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Zhang Z, Luan C, Wang C, Li T, Wu Y, Huang X, Jin B, Zhang E, Gong Q, Zhou X, Li X. Insulin resistance and its relationship with long-term exposure to ozone: Data based on a national population cohort. JOURNAL OF HAZARDOUS MATERIALS 2024; 472:134504. [PMID: 38704910 DOI: 10.1016/j.jhazmat.2024.134504] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2024] [Revised: 04/14/2024] [Accepted: 04/30/2024] [Indexed: 05/07/2024]
Abstract
The relationship of ozone (O3), particularly the long-term exposure, with impacting metabolic homeostasis in population was understudied and under-recognised. Here, we used data from ChinaHEART, a nationwide, population-based cohort study, combined with O3 and PM2.5 concentration data with high spatiotemporal resolution, to explore the independent association of exposure to O3 with the prevalence of insulin resistance (IR). Among the 271 540 participants included, the crude prevalence of IR was 39.1%, while the age and sex standardized prevalence stood at 33.0%. Higher IR prevalence was observed with each increase of 10.0 μg/m3 in long-term O3 exposure, yielding adjusted odds ratios (OR) of 1.084 (95% CI: 1.079-1.089) in the one-pollutant model and 1.073 (95% CI: 1.067-1.079) in the two-pollutant model. Notably, a significant additive interaction between O3 and PM2.5 on the prevalence of IR was observed (P for additive interaction < 0.001). Our main findings remained consistent and robust in the sensitivity analyses. Our study suggests long-term exposure to O3 was independently and positively associated with prevalence of IR. It emphasized the benefits of policy interventions to reduce O3 and PM2.5 exposure jointly, which could ultimately alleviate the health and economic burden related to DM.
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Affiliation(s)
- Zenglei Zhang
- National Clinical Research Center of Cardiovascular Diseases, State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, People's Republic of China; Department of Cardiology, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, People's Republic of China
| | - Cheng Luan
- Unit of Islet Pathophysiology, Department of Clinical Sciences Malmö, Lund University Diabetes Centre, Lund University, Malmö 21428, Sweden
| | - Chunqi Wang
- National Clinical Research Center of Cardiovascular Diseases, State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, People's Republic of China
| | - Tiantian Li
- China CDC Key Laboratory of Environment and Population Health, National Institute of Environmental Health, Chinese Center for Disease Control and Prevention, Beijing, People's Republic of China
| | - Yi Wu
- National Clinical Research Center of Cardiovascular Diseases, State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, People's Republic of China
| | - Xin Huang
- National Clinical Research Center of Cardiovascular Diseases, State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, People's Republic of China
| | - Bolin Jin
- National Clinical Research Center of Cardiovascular Diseases, State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, People's Republic of China
| | - Enming Zhang
- Unit of Islet Pathophysiology, Department of Clinical Sciences Malmö, Lund University Diabetes Centre, Lund University, Malmö 21428, Sweden
| | - Qiuhong Gong
- Center of Endocrinology, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, People's Republic of China
| | - Xianliang Zhou
- Department of Cardiology, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, People's Republic of China.
| | - Xi Li
- National Clinical Research Center of Cardiovascular Diseases, State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, People's Republic of China; Fuwai Hospital Chinese Academy of Medical Sciences, Shenzhen, Shenzhen, People's Republic of China; Central China Sub-center of the National Center for Cardiovascular Diseases, Zhengzhou, People's Republic of China.
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Zhang Z, Zhao L, Lu Y, Xiao Y, Zhou X. Insulin resistance assessed by estimated glucose disposal rate and risk of incident cardiovascular diseases among individuals without diabetes: findings from a nationwide, population based, prospective cohort study. Cardiovasc Diabetol 2024; 23:194. [PMID: 38844981 PMCID: PMC11157942 DOI: 10.1186/s12933-024-02256-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/12/2024] [Accepted: 04/30/2024] [Indexed: 06/09/2024] Open
Abstract
BACKGROUND Recent studies have suggested that insulin resistance (IR) contributes to the development of cardiovascular diseases (CVD), and the estimated glucose disposal rate (eGDR) is considered to be a reliable surrogate marker of IR. However, most existing evidence stems from studies involving diabetic patients, potentially overstating the effects of eGDR on CVD. Therefore, the primary objective of this study is to examine the relationship of eGDR with incidence of CVD in non-diabetic participants. METHOD The current analysis included individuals from the China Health and Retirement Longitudinal Study (CHARLS) who were free of CVD and diabetes mellitus but had complete data on eGDR at baseline. The formula for calculating eGDR was as follows: eGDR (mg/kg/min) = 21.158 - (0.09 × WC) - (3.407 × hypertension) - (0.551 × HbA1c) [WC (cm), hypertension (yes = 1/no = 0), and HbA1c (%)]. The individuals were categorized into four subgroups according to the quartiles (Q) of eGDR. Crude incidence rate and hazard ratios (HRs) with 95% confidence intervals (CIs) were computed to investigate the association between eGDR and incident CVD, with the lowest quartile of eGDR (indicating the highest grade of insulin resistance) serving as the reference. Additionally, the multivariate adjusted restricted cubic spine (RCS) was employed to examine the dose-response relationship. RESULTS We included 5512 participants in this study, with a mean age of 58.2 ± 8.8 years, and 54.1% were female. Over a median follow-up duration of 79.4 months, 1213 incident CVD cases, including 927 heart disease and 391 stroke, were recorded. The RCS curves demonstrated a significant and linear relationship between eGDR and all outcomes (all P for non-linearity > 0.05). After multivariate adjustment, the lower eGDR levels were founded to be significantly associated with a higher risk of CVD. Compared with participants with Q1 of eGDR, the HRs (95% CIs) for those with Q2 - 4 were 0.88 (0.76 - 1.02), 0.69 (0.58 - 0.82), and 0.66 (0.56 - 0.79). When assessed as a continuous variable, per 1.0-SD increase in eGDR was associated a 17% (HR: 0.83, 95% CI: 0.78 - 0.89) lower risk of CVD, with the subgroup analyses indicating that smoking status modified the association (P for interaction = 0.012). Moreover, the mediation analysis revealed that obesity partly mediated the association. Additionally, incorporating eGDR into the basic model considerably improve the predictive ability for CVD. CONCLUSION A lower level of eGDR was found to be associated with increased risk of incident CVD among non-diabetic participants. This suggests that eGDR may serve as a promising and preferable predictor and intervention target for CVD.
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Affiliation(s)
- Zenglei Zhang
- Department of Cardiology, National Center for Cardiovascular Diseases, Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, No.167, Beilishi Road, 100037, Xicheng DistrictBeijing, China
| | - Lin Zhao
- Department of Cardiology, National Center for Cardiovascular Diseases, Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, No.167, Beilishi Road, 100037, Xicheng DistrictBeijing, China
| | - Yiting Lu
- Department of Cardiology, National Center for Cardiovascular Diseases, Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, No.167, Beilishi Road, 100037, Xicheng DistrictBeijing, China
| | - Yan Xiao
- Department of Cardiology, National Center for Cardiovascular Diseases, Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, No.167, Beilishi Road, 100037, Xicheng DistrictBeijing, China.
| | - Xianliang Zhou
- Department of Cardiology, National Center for Cardiovascular Diseases, Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, No.167, Beilishi Road, 100037, Xicheng DistrictBeijing, China.
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Bravo Sánchez E, Nolasco Ruíz CJ, Gómez-Barroso M, Cortés Rojo C, Rodríguez Orozco AR, Saavedra Molina A, Manzo Ávalos S, Montoya Pérez R. Diazoxide and moderate-intensity exercise improve skeletal muscle function by decreasing oxidants and enhancing antioxidant defenses in hypertensive male rats. Physiol Rep 2024; 12:e16026. [PMID: 38653584 DOI: 10.14814/phy2.16026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2023] [Revised: 04/10/2024] [Accepted: 04/10/2024] [Indexed: 04/25/2024] Open
Abstract
High sodium intake is decisive in the incidence increase and prevalence of hypertension, which has an impact on skeletal muscle functionality. Diazoxide is an antihypertensive agent that inhibits insulin secretion and is an opener of KATP channels (adosine triphosphate sensitive potasium channels). For this reason, it is hypothesized that moderate-intensity exercise and diazoxide improve skeletal muscle function by reducing the oxidants in hypertensive rats. Male Wistar rats were assigned into eight groups: control (CTRL), diazoxide (DZX), exercise (EX), exercise + diazoxide (EX + DZX), hypertension (HTN), hypertension + diazoxide (HTN + DZX), hypertension + exercise (HTN + EX), and hypertension + exercise + diazoxide (HTN + EX + DZX). To induce hypertension, the rats received 8% NaCl dissolved in water orally for 30 days; in the following 8 weeks, 4% NaCl was supplied to maintain the pathology. The treatment with physical exercise of moderate intensity lasted 8 weeks. The administration dose of diazoxide was 35 mg/kg intraperitoneally for 14 days. Tension recording was performed on the extensor digitorum longus and the soleus muscle. Muscle homogenates were used to measure oxidants using fluorescent probe and the activity of antioxidant systems. Diazoxide and moderate-intensity exercise reduced oxidants and increased antioxidant defenses.
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Affiliation(s)
- Estefanía Bravo Sánchez
- Instituto de Investigaciones Químico-Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Morelia, Mexico
| | - César J Nolasco Ruíz
- Instituto de Investigaciones Químico-Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Morelia, Mexico
| | - Mariana Gómez-Barroso
- Instituto de Investigaciones Químico-Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Morelia, Mexico
| | - Christian Cortés Rojo
- Instituto de Investigaciones Químico-Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Morelia, Mexico
| | - Alain R Rodríguez Orozco
- Facultad de Ciencias Médicas y Biológicas "Dr. Ignacio Chávez", Universidad Michoacana de San Nicolás de Hidalgo, Morelia, Mexico
| | - Alfredo Saavedra Molina
- Instituto de Investigaciones Químico-Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Morelia, Mexico
| | - Salvador Manzo Ávalos
- Instituto de Investigaciones Químico-Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Morelia, Mexico
| | - Rocío Montoya Pérez
- Instituto de Investigaciones Químico-Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Morelia, Mexico
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Lu Z, Xiong Y, Feng X, Yang K, Gu H, Zhao X, Meng X, Wang Y. Insulin resistance estimated by estimated glucose disposal rate predicts outcomes in acute ischemic stroke patients. Cardiovasc Diabetol 2023; 22:225. [PMID: 37633905 PMCID: PMC10464388 DOI: 10.1186/s12933-023-01925-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/10/2023] [Accepted: 07/18/2023] [Indexed: 08/28/2023] Open
Abstract
BACKGROUND Estimated glucose disposal rate (eGDR), a simple and noninvasive measure of insulin resistance, has been proven to be an independent risk factor for first-time stroke and all-cause mortality. In this study, we aimed to investigate the associations between eGDR and the stroke outcome in patients with first-time acute ischemic stroke (AIS). METHODS We included first-time AIS patients with available data on eGDR in the China National Stroke Registry III (CNSR-III), and divided the subjects into lower eGDR group (eGDR ≤ 6 mg/kg/min) and higher eGDR group (eGDR > 6 mg/kg/min). The primary outcome was excellent functional outcome (modified Rankin Scale score 0-1) at 3 months. Secondary outcomes included stroke recurrence and favorable functional outcome (modified Rankin Scale score 0-2) at 3 months, and functional outcome and combined vascular event at one year. Univariate and multivariate analyses were performed to evaluate the association between eGDR and outcomes. RESULTS A total of 6,271 patients with AIS were included in this study. The median values of eGDR in lower and higher eGDR group were 5.0 mg/kg/min (interquartile range, 4.2-5.6) and 7.6 mg/kg/min (interquartile range, 6.8-9.6), respectively. Patients with higher eGDR were significantly associated with higher incidence of excellent functional outcome (adjusted odds ratio, 1.24; 95% confidence interval, 1.06-1.45; P < 0.01) at 3 months and favorable (adjusted odds ratio, 1.55; 95% confidence interval, 1.24-1.93; P < 0.01) and excellent (adjusted odds ratio, 1.28; 95% confidence interval, 1.08-1.51; P < 0.01) functional outcome at one year. However, there was no significant difference in stroke recurrence between these two groups at 3 months (adjusted odds ratio, 0.81; 95% confidence interval, 0.61-1.06; P = 0.12) and one year (adjusted odds ratio, 0.91; 95% confidence interval, 0.73-1.14; P = 0.41). CONCLUSION eGDR is a predictor of functional outcome in patients with AIS, independent of traditional cardiovascular predictors.
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Affiliation(s)
- Zhengzhao Lu
- Department of Neurology, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
- China National Clinical Research Center for Neurological Diseases, Beijing, China
| | - Yunyun Xiong
- Department of Neurology, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
- China National Clinical Research Center for Neurological Diseases, Beijing, China
- Chinese Institute for Brain Research, Beijing, China
| | - Xueyan Feng
- Department of Neurology, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Kaixuan Yang
- China National Clinical Research Center for Neurological Diseases, Beijing, China
- National Center for Healthcare Quality Management in Neurological Diseases, Beijing, China
| | - Hongqiu Gu
- China National Clinical Research Center for Neurological Diseases, Beijing, China
- National Center for Healthcare Quality Management in Neurological Diseases, Beijing, China
| | - Xingquan Zhao
- Department of Neurology, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
- China National Clinical Research Center for Neurological Diseases, Beijing, China
| | - Xia Meng
- China National Clinical Research Center for Neurological Diseases, Beijing, China
| | - Yongjun Wang
- Department of Neurology, Beijing Tiantan Hospital, Capital Medical University, Beijing, China.
- China National Clinical Research Center for Neurological Diseases, Beijing, China.
- Chinese Institute for Brain Research, Beijing, China.
- Research Unit of Artificial Intelligence in Cerebrovascular Disease, Chinese Academy of Medical Sciences, 2019RU018, Beijing, China.
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Wilkerson-Vidal QC, Wimalarathne M, Collins G, Wolfsberger JG, Clopp A, Mercado L, Fowler E, Gibson H, McConnell V, Martin S, Hunt EC, Vogler B, Love-Rutledge ST. Young adult male LEW.1WR1 rats have reduced beta cell area and develop glucose intolerance. Mol Cell Endocrinol 2023; 562:111837. [PMID: 36549462 DOI: 10.1016/j.mce.2022.111837] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/12/2022] [Revised: 12/15/2022] [Accepted: 12/19/2022] [Indexed: 12/24/2022]
Abstract
Prediabetes affects 1 in 3 American adults and is characterized by insulin resistance, insulin hypersecretion, and impaired glucose tolerance. Weanling LEW.1WR1 (1WR1) rats have increased blood insulin concentrations, so we hypothesized that young adult 1WR1 rats would develop impaired glucose tolerance due to the poor regulation of insulin. We monitored glucose tolerance, insulin tolerance, and weight gain for 10 weeks to assess if there was a decline in glucose processing over time. 1WR1 rats were significantly more glucose intolerant after 8 weeks. 1WR1 rats had increased body mass, yet abdominal fat mass was not significantly increased. Although the 1WR1 rats had increased circulating insulin and glucagon protein levels, 1WR1 rat beta cell area was significantly reduced. There may be underlying insulin resistance as evidenced by dysfunctional insulin regulation during fasting. Understanding the metabolic phenotype of this rat model can provide insight into the human pathophysiological changes that increase susceptibility to glucose intolerance and prediabetes.
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Affiliation(s)
- Quiana C Wilkerson-Vidal
- The University of Alabama Huntsville, Department of Chemistry, Materials Science Building 201, John Wright Drive, Huntsville, AL, 35899, USA; The University of Alabama in Huntsville, Department of Biology, Shelby Center for Science and Technology, 301 Sparkman Drive, Huntsville, AL, 35899, USA.
| | - Madushika Wimalarathne
- The University of Alabama Huntsville, Department of Chemistry, Materials Science Building 201, John Wright Drive, Huntsville, AL, 35899, USA; The University of Alabama in Huntsville, Department of Biology, Shelby Center for Science and Technology, 301 Sparkman Drive, Huntsville, AL, 35899, USA.
| | - Genoah Collins
- The University of Alabama Huntsville, Department of Chemistry, Materials Science Building 201, John Wright Drive, Huntsville, AL, 35899, USA.
| | - James Gerard Wolfsberger
- The University of Alabama Huntsville, Department of Chemistry, Materials Science Building 201, John Wright Drive, Huntsville, AL, 35899, USA.
| | - Amelia Clopp
- The University of Alabama in Huntsville, Department of Biology, Shelby Center for Science and Technology, 301 Sparkman Drive, Huntsville, AL, 35899, USA.
| | - Luis Mercado
- The University of Alabama in Huntsville, Department of Biology, Shelby Center for Science and Technology, 301 Sparkman Drive, Huntsville, AL, 35899, USA.
| | - Evann Fowler
- The University of Alabama in Huntsville, Department of Biology, Shelby Center for Science and Technology, 301 Sparkman Drive, Huntsville, AL, 35899, USA.
| | - Helen Gibson
- The University of Alabama in Huntsville, Department of Biology, Shelby Center for Science and Technology, 301 Sparkman Drive, Huntsville, AL, 35899, USA.
| | - Victoria McConnell
- The University of Alabama in Huntsville, Department of Biology, Shelby Center for Science and Technology, 301 Sparkman Drive, Huntsville, AL, 35899, USA.
| | - Sidney Martin
- The University of Alabama Huntsville, Department of Chemistry, Materials Science Building 201, John Wright Drive, Huntsville, AL, 35899, USA; The University of Alabama in Huntsville, Department of Biology, Shelby Center for Science and Technology, 301 Sparkman Drive, Huntsville, AL, 35899, USA.
| | - Emily C Hunt
- The University of Alabama Huntsville, Department of Chemistry, Materials Science Building 201, John Wright Drive, Huntsville, AL, 35899, USA.
| | - Bernhard Vogler
- The University of Alabama Huntsville, Department of Chemistry, Materials Science Building 201, John Wright Drive, Huntsville, AL, 35899, USA.
| | - Sharifa T Love-Rutledge
- The University of Alabama Huntsville, Department of Chemistry, Materials Science Building 201, John Wright Drive, Huntsville, AL, 35899, USA.
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Afifi SM, Ammar NM, Kamel R, Esatbeyoglu T, Hassan HA. β-Sitosterol Glucoside-Loaded Nanosystem Ameliorates Insulin Resistance and Oxidative Stress in Streptozotocin-Induced Diabetic Rats. Antioxidants (Basel) 2022; 11:1023. [PMID: 35624887 PMCID: PMC9137832 DOI: 10.3390/antiox11051023] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2022] [Revised: 05/18/2022] [Accepted: 05/19/2022] [Indexed: 12/16/2022] Open
Abstract
β-Sitosterol glucoside (SG), isolated from Senecio petasitis (Family Asteraceae), was loaded in self-nanoemulsifying drug delivery systems (SEDDS) in a trial to enhance its solubility and biological effect. Various co-surfactants were tested to prepare a successful SEDDS. The selected SG-loaded SEDDS had a droplet size of 134 ± 15.2 nm with a homogenous distribution (polydispersity index 0.296 ± 0.02). It also demonstrated a significant augmentation of SG in vitro release by 4-fold compared to the free drug suspension. The in vivo insulin sensitivity and antidiabetic effect of the prepared SG-loaded SEDDS were further assessed in streptozotocin-induced hyperglycemic rats. The hypoglycemic effect of SG-loaded nanosystem was evidenced by decreased serum glucose and insulin by 63.22% and 53.11%, respectively. Homeostasis model assessment-insulin resistance (HOMA-IR) index demonstrated a significant reduction by 5.4-fold in the diabetic group treated by SG-loaded nanosystem and exhibited reduced glucagon level by 40.85%. In addition, treatment with SG-loaded nanosystem significantly decreased serum MDA (malondialdehyde) and increased catalase levels by 38.31% and 64.45%, respectively. Histopathological investigations also supported the protective effect of SG-loaded nanosystem on the pancreas. The promising ability of SG-loaded nanosystem to ameliorate insulin resistance, protect against oxidative stress, and restore pancreatic β-cell secretory function warrants its inclusion in further studies during diabetes progression.
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Affiliation(s)
- Sherif M. Afifi
- Pharmacognosy Department, Faculty of Pharmacy, University of Sadat City, Sadat City 32897, Egypt
| | - Naglaa M. Ammar
- Therapeutic Chemistry Department, National Research Centre, 33 El Bohouth St., Dokki, Giza 12622, Egypt; (N.M.A.); (H.A.H.)
| | - Rabab Kamel
- Pharmaceutical Technology Department, National Research Centre, Cairo 12622, Egypt;
| | - Tuba Esatbeyoglu
- Department of Food Development and Food Quality, Institute of Food Science and Human Nutrition, Gottfried Wilhelm Leibniz University Hannover, Am Kleinen Felde 30, 30167 Hannover, Germany
| | - Heba A. Hassan
- Therapeutic Chemistry Department, National Research Centre, 33 El Bohouth St., Dokki, Giza 12622, Egypt; (N.M.A.); (H.A.H.)
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Jing FY, Zhou YZ, Wang HY, Yin XL, Zhang YQ. Enhancing antioxidant and anti-hyperglycaemic functions of gingko biloba L. seeds using thermal detoxification. J Funct Foods 2021. [DOI: 10.1016/j.jff.2021.104819] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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Yap KH, Yee GS, Candasamy M, Tan SC, Md S, Abdul Majeed AB, Bhattamisra SK. Catalpol Ameliorates Insulin Sensitivity and Mitochondrial Respiration in Skeletal Muscle of Type-2 Diabetic Mice Through Insulin Signaling Pathway and AMPK/SIRT1/PGC-1α/PPAR-γ Activation. Biomolecules 2020; 10:biom10101360. [PMID: 32987623 PMCID: PMC7598587 DOI: 10.3390/biom10101360] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2020] [Revised: 09/06/2020] [Accepted: 09/09/2020] [Indexed: 12/14/2022] Open
Abstract
Catalpol was tested for various disorders including diabetes mellitus. Numerous molecular mechanisms have emerged supporting its biological effects but with little information towards its insulin sensitizing effect. In this study, we have investigated its effect on skeletal muscle mitochondrial respiration and insulin signaling pathway. Type-2 diabetes (T2DM) was induced in male C57BL/6 by a high fat diet (60% Kcal) and streptozotocin (50 mg/kg, i.p.). Diabetic mice were orally administered with catalpol (100 and 200 mg/kg), metformin (200 mg/kg), and saline for four weeks. Fasting blood glucose (FBG), HbA1c, plasma insulin, oral glucose tolerance test (OGTT), insulin tolerance test (ITT), oxygen consumption rate, gene (IRS-1, Akt, PI3k, AMPK, GLUT4, and PGC-1α) and protein (AMPK, GLUT4, and PPAR-γ) expression in muscle were measured. Catalpol (200 mg/kg) significantly (p < 0.05) reduced the FBG, HbA1C, HOMA_IR index, and AUC of OGTT whereas, improved the ITT slope. Gene (IRS-1, Akt, PI3k, GLUT4, AMPK, and PGC-1α) and protein (AMPK, p-AMPK, PPAR-γ and GLUT4) expressions, as well as augmented state-3 respiration, oxygen consumption rate, and citrate synthase activity in muscle was observed in catalpol treated mice. The antidiabetic activity of catalpol is credited with a marked improvement in insulin sensitivity and mitochondrial respiration through the insulin signaling pathway and AMPK/SIRT1/PGC-1α/PPAR-γ activation in the skeletal muscle of T2DM mice.
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Affiliation(s)
- Kah Heng Yap
- School of Postgraduate Studies, International Medical University, Bukit Jalil, Kuala Lumpur 57000, Malaysia; (K.H.Y.); (S.C.T.)
| | - Gan Sook Yee
- Department of Life Sciences, School of Pharmacy, International Medical University, Bukit Jalil, Kuala Lumpur 57000, Malaysia; (G.S.Y.); (M.C.)
| | - Mayuren Candasamy
- Department of Life Sciences, School of Pharmacy, International Medical University, Bukit Jalil, Kuala Lumpur 57000, Malaysia; (G.S.Y.); (M.C.)
| | - Swee Ching Tan
- School of Postgraduate Studies, International Medical University, Bukit Jalil, Kuala Lumpur 57000, Malaysia; (K.H.Y.); (S.C.T.)
| | - Shadab Md
- Department of Pharmaceutics, Faculty of Pharmacy, King Abdulaziz University, Jeddah 21589, Saudi Arabia;
| | - Abu Bakar Abdul Majeed
- Universiti Teknologi MARA, Sungai Buloh-Selayang Medical-Dental Campus, Jalan Hospital, Sungai Buloh, Selangor 47000, Malaysia;
| | - Subrat Kumar Bhattamisra
- Department of Life Sciences, School of Pharmacy, International Medical University, Bukit Jalil, Kuala Lumpur 57000, Malaysia; (G.S.Y.); (M.C.)
- Correspondence: or ; Tel.: +60-3-27317310; Fax: +60-3-86567229
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Kozawa J, Higashi M, Shimomura I, Hirano KI. Intractable Coronary Artery Disease in a Patient With Type 2 Diabetes Presenting With Triglyceride Deposit Cardiomyovasculopathy. Diabetes Care 2019; 42:983-986. [PMID: 30862655 DOI: 10.2337/dc18-2365] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/17/2018] [Accepted: 01/21/2019] [Indexed: 02/03/2023]
Affiliation(s)
- Junji Kozawa
- Department of Metabolic Medicine, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Masahiro Higashi
- Department of Radiology, Osaka National Hospital, National Hospital Organization, Osaka, Japan
| | - Iichiro Shimomura
- Department of Metabolic Medicine, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Ken-Ichi Hirano
- Laboratory of Cardiovascular Disease, Novel, Non-invasive, and Nutritional Therapeutics (CNT), Graduate School of Medicine, Osaka University, Osaka, Japan
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Kim G, Oh S, Jin SM, Hur KY, Kim JH, Lee MK. The efficacy and safety of adding either vildagliptin or glimepiride to ongoing metformin therapy in patients with type 2 diabetes mellitus. Expert Opin Pharmacother 2017; 18:1179-1186. [PMID: 28714741 DOI: 10.1080/14656566.2017.1353080] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
OBJECTIVE To compare the effects of either vildagliptin or glimepiride on glycemic variability, oxidative stress, and endothelial parameters in patients with type 2 diabetes mellitus (T2DM) inadequately controlled with metformin alone. METHODS In this randomized, open-label, parallel study, 34 patients with T2DM being treated with metformin having an HbA1c of 7.0-10.0% were allocated into either the vildagliptin or glimepiride group. A mixed-meal tolerance test and 72-hour continuous glucose monitoring were conducted, and urinary 8-iso-prostaglandinF2α (PGF2α) and endothelial-dependent flow-mediated dilatation (FMD) were evaluated at baseline and after 12 weeks of treatment. RESULTS Similar significant improvements in HbA1c level were shown in both vildagliptin (-0.8%) and glimepiride (-0.9%) groups after treatment (Ps<0.001). The mean amplitude of glycemic excursions (MAGE) and the mean of daily differences (MODD) were significantly decreased by vildagliptin (P = 0.044 and P = 0.031, respectively) but not by glimepiride. Glimepiride was significantly associated with a higher incidence of hypoglycemia than vildagliptin (P = 0.005). There were no significant differences in urinary 8-iso-PGF2α or FMD between the two groups. CONCLUSIONS Vildagliptin effectively improved glucose level with a significantly greater reduction in glycemic variability and hypoglycemia than glimepiride in patients with T2DM ongoing metformin therapy. The two drugs showed no significant differences in urinary 8-iso-PGF2α and FMD. TRIAL REGISTRATION NCT01404676.
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Affiliation(s)
- Gyuri Kim
- a Division of Endocrinology and Metabolism, Department of Medicine , Samsung Medical Center, Sungkyunkwan University School of Medicine , Seoul , Republic of Korea
| | - Sewon Oh
- a Division of Endocrinology and Metabolism, Department of Medicine , Samsung Medical Center, Sungkyunkwan University School of Medicine , Seoul , Republic of Korea
| | - Sang-Man Jin
- a Division of Endocrinology and Metabolism, Department of Medicine , Samsung Medical Center, Sungkyunkwan University School of Medicine , Seoul , Republic of Korea
| | - Kyu Yeon Hur
- a Division of Endocrinology and Metabolism, Department of Medicine , Samsung Medical Center, Sungkyunkwan University School of Medicine , Seoul , Republic of Korea
| | - Jae Hyeon Kim
- a Division of Endocrinology and Metabolism, Department of Medicine , Samsung Medical Center, Sungkyunkwan University School of Medicine , Seoul , Republic of Korea
| | - Moon-Kyu Lee
- a Division of Endocrinology and Metabolism, Department of Medicine , Samsung Medical Center, Sungkyunkwan University School of Medicine , Seoul , Republic of Korea
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Collison KS, Inglis A, Shibin S, Andres B, Ubungen R, Thiam J, Mata P, Al-Mohanna FA. Differential effects of early-life NMDA receptor antagonism on aspartame-impaired insulin tolerance and behavior. Physiol Behav 2016; 167:209-221. [DOI: 10.1016/j.physbeh.2016.09.011] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2016] [Revised: 08/09/2016] [Accepted: 09/13/2016] [Indexed: 01/15/2023]
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Kuroda Y, Iwahashi H, Mineo I, Fukui K, Fukuhara A, Iwamoto R, Imagawa A, Shimomura I. Hyperinsulinemic hypoglycemia syndrome associated with mutations in the human insulin receptor gene: report of two cases. Endocr J 2015; 62:353-62. [PMID: 25753915 DOI: 10.1507/endocrj.ej14-0547] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Insulinoma and insulin or insulin receptor (IR) autoantibodies are the main causes of hyperinsulinemic hypoglycemia in adults, but the exact cause in other cases remains obscure. This study is to determine the genetic basis of hyperinsulinemic hypoglycemia in two cases without the above abnormalities. Sequence analysis of IR gene in two patients with adult-onset hyperinsulinemic hypoglycemia and their relatives were performed, and the mutant gene observed in one case was analyzed. Both cases had normal levels of fasting plasma glucose (FPG), fasting hyperinsulinemia, low insulin sensitivity, and hypoglycemia with excessive insulin secretion during oral glucose tolerance test (OGTT). Both reported adult-onset postprandial hypoglycemic symptoms. In one patient, a missense mutation (Arg256Cys) was detected in both alleles of the IR gene, and his parents had the same mutation in only one allele but no hypoglycemia. The other had a novel nonsense mutation (Trp1273X) followed by a mutation (Gln1274Lys) in one allele, and his 9-year old son had the same mutation in one allele, together with hyperinsulinemic hypoglycemia during OGTT. Overexpression experiments of the mutant gene found in Case 1 in mammalian cells showed abnormal processing of the IR protein and demonstrated reduced function of Akt/Erk phosphorylation by insulin in the cells. In two cases of hyperinsulinemic hypoglycemia in adults, we found novel mutations in IR gene considered to be linked to hypoglycemia. We propose a disease entity of adult-onset hyperinsulinemic hypoglycemia syndrome associated with mutations in IR gene.
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Affiliation(s)
- Yohei Kuroda
- Department of Metabolic Medicine, Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
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Okita K, Iwahashi H, Kozawa J, Okauchi Y, Funahashi T, Imagawa A, Shimomura I. Usefulness of the insulin tolerance test in patients with type 2 diabetes receiving insulin therapy. J Diabetes Investig 2013; 5:305-12. [PMID: 24843779 PMCID: PMC4020335 DOI: 10.1111/jdi.12143] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/13/2013] [Revised: 06/13/2013] [Accepted: 07/30/2013] [Indexed: 01/08/2023] Open
Abstract
Aims/Introduction To establish the validity of the plasma glucose disappearance rate (KITT), derived from an insulin‐tolerance test (ITT), for evaluating the insulin sensitivity of patients with type 2 diabetes after insulin therapy. Materials and Methods In the first arm of the study, 19 patients with poorly controlled diabetes were treated with insulin and underwent an ITT and a euglycemic clamp test (clamp‐IR). The relationship between the insulin resistance index, as assessed by both the clamp‐IR and KITT tests, was examined. In the second arm of the study, the relationships between KITT values and various clinical parameters were investigated in 135 patients with poorly controlled diabetes, after achieving glycemic control with insulin. Results In study 1, a close correlation between KITT and the average glucose infusion rate during the last 30 min of the standard clamp‐IR test (M‐value) was noted (P < 0.001). In study 2, body mass index (P = 0.0011), waist circumference (P = 0.0004), visceral fat area (P = 0.0011) and the log‐transformed homeostasis model assessment of insulin resistance value (P = 0.0003) were negatively correlated with the log‐transformed KITT. High‐density lipoprotein cholesterol (P = 0.0183), low‐density lipoprotein cholesterol (P = 0.0121) and adiponectin (P = 0.0384) levels were positively correlated with the log‐transformed KITT. Conclusions The ITT is a valid and useful test for evaluating the insulin sensitivity of patients with diabetes, even after treatment with insulin.
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Affiliation(s)
- Kohei Okita
- Department of Metabolic Medicine Graduate School of Medicine Osaka University Suita City Osaka Japan
| | - Hiromi Iwahashi
- Department of Metabolic Medicine Graduate School of Medicine Osaka University Suita City Osaka Japan
| | - Junji Kozawa
- Department of Metabolic Medicine Graduate School of Medicine Osaka University Suita City Osaka Japan
| | - Yukiyoshi Okauchi
- Department of Metabolic Medicine Graduate School of Medicine Osaka University Suita City Osaka Japan
| | - Tohru Funahashi
- Department of Metabolic Medicine Graduate School of Medicine Osaka University Suita City Osaka Japan
| | - Akihisa Imagawa
- Department of Metabolic Medicine Graduate School of Medicine Osaka University Suita City Osaka Japan
| | - Iichiro Shimomura
- Department of Metabolic Medicine Graduate School of Medicine Osaka University Suita City Osaka Japan
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