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Khan I, Kaur S, Rishi AK, Boire B, Aare M, Singh M. Cannabidiol and Beta-Caryophyllene Combination Attenuates Diabetic Neuropathy by Inhibiting NLRP3 Inflammasome/NFκB through the AMPK/sirT3/Nrf2 Axis. Biomedicines 2024; 12:1442. [PMID: 39062016 PMCID: PMC11274582 DOI: 10.3390/biomedicines12071442] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2024] [Revised: 05/27/2024] [Accepted: 06/21/2024] [Indexed: 07/28/2024] Open
Abstract
BACKGROUND In this study, we investigated in detail the role of cannabidiol (CBD), beta-caryophyllene (BC), or their combinations in diabetic peripheral neuropathy (DN). The key factors that contribute to DN include mitochondrial dysfunction, inflammation, and oxidative stress. METHODS Briefly, streptozotocin (STZ) (55 mg/kg) was injected intraperitoneally to induce DN in Sprague-Dawley rats, and we performed procedures involving Randall Sellito calipers, a Von Frey aesthesiometer, a hot plate, and cold plate methods to determine mechanical and thermal hyperalgesia in vivo. The blood flow to the nerves was assessed using a laser Doppler device. Schwann cells were exposed to high glucose (HG) at a dose of 30 mM to induce hyperglycemia and DCFDA, and JC1 and Mitosox staining were performed to determine mitochondrial membrane potential, reactive oxygen species, and mitochondrial superoxides in vitro. The rats were administered BC (30 mg/kg), CBD (15 mg/kg), or combination via i.p. injections, while Schwann cells were treated with 3.65 µM CBD, 75 µM BC, or combination to assess their role in DN amelioration. RESULTS Our results revealed that exposure to BC and CBD diminished HG-induced hyperglycemia in Schwann cells, in part by reducing mitochondrial membrane potential, reactive oxygen species, and mitochondrial superoxides. Furthermore, the BC and CBD combination treatment in vivo could prevent the deterioration of the mitochondrial quality control system by promoting autophagy and mitochondrial biogenesis while improving blood flow. CBD and BC treatments also reduced pain hypersensitivity to hyperalgesia and allodynia, with increased antioxidant and anti-inflammatory action in diabetic rats. These in vivo effects were attributed to significant upregulation of AMPK, sirT3, Nrf2, PINK1, PARKIN, LC3B, Beclin1, and TFAM functions, while downregulation of NLRP3 inflammasome, NFκB, COX2, and p62 activity was noted using Western blotting. CONCLUSIONS the present study demonstrated that STZ and HG-induced oxidative and nitrosative stress play a crucial role in the pathogenesis of diabetic neuropathy. We find, for the first time, that a CBD and BC combination ameliorates DN by modulating the mitochondrial quality control system.
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Affiliation(s)
- Islauddin Khan
- College of Pharmacy and Pharmaceutical Sciences, Florida A&M University, Tallahassee, FL 32307, USA; (I.K.); (S.K.); (B.B.); (M.A.)
| | - Sukhmandeep Kaur
- College of Pharmacy and Pharmaceutical Sciences, Florida A&M University, Tallahassee, FL 32307, USA; (I.K.); (S.K.); (B.B.); (M.A.)
| | - Arun K. Rishi
- John D. Dingell Veterans Affairs Medical Center, Department of Oncology, Wayne State University School of Medicine, Detroit, MI 48201, USA;
| | - Breana Boire
- College of Pharmacy and Pharmaceutical Sciences, Florida A&M University, Tallahassee, FL 32307, USA; (I.K.); (S.K.); (B.B.); (M.A.)
| | - Mounika Aare
- College of Pharmacy and Pharmaceutical Sciences, Florida A&M University, Tallahassee, FL 32307, USA; (I.K.); (S.K.); (B.B.); (M.A.)
| | - Mandip Singh
- College of Pharmacy and Pharmaceutical Sciences, Florida A&M University, Tallahassee, FL 32307, USA; (I.K.); (S.K.); (B.B.); (M.A.)
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Zhang L, Guo K, Tian Q, Ye J, Ding Z, Zhou Q, Li X, Zhou Z, Yang L. Serum Metabolomics Reveals a Potential Benefit of Methionine in Type 1 Diabetes Patients with Poor Glycemic Control and High Glycemic Variability. Nutrients 2023; 15:nu15030518. [PMID: 36771224 PMCID: PMC9921163 DOI: 10.3390/nu15030518] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 01/12/2023] [Accepted: 01/17/2023] [Indexed: 01/21/2023] Open
Abstract
Glycemic variability (GV) in some patients with type 1 diabetes (T1D) remains heterogeneous despite comparable clinical indicators, and whether other factors are involved is yet unknown. Metabolites in the serum indicate a broad effect of GV on cellular metabolism and therefore are more likely to indicate metabolic dysregulation associated with T1D. To compare the metabolomic profiles between high GV (GV-H, coefficient of variation (CV) of glucose ≥ 36%) and low GV (GV-L, CV < 36%) groups and to identify potential GV biomarkers, metabolomics profiling was carried out on serum samples from 17 patients with high GV, 16 matched (for age, sex, body mass index (BMI), diabetes duration, insulin dose, glycated hemoglobin (HbA1c), fasting, and 2 h postprandial C-peptide) patients with low GV (exploratory set), and another 21 (GV-H/GV-L: 11/10) matched patients (validation set). Subsequently, 25 metabolites were significantly enriched in seven Kyoto Encyclopedia of Genes and Genomes (KEGG) pathways between the GV-H and GV-L groups in the exploratory set. Only the differences in spermidine, L-methionine, and trehalose remained significant after validation. The area under the curve of these three metabolites combined in distinguishing GV-H from GV-L was 0.952 and 0.918 in the exploratory and validation sets, respectively. L-methionine was significantly inversely related to HbA1c and glucose CV, while spermidine was significantly positively associated with glucose CV. Differences in trehalose were not as reliable as those in spermidine and L-methionine because of the relatively low amounts of trehalose and the inconsistent fold change sizes in the exploratory and validation sets. Our findings suggest that metabolomic disturbances may impact the GV of T1D. Additional in vitro and in vivo mechanistic studies are required to elucidate the relationship between spermidine and L-methionine levels and GV in T1D patients with different geographical and nutritional backgrounds.
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Affiliation(s)
| | | | | | | | | | | | | | | | - Lin Yang
- Correspondence: ; Tel.: +86-731-8529-2154
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Mai Z, Huang Z, Li Y, Xie Y, Li H, Wang B, Bai W, Lai W, Yu S, Lu H, Han K, Chen X, Shi Y, Chen S, Liu J, Liu Y, Chen J. Elevation of hemoglobin A1c increases the risk of decline in left ventricular systolic function among patients with coronary artery disease. DIABETES & METABOLISM 2023; 49:101411. [PMID: 36400410 DOI: 10.1016/j.diabet.2022.101411] [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: 01/30/2022] [Revised: 11/09/2022] [Accepted: 11/09/2022] [Indexed: 11/17/2022]
Abstract
AIMS The aim of this study was to investigate the association of HbA1c and left ventricular (LV) systolic function among patients with coronary artery disease (CAD). METHODS CAD patients from the Cardiorenal ImprovemeNt II (CIN-II, NCT05050877) registry were included in the study. They were separated into four groups based on HbA1c levels (Q1: HbA1c<5.7%; Q2: 5.7% ≤ HbA1c < 6.1%; Q3: 6.1% ≤ HbA1c < 6.9%; Q4: HbA1c ≥ 6.9%). The endpoint was decline in LV systolic function, defined as an absolute decrease in LV ejection fraction (LVEF) ≥10% from baseline to follow-up with 3-12 months. The association of HbA1c and LVEF was assessed by logistics regression models. RESULTS CAD patients (n = 3,994) (age 62.9 ± 10.6 years; 22.2% female) were included in the final analysis. A decline in LV systolic function was recorded in 429 (11%) patients during follow-up. After fully adjusting for confounders, HbA1c was significantly associated with the high risk of decline in LV systolic function (OR 1.12 [95%CI 1.05-1.20] P = 0.001). By stratifying HbA1c as four groups, there is a significantly increased risk of decline in LV systolic function when HbA1c ≥6.1% (Q2, Q3 and Q4 vs Q1, with OR 1.22 [0.88-1.68] P = 0.235; OR 1.48 [1.07-2.05] P = 0.019; OR 1.60 [1.160-2.22] P = 0.004, respectively). Meanwhile, patients with decline in LV systolic function had a higher risk of cardiovascular death. CONCLUSIONS Elevated HbA1c is a predictor of decline in LV systolic function in CAD patients. Clinicians should be aware of the risk of decline in LV systolic function in CAD patients with elevated HbA1c, and take measures as soon as possible.
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Affiliation(s)
- Ziling Mai
- Department of Cardiology, Guangdong Cardiovascular Institute, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, 510080, China; Department of Guangdong Provincial Key Laboratory of Coronary Heart Disease Prevention, Guangdong Cardiovascular Institute, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, 510080, China; Department of Pharmacy, Guangdong Second Provincial General Hospital, Guangdong Provincial Emergency Hospital, Guangzhou, 510317, China
| | - Zhidong Huang
- Department of Cardiology, Guangdong Cardiovascular Institute, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, 510080, China; Department of Guangdong Provincial Key Laboratory of Coronary Heart Disease Prevention, Guangdong Cardiovascular Institute, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, 510080, China
| | - Yuqi Li
- Department of Cardiology, Zhongshan People's Hospital, Zhongshan, 528402, China
| | - Yun Xie
- Department of Cardiology, Guangdong Cardiovascular Institute, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, 510080, China; Department of Guangdong Provincial Key Laboratory of Coronary Heart Disease Prevention, Guangdong Cardiovascular Institute, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, 510080, China
| | - Huanqiang Li
- Department of Cardiology, Guangdong Cardiovascular Institute, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, 510080, China; Department of Guangdong Provincial Key Laboratory of Coronary Heart Disease Prevention, Guangdong Cardiovascular Institute, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, 510080, China
| | - Bo Wang
- Department of Cardiology, Guangdong Cardiovascular Institute, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, 510080, China; Department of Guangdong Provincial Key Laboratory of Coronary Heart Disease Prevention, Guangdong Cardiovascular Institute, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, 510080, China
| | - Wei Bai
- School of Mathematics and Statistics, School of Medicine, Guangdong University of Finance & Economics, Guangzhou, 510320, China
| | - Wenguang Lai
- Department of Cardiology, Guangdong Cardiovascular Institute, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, 510080, China; Department of Guangdong Provincial Key Laboratory of Coronary Heart Disease Prevention, Guangdong Cardiovascular Institute, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, 510080, China
| | - Sijia Yu
- Department of Cardiology, Guangdong Cardiovascular Institute, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, 510080, China; Department of Guangdong Provincial Key Laboratory of Coronary Heart Disease Prevention, Guangdong Cardiovascular Institute, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, 510080, China
| | - Hongyu Lu
- Department of Cardiology, Guangdong Cardiovascular Institute, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, 510080, China; Department of Guangdong Provincial Key Laboratory of Coronary Heart Disease Prevention, Guangdong Cardiovascular Institute, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, 510080, China
| | - Kedong Han
- Department of Cardiology, Maoming People's Hospital, Maoming 525000, China
| | - Xuewen Chen
- Department of Cardiology, Maoming People's Hospital, Maoming 525000, China
| | - Yingming Shi
- Department of Cardiology, Maoming People's Hospital, Maoming 525000, China
| | - Shiqun Chen
- Department of Cardiology, Guangdong Cardiovascular Institute, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, 510080, China; Department of Guangdong Provincial Key Laboratory of Coronary Heart Disease Prevention, Guangdong Cardiovascular Institute, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, 510080, China
| | - Jin Liu
- Department of Cardiology, Guangdong Cardiovascular Institute, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, 510080, China; Department of Guangdong Provincial Key Laboratory of Coronary Heart Disease Prevention, Guangdong Cardiovascular Institute, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, 510080, China.
| | - Yong Liu
- Department of Cardiology, Guangdong Cardiovascular Institute, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, 510080, China; Department of Guangdong Provincial Key Laboratory of Coronary Heart Disease Prevention, Guangdong Cardiovascular Institute, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, 510080, China.
| | - Jiyan Chen
- Department of Cardiology, Guangdong Cardiovascular Institute, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, 510080, China; Department of Guangdong Provincial Key Laboratory of Coronary Heart Disease Prevention, Guangdong Cardiovascular Institute, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, 510080, China.
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Perspectives of glycemic variability in diabetic neuropathy: a comprehensive review. Commun Biol 2021; 4:1366. [PMID: 34876671 PMCID: PMC8651799 DOI: 10.1038/s42003-021-02896-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2021] [Accepted: 11/16/2021] [Indexed: 12/14/2022] Open
Abstract
Diabetic neuropathy is one of the most prevalent chronic complications of diabetes, and up to half of diabetic patients will develop diabetic neuropathy during their disease course. Notably, emerging evidence suggests that glycemic variability is associated with the pathogenesis of diabetic complications and has emerged as a possible independent risk factor for diabetic neuropathy. In this review, we describe the commonly used metrics for evaluating glycemic variability in clinical practice and summarize the role and related mechanisms of glycemic variability in diabetic neuropathy, including cardiovascular autonomic neuropathy, diabetic peripheral neuropathy and cognitive impairment. In addition, we also address the potential pharmacological and non-pharmacological treatment methods for diabetic neuropathy, aiming to provide ideas for the treatment of diabetic neuropathy. Zhang et al. describe metrics for evaluating glycaemic variability (GV) in clinical practice and summarize the role and related mechanisms of GV in diabetic neuropathy, including cardiovascular autonomic neuropathy, diabetic peripheral neuropathy and cognitive impairment. They aim to stimulate ideas for the treatment of diabetic neuropathy.
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TSH Combined with TSHR Aggravates Diabetic Peripheral Neuropathy by Promoting Oxidative Stress and Apoptosis in Schwann Cells. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2021; 2021:2482453. [PMID: 34804362 PMCID: PMC8601831 DOI: 10.1155/2021/2482453] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/18/2021] [Revised: 09/29/2021] [Accepted: 10/19/2021] [Indexed: 11/17/2022]
Abstract
Subclinical hypothyroidism (SCH) is associated with diabetic peripheral neuropathy (DPN); however, the mechanism underlying this association remains unknown. This study is aimed at examining neurofunctional and histopathological alterations in a type 2 diabetes (T2DM) mouse model of SCH and investigating the impact of thyroid-stimulating hormone (TSH) in an in vitro DPN cell model established using RSC96 cells under high glucose (HG) and palmitic acid (PA) stimulation. Our results indicated that T2DM, in combination with SCH, aggravated abnormal glucose and lipid metabolism in T2DM and dramatically destroyed the peripheral nervous system by increasing paw withdrawal latency, decreasing motor nerve conduction velocity, and exacerbating ultrastructural deterioration of the damaged sciatic nerve caused by diabetes. Furthermore, the results of our in vitro experiments showed that TSH intensified HG/PA-induced RSC96 cell damage by inducing oxidative stress, mitochondrial dysfunction, and apoptosis. More importantly, TSHR knockout or inhibition of PA-induced TSHR palmitoylation could alleviate the apoptosis induced by TSH. Overall, in this study, the novel mechanisms by which TSH, as an independent risk factor for DPN progression, aggravating Schwann cell apoptosis and demyelination, are elucidated. These findings indicate that TSHR could be a potential target for both the prevention and treatment of DPN and, possibly, other microvascular diseases, and have implication in the clinical management of patients with DPN.
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Klimontov VV, Saik OV, Korbut AI. Glucose Variability: How Does It Work? Int J Mol Sci 2021; 22:ijms22157783. [PMID: 34360550 PMCID: PMC8346105 DOI: 10.3390/ijms22157783] [Citation(s) in RCA: 41] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2021] [Revised: 07/16/2021] [Accepted: 07/17/2021] [Indexed: 02/07/2023] Open
Abstract
A growing body of evidence points to the role of glucose variability (GV) in the development of the microvascular and macrovascular complications of diabetes. In this review, we summarize data on GV-induced biochemical, cellular and molecular events involved in the pathogenesis of diabetic complications. Current data indicate that the deteriorating effect of GV on target organs can be realized through oxidative stress, glycation, chronic low-grade inflammation, endothelial dysfunction, platelet activation, impaired angiogenesis and renal fibrosis. The effects of GV on oxidative stress, inflammation, endothelial dysfunction and hypercoagulability could be aggravated by hypoglycemia, associated with high GV. Oscillating hyperglycemia contributes to beta cell dysfunction, which leads to a further increase in GV and completes the vicious circle. In cells, the GV-induced cytotoxic effect includes mitochondrial dysfunction, endoplasmic reticulum stress and disturbances in autophagic flux, which are accompanied by reduced viability, activation of apoptosis and abnormalities in cell proliferation. These effects are realized through the up- and down-regulation of a large number of genes and the activity of signaling pathways such as PI3K/Akt, NF-κB, MAPK (ERK), JNK and TGF-β/Smad. Epigenetic modifications mediate the postponed effects of glucose fluctuations. The multiple deteriorative effects of GV provide further support for considering it as a therapeutic target in diabetes.
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Affiliation(s)
- Vadim V. Klimontov
- Laboratory of Endocrinology, Research Institute of Clinical and Experimental Lymphology—Branch of the Institute of Cytology and Genetics, Siberian Branch of Russian Academy of Sciences (RICEL—Branch of IC&G SB RAS), 630060 Novosibirsk, Russia; (O.V.S.); (A.I.K.)
- Correspondence:
| | - Olga V. Saik
- Laboratory of Endocrinology, Research Institute of Clinical and Experimental Lymphology—Branch of the Institute of Cytology and Genetics, Siberian Branch of Russian Academy of Sciences (RICEL—Branch of IC&G SB RAS), 630060 Novosibirsk, Russia; (O.V.S.); (A.I.K.)
- Laboratory of Computer Proteomics, Federal Research Center Institute of Cytology and Genetics, Siberian Branch of the Russian Academy of Sciences (IC&G SB RAS), 630090 Novosibirsk, Russia
| | - Anton I. Korbut
- Laboratory of Endocrinology, Research Institute of Clinical and Experimental Lymphology—Branch of the Institute of Cytology and Genetics, Siberian Branch of Russian Academy of Sciences (RICEL—Branch of IC&G SB RAS), 630060 Novosibirsk, Russia; (O.V.S.); (A.I.K.)
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Wang X, Huan Y, Li C, Cao H, Sun S, Lei L, Liu Q, Liu S, Ji W, Liu H, Huang K, Zhou J, Shen Z. Diphenyl diselenide alleviates diabetic peripheral neuropathy in rats with streptozotocin-induced diabetes by modulating oxidative stress. Biochem Pharmacol 2020; 182:114221. [DOI: 10.1016/j.bcp.2020.114221] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2020] [Revised: 09/13/2020] [Accepted: 09/14/2020] [Indexed: 12/15/2022]
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Li S, Tang X, Luo Y, Wu B, Huang Z, Li Z, Peng L, Ling Y, Zhu J, Zhong J, Liu J, Chen Y. Impact of long-term glucose variability on coronary atherosclerosis progression in patients with type 2 diabetes: a 2.3 year follow-up study. Cardiovasc Diabetol 2020; 19:146. [PMID: 32977802 PMCID: PMC7517679 DOI: 10.1186/s12933-020-01126-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Accepted: 09/12/2020] [Indexed: 02/06/2023] Open
Abstract
Background Glycemic variability (GV) confers a risk of cardiovascular events. In this study, we aimed to investigate whether long-term GV has an impact on coronary atherosclerosis progression in patients with type 2 diabetes mellitus (T2DM). Methods A total of 396 patients with T2DM who had coronary computed tomography angiography and laboratory data available at baseline and for follow-up evaluations [median 2.3 (1.8–3.1) years] were included. Fasting plasma glucose (FPG) was measured every 1–3 months, and HbA1c was measured quarterly. The coefficient of variation (CV) of HbA1c and FPG were calculated as measures of GV. Quantitative assessment of coronary plaques was performed by measuring the annual change and progression rate of total plaque volume (TPV). Significant progression was defined as annual TPV progression ≥ 15%. Multivariable regression analyses were used to assess the effects of GV on atherosclerosis progression. Results In the 396 patients, the annual change in TPV was 12.35 ± 14.23 mm3, and annual progression rate was 13.36 ± 12.69%. There were 143 (36.11%) patients with significant progression, and they had a significantly higher CV-HbA1c (P < 0.001) and CV-FPG (P < 0.001) than those without significant progression. In multivariable regression analyses, both CV-HbA1c and CV-FPG were independent predictors of annual change in TPV [CV-HbA1c: β = 0.241 (0.019–0.462), P = 0.034; CV-FPG: β = 0.265 (0.060–0.465), P = 0.012], annual TPV progression [CV-HbA1c: β = 0.214 (0.023–0.405), P = 0.029; CV-FPG: β = 0.218 (0.037–0.399), P = 0.019], and significant atherosclerosis progression [CV-HbA1c: odds ratio [OR] = 1.367 (1.149–1.650), P = 0.010; CV-FPG: OR = 1.321 (1.127–1.634), P = 0.013]. Conclusions Long-term GV is associated with accelerated progression of coronary atherosclerosis independent of conventional risk factors in patients with T2DM. Trial registration ClinicalTrials.gov (NCT02587741), October 27, 2015; retrospectively registered
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Affiliation(s)
- Suhua Li
- Department of Cardiovascular Medicine, The Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou, 510630, China
| | - Xixiang Tang
- Department of Endocrinology & Metabolism, Guangdong Provincial Key Laboratory of Diabetology, The Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou, 510630, China.,VIP Medical Service Center, The Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou, 510630, China
| | - Yanting Luo
- Department of Cardiovascular Medicine, The Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou, 510630, China
| | - Bingyuan Wu
- Department of Cardiovascular Medicine, The Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou, 510630, China
| | - Zhuoshan Huang
- Department of Cardiovascular Medicine, The Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou, 510630, China
| | - Zexiong Li
- Department of Cardiovascular Medicine, The Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou, 510630, China
| | - Long Peng
- Department of Cardiovascular Medicine, The Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou, 510630, China
| | - Yesheng Ling
- Department of Cardiovascular Medicine, The Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou, 510630, China
| | - Jieming Zhu
- Department of Cardiovascular Medicine, The Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou, 510630, China
| | - Junlin Zhong
- Department of Ultrasonography, The Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou, 510630, China.
| | - Jinlai Liu
- Department of Cardiovascular Medicine, The Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou, 510630, China.
| | - Yanming Chen
- Department of Endocrinology & Metabolism, Guangdong Provincial Key Laboratory of Diabetology, The Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou, 510630, China.
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Yang CD, Shen Y, Ding FH, Yang ZK, Hu J, Shen WF, Zhang RY, Lu L, Wang XQ. Visit-to-visit fasting plasma glucose variability is associated with left ventricular adverse remodeling in diabetic patients with STEMI. Cardiovasc Diabetol 2020; 19:131. [PMID: 32878604 PMCID: PMC7469406 DOI: 10.1186/s12933-020-01112-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Accepted: 08/29/2020] [Indexed: 12/17/2022] Open
Abstract
Background Patients with type 2 diabetes mellitus (T2DM) are predisposed to poor cardiovascular outcomes after ST-segment elevation myocardial infarction (STEMI). Left ventricular adverse remodeling (LVAR) triggered upon myocardial infarction is recognized as the predominant pathological process in the development of heart failure. In the present study, we sought to investigate whether visit-to-visit fasting plasma glucose (FPG) variability is a potential predictor of LVAR in T2DM patients after STEMI. Methods From January 2014 to December 2018 in Ruijin Hospital, T2DM patients with STEMI who underwent primary percutaneous coronary intervention were consecutively enrolled and followed up for ~ 12 months. The changes in left ventricular geometric and functional parameters between baseline and 12-month follow-up were assessed by echocardiography. The incidence of LVAR, defined as 20% increase in indexed left ventricular end-diastolic volume (LVEDV), and its relationship with visit-to-visit FPG variability were analyzed. Multivariate regression models were constructed to test the predictive value of FPG variability for post-infarction LVAR. Results A total of 437 patients with type 2 diabetes and STEMI were included in the final analysis. During a mean follow-up of 12.4 ± 1.1 months, the incidence of LVAR was 20.6% and mean enlargement of indexed LVEDV was 3.31 ± 14.4 mL/m2, which was significantly increased in patients with higher coefficient variance (CV) of FPG (P = 0.002) irrespective of baseline glycemic levels. In multivariate analysis, FPG variability was independently associated with incidence of post-infarction LVAR after adjustment for traditional risk factors, baseline HbA1c as well as mean FPG during follow-up (OR: 3.021 [95% CI 1.081–8.764] for highest vs. lowest tertile of CV of FPG). Assessing FPG variability by other two measures, including standard deviation (SD) and variability independent of the mean (VIM), yielded similar findings. Conclusions This study suggests that visit-to-visit FPG variability is an independent predictor of incidence of LVAR in T2DM patients with STEMI. Trial registration Trials number, NCT02089360; registered on March 17,2014.
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Affiliation(s)
- Chen Die Yang
- Department of Cardiology, Ruijin Hospital, Shanghai Jiao-Tong University School of Medicine, 197 Ruijin Road II, Shanghai, 200025, People's Republic of China
| | - Ying Shen
- Department of Cardiology, Ruijin Hospital, Shanghai Jiao-Tong University School of Medicine, 197 Ruijin Road II, Shanghai, 200025, People's Republic of China
| | - Feng Hua Ding
- Department of Cardiology, Ruijin Hospital, Shanghai Jiao-Tong University School of Medicine, 197 Ruijin Road II, Shanghai, 200025, People's Republic of China
| | - Zhen Kun Yang
- Department of Cardiology, Ruijin Hospital, Shanghai Jiao-Tong University School of Medicine, 197 Ruijin Road II, Shanghai, 200025, People's Republic of China
| | - Jian Hu
- Department of Cardiology, Ruijin Hospital, Shanghai Jiao-Tong University School of Medicine, 197 Ruijin Road II, Shanghai, 200025, People's Republic of China
| | - Wei Feng Shen
- Department of Cardiology, Ruijin Hospital, Shanghai Jiao-Tong University School of Medicine, 197 Ruijin Road II, Shanghai, 200025, People's Republic of China.,Institute of Cardiovascular Disease, Shanghai Jiao-Tong University School of Medicine, Shanghai, People's Republic of China
| | - Rui Yan Zhang
- Department of Cardiology, Ruijin Hospital, Shanghai Jiao-Tong University School of Medicine, 197 Ruijin Road II, Shanghai, 200025, People's Republic of China.
| | - Lin Lu
- Department of Cardiology, Ruijin Hospital, Shanghai Jiao-Tong University School of Medicine, 197 Ruijin Road II, Shanghai, 200025, People's Republic of China. .,Institute of Cardiovascular Disease, Shanghai Jiao-Tong University School of Medicine, Shanghai, People's Republic of China.
| | - Xiao Qun Wang
- Department of Cardiology, Ruijin Hospital, Shanghai Jiao-Tong University School of Medicine, 197 Ruijin Road II, Shanghai, 200025, People's Republic of China. .,Institute of Cardiovascular Disease, Shanghai Jiao-Tong University School of Medicine, Shanghai, People's Republic of China.
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Said RS, Mohamed HA, Kassem DH. Alpha-lipoic acid effectively attenuates ionizing radiation-mediated testicular dysfunction in rats: Crosstalk of NF-ĸB, TGF-β, and PPAR-ϒ pathways. Toxicology 2020; 442:152536. [PMID: 32649955 DOI: 10.1016/j.tox.2020.152536] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2020] [Revised: 06/26/2020] [Accepted: 07/06/2020] [Indexed: 12/21/2022]
Abstract
Radiotherapy is one of the principal approaches employed in the treatment of pelvic cancers. Nevertheless, testicular dysfunction and infertility are among the most common adverse effects in young adult cancer survivors. Clinically, alpha-lipoic acid (LA) has been applied to improve the quality of sperm with a satisfactory effect. Therefore, the present study investigated the underlying mechanisms of the radioprotective effects of LA against testicular damage. Male Sprague-Dawley rats were exposed to 10 Gy of whole-body ϒ-radiation and LA (50 mg/kg, P.O.) was administered one week before and three days post-irradiation. LA showed remarkable capacity in preserving testicular tissue against radiation damage by improving histological and ultrastructural changes of disorganized seminiferous tubules, besides enhancing its diameter, germinal epithelial thickness, and Johnsen's score. Radiation instigated a significant decrease in sperm quality and quantity associated with depletion of serum testosterone levels, while the LA administration maintained spermatogenesis. Strikingly, LA exhibited antioxidant properties by restoring reduced glutathione levels and antioxidant enzyme activities such as catalase and glutathione-s-transferase, besides diminishing malondialdehyde levels in the testis of irradiated group. Furthermore, LA alleviated testicular inflammation through downregulation of nuclear factor-ĸB (NF-ĸB) expression with a subsequent reduction in interleukin (IL)-6 and cyclooxygenase-2 expression, accompanied by the augmented expression of the anti-inflammatory cytokine IL-10. Additionally, testicular fibrosis markers including Masson's trichrome and transforming growth factor (TGF)-β expression were noticeably declined in LA-treated irradiated rats, together with the upregulation of peroxisome proliferator-activated receptor-ϒ expression. Collectively, LA ameliorates radiation-mediated spermatogenesis-defects and testicular-damage via suppression of oxidative stress/NF-ĸB/TGF-β signaling.
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Affiliation(s)
- Riham Soliman Said
- Department of Drug Radiation Research, National Center for Radiation Research and Technology, Atomic Energy Authority, Cairo, Egypt.
| | - Heba A Mohamed
- Department of Drug Radiation Research, National Center for Radiation Research and Technology, Atomic Energy Authority, Cairo, Egypt
| | - Dina Hamada Kassem
- Department of Biochemistry, Faculty of Pharmacy, Ain Shams University, Cairo, Egypt
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11
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Oltipraz Prevents High Glucose-Induced Oxidative Stress and Apoptosis in RSC96 Cells through the Nrf2/NQO1 Signalling Pathway. BIOMED RESEARCH INTERNATIONAL 2020; 2020:5939815. [PMID: 32685505 PMCID: PMC7333049 DOI: 10.1155/2020/5939815] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/12/2020] [Accepted: 06/06/2020] [Indexed: 12/17/2022]
Abstract
Diabetic peripheral neuropathy (DPN) is a common complication of diabetes mellitus (DM). Schwann cell (SC) apoptosis contributes to the occurrence and development of DPN. Effective drugs to prevent SC apoptosis are required to relieve and reverse peripheral nerve injury caused by DM. Oltipraz [4-methyl-5-(2-pyrazinyl)-1,2-dithiole-3-thione], an agonist of nuclear factor erythroid derived-2-related factor 2 (Nrf2), exerts strong effect against oxidative stress in animal models or clinical patients in certain diseases, including heart failure, acute kidney injury, and liver injury. The aim of the present study was to determine the effectiveness of oltipraz in preventing SC apoptosis induced by high glucose levels. RSC96 cells pretreated with oltipraz were cultured in high-glucose medium (50 mM glucose) for 24 h, and cells cultured in medium containing 5 mM glucose were used as the control. Flow cytometry was used to evaluate the degree of apoptosis. A Cell Counting Kit-8 assay was used to assess cell viability. The mitochondrial membrane potential was assessed using JC-1 staining, and reactive oxygen species (ROS) generation was measured using 20,70-dichlorodihydrofluorescein diacetate staining. In addition, the levels of malondialdehyde (MDA) and superoxide dismutase (SOD) levels were also evaluated using the corresponding kits. Flow cytometry was subsequently used to detect apoptosis, and western blotting was used to measure the expression levels of nuclear factor erythroid derived-2-related factor 2 and NADPH quinone oxidoreductase 1. The results showed that high glucose concentration increased oxidative stress and apoptosis in RSC96 cells. Oltipraz improved cell viability and reduced apoptosis of RSC96 cells in the high glucose environment. Additionally, oltipraz exhibited a significant antioxidative effect, as shown by the decrease in MDA levels, increased SOD levels, and reduced ROS generation in RSC96 cells. The results of the present study suggest that oltipraz exhibits potential as an effective drug for treatment with DPN.
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Liu YP, Shao SJ, Guo HD. Schwann cells apoptosis is induced by high glucose in diabetic peripheral neuropathy. Life Sci 2020; 248:117459. [PMID: 32092332 DOI: 10.1016/j.lfs.2020.117459] [Citation(s) in RCA: 52] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2019] [Revised: 02/14/2020] [Accepted: 02/20/2020] [Indexed: 02/06/2023]
Abstract
Diabetic peripheral neuropathy (DPN) is a common complication of diabetes mellitus that affects approximately half of patients with diabetes. Current treatment regimens cannot treat DPN effectively. Schwann cells (SCs) are very sensitive to glucose concentration and insulin, and closely associated with the occurrence and development of type 1 diabetic mellitus (T1DM) and DPN. Apoptosis of SCs is induced by hyperglycemia and is involved in the pathogenesis of DPN. This review considers the pathological processes of SCs apoptosis under high glucose, which include the following: oxidative stress, inflammatory reactions, endoplasmic reticulum stress, autophagy, nitrification and signaling pathways (PI3K/AKT, ERK, PERK/Nrf2, and Wnt/β-catenin). The clarification of mechanisms underlying SCs apoptosis induced by high glucose will help us to understand and identify more effective strategies for the treatment of T1DM DPN.
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Affiliation(s)
- Yu-Pu Liu
- Department of Anatomy, School of Basic Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China
| | - Shui-Jin Shao
- Department of Anatomy, School of Basic Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China.
| | - Hai-Dong Guo
- Department of Anatomy, School of Basic Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China.
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Li S, Zheng Z, Tang X, Zhong J, Liu X, Zhao Y, Chen L, Zhu J, Liu J, Chen Y. Impact of HbA1c variability on subclinical left ventricular remodeling and dysfunction in patients with type 2 diabetes mellitus. Clin Chim Acta 2019; 502:159-166. [PMID: 31866332 DOI: 10.1016/j.cca.2019.12.006] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2019] [Revised: 11/25/2019] [Accepted: 12/06/2019] [Indexed: 12/17/2022]
Abstract
BACKGROUND Glycemic instability confers a risk of poor prognosis in patients with type 2 diabetes mellitus (T2DM). This study aimed to investigate whether HbA1c variability provided additional value over mean HbA1c for predicting subclinical left ventricular remodeling and dysfunction in T2DM patients. METHODS A total of 466 T2DM patients with normal cardiac structure and function were recruited and prospectively followed up for a median of 4.7 y. HbA1c was measured quarterly. The intrapersonal mean and standard deviation (SD) of HbA1c measurements were calculated, and SD-HbA1c was considered as a measure of HbA1c variability. All participants underwent transthoracic echocardiography at baseline and after follow-up. RESULTS In multivariable regression analyses, SD-HbA1c was independently associated with annualized changes in left ventricular end diastolic diameter, interventricular septum, left ventricular posterior wall, left ventricular mass index, left ventricular ejection fraction, E/e' ratio, and E/A ratio (P < 0.001). Subgroup analysis based on mean HbA1c levels (<7.0%, 7.0-7.5%, and ≥7.5%) further confirmed that SD-HbA1c was associated with most of the above parameters regardless of mean HbA1c levels. CONCLUSION This study indicates that HbA1c variability adds to the mean value in predicting subclinical left ventricular remodeling and dysfunction in T2DM patients.
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Affiliation(s)
- Suhua Li
- Department of Cardiology, the Third Affiliated Hospital, Sun Yat-sen University, Guangzhou 510630, China
| | - Zhenda Zheng
- Department of Cardiology, the Third Affiliated Hospital, Sun Yat-sen University, Guangzhou 510630, China
| | - Xixiang Tang
- Department of Endocrinology, the Third Affiliated Hospital, Sun Yat-sen University, Guangzhou 510630, China; Advanced Medical Center, the Third Affiliated Hospital, Sun Yat-sen University, Guangzhou 510630, China
| | - Junlin Zhong
- Department of Ultrasonography, the Third Affiliated Hospital, Sun Yat-sen University, Guangzhou 510630, China
| | - Xing Liu
- Department of Cardiology, the Third Affiliated Hospital, Sun Yat-sen University, Guangzhou 510630, China
| | - Yunyue Zhao
- Department of Cardiology, the Third Affiliated Hospital, Sun Yat-sen University, Guangzhou 510630, China
| | - Lin Chen
- Department of Cardiology, the Third Affiliated Hospital, Sun Yat-sen University, Guangzhou 510630, China
| | - Jieming Zhu
- Department of Cardiology, the Third Affiliated Hospital, Sun Yat-sen University, Guangzhou 510630, China.
| | - Jinlai Liu
- Department of Cardiology, the Third Affiliated Hospital, Sun Yat-sen University, Guangzhou 510630, China.
| | - Yanming Chen
- Department of Endocrinology, the Third Affiliated Hospital, Sun Yat-sen University, Guangzhou 510630, China.
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14
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Picconi F, Parravano M, Sciarretta F, Fulci C, Nali M, Frontoni S, Varano M, Caccuri AM. Activation of retinal Müller cells in response to glucose variability. Endocrine 2019; 65:542-549. [PMID: 31327157 DOI: 10.1007/s12020-019-02017-5] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/03/2019] [Accepted: 07/11/2019] [Indexed: 12/11/2022]
Abstract
PURPOSE In the earliest stages of diabetic retinopathy (DR), a dysfunction of Müller cells, characterized by high levels of glial fibrillary acidic protein (GFAP), and aquaporins (AQP), has been observed. Although chronic hyperglycemia causes the activation of Müller cells, the effect of glycemic fluctuations is yet unknown. The aim of the study was to analyze the impact of glucose variability on rat retinal Müller cells (rMC-1) adapted to either normal (5 mM) or high (25 mM) glucose levels. METHODS rMC-1 were cultured in a medium containing either 5 mM (N cells) or 25 mM of glucose (H cells) and then incubated for 96 h in a medium containing (a) low glucose (either 1-3 or 5 mM), (b) basal glucose (either 5 or 25 mM), (c) high glucose (either 25 or 45 mM), (d) basal and high glucose alternated every 24 h; (e) low- and high glucose alternated every 24 h; (f) basal glucose with episodes of low glucose for 30 min twice a day. Müller cells activation was evaluated by measuring the levels of GFAP, AQP4, and phospho-active extracellular signal-regulated kinase (pERK). RESULTS Under both basal and high glucose concentrations rMC-1 were viable, but their response to glucose excursions was different. In N cells kept under normal (5 mM) glucose, a significant glial activation was measured not only in response to constant high glucose but also to alternating low/high glucose. In H cells, adapted to 25 mM glucose, a significant response was observed only after exposition to a lower (5 mM) glucose concentration. CONCLUSION Our results highlight Müller cells activation in response to glucose variability and a different susceptibility depending on the basal glucose conditions.
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Affiliation(s)
- Fabiana Picconi
- Department of Systems Medicine, University of Rome Tor Vergata, Rome, Italy
- Unit of Endocrinology, Diabetes and Metabolism, S. Giovanni Calibita Fatebenefratelli Hospital, Rome, Italy
| | | | - Francesca Sciarretta
- Department of Experimental Medicine, University of Rome Tor Vergata, Rome, Italy
| | - Chiara Fulci
- Department of Experimental Medicine, University of Rome Tor Vergata, Rome, Italy
| | - Michela Nali
- Department of Experimental Medicine, University of Rome Tor Vergata, Rome, Italy
| | - Simona Frontoni
- Department of Systems Medicine, University of Rome Tor Vergata, Rome, Italy.
- Unit of Endocrinology, Diabetes and Metabolism, S. Giovanni Calibita Fatebenefratelli Hospital, Rome, Italy.
| | | | - Anna Maria Caccuri
- Department of Experimental Medicine, University of Rome Tor Vergata, Rome, Italy
- Center Nanoscience, Nanotechnology, Innovative Instrumentation (NAST), University of Rome Tor Vergata, Rome, Italy
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15
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Yang J, Zhao Z, Yuan H, Ma X, Li Y, Wang H, Ma X, Qin G. The mechanisms of glycemic variability accelerate diabetic central neuropathy and diabetic peripheral neuropathy in diabetic rats. Biochem Biophys Res Commun 2019; 510:35-41. [PMID: 30660367 DOI: 10.1016/j.bbrc.2018.12.179] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2018] [Accepted: 12/28/2018] [Indexed: 12/16/2022]
Abstract
The effect of glycemic variability (GV) on diabetic neuropathy, including diabetic central neuropathy and diabetic peripheral neuropathy (DPN), and the involved mechanism are not fully understood. In this study, a fluctuant hyperglycemia rat model was induced by alternate intraperitoneal injections of glucose and insulin. To assess diabetic central neuropathy, step-down type passive avoidance tests were conducted, and the expression levels of p-Tau, T-Tau, p-GSK3β, GSK3β, p-Akt, and Akt in the hippocampus were measured. To assess DPN, the motor nerve conduction velocity (MNCV) was measured, and the microstructure of the sciatic nerve was observed. Additionally, the expression levels of oxidative stress and inflammation indicators were detected in the sciatic nerve. We observed that both learning and memory abilities were disrupted by GV. GV promoted Tau phosphorylation and inhibited the Akt/GSK3β pathway in the hippocampus. Additionally, GV weakened the MNCV of the sciatic nerve, and the structures of both the myelin sheath and the axons in the sciatic nerve were disrupted. GV also significantly reduced the expression of superoxide dismutase (SOD) and increased the expression levels of malondialdehyde (MDA), of proinflammatory cytokines (TNF-α and IL-6) and of NF-κB. In conclusion, the present study highlighted that GV might induce diabetic central neuropathy through the hyperphosphorylation of Tau in the hippocampus by inhibiting the Akt/GSK3β pathway and that it may cause DPN through oxidative stress and inflammatory responses by activating the NF-κB pathway.
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Affiliation(s)
- Junpeng Yang
- Department of Endocrinology of the Frist Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, 450052, PR China; Department of Endocrinology of Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, Zhengzhou, Henan, 450003, PR China
| | - Zhigang Zhao
- Department of Endocrinology of Zhengzhou Yihe Hospital Affiliated to Henan University, Zhengzhou, Henan, 450003, PR China
| | - Huijuan Yuan
- Department of Endocrinology of Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, Zhengzhou, Henan, 450003, PR China
| | - Xiangxiang Ma
- Department of Endocrinology of Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, Zhengzhou, Henan, 450003, PR China
| | - Yakun Li
- Department of Endocrinology of Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, Zhengzhou, Henan, 450003, PR China
| | - Huimeng Wang
- Department of Endocrinology of Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, Zhengzhou, Henan, 450003, PR China
| | - Xiaojun Ma
- Department of Endocrinology of the Frist Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, 450052, PR China
| | - Guijun Qin
- Department of Endocrinology of the Frist Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, 450052, PR China.
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16
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Sadeghiyan Galeshkalami N, Abdollahi M, Najafi R, Baeeri M, Jamshidzade A, Falak R, Davoodzadeh Gholami M, Hassanzadeh G, Mokhtari T, Hassani S, Rahimifard M, Hosseini A. Alpha-lipoic acid and coenzyme Q10 combination ameliorates experimental diabetic neuropathy by modulating oxidative stress and apoptosis. Life Sci 2019; 216:101-110. [DOI: 10.1016/j.lfs.2018.10.055] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2018] [Revised: 10/24/2018] [Accepted: 10/25/2018] [Indexed: 01/25/2023]
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17
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Tasci I, Demir CF, Kuloglu T. Effects of Alpha Lipoic Acid on Loss of Myelin Sheath of Sciatic Nerve in Experimentally Induced Diabetic Rats. Med Arch 2018; 72:178-181. [PMID: 30061762 PMCID: PMC6021160 DOI: 10.5455/medarh.2018.72.178-181] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Objectives: Diabetic neuropathy is the most frequent chronic complication of diabetes. It may attack to sensory, motor or autonomous fibers. Varied mechanisms account for the development of diabetic neuropathy such as metabolic disorders, microvascular damages, neurotrophic support deficit, alternation in neuro-immune interactions, neural and glial cell apoptosis, and inflammation. Alpha lipoic acid (ALA) is a potent lipophilic antioxidant in vitro and in vivo conditions, which plays a main role as cofactor in many mitochondrial reactions, easily absorbed from gastointestinal tract and can easily cross the blood brain barrier (BBB). Apoptosis is an important mechanism of degenerative diseases, which is induced by some factors like hyperglycemia toxicity. In vivo and in vitro studies showed that hyperglycemia affected the cell survival and induced apoptotic changes in dorsal root ganglion neurons and Schwann cells. Methods: In this experiment we used a total of 28 rats. 14 rats were given 180mg/kg streptozotocin (STZ) dissolved by single intraperitoneally (i.p.) injection. Rats are divided into 4 groups; Control (group I), DM (group II), ALA (group III) and DM+ALA (group IV). Myelin sheaths of sciatic nerves were examined histologically for each group. Results: In the results of the histological examination, showed that loss of myelin sheath in sciatic nerves of rats while the group treated with ALA showed less myelin loss. Conclusion: This study might be suggested that ALA has a protective effect on peripheral neuronal cell damage generated with DM.
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Affiliation(s)
- Irem Tasci
- Department of Neurology, Malatya Education and Research Hospital, Malatya, Turkey
| | - Caner Feyzi Demir
- Firat University, School of Medicine, Department of Neurology. Malatya, Turkey
| | - Tuncay Kuloglu
- Firat University, School of Medicine, Department of Histology, Malatya, Turekey
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18
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Huang CT, Chen SH, Lin SC, Chen WT, Lue JH, Tsai YJ. Erythropoietin reduces nerve demyelination, neuropathic pain behavior and microglial MAPKs activation through erythropoietin receptors on Schwann cells in a rat model of peripheral neuropathy. Glia 2018; 66:2299-2315. [PMID: 30417431 DOI: 10.1002/glia.23461] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2017] [Revised: 04/15/2018] [Accepted: 05/08/2018] [Indexed: 12/21/2022]
Abstract
Neuroprotective effects of erythropoietin (EPO) on peripheral nerve injury remain uncertain. This study investigated the efficacy of EPO in attenuating median nerve chronic constriction injury (CCI)-induced neuropathy. Animals received an intraneural injection of EPO at doses of 1,000, 3,000, or 5,000 units/kg 15 min before median nerve CCI. Afterwards, the behavioral and electrophysiological tests were conducted. Immunohistochemistry and immunoblotting were used for qualitative and quantitative analysis of microglial and mitogen-activated protein kinases (MAPKs), including p38, JNK, and ERK, activation. Enzyme-linked immunosorbent assay and microdialysis were applied to measure pro-inflammatory cytokine and glutamate responses, respectively. EPO pre-treatment dose-dependently ameliorated neuropathic pain behavior, decreased microglial and MAPKs activation, and diminished the release of pro-inflammatory cytokines and glutamate in the ipsilateral cuneate nucleus after CCI. Moreover, EPO pre-treatment preserved myelination of the injured median nerve on morphological investigation and suppressed injury-induced discharges. We also observed that EPO receptor (EPOR) expression was up-regulated in the injured nerve after CCI. Double immunofluorescence showed that EPOR was localized to Schwann cells. Furthermore, siRNA-mediated knockdown of EPOR expression eliminated the therapeutic effects of EPO on attenuating the microglial and MAPKs activation, pro-inflammatory cytokine responses, injury discharges, and neuropathic pain behavior in CCI rats. In conclusion, binding of EPO to its receptors on Schwann cells maintains myelin integrity and blocks ectopic discharges in the injured median nerve, that in the end contribute to attenuation of neuropathic pain via reducing glutamate release from primary afferents and inhibiting activation of microglial MAPKs and production of pro-inflammatory cytokines.
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Affiliation(s)
- Chun-Ta Huang
- Department of Internal Medicine, National Taiwan University Hospital, Taipei, Taiwan
| | - Seu-Hwa Chen
- Department of Anatomy, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Shih-Chang Lin
- Division of Allergy and Immunology, Department of Internal Medicine, Cathay General Hospital, Taipei, Taiwan
| | - Wei-Ting Chen
- Department of Anesthesiology, Shin Kong Wu Ho-Su Memorial Hospital, Taipei, Taiwan.,Graduate Institute of Biomedical and Pharmaceutical Science, College of Medicine, Fu Jen Catholic University, New Taipei City, Taiwan
| | - June-Horng Lue
- Department of Anatomy and Cell Biology, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Yi-Ju Tsai
- Graduate Institute of Biomedical and Pharmaceutical Science, College of Medicine, Fu Jen Catholic University, New Taipei City, Taiwan
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Descorbeth M, Figueroa K, Serrano-Illán M, De León M. Protective effect of docosahexaenoic acid on lipotoxicity-mediated cell death in Schwann cells: Implication of PI3K/AKT and mTORC2 pathways. Brain Behav 2018; 8:e01123. [PMID: 30264903 PMCID: PMC6236228 DOI: 10.1002/brb3.1123] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/21/2018] [Revised: 08/07/2018] [Accepted: 08/14/2018] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND AND AIM Docosahexaenoic acid (DHA) exhibits neuroprotective properties and has been shown to preserve nerve cells following trauma and ischemic injury. Recently, we showed that DHA pretreatment improved locomotion and reduced neuropathic pain after acute spinal cord injury in adult rats. These improvements were associated with an increase in the levels of AKT in spinal cord injury neurons. In this study, we investigate the implication of PI3K/AKT and mTOR pathway in DHA-mediated protection of primary cultured Schwann cells (pSC) undergoing palmitic acid-induced lipotoxicity (PA-LTx). METHODS Primary cultured Schwann cells were treated with PA (PA:BSA, 2:1) in the presence or absence of DHA (1-200 µM) for 24-48 hr. Cell viability was determined by crystal violet staining and nuclear morphology was examined using Hoechst staining. RESULTS We found that pSC cultures exposed to palmitic acid (PA) overload showed chromatin condensation, a decrease in cell viability and an inhibition of AKT phosphorylation in a time-dependent manner. Next, pSC exposed to PA overload were treated with DHA. The data show that co-treatment with DHA inhibited the loss of cell viability and apoptosis caused by PA. Moreover, treatment with DHA inhibited chromatin condensation, significantly stimulated p-AKT phosphorylation under PA-LTx condition, and DHA alone increased AKT phosphorylation. Additionally, when these pSC cultures were treated with PI3K inhibitors LY294002 and, BKM120 and mTOR inhibitors Torin 1 (mTORC1/mTORC2), but not rapamycin (mTORC1), the protective effects of DHA were not observed. CONCLUSION These findings suggest PI3K/AKT and mTORC2 kinase pathways are involved in the protective function (s) of DHA in PA-induced Schwann cell death.
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Affiliation(s)
- Magda Descorbeth
- Center for Health Disparities and Molecular Medicine and Department of Basic Sciences, Loma Linda University School of Medicine, Loma Linda, California
| | - Karen Figueroa
- Center for Health Disparities and Molecular Medicine and Department of Basic Sciences, Loma Linda University School of Medicine, Loma Linda, California
| | - Miguel Serrano-Illán
- Center for Health Disparities and Molecular Medicine and Department of Basic Sciences, Loma Linda University School of Medicine, Loma Linda, California
| | - Marino De León
- Center for Health Disparities and Molecular Medicine and Department of Basic Sciences, Loma Linda University School of Medicine, Loma Linda, California
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20
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Ghelani H, Razmovski-Naumovski V, Pragada RR, Nammi S. Attenuation of Glucose-Induced Myoglobin Glycation and the Formation of Advanced Glycation End Products (AGEs) by (R)-α-Lipoic Acid In Vitro. Biomolecules 2018; 8:biom8010009. [PMID: 29419812 PMCID: PMC5871978 DOI: 10.3390/biom8010009] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2017] [Revised: 01/26/2018] [Accepted: 02/01/2018] [Indexed: 11/16/2022] Open
Abstract
High-carbohydrate containing diets have become a precursor to glucose-mediated protein glycation which has been linked to an increase in diabetic and cardiovascular complications. The aim of the present study was to evaluate the protective effect of (R)-α-lipoic acid (ALA) against glucose-induced myoglobin glycation and the formation of advanced glycation end products (AGEs) in vitro. Methods: The effect of ALA on myoglobin glycation was determined via the formation of AGEs fluorescence intensity, iron released from the heme moiety of myoglobin and the level of fructosamine. The extent of glycation-induced myoglobin oxidation was measured via the levels of protein carbonyl and thiol. Results: The results showed that the co-incubation of ALA (1, 2 and 4 mM) with myoglobin (1 mg/mL) and glucose (1 M) significantly decreased the levels of fructosamine, which is directly associated with the decrease in the formation of AGEs. Furthermore, ALA significantly reduced the release of free iron from myoglobin which is attributed to the protection of myoglobin from glucose-induced glycation. The results also demonstrated a significant protective effect of ALA on myoglobin from oxidative damage, as seen from the decreased protein carbonyls and increased protein thiols. Conclusion: The anti-glycation properties of ALA suggest that ALA supplementation may be beneficial in the prevention of AGEs-mediated diabetic and cardiovascular complications.
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Affiliation(s)
- Hardik Ghelani
- School of Science and Health, Western Sydney University, Sydney, NSW 2751, Australia.
- National Institute of Complementary Medicine (NICM), Western Sydney University, Sydney, NSW 2751, Australia.
| | - Valentina Razmovski-Naumovski
- School of Science and Health, Western Sydney University, Sydney, NSW 2751, Australia.
- National Institute of Complementary Medicine (NICM), Western Sydney University, Sydney, NSW 2751, Australia.
- South Western Sydney Clinical School, School of Medicine, University of New South Wales, Sydney, NSW 2052, Australia.
| | - Rajeswara Rao Pragada
- Department of Pharmacology, College of Pharmaceutical Sciences, Andhra University, Visakhapatnam 530003, Andhra Pradesh, India.
| | - Srinivas Nammi
- School of Science and Health, Western Sydney University, Sydney, NSW 2751, Australia.
- National Institute of Complementary Medicine (NICM), Western Sydney University, Sydney, NSW 2751, Australia.
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21
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Ghelani H, Razmovski-Naumovski V, Pragada RR, Nammi S. (R)-α-Lipoic acid inhibits fructose-induced myoglobin fructation and the formation of advanced glycation end products (AGEs) in vitro. Altern Ther Health Med 2018; 18:13. [PMID: 29334926 PMCID: PMC5769525 DOI: 10.1186/s12906-017-2076-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2017] [Accepted: 12/29/2017] [Indexed: 12/20/2022]
Abstract
Background Fructose-mediated protein glycation (fructation) has been linked to an increase in diabetic and cardiovascular complications due to over consumption of high-fructose containing diets in recent times. The objective of the present study is to evaluate the protective effect of (R)-α-lipoic acid (ALA) against fructose-induced myoglobin fructation and the formation of advanced glycation end products (AGEs) in vitro. Methods The anti-glycation activity of ALA was determined using the formation of AGEs fluorescence intensity, iron released from the heme moiety of myoglobin and the level of fructosamine. The fructation-induced myoglobin oxidation was examined using the level of protein carbonyl content and thiol group estimation. Results The results showed that co-incubation of myoglobin (1 mg/mL), fructose (1 M) and ALA (1, 2 and 4 mM) significantly inhibited the formation of AGEs during the 30 day study period. ALA markedly decreased the levels of fructosamine, which is directly associated with the reduction of AGEs formation. Furthermore, ALA significantly reduced free iron release from myoglobin which is attributed to the protection of myoglobin from fructose-induced glycation. The results also demonstrated a significant protective effect of ALA on myoglobin oxidative damages, as seen from decreased protein carbonyl content and increased protein thiols. Conclusion These findings provide new insights into the anti-glycation properties of ALA and emphasize that ALA supplementation is beneficial in the prevention of AGEs-mediated diabetic and cardiovascular complications.
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Xiaogang L, Zhe Z, Rui W, Xinxin X, Yonghui L, Lianqing S. Ginsenoside Rb1 prevents high glucose-induced Schwann cell injury through the mitochondrial apoptosis pathway. J TRADIT CHIN MED 2017. [DOI: 10.1016/s0254-6272(18)30037-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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Gu J, Fan YQ, Zhang JF, Wang CQ. Association of hemoglobin A1c variability and the incidence of heart failure with preserved ejection fraction in patients with type 2 diabetes mellitus and arterial hypertension. Hellenic J Cardiol 2017; 59:91-97. [PMID: 28818638 DOI: 10.1016/j.hjc.2017.08.001] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2017] [Revised: 07/19/2017] [Accepted: 08/02/2017] [Indexed: 12/28/2022] Open
Abstract
BACKGROUND This study aimed to investigate the association between variability in hemoglobin A1c (HbA1c) and left ventricular (LV) diastolic function and incidence of symptomatic heart failure with preserved ejection fraction (HFpEF) in patients with type 2 diabetes mellitus (T2DM) and arterial hypertension. METHODS A retrospective cohort study was conducted on eligible patients with T2DM and hypertension and without clinical signs or symptoms of heart failure in our hospital medical record database. Variability in HbA1c was measured by standard deviation (SD) and coefficient of variation (CV). Risk of new onset of symptomatic HFpEF was evaluated by multivariable cox regression analysis. RESULTS A total of 201 subjects were categorized according to the median value of HbA1c variability indicators. Over a median follow-up of 7.3 years, the percentage of subjects who had new incidence of symptomatic HFpEF was higher in those with higher HbA1c-SD level (5/105 vs. 13/96, P=0.029) and higher HbA1c-CV level (5/101 vs. 13/100, P=0.046). Multivariable cox regression analysis also showed that higher HbA1c variability [HbA1c-SD (HR 1.754, 95% CI: 1.003-3.104, P=0.049) or HbA1c-CV (HR 1.604 95% CI: 1.064-2.419, P=0.024)] was associated with the presence of new-onset symptomatic HFpEF, independent of HbA1c-mean level, in T2DM and hypertensive patients. Moreover, lower HbA1c variability generated more prominent improvement in LV diastolic function (E/E') during the follow-up. CONCLUSIONS HbA1c variability may provide additional valuable information as a potential predictor of the progression of HFpEF in T2DM and hypertensive patients.
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Affiliation(s)
- Jun Gu
- Department of Cardiology, Shanghai Ninth People's Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, People's Republic of China.
| | - Yu-Qi Fan
- Department of Cardiology, Shanghai Ninth People's Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, People's Republic of China
| | - Jun-Feng Zhang
- Department of Cardiology, Shanghai Ninth People's Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, People's Republic of China
| | - Chang-Qian Wang
- Department of Cardiology, Shanghai Ninth People's Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, People's Republic of China.
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Leppert U, Gillespie A, Orphal M, Böhme K, Plum C, Nagorsen K, Berkholz J, Kreutz R, Eisenreich A. The impact of α-Lipoic acid on cell viability and expression of nephrin and ZNF580 in normal human podocytes. Eur J Pharmacol 2017; 810:1-8. [PMID: 28606850 DOI: 10.1016/j.ejphar.2017.06.013] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2017] [Revised: 06/07/2017] [Accepted: 06/08/2017] [Indexed: 02/04/2023]
Abstract
Human podocytes (hPC) are essential for maintaining normal kidney function and dysfunction or loss of hPC play a pivotal role in the manifestation and progression of chronic kidney diseases including diabetic nephropathy. Previously, α-Lipoic acid (α-LA), a licensed drug for treatment of diabetic neuropathy, was shown to exhibit protective effects on diabetic nephropathy in vivo. However, the effect of α-LA on hPC under non-diabetic conditions is unknown. Therefore, we analyzed the impact of α-LA on cell viability and expression of nephrin and zinc finger protein 580 (ZNF580) in normal hPC in vitro. Protein analyses were done via Western blot techniques. Cell viability was determined using a functional assay. hPC viability was dynamically modulated via α-LA stimulation in a concentration-dependent manner. This was associated with reduced nephrin and ZNF580 expression and increased nephrin phosphorylation in normal hPC. Moreover, α-LA reduced nephrin and ZNF580 protein expression via 'kappa-light-chain-enhancer' of activated B-cells (NF-κB) inhibition. These data demonstrate that low α-LA had no negative influence on hPC viability, whereas, high α-LA concentrations induced cytotoxic effects on normal hPC and reduced nephrin and ZNF580 expression via NF-κB inhibition. These data provide first novel information about potential cytotoxic effects of α-LA on hPC under non-diabetic conditions.
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Affiliation(s)
- Ulrike Leppert
- Charité-Universitätsmedizin Berlin, CC02, Institut für Physiologie, Berlin, Germany
| | - Allan Gillespie
- Charité-Universitätsmedizin Berlin, CC04, Institut für Klinische Pharmakologie und Toxikologie, Berlin, Germany
| | - Miriam Orphal
- Charité-Universitätsmedizin Berlin, CC04, Institut für Klinische Pharmakologie und Toxikologie, Berlin, Germany
| | - Karen Böhme
- Charité-Universitätsmedizin Berlin, CC04, Institut für Klinische Pharmakologie und Toxikologie, Berlin, Germany
| | - Claudia Plum
- Charité-Universitätsmedizin Berlin, CC04, Institut für Klinische Pharmakologie und Toxikologie, Berlin, Germany
| | - Kaj Nagorsen
- Charité-Universitätsmedizin Berlin, CC02, Institut für Physiologie, Berlin, Germany
| | - Janine Berkholz
- Charité-Universitätsmedizin Berlin, CC02, Institut für Physiologie, Berlin, Germany
| | - Reinhold Kreutz
- Charité-Universitätsmedizin Berlin, CC04, Institut für Klinische Pharmakologie und Toxikologie, Berlin, Germany
| | - Andreas Eisenreich
- Charité-Universitätsmedizin Berlin, CC04, Institut für Klinische Pharmakologie und Toxikologie, Berlin, Germany.
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Erythropoietin Modification Enhances the Protection of Mesenchymal Stem Cells on Diabetic Rat-Derived Schwann Cells: Implications for Diabetic Neuropathy. BIOMED RESEARCH INTERNATIONAL 2017; 2017:6352858. [PMID: 28299330 PMCID: PMC5337339 DOI: 10.1155/2017/6352858] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/20/2016] [Accepted: 01/05/2017] [Indexed: 11/18/2022]
Abstract
Diabetes-triggered apoptosis of Schwann cells (SC) contributes to the degradation of diabetic peripheral neuropathy (DNP). In recent years, mesenchymal stem cells (MSC) were applied to DPN repair and it was demonstrated that paracrine secretion played a key role in neuroprotection exerted by MSC. Erythropoietin (EPO) is a potent cytokine capable of reducing apoptosis of SC. However, the expression of EPO in MSC is limited. In this study, we hypothesized that overexpression of EPO in MSC (EPO-MSC) may significantly improve their neuroprotective potentials. The EPO overexpression in MSC was achieved by lentivirus transduction. SC derived from the periphery nerve of diabetic rats were cocultured with MSC or EPO-MSC in normal or high glucose culture condition, respectively. In normal glucose culture condition, the overexpression of EPO in MSC promoted the MSC-induced restoration of SC from diabetic rats, including increases in GSH level and cell viability, decrease in TUNEL apoptosis, upregulation of antiapoptotic proteins, p-Akt, and Bcl-2, and downregulation of proapoptotic proteins, cleaved caspase-3, and Bax. The subsequent results in high glucose culture condition showed similar promotions achieved by EPO-MSC. Thus, it could be concluded that EPO-MSC possessed a potent potential in hampering apoptosis of SC, and the suppression was probably attributed to attenuating oxidative stress and regulating apoptosis related protein factors.
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Wang BB, Wang JL, Yuan J, Quan QH, Ji RF, Tan P, Han J, Liu YG. Sugar Composition Analysis of Fuzi Polysaccharides by HPLC-MS n and Their Protective Effects on Schwann Cells Exposed to High Glucose. Molecules 2016; 21:molecules21111496. [PMID: 27834877 PMCID: PMC6273632 DOI: 10.3390/molecules21111496] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2016] [Revised: 11/02/2016] [Accepted: 11/02/2016] [Indexed: 12/29/2022] Open
Abstract
Fuzi has been used to treat diabetic complications for many years in china. In a previous study, we have shown that Fuzi aqueous extract can attenuate Diabetic peripheral neuropathy (DPN) in rats and protect Schwann cells from injury. Thus, the protective effect of Fuzi polysaccharides (FPS) on high glucose-induced SCs and the preliminary mechanism were investigated. Firstly, the FPS were obtained and their monose composition was analyzed by the combination of pre-column derivatization and high performance liquid chromatography coupled with electrospray ionization multi-tandem mass spectrometry (HPLC/ESI-MSn). The results witnessed the efficiency of this method and seven monosaccharides were tentatively identified, among which fucose was first reported. Simultaneously, m/z 215 can be considered as diagnostic ions to confirm the number of monosaccharides. Next, high glucose-induced SC model was applied and divided into model group, treated group of FPS, normal and osmotic control group. After treatment for 48 h, the data showed FPS could significantly decrease the intracellular ROS and apoptosis, which were determined by the corresponding fluorescent probes. Then, the expression of oxidative stress-related proteins in SCs were measured by Western blot. Furthermore, the protein tests found that FPS markedly up-regulated superoxide dismutase (SOD), catalase (CAT) and peroxisome proliferator-activated receptor gamma coactivator 1-alpha (PGC-1α) protein level, but down-regulated NADPH oxidase-1 (Nox1) protein level. Moreover, FPS could also increase AMP-activated protein kinase (AMPK) activation significantly. Hence, we preliminary deduced that AMPK-PGC-1α pathway may play an important role in the protective effect of FPS against high glucose-induced cell damage.
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Affiliation(s)
- Bei-Bei Wang
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Wangjing Zhonghuan Road No. 6 School Range, Chaoyang District, Beijing 100102, China.
| | - Jia-Li Wang
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Wangjing Zhonghuan Road No. 6 School Range, Chaoyang District, Beijing 100102, China.
| | - Jiang Yuan
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Wangjing Zhonghuan Road No. 6 School Range, Chaoyang District, Beijing 100102, China.
| | - Qing-Hua Quan
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Wangjing Zhonghuan Road No. 6 School Range, Chaoyang District, Beijing 100102, China.
| | - Rui-Fang Ji
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Wangjing Zhonghuan Road No. 6 School Range, Chaoyang District, Beijing 100102, China.
| | - Peng Tan
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Wangjing Zhonghuan Road No. 6 School Range, Chaoyang District, Beijing 100102, China.
| | - Jing Han
- Beijing Chinese Medicine Research Institute, Beijing University of Chinese Medicine, North Third Ring Road No. 11 School Range, Chaoyang District, Beijing 100029, China.
| | - Yong-Gang Liu
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Wangjing Zhonghuan Road No. 6 School Range, Chaoyang District, Beijing 100102, China.
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Jin HY, Lee NY, Ko HA, Lee KA, Park TS. Comparison of sensory tests and neuronal quantity of peripheral nerves between streptozotocin (STZ)-induced diabetic rats and paclitaxel (PAC)-treated rats. Somatosens Mot Res 2016; 33:186-195. [DOI: 10.1080/08990220.2016.1239577] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Aly HAA, Mansour AM, Hassan MH, Abd-Ellah MF. Lipoic acid attenuates Aroclor 1260-induced hepatotoxicity in adult rats. ENVIRONMENTAL TOXICOLOGY 2016; 31:913-922. [PMID: 25533183 DOI: 10.1002/tox.22101] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/29/2014] [Revised: 12/05/2014] [Accepted: 12/07/2014] [Indexed: 06/04/2023]
Abstract
The present study was aimed to investigate the mechanistic aspect of Aroclor 1260-induced hepatotoxicity and its protection by lipoic acid. The adult male Albino rats were divided into six groups. Group I served as control. Group II received lipoic acid (35 mg/kg/day). Aroclor 1260 was given to rats by oral gavage at doses 20, 40, or 60 mg/kg/day (Groups III, IV, and V, respectively). Group VI was pretreated with lipoic acid (35 mg/kg/day) 24 h before Aroclor 1260 (40 mg/kg/day). Treatment in all groups was continued for further 15 consecutive days. Serum alanine aminotransferase, aspartate aminotransferase, alkaline phosphatase, and lactate dehydrogenase activities and total bilirubin, total cholesterol, and triglycerides were significantly increased while total protein, total albumin, and high-density lipoprotein were significantly decreased. Hydrogen peroxide production and lipid peroxidation were significantly increased while superoxide dismutase and catalase activities and reduced glutathione (GSH) content was significantly decreased in liver. Caspase-3 & -9 activities were significantly increased in liver. Lipoic acid pretreatment significantly reverted all these abnormalities toward their normal levels. In conclusion, Aroclor 1260 induced liver dysfunction, at least in part, by induction of oxidative stress. Apoptotic effect of hepatic cells is involved in Aroclor 1260-induced liver injury. Lipoic acid could protect rats against Aroclor 1260-induced hepatotoxicity. © 2014 Wiley Periodicals, Inc. Environ Toxicol 31: 913-922, 2016.
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Affiliation(s)
- Hamdy A A Aly
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, King Abdulaziz University, Jeddah, Saudi Arabia
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Al-Azhar University, Nasr City, Cairo, Egypt
| | - Ahmed M Mansour
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Al-Azhar University, Nasr City, Cairo, Egypt
| | - Memy H Hassan
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Al-Azhar University, Nasr City, Cairo, Egypt
- Department of Pharmacology and Toxicology, College of Pharmacy, Taibah University, El-Madinah El-Munaworah, Saudi Arabia
| | - Mohamed F Abd-Ellah
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Al-Azhar University, Nasr City, Cairo, Egypt
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Yang X, Yao W, Shi H, Liu H, Li Y, Gao Y, Liu R, Xu L. Paeoniflorin protects Schwann cells against high glucose induced oxidative injury by activating Nrf2/ARE pathway and inhibiting apoptosis. JOURNAL OF ETHNOPHARMACOLOGY 2016; 185:361-369. [PMID: 26979341 DOI: 10.1016/j.jep.2016.03.031] [Citation(s) in RCA: 64] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2015] [Revised: 01/17/2016] [Accepted: 03/11/2016] [Indexed: 06/05/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Paeoniflorin (PF) is the principal bioactive component of Paeonia lactiflora Pall., which an included in Tang Luo Ning recipe, a traditional Chinese herbal medicine based on Huangqi Guizhi Wuwu decoction. PF is also widely used in Traditional Chinese Medicine for the treatment of blood-arthralgia disease including diabetic peripheral neuropathy (DPN), but its underlying molecular mechanism of neuroprotective effects is not yet well understood. Diabetic hyperglycemia induced oxidative stress in Schwann cells, an important component of the peripheral nervous system, has been proposed as a unifying mechanism for DPN. The objective of this study is to determine the effects of PF on Schwann cells oxidative stress and apoptosis induced by high glucose. MATERIALS AND METHODS RSC96 cells, a Schwann cell line, were treated with high glucose (150mM) and PF (1, 10 and 100μM). Subsequently, MTT assay was performed. The level of apoptosis was examined by flow cytometry and the oxidative stress was reflected by reactive oxygen species (ROS), malondialdehyde (MDA), glutathione S-transferases (GST) and glutathione peroxidase (GPX) levels. The mRNA expressions of Nuclear factor-E2-related factor 2 (Nrf2) and heme oxygenase 1 (HO-1) were detected by qRT-PCR. The levels of Kelch-like ECH-associating protein 1 (Keap1), Nrf2, HO-1, γ-glutamylcysteine synthetase (γGCS), B-cell CLL/lymphoma 2 (Bcl-2), Bax and Caspase 3 were detected by High content analysis and/or Western blot. RESULTS The role of PF markedly suppressed high glucose induced Schwann cells oxidative stress by decreasing ROS and MDA levels and increasing GST and GPX activity. Western blot analysis showed that PF induced nuclear translocation of Nrf2. High content analysis showed that PF promoted Nrf2 dissociation from Keap1 and upregulating the Nrf2/ antioxidant response element (ARE) pathway. Furthermore, PF reduced Schwann cells apoptosis by increasing Bcl-2 and inhibiting Bax and Caspase-3 expressions. CONCLUSIONS PF in the management of Schwann cells oxidative stress induced by high glucose may be associated with activation of Nrf2/ARE pathway and Bcl-2-related apoptotic pathway.
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Affiliation(s)
- Xinwei Yang
- School of Traditional Chinese Medicine, Capital Medical University, #10, Youanmenwai Xitoutiao, Fengtai District, Beijing 100069, China; Beijing Key Lab of TCM Collateral Disease Theory Research China
| | - Weijie Yao
- School of Traditional Chinese Medicine, Capital Medical University, #10, Youanmenwai Xitoutiao, Fengtai District, Beijing 100069, China; Beijing Key Lab of TCM Collateral Disease Theory Research China
| | - Haotian Shi
- School of Traditional Chinese Medicine, Capital Medical University, #10, Youanmenwai Xitoutiao, Fengtai District, Beijing 100069, China; Beijing Key Lab of TCM Collateral Disease Theory Research China
| | - Haolong Liu
- School of Traditional Chinese Medicine, Capital Medical University, #10, Youanmenwai Xitoutiao, Fengtai District, Beijing 100069, China; Beijing Key Lab of TCM Collateral Disease Theory Research China
| | - Yangfan Li
- School of Traditional Chinese Medicine, Capital Medical University, #10, Youanmenwai Xitoutiao, Fengtai District, Beijing 100069, China; Beijing Key Lab of TCM Collateral Disease Theory Research China
| | - Yanbin Gao
- School of Traditional Chinese Medicine, Capital Medical University, #10, Youanmenwai Xitoutiao, Fengtai District, Beijing 100069, China; Beijing Key Lab of TCM Collateral Disease Theory Research China
| | - Renhui Liu
- School of Traditional Chinese Medicine, Capital Medical University, #10, Youanmenwai Xitoutiao, Fengtai District, Beijing 100069, China; Beijing Key Lab of TCM Collateral Disease Theory Research China
| | - Liping Xu
- School of Traditional Chinese Medicine, Capital Medical University, #10, Youanmenwai Xitoutiao, Fengtai District, Beijing 100069, China.
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La Sala L, Cattaneo M, De Nigris V, Pujadas G, Testa R, Bonfigli AR, Genovese S, Ceriello A. Oscillating glucose induces microRNA-185 and impairs an efficient antioxidant response in human endothelial cells. Cardiovasc Diabetol 2016; 15:71. [PMID: 27137793 PMCID: PMC4852407 DOI: 10.1186/s12933-016-0390-9] [Citation(s) in RCA: 62] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/20/2015] [Accepted: 04/21/2016] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Intracellular antioxidant response to high glucose is mediated by Cu/Mn-superoxide dismutases (SOD-1/SOD-2), catalase (CAT) and glutathione peroxidases (GPx), particularly glutathione peroxidase-1 (GPx-1). Although oscillating glucose can induce a more deleterious effect than high glucose on endothelial cells, the mechanism by which oscillating glucose exerts its dangerous effects is incompletely understood; however, the involvement of oxidative damage has been generally accepted. In this study we sought to determine whether oscillating glucose differentially modulates antioxidant response, and to elucidate the potential regulatory mechanisms exerted by the microRNA-185 (miR-185). METHODS Human endothelial cells were exposed for 1 week to constant and oscillating high glucose. SOD-1, SOD-2, CAT and GPx-1, as well as two markers of oxidative stress [8-hydroxy-2'-deoxyguanosine (8-OHdG) and the phosphorylated form of H2AX (γ-H2AX)] were measured at the end of the experiment. Intracellular miR-185 was measured and loss-of function assays were performed in HUVEC. Bioinformatic tool was used to predict the link between miR-185 on 3'UTR of GPx-1 gene. Luciferase assay was performed to confirm the binding on HUVEC. RESULTS After exposure to constant high glucose SOD-1 and GPx-1 increased, while in oscillating glucose SOD-1 increased and GPx-1 did not. SOD-2 and CAT remained unchanged under both conditions. A critical involvement of oscillating glucose-induced miR-185 in the dysregulation of endogenous GPx-1 was found. Computational analyses predict GPx-1 as miR-185's target. HUVEC cultures were used to confirm glucose's causal role on the expression of miR-185, its target mRNA and protein and finally the activation of antioxidant response. In vitro luciferase assays confirmed computational predictions targeting of miR-185 on 3'-UTR of GPx-1 mRNA. Knockdown of miR-185, using anti-miR-185 inhibitor, was accompanied by a significant upregulation of GPx-1 in oscillating glucose. 8-OHdG and γ-H2AX increased more in oscillating glucose than in constant high glucose. CONCLUSIONS Glucose oscillations may exert more deleterious effects on the endothelium than high glucose, likely due to an impaired response of GPx-1, coupled by the upregulation of miR-185.
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Affiliation(s)
- Lucia La Sala
- Department of Cardiovascular Research, IRCCS MultiMedica, Milan, MI, Italy
| | - Monica Cattaneo
- Department of Cardiovascular Research, IRCCS MultiMedica, Milan, MI, Italy
| | - Valeria De Nigris
- Insititut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS) and Centro de Investigación Biomedica en Red de Diabetes y Enfermedades Metabólicas Asociadas (CIBERDEM), Barcelona, Spain
| | - Gemma Pujadas
- Insititut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS) and Centro de Investigación Biomedica en Red de Diabetes y Enfermedades Metabólicas Asociadas (CIBERDEM), Barcelona, Spain
| | - Roberto Testa
- Experimental Models in Clinical Pathology, INRCA-IRCCS National Institute, Ancona, Italy
| | - Anna R Bonfigli
- Scientific Direction, INRCA, Via S. Margherita, 5, Ancona, 60124, Italy
| | - Stefano Genovese
- Department of Cardiovascular Research, IRCCS MultiMedica, Milan, MI, Italy
| | - Antonio Ceriello
- Insititut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS) and Centro de Investigación Biomedica en Red de Diabetes y Enfermedades Metabólicas Asociadas (CIBERDEM), Barcelona, Spain.
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Joubert M, Hardouin J, Legallois D, Blanchart K, Elie N, Nowoczyn M, Croisille P, Coulbault L, Bor-Angelier C, Allouche S, Manrique A. Effects of glycaemic variability on cardiac remodelling after reperfused myocardial infarction: Evaluation of streptozotocin-induced diabetic Wistar rats using cardiac magnetic resonance imaging. DIABETES & METABOLISM 2016; 42:342-350. [PMID: 26971835 DOI: 10.1016/j.diabet.2016.02.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2015] [Revised: 01/27/2016] [Accepted: 02/15/2016] [Indexed: 10/22/2022]
Abstract
AIMS In addition to hyperglycaemia, glycaemic variability seems to be associated with poor outcomes after acute myocardial infarction. This study explored the impact of glycaemic variability in diabetic Wistar rats subjected to myocardial ischaemia/reperfusion. METHODS Animals with streptozotocin-induced diabetes received insulin either to maintain stable hyperglycaemia (Dh group) or to generate glycaemic variability (Dv). After experimental myocardial ischaemia/reperfusion was surgically induced, 7T cardiac magnetic resonance imaging (CMR) was performed at weeks 1 (w1) and 3 (w3). RESULTS Twenty-six rats were randomized [sham group (S): n=5; control group (C): n=7; Dh group: n=6; and Dv group: n=8]. The mean amplitude of glucose reflecting glycaemic variability was higher in the Dv than in the Dh group (9.1±2.7mmol/L vs 5.9±1.9mmol/L; P<0.05). CMR assessment at w3 revealed ventricular enlargement in both Dh and Dv groups compared with the C and S groups (end-diastolic volume: 1.60±0.22 and 1.36±0.30mL/kg compared with 1.11±0.13 and 0.87±0.11mL/kg, respectively; P<0.05). Circumferential strain was altered between w1 and w3 in the remote area only in the Dv group, resulting in a lower value in this group than in the S, C and Dh groups (-0.11±0.01 vs -0.17±0.05, -0.15±0.03 and -0.16±0.03, respectively; P<0.05). In addition, at w3, oedema was also higher in the remote area in the Dv than in the C group (18.3±4.9ms vs 14.5±1.7ms, respectively; P<0.05). CONCLUSION In the context of experimental myocardial ischaemia/reperfusion, our results suggest that glycaemic variability might have a potentially deleterious impact on myocardial outcomes beyond the classical glucose metrics.
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Affiliation(s)
- M Joubert
- Diabetes Care Unit, Caen University Hospital, Caen, France; EA4650 Normandie université, GIP Cyceron, 14000 Caen, France.
| | - J Hardouin
- Diabetes Care Unit, Caen University Hospital, Caen, France; EA4650 Normandie université, GIP Cyceron, 14000 Caen, France.
| | - D Legallois
- Cardiology Unit, Caen University Hospital, 14033 Caen, France; EA4650 Normandie université, GIP Cyceron, 14000 Caen, France.
| | - K Blanchart
- Cardiology Unit, Caen University Hospital, 14033 Caen, France; EA4650 Normandie université, GIP Cyceron, 14000 Caen, France.
| | - N Elie
- CMABIO-HIQ Facility, SF4206 ICORE, IBFA, University of Caen, 14000 Caen, France.
| | - M Nowoczyn
- Biochemistry Unit, Caen University Hospital, 14000 Caen, France; EA4650 Normandie université, GIP Cyceron, 14000 Caen, France.
| | - P Croisille
- Radiology Department, Saint-Etienne University Hospital, 42000 Saint-Etienne, France; CREATIS CNRS UMR5220 Inserm U1044, Lyon University, 69000 Lyon, France.
| | - L Coulbault
- Biochemistry Unit, Caen University Hospital, 14000 Caen, France; EA4650 Normandie université, GIP Cyceron, 14000 Caen, France.
| | - C Bor-Angelier
- Pathology Department, F.-Baclesse Cancer Center, 14000 Caen, France.
| | - S Allouche
- Biochemistry Unit, Caen University Hospital, 14000 Caen, France; EA4650 Normandie université, GIP Cyceron, 14000 Caen, France.
| | - A Manrique
- Nuclear Medicine Department, Caen University Hospital, 14033 Caen, France; EA4650 Normandie université, GIP Cyceron, 14000 Caen, France.
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Yin X, Zheng F, Pan Q, Zhang S, Yu D, Xu Z, Li H. Glucose fluctuation increased hepatocyte apoptosis under lipotoxicity and the involvement of mitochondrial permeability transition opening. J Mol Endocrinol 2015; 55:169-81. [PMID: 26464382 DOI: 10.1530/jme-15-0101] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Oxidative stress is considered to be an important factor in producing lethal hepatocyte injury associated with nonalcoholic fatty liver disease (NAFLD). Glucose fluctuation, more pronounced in patients with diabetes, has been recognized as an even stronger oxidative stress inducer than the sustained hyperglycemia. Here, we investigated the role of glucose variability in the development of the NAFLD based on hepatocyte apoptosis and possible mechanisms. To achieve this goal we studied C57BL/6J mice that were maintained on a high fat diet (HFD) and injected with glucose (3 g/kg) twice daily to induce intermittent high glucose (IHG). We also studied hepatic L02 cells incubated with palmitic acid (PA) to induce steatosis. The following experimental groups were compared: normal glucose (NG), sustained high glucose (SHG) and IHG with or without PA. We found that, although hepatic enzyme levels and liver lipid deposition were comparable between HFD mice injected with glucose or saline, the glucose injected mice displayed marked hepatocyte apoptosis and inflammation, accompanied by increased lipid peroxide in liver. In vitro, in the presence of PA, IHG increased L02 cell apoptosis and oxidative stress and produced pronounced mitochondrial dysfunction relative to the NG and SHG groups. Furthermore, treatment with the mitochondrial permeability transition (MPT) inhibitor, cyclosporin A (1.5 μmol/l), prevented mitochondrial dysfunction, oxidative stress and hepatocyte apoptosis. Our data suggests that IHG under lipotoxicity might contribute to the development of NAFLD by increasing oxidative stress and hepatocyte apoptosis via MPT and its related mitochondrial dysfunction.
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Affiliation(s)
- Xueyao Yin
- Department of EndocrinologySchool of Medicine, The Affiliated Sir Run Run Shaw Hospital, Zhejiang University, 3 East Qingchun Road, Hangzhou 310016, China
| | - Fenping Zheng
- Department of EndocrinologySchool of Medicine, The Affiliated Sir Run Run Shaw Hospital, Zhejiang University, 3 East Qingchun Road, Hangzhou 310016, China
| | - Qianqian Pan
- Department of EndocrinologySchool of Medicine, The Affiliated Sir Run Run Shaw Hospital, Zhejiang University, 3 East Qingchun Road, Hangzhou 310016, China
| | - Saifei Zhang
- Department of EndocrinologySchool of Medicine, The Affiliated Sir Run Run Shaw Hospital, Zhejiang University, 3 East Qingchun Road, Hangzhou 310016, China
| | - Dan Yu
- Department of EndocrinologySchool of Medicine, The Affiliated Sir Run Run Shaw Hospital, Zhejiang University, 3 East Qingchun Road, Hangzhou 310016, China
| | - Zhiye Xu
- Department of EndocrinologySchool of Medicine, The Affiliated Sir Run Run Shaw Hospital, Zhejiang University, 3 East Qingchun Road, Hangzhou 310016, China
| | - Hong Li
- Department of EndocrinologySchool of Medicine, The Affiliated Sir Run Run Shaw Hospital, Zhejiang University, 3 East Qingchun Road, Hangzhou 310016, China
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YU YANG, MA XIAOYE, YANG TAO, LI BO, XIE KELIANG, LIU DAQUAN, WANG GUOLIN, YU YONGHAO. Protective effect of hydrogen-rich medium against high glucose-induced apoptosis of Schwann cells in vitro. Mol Med Rep 2015; 12:3986-3992. [DOI: 10.3892/mmr.2015.3874] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2014] [Accepted: 05/08/2015] [Indexed: 11/06/2022] Open
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La Sala L, Pujadas G, De Nigris V, Canivell S, Novials A, Genovese S, Ceriello A. Oscillating glucose and constant high glucose induce endoglin expression in endothelial cells: the role of oxidative stress. Acta Diabetol 2015; 52:505-12. [PMID: 25398480 DOI: 10.1007/s00592-014-0670-3] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/25/2014] [Accepted: 10/17/2014] [Indexed: 12/15/2022]
Abstract
AIM High glucose-induced oxidative stress has been suggested as one of the mediators of endothelial damage in diabetes. The major endothelial protein, endoglin, has been found overexpressed in the vessels during pathological situations, but little is known about its relation to diabetic vascular complications. To clarify the role of endoglin in endothelial injury, we sought to determine the effects of high and oscillating glucose on its expression. MATERIALS Furthermore, the activation of the Krüppel-like factor 6 (KLF-6) and the hypoxia-inducible factor-1α (HIF-1α) as possible regulators of endoglin expression has been evaluated. The possible role of the oxidative stress has been studied evaluating the effects of the antioxidant alpha-lipoic acid (ALA) and the cellular antioxidant response mediated by NAD(P)H quinine-oxido-reductase-1 (NQO-1) and heme oxygenase-1 (HO-1). RESULTS Primary HUVECs were cultured for 21 days in normal, high and oscillating glucose (5, 25 and 5/25 mmol/l every 24 h, respectively) with/without ALA. In oscillating and high glucose total endoglin, its soluble form (sEng), KLF-6 and HIF-1α were significantly increased. Simultaneously, the oxidative DNA stress markers 8-OHdG and H2A.X were elevated. Moreover, ENG gene transcriptional rate increased during glucose exposures concomitantly with increased KLF-6 nuclear translocations. ALA significantly reduced all these phenomena. Interestingly, during oscillating and chronic high glucose, NQO-1 and HO-1 did not increase, but ALA induced their overexpression. CONCLUSIONS Together, these findings provide novel clue about endoglin in the regulation of high glucose-mediated vascular damage in HUVECs and the role of oxidative stress in this regulation.
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Affiliation(s)
- Lucia La Sala
- Institut d'Investigación Biomédiques August Pi i Sunyer (IDIBAPS) and Centro de Investigación Biomedica en Red de Diabetes y Enfermedades Metabolicas Asociadas (CIBERDEM), Hospital Clinic, C/Rosselló, 149-153, 08036, Barcelona, Spain
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Tsukamoto M, Sango K, Niimi N, Yanagisawa H, Watabe K, Utsunomiya K. Upregulation of galectin-3 in immortalized Schwann cells IFRS1 under diabetic conditions. Neurosci Res 2015; 92:80-5. [DOI: 10.1016/j.neures.2014.11.008] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2014] [Revised: 10/23/2014] [Accepted: 11/27/2014] [Indexed: 01/08/2023]
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Zhang J, Deng H, Liu L, Liu X, Zuo X, Xu Q, Wu Z, Peng X, Ji A. α-Lipoic acid protects against hypoxia/reoxygenation-induced injury in human umbilical vein endothelial cells through suppression of apoptosis and autophagy. Mol Med Rep 2015; 12:180-6. [PMID: 25684163 PMCID: PMC4438966 DOI: 10.3892/mmr.2015.3351] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2014] [Accepted: 11/14/2014] [Indexed: 01/16/2023] Open
Abstract
α-lipoic acid (ALA) is known as a powerful antioxidant, which has been reported to have protective effects against various cardiovascular diseases. The present study aimed to determine whether ALA pre- or post-treatment induced protective effects against hypoxia/reoxygenation-induced injury via inhibition of apoptosis and autophagy in human umbilical vein endothelial cells (HUVECs). In order to simulate the conditions of hypoxia/reoxygenation, HUVECs were subjected to 4 h of oxygen-glucose deprivation (OGD) followed by 12 h of reoxygenation. For the pre-treatment, ALA was added to the buffer 12 h prior to OGD, whereas for the post-treatment, ALA was added at the initiation of reoxygenation. The results demonstrated that ALA pre- or post-treatment significantly reduced lactate dehydrogenase (LDH) release induced through hypoxia/reoxygenation in HUVECs in a dose-dependent manner; of note, 1 mM ALA pre- or post-treatment exhibited the most potent protective effects. In addition, ALA significantly reduced hypoxia/reoxygenation-induced loss of mitochondrial membrane potential, apoptosis and the expression of cleaved caspase-3 in HUVECs. In the presence of the specific autophagy inhibitor 3-methyladenine, hypoxia/reoxygenation-induced apoptosis was significantly reduced. Furthermore, the formation of autophagosomes, cytosolic microtubule-associated protein 1A/1B-light chain 3 ratio and beclin1 levels significantly increased following hypoxia/reoxygenation injury; however, all of these effects were ameliorated following pre- or post-treatment with ALA. The results of the present study suggested that ALA may provide beneficial protection against hypoxia/reoxygenation-induced injury via attenuation of apoptosis and autophagy in HUVECs.
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Affiliation(s)
- Jingjing Zhang
- Center for Drug Research and Development, Zhujiang Hospital, Southern Medical University, Guangzhou, Guangdong 510282, P.R. China
| | - Houliang Deng
- Center for Drug Research and Development, Zhujiang Hospital, Southern Medical University, Guangzhou, Guangdong 510282, P.R. China
| | - Li Liu
- Center for Drug Research and Development, Zhujiang Hospital, Southern Medical University, Guangzhou, Guangdong 510282, P.R. China
| | - Xiaoxia Liu
- Center for Drug Research and Development, Zhujiang Hospital, Southern Medical University, Guangzhou, Guangdong 510282, P.R. China
| | - Xialin Zuo
- Institute of Neurosciences, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong 510260, P.R. China
| | - Qian Xu
- Center for Drug Research and Development, Zhujiang Hospital, Southern Medical University, Guangzhou, Guangdong 510282, P.R. China
| | - Zhuomin Wu
- Center for Drug Research and Development, Zhujiang Hospital, Southern Medical University, Guangzhou, Guangdong 510282, P.R. China
| | - Xiaobin Peng
- School of Pharmaceutical Sciences, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China
| | - Aimin Ji
- Center for Drug Research and Development, Zhujiang Hospital, Southern Medical University, Guangzhou, Guangdong 510282, P.R. China
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Calcium signalling in sensory neurones and peripheral glia in the context of diabetic neuropathies. Cell Calcium 2014; 56:362-71. [PMID: 25149565 DOI: 10.1016/j.ceca.2014.07.005] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2014] [Revised: 07/11/2014] [Accepted: 07/12/2014] [Indexed: 12/14/2022]
Abstract
Peripheral sensory nervous system is comprised of neurones with their axons and neuroglia that includes satellite glial cells in sensory ganglia, myelinating, non-myelinating and perisynaptic Schwann cells. Pathogenesis of peripheral diabetic polyneuropathies is associated with aberrant function of both neurones and glia. Deregulated Ca(2+) homoeostasis and aberrant Ca(2+) signalling in neuronal and glial elements contributes to many forms of neuropathology and is fundamental to neurodegenerative diseases. In diabetes both neurones and glia experience metabolic stress and mitochondrial dysfunction which lead to deregulation of Ca(2+) homeostasis and Ca(2+) signalling, which in their turn lead to pathological cellular reactions contributing to development of diabetic neuropathies. Molecular cascades responsible for Ca(2+) homeostasis and signalling, therefore, can be regarded as potential therapeutic targets.
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Zhang Z, Li J, Jiang X, Yang L, Lei L, Cai D, Zhang H, Chen H. GLP-1 ameliorates the proliferation activity of INS-1 cells inhibited by intermittent high glucose concentrations through the regulation of cyclins. Mol Med Rep 2014; 10:683-8. [PMID: 24859892 DOI: 10.3892/mmr.2014.2265] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2013] [Accepted: 03/10/2014] [Indexed: 11/06/2022] Open
Abstract
Glucagon-like peptide-1 (GLP-1) and its analog exendin (EX)-4 have been considered to promote β-cell growth and expansion. In the present, study we investigated the effect of GLP-1 on proliferative activity and cell cycle regulation in the pancreatic insulin-secreting β-cell line, INS-1, treated with intermittent high glucose. INS-1 cells were treated with normal glucose (5.5 mmol/l), constant high glucose (30 mmol/l) and intermittent high glucose (rotation/24 h in 5.5 or 30 mmol/l) in the presence or absence of GLP-1 (100 nmol/l) for seven days. Proliferative activity, cell cycle and the expression of cyclin D1, p21, p27 and Skp2 were examined. INS-1 treated with intermittent high glucose and GLP-1 demonstrated a significant increase in proliferation activity (1.45±0.12; P<0.01) and decreased cell proportion in G0/G1 phase (49.73±4.04%, P<0.01) compared with those without GLP-1. Furthermore, the expression levels of cyclin D1 and Skp2 were increased, while the expression of p27 and p21 were significantly reduced. Similar results were identified in those treated with constant high glucose and GLP-1. These results suggest that GLP-1 may ease the G0/G1 cell cycle arrest of INS-1 cells induced by intermittent high glucose by upregulating the expression of cyclin D1 and Skp2, downregulating the expression of p21 and p27, and finally promoting the cell cycle progression and proliferation activity.
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Affiliation(s)
- Zhen Zhang
- Department of Endocrinology, Zhujiang Hospital, Southern Medical University, Guangzhou, Guangdong, P.R. China
| | - Jing Li
- Department of Endocrinology, Nanshan Affiliated Hospital of Guangdong Medical College, Shenzhen, Guangdong, P.R. China
| | - Xinkui Jiang
- Function Department of Nanshan Maternal and Child's Hospital, Shenzhen, Guangdong, P.R. China
| | - Lei Yang
- Department of Nephrology, Zhujiang Hospital, Southern Medical University, Guangzhou, Guangdong, P.R. China
| | - Lei Lei
- Department of Endocrinology, Zhujiang Hospital, Southern Medical University, Guangzhou, Guangdong, P.R. China
| | - Dehong Cai
- Department of Endocrinology, Zhujiang Hospital, Southern Medical University, Guangzhou, Guangdong, P.R. China
| | - Hua Zhang
- Department of Endocrinology, Zhujiang Hospital, Southern Medical University, Guangzhou, Guangdong, P.R. China
| | - Hong Chen
- Department of Endocrinology, Zhujiang Hospital, Southern Medical University, Guangzhou, Guangdong, P.R. China
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Jiang X, Tang X, Zhang P, Liu G, Guo H. Cyanidin-3-O-β-glucoside protects primary mouse hepatocytes against high glucose-induced apoptosis by modulating mitochondrial dysfunction and the PI3K/Akt pathway. Biochem Pharmacol 2014; 90:135-44. [PMID: 24821109 DOI: 10.1016/j.bcp.2014.04.018] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2014] [Revised: 04/27/2014] [Accepted: 04/30/2014] [Indexed: 12/20/2022]
Abstract
Apoptosis is an early event of steatohepatitis in non-alcoholic fatty liver disease (NAFLD), and an increase in oxidative stress induced by hyperglycemia has been linked to an acceleration of apoptosis in hepatocytes. Cyanidin-3-O-β-glucoside (C3G), a classic anthocyanin, has been reported to reduce oxidative stress and attenuate non-alcoholic steatohepatitis in mice. In this study, we evaluated the toxicity of high glucose in primary hepatocytes of mice fed with a high fat diet and amelioration of this toxicity by C3G. Incubation of hepatocytes with 35mM glucose for 12h resulted in a significant decrease in cell viability and increase in apoptotic cell death. Furthermore, hyperglycemia-induced mitochondrial depolarization was accompanied by the release of cytochrome c and altered expression of Bax and Bcl-2, suggesting a mitochondria-mediated apoptotic mode of cell death. Pre-incubation with 50μM C3G induced changes associated with better cell survival and function, including a reduction in reactive species generation, improvement of mitochondrial membrane potential, inactivation of caspase-3 and -9, and down-regulation of the pro-apoptotic Bax protein. We further investigated the role of the phosphatidylinositol 3-kinase (PI3K)/Akt and mitogen-activated protein kinases (MAPKs) pathways with respect to the anti-apoptotic action of C3G, and our results showed that C3G could activate Akt. Additionally, C3G inactivated c-Jun N-terminal protein kinase (JNK), but not extracellular signal-regulated kinase or p38 MAPK, in glucose-stressed cells. Interestingly, JNK inhibitor enhanced the protective effect of C3G on cell survival. Our results suggest that anthocyanin C3G may exhibit hepatoprotective potential against NAFLD by promoting functional integrity and survival of hepatocytes.
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Affiliation(s)
- Xinwei Jiang
- Department of Nutrition, Henry Fok School of Food Science and Engineering, Shaoguan University, Daxue Road, Shaoguan 512005, Guangdong Province, China; Guangdong Provincial Key Laboratory of Food, Nutrition and Health; Department of Nutrition, School of Public Health, Sun Yat-Sen University (Northern Campus), Guangzhou 510080, China
| | - Xilan Tang
- Guangdong Provincial Key Laboratory of Food, Nutrition and Health; Department of Nutrition, School of Public Health, Sun Yat-Sen University (Northern Campus), Guangzhou 510080, China
| | - Peiwen Zhang
- Guangdong Provincial Key Laboratory of Food, Nutrition and Health; Department of Nutrition, School of Public Health, Sun Yat-Sen University (Northern Campus), Guangzhou 510080, China
| | - Guoling Liu
- Department of Nutrition, Henry Fok School of Food Science and Engineering, Shaoguan University, Daxue Road, Shaoguan 512005, Guangdong Province, China
| | - Honghui Guo
- Department of Nutrition, Henry Fok School of Food Science and Engineering, Shaoguan University, Daxue Road, Shaoguan 512005, Guangdong Province, China.
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Yu T, Li L, Bi Y, Liu Z, Liu H, Li Z. Erythropoietin attenuates oxidative stress and apoptosis in Schwann cells isolated from streptozotocin-induced diabetic rats. ACTA ACUST UNITED AC 2014; 66:1150-60. [PMID: 24673486 DOI: 10.1111/jphp.12244] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2014] [Accepted: 02/23/2014] [Indexed: 12/17/2022]
Abstract
OBJECTIVES High glucose-evoked oxidative stress and apoptosis within Schwann cells (SCs) are mechanisms facilitating the procession of diabetic peripheral neuropathy (DPN). Although erythropoietin (EPO) was demonstrated to have neuroprotective effects in neurodegenerative diseases, the effects of EPO on glucose-evoked oxidative stress and apoptosis of SCs remain unknown. METHODS Primary cultured SCs isolated from streptozotocin (STZ)-induced diabetic peripheral neuropathic rats and normal control rats were exposed to high or normal glucose condition with or without EPO incubation for 72 h. Cell viability, apoptotic rate, cellular reactive oxygen species (ROS) level, total glutathione (GSH) level, EPO mRNA and erythropoietin receptor (EPOR) mRNA levels were assayed. KEY FINDINGS SCs from diabetic rats showed a lower cell viability and a higher apoptotic rate. High glucose culture condition elevated ROS level and diminished total GSH level of SCs. EPO improved cell viability and decreased cell apoptotic rate of SCs. EPO also elevated total GSH level and decreased intracellular ROS level. SCs from diabetic rats exhibited higher EPO mRNA and EPOR mRNA levels than SCs from normal control rats. CONCLUSIONS The data of this study offered fresh viewpoints for interpreting the pathogenesis of DPN and novel pharmacological principles implicit in the therapeutic effect of EPO.
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Affiliation(s)
- Ting Yu
- Department of Anatomy, Shandong University School of Medicine, Shandong, China
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Zhang Z, Li J, Yang L, Chen R, Yang R, Zhang H, Cai D, Chen H. The cytotoxic role of intermittent high glucose on apoptosis and cell viability in pancreatic beta cells. J Diabetes Res 2014; 2014:712781. [PMID: 24772447 PMCID: PMC3977095 DOI: 10.1155/2014/712781] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/12/2013] [Revised: 02/02/2014] [Accepted: 02/09/2014] [Indexed: 12/30/2022] Open
Abstract
OBJECTIVES Glucose fluctuations are both strong predictor of diabetic complications and crucial factor for beta cell damages. Here we investigated the effect of intermittent high glucose (IHG) on both cell apoptosis and proliferation activity in INS-1 cells and the potential mechanisms. METHODS Cells were treated with normal glucose (5.5 mmol/L), constant high glucose (CHG) (25 mmol/L), and IHG (rotation per 24 h in 11.1 or 25 mmol/L) for 7 days. Reactive oxygen species (ROS), xanthine oxidase (XOD) level, apoptosis, cell viability, cell cycle, and expression of cyclinD1, p21, p27, and Skp2 were determined. RESULTS We found that IHG induced more significant apoptosis than CHG and normal glucose; intracellular ROS and XOD levels were more markedly increased in cells exposed to IHG. Cells treated with IHG showed significant decreased cell viability and increased cell proportion in G0/G1 phase. Cell cycle related proteins such as cyclinD1 and Skp2 were decreased significantly, but expressions of p27 and p21 were increased markedly. CONCLUSIONS This study suggested that IHG plays a more toxic effect including both apoptosis-inducing and antiproliferative effects on INS-1 cells. Excessive activation of cellular stress and regulation of cyclins might be potential mechanism of impairment in INS-1 cells induced by IHG.
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Affiliation(s)
- Zhen Zhang
- Department of Endocrinology, Zhujiang Hospital, Southern Medical University, Guangzhou 510282, China
| | - Jing Li
- Department of Endocrinology, Nanshan Affiliated Hospital of Guangdong Medical College, Shenzhen 518052, China
| | - Lei Yang
- Department of Nephrology, Zhujiang Hospital of Southern Medical University, Guangzhou 510282, China
| | - Rongping Chen
- Department of Endocrinology, Zhujiang Hospital, Southern Medical University, Guangzhou 510282, China
| | - Rui Yang
- Department of Endocrinology, Zhujiang Hospital, Southern Medical University, Guangzhou 510282, China
| | - Hua Zhang
- Department of Endocrinology, Zhujiang Hospital, Southern Medical University, Guangzhou 510282, China
| | - Dehong Cai
- Department of Endocrinology, Zhujiang Hospital, Southern Medical University, Guangzhou 510282, China
| | - Hong Chen
- Department of Endocrinology, Zhujiang Hospital, Southern Medical University, Guangzhou 510282, China
- *Hong Chen:
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Traditional chinese medicine tang-luo-ning ameliorates sciatic nerve injuries in streptozotocin-induced diabetic rats. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2013; 2013:989670. [PMID: 24288572 PMCID: PMC3830865 DOI: 10.1155/2013/989670] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/16/2013] [Accepted: 09/01/2013] [Indexed: 12/27/2022]
Abstract
Diabetic peripheral neuropathy (DPN) is a common microvascular complication of diabetes associated with high disability rate and low quality of life. Tang-Luo-Ning (TLN) is an effective traditional Chinese medicine for the treatment of DPN. To illustrate the underlying neural protection mechanisms of TLN, the effect of TLN on electrophysiology and sciatic nerve morphology was investigated in a model of streptozotocin-induced DPN, as well as the underlying mechanism. Sciatic motor nerve conduction velocity and digital sensory nerve conduction velocity were reduced in DPN and were significantly improved by TLN or α-lipoic acid at 10 and 20 weeks after streptozotocin injection. It was demonstrated that TLN intervention for 20 weeks significantly alleviated pathological injury as well as increased the phosphorylation of ErbB2, Erk, Bad (Ser112), and the mRNA expression of neuregulin 1 (Nrg1), GRB2-associated binding protein 1 (Gab1), and mammalian target of rapamycin (Mtor) in injured sciatic nerve. These novel therapeutic properties of TLN to promote Schwann cell survival may offer a promising alternative medicine for the patients to delay the progression of DPN. The underlying mechanism may be that TLN exerts neural protection effect after sciatic nerve injury through Nrg1/ErbB2→Erk/Bad Schwann cell survival signaling pathway.
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Rochette L, Ghibu S, Richard C, Zeller M, Cottin Y, Vergely C. Direct and indirect antioxidant properties of α-lipoic acid and therapeutic potential. Mol Nutr Food Res 2013; 57:114-25. [PMID: 23293044 DOI: 10.1002/mnfr.201200608] [Citation(s) in RCA: 196] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2012] [Revised: 10/03/2012] [Accepted: 11/07/2012] [Indexed: 12/19/2022]
Abstract
Diabetes has emerged as a major threat to worldwide health. The exact mechanisms underlying the disease are unknown; however, there is growing evidence that the excess generation of reactive oxygen species (ROS) associated with hyperglycemia, causes oxidative stress in a variety of tissues. In this context, various natural compounds with pleiotropic actions like α-lipoic acid (LA) are of interest, especially in metabolic diseases such as diabetes. LA, either as a dietary supplement or a therapeutic agent, modulates redox potential because of its ability to match the redox status between different subcellular compartments as well as extracellularly. Both the oxidized (disulfide) and reduced (di-thiol: dihydro-lipoic acid, DHLA) forms of LA show antioxidant properties. LA exerts antioxidant effects in biological systems through ROS quenching but also via an action on transition metal chelation. Dietary supplementation with LA has been successfully employed in a variety of in vivo models of disease associated with an imbalance of redox status: diabetes and cardiovascular diseases. The complex and intimate association between increased oxidative stress and increased inflammation in related disorders such as diabetes, makes it difficult to establish the temporal sequence of the relationship.
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Affiliation(s)
- Luc Rochette
- INSERM UMR866, Laboratoire de Physiopathologie et Pharmacologie Cardio-Métaboliques, Université de Bourgogne, Facultés de Médecine et Pharmacie, 21000 Dijon, France.
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Tarquini F, Tiribuzi R, Crispoltoni L, Porcellati S, Del Pino AM, Orlacchio A, Coata G, Arnone S, Torlone E, Cappuccini B, Di Renzo GC, Orlacchio A. Caspase 3 activation and PARP cleavage in lymphocytes from newborn babies of diabetic mothers with unbalanced glycaemic control. Cell Biochem Funct 2013; 32:87-95. [PMID: 23616419 DOI: 10.1002/cbf.2975] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2012] [Revised: 02/19/2013] [Accepted: 03/18/2013] [Indexed: 01/10/2023]
Abstract
Several epidemiological studies showed that gestational diabetes mellitus is the most frequent metabolic disorder of pregnancy, the pathogenesis of which has yet to be completely clarified. The aim of this study was to investigate the presence and processing of caspase 3 (Casp3) and poly(ADP-ribose) polymerase 1 (PARP1) in cord blood lymphocytes as markers of apoptosis in relation to glycaemic control during intrauterine life. Our results showed a specific positive correlation between the levels of active Casp3 (17-19 kDa) and the inactive form of PARP1 (89 kDa) in lymphocytes isolated from newborn babies of diabetic women with unbalanced glycaemic control, with a direct correlation between the activation of casp3 and the inactivation of PARP1, that makes lymphocytes unresponsive towards lipopolysaccharide stimulation, highlighting an altered functional response. Besides more studies are required to fully correlate the activation of the apoptotic process during the intrauterine life with the foetal health later in life, our study indicates that a cord blood lymphocyte, an easily accessible source, is informative about the activation of apoptotic stimuli in circulating cells of newborn babies in relation to the glycaemic control reached by the mother during pregnancy.
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Affiliation(s)
- F Tarquini
- Department of Obstetrics and Gynaecology, University Hospital, Perugia, Italy; GeBiSa Research Foundation, Perugia, Italy
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