract
OBJECTIVES This study sought to explore the role of developmental endothelial locus-1 (DEL-1) in osteogenic differentiation of human periodontal ligament stem cells (hPDLSCs) and investigate the therapeutic effect of DEL-1 in ligature-induced experimental periodontitis with type 2 diabetes mellitus (T2DM). BACKGROUND T2DM is a significant risk factor for periodontitis. Treatment modalities for periodontitis with T2DM are being explored. DEL-1 is a versatile protein that can modulate the different stages of inflammatory diseases including periodontitis. The direct effect of DEL-1 on osteogenic differentiation of PDLSCs in periodontitis with T2DM is poorly understood. METHODS Primary hPDLSCs were isolated from periodontal ligament tissue and identified by flow cytometry. In osteogenesis experiments, alkaline phosphatase (ALP), Alizarin Red staining and western blot were used to assess the osteogenic effect of DEL-1 on hPDLSCs in high glucose and inflammation environments. The mouse model of ligature-induced experimental periodontitis was established. H&E and Masson's trichrome staining were used to assess the change of periodontal tissue after local periodontal injection of DEL-1. Immunohistochemical staining was used to evaluate osteogenic-related protein expression. RESULTS hPDLSCs expressed mesenchymal stem cell (MSC)-specific surface markers and were negative for hematopoietic cell surface markers. hPDLSCs had the potential for multidirectional differentiation. DEL-1 could enhance the osteogenic differentiation of hPDLSCs in high glucose and inflammation environments, although it did not return to the control level. Histological staining showed that DEL-1 contributed to alveolar bone regeneration and osteogenic-related protein expression, but the degree of improvement in T2DM mice was lower than in non-T2DM mice. CONCLUSIONS In summary, we demonstrated that DEL-1 could promote osteogenic differentiation of hPDLSCs in high glucose and inflammation environment and rescue alveolar bone loss in experimental periodontitis with T2DM, which could provide a novel therapeutic target for periodontitis with T2DM.
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Affiliation(s)
- Qian Ma
- College of Stomatology, Chongqing Medical University, Chongqing, China
- Chongqing Key Laboratory of Oral Diseases and Biomedical Sciences, Chongqing Medical University, Chongqing, China
- Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education, Chongqing Medical University, Chongqing, China
| | - Yiyao Hu
- College of Stomatology, Chongqing Medical University, Chongqing, China
- Chongqing Key Laboratory of Oral Diseases and Biomedical Sciences, Chongqing Medical University, Chongqing, China
- Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education, Chongqing Medical University, Chongqing, China
| | - Han Li
- College of Stomatology, Chongqing Medical University, Chongqing, China
- Chongqing Key Laboratory of Oral Diseases and Biomedical Sciences, Chongqing Medical University, Chongqing, China
- Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education, Chongqing Medical University, Chongqing, China
| | - Yunchun Kuang
- College of Stomatology, Chongqing Medical University, Chongqing, China
- Chongqing Key Laboratory of Oral Diseases and Biomedical Sciences, Chongqing Medical University, Chongqing, China
- Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education, Chongqing Medical University, Chongqing, China
| | - Jie Li
- College of Stomatology, Chongqing Medical University, Chongqing, China
- Chongqing Key Laboratory of Oral Diseases and Biomedical Sciences, Chongqing Medical University, Chongqing, China
- Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education, Chongqing Medical University, Chongqing, China
| | - Jinlin Song
- College of Stomatology, Chongqing Medical University, Chongqing, China
- Chongqing Key Laboratory of Oral Diseases and Biomedical Sciences, Chongqing Medical University, Chongqing, China
- Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education, Chongqing Medical University, Chongqing, China
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Miederer I, Schmitt U, Bausbacher N, Röhrich J, Mildenberger P, Lutz B, Tüscher O, Schreckenberger M. Chronic Administration of Δ 9-Tetrahydrocannabinol Alters Brain Glucose Uptake and Improves Waiting Impulsivity in the Rat. Cannabis Cannabinoid Res 2024; 9:612-621. [PMID: 36800226 DOI: 10.1089/can.2022.0268] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/18/2023] Open
Abstract
Introduction: Δ9-Tetrahydrocannabinol (THC) acts as an agonist at cannabinoid receptors. Its chronic intake affects many behaviors, including cognitive processes. The aims of this study in rats are to assess the chronic effects of THC on impulsivity and on regional brain glucose uptake. Materials and Methods: For the determination of "waiting impulsivity," a total of 20 male Lister Hooded rats were trained to perform a reaction time task, followed by a baseline test of impulsivity and baseline glucose uptake measurements with [18F]-fluoro-2-deoxy-D-glucose and positron emission tomography (PET). Then, 10 rats each received 3 mg/kg THC or vehicle injected intraperitoneally daily for 21 days. Subsequently, a second behavioral test and PET measurements were performed, and blood THC concentrations were determined. Analyses of variance of brain regions of the impulsivity network with the parameter "standardized uptake value" regarding glucose uptake and correlation analyses of the collected parameters were carried out. Discussion: After chronic THC treatment, decreased glucose uptake (p-values <0.05) was found in cingulate cortex, hippocampus, amygdala, thalamus, and cerebellar cortex, as compared with vehicle-treated rats. The number of correct no-go responses (increased waiting time) significantly increased (p<0.05) in THC-treated rats. Furthermore, correct no-go responses correlated positively and strongly with the THC blood concentrations (Spearman's ρ=0.79, p<0.01). Conclusion: These findings reflect a specific reduction in impulsive behavior after chronic THC treatment, showing a functionally relevant influence of THC on "waiting impulsivity" with reduced selective glucose uptake at the same time.
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Affiliation(s)
- Isabelle Miederer
- Department of Nuclear Medicine, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
| | - Ulrich Schmitt
- Leibniz Institute for Resilience Research (LIR), Mainz, Germany
| | - Nicole Bausbacher
- Department of Nuclear Medicine, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
| | - Jörg Röhrich
- Institute of Legal Medicine, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
| | - Philipp Mildenberger
- Institute for Medical Biostatistics, Epidemiology and Informatics, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
| | - Beat Lutz
- Leibniz Institute for Resilience Research (LIR), Mainz, Germany
- Institute of Physiological Chemistry, and University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
| | - Oliver Tüscher
- Leibniz Institute for Resilience Research (LIR), Mainz, Germany
- Department of Psychiatry and Psychotherapy, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
| | - Mathias Schreckenberger
- Department of Nuclear Medicine, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
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Shepard BD, Chau J, Kurtz R, Rosenberg AZ, Sarder P, Border SP, Ginley B, Rodriguez O, Albanese C, Knoer G, Greene A, De Souza AMA, Ranjit S, Levi M, Ecelbarger CM. Nascent shifts in renal cellular metabolism, structure, and function due to chronic empagliflozin in prediabetic mice. Am J Physiol Cell Physiol 2024; 326:C1272-C1290. [PMID: 38602847 DOI: 10.1152/ajpcell.00446.2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2023] [Revised: 02/21/2024] [Accepted: 02/21/2024] [Indexed: 04/13/2024]
Abstract
Sodium-glucose cotransporter, type 2 inhibitors (SGLT2i) are emerging as the gold standard for treatment of type 2 diabetes (T2D) with renal protective benefits independent of glucose lowering. We took a high-level approach to evaluate the effects of the SGLT2i, empagliflozin (EMPA) on renal metabolism and function in a prediabetic model of metabolic syndrome. Male and female 12-wk-old TallyHo (TH) mice, and their closest genetic lean strain (Swiss-Webster, SW) were treated with a high-milk-fat diet (HMFD) plus/minus EMPA (@0.01%) for 12-wk. Kidney weights and glomerular filtration rate were slightly increased by EMPA in the TH mice. Glomerular feature analysis by unsupervised clustering revealed sexually dimorphic clustering, and one unique cluster relating to EMPA. Periodic acid Schiff (PAS) positive areas, reflecting basement membranes and mesangium were slightly reduced by EMPA. Phasor-fluorescent life-time imaging (FLIM) of free-to-protein bound NADH in cortex showed a marginally greater reliance on oxidative phosphorylation with EMPA. Overall, net urine sodium, glucose, and albumin were slightly increased by EMPA. In TH, EMPA reduced the sodium phosphate cotransporter, type 2 (NaPi-2), but increased sodium hydrogen exchanger, type 3 (NHE3). These changes were absent or blunted in SW. EMPA led to changes in urine exosomal microRNA profile including, in females, enhanced levels of miRs 27a-3p, 190a-5p, and 196b-5p. Network analysis revealed "cancer pathways" and "FOXO signaling" as the major regulated pathways. Overall, EMPA treatment to prediabetic mice with limited renal disease resulted in modifications in renal metabolism, structure, and transport, which may preclude and underlie protection against kidney disease with developing T2D.NEW & NOTEWORTHY Renal protection afforded by sodium glucose transporter, type 2 inhibitors (SGLT2i), e.g., empagliflozin (EMPA) involves complex intertwined mechanisms. Using a novel mouse model of obesity with insulin resistance, the TallyHo/Jng (TH) mouse on a high-milk-fat diet (HMFD), we found subtle changes in metabolism including altered regulation of sodium transporters that line the renal tubule. New potential epigenetic determinants of metabolic changes relating to FOXO and cancer signaling pathways were elucidated from an altered urine exosomal microRNA signature.
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Affiliation(s)
- Blythe D Shepard
- Department of Human Science, Georgetown University, Washington, District of Columbia, United States
| | - Jennifer Chau
- Department of Medicine,Georgetown University, Washington, District of Columbia, United States
| | - Ryan Kurtz
- Department of Human Science, Georgetown University, Washington, District of Columbia, United States
| | - Avi Z Rosenberg
- Department of Pathology, Johns Hopkins University, Baltimore, Maryland, United States
| | - Pinaki Sarder
- J Crayton Pruitt Department of Biomedical Engineering, University of Florida, Gainesville, Florida, United States
| | - Samuel P Border
- J Crayton Pruitt Department of Biomedical Engineering, University of Florida, Gainesville, Florida, United States
| | - Brandon Ginley
- Department of Pathology, Johns Hopkins University, Baltimore, Maryland, United States
- Department of Computational Cell Biology, Anatomy, and Pathology, State University of New York at Buffalo, Buffalo, New York, United States
| | - Olga Rodriguez
- Department of Oncology, Lombardi Comprehensive Cancer Center, Georgetown University, Washington, District of Columbia, United States
- Center for Translational Imaging, Georgetown University, Washington, District of Columbia, United States
| | - Chris Albanese
- Department of Oncology, Lombardi Comprehensive Cancer Center, Georgetown University, Washington, District of Columbia, United States
- Center for Translational Imaging, Georgetown University, Washington, District of Columbia, United States
- Department of Radiology, Georgetown University, Washington, District of Columbia, United States
| | - Grace Knoer
- Center for Translational Imaging, Georgetown University, Washington, District of Columbia, United States
| | - Aarenee Greene
- Department of Medicine,Georgetown University, Washington, District of Columbia, United States
| | - Aline M A De Souza
- Department of Medicine,Georgetown University, Washington, District of Columbia, United States
| | - Suman Ranjit
- Department of Biochemistry and Molecular & Cellular Biology, Georgetown University, Washington, District of Columbia, United States
- Microscopy & Imaging Shared Resources, Georgetown University, Washington, District of Columbia, United States
| | - Moshe Levi
- Department of Biochemistry and Molecular & Cellular Biology, Georgetown University, Washington, District of Columbia, United States
| | - Carolyn M Ecelbarger
- Department of Medicine,Georgetown University, Washington, District of Columbia, United States
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He Q, Xia B, Yang M, Lu K, Fan D, Li W, Liu Y, Pan Y, Yuan J. Alterations in gut microbiota and bile acids by proton-pump inhibitor use and possible mediating effects on elevated glucose levels and insulin resistance. FASEB J 2024; 38:e23541. [PMID: 38498341 DOI: 10.1096/fj.202302558r] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2023] [Revised: 02/11/2024] [Accepted: 02/23/2024] [Indexed: 03/20/2024]
Abstract
Several observational studies have suggested that proton-pump inhibitor (PPI) use might increase diabetes risk, but the mechanism remains unclear. This study aimed to investigate the effects of PPI use on gut microbiota and bile acids (BAs) profiles, and to explore whether these changes could mediate the association of PPIs use with fasting blood glucose (FBG) levels and insulin resistance (IR) in Chinese population. A cross-sectional study was conducted in Shenzhen, China, from April to August 2021, enrolled 200 eligible patients from the local hospital. Participants completed a questionnaire and provided blood and stool samples. Gut microbiome was measured by16S rRNA gene sequencing, and bile acids were quantified by UPLC-MS/MS. Insulin resistance (IR) was assessed using the Homeostasis Model Assessment 2 (HOMA2-IR). PPI use was positively associated with higher levels of FBG and HOMA2-IR after controlling for possible confounders. PPI users exhibited a decreased Firmicutes and an increase in Bacteroidetes phylum, alongside higher levels of glycoursodeoxycholic acid (GUDCA) and taurochenodeoxycholic acid (TCDCA). Higher abundances of Bacteroidetes and Fusobacterium as well as higher levels of TCDCA in PPI users were positively associated with elevated FBG or HOMA2-IR. Mediation analyses indicated that the elevated levels of FBG and HOMA2-IR with PPI use were partially mediated by the alterations in gut microbiota and specific BAs (i.e., Fusobacterium genera and TCDCA). Long-term PPI use may increase FBG and HOMA2-IR levels, and alterations in gut microbiota and BAs profiles may partially explain this association.
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Affiliation(s)
- Qiangsheng He
- Scientific Research Center, Big Data Center, The Seventh Affiliated Hospital, Sun Yat-sen University, Shenzhen, Guangdong, China
- Clinical Research Center, The Seventh Affiliated Hospital, Sun Yat-sen University, Shenzhen, Guangdong, China
- Shenzhen Key Laboratory of Chinese Medicine Active Substance Screening and Translational Research, Shenzhen, Guangdong, China
| | - Bin Xia
- Scientific Research Center, Big Data Center, The Seventh Affiliated Hospital, Sun Yat-sen University, Shenzhen, Guangdong, China
- Clinical Research Center, The Seventh Affiliated Hospital, Sun Yat-sen University, Shenzhen, Guangdong, China
- Shenzhen Key Laboratory of Chinese Medicine Active Substance Screening and Translational Research, Shenzhen, Guangdong, China
| | - Man Yang
- Guangdong Provincial Key Laboratory of Gastroenterology, Center for Digestive Disease, The Seventh Affiliated Hospital, Sun Yat-sen University, Shenzhen, Guangdong, China
| | - Kuiqing Lu
- Clinical Research Center, The Seventh Affiliated Hospital, Sun Yat-sen University, Shenzhen, Guangdong, China
| | - Die Fan
- Clinical Nutrition Department, The General Hospital of Western Theater Command, Chengdu, Sichuan, China
| | - Wenjing Li
- Scientific Research Center, Big Data Center, The Seventh Affiliated Hospital, Sun Yat-sen University, Shenzhen, Guangdong, China
| | - Yuchen Liu
- Scientific Research Center, Big Data Center, The Seventh Affiliated Hospital, Sun Yat-sen University, Shenzhen, Guangdong, China
| | - Yihang Pan
- Scientific Research Center, Big Data Center, The Seventh Affiliated Hospital, Sun Yat-sen University, Shenzhen, Guangdong, China
- Guangdong Provincial Key Laboratory of Gastroenterology, Center for Digestive Disease, The Seventh Affiliated Hospital, Sun Yat-sen University, Shenzhen, Guangdong, China
| | - Jinqiu Yuan
- Scientific Research Center, Big Data Center, The Seventh Affiliated Hospital, Sun Yat-sen University, Shenzhen, Guangdong, China
- Clinical Research Center, The Seventh Affiliated Hospital, Sun Yat-sen University, Shenzhen, Guangdong, China
- Guangdong Provincial Key Laboratory of Gastroenterology, Center for Digestive Disease, The Seventh Affiliated Hospital, Sun Yat-sen University, Shenzhen, Guangdong, China
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38
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Odoh CK, Madrigal-Perez LA, Kamal R. Glucosylglycerol and proline reverse the effects of glucose on Rhodosporidium toruloides lifespan. Arch Microbiol 2024; 206:195. [PMID: 38546876 DOI: 10.1007/s00203-024-03930-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2024] [Revised: 03/11/2024] [Accepted: 03/13/2024] [Indexed: 04/02/2024]
Abstract
Rhodosporidium toruloides is a novel cell factory used to synthesis carotenoids, biosurfactants, and biofuel feedstocks. However, research on R. toruloides has generally centred on the manufacture of biochemicals, while analyses of its longevity have received scant attention. Understanding of R. toruloides longevity under different nutrient conditions could help to improve its biotechnological significance and metabolite production. Glucosylglycerol (GG) and proline are osmoprotectants that could revert the harmful effects of environmental stress. This study examined how GG and proline affect R. toruloides strain longevity under glucose nutrimental stress. Herein, we provide evidence that GG and proline enhance cell performance and viability. These compatible solutes neutralises the pro-ageing effects of high glucose (10% glucose) on the yeast cell and reverse its cellular stress. GG exhibits the greatest impact on lifespan extension at 100 mM, whereas proline exerts effect at 2 mM. Our data reveal that these compounds significantly affect the culture medium osmolarity. Moreso, GG and proline decreased ROS production and mitohormetic lifespan regulation, respectively. The data indicates that these solutes (proline and GG) support the longevity of R. toruloides at a pro-ageing high glucose culture condition.
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Affiliation(s)
- Chuks Kenneth Odoh
- Laboratory of Biotechnology, Dalian Institute of Chemical Physics, CAS, 457 Zhongshan Rd, Dalian, 116023, China.
- University of Chinese Academy of Sciences, Beijing, 100049, China.
| | | | - Rasool Kamal
- Laboratory of Biotechnology, Dalian Institute of Chemical Physics, CAS, 457 Zhongshan Rd, Dalian, 116023, China
- Dalian Key Laboratory of Energy Biotechnology, Dalian Institute of Chemical Physics, CAS, 457 Zhongshan Rd, Dalian, 116023, China
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Kong L, Zhao Q, Jiang X, Hu J, Jiang Q, Sheng L, Peng X, Wang S, Chen Y, Wan Y, Hou S, Liu X, Ma C, Li Y, Quan L, Chen L, Cui B, Li P. Trimethylamine N-oxide impairs β-cell function and glucose tolerance. Nat Commun 2024; 15:2526. [PMID: 38514666 PMCID: PMC10957989 DOI: 10.1038/s41467-024-46829-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2023] [Accepted: 03/12/2024] [Indexed: 03/23/2024] Open
Abstract
β-Cell dysfunction and β-cell loss are hallmarks of type 2 diabetes (T2D). Here, we found that trimethylamine N-oxide (TMAO) at a similar concentration to that found in diabetes could directly decrease glucose-stimulated insulin secretion (GSIS) in MIN6 cells and primary islets from mice or humans. Elevation of TMAO levels impairs GSIS, β-cell proportion, and glucose tolerance in male C57BL/6 J mice. TMAO inhibits calcium transients through NLRP3 inflammasome-related cytokines and induced Serca2 loss, and a Serca2 agonist reversed the effect of TMAO on β-cell function in vitro and in vivo. Additionally, long-term TMAO exposure promotes β-cell ER stress, dedifferentiation, and apoptosis and inhibits β-cell transcriptional identity. Inhibition of TMAO production improves β-cell GSIS, β-cell proportion, and glucose tolerance in both male db/db and choline diet-fed mice. These observations identify a role for TMAO in β-cell dysfunction and maintenance, and inhibition of TMAO could be an approach for the treatment of T2D.
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Affiliation(s)
- Lijuan Kong
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
- Diabetes Research Center of Chinese Academy of Medical Sciences, Beijing, China
- CAMS Key Laboratory of Molecular Mechanism and Target Discovery of Metabolic Disorder and Tumorigenesis, Beijing, China
| | - Qijin Zhao
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
- Diabetes Research Center of Chinese Academy of Medical Sciences, Beijing, China
- CAMS Key Laboratory of Molecular Mechanism and Target Discovery of Metabolic Disorder and Tumorigenesis, Beijing, China
| | - Xiaojing Jiang
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
- Diabetes Research Center of Chinese Academy of Medical Sciences, Beijing, China
- CAMS Key Laboratory of Molecular Mechanism and Target Discovery of Metabolic Disorder and Tumorigenesis, Beijing, China
| | - Jinping Hu
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Qian Jiang
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
- Diabetes Research Center of Chinese Academy of Medical Sciences, Beijing, China
- CAMS Key Laboratory of Molecular Mechanism and Target Discovery of Metabolic Disorder and Tumorigenesis, Beijing, China
| | - Li Sheng
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Xiaohong Peng
- College of Future Technology, Institute of Molecular Medicine, National Biomedical Imaging Center, Peking University, 100871, Beijing, China
- Beijing Key Laboratory of Cardiometabolic Molecular Medicine, Peking University, 100871, Beijing, China
| | - Shusen Wang
- Tianjin First Central Hospital, Tianjin, China
| | - Yibing Chen
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
- Diabetes Research Center of Chinese Academy of Medical Sciences, Beijing, China
- CAMS Key Laboratory of Molecular Mechanism and Target Discovery of Metabolic Disorder and Tumorigenesis, Beijing, China
| | - Yanjun Wan
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
- Diabetes Research Center of Chinese Academy of Medical Sciences, Beijing, China
- CAMS Key Laboratory of Molecular Mechanism and Target Discovery of Metabolic Disorder and Tumorigenesis, Beijing, China
| | - Shaocong Hou
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
- Diabetes Research Center of Chinese Academy of Medical Sciences, Beijing, China
- CAMS Key Laboratory of Molecular Mechanism and Target Discovery of Metabolic Disorder and Tumorigenesis, Beijing, China
| | - Xingfeng Liu
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
- Diabetes Research Center of Chinese Academy of Medical Sciences, Beijing, China
- CAMS Key Laboratory of Molecular Mechanism and Target Discovery of Metabolic Disorder and Tumorigenesis, Beijing, China
| | - Chunxiao Ma
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
- Diabetes Research Center of Chinese Academy of Medical Sciences, Beijing, China
- CAMS Key Laboratory of Molecular Mechanism and Target Discovery of Metabolic Disorder and Tumorigenesis, Beijing, China
| | - Yan Li
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Li Quan
- Beijing Key Laboratory of Cardiometabolic Molecular Medicine, Peking University, 100871, Beijing, China
| | - Liangyi Chen
- College of Future Technology, Institute of Molecular Medicine, National Biomedical Imaging Center, Peking University, 100871, Beijing, China
- Beijing Key Laboratory of Cardiometabolic Molecular Medicine, Peking University, 100871, Beijing, China
| | - Bing Cui
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
- CAMS Key Laboratory of Molecular Mechanism and Target Discovery of Metabolic Disorder and Tumorigenesis, Beijing, China
| | - Pingping Li
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China.
- Diabetes Research Center of Chinese Academy of Medical Sciences, Beijing, China.
- CAMS Key Laboratory of Molecular Mechanism and Target Discovery of Metabolic Disorder and Tumorigenesis, Beijing, China.
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Xi X, Yang Y, Chen Q, Ma J, Wang X, Deng Y, Wang X, Li Y. GnT-V-mediated aberrant N-glycosylation of TIMP-1 promotes diabetic retinopathy progression. Mol Biol Rep 2024; 51:428. [PMID: 38499842 PMCID: PMC10948582 DOI: 10.1007/s11033-024-09388-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2023] [Accepted: 02/26/2024] [Indexed: 03/20/2024]
Abstract
BACKGROUND Vascular endothelial growth factor (VEGF) signaling pathway plays an important role in the progression of diabetic retinopathy (DR). The glycosylation modification process of many key functional proteins in DR patients is abnormal. However, the potential involvement of abnormal N-glycoproteins in DR progression remains unclear. METHODS Glycoproteomic profiling of the vitreous humor was performed. The level of protein and N-glycoprotein was confirmed by Western blot and Lectin blot, respectively. The cell viability and migration efficiency were detected by CCK-8 and Transwell assay. Flow cytometry was conducted to analyze the level of cell apoptosis and reactive oxygen specie. Malondialdehyde, superoxide dismutase activity and VEGF content were detected by Enzyme linked immunosorbent assays. The interaction of metalloproteinase 1 (TIMP-1) with N-acetylglucosamine transferase V (GnT-V) was detected by GST pull-down. Hematoxylin and eosin staining and choroidal and retinal flat mount stained with fluorescein isothiocyanate-Dextran assay were used for functional research in vivo. RESULTS We found that N-glycosylation was up-regulated in DR rats and high glucose (HG)-induced human retinal pigment epithelium cell line ARPE-19. HG-induced inhibited the viability of ARPE-19 cells and promoted cell apoptosis and oxidative stress (OS), but these effects were reversed with kifunensine treatment, GnT-V knockdown and TIMP-1 mutation. Additionally, GnT-V binds to TIMP-1 to promote N-glycosylation of TIMP-1. Over-expression of GnT-V inhibited the viability of ARPE-19 cells and promoted cell apoptosis, OS and VEGF release, which these effects were reversed with TIMP-1 mutation. Interestingly, over-expression of GnT-V promoted retinal microvascular endothelial cells (RMECs) angiogenesis but was revered with TIMP-1 mutation, which was terminally boosted by VEGF-A treatment. Finally, knockdown of GnT-V relieved DR progression. CONCLUSION The findings indicate that GnT-V can promote RMECs angiogenesis and ARPE-19 cells injury through activation VEGF signaling pathway by increasing TIMP-1 N-glycosylation level, which provides a new theoretical basis for the prevention of DR.
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Affiliation(s)
- Xiaoting Xi
- Ophthalmology Department, The First Affiliated Hospital of Kunming Medical University, No. 295, Xichang Road, Kunming, 650032, Yunnan, China
| | - Yanni Yang
- Ophthalmology Department, The Second Hospital of Ningbo, Ningbo, 315010, Zhejiang, China
| | - Qianbo Chen
- Ophthalmology Department, The First Affiliated Hospital of Kunming Medical University, No. 295, Xichang Road, Kunming, 650032, Yunnan, China
| | - Jia Ma
- Ophthalmology Department, The First Affiliated Hospital of Kunming Medical University, No. 295, Xichang Road, Kunming, 650032, Yunnan, China
| | - Xuewei Wang
- Ophthalmology Department, The First Affiliated Hospital of Kunming Medical University, No. 295, Xichang Road, Kunming, 650032, Yunnan, China
| | - Yachun Deng
- Ophthalmology Department, The First Affiliated Hospital of Kunming Medical University, No. 295, Xichang Road, Kunming, 650032, Yunnan, China
| | - Xi Wang
- Ophthalmology Department, The First Affiliated Hospital of Kunming Medical University, No. 295, Xichang Road, Kunming, 650032, Yunnan, China
| | - Yan Li
- Ophthalmology Department, The First Affiliated Hospital of Kunming Medical University, No. 295, Xichang Road, Kunming, 650032, Yunnan, China.
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Chen Z, Stoukides DM, Tzanakakis ES. Light-Mediated Enhancement of Glucose-Stimulated Insulin Release of Optogenetically Engineered Human Pancreatic Beta-Cells. ACS Synth Biol 2024; 13:825-836. [PMID: 38377949 PMCID: PMC10949932 DOI: 10.1021/acssynbio.3c00653] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2023] [Revised: 01/27/2024] [Accepted: 02/05/2024] [Indexed: 02/22/2024]
Abstract
Enhancement of glucose-stimulated insulin secretion (GSIS) in exogenously delivered pancreatic β-cells is desirable, for example, to overcome the insulin resistance manifested in type 2 diabetes or to reduce the number of β-cells for supporting homeostasis of blood sugar in type 1 diabetes. Optogenetically engineered cells can potentiate their function with exposure to light. Given that cyclic adenosine monophosphate (cAMP) mediates GSIS, we surmised that optoamplification of GSIS is feasible in human β-cells carrying a photoactivatable adenylyl cyclase (PAC). To this end, human EndoC-βH3 cells were engineered to express a blue-light-activated PAC, and a workflow was established combining the scalable manufacturing of pseudoislets (PIs) with efficient adenoviral transduction, resulting in over 80% of cells carrying PAC. Changes in intracellular cAMP and GSIS were determined with the photoactivation of PAC in vitro as well as after encapsulation and implantation in mice with streptozotocin-induced diabetes. cAMP rapidly rose in β-cells expressing PAC with illumination and quickly declined upon its termination. Light-induced amplification in cAMP was concomitant with a greater than 2-fold GSIS vs β-cells without PAC in elevated glucose. The enhanced GSIS retained its biphasic pattern, and the rate of oxygen consumption remained unchanged. Diabetic mice receiving the engineered β-cell PIs exhibited improved glucose tolerance upon illumination compared to those kept in the dark or not receiving cells. The findings support the use of optogenetics for molecular customization of the β-cells toward better treatments for diabetes without the adverse effects of pharmacological approaches.
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Affiliation(s)
- Zijing Chen
- Department
of Chemical and Biological Engineering, Tufts University, Medford, Massachusetts 02155, United States
| | - Demetrios M. Stoukides
- Department
of Chemical and Biological Engineering, Tufts University, Medford, Massachusetts 02155, United States
| | - Emmanuel S. Tzanakakis
- Department
of Chemical and Biological Engineering, Tufts University, Medford, Massachusetts 02155, United States
- Department
of Developmental, Molecular and Cell Biology, Tufts University School of Medicine, Boston, Massachusetts 02111, United States
- Graduate
Program in Pharmacology and Experimental Therapeutics and Pharmacology
and Drug Development, Tufts University School
of Medicine, Boston, Massachusetts 02111, United States
- Clinical
and Translational Science Institute, Tufts
Medical Center, Boston, Massachusetts 02111, United States
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Molano RD, Pileggi A, Tse HM, Stabler CL, Fraker CA. A static glucose-stimulated insulin secretion (sGSIS) assay that is significantly predictive of time to diabetes reversal in the human islet bioassay. BMJ Open Diabetes Res Care 2024; 12:e003897. [PMID: 38485229 PMCID: PMC10941118 DOI: 10.1136/bmjdrc-2023-003897] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/09/2023] [Accepted: 02/08/2024] [Indexed: 03/17/2024] Open
Abstract
INTRODUCTION Static incubation (static glucose-stimulated insulin secretion, sGSIS) is a measure of islet secretory function. The Stimulation Index (SI; insulin produced in high glucose/insulin produced in low glucose) is currently used as a product release criterion of islet transplant potency. RESEARCH DESIGN AND METHODS Our hypothesis was that the Delta, insulin secreted in high glucose minus insulin secreted in low glucose, would be more predictive. To evaluate this hypothesis, sGSIS was performed on 32 consecutive human islet preparations, immobilizing the islets in a slurry of Sepharose beads to minimize mechanical perturbation. Simultaneous full-mass subrenal capsular transplants were performed in chemically induced diabetic immunodeficient mice. Logistic regression analysis was used to determine optimal cut-points for diabetes reversal time and the Fisher Exact Test was used to assess the ability of the Delta and the SI to accurately classify transplant outcomes. Receiver operating characteristic curve analysis was performed on cut-point grouped data, assessing the predictive power and optimal cut-point for each sGSIS potency metric. Finally, standard Kaplan-Meier-type survival analysis was conducted. RESULTS In the case of the sGSIS the Delta provided a superior islet potency metric relative to the SI.ConclusionsThe sGSIS Delta value is predicitive of time to diabetes reversal in the full mass human islet transplant bioassay.
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Affiliation(s)
- Ruth Damaris Molano
- Cell Transplant Center, Diabetes Research Institute, University of Miami, Coral Gables, Florida, USA
| | - Antonello Pileggi
- Cell Transplant Center, Diabetes Research Institute, University of Miami, Coral Gables, Florida, USA
| | - Hubert M Tse
- Microbiology, Molecular Genetics, and Immunology, University of Kansas Medical Center, Kansas City, Kansas, USA
| | - Cherie L Stabler
- Department of Biomedical Engineering, University of Miami, Coral Gables, Florida, USA
- J Crayton Pruitt Family Department of Biomedical Engineering, University of Florida Herbert Wertheim College of Engineering, Gainesville, Florida, USA
| | - Christopher A Fraker
- Diabetes Research Institute, University of Miami Miller School of Medicine, Miami, Florida, USA
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Zilstorff DB, Richter MM, Hannibal J, Jørgensen HL, Sennels HP, Wewer Albrechtsen NJ. Secretion of glucagon, GLP-1 and GIP may be affected by circadian rhythm in healthy males. BMC Endocr Disord 2024; 24:38. [PMID: 38481208 PMCID: PMC10938734 DOI: 10.1186/s12902-024-01566-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/04/2023] [Accepted: 03/04/2024] [Indexed: 03/17/2024] Open
Abstract
BACKGROUND Glucagon is secreted from pancreatic alpha cells in response to low blood glucose and increases hepatic glucose production. Furthermore, glucagon enhances hepatic protein and lipid metabolism during a mixed meal. Glucagon-like peptide-1 (GLP-1) and glucose-dependent insulinotropic polypeptide (GIP) are secreted from gut endocrine cells during meals and control glucose homeostasis by potentiating insulin secretion and inhibiting food intake. Both glucose homeostasis and food intake have been reported to be affected by circadian rhythms and vice versa. In this study, we investigated whether the secretion of glucagon, GLP-1 and GIP was affected by circadian rhythms. METHODS A total of 24 healthy men with regular sleep schedules were examined for 24 h at the hospital ward with 15 h of wakefulness and 9 h of sleep. Food intake was standardized, and blood samples were obtained every third hour. Plasma concentrations of glucagon, GLP-1 and GIP were measured, and data were analyzed by rhythmometric statistical methods. Available data on plasma glucose and plasma C-peptide were also included. RESULTS Plasma concentrations of glucagon, GLP-1, GIP, C-peptide and glucose fluctuated with a diurnal 24-h rhythm, with the highest levels during the day and the lowest levels during the night: glucagon (p < 0.0001, peak time 18:26 h), GLP-1 (p < 0.0001, peak time 17:28 h), GIP (p < 0.0001, peak time 18:01 h), C-peptide (p < 0.0001, peak time 17.59 h), and glucose (p < 0.0001, peak time 23:26 h). As expected, we found significant correlations between plasma concentrations of C-peptide and GLP-1 and GIP but did not find correlations between glucose concentrations and concentrations of glucagon, GLP-1 and GIP. CONCLUSIONS Our results demonstrate that under meal conditions that are similar to that of many free-living individuals, plasma concentrations of glucagon, GLP-1 and GIP were observed to be higher during daytime and evening than overnight. These findings underpin disturbed circadian rhythm as a potential risk factor for diabetes and obesity. TRIAL REGISTRATION ClinicalTrials.gov Identifier: NCT06166368. Registered 12 December 2023.
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Affiliation(s)
- Dorte B Zilstorff
- Department of Clinical Biochemistry, Copenhagen University Hospital - Bispebjerg Hospital, Copenhagen, Denmark
| | - Michael M Richter
- Department of Clinical Biochemistry, Copenhagen University Hospital - Bispebjerg Hospital, Copenhagen, Denmark
- NNF Center for Protein Research, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Jens Hannibal
- Department of Clinical Biochemistry, Copenhagen University Hospital - Bispebjerg Hospital, Copenhagen, Denmark
- Department of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Henrik L Jørgensen
- Department of Clinical Biochemistry, Copenhagen University Hospital - Hvidovre, Hvidovre, Denmark
| | - Henriette P Sennels
- Department of Clinical Biochemistry, Copenhagen University Hospital - Bispebjerg Hospital, Copenhagen, Denmark
| | - Nicolai J Wewer Albrechtsen
- Department of Clinical Biochemistry, Copenhagen University Hospital - Bispebjerg Hospital, Copenhagen, Denmark.
- NNF Center for Protein Research, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark.
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Corporeau C, Le Foll C, Cruciani-Guglielmacci C, Le Stunff H, Mithieux G, Magnan C, Delarue J. Fish oil minimises feed intake and improves insulin sensitivity in Zucker fa/fa rats. Br J Nutr 2024; 131:749-761. [PMID: 37877265 DOI: 10.1017/s0007114523002404] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2023]
Abstract
Long-chain n-3 PUFA (LC n-3 PUFA) prevent, in rodents, insulin resistance (IR) induced by a high-fat and/or fructose diet but not IR induced by glucocorticoids. In humans, contrasting effects have also been reported. We investigated their effects on insulin sensitivity, feed intake (FI) and body weight gain in genetically insulin resistant male obese (fa/fa) Zucker (ZO) rats during the development of obesity. ZO rats were fed a diet supplemented with 7 % fish oil (FO) + 1 % corn oil (CO) (wt/wt) (ZOFO), while the control group was fed a diet containing 8 % fat from CO (wt/wt) (ZOCO). Male lean Zucker (ZL) rats fed either FO (ZLFO) or CO (ZLCO) diet were used as controls. FO was a marine-derived TAG oil containing EPA 90 mg/g + DHA 430 mg/g. During an oral glucose tolerance test, glucose tolerance remained unaltered by FO while insulin response was reduced in ZOFO only. Liver insulin sensitivity (euglycaemic-hyperinsulinaemic clamp + 2 deoxyglucose) was improved in ZOFO rats, linked to changes in phosphoenolpyruvate carboxykinase expression, activity and glucose-6-phosphatase activity. FI in response to intra-carotid insulin/glucose infusion was decreased similarly in ZOFO and ZOCO. Hypothalamic ceramides levels were lower in ZOFO than in ZOCO. Our study demonstrates that LC n-3 PUFA can minimise weight gain, possibly by alleviating hypothalamic lipotoxicity, and liver IR in genetically obese Zucker rats.
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Affiliation(s)
- Charlotte Corporeau
- Department of Nutritional Sciences, Hospital University, Faculty of Medicine, University of Brest, Plouzané, France
- Present address: Ifremer, University of Brest, CNRS, IRD, LEMAR, F-29280 Plouzané, France
| | - Christelle Le Foll
- Department of Nutritional Sciences, Hospital University, Faculty of Medicine, University of Brest, Plouzané, France
- Present address: Institute of Veterinary Physiology, University of Zurich, CH-8057, Zurich, Switzerland
| | | | - Hervé Le Stunff
- Université Paris Cité, CNRS, Unité de Biologie Fonctionnelle et Adaptative, F-75013 Paris, France
- Present address: Institut des Neurosciences Paris-Saclay-Université Paris-Saclay-CNRS UMR 9197, Gif-sur-Yvette, France
| | - Gilles Mithieux
- Inserm, U855, Lyon, F-69008, France
- University Lyon 1, Villeurbanne, F-69622, France
- University of Lyon, Lyon, F-69008, France
| | - Christophe Magnan
- Université Paris Cité, CNRS, Unité de Biologie Fonctionnelle et Adaptative, F-75013 Paris, France
| | - Jacques Delarue
- Department of Nutritional Sciences, ER7479 SPURBO, Hospital University, Faculty of Medicine University of Brest, Plouzane, France
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Lin X, Huang S, Gao S, Liu J, Tang J, Yu M. Integrin β5 subunit regulates hyperglycemia-induced vascular endothelial cell apoptosis through FoxO1-mediated macroautophagy. Chin Med J (Engl) 2024; 137:565-576. [PMID: 37500497 DOI: 10.1097/cm9.0000000000002769] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2023] [Indexed: 07/29/2023] Open
Abstract
BACKGROUND Hyperglycemia frequently induces apoptosis in endothelial cells and ultimately contributes to microvascular dysfunction in patients with diabetes mellitus (DM). Previous research reported that the expression of integrins as well as their ligands was elevated in the diseased vessels of DM patients. However, the association between integrins and hyperglycemia-induced cell death is still unclear. This research was designed to investigate the role played by integrin subunit β5 (ITGB5) in hyperglycemia-induced endothelial cell apoptosis. METHODS We used leptin receptor knockout (Lepr-KO) ( db / db ) mice as spontaneous diabetes animal model. Selective deletion of ITGB5 in endothelial cell was achieved by injecting vascular targeted adeno-associated virus via tail vein. Besides, we also applied small interfering RNA in vitro to study the mechanism of ITGB5 in regulating high glucose-induced cell apoptosis. RESULTS ITGB5 and its ligand, fibronectin, were both upregulated after exposure to high glucose in vivo and in vitro . ITGB5 knockdown alleviated hyperglycemia-induced vascular endothelial cell apoptosis and microvascular rarefaction in vivo.In vitro analysis revealed that knockdown of either ITGB5 or fibronectin ameliorated high glucose-induced apoptosis in human umbilical vascular endothelial cells (HUVECs). In addition, knockdown of ITGB5 inhibited fibronectin-induced HUVEC apoptosis, which indicated that the fibronectin-ITGB5 interaction participated in high glucose-induced endothelial cell apoptosis. By using RNA-sequencing technology and bioinformatic analysis, we identified Forkhead Box Protein O1 (FoxO1) as an important downstream target regulated by ITGB5. Moreover, we demonstrated that the excessive macroautophagy induced by high glucose can contribute to HUVEC apoptosis, which was regulated by the ITGB5-FoxO1 axis. CONCLUSION The study revealed that high glucose-induced endothelial cell apoptosis was positively regulated by ITGB5, which suggested that ITGB5 could potentially be used to predict and treat DM-related vascular complications.
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Affiliation(s)
- Xuze Lin
- Department of Cardiology, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Science and Peking Union Medical College, Beijing 100037, China
| | - Sizhuang Huang
- Department of Cardiology, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Science and Peking Union Medical College, Beijing 100037, China
| | - Side Gao
- Department of Cardiology, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Science and Peking Union Medical College, Beijing 100037, China
| | - Jinxing Liu
- Department of Cardiology, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Science and Peking Union Medical College, Beijing 100037, China
| | - Jiong Tang
- Department of Cardiology, Fuwai Yunnan Cardiovascular Hospital, Kunming, Yunnan 650000, China
| | - Mengyue Yu
- Department of Cardiology, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Science and Peking Union Medical College, Beijing 100037, China
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Choi S, Sarker MK, Yu MR, Lee H, Kwon SH, Jeon JS, Noh H, Kim H. MicroRNA-5010-5p ameliorates high-glucose induced inflammation in renal tubular epithelial cells by modulating the expression of PPP2R2D. BMJ Open Diabetes Res Care 2024; 12:e003784. [PMID: 38442987 DOI: 10.1136/bmjdrc-2023-003784] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/19/2023] [Accepted: 02/08/2024] [Indexed: 03/07/2024] Open
Abstract
INTRODUCTION We previously reported the significant upregulation of eight circulating exosomal microRNAs (miRNAs) in patients with diabetic kidney disease (DKD). However, their specific roles and molecular mechanisms in the kidney remain unknown. Among the eight miRNAs, we evaluated the effects of miR-5010-5p on renal tubular epithelial cells under diabetic conditions in this study. RESEARCH DESIGN AND METHODS We transfected the renal tubular epithelial cell line, HK-2, with an miR-5010-5p mimic using recombinant plasmids. The target gene of hsa-miR-5010-5p was identified using a dual-luciferase assay. Cell viability was assessed via the 3-(4, 5-dimethylthiazol-2-yl)-2, 5-diphenyltetrazolium bromide assay. Moreover, mRNA and protein expression levels were determined via real-time PCR and western blotting, respectively. RESULTS High glucose levels did not significantly affect the intracellular expression of miR-5010-5p in HK-2 cells. Transfection of the miR-5010-5p mimic caused no change in cell viability. However, miR-5010-5p-transfected HK-2 cells exhibited significantly decreased expression levels of inflammatory cytokines, such as the monocyte chemoattractant protein-1, interleukin-1β, and tumor necrosis factor-ɑ, under high-glucose conditions. These changes were accompanied by the restored expression of phosphorylated AMP-activated protein kinase (AMPK) and decreased phosphorylation of nuclear factor-kappa B. Dual-luciferase assay revealed that miR-5010-5p targeted the gene, protein phosphatase 2 regulatory subunit B delta (PPP2R2D), a subunit of protein phosphatase 2A, which modulates AMPK phosphorylation. CONCLUSIONS Our findings suggest that increased miR-5010-5p expression reduces high glucose-induced inflammatory responses in renal tubular epithelial cells via the regulation of the target gene, PPP2R2D, which modulates AMPK phosphorylation. Therefore, miR-5010-5p may be a promising therapeutic target for DKD.
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Affiliation(s)
- Sunghee Choi
- Hyonam Kidney Laboratory, Seoul, Korea (the Republic of)
| | | | - Mi Ra Yu
- Hyonam Kidney Laboratory, Seoul, Korea (the Republic of)
| | - Haekyung Lee
- Hyonam Kidney Laboratory, Seoul, Korea (the Republic of)
- Division of Nephrology, Department of Internal Medicine, Soonchunhyang University Seoul Hospital, Seoul, Korea (the Republic of)
| | - Soon Hyo Kwon
- Hyonam Kidney Laboratory, Seoul, Korea (the Republic of)
- Division of Nephrology, Department of Internal Medicine, Soonchunhyang University Seoul Hospital, Seoul, Korea (the Republic of)
| | - Jin Seok Jeon
- Hyonam Kidney Laboratory, Seoul, Korea (the Republic of)
- Division of Nephrology, Department of Internal Medicine, Soonchunhyang University Seoul Hospital, Seoul, Korea (the Republic of)
| | - Hyunjin Noh
- Hyonam Kidney Laboratory, Seoul, Korea (the Republic of)
- Division of Nephrology, Department of Internal Medicine, Soonchunhyang University Seoul Hospital, Seoul, Korea (the Republic of)
| | - Hyoungnae Kim
- Hyonam Kidney Laboratory, Seoul, Korea (the Republic of)
- Division of Nephrology, Department of Internal Medicine, Soonchunhyang University Seoul Hospital, Seoul, Korea (the Republic of)
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Sone K, Sakamaki Y, Hirose S, Inagaki M, Tachikawa M, Yoshino D, Funamoto K. Hypoxia suppresses glucose-induced increases in collective cell migration in vascular endothelial cell monolayers. Sci Rep 2024; 14:5164. [PMID: 38431674 PMCID: PMC10908842 DOI: 10.1038/s41598-024-55706-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2023] [Accepted: 02/27/2024] [Indexed: 03/05/2024] Open
Abstract
Blood glucose levels fluctuate during daily life, and the oxygen concentration is low compared to the atmosphere. Vascular endothelial cells (ECs) maintain vascular homeostasis by sensing changes in glucose and oxygen concentrations, resulting in collective migration. However, the behaviors of ECs in response to high-glucose and hypoxic environments and the underlying mechanisms remain unclear. In this study, we investigated the collective migration of ECs simultaneously stimulated by changes in glucose and oxygen concentrations. Cell migration in EC monolayer formed inside the media channels of microfluidic devices was observed while varying the glucose and oxygen concentrations. The cell migration increased with increasing glucose concentration under normoxic condition but decreased under hypoxic condition, even in the presence of high glucose levels. In addition, inhibition of mitochondrial function reduced the cell migration regardless of glucose and oxygen concentrations. Thus, oxygen had a greater impact on cell migration than glucose, and aerobic energy production in mitochondria plays an important mechanistic role. These results provide new insights regarding vascular homeostasis relative to glucose and oxygen concentration changes.
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Affiliation(s)
- Kazuki Sone
- Graduate School of Biomedical Engineering, Tohoku University, 6-6-12 Aramaki-aza Aoba, Aoba-ku, Sendai, Miyagi, 980-8579, Japan
- Institute of Fluid Science, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, Miyagi, 980-8577, Japan
| | - Yuka Sakamaki
- Graduate School of Pharmaceutical Sciences, Tokushima University, 1-78-1 Sho-machi, Tokushima, Tokushima, 770-8505, Japan
| | - Satomi Hirose
- Graduate School of Biomedical Engineering, Tohoku University, 6-6-12 Aramaki-aza Aoba, Aoba-ku, Sendai, Miyagi, 980-8579, Japan
- Institute of Fluid Science, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, Miyagi, 980-8577, Japan
| | - Mai Inagaki
- Graduate School of Biomedical Sciences, Tokushima University, 1-78-1 Sho-machi, Tokushima, Tokushima, 770-8505, Japan
| | - Masanori Tachikawa
- Graduate School of Biomedical Sciences, Tokushima University, 1-78-1 Sho-machi, Tokushima, Tokushima, 770-8505, Japan
| | - Daisuke Yoshino
- Institute of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Naka-cho, Koganei, Tokyo, 184-8588, Japan
| | - Kenichi Funamoto
- Graduate School of Biomedical Engineering, Tohoku University, 6-6-12 Aramaki-aza Aoba, Aoba-ku, Sendai, Miyagi, 980-8579, Japan.
- Institute of Fluid Science, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, Miyagi, 980-8577, Japan.
- Graduate School of Engineering, Tohoku University, 6-6-1 Aramaki-aza Aoba, Aoba-ku, Sendai, Miyagi, 980-8597, Japan.
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Usta A, Yüksek V, Çetin S, Dede S. Lycopene prevents cell death in NRK-52E cells by inhibition of high glucose-activated DNA damage and apoptotic, autophagic, and necrotic pathways. J Biochem Mol Toxicol 2024; 38:e23678. [PMID: 38444079 DOI: 10.1002/jbt.23678] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2023] [Revised: 01/13/2024] [Accepted: 02/23/2024] [Indexed: 03/07/2024]
Abstract
This study aims to investigate the effects of lycopene on apoptotic, autophagic, and necrotic pathways, oxidative status, and DNA damage in diabetic nephropathy at the molecular level. The sample of the study includes seven groups: lycopene (L), high glucose (G), high glucose + lycopene (GL), and control (C) groups tested at 12 and 24 h. The expression levels of genes in oxidative, apoptotic, autophagic, and necrotic cell death pathways are determined by reverse transcription-quantitative polymerase chain reaction analysis. The comet assay method is used for the analysis of DNA damage. It is observed that adding lycopene to high glucose for protective purposes reduces the expression of genes related to apoptosis, autophagy, and necrosis, as well as the DNA damage index, compared to cells given high glucose alone. Lycopene can be a safe and effective alternative agent.
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Affiliation(s)
- Ayşe Usta
- Department of Chemistry, Faculty of Science, Van Yuzuncu Yil University, Van, Turkey
| | - Veysel Yüksek
- Department of Medical Laboratory Technician, Ozalp Regional High School, Van Yuzuncu Yil University, Van, Turkey
| | - Sedat Çetin
- Department of Veterinary Medicine, Vocational School of Health Services, Ankara Yıldırım Beyazıt University, Ankara, Turkey
| | - Semiha Dede
- Department of Biochemistry, Faculty of Veterinary Medicine, Van Yuzuncu Yil University, Van, Turkey
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Öğünç Keçeci Y, İncesu Z. Aglycemia induces apoptosis under hypoxic conditions in A549 cells. Cell Biochem Funct 2024; 42:e3983. [PMID: 38493450 DOI: 10.1002/cbf.3983] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2023] [Revised: 03/06/2024] [Accepted: 03/06/2024] [Indexed: 03/19/2024]
Abstract
Many of the cancer cells produce energy with accelerated glycolysis and perform lactic acid production even under normoxic conditions called the "Warburg effect". Metabolism can directly or indirectly regulate the apoptotic mechanism so that cancer cells take advantage of reprogrammed metabolism to avoid apoptosis. The aim of this study is to examine the mechanism of apoptosis by incubating human lung carcinoma cells (A549) under different metabolic conditions in hypoxia or normoxia environments. A549 cells were incubated in the normoxic or hypoxic condition that contained 5 mM glucose (Glc 5), 25 mM glucose (Glc 25), or 10 mM galactose (OXPHOS/aglycemic), and the mechanism of apoptosis was investigated. In the hypoxia condition, the rate of early apoptosis in aglycemic OXPHOS cells was increased (15.5% ±7.1). In addition, the activity of caspase-3 (6.1% ± 0.9), caspase-9 (30.4% ± 0.9), and cytochrome c expression level increased; however, the mitochondrial membrane potential (51.9% ± 0.4) was found to be decreased. Changing the amount of oxygen in glycolytic cells had no effect on apoptosis. However, it has been determined that apoptosis is stimulated under hypoxia conditions in aglycemic cells in which galactose is used instead of glucose. Considering that the majority of cancer cells are hypoxic, these data are important in determining targets in therapeutic intervention.
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Affiliation(s)
- Yüksel Öğünç Keçeci
- Department of Biochemistry, Faculty of Pharmacy, Anadolu University, Eskişehir, Turkey
| | - Zerrin İncesu
- Department of Biochemistry, Faculty of Pharmacy, Anadolu University, Eskişehir, Turkey
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Torres TM, Almeida-Monteiro PSD, Nascimento RVD, Cândido-Sobrinho SA, Sousa CTN, Ferreira YM, de Paula KT, Salmito-Vanderley CSB. Effects of taurine, cysteine and melatonin as antioxidant supplements to the freezing medium of Prochilodus brevis sperm. Cryobiology 2024; 114:104858. [PMID: 38346570 DOI: 10.1016/j.cryobiol.2024.104858] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2023] [Revised: 12/17/2023] [Accepted: 02/01/2024] [Indexed: 02/17/2024]
Abstract
Cryopreservation consist of a set of methods to preserve cells and tissues by drastically reducing the temperature. Among some undesired effects, cryopreservation might generate reactive oxygen species that lead to an increase of oxidative stress, causing damage to cells. This study aimed to test taurine, cysteine, and melatonin on the freezing of Prochilodus brevis sperm and assess its effects on post-thawed sperm quality. Sperm was collected and seven pools were formed (n = 7). They were diluted (1:9) in standard medium (5% glucose, 10% dimethyl sulfoxide and 5% egg yolk) supplemented or not (control) with taurine (0.3, 1.0, 3.16 or 10.0 mM), cysteine (0.3, 1.0, 3.16 or 10.0 mM) or melatonin (0.6, 1.12, 2.0 or 3.56 mM). Post-thawed sperm was evaluated for kinetic (total motility, velocities, and percentage of rapid cells), morphology and membrane and DNA integrity. Differences were found when melatonin was used as an antioxidant. For the variables rapid sperm and sperm velocities, 3.56 mM melatonin presented higher results than the control (melatonin 0 mM). Melatonin 2 mM was similar to 3.56 mM on rapid sperm, average path velocity (VAP) and curvilinear velocity (VCL). No difference was found between concentration 0 mM (control) and taurine treatments. As for cysteine, 0.3 mM presented the best results for rapid sperm than 10 mM, and higher VCL and VAP than 1 mM. Melatonin 3.56 mM presented higher results on kinetic parameters (rapid motility, VCL, VSL and VAP) than other tested antioxidants. Therefore, melatonin 3.56 mM is recommended to be added to the sperm freezing medium of P. brevis.
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Affiliation(s)
- Thais Maia Torres
- Fish Reproduction Biotechnology Laboratory, Postgraduate Program in Veterinary Science, State University of Ceará, Ceará, Brazil.
| | | | | | | | - Carla Tatiana Nascimento Sousa
- Fish Reproduction Biotechnology Laboratory, Postgraduate Program in Veterinary Science, State University of Ceará, Ceará, Brazil
| | - Yasmim Maia Ferreira
- Fish Reproduction Biotechnology Laboratory, Postgraduate Program in Veterinary Science, State University of Ceará, Ceará, Brazil
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