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Tullii G, Gutierrez-Fernandez E, Ronchi C, Bellacanzone C, Bondi L, Criado-Gonzalez M, Lagonegro P, Moccia F, Cramer T, Mecerreyes D, Martín J, Antognazza MR. Bimodal modulation of in vitro angiogenesis with photoactive polymer nanoparticles. NANOSCALE 2023; 15:18716-18726. [PMID: 37953671 DOI: 10.1039/d3nr02743k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/14/2023]
Abstract
Angiogenesis is a fundamental process in biology, given the pivotal role played by blood vessels in providing oxygen and nutrients to tissues, thus ensuring cell survival. Moreover, it is critical in many life-threatening pathologies, like cancer and cardiovascular diseases. In this context, conventional treatments of pathological angiogenesis suffer from several limitations, including low bioavailability, limited spatial and temporal resolution, lack of specificity and possible side effects. Recently, innovative strategies have been explored to overcome these drawbacks based on the use of exogenous nano-sized materials and the treatment of the endothelial tissue with optical or electrical stimuli. Here, conjugated polymer-based nanoparticles are proposed as exogenous photo-actuators, thus combining the advantages offered by nanotechnology with those typical of optical stimulation. Light excitation can achieve high spatial and temporal resolution, while permitting minimal invasiveness. Interestingly, the possibility to either enhance (≈+30%) or reduce (up to -65%) the angiogenic capability of model endothelial cells is demonstrated, by employing different polymer beads, depending on the material type and the presence/absence of the light stimulus. In vitro results reported here represent a valuable proof of principle of the reliability and efficacy of the proposed approach and should be considered as a promising step towards a paradigm shift in therapeutic angiogenesis.
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Affiliation(s)
- Gabriele Tullii
- Center for Nano Science and Technology, Istituto Italiano di Tecnologia, Via Rubattino 81, 20134 Milano, Italy.
| | - Edgar Gutierrez-Fernandez
- POLYMAT, University of the Basque Country UPV/EHU, Paseo Manuel de Lardizabal 3, 20018 Donostia-San Sebastián, Spain
| | - Carlotta Ronchi
- Center for Nano Science and Technology, Istituto Italiano di Tecnologia, Via Rubattino 81, 20134 Milano, Italy.
| | - Christian Bellacanzone
- Center for Nano Science and Technology, Istituto Italiano di Tecnologia, Via Rubattino 81, 20134 Milano, Italy.
| | - Luca Bondi
- DiFA University of Bologna, Viale Carlo Berti Pichat 6/2 Bologna, 40127, Italy
| | - Miryam Criado-Gonzalez
- POLYMAT, University of the Basque Country UPV/EHU, Paseo Manuel de Lardizabal 3, 20018 Donostia-San Sebastián, Spain
| | - Paola Lagonegro
- Center for Nano Science and Technology, Istituto Italiano di Tecnologia, Via Rubattino 81, 20134 Milano, Italy.
| | - Francesco Moccia
- Department of Biology and Biotechnology "Lazzaro Spallanzani", University of Pavia, 27100 Pavia, Italy
| | - Tobias Cramer
- DiFA University of Bologna, Viale Carlo Berti Pichat 6/2 Bologna, 40127, Italy
| | - David Mecerreyes
- POLYMAT, University of the Basque Country UPV/EHU, Paseo Manuel de Lardizabal 3, 20018 Donostia-San Sebastián, Spain
- Ikerbasque, Basque Foundation for Science, 48013 Bilbao, Spain
| | - Jaime Martín
- POLYMAT, University of the Basque Country UPV/EHU, Paseo Manuel de Lardizabal 3, 20018 Donostia-San Sebastián, Spain
- Universidade da Coruña, Campus Industrial de Ferrol, CITENI, Campus Esteiro S/N, 15403 Ferrol, Spain
| | - Maria Rosa Antognazza
- Center for Nano Science and Technology, Istituto Italiano di Tecnologia, Via Rubattino 81, 20134 Milano, Italy.
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Wang Y, Tian Z, Li Z, Kim JC. Effects of Flavonoid Supplementation on Athletic Performance in Healthy Adults: A Systematic Review and Meta-Analysis. Nutrients 2023; 15:4547. [PMID: 37960199 PMCID: PMC10647833 DOI: 10.3390/nu15214547] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2023] [Revised: 10/23/2023] [Accepted: 10/24/2023] [Indexed: 11/15/2023] Open
Abstract
Flavonoids, known for their antioxidant properties, can prevent reactive oxygen species (ROS) and influence athletic performance through various physiological and metabolic mechanisms. However, there are conflicting results after summarizing and analyzing the relevant literature. Hence, it is warranted to evaluate the overall impact of flavonoids on athletic performance in healthy adults based on a comprehensive and systematic review and meta-analysis. After searching four databases for literature published since their respective establishments until February 2023 and conducting publication bias and quality assessments, a total of 22 studies were ultimately included. The names and doses of flavonoids, various outcome measurements, as well as types of training, were extracted from included studies. The athletic performance outcomes from the included studies were categorized into 'performance tests' and 'exercise tolerance,' depending on the type of training undertaken. Several statistical results, such as pooled effect size (ES), among others, were implemented by meta-analysis using the random effects model. The results of meta-analysis suggest that there is currently sufficient evidence (ES = -0.28; 95% confidence interval (CI): [-0.50, -0.07]; p = 0.01 and ES = 0.23; 95% CI: [0.07, 0.39]; p = 0.005) to support the notion that flavonoid supplementation enhanced athletic performance in performance tests and exercise tolerance. In addition, among the subgroups, nonsignificant results were observed for athletes (p = 0.28) and acute supplementation (p = 0.41) in performance tests, as well as athletes (p = 0.57) and acute supplementation (p = 0.44) in exercise tolerance. Meanwhile, significant results were found for non-athletes (p = 0.04) and long-term supplementation (p = 0.02) in performance tests, as well as non-athletes (p = 0.005) in performance tests and long-term supplementation (p = 0.006) in exercise tolerance. The nonsignificant results were likely due to the limitation in the number of related papers, sample sizes, optimal dosage, duration, type of flavonoids, and other factors. Therefore, future research should focus on further investigating these relationships with larger sample sizes, optimal dosage, duration, and type of flavonoids to provide more robust conclusions.
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Affiliation(s)
| | | | | | - Jae Cheol Kim
- Department of Sport Science, Jeonbuk National University, Jeonju 54896, Republic of Korea; wangying890922-@jbnu.ac.kr (Y.W.); (Z.T.); (Z.L.)
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Krause M, De Vito G. Type 1 and Type 2 Diabetes Mellitus: Commonalities, Differences and the Importance of Exercise and Nutrition. Nutrients 2023; 15:4279. [PMID: 37836562 PMCID: PMC10574155 DOI: 10.3390/nu15194279] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2023] [Accepted: 09/16/2023] [Indexed: 10/15/2023] Open
Abstract
Diabetes mellitus represents a group of physiological dysfunctions characterized by hyperglycaemia resulting directly from insulin resistance (in the case of type 2 diabetes mellitus-T2DM), inadequate insulin secretion/production, or excessive glucagon secretion (in type 1 diabetes mellitus-T1DM) [...].
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Affiliation(s)
- Maurício Krause
- Laboratório de Inflamação, Metabolismo e Exercício (LAPIMEX) e Laboratório de Fisiologia Celular, Departamento de Fisiologia, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre 90035-003, RS, Brazil
| | - Giuseppe De Vito
- Neuromuscular Physiology Laboratory, Department of Biomedical Sciences, University of Padova, 35131 Padova, Italy;
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Ma Y, Liu H, Wang Y, Xuan J, Gao X, Ding H, Ma C, Chen Y, Yang Y. Roles of physical exercise-induced MiR-126 in cardiovascular health of type 2 diabetes. Diabetol Metab Syndr 2022; 14:169. [PMID: 36376958 PMCID: PMC9661802 DOI: 10.1186/s13098-022-00942-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Accepted: 11/04/2022] [Indexed: 11/16/2022] Open
Abstract
Although physical activity is widely recommended for preventing and treating cardiovascular complications of type 2 diabetes mellitus (T2DM), the underlying mechanisms remain unknown. MicroRNA-126 (miR-126) is an angiogenetic regulator abundant in endothelial cells (ECs) and endothelial progenitor cells (EPCs). It is primarily involved in angiogenesis, inflammation and apoptosis for cardiovascular protection. According to recent studies, the levels of miR-126 in the myocardium and circulation are affected by exercise protocol. High-intensity interval training (HIIT) or moderate-and high-intensity aerobic exercise, whether acute or chronic, can increase circulating miR-126 in healthy adults. Chronic aerobic exercise can effectively rescue the reduction of myocardial and circulating miR-126 and vascular endothelial growth factor (VEGF) in diabetic mice against diabetic vascular injury. Resistance exercise can raise circulating VEGF levels, but it may have a little influence on circulating miR-126. The Several targets of miR-126 have been suggested for cardiovascular fitness, such as sprouty-related EVH1 domain-containing protein 1 (SPRED1), phosphoinositide-3-kinase regulatory subunit 2 (PIK3R2), vascular cell adhesion molecule 1 (VCAM1), high-mobility group box 1 (HMGB1), and tumor necrosis factor receptor-associated factor 7 (TRAF7). Here, we present a comprehensive review of the roles of miR-126 and its downstream proteins as exercise mechanisms, and propose that miR-126 can be applied as an exercise indicator for cardiovascular prescriptions and as a preventive or therapeutic target for cardiovascular complications in T2DM.
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Affiliation(s)
- Yixiao Ma
- Graduate School, Wuhan Sports University, Wuhan, 430079, China
| | - Hua Liu
- Laboratory of Physical Fitness Monitoring & Chronic Disease Intervention, Wuhan Sports University, Wuhan, 430079, China
| | - Yong Wang
- Laboratory of Physical Fitness Monitoring & Chronic Disease Intervention, Wuhan Sports University, Wuhan, 430079, China
| | - Junjie Xuan
- Graduate School, Wuhan Sports University, Wuhan, 430079, China
| | - Xing Gao
- Graduate School, Wuhan Sports University, Wuhan, 430079, China
| | - Huixian Ding
- Graduate School, Wuhan Sports University, Wuhan, 430079, China
| | - Chunlian Ma
- Laboratory of Physical Fitness Monitoring & Chronic Disease Intervention, Wuhan Sports University, Wuhan, 430079, China
| | - Yanfang Chen
- Department of Pharmacology & Toxicology, Boonshoft School of Medicine, Wright State University, Dayton, OH, 45435, USA
| | - Yi Yang
- Hubei Key Laboratory of Exercise Training and Monitoring, Wuhan Sports University, Wuhan, 430079, China.
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Sex Differences in the Relation between Comorbidities and Prognosis in Hospitalized Patients with COVID-19. Interdiscip Perspect Infect Dis 2022; 2022:8267056. [PMID: 36033355 PMCID: PMC9410950 DOI: 10.1155/2022/8267056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Revised: 06/30/2022] [Accepted: 08/03/2022] [Indexed: 11/17/2022] Open
Abstract
Purpose. There is a lack of information of the difference in sex-aggregated prevalence of comorbid noncommunicable disease (NCD) in patients hospitalized with COVID-19 in Iran. This study aimed to evaluate sex differences in the relation between medical comorbidities and subsequent death in patients hospitalized with COVID-19. Methods. All subsequently hospitalized patients with a diagnosis of moderate to severe COVID-19 since February 19th to June 14th, 2020, in Isfahan, Iran, were recruited in the ongoing I-CORE Registry. Real-time reverse-transcription polymerase chain reaction (RT-PCR) testing was done upon admission. Data on preexisting comorbid NCDs including hypertension, coronary heart disease (CHD), diabetes mellitus (DM), cancers, chronic renal disease (CRD), and chronic respiratory disease were collected through self-reported questionnaires. Results. Overall, 12,620 individuals were enrolled in this registry of which 4,356 were positive for the COVID-19 RT-PCR test. In the whole population, in women, DM, hypertension, and CHD, and in men, DM, CHD, and hypertension were, respectively, the most frequent comorbidities. The frequency of at least one NCD did not differ between men and women, but a greater proportion of women had two or more NCDs. Increasing the number of comorbidities was associated with higher death frequency and mortality risk in the unadjusted model but remained no longer significant after adjustment for age. There was no statistically significant difference in this regard between men and women. Conclusion. Overall, we found that DM, hypertension, and CHD were the most frequent comorbidities. Although comorbidities were more frequent among women, mortality risk did not significantly differ between men and women.
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Prasad M K, Mohandas S, Ramkumar KM. Role of ER stress inhibitors in the management of diabetes. Eur J Pharmacol 2022; 922:174893. [DOI: 10.1016/j.ejphar.2022.174893] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2022] [Revised: 03/07/2022] [Accepted: 03/09/2022] [Indexed: 12/14/2022]
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Flensted-Jensen M, Gram M, Dela F, Helge JW, Larsen S. Six weeks of high intensity cycle training reduces H 2O 2 emission and increases antioxidant protein levels in obese adults with risk factors for type 2 diabetes. Free Radic Biol Med 2021; 173:1-6. [PMID: 34273538 DOI: 10.1016/j.freeradbiomed.2021.07.020] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/04/2021] [Revised: 07/07/2021] [Accepted: 07/14/2021] [Indexed: 11/16/2022]
Abstract
Obesity has been associated with increased production of reactive oxygen species (ROS), which may be involved in the development of cardiovascular disease and type 2 diabetes (T2D). Endurance exercise lowers ROS production and increases antioxidant capacity in muscle cells, but it is currently unknown whether high intensity interval training (HIT) elicits the same effects. Twelve sedentary obese subjects at risk of developing T2D took part in a six-week intervention, performing three HIT sessions per week (five 1-min sets of high-intensity cycling (125% of VO2peak), with 90 s recovery in between sets). Muscle biopsies were obtained for assessment of ROS production (H2O2 emission), mitochondrial respiratory capacity, and antioxidant protein levels before and after the intervention. H2O2 emission decreased 60.4% after the intervention (Succinate 3 mmol・l-1), concurrent with a 35.1% increase in protein levels of the antioxidant manganese superoxide dismutase (MnSOD) and a trend towards increased levels of the antioxidant catalase (p = 0.06, 72.9%). These findings were accompanied by a 19% increased mitochondrial respiratory capacity (CI + II), a 6.9% increased VO2peak and a 1.7% lower body fat percentage. These effects were achieved after just 15 min of high-intensity work and 40 min of total time spent per week. Overall, this suggests that a relatively small amount of HIT is sufficient to induce beneficial effects on ROS production and antioxidant status in muscle cells, which may lower oxidative stress and potentially protect against the development of cardiovascular disease.
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Affiliation(s)
- Mathias Flensted-Jensen
- Xlab, Center for Healthy Aging, Department of Biomedical Sciences, Faculty of Health Sciences, University of Copenhagen, DK-2200, Copenhagen, Denmark.
| | - Martin Gram
- Xlab, Center for Healthy Aging, Department of Biomedical Sciences, Faculty of Health Sciences, University of Copenhagen, DK-2200, Copenhagen, Denmark.
| | - Flemming Dela
- Xlab, Center for Healthy Aging, Department of Biomedical Sciences, Faculty of Health Sciences, University of Copenhagen, DK-2200, Copenhagen, Denmark; Department of Geriatrics, Bispebjerg University Hospital, Copenhagen, Denmark.
| | - Jørn Wulff Helge
- Xlab, Center for Healthy Aging, Department of Biomedical Sciences, Faculty of Health Sciences, University of Copenhagen, DK-2200, Copenhagen, Denmark.
| | - Steen Larsen
- Xlab, Center for Healthy Aging, Department of Biomedical Sciences, Faculty of Health Sciences, University of Copenhagen, DK-2200, Copenhagen, Denmark; Clinical Research Centre, Medical University of Bialystok, Bialystok, Poland.
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Vogt ÉL, Von Dentz MC, Rocha DS, Argenta Model JF, Kowalewski LS, de Souza SK, Girelli VDO, de Bittencourt PIH, Friedman R, Krause M, Vinagre AS. Metabolic and Molecular Subacute Effects of a Single Moderate-Intensity Exercise Bout, Performed in the Fasted State, in Obese Male Rats. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:ijerph18147543. [PMID: 34299993 PMCID: PMC8307452 DOI: 10.3390/ijerph18147543] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/06/2021] [Revised: 07/09/2021] [Accepted: 07/12/2021] [Indexed: 01/13/2023]
Abstract
Introduction and objectives: Obesity represents a major global public health problem. Its etiology is multifactorial and includes poor dietary habits, such as hypercaloric and hyperlipidic diets (HFDs), physical inactivity, and genetic factors. Regular exercise is, per se, a tool for the treatment and prevention of obesity, and recent studies suggest that the beneficial effects of exercise can be potentiated by the fasting state, thus potentially promoting additional effects. Despite the significant number of studies showing results that corroborate such hypothesis, very few have evaluated the effects of fasted-state exercise in overweight/obese populations. Therefore, the aim of this study was to evaluate the subacute effects (12 h after conclusion) of a single moderate-intensity exercise bout, performed in either a fed or an 8 h fasted state, on serum profile, substrate-content and heat shock pathway–related muscle protein immunocontent in obese male rats. Methods: Male Wistar rats received a modified high-fat diet for 12 weeks to induce obesity and insulin resistance. The animals were allocated to four groups: fed rest (FER), fed exercise (FEE), fasted rest (FAR) and fasted exercise (FAE). The exercise protocol was a 30 min session on a treadmill, with an intensity of 60% of VO2max. The duration of the fasting period was 8 h prior to the exercise session. After a 12 h recovery, the animals were killed and metabolic parameters of blood, liver, heart, gastrocnemius and soleus muscles were evaluated, as well as SIRT1 and HSP70 immunocontent in the muscles. Results: HFD induced obesity and insulin resistance. Soleus glycogen concentration decreased in the fasted groups and hepatic glycogen decreased in the fed exercise group. The combination of exercise and fasting promoted a decreased concentration of serum total cholesterol and triglycerides. In the heart, combination fasting plus exercise was able to decrease triglycerides to control levels. In the soleus muscle, both fasting and fasting plus exercise were able to decrease triglyceride concentrations. In addition, heat shock protein 70 and sirtuin 1 immunocontent increased after exercise in the gastrocnemius and soleus muscles. Conclusions: An acute bout of moderate intensity aerobic exercise, when realized in fasting, may induce, in obese rats with metabolic dysfunctions, beneficial adaptations to their health, such as better biochemical and molecular adaptations that last for at least 12 h. Considering the fact that overweight/obese populations present an increased risk of cardiovascular events/diseases, significant reductions in such plasma markers of lipid metabolism are an important achievement for these populations.
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Affiliation(s)
- Éverton Lopes Vogt
- Department of Physiology, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre 90050-170, RS, Brazil; (É.L.V.); (M.C.V.D.); (D.S.R.); (J.F.A.M.); (S.K.d.S.); (V.d.O.G.); (A.S.V.)
| | - Maiza Cristina Von Dentz
- Department of Physiology, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre 90050-170, RS, Brazil; (É.L.V.); (M.C.V.D.); (D.S.R.); (J.F.A.M.); (S.K.d.S.); (V.d.O.G.); (A.S.V.)
| | - Débora Santos Rocha
- Department of Physiology, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre 90050-170, RS, Brazil; (É.L.V.); (M.C.V.D.); (D.S.R.); (J.F.A.M.); (S.K.d.S.); (V.d.O.G.); (A.S.V.)
| | - Jorge Felipe Argenta Model
- Department of Physiology, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre 90050-170, RS, Brazil; (É.L.V.); (M.C.V.D.); (D.S.R.); (J.F.A.M.); (S.K.d.S.); (V.d.O.G.); (A.S.V.)
| | - Lucas Stahlhöfer Kowalewski
- Laboratory of Inflammation, Metabolism and Exercise Research (LAPIMEX) and Laboratory of Cellular Physiology, Department of Physiology, Institute of Basic Health Sciences, Universidade Federal do Rio Grande do Sul, Porto Alegre 90050-170, RS, Brazil; (L.S.K.); (P.I.H.d.B.J.)
| | - Samir Khal de Souza
- Department of Physiology, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre 90050-170, RS, Brazil; (É.L.V.); (M.C.V.D.); (D.S.R.); (J.F.A.M.); (S.K.d.S.); (V.d.O.G.); (A.S.V.)
| | - Vitória de Oliveira Girelli
- Department of Physiology, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre 90050-170, RS, Brazil; (É.L.V.); (M.C.V.D.); (D.S.R.); (J.F.A.M.); (S.K.d.S.); (V.d.O.G.); (A.S.V.)
| | - Paulo Ivo Homem de Bittencourt
- Laboratory of Inflammation, Metabolism and Exercise Research (LAPIMEX) and Laboratory of Cellular Physiology, Department of Physiology, Institute of Basic Health Sciences, Universidade Federal do Rio Grande do Sul, Porto Alegre 90050-170, RS, Brazil; (L.S.K.); (P.I.H.d.B.J.)
| | - Rogério Friedman
- Endocrine and Metabolic Unit, Hospital de Clinicas de Porto Alegre, Universidade Federal do Rio Grande do Sul, Porto Alegre 90040-060, RS, Brazil;
- Graduate Program in Medical Sciences: Endocrinology, Department of Internal Medicine, Faculty of Medicine, Universidade Federal do Rio Grande do Sul, Porto Alegre 90035-903, RS, Brazil
| | - Mauricio Krause
- Laboratory of Inflammation, Metabolism and Exercise Research (LAPIMEX) and Laboratory of Cellular Physiology, Department of Physiology, Institute of Basic Health Sciences, Universidade Federal do Rio Grande do Sul, Porto Alegre 90050-170, RS, Brazil; (L.S.K.); (P.I.H.d.B.J.)
- Correspondence: ; Tel.: +55-51-33083623
| | - Anapaula Sommer Vinagre
- Department of Physiology, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre 90050-170, RS, Brazil; (É.L.V.); (M.C.V.D.); (D.S.R.); (J.F.A.M.); (S.K.d.S.); (V.d.O.G.); (A.S.V.)
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de Farias JM, Dos Santos Tramontin N, Pereira EV, de Moraes GL, Furtado BG, Tietbohl LTW, Da Costa Pereira B, Simon KU, Muller AP. Physical Exercise Training Improves Judgment and Problem-Solving and Modulates Serum Biomarkers in Patients with Alzheimer's Disease. Mol Neurobiol 2021; 58:4217-4225. [PMID: 33963521 DOI: 10.1007/s12035-021-02411-z] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2021] [Accepted: 04/28/2021] [Indexed: 01/01/2023]
Abstract
Alzheimer's disease (AD) is characterized by progressive impairment of memory, with an etiology involving oxidative stress and inflammation. Exercise training is a safe, efficacious, and economic approach to manage neurodegenerative diseases. In AD, the biomarkers of oxidative damage to lipids, proteins, and DNA are elevated. In the present study, we aimed to evaluate whether exercise is effective in patients with AD by assessing the serum biomarkers associated with the redox status, neurotrophin levels, and inflammatory system. This nonrandomized clinical study (n = 15) involved 22 training sessions performed twice a week (60 min/session) in patients diagnosed with AD. The cognitive and self-awareness tests were performed 48 h before and after the physical training session. In patients with AD, physical training significantly improved the judgment and problem-solving domains of the memory score; however, general mental health, memory, orientation, and home/hobby domains were improved slightly, and the neurotrophin levels remained unaltered. Significantly, the markers of protein integrity also increased following exercise. Furthermore, catalase activity and ROS levels decreased, nitrite levels increased, and interleukin-4 level increased following physical training in patients with AD. Although proinflammatory cytokines remained unaltered, the levels of neuron-specific enolase, a marker of neuronal damage, decreased following exercise training in these patients. In conclusion, physical exercise training could be a safe and effective method for blocking the AD progression and improving the antioxidant capacity and anti-inflammatory system, whereas certain assessed biomarkers could be utilized to monitor AD therapy.
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Affiliation(s)
- Joni Marcio de Farias
- Health Promotion Research and Study Group, University of Extremo Sul Catarinense, Criciúma, SC, Brazil
| | | | - Eduarda Valim Pereira
- Health Promotion Research and Study Group, University of Extremo Sul Catarinense, Criciúma, SC, Brazil
| | | | - Beatriz Giusti Furtado
- Health Promotion Research and Study Group, University of Extremo Sul Catarinense, Criciúma, SC, Brazil
| | | | - Bárbara Da Costa Pereira
- Laboratory of Biomedicine Translational, University of Extremo Sul Catarinense, Criciúma, SC, 88040900, Brazil
| | - Kellen Ugioni Simon
- Laboratory of Biomedicine Translational, University of Extremo Sul Catarinense, Criciúma, SC, 88040900, Brazil
| | - Alexandre Pastoris Muller
- Pharmacology Department, Federal University of Santa Catarina, Florianópolis, SC, Brazil. .,Laboratory of Biomedicine Translational, University of Extremo Sul Catarinense, Criciúma, SC, 88040900, Brazil. .,Postgraduate Program in Pharmacology, Federal University of Santa Catarina-UFSC, Florianópolis, SC, 88040900, Brazil.
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A novel quinolinylmethyl substituted ethylenediamine compound exerts anti-cancer effects via stimulating the accumulation of reactive oxygen species and NO in hepatocellular carcinoma cells. Eur J Pharmacol 2020; 885:173497. [PMID: 32841641 DOI: 10.1016/j.ejphar.2020.173497] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2020] [Revised: 08/13/2020] [Accepted: 08/21/2020] [Indexed: 12/24/2022]
Abstract
Hepatocellular carcinoma (HCC) is one of the leading causes of cancer-related deaths worldwide. Owing to the limitations in the current therapeutic strategies for treating HCC, development of novel chemotherapeutic drugs is urgently needed. In the present study, we found that QQM, a newly-synthesized quinolinylmethyl substituted ethylenediamine compound, exhibited anti-HCC effects both in vitro and in vivo. QQM inhibited HCC cell growth and induced G0/G1-phase cell cycle arrest and apoptosis in a dose-dependent manner. Our results showed that QQM acted by significantly increasing intracellular reactive oxygen species in HCC cells, which led to cell apoptosis and growth inhibition. Furthermore, QQM treatment resulted in an accumulation of reactive nitric oxide (NO) in HCC cells, and introduction of a NO scavenger, carboxy-PTIO, largely attenuated QQM-induced cytotoxicity. Finally, we found that QQM inhibited growth and induced apoptosis of HCC xenograft tumors in vivo. Taken together, our results indicated that QQM exerted anti-HCC effects by inducing reactive oxygen species and NO accumulation in HCC cells. Thus, QQM exhibits the qualities of a novel, promising anti-tumor candidate for the treatment of HCC.
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Krause M, Gerchman F, Friedman R. Coronavirus infection (SARS-CoV-2) in obesity and diabetes comorbidities: is heat shock response determinant for the disease complications? Diabetol Metab Syndr 2020; 12:63. [PMID: 32690985 PMCID: PMC7364287 DOI: 10.1186/s13098-020-00572-w] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Accepted: 07/13/2020] [Indexed: 01/08/2023] Open
Abstract
Chronic inflammation is involved in the pathogenesis of several metabolic diseases, such as obesity and type 2 diabetes mellitus (T2DM). With the recent worldwide outbreak of coronavirus disease (SARS-CoV-2), it has been observed that individuals with these metabolic diseases are more likely to develop complications, increasing the severity of the disease and a poorer outcome. Coronavirus infection leads to the activation of adaptive and innate immune responses, resulting in massive inflammation (to so called cytokine storm), which in turn can lead to damage to various tissues, septic shock and multiple organ failure. Recent evidence suggests that the common link between metabolic diseases and SARS-CoV-2 is the inflammatory response (chronic/low-grade for metabolic diseases and acute/intense in coronavirus infection). However, the ability of the infected individuals to resolve the inflammation has not yet been explored. The heat shock response (HSR), an important anti-inflammatory pathway, is reduced in patients with metabolic diseases and, consequently, may impair inflammation resolution and control in patients with SARS-CoV-2, thus enabling its amplification and propagation through all tissues. Herein, we present a new hypothesis that aims to explain the increased severity of SARS-CoV-2 infection in people with metabolic diseases, and the possible benefits of HSR-inducing therapies to improve the inflammatory profile in these patients.
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Affiliation(s)
- Mauricio Krause
- Laboratory of Inflammation, Metabolism and Exercise Research (LAPIMEX) and Laboratory of Cellular Physiology, Department of Physiology, Institute of Basic Health Sciences, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS Brazil
| | - Fernando Gerchman
- Endocrine and Metabolic Unit, Hospital de Clinicas de Porto Alegre, Porto Alegre, RS Brazil
- Graduate Program in Medical Sciences: Endocrinology, Department of Internal Medicine, Faculty of Medicine, Porto Alegre, Brazil
| | - Rogério Friedman
- Endocrine and Metabolic Unit, Hospital de Clinicas de Porto Alegre, Porto Alegre, RS Brazil
- Graduate Program in Medical Sciences: Endocrinology, Department of Internal Medicine, Faculty of Medicine, Porto Alegre, Brazil
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12
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Sabouri M, Norouzi J, Zarei Y, Sangani MH, Hooshmand Moghadam B. Comparing High-Intensity Interval Training (HIIT) and Continuous Training on Apelin, APJ, NO, and Cardiotrophin-1 in Cardiac Tissue of Diabetic Rats. J Diabetes Res 2020; 2020:1472514. [PMID: 32908933 PMCID: PMC7474749 DOI: 10.1155/2020/1472514] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Revised: 08/18/2020] [Accepted: 08/20/2020] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND AND AIMS Exercise activity is an important method for managing type 2 diabetes. This investigation examined the HIIT and continuous training on apelin, APJ receptor, NO, and cardiotrophin-1 in the cardiac tissue of diabetic rats. METHODS The animals were categorized into 3 groups of HIIT, continuous (CO), and control (C) (all animals were sacrificed immediately and 2 days after exercise training period). Rats underwent the treadmill exercise program either HIIT (12 bouts at 90-95% of VO2 max with 60 s rest at 50% of VO2 max) or CO (60-65% VO2 max for 40 min). Protocols performed 5 days per week for 8 weeks. Apelin, APJ receptor, NO, and cardiotrophin-1 protein expressions were measured using the Western blotting method in the left ventricle. RESULTS Immediately after HIIT and CO exercise protocols, apelin and CT-1 protein showed a significant difference in contrast by the C-0 group (p < 0.01). However, NO values were substantially higher in HIIT-0 compared to C-0 and CO-0 groups rats (p < 0.01). After two days of exercise protocols, apelin and NO protein showed a significant increase in HIIT and CO groups in contrast to the C animals (p < 0.01). Moreover, APJ and CT-1 protein significantly upregulated in CO-2 and HIIT-2 compared to the other groups (p < 0.01). CONCLUSIONS This study indicates that exercise training, despite the type, is an efficient method to modify apelin, APJ receptor, NO, and cardiotrophin-1 values in animals with type 2 diabetes.
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Affiliation(s)
- Mostafa Sabouri
- Department of Exercise Physiology & Health Science, University of Tehran, Tehran, Iran
- Oxygen Sports Medical Center, Tehran, Iran
| | - Javad Norouzi
- Department of Exercise Physiology & Health Science, University of Tehran, Tehran, Iran
- Oxygen Sports Medical Center, Tehran, Iran
| | - Yashar Zarei
- Department of Exercise Physiology & Health Science, University of Tehran, Tehran, Iran
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13
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Wang SQ, Li D, Yuan Y. Long-term moderate intensity exercise alleviates myocardial fibrosis in type 2 diabetic rats via inhibitions of oxidative stress and TGF-β1/Smad pathway. J Physiol Sci 2019; 69:861-873. [PMID: 31392590 PMCID: PMC10716963 DOI: 10.1007/s12576-019-00696-3] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2019] [Accepted: 07/15/2019] [Indexed: 12/25/2022]
Abstract
Exercise has an effect on the reduction of myocardial fibrosis in diabetic rats as previously reported, in which oxidative stress and the TGF-β1/Smad signaling pathway may play key roles. There is little direct experimental evidence that exercise alleviates myocardial fibrosis in type 2 diabetes mellitus (T2DM). Here we established a type 2 diabetic model by using streptozotocin and a high-fat diet. Rats were divided into groups of normal control (NC), T2DM and T2DM plus exercise (T2DME). The T2DME group received further treadmill training at moderate intensity for 8 weeks. Histological and biochemical methods were used to detect the benefits of exercise to T2DM. Results showed that the weight of rats in the T2DM group dropped dramatically, along with significant increases in blood glucose, myocardial fibrosis and oxidative stress, associated with upregulated expression of factors of myocardial fibrosis, except Smad7. Exercise largely reversed T2DM-induced alterations in factors of myocardial fibrosis, including suppressing expression of MMP-2, CTGF, TGF-β1, p-Smad2 and p-Smad3, and increased expression of TIMP-1 and Smad7. Therefore, exercise might be considered an alternative therapeutic remedy for diabetic cardiomyopathy.
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Affiliation(s)
- Shi-Qiang Wang
- Physical Education College, Hunan University of Technology, Zhuzhou, Hunan, China
| | - Dan Li
- Physical Education College, Hunan University of Technology, Zhuzhou, Hunan, China
| | - Yang Yuan
- School of Physical Education, Qingdao University, 308 Ningxia Road, Qingdao, 266071, Shandong, China.
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14
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Ježek P, Jabůrek M, Plecitá-Hlavatá L. Contribution of Oxidative Stress and Impaired Biogenesis of Pancreatic β-Cells to Type 2 Diabetes. Antioxid Redox Signal 2019; 31:722-751. [PMID: 30450940 PMCID: PMC6708273 DOI: 10.1089/ars.2018.7656] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/15/2018] [Accepted: 11/05/2018] [Indexed: 12/14/2022]
Abstract
Significance: Type 2 diabetes development involves multiple changes in β-cells, related to the oxidative stress and impaired redox signaling, beginning frequently by sustained overfeeding due to the resulting lipotoxicity and glucotoxicity. Uncovering relationships among the dysregulated metabolism, impaired β-cell "well-being," biogenesis, or cross talk with peripheral insulin resistance is required for elucidation of type 2 diabetes etiology. Recent Advances: It has been recognized that the oxidative stress, lipotoxicity, and glucotoxicity cannot be separated from numerous other cell pathology events, such as the attempted compensation of β-cell for the increased insulin demand and dynamics of β-cell biogenesis and its "reversal" at dedifferentiation, that is, from the concomitantly decreasing islet β-cell mass (also due to transdifferentiation) and low-grade islet or systemic inflammation. Critical Issues: At prediabetes, the compensation responses of β-cells, attempting to delay the pathology progression-when exaggerated-set a new state, in which a self-checking redox signaling related to the expression of Ins gene expression is impaired. The resulting altered redox signaling, diminished insulin secretion responses to various secretagogues including glucose, may lead to excretion of cytokines or chemokines by β-cells or excretion of endosomes. They could substantiate putative stress signals to the periphery. Subsequent changes and lasting glucolipotoxicity promote islet inflammatory responses and further pathology spiral. Future Directions: Should bring an understanding of the β-cell self-checking and related redox signaling, including the putative stress signal to periphery. Strategies to cure or prevent type 2 diabetes could be based on the substitution of the "wrong" signal by the "correct" self-checking signal.
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Affiliation(s)
- Petr Ježek
- Department of Mitochondrial Physiology, Institute of Physiology of the Czech Academy of Sciences, Prague, Czech Republic
| | - Martin Jabůrek
- Department of Mitochondrial Physiology, Institute of Physiology of the Czech Academy of Sciences, Prague, Czech Republic
| | - Lydie Plecitá-Hlavatá
- Department of Mitochondrial Physiology, Institute of Physiology of the Czech Academy of Sciences, Prague, Czech Republic
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15
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Protective Effects of Caffeic Acid Phenethyl Ester (CAPE) and Novel Cape Analogue as Inducers of Heme Oxygenase-1 in Streptozotocin-Induced Type 1 Diabetic Rats. Int J Mol Sci 2019; 20:ijms20102441. [PMID: 31108850 PMCID: PMC6567686 DOI: 10.3390/ijms20102441] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2019] [Revised: 05/14/2019] [Accepted: 05/15/2019] [Indexed: 12/16/2022] Open
Abstract
Type 1 diabetes mellitus (T1D) is a chronic autoimmune disease resulting in the destruction of insulin producing β-cells of the pancreas, with consequent insulin deficiency and excessive glucose production. Hyperglycemia results in increased levels of reactive oxygen species (ROS) and nitrogen species (RNS) with consequent oxidative/nitrosative stress and tissue damage. Oxidative damage of the pancreatic tissue may contribute to endothelial dysfunction associated with diabetes. The aim of the present study was to investigate if the potentially protective effects of phenethyl ester of caffeic acid (CAPE), a natural phenolic compound occurring in a variety of plants and derived from honeybee hive propolis, and of a novel CAPE analogue, as heme oxygenase-1 (HO-1) inducers, could reduce pancreatic oxidative damage induced by excessive amount of glucose, affecting the nitric oxide synthase/dimethylarginine dimethylaminohydrolase (NOS/DDAH) pathway in streptozotocin-induced type 1 diabetic rats. Our data demonstrated that inducible nitric oxide synthase/gamma-Glutamyl-cysteine ligase (iNOS/GGCL) and DDAH dysregulation may play a key role in high glucose mediated oxidative stress, whereas HO-1 inducers such as CAPE or its more potent derivatives may be useful in diabetes and other stress-induced pathological conditions.
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Bahrami D, Mozaffari-Khosravi H, Zavar-Reza J. The effect of oral L-arginine supplementation on lipid profile, glycemic status, and insulin resistance in patients with metabolic syndrome: A randomized, double-blind, placebo-controlled trial. MEDITERRANEAN JOURNAL OF NUTRITION AND METABOLISM 2019. [DOI: 10.3233/mnm-180233] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
- Davood Bahrami
- Department of Nutrition, School of Public Health, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
| | - Hassan Mozaffari-Khosravi
- Department of Nutrition, School of Public Health, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
- Yazd Diabetic Research Center, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
| | - Javad Zavar-Reza
- Department of Biochemistry, Faculty of Medicine, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
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17
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Kemps H, Kränkel N, Dörr M, Moholdt T, Wilhelm M, Paneni F, Serratosa L, Ekker Solberg E, Hansen D, Halle M, Guazzi M. Exercise training for patients with type 2 diabetes and cardiovascular disease: What to pursue and how to do it. A Position Paper of the European Association of Preventive Cardiology (EAPC). Eur J Prev Cardiol 2019; 26:709-727. [PMID: 30642190 DOI: 10.1177/2047487318820420] [Citation(s) in RCA: 61] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Patients with type 2 diabetes mellitus suffer from dysregulation of a plethora of cardiovascular and metabolic functions, including dysglycaemia, dyslipidaemia, arterial hypertension, obesity and a reduced cardiorespiratory fitness. Exercise training has the potential to improve many of these functions, such as insulin sensitivity, lipid profile, vascular reactivity and cardiorespiratory fitness, particularly in type 2 diabetes mellitus patients with cardiovascular comorbidities, such as patients that suffered from an acute myocardial infarction, or after a coronary intervention such as percutaneous coronary intervention or coronary artery bypass grafting. The present position paper aims to provide recommendations for prescription of exercise training in patients with both type 2 diabetes mellitus and cardiovascular disease. The first part discusses the relevance and practical applicability of treatment targets that may be pursued, and failure to respond to these targets. The second part provides recommendations on the contents and methods to prescribe exercise training tailored to these treatment targets as well as to an optimal preparation and dealing with barriers and risks specific to type 2 diabetes mellitus and cardiac comorbidity.
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Affiliation(s)
- Hareld Kemps
- 1 Department of Cardiology, Máxima Medical Centre, Veldhoven, The Netherlands
| | - Nicolle Kränkel
- 2 Charité - Universitätsmedizin Berlin, Klinik für Kardiologie, Campus Benjamin Steglitz, Germany.,3 DZHK (German Centre for Cardiovascular Research), partner site Berlin, Germany
| | - Marcus Dörr
- 4 University Medicine Greifswald, Department of Internal Medicine B, Germany.,5 DZHK (German Centre for Cardiovascular Research), partner site Greifswald, Germany
| | - Trine Moholdt
- 6 Department of Circulation and Medical Imaging, Norwegian University of Science and Technology Trondheim, Norway.,7 St Olav's Hospital, Trondheim, Norway
| | - Matthias Wilhelm
- 8 Department of Cardiology, Bern University Hospital and University of Bern, Switzerland
| | - Francesco Paneni
- 9 Centre for Molecular Cardiology and Cardiology, Zurich University Hospital, University of Zurich, Switzerland
| | - Luis Serratosa
- 10 Hospital Universitario Quironsalud, Madrid, Spain.,11 Ripoll & De Prado Sport Clinic, FIFA Medical Centre of Excellence, Murcia, Spain
| | | | - Dominique Hansen
- 13 Hasselt University, Faculty of Rehabilitation Sciences, Diepenbeek, Belgium.,14 Heart Centre Hasselt, Jessa Hospital, Belgium
| | - Martin Halle
- 15 Technical University Munich, Department of Prevention, Rehabilitation and Sports Medicine, Germany.,16 DZHK (German Centre for Cardiovascular Research), partner site Munich, Germany
| | - Marco Guazzi
- 17 University Cardiology Department and Heart Failure Unit and Cardiopulmonary Laboratory, Cardiology, I.R.C.C.S., Milan, Italy.,18 Policlinico San Donato University Hospital, Milan, Italy
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18
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Association of l-Arginine Supplementation with Markers of Endothelial Function in Patients with Cardiovascular or Metabolic Disorders: A Systematic Review and Meta-Analysis. Nutrients 2018; 11:nu11010015. [PMID: 30577559 PMCID: PMC6357192 DOI: 10.3390/nu11010015] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2018] [Revised: 11/16/2018] [Accepted: 11/17/2018] [Indexed: 12/18/2022] Open
Abstract
l-Arginine supplementation is a potential therapy for treating cardiovascular and metabolic diseases. However, the use of distinct l-arginine sources, intervened populations, and treatment regimens may have yielded confusion about their efficacy. This research constitutes a systematic review and meta-analysis summarizing the effects of l-arginine supplementation compared to placebo in individuals with cardiovascular disease (CVD), obesity, or diabetes. Eligibility criteria included randomized clinical trials and interventions based on oral supplementation of l-arginine with a minimum duration of three days; comparison groups consisted of individuals with the same disease condition receiving an oral placebo substance. The primary outcome was flow-mediated dilation, and secondary outcomes were nitrite/nitrate (NOx) rate and asymmetric dimethylarginine (ADMA). Statistical heterogeneity among studies included in the meta-analyses was assessed using the inconsistency index (I2). Fifty-four full-text articles from 3761 retrieved references were assessed for eligibility. After exclusions, 13 studies were included for data extraction. There was no difference in blood flow after post-ischemic hyperemia between the supplementation of l-arginine and placebo groups before and after the intervention period (standardized mean difference (SMD) = 0.30; 95% confidence intervals (CIs) = −0.85 to 1.46; I2 = 96%). Sensitivity analysis showed decreased heterogeneity when the studies that most favor arginine and placebo were removed, and positive results in favor of arginine supplementation were found (SMD = 0.59; 95% CIs = 0.10 to 1.08; I2 = 75%). No difference was found in meta-analytical estimates of NOx and ADMA responses between arginine or placebo treatments. Overall, the results indicated that oral l-arginine supplementation was not associated with improvements on selected variables in these patients (PROSPERO Registration: CRD42017077289).
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19
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Bossio C, Abdel Aziz I, Tullii G, Zucchetti E, Debellis D, Zangoli M, Di Maria F, Lanzani G, Antognazza MR. Photocatalytic Activity of Polymer Nanoparticles Modulates Intracellular Calcium Dynamics and Reactive Oxygen Species in HEK-293 Cells. Front Bioeng Biotechnol 2018; 6:114. [PMID: 30211158 PMCID: PMC6119808 DOI: 10.3389/fbioe.2018.00114] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2018] [Accepted: 07/20/2018] [Indexed: 11/13/2022] Open
Abstract
Optical modulation of living cells activity by light-absorbing exogenous materials is gaining increasing interest, due to the possibility both to achieve high spatial and temporal resolution with a minimally invasive and reversible technique and to avoid the need of viral transfection with light-sensitive proteins. In this context, conjugated polymers represent ideal candidates for photo-transduction, due to their excellent optoelectronic and biocompatibility properties. In this work, we demonstrate that organic polymer nanoparticles, based on poly(3-hexylthiophene) conjugated polymer, establish a functional interaction with an in vitro cell model (Human Embryonic Kidney cells, HEK-293). They display photocatalytic activity in aqueous environment and, once internalized within the cell cytosol, efficiently generate reactive oxygen species (ROS) upon visible light excitation, without affecting cell viability. Interestingly, light-activated ROS generation deterministically triggers modulation of intracellular calcium ion flux, successfully controlled at the single cell level. In perspective, the capability of polymer NPs to produce ROS and to modulate Ca2+ dynamics by illumination on-demand, at non-toxic levels, may open the path to the study of biological processes with a gene-less approach and unprecedented spatio-temporal resolution, as well as to the development of new biotechnology tools for cell optical modulation.
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Affiliation(s)
- Caterina Bossio
- Center for Nano Science and Technology@PoliMi, Istituto Italiano di Tecnologia, Milan, Italy
| | - Ilaria Abdel Aziz
- Center for Nano Science and Technology@PoliMi, Istituto Italiano di Tecnologia, Milan, Italy
- Dipartimento di Fisica, Politecnico di Milano, Milan, Italy
| | - Gabriele Tullii
- Center for Nano Science and Technology@PoliMi, Istituto Italiano di Tecnologia, Milan, Italy
- Dipartimento di Fisica, Politecnico di Milano, Milan, Italy
| | - Elena Zucchetti
- Center for Nano Science and Technology@PoliMi, Istituto Italiano di Tecnologia, Milan, Italy
- Dipartimento di Fisica, Politecnico di Milano, Milan, Italy
| | - Doriana Debellis
- Electron Microscopy Facility, Istituto Italiano di Tecnologia, Genova, Italy
| | - Mattia Zangoli
- Institute for Organic Synthesis and Photoreactivity, CNR-ISOF, Bologna, Italy
| | - Francesca Di Maria
- Institute for Organic Synthesis and Photoreactivity, CNR-ISOF, Bologna, Italy
| | - Guglielmo Lanzani
- Center for Nano Science and Technology@PoliMi, Istituto Italiano di Tecnologia, Milan, Italy
- Dipartimento di Fisica, Politecnico di Milano, Milan, Italy
| | - Maria Rosa Antognazza
- Center for Nano Science and Technology@PoliMi, Istituto Italiano di Tecnologia, Milan, Italy
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20
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Mathis KM, Sturgeon KM, Winkels RM, Wiskemann J, Williams NI, Schmitz K. Exercise and chemotherapy-induced amenorrhea. Med Hypotheses 2018; 116:49-53. [DOI: 10.1016/j.mehy.2018.04.022] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2018] [Revised: 03/27/2018] [Accepted: 04/24/2018] [Indexed: 11/26/2022]
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Fatty Acid-Stimulated Insulin Secretion vs. Lipotoxicity. Molecules 2018; 23:molecules23061483. [PMID: 29921789 PMCID: PMC6100479 DOI: 10.3390/molecules23061483] [Citation(s) in RCA: 53] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2018] [Revised: 06/13/2018] [Accepted: 06/15/2018] [Indexed: 12/29/2022] Open
Abstract
Fatty acid (FA)-stimulated insulin secretion (FASIS) is reviewed here in contrast to type 2 diabetes etiology, resulting from FA overload, oxidative stress, intermediate hyperinsulinemia, and inflammation, all converging into insulin resistance. Focusing on pancreatic islet β-cells, we compare the physiological FA roles with the pathological ones. Considering FAs not as mere amplifiers of glucose-stimulated insulin secretion (GSIS), but as parallel insulin granule exocytosis inductors, partly independent of the KATP channel closure, we describe the FA initiating roles in the prediabetic state that is induced by retardations in the glycerol-3-phosphate (glucose)-promoted glycerol/FA cycle and by the impaired GPR40/FFA1 (free FA1) receptor pathway, specifically in its amplification by the redox-activated mitochondrial phospholipase, iPLA2γ. Also, excessive dietary FAs stimulate intestine enterocyte incretin secretion, further elevating GSIS, even at low glucose levels, thus contributing to diabetic hyperinsulinemia. With overnutrition and obesity, the FA overload causes impaired GSIS by metabolic dysbalance, paralleled by oxidative and metabolic stress, endoplasmic reticulum stress and numerous pro-apoptotic signaling, all leading to decreased β-cell survival. Lipotoxicity is exerted by saturated FAs, whereas ω-3 polyunsaturated FAs frequently exert antilipotoxic effects. FA-facilitated inflammation upon the recruitment of excess M1 macrophages into islets (over resolving M2 type), amplified by cytokine and chemokine secretion by β-cells, leads to an inevitable failure of pancreatic β-cells.
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22
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Fayh APT, Borges K, Cunha GS, Krause M, Rocha R, de Bittencourt PIH, Moreira JCF, Friedman R, da Silva Rossato J, Fernandes JR, Reischak-Oliveira A. Effects of n-3 fatty acids and exercise on oxidative stress parameters in type 2 diabetic: a randomized clinical trial. J Int Soc Sports Nutr 2018; 15:18. [PMID: 29713249 PMCID: PMC5914016 DOI: 10.1186/s12970-018-0222-2] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2017] [Accepted: 04/12/2018] [Indexed: 12/21/2022] Open
Abstract
Background The relationship between diabetes and oxidative stress has been previously reported. Exercise represents a useful non-pharmacological strategy for the treatment in type 2 diabetic (T2DM) patients, but high intensity exercise can induce a transient inflammatory state and increase oxidative stress. Nutritional strategies that may contribute to the reduction of oxidative stress induced by acute exercise are necessary. The aim of this study was to examine if n-3 PUFA supplementation intervention can attenuate the inflammatory response and oxidative stress associated with high intensity exercise in this population. As a primary outcome, lipoperoxidation measurements (TBARS and F2-isoprostanes) were selected. Methods Thirty T2DM patients, without chronic complications, were randomly allocated into two groups: placebo (gelatin capsules) or n-3 PUFA (capsules containing 180 mg of eicosapentaenoic acid and 120 mg of docosahexaenoic acid). Blood samples were collected fasting before and after 8 weeks supplementation. In the beginning and at the end of protocol, an acute exercise was performed (treadmill), and new blood samples were collected before and immediately after the exercise for measurements of oxidative stress and high-sensitivity C-reactive protein (hs-CRP). Results After the supplementation period, a decrease in triglycerides levels was observed only in n-3 PUFA supplementation group (mean difference and 95% CI of 0.002 (0.000–0.004), p = 0.005). Supplementation also significantly reduced TRAP levels after exercise (mean difference and 95% CI to 9641 (− 20,068–39,351) for − 33,884 (− 56,976 - -10,793), p = 0.004, Cohen’s d effect size = 1.12), but no significant difference was observed in n-3 PUFA supplementation group in lipoperoxidation parameters as TBARS (mean difference and 95% CI to − 3.8 (− 10–2.4) for − 2.9 (− 1.6–7.4) or F2-isoprostanes (mean difference and 95% CI -0.05 (− 0.19–0.10) for − 0.02 (− 0.19–0.16), p > 0.05 for both. Conclusion PUFA n-3 supplementation reduced triglycerides as well as TRAP levels after exercise, without a significant effect on inflammatory and oxidative stress markers. This study is registered at ClinicalTrials.gov with the registration number of NCT03182712.
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Affiliation(s)
- Ana Paula Trussardi Fayh
- Departament of Nutrition, Health Sciences Center, Federal University of State of Rio Grande do Norte, Avenida Senador Salgado Filho, n° 3000, Natal, RN 59078-970 Brazil
| | - Katiuce Borges
- 2Laboratório de Pesquisa do Exercício, Escola de Educação Física, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS 90690-200 Brazil
| | - Giovani Santos Cunha
- 2Laboratório de Pesquisa do Exercício, Escola de Educação Física, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS 90690-200 Brazil
| | - Mauricio Krause
- 3Laboratory of Inflammation, Metabolism and Exercise Research (LAPIMEX) and Laboratory of Cellular Physiology, Departamento de Fisiologia, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS 90050-170 Brazil
| | - Ricardo Rocha
- 4Departamento de Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS 90035-000 Brazil
| | - Paulo Ivo Homem de Bittencourt
- 3Laboratory of Inflammation, Metabolism and Exercise Research (LAPIMEX) and Laboratory of Cellular Physiology, Departamento de Fisiologia, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS 90050-170 Brazil
| | - José Cláudio Fonseca Moreira
- 4Departamento de Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS 90035-000 Brazil
| | - Rogério Friedman
- 5Endocrine Unit, Hospital de Clínicas de Porto Alegre, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS 90035-000 Brazil
| | - Juliane da Silva Rossato
- 3Laboratory of Inflammation, Metabolism and Exercise Research (LAPIMEX) and Laboratory of Cellular Physiology, Departamento de Fisiologia, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS 90050-170 Brazil
| | - Jõao Roberto Fernandes
- 2Laboratório de Pesquisa do Exercício, Escola de Educação Física, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS 90690-200 Brazil
| | - Alvaro Reischak-Oliveira
- 2Laboratório de Pesquisa do Exercício, Escola de Educação Física, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS 90690-200 Brazil
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Mazur A, Guernec A, Lautridou J, Dupas J, Dugrenot E, Belhomme M, Theron M, Guerrero F. Angiotensin Converting Enzyme Inhibitor Has a Protective Effect on Decompression Sickness in Rats. Front Physiol 2018; 9:64. [PMID: 29545754 PMCID: PMC5838564 DOI: 10.3389/fphys.2018.00064] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2017] [Accepted: 01/18/2018] [Indexed: 01/31/2023] Open
Abstract
Introduction: Commercial divers, high altitude pilots, and astronauts are exposed to some inherent risk of decompression sickness (DCS), though the mechanisms that trigger are still unclear. It has been previously showed that diving may induce increased levels of serum angiotensin converting enzyme. The renin angiotensin aldosterone system (RAAS) is one of the most important regulators of blood pressure and fluid volume. The purpose of the present study was to control the influence of angiotensin II on the appearance of DCS. Methods: Sprague Dawley rats have been pre-treated with inhibitor of angiotensin II receptor type 1 (losartan; 10 mg/kg), angiotensin-converting enzyme (ACE) inhibitor (enalapril; 10 mg/kg), and calcium-entry blocker (nifedipine; 20 mg/kg). The experimental groups were treated for 4 weeks before exposure to hyperbaric pressure while controls were not treated. Seventy-five rats were subjected to a simulated dive at 1000 kPa absolute pressure for 45 min before starting decompression. Clinical assessment took place over a period of 60 min after surfacing. Blood samples were collected for measurements of TBARS, interleukin 6 (IL-6), angiotensin II (ANG II) and ACE. Results: The diving protocol induced 60% DCS in non-treated animals. This ratio was significantly decreased after treatment with enalapril, but not other vasoactive drugs. Enalapril did not change ANG II or ACE concentration, while losartant decreased post dive level of ACE but not ANG II. None of the treatment modified the effect of diving on TBARS and IL-6 values. Conclusion: Results suggests that the rennin angiotensin system is involved in a process of triggering DCS but this has to be further investigated. However, a vasorelaxation mediated process, which potentially could increase the load of inert gas during hyperbaric exposure, and antioxidant properties were excluded by our results.
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Affiliation(s)
- Aleksandra Mazur
- EA4324 ORPHY, Institut Brestois Santé Agro Matière, Université de Bretagne Occidentale, Brest, France
| | - Anthony Guernec
- EA4324 ORPHY, Institut Brestois Santé Agro Matière, Université de Bretagne Occidentale, Brest, France
| | - Jacky Lautridou
- EA4324 ORPHY, Institut Brestois Santé Agro Matière, Université de Bretagne Occidentale, Brest, France
| | - Julie Dupas
- EA4324 ORPHY, Institut Brestois Santé Agro Matière, Université de Bretagne Occidentale, Brest, France
| | - Emmanuel Dugrenot
- EA4324 ORPHY, Institut Brestois Santé Agro Matière, Université de Bretagne Occidentale, Brest, France
| | - Marc Belhomme
- EA4324 ORPHY, Institut Brestois Santé Agro Matière, Université de Bretagne Occidentale, Brest, France
| | - Michael Theron
- EA4324 ORPHY, Institut Brestois Santé Agro Matière, Université de Bretagne Occidentale, Brest, France
| | - François Guerrero
- EA4324 ORPHY, Institut Brestois Santé Agro Matière, Université de Bretagne Occidentale, Brest, France
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Miragem AA, Homem de Bittencourt PI. Nitric oxide-heat shock protein axis in menopausal hot flushes: neglected metabolic issues of chronic inflammatory diseases associated with deranged heat shock response. Hum Reprod Update 2018; 23:600-628. [PMID: 28903474 DOI: 10.1093/humupd/dmx020] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2016] [Accepted: 06/28/2017] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND Although some unequivocal underlying mechanisms of menopausal hot flushes have been demonstrated in animal models, the paucity of similar approaches in humans impedes further mechanistic outcomes. Human studies might show some as yet unexpected physiological mechanisms of metabolic adaptation that permeate the phase of decreased oestrogen levels in both symptomatic and asymptomatic women. This is particularly relevant because both the severity and time span of hot flushes are associated with increased risk of chronic inflammatory disease. On the other hand, oestrogen induces the expression of heat shock proteins of the 70 kDa family (HSP70), which are anti-inflammatory and cytoprotective protein chaperones, whose expression is modulated by different types of physiologically stressful situations, including heat stress and exercise. Therefore, lower HSP70 expression secondary to oestrogen deficiency increases cardiovascular risk and predisposes the patient to senescence-associated secretory phenotype (SASP) that culminates in chronic inflammatory diseases, such as obesities, type 2 diabetes, neuromuscular and neurodegenerative diseases. OBJECTIVE AND RATIONALE This review focuses on HSP70 and its accompanying heat shock response (HSR), which is an anti-inflammatory and antisenescent pathway whose intracellular triggering is also oestrogen-dependent via nitric oxide (NO) production. The main goal of the manuscript was to show that the vasomotor symptoms that accompany hot flushes may be a disguised clue for important neuroendocrine alterations linking oestrogen deficiency to the anti-inflammatory HSR. SEARCH METHODS Results from our own group and recent evidence on hypothalamic control of central temperature guided a search on PubMed and Google Scholar websites. OUTCOMES Oestrogen elicits rapid production of the vasodilatory gas NO, a powerful activator of HSP70 expression. Whence, part of the protective effects of oestrogen over cardiovascular and neuroendocrine systems is tied to its capacity of inducing the NO-elicited HSR. The hypothalamic areas involved in thermoregulation (infundibular nucleus in humans and arcuate nucleus in other mammals) and whose neurons are known to have their function altered after long-term oestrogen ablation, particularly kisspeptin-neurokinin B-dynorphin neurons, (KNDy) are the same that drive neuroprotective expression of HSP70 and, in many cases, this response is via NO even in the absence of oestrogen. From thence, it is not illogical that hot flushes might be related to an evolutionary adaptation to re-equip the NO-HSP70 axis during the downfall of circulating oestrogen. WIDER IMPLICATIONS Understanding of HSR could shed light on yet uncovered mechanisms of menopause-associated diseases as well as on possible manipulation of HSR in menopausal women through physiological, pharmacological, nutraceutical and prebiotic interventions. Moreover, decreased HSR indices (that can be clinically determined with ease) in perimenopause could be of prognostic value in predicting the moment and appropriateness of starting a HRT.
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Affiliation(s)
- Antônio Azambuja Miragem
- Laboratory of Cellular Physiology, Department of Physiology, Federal University of Rio Grande do Sul, Rua Sarmento Leite 500, ICBS, 2nd Floor, Suite 350, Porto Alegre, RS 90050-170, Brazil.,Federal Institute of Education, Science and Technology 'Farroupilha', Rua Uruguai 1675, Santa Rosa, RS 98900-000, Brazil
| | - Paulo Ivo Homem de Bittencourt
- Laboratory of Cellular Physiology, Department of Physiology, Federal University of Rio Grande do Sul, Rua Sarmento Leite 500, ICBS, 2nd Floor, Suite 350, Porto Alegre, RS 90050-170, Brazil
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25
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Decroix L, Tonoli C, Soares DD, Descat A, Drittij-Reijnders MJ, Weseler AR, Bast A, Stahl W, Heyman E, Meeusen R. Acute cocoa Flavanols intake has minimal effects on exercise-induced oxidative stress and nitric oxide production in healthy cyclists: a randomized controlled trial. J Int Soc Sports Nutr 2017; 14:28. [PMID: 28811749 PMCID: PMC5553857 DOI: 10.1186/s12970-017-0186-7] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2016] [Accepted: 08/06/2017] [Indexed: 12/16/2022] Open
Abstract
BACKGROUND Cocoa flavanols (CF) can stimulate vasodilation by improved nitric oxide (NO) synthesis and have antioxidant and anti-inflammatory capacities. This study aimed to examine whether acute CF intake can affect exercise-induced changes in antioxidant capacity, oxidative stress, inflammation and NO production, as well as exercise performance and recovery in well-trained cyclists. METHODS Twelve well-trained male cyclists (mean ± SD age, VO2max: 30 ± 3 years, 63.0 ± 3.5 ml/kg/min) participated in this randomized, double-blind, cross over study. On 2 separate occasions, subjects performed two 30-min time trials 1.5 (TT1) and 3 (TT2) hours after CF (900 mg CF) or placebo (PL, 13 mg CF) intake, interposed by passive rest. Lactate, glucose, heartrate, rating of perceived exertion (RPE) and power output were measured during the TTs. Blood was drawn at baseline, before and after each TT and analyzed for epicatechin serum concentrations, trolox equivalent antioxidative capacity (TEAC), uric acid (UA), malonaldehyde (MDA), L-arginine/ADMA, citrulline, interleukin (IL)-1, IL-6 and tumor necrosis factor (TNF)-α plasma concentrations. Relative changes in blood markers and pacing strategy during TT were analysed by repeated measured ANOVA. TT performance was compared between PL and CF by paired t-test. RESULTS Epicatechin concentrations were increased by CF intake. Exercise-induced increase in TEAC/UA was improved by CF intake (F(1) = 5.57; p = .038) (post-TT1: PL: 113.34 ± 3.9%, CF: 117.64 ± 3.96%, post-TT2: PL: 108.59 ± 3.95%, CF: 123.72 ± 7.4% to baseline), while exercise-induced increases in MDA, IL-1 and IL-6 were not affected by CF intake. TNF-α was unaltered by exercise and by CF. Exercise-induced decreases in L-arginine/ADMA and increases in citrulline were not affected by CF intake. TT1 and TT2 performance and exercise-induced physiological changes were unaffected by CF intake. CONCLUSION Acute CF intake increased total antioxidant capacity in rest and during exercise, but did not affect exercise-induced lipid peroxidation, inflammation, nor NO production in healthy athletes. Acute CF intake did not improve TT performance and recovery. TRIAL REGISTRATION ISRCTN32875, 21-11-2016, retrospectively registered.
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Affiliation(s)
- Lieselot Decroix
- Human Physiology Research Group, Faculty of Physical Education and Physical Therapy, Vrije Universiteit Brussel, Brussels, Belgium.,Department of Physical Activity, Muscle and Health, Faculty of Sport Sciences and Physical Education, Université de Lille, Lille, France
| | - Cajsa Tonoli
- Human Physiology Research Group, Faculty of Physical Education and Physical Therapy, Vrije Universiteit Brussel, Brussels, Belgium.,Department of Physical Activity, Muscle and Health, Faculty of Sport Sciences and Physical Education, Université de Lille, Lille, France.,Department Rehabilitation sciences and kinesitherapy, Faculty of Physical Education and Physical Therapy, Universiteit Gent, Ghent, Belgium
| | - Danusa Dias Soares
- Department of Physical Education, University of Minas Gerais, Belo Horizonte, Brazil
| | - Amandine Descat
- Center of measurements and analysis (CMA), Facultyof Pharmaceutical Sciences, Université de Lille, Lille, France
| | | | - Antje R Weseler
- Department of Pharmacology and Toxicology, Maastricht University, Maastricht, the Netherlands
| | - Aalt Bast
- Department of Pharmacology and Toxicology, Maastricht University, Maastricht, the Netherlands
| | - Wilhelm Stahl
- Institute of Biochemistry and Molecular Biology I, Faculty of Medicine, Heinrich-Heine University Dusseldorf, Dusseldorf, Germany
| | - Elsa Heyman
- Department of Physical Activity, Muscle and Health, Faculty of Sport Sciences and Physical Education, Université de Lille, Lille, France
| | - Romain Meeusen
- Human Physiology Research Group, Faculty of Physical Education and Physical Therapy, Vrije Universiteit Brussel, Brussels, Belgium
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26
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Heck TG, Scomazzon SP, Nunes PR, Schöler CM, da Silva GS, Bittencourt A, Faccioni-Heuser MC, Krause M, Bazotte RB, Curi R, Homem de Bittencourt PI. Acute exercise boosts cell proliferation and the heat shock response in lymphocytes: correlation with cytokine production and extracellular-to-intracellular HSP70 ratio. Cell Stress Chaperones 2017; 22:271-291. [PMID: 28251488 PMCID: PMC5352601 DOI: 10.1007/s12192-017-0771-3] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2016] [Revised: 01/24/2017] [Accepted: 01/31/2017] [Indexed: 12/23/2022] Open
Abstract
Exercise stimulates immune responses, but the appropriate "doses" for such achievements are unsettled. Conversely, in metabolic tissues, exercise improves the heat shock (HS) response, a universal cytoprotective response to proteostasis challenges that are centred on the expression of the 70-kDa family of intracellular heat shock proteins (iHSP70), which are anti-inflammatory. Concurrently, exercise triggers the export of HSP70 towards the extracellular milieu (eHSP70), where they work as pro-inflammatory cytokines. As the HS response is severely compromised in chronic degenerative diseases of inflammatory nature, we wondered whether acute exercise bouts of different intensities could alter the HS response of lymphocytes from secondary lymphoid organs and whether this would be related to immunoinflammatory responses. Adult male Wistar rats swam for 20 min at low, moderate, high or strenuous intensities as per an overload in tail base. Controls remained at rest under the same conditions. Afterwards, mesenteric lymph node lymphocytes were assessed for the potency of the HS response (42 °C for 2 h), NF-κB binding activity, mitogen-stimulated proliferation and cytokine production. Exercise stimulated cell proliferation in an "inverted-U" fashion peaking at moderate load, which was paralleled by suppression of NF-κB activation and nuclear location, and followed by enhanced HS response in relation to non-exercised animals. Comparative levels of eHSP70 to iHSP70 (H-index) matched IL-2/IL-10 ratios. We conclude that exercise, in a workload-dependent way, stimulates immunoinflammatory performance of lymphocytes of tissues far from the circulation and this is associated with H-index of stress response, which is useful to assess training status and immunosurveillance balance.
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Affiliation(s)
- Thiago Gomes Heck
- Physiology Research Group, Department of Life Sciences, Postgraduate Program in Integral Attention to Health, Regional University of the Northwestern Rio Grande do Sul State, Rua do Comércio, 3000, Ijuí, RS, 98700-000, Brazil.
- Laboratory of Cellular Physiology, Department of Physiology, Institute of Basic Health Sciences, Federal University of Rio Grande do Sul, Rua Sarmento Leite, 500 2nd floor, suite 350 lab 02, Porto Alegre, RS, 90050-170, Brazil.
| | - Sofia Pizzato Scomazzon
- Laboratory of Cellular Physiology, Department of Physiology, Institute of Basic Health Sciences, Federal University of Rio Grande do Sul, Rua Sarmento Leite, 500 2nd floor, suite 350 lab 02, Porto Alegre, RS, 90050-170, Brazil
- Department of Biology, University of Rome Tor Vergata, Via della Ricerca Scientifica, 00133, Rome, Italy
| | - Patrícia Renck Nunes
- Laboratory of Cellular Physiology, Department of Physiology, Institute of Basic Health Sciences, Federal University of Rio Grande do Sul, Rua Sarmento Leite, 500 2nd floor, suite 350 lab 02, Porto Alegre, RS, 90050-170, Brazil
| | - Cinthia Maria Schöler
- Laboratory of Cellular Physiology, Department of Physiology, Institute of Basic Health Sciences, Federal University of Rio Grande do Sul, Rua Sarmento Leite, 500 2nd floor, suite 350 lab 02, Porto Alegre, RS, 90050-170, Brazil
| | - Gustavo Stumpf da Silva
- Laboratory of Cellular Physiology, Department of Physiology, Institute of Basic Health Sciences, Federal University of Rio Grande do Sul, Rua Sarmento Leite, 500 2nd floor, suite 350 lab 02, Porto Alegre, RS, 90050-170, Brazil
| | - Aline Bittencourt
- Laboratory of Cellular Physiology, Department of Physiology, Institute of Basic Health Sciences, Federal University of Rio Grande do Sul, Rua Sarmento Leite, 500 2nd floor, suite 350 lab 02, Porto Alegre, RS, 90050-170, Brazil
| | - Maria Cristina Faccioni-Heuser
- Department of Morphological Sciences, Institute of Basic Health Sciences, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Mauricio Krause
- Laboratory of Cellular Physiology, Department of Physiology, Institute of Basic Health Sciences, Federal University of Rio Grande do Sul, Rua Sarmento Leite, 500 2nd floor, suite 350 lab 02, Porto Alegre, RS, 90050-170, Brazil
| | - Roberto Barbosa Bazotte
- Department of Pharmacology and Therapeutics, State University of Maringá, Maringá, PR, Brazil
| | - Rui Curi
- Department of Physiology and Biophysics, Institute of Biomedical Sciences, University of São Paulo, São Paulo, SP, 05508-900, Brazil
- Institute of Physical Activity Sciences and Sports, Cruzeiro do Sul University, Rua Galvão Bueno, 868 - 13° Andar, Bloco B, Sala 1302, Liberdade, São Paulo, SP, 01506-000, Brazil
| | - Paulo Ivo Homem de Bittencourt
- Laboratory of Cellular Physiology, Department of Physiology, Institute of Basic Health Sciences, Federal University of Rio Grande do Sul, Rua Sarmento Leite, 500 2nd floor, suite 350 lab 02, Porto Alegre, RS, 90050-170, Brazil.
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Zanotto TM, Quaresma PGF, Guadagnini D, Weissmann L, Santos AC, Vecina JF, Calisto K, Santos A, Prada PO, Saad MJA. Blocking iNOS and endoplasmic reticulum stress synergistically improves insulin resistance in mice. Mol Metab 2016; 6:206-218. [PMID: 28180062 PMCID: PMC5279911 DOI: 10.1016/j.molmet.2016.12.005] [Citation(s) in RCA: 24] [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: 10/07/2016] [Revised: 12/02/2016] [Accepted: 12/12/2016] [Indexed: 12/12/2022] Open
Abstract
OBJECTIVE Recent data show that iNOS has an essential role in ER stress in obesity. However, whether iNOS is sufficient to account for obesity-induced ER stress and Unfolded Protein Response (UPR) has not yet been investigated. In the present study, we used iNOS knockout mice to investigate whether high-fat diet (HFD) can still induce residual ER stress-associated insulin resistance. METHODS For this purpose, we used the intraperitoneal glucose tolerance test (GTT), euglycemic-hyperinsulinemic clamp, western blotting and qPCR in liver, muscle, and adipose tissue of iNOS KO and control mice on HFD. RESULTS The results of the present study demonstrated that, in HFD fed mice, iNOS-induced alteration in insulin signaling is an essential mechanism of insulin resistance in muscle, suggesting that iNOS may represent an important target that could be blocked in order to improve insulin sensitivity in this tissue. However, in liver and adipose tissue, the insulin resistance induced by HFD was only partially dependent on iNOS, and, even in the presence of genetic or pharmacological blockade of iNOS, a clear ER stress associated with altered insulin signaling remained evident in these tissues. When this ER stress was blocked pharmacologically, insulin signaling was improved, and a complete recovery of glucose tolerance was achieved. CONCLUSIONS Taken together, these results reinforce the tissue-specific regulation of insulin signaling in obesity, with iNOS being sufficient to account for insulin resistance in muscle, but in liver and adipose tissue ER stress and insulin resistance can be induced by both iNOS-dependent and iNOS-independent mechanisms.
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Key Words
- AKT, Protein kinase B
- ATF6, activating transcription factor 6
- Blocking
- ER, endoplasmic reticulum
- Endoplasmic reticulum stress
- GAPDH, glyceraldehyde 3-phosphate dehydrogenase
- GTT, glucose tolerance test
- HFD, high-fat diet
- IKK, kappa α/β kinase
- IRE1, inositol requiring enzyme 1
- ITT, insulin tolerance test
- Improving
- Insulin resistance
- JNK, c-JunN-terminal kinase
- NO, nitric oxide
- PERK, protein kinase RNA-like ER kinase
- UPR, unfolded protein response
- iNOS
- iNOS, inducible nitric oxide synthase
- qPCR, real time PCR
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Affiliation(s)
- Tamires M Zanotto
- Department of Internal Medicine, State University of Campinas (UNICAMP), Campinas, SP, Brazil; Department of Medical Clinics, Obesity and Comorbidities Research Center (O.C.R.C.), State University of Campinas (UNICAMP), Campinas, SP, Brazil
| | - Paula G F Quaresma
- Department of Internal Medicine, State University of Campinas (UNICAMP), Campinas, SP, Brazil; Department of Medical Clinics, Obesity and Comorbidities Research Center (O.C.R.C.), State University of Campinas (UNICAMP), Campinas, SP, Brazil
| | - Dioze Guadagnini
- Department of Internal Medicine, State University of Campinas (UNICAMP), Campinas, SP, Brazil
| | - Lais Weissmann
- Department of Internal Medicine, State University of Campinas (UNICAMP), Campinas, SP, Brazil
| | - Andressa C Santos
- Department of Internal Medicine, State University of Campinas (UNICAMP), Campinas, SP, Brazil
| | - Juliana F Vecina
- Department of Internal Medicine, State University of Campinas (UNICAMP), Campinas, SP, Brazil; Department of Medical Clinics, Obesity and Comorbidities Research Center (O.C.R.C.), State University of Campinas (UNICAMP), Campinas, SP, Brazil
| | - Kelly Calisto
- Department of Internal Medicine, State University of Campinas (UNICAMP), Campinas, SP, Brazil; Department of Medical Clinics, Obesity and Comorbidities Research Center (O.C.R.C.), State University of Campinas (UNICAMP), Campinas, SP, Brazil
| | - Andrey Santos
- Department of Internal Medicine, State University of Campinas (UNICAMP), Campinas, SP, Brazil
| | - Patrícia O Prada
- Department of Internal Medicine, State University of Campinas (UNICAMP), Campinas, SP, Brazil; School of Applied Sciences, State University of Campinas (UNICAMP), Limeira, SP, Brazil; Department of Medical Clinics, Obesity and Comorbidities Research Center (O.C.R.C.), State University of Campinas (UNICAMP), Campinas, SP, Brazil
| | - Mario J A Saad
- Department of Internal Medicine, State University of Campinas (UNICAMP), Campinas, SP, Brazil; Department of Medical Clinics, Obesity and Comorbidities Research Center (O.C.R.C.), State University of Campinas (UNICAMP), Campinas, SP, Brazil.
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Leite JSM, Cruzat VF, Krause M, Homem de Bittencourt PI. Physiological regulation of the heat shock response by glutamine: implications for chronic low-grade inflammatory diseases in age-related conditions. ACTA ACUST UNITED AC 2016. [DOI: 10.1186/s41110-016-0021-y] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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29
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Zhang L, Li YF, Yuan S, Zhang S, Zheng H, Liu J, Sun P, Gu Y, Kurihara H, He RR, Chen H. Bioactivity Focus of α-Cyano-4-hydroxycinnamic acid (CHCA) Leads to Effective Multifunctional Aldose Reductase Inhibitors. Sci Rep 2016; 6:24942. [PMID: 27109517 PMCID: PMC4842970 DOI: 10.1038/srep24942] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2015] [Accepted: 04/06/2016] [Indexed: 01/07/2023] Open
Abstract
Bioactivity focus on α-cyano-4-hydroxycinnamic acid (CHCA) scaffold results in a small library of novel multifunctional aldose reductase (ALR2) inhibitors. All the entities displayed good to excellent inhibition with IC50 72-405 nM. (R,E)-N-(3-(2-acetamido-3-(benzyloxy)propanamido)propyl)-2-cyano-3-(4-hydroxy phenyl)acrylamide (5f) was confirmed as the most active inhibitor (IC50 72.7 ± 1.6 nM), and the best antioxidant. 5f bound to ALR2 with new mode without affecting the aldehyde reductase (ALR1) activity, implicating high selectivity to ALR2. 5f was demonstrated as both an effective ALR2 inhibitor (ARI) and antioxidant in a chick embryo model of hyperglycemia. It attenuated hyperglycemia-induced incidence of neural tube defects (NTD) and death rate, and significantly improved the body weight and morphology of the embryos. 5f restored the expression of paired box type 3 transcription factor (Pax3), and reduced the hyperglycemia-induced increase of ALR2 activity, sorbitol accumulation, and the generation of ROS and MDA to normal levels. All the evidences support that 5f may be a potential agent to treat diabetic complications.
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Affiliation(s)
- Laitao Zhang
- Institute of Traditional Chinese Medicine and Natural Product, College of Pharmacy, Jinan University, Guangzhou 510632, P. R. China
| | - Yi-Fang Li
- Institute of Traditional Chinese Medicine and Natural Product, College of Pharmacy, Jinan University, Guangzhou 510632, P. R. China
- Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research, Guangzhou 510632, P. R. China
| | - Sheng Yuan
- Institute of Traditional Chinese Medicine and Natural Product, College of Pharmacy, Jinan University, Guangzhou 510632, P. R. China
| | - Shijie Zhang
- Institute of Clinical Pharmacology, Guangzhou University of Chinese Medicine, Guangzhou 510006, P. R. China
| | - Huanhuan Zheng
- Institute of Traditional Chinese Medicine and Natural Product, College of Pharmacy, Jinan University, Guangzhou 510632, P. R. China
| | - Jie Liu
- Institute of Traditional Chinese Medicine and Natural Product, College of Pharmacy, Jinan University, Guangzhou 510632, P. R. China
| | - Pinghua Sun
- Institute of Traditional Chinese Medicine and Natural Product, College of Pharmacy, Jinan University, Guangzhou 510632, P. R. China
| | - Yijun Gu
- National Center for Protein Science Shanghai, Shanghai 201210, P. R. China
| | - Hiroshi Kurihara
- Institute of Traditional Chinese Medicine and Natural Product, College of Pharmacy, Jinan University, Guangzhou 510632, P. R. China
- Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research, Guangzhou 510632, P. R. China
| | - Rong-Rong He
- Institute of Traditional Chinese Medicine and Natural Product, College of Pharmacy, Jinan University, Guangzhou 510632, P. R. China
- Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research, Guangzhou 510632, P. R. China
| | - Heru Chen
- Institute of Traditional Chinese Medicine and Natural Product, College of Pharmacy, Jinan University, Guangzhou 510632, P. R. China
- Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research, Guangzhou 510632, P. R. China
- State key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, P. R. China
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Mazur A, Lambrechts K, Wang Q, Belhomme M, Theron M, Buzzacott P, Guerrero F. Influence of decompression sickness on vasocontraction of isolated rat vessels. J Appl Physiol (1985) 2016; 120:784-91. [PMID: 26769950 DOI: 10.1152/japplphysiol.00139.2015] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2015] [Accepted: 01/12/2016] [Indexed: 01/03/2023] Open
Abstract
Studies conducted in divers indicate that endothelium function is impaired following a dive even without decompression sickness (DCS). Our previous experiment conducted on rat isolated vessels showed no differences in endothelium-dependent vasodilation after a simulated dive even in the presence of DCS, while contractile response to phenylephrine was progressively impaired with increased decompression stress. This study aimed to further investigate the effect of DCS on vascular smooth muscle. Thirty-two male Sprague-Dawley rats were submitted to the same hyperbaric protocol and classified according to the severity of DCS: no-DCS (without clinical symptoms), mild-DCS, or severe-DCS (dead within 1 h). A control group remained at atmospheric pressure. Isometric tension was measured in rings of abdominal aorta and mesenteric arteries. Single dose contraction was assessed with KCl solution. Dose-response curves were obtained with phenylephrine and endothelin-1. Phenylephrine-induced contraction was observed in the presence of antioxidant tempol. Additionally, plasma concentrations of angiotensin II, angiotensin-converting enzyme, and thiobarbituric acid reactive substances (TBARS) were assessed. Response to phenylephrine was impaired only among mild-DCS in both vessels. Dose-response curves to endothelin-1 were impaired after mild-DCS in mesenteric and severe-DCS in aorta. KCl-induced contraction was affected after hyperbaric exposure regardless of DCS status in aorta only. These results confirm postdive vascular dysfunction is dependent on the type of vessel. It further evidenced that vascular dysfunction is triggered by DCS rather than by diving itself and suggest the influence of circulating factor/s. Diving-induced impairment of the L-type voltage-dependent Ca(2+) channels and/or influence of renin-angiotensin system is proposed.
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Affiliation(s)
- Aleksandra Mazur
- EA4324-ORPHY Laboratory, Université de Bretagne Occidentale, Brest, France
| | - Kate Lambrechts
- EA4324-ORPHY Laboratory, Université de Bretagne Occidentale, Brest, France
| | - Qiong Wang
- EA4324-ORPHY Laboratory, Université de Bretagne Occidentale, Brest, France
| | - Marc Belhomme
- EA4324-ORPHY Laboratory, Université de Bretagne Occidentale, Brest, France
| | - Michael Theron
- EA4324-ORPHY Laboratory, Université de Bretagne Occidentale, Brest, France
| | - Peter Buzzacott
- EA4324-ORPHY Laboratory, Université de Bretagne Occidentale, Brest, France
| | - François Guerrero
- EA4324-ORPHY Laboratory, Université de Bretagne Occidentale, Brest, France
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Zhang SJ, Li YF, Tan RR, Tsoi B, Huang WS, Huang YH, Tang XL, Hu D, Yao N, Yang X, Kurihara H, Wang Q, He RR. A new gestational diabetes mellitus model: hyperglycemia-induced eye malformation via inhibition of Pax6 in the chick embryo. Dis Model Mech 2016; 9:177-86. [PMID: 26744353 PMCID: PMC4770145 DOI: 10.1242/dmm.022012] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2015] [Accepted: 12/26/2015] [Indexed: 12/23/2022] Open
Abstract
Gestational diabetes mellitus (GDM) is one of the leading causes of fetal malformations. However, few models have been developed to study the underlying mechanisms of GDM-induced fetal eye malformation. In this study, a high concentration of glucose (0.2 mmol per egg) was injected into the air sac of chick embryos on embryo development day (EDD) 1 to develop a hyperglycemia model. Results showed that 47.3% of embryonic eye malformation happened on EDD 5. In this model, the key genes regulating eye development, Pax6, Six3 and Otx2, were downregulated by hyperglycemia. Among these genes, the expression of Pax6 was the most vulnerable to hyperglycemia, being suppressed by 70%. A reduction in Pax6 gene expression induced eye malformation in chick embryos. However, increased expression of Pax6 in chick embryos could rescue hyperglycemia-induced eye malformation. Hyperglycemia stimulated O-linked N-acetylglucosaminylation, which caused oxidative stress in chick embryos. Pax6 was found to be vulnerable to free radicals, but the antioxidant edaravone could restore Pax6 expression and reverse eye malformation. These results illustrated a successful establishment of a new chick embryo model to study the molecular mechanism of hyperglycemia-induced eye malformation. The suppression of the Pax6 gene is probably mediated by oxidative stress and could be a crucial target for the therapy of GDM-induced embryonic eye malformation. Summary: Hyperglycemia inhibited Pax6 via oxidative stress and impaired eye development in the chick embryo, a new gestational diabetes mellitus model.
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Affiliation(s)
- Shi-Jie Zhang
- Anti-stress and Health Research Center, College of Pharmacy, Jinan University, Guangzhou 510632, China Institute of Clinical Pharmacology, Guangzhou University of Chinese Medicine, Guangzhou 510006, China
| | - Yi-Fang Li
- Anti-stress and Health Research Center, College of Pharmacy, Jinan University, Guangzhou 510632, China
| | - Rui-Rong Tan
- Anti-stress and Health Research Center, College of Pharmacy, Jinan University, Guangzhou 510632, China
| | - Bun Tsoi
- Anti-stress and Health Research Center, College of Pharmacy, Jinan University, Guangzhou 510632, China
| | - Wen-Shan Huang
- Anti-stress and Health Research Center, College of Pharmacy, Jinan University, Guangzhou 510632, China
| | - Yi-Hua Huang
- Anti-stress and Health Research Center, College of Pharmacy, Jinan University, Guangzhou 510632, China
| | - Xiao-Long Tang
- Anti-stress and Health Research Center, College of Pharmacy, Jinan University, Guangzhou 510632, China
| | - Dan Hu
- Anti-stress and Health Research Center, College of Pharmacy, Jinan University, Guangzhou 510632, China
| | - Nan Yao
- Guangdong Research Institute of Traditional Chinese Medicine Manufacturing Technology, Guangzhou 510095, China
| | - Xuesong Yang
- Division of Histology & Embryology, Key Laboratory for Regenerative Medicine of the Ministry of Education, Medical College, Jinan University, Guangzhou 510632, China
| | - Hiroshi Kurihara
- Anti-stress and Health Research Center, College of Pharmacy, Jinan University, Guangzhou 510632, China
| | - Qi Wang
- Institute of Clinical Pharmacology, Guangzhou University of Chinese Medicine, Guangzhou 510006, China
| | - Rong-Rong He
- Anti-stress and Health Research Center, College of Pharmacy, Jinan University, Guangzhou 510632, China
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Tucker PS, Briskey DR, Scanlan AT, Coombes JS, Dalbo VJ. High intensity interval training favourably affects antioxidant and inflammation mRNA expression in early-stage chronic kidney disease. Free Radic Biol Med 2015; 89:466-72. [PMID: 26453919 DOI: 10.1016/j.freeradbiomed.2015.07.162] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/20/2015] [Revised: 07/14/2015] [Accepted: 07/25/2015] [Indexed: 12/13/2022]
Abstract
Increased levels of oxidative stress and inflammation have been linked to the progression of chronic kidney disease. To reduce oxidative stress and inflammation related to chronic kidney disease, chronic aerobic exercise is often recommended. Data suggests high intensity interval training may be more beneficial than traditional aerobic exercise. However, appraisals of differing modes of exercise, along with explanations of mechanisms responsible for observed effects, are lacking. This study assessed effects of eight weeks of high intensity interval training (85% VO2max), versus low intensity exercise (45-50% VO2max) and sedentary behaviour, in an animal model of early-stage chronic kidney disease. We examined kidney-specific mRNA expression of genes related to endogenous antioxidant enzyme activity (glutathione peroxidase 1; Gpx1, superoxide dismutase 1; Sod1, and catalase; Cat) and inflammation (kidney injury molecule 1; Kim1 and tumour necrosis factor receptor super family 1b; Tnfrsf1b), as well as plasma F2-isoprostanes, a marker of lipid peroxidation. Compared to sedentary behaviour, high intensity interval training resulted in increased mRNA expression of Sod1 (p=0.01) and Cat (p<0.001). Compared to low intensity exercise, high intensity interval training resulted in increased mRNA expression of Cat (p<0.001) and Tnfrsf1b (p=0.047). In this study, high intensity interval training was superior to sedentary behaviour and low intensity exercise as high intensity interval training beneficially influenced expression of genes related to endogenous antioxidant enzyme activity and inflammation.
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Affiliation(s)
- Patrick S Tucker
- Clinical Biochemistry Laboratory, Bruce Highway, Building 81, Central Queensland University, Rockhampton, Australia 4702; Human Exercise and Training Laboratory, Bruce Highway, Building 81, Central Queensland University, Rockhampton, Australia 4702.
| | - David R Briskey
- Antioxidant Research Group, Room 535, Human Movement and Nutrition Sciences Building, University of Queensland, Brisbane, Australia 4072.
| | - Aaron T Scanlan
- Clinical Biochemistry Laboratory, Bruce Highway, Building 81, Central Queensland University, Rockhampton, Australia 4702; Human Exercise and Training Laboratory, Bruce Highway, Building 81, Central Queensland University, Rockhampton, Australia 4702.
| | - Jeff S Coombes
- Antioxidant Research Group, Room 535, Human Movement and Nutrition Sciences Building, University of Queensland, Brisbane, Australia 4072.
| | - Vincent J Dalbo
- Clinical Biochemistry Laboratory, Bruce Highway, Building 81, Central Queensland University, Rockhampton, Australia 4702; Human Exercise and Training Laboratory, Bruce Highway, Building 81, Central Queensland University, Rockhampton, Australia 4702.
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Tan RR, Zhang SJ, Li YF, Tsoi B, Huang WS, Yao N, Hong M, Zhai YJ, Mao ZF, Tang LP, Kurihara H, Wang Q, He RR. Proanthocyanidins Prevent High Glucose-Induced Eye Malformation by Restoring Pax6 Expression in Chick Embryo. Nutrients 2015; 7:6567-81. [PMID: 26262640 PMCID: PMC4555138 DOI: 10.3390/nu7085299] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2015] [Accepted: 07/24/2015] [Indexed: 12/16/2022] Open
Abstract
Gestational diabetes mellitus (GDM) is one of the leading causes of offspring malformations, in which eye malformation is an important disease. It has raised demand for therapy to improve fetal outcomes. In this study, we used chick embryo to establish a GDM model to study the protective effects of proanthocyanidins on eye development. Chick embryos were exposed to high glucose (0.2 mmol/egg) on embryo development day (EDD) 1. Proanthocyanidins (1 and 10 nmol/egg) were injected into the air sac on EDD 0. Results showed that both dosages of proanthocyanidins could prevent the eye malformation and rescue the high glucose-induced oxidative stress significantly, which the similar effects were showed in edaravone. However, proanthocyanidins could not decrease the glucose concentration of embryo eye. Moreover, the key genes regulating eye development, Pax6, was down-regulated by high glucose. Proanthocyanidins could restore the suppressed expression of Pax6. These results indicated proanthocyanidins might be a promising natural agent to prevent high glucose-induced eye malformation by restoring Pax6 expression.
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Affiliation(s)
- Rui-Rong Tan
- Anti-stress and Health Center, Pharmacy College, Jinan University, Guangzhou 510632, China.
| | - Shi-Jie Zhang
- Anti-stress and Health Center, Pharmacy College, Jinan University, Guangzhou 510632, China.
- Institute of Clinical Pharmacology, Guangzhou University of Chinese Medicine, Guangzhou 510006, China.
| | - Yi-Fang Li
- Anti-stress and Health Center, Pharmacy College, Jinan University, Guangzhou 510632, China.
| | - Bun Tsoi
- Anti-stress and Health Center, Pharmacy College, Jinan University, Guangzhou 510632, China.
| | - Wen-Shan Huang
- Anti-stress and Health Center, Pharmacy College, Jinan University, Guangzhou 510632, China.
| | - Nan Yao
- Guangdong Research Institute of Traditional Chinese Medicine Manufacturing Technology, Guangzhou 510095, Guangdong, China.
| | - Mo Hong
- Anti-stress and Health Center, Pharmacy College, Jinan University, Guangzhou 510632, China.
| | - Yu-Jia Zhai
- Anti-stress and Health Center, Pharmacy College, Jinan University, Guangzhou 510632, China.
| | - Zhong-Fu Mao
- Anti-stress and Health Center, Pharmacy College, Jinan University, Guangzhou 510632, China.
| | - Lu-Ping Tang
- Anti-stress and Health Center, Pharmacy College, Jinan University, Guangzhou 510632, China.
| | - Hiroshi Kurihara
- Anti-stress and Health Center, Pharmacy College, Jinan University, Guangzhou 510632, China.
| | - Qi Wang
- Institute of Clinical Pharmacology, Guangzhou University of Chinese Medicine, Guangzhou 510006, China.
| | - Rong-Rong He
- Anti-stress and Health Center, Pharmacy College, Jinan University, Guangzhou 510632, China.
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The regulatory roles of NADPH oxidase, intra- and extra-cellular HSP70 in pancreatic islet function, dysfunction and diabetes. Clin Sci (Lond) 2015; 128:789-803. [DOI: 10.1042/cs20140695] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The 70 kDa heat-shock protein (HSP70) family is important for a dynamic range of cellular processes that include protection against cell stress, modulation of cell signalling, gene expression, protein synthesis, protein folding and inflammation. Within this family, the inducible 72 kDa and the cognate 73 kDa forms are found at the highest level. HSP70 has dual functions depending on location. For example, intracellular HSP70 (iHSP70) is anti-inflammatory whereas extracellular HSP70 (eHSP70) has a pro-inflammatory function, resulting in local and systemic inflammation. We have recently identified a divergence in the levels of eHSP70 and iHSP70 in subjects with diabetes compared with healthy subjects and also reported that eHSP70 was correlated with insulin resistance and pancreatic β-cell dysfunction/death. In the present review, we describe possible mechanisms by which HSP70 participates in cell function/dysfunction, including the activation of NADPH oxidase isoforms leading to oxidative stress, focusing on the possible role of HSPs and signalling in pancreatic islet α- and β-cell physiological function in health and Type 2 diabetes mellitus.
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Chronic kidney disease influences multiple systems: describing the relationship between oxidative stress, inflammation, kidney damage, and concomitant disease. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2015; 2015:806358. [PMID: 25861414 PMCID: PMC4377508 DOI: 10.1155/2015/806358] [Citation(s) in RCA: 116] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/25/2014] [Accepted: 03/03/2015] [Indexed: 01/11/2023]
Abstract
Chronic kidney disease (CKD) is characterized by increased levels of oxidative stress and inflammation. Oxidative stress and inflammation promote renal injury via damage to molecular components of the kidney. Unfortunately, relationships between inflammation and oxidative stress are cyclical in that the inflammatory processes that exist to repair radical-mediated damage may be a source of additional free radicals, resulting in further damage to renal tissue. Oxidative stress and inflammation also have the ability to become systemic, serving to injure tissues distal to the site of original insult. This review describes select mediators in the exacerbatory relationship between oxidative stress, inflammation, and CKD. This review also discusses oxidative stress, inflammation, and CKD as they pertain to the development and progression of common CKD-associated comorbidities. Lastly, the utility of several widely accessible and cost-effective lifestyle interventions and their ability to reduce oxidative stress and inflammation are discussed and recommendations for future research are provided.
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Cruzat VF, Krause M, Newsholme P. Amino acid supplementation and impact on immune function in the context of exercise. J Int Soc Sports Nutr 2014; 11:61. [PMID: 25530736 PMCID: PMC4272512 DOI: 10.1186/s12970-014-0061-8] [Citation(s) in RCA: 92] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2014] [Accepted: 12/04/2014] [Indexed: 01/16/2023] Open
Abstract
Moderate and chronic bouts of exercise may lead to positive metabolic, molecular, and morphological adaptations, improving health. Although exercise training stimulates the production of reactive oxygen species (ROS), their overall intracellular concentration may not reach damaging levels due to enhancement of antioxidant responses. However, inadequate exercise training (i.e., single bout of high-intensity or excessive exercise) may result in oxidative stress, muscle fatigue and muscle injury. Moreover, during the recovery period, impaired immunity has been reported, for example; excessive-inflammation and compensatory immunosuppression. Nutritional supplements, sometimes referred to as immuno-nutrients, may be required to reduce immunosuppression and excessive inflammation. Herein, we discuss the action and the possible targets of key immuno-nutrients such as L-glutamine, L-arginine, branched chain amino acids (BCAA) and whey protein.
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Affiliation(s)
- Vinicius Fernandes Cruzat
- CHIRI Biosciences Research Precinct, Faculty of Health Sciences, School of Biomedical Sciences, Curtin University, GPO Box U1987, Perth, Western Australia Australia
| | - Maurício Krause
- Laboratory of Cellular Physiology, Department of Physiology, Institute of Basic Health Sciences, Federal University of Rio Grande do Sul, Porto Alegre, RS Brazil
| | - Philip Newsholme
- CHIRI Biosciences Research Precinct, Faculty of Health Sciences, School of Biomedical Sciences, Curtin University, GPO Box U1987, Perth, Western Australia Australia
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Krause M, Rodrigues-Krause J, O'Hagan C, Medlow P, Davison G, Susta D, Boreham C, Newsholme P, O'Donnell M, Murphy C, De Vito G. The effects of aerobic exercise training at two different intensities in obesity and type 2 diabetes: implications for oxidative stress, low-grade inflammation and nitric oxide production. Eur J Appl Physiol 2014; 114:251-60. [PMID: 24233244 DOI: 10.1007/s00421-013-2769-6] [Citation(s) in RCA: 78] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2013] [Accepted: 10/30/2013] [Indexed: 12/25/2022]
Abstract
AIMS To investigate the effect of 16 weeks of aerobic training performed at two different intensities on nitric oxide (tNOx) availability and iNOS/nNOS expression, oxidative stress (OS) and inflammation in obese humans with or without type 2 diabetes mellitus (T2DM). METHODS Twenty-five sedentary, obese (BMI > 30 kg/m2) males (52.8 ± 7.2 years); 12 controls versus 13 T2DM were randomly allocated to four groups that exercised for 30 min, three times per week either at low (Fat-Max; 30-40% VO(2max)) or moderate (T(vent); 55-65 % VO(2max)) intensity. Before and after training, blood and muscle samples (v. lateralis) were collected. RESULTS Baseline erythrocyte glutathione was lower (21.8 ± 2.8 vs. 32.7 ± 4.4 nmol/ml) and plasma protein oxidative damage and IL-6 were higher in T2DM (141.7 ± 52.1 vs. 75.5 ± 41.6 nmol/ml). Plasma catalase increased in T2DM after T(vent) training (from 0.98 ± 0.22 to 1.96 ± 0.3 nmol/min/ml). T2DM groups demonstrated evidence of oxidative damage in response to training (elevated protein carbonyls). Baseline serum tNOx were higher in controls than T2DM (18.68 ± 2.78 vs. 12.34 ± 3.56 μmol/l). Training at T(vent) increased muscle nNOS and tNOx in the control group only. Pre-training muscle nNOS was higher in controls than in T2DMs, while the opposite was found for iNOS. No differences were found after training for plasma inflammatory markers. CONCLUSION Exercise training did not change body composition or aerobic fitness, but improved OS markers, especially when performed at T(vent). Non-diabetics responded to T(vent) training by increasing muscle nNOS expression and tNOx levels in skeletal muscle while these parameters did not change in T2DM, perhaps due to higher insulin resistance (unchanged after intervention).
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Merino J, Ferré R, Girona J, Aguas D, Cabré A, Plana N, Vinuesa A, Ibarretxe D, Basora J, Buixadera C, Masana L. Physical activity below the minimum international recommendations improves oxidative stress, ADMA levels, resting heart rate and small artery endothelial function. CLINICA E INVESTIGACION EN ARTERIOSCLEROSIS 2014; 27:9-16. [PMID: 25112554 DOI: 10.1016/j.arteri.2014.04.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2014] [Accepted: 04/29/2014] [Indexed: 11/28/2022]
Abstract
BACKGROUND A moderate level of physical activity (PA), such as a daily 30-min walk, reduces cardiovascular risk. There is a lack of evidence about the cardiovascular benefits of PA below this recommendation of minimum PA level. OBJECTIVE We aimed to study the impact of a lower level of PA on cardiovascular health. DESIGN Sixty-four overweight/obese men and women were enrolled in a community programme consisting of 4 months of 1h, low-intensity PA two days per week. Before and after the intervention, PA level (METs/h/wk), endogenous antioxidant status (SOD and GPX concentration and activity and oxidised LDL), ADMA concentrations, endothelial function by small artery reactive hyperaemia index (saRHI), and resting heart rate (RHR) were assessed. RESULTS After the intervention, significant increases in saRHI (P=0.031), SOD and GPX activities, and a decrease in ADMA plasma concentrations, and RHR (P<0.001 for all) were observed. Increases in PA were positively associated with increases in saRHI (r=0.341, P=0.022), GPx (r=0.303, P=0.047) and decreases in RHR (r=-0.302, P=0.047). Multivariate analyses showed that independent predictors of saRHI improvement were an increase in PA (2.65, 95%CI: 1.21-4.01), decrease in RHR (1.91, 95%CI: 1.01-4.98), and an increase in GPx (2.61, 95%CI: 1.16-5.01). CONCLUSION In obese and overweight men and women, an increase in PA, even below the minimal international recommendations, improves antioxidant capacity, RHR and peripheral small artery reactivity.
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Affiliation(s)
- J Merino
- Vascular Medicine and Metabolism Unit and Research Unit on Lipids and Atherosclerosis, Sant Joan University Hospital, IISPV, Rovira i Virgili University, Reus, Tarragona, Spain; Spanish Biomedical Research Network in Diabetes and Associated Metabolic Disorders (CIBERDEM), Barcelona, Spain.
| | - R Ferré
- Vascular Medicine and Metabolism Unit and Research Unit on Lipids and Atherosclerosis, Sant Joan University Hospital, IISPV, Rovira i Virgili University, Reus, Tarragona, Spain; Spanish Biomedical Research Network in Diabetes and Associated Metabolic Disorders (CIBERDEM), Barcelona, Spain
| | - J Girona
- Vascular Medicine and Metabolism Unit and Research Unit on Lipids and Atherosclerosis, Sant Joan University Hospital, IISPV, Rovira i Virgili University, Reus, Tarragona, Spain; Spanish Biomedical Research Network in Diabetes and Associated Metabolic Disorders (CIBERDEM), Barcelona, Spain
| | - D Aguas
- Reus Esport i Lleure, Ajuntament de Reus, Reus, Tarragona, Spain
| | - A Cabré
- Vascular Medicine and Metabolism Unit and Research Unit on Lipids and Atherosclerosis, Sant Joan University Hospital, IISPV, Rovira i Virgili University, Reus, Tarragona, Spain; Spanish Biomedical Research Network in Diabetes and Associated Metabolic Disorders (CIBERDEM), Barcelona, Spain
| | - N Plana
- Vascular Medicine and Metabolism Unit and Research Unit on Lipids and Atherosclerosis, Sant Joan University Hospital, IISPV, Rovira i Virgili University, Reus, Tarragona, Spain; Spanish Biomedical Research Network in Diabetes and Associated Metabolic Disorders (CIBERDEM), Barcelona, Spain
| | - A Vinuesa
- Atención Primaria, Institut Català de la Salut, Tarragona, Spain; Institut d'Investigació en Atenció Primària IDIAP Jordi Gol, Catalunya, Spain
| | - D Ibarretxe
- Vascular Medicine and Metabolism Unit and Research Unit on Lipids and Atherosclerosis, Sant Joan University Hospital, IISPV, Rovira i Virgili University, Reus, Tarragona, Spain; Spanish Biomedical Research Network in Diabetes and Associated Metabolic Disorders (CIBERDEM), Barcelona, Spain
| | - J Basora
- Atención Primaria, Institut Català de la Salut, Tarragona, Spain; Institut d'Investigació en Atenció Primària IDIAP Jordi Gol, Catalunya, Spain
| | - C Buixadera
- Vascular Medicine and Metabolism Unit and Research Unit on Lipids and Atherosclerosis, Sant Joan University Hospital, IISPV, Rovira i Virgili University, Reus, Tarragona, Spain; Spanish Biomedical Research Network in Diabetes and Associated Metabolic Disorders (CIBERDEM), Barcelona, Spain
| | - L Masana
- Vascular Medicine and Metabolism Unit and Research Unit on Lipids and Atherosclerosis, Sant Joan University Hospital, IISPV, Rovira i Virgili University, Reus, Tarragona, Spain; Spanish Biomedical Research Network in Diabetes and Associated Metabolic Disorders (CIBERDEM), Barcelona, Spain
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Elevated levels of extracellular heat-shock protein 72 (eHSP72) are positively correlated with insulin resistance in vivo and cause pancreatic β-cell dysfunction and death in vitro. Clin Sci (Lond) 2014; 126:739-52. [PMID: 24325467 DOI: 10.1042/cs20130678] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
eHSP72 (extracellular heat-shock protein 72) is increased in the plasma of both types of diabetes and is positively correlated with inflammatory markers. Since aging is associated with a low-grade inflammation and IR (insulin resistance), we aimed to: (i) analyse the concentration of eHSP72 in elderly people and determine correlation with insulin resistance, and (ii) determine the effects of eHSP72 on β-cell function and viability in human and rodent pancreatic β-cells. Fasting blood samples were collected from 50 older people [27 females and 23 males; 63.4±4.4 years of age; BMI (body mass index)=25.5±2.7 kg/m2]. Plasma samples were analysed for eHSP72, insulin, TNF (tumour necrosis factor)-α, leptin, adiponectin and cortisol, and glycaemic and lipid profile. In vitro studies were conducted using rodent islets and clonal rat and human pancreatic β-cell lines (BRIN-BD11 and 1.1B4 respectively). Cells/islets were incubated for 24 h with eHSP72 (0, 0.2, 4, 8 and 40 ng/ml). Cell viability was measured using three different methods. The impact of HSP72 on β-cell metabolic status was determined using Seahorse Bioscience XFe96 technology. To assess whether the effects of eHSP72 were mediated by Toll-like receptors (TLR2/TLR4), we co-incubated rodent islets with eHSP72 and the TLR2/TLR4 inhibitor OxPAPC (oxidized 1-palmitoyl-2-arachidonoyl-sn-glycero-3-phosphocholine; 30 μg/ml). We found a positive correlation between plasma eHSP72 and HOMA-IR (homoeostasis model assessment of IR) (r=0.528, P<0.001), TNF-α (r=0.389, P<0.014), cortisol (r=0.348, P<0.03) and leptin/adiponectin (r=0.334, P<0.03). In the in vitro studies, insulin secretion was decreased in an eHSP72 dose-dependent manner in BRIN-BD11 cells (from 257.7±33 to 84.1±10.2 μg/mg of protein per 24 h with 40 ng/ml eHSP72), and in islets in the presence of 40 ng/ml eHSP72 (from 0.48±0.07 to 0.33±0.009 μg/20 islets per 24 h). Similarly, eHSP72 reduced β-cell viability (at least 30% for BRIN-BD11 and 10% for 1.1B4 cells). Bioenergetic studies revealed that eHSP72 altered pancreatic β-cell metabolism. OxPAPC restored insulin secretion in islets incubated with 40 ng/ml eHSP72. In conclusion, we have demonstrated a positive correlation between eHSP72 and IR. In addition, we suggest that chronic eHSP72 exposure may mediate β-cell failure.
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Chadderdon SM, Belcik JT, Bader L, Kirigiti MA, Peters DM, Kievit P, Grove KL, Lindner JR. Proinflammatory endothelial activation detected by molecular imaging in obese nonhuman primates coincides with onset of insulin resistance and progressively increases with duration of insulin resistance. Circulation 2013; 129:471-8. [PMID: 24163066 DOI: 10.1161/circulationaha.113.003645] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
BACKGROUND Inflammation and insulin resistance (IR) are associated processes that potentiate risk for cardiovascular disease in obesity. The temporal relation between IR and inflammation is not completely characterized. We hypothesized that endothelial cell adhesion molecule expression in large arteries is an early event that coincides with diet-induced obesity and IR in primates. METHODS AND RESULTS Ten adult male rhesus macaques were studied at baseline and every 4 to 6 months on a high-fat diet for 2 years. Truncal fat, carotid intima-media thickness, plasma inflammatory biomarkers, and carotid P-selectin and vascular cell adhesion molecule-1 expression by contrast-enhanced ultrasound molecular imaging were assessed. Intravenous glucose tolerance test was performed at baseline and at 4 and 18 months. A high-fat diet produced a rapid increase (P<0.01) in weight, truncal fat, and degree of IR indicated by the insulin area under the curve and glucose disappearance rate on intravenous glucose tolerance test, all of which worsened minimally thereafter. Molecular imaging detected a progressive increase in endothelial cell adhesion molecule expression over time (5- to 7-fold greater than control agent signal at 2 years; P<0.01). Changes in intima-media thickness were not detected until 2 years and, although there was a trend toward an increase in plasma markers of inflammation (monocyte chemotactic protein-1, C-reactive protein), the pattern of increase varied considerably over time. CONCLUSIONS In primates with diet-induced obesity, endothelial inflammatory activation is an early event that occurs coincident with the development of IR and long before any measurable change in carotid intima-media thickness. Endothelial activation is related more to the duration rather than to the severity of IR and is not mirrored by changes in plasma biomarkers.
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Affiliation(s)
- Scott M Chadderdon
- From Knight Cardiovascular Institute, Oregon Health and Science University (S.M.C., J.T.B., D.M.P., J.R.L.), and Oregon National Primate Research Center (L.B., M.A.K., P.K., K.L.G.), Portland, OR
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Even low physical activity levels improve vascular function in overweight and obese postmenopausal women. Menopause 2013; 20:1036-42. [DOI: 10.1097/gme.0b013e31828501c9] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Guerrero F, Thioub S, Goanvec C, Theunissen S, Feray A, Balestra C, Mansourati J. Effect of tetrahydrobiopterin and exercise training on endothelium-dependent vasorelaxation in SHR. J Physiol Biochem 2013; 69:277-87. [PMID: 23011782 DOI: 10.1007/s13105-012-0210-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2012] [Accepted: 09/05/2012] [Indexed: 12/13/2022]
Abstract
We examined whether the improvement of impaired NO-dependent vasorelaxation by exercise training could be mediated through a BH4-dependent mechanism. Male spontaneously hypertensive rats (SHR, n = 20) and Wistar-Kyoto rats (WKY, n = 20) were trained (Tr) for 9 weeks on a treadmill and compared to age-matched sedentary animals (Sed). Endothelium-dependent vasorelaxation (EDV) was assessed with acetylcholine by measuring isometric tension in rings of femoral artery precontracted with 10(-5) M phenylephrine. EDV was impaired in SHR-Sed as compared to WKY-Sed (p = 0.02). Training alone improved EDV in both WKY (p = 0.01) and SHR (p = 0.0001). Moreover, EDV was not different in trained SHR than in trained WKY (p = 0.934). Pretreatment of rings with L-NAME (50 μM) cancelled the difference in ACh-induced relaxation between all groups, suggesting that NO pathway is involved in these differences. The presence of 10(-5) M BH4 in the organ bath significantly improved EDV for sedentary SHR (p = 0.030) but not WKY group (p = 0.815). Exercise training turned the beneficial effect of BH4 on SHR to impairment of ACh-induced vasorelaxation in both SHR-Tr (p = 0.01) and WKY-Tr groups (p = 0.04). These results suggest that beneficial effect of exercise training on endothelial function is due partly to a BH4-dependent mechanism in established hypertension.
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Affiliation(s)
- François Guerrero
- European University of Britany, University of Brest, EA4324 ORPHY, 6 avenue Le Gorgeu, CS 93837, 29238, Brest, France,
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Rodrigues-Krause J, Krause M, Cunha GDS, Perin D, Martins JB, Alberton CL, Schaun MI, De Bittencourt PIH, Reischak-Oliveira A. Ballet dancers cardiorespiratory, oxidative and muscle damage responses to classes and rehearsals. Eur J Sport Sci 2013; 14:199-208. [PMID: 23679120 DOI: 10.1080/17461391.2013.777796] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
This study aimed to describe and compare ballet dancers' cardiorespiratory responses, muscle damage and oxidative stress levels during a ballet class (practice of isolated ballet exercises performed with barre/hand-rail support and across-the-floor movements to improve technical skills) and rehearsal (practice of ballet choreography involving technical-artistic skills to improve dancers' performance for shows). The 12 advanced female ballet dancers undertook three exercise sessions: maximum effort test, class and rehearsal. Heart rate (HR) and oxygen consumption (VO2) were continuously measured. Lactate was determined before 15 min and after class and rehearsal. Blood was sampled pre, post and 48 h after class and rehearsal for creatine kinase (CK), lipid peroxides (LPO) and glutathione analysis (GSSG/GSH). Class was of lower intensity than rehearsal as shown by VO2, HR and lactate values: VO2 (mL.kg(-1).min(-1)): 14.5±2.1 vs. 19.1±1.7 (p < 0.001); HR (bpm.min(-1)): 145.7±17.9 vs. 174.5±13.8 (p < 0.001); lactate (mmol.L(-1)): 4.2±1.1 vs. 5.5±2.7 (p = 0.049). CK (IU) increased following class and rehearsal, remaining high 48 h after: class (pre = 109.3±48.5; post = 144±60; 48 h = 117.2±64.6); rehearsal (pre = 78.6±52.1; post = 122±70.7; 48 h = 104.9±89.5). LPO (µM) increased from pre-class (1.27±0.19) to post-class (1.41±0.19) and went down after 48 h (1.20±0.22). No LPO time-course changes followed the rehearsal. GSSG/GSH decreased 48 h after class and rehearsal. Greater increases in LPO post-class suggest it promotes CK release by an oxidative membrane-damage mechanism. Physiological increases of LPO and CK in class indicate it prepares the dancers for exercise-induced oxidative stress and muscle damage during rehearsals. Ballet dancers' muscle damage and oxidative stress responses seem not to be dependent on exercise intensity based on VO2 responses.
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de Castro Barbosa T, Jiang LQ, Zierath JR, Nunes MT. L-Arginine enhances glucose and lipid metabolism in rat L6 myotubes via the NO/ c-GMP pathway. Metabolism 2013; 62:79-89. [PMID: 22889511 DOI: 10.1016/j.metabol.2012.06.011] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/27/2012] [Revised: 06/27/2012] [Accepted: 06/27/2012] [Indexed: 11/17/2022]
Abstract
OBJECTIVE The amino acid Arginine (Arg) is the main biological precursor of nitric oxide (NO) and has been described to improve insulin sensitivity in diabetes and obesity. We investigated the molecular mechanisms involved in the long-term effects of Arg on glucose and lipid metabolism. MATERIALS AND METHODS L6 myotubes were treated with Arg (7 mmol/L) for 6 days. D-Mannitol (7 mmol/L) was used as control; spermine NONOate (10 μmol/L) and L-NAME (100 μmol/L) were used to evaluate the NO/c-GMP pathway role. Basal and insulin-induced (120 nmol/L) glycogen synthesis, glucose uptake and lipid oxidation, c-GMP and nitrite levels, and the intracellular signaling pathways were evaluated. RESULTS Arg-treatment increased: 1) basal and insulin-stimulated glycogen synthesis; 2) glucose uptake; 3) palmitate oxidation; 4) p-Akt (Ser(473)), total and plasma membrane GLUT4 content, total and p-AMPK-α and p-ACC (Ser(79)), p-GSK-3α/β (Ser(21/9)) and 5) nitrite and c-GMP levels. L-NAME treatment suppressed Arg effects on: 1) nitrite and c-GMP content; 2) glycogen synthesis and glucose uptake; 3) basal and insulin-stimulated p-Akt (Ser(473)), total and p-AMPK-α and ACC, and nNOS expression. CONCLUSION We provide evidence that Arg improves glucose and lipid metabolism in skeletal muscle, in parallel with increased phosphorylation of Akt and AMPK-α. These effects were mediated by the NO/c-GMP pathway. Thus, arginine treatment enhances signal transduction and has a beneficial effect of metabolism in skeletal muscle through direct activation of Akt and AMPK pathways.
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Affiliation(s)
- Thais de Castro Barbosa
- Department of Physiology and Biophysics, Institute of Biomedical Sciences, University of Sao Paulo, Sao Paulo, Brazil
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Redox homeostasis in pancreatic β cells. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2012; 2012:932838. [PMID: 23304259 PMCID: PMC3532876 DOI: 10.1155/2012/932838] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/13/2012] [Accepted: 10/30/2012] [Indexed: 12/20/2022]
Abstract
We reviewed mechanisms that determine reactive oxygen species (redox) homeostasis, redox information signaling and metabolic/regulatory function of autocrine insulin signaling in pancreatic β cells, and consequences of oxidative stress and dysregulation of redox/information signaling for their dysfunction. We emphasize the role of mitochondrion in β cell molecular physiology and pathology, including the antioxidant role of mitochondrial uncoupling protein UCP2. Since in pancreatic β cells pyruvate cannot be easily diverted towards lactate dehydrogenase for lactate formation, the respiration and oxidative phosphorylation intensity are governed by the availability of glucose, leading to a certain ATP/ADP ratio, whereas in other cell types, cell demand dictates respiration/metabolism rates. Moreover, we examine the possibility that type 2 diabetes mellitus might be considered as an inevitable result of progressive self-accelerating oxidative stress and concomitantly dysregulated information signaling in peripheral tissues as well as in pancreatic β cells. It is because the redox signaling is inherent to the insulin receptor signaling mechanism and its impairment leads to the oxidative and nitrosative stress. Also emerging concepts, admiting participation of redox signaling even in glucose sensing and insulin release in pancreatic β cells, fit in this view. For example, NADPH has been firmly established to be a modulator of glucose-stimulated insulin release.
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Krause M, Rodrigues-Krause J, O'Hagan C, De Vito G, Boreham C, Susta D, Newsholme P, Murphy C. Differential nitric oxide levels in the blood and skeletal muscle of type 2 diabetic subjects may be consequence of adiposity: a preliminary study. Metabolism 2012; 61:1528-37. [PMID: 22683098 DOI: 10.1016/j.metabol.2012.05.003] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/05/2012] [Revised: 04/24/2012] [Accepted: 05/02/2012] [Indexed: 12/21/2022]
Abstract
BACKGROUND AND AIMS Nitric oxide (NO·) exerts key regulatory functions including vasodilation and glucose uptake. Thus reduced NO· levels are associated with insulin resistance and hypertension. In this preliminary work we aimed to measure the levels of NO· metabolites in serum and skeletal muscle of obese and non-obese subjects, with or without type 2 diabetes mellitus (T2DM). METHODS Fifteen sedentary male participants [7 obese controls (C) vs 5 obese and 3 non-obese T2DM; age 54±9 years] were selected according to their BMI (>30 kg/m(2) for obese and 23-27 kg/m(2) for non-obese participants) and evaluated for fasted values of blood glucose, HbA1c, lipid profile, serum CRP (C-reactive protein), erythrocyte glutathione (GSH) metabolism, plasma adiponectin, leptin and cytokines (TNF-α and INFγ), serum and skeletal muscle nitric oxide metabolites (nitrite and nitrates; tNOx) and skeletal muscle nNOS and iNOS expression. Body composition was measured by whole body DEXA and muscle microbiopsy was performed in the vastus lateralis. RESULTS We found that serum tNOx (total nitrite/nitrate; μmol/L) was lower in obese T2DM group (12.7±3.5) when compared with their controls (21.1±2.4), although the non-obese group presented higher concentration of tNOx (33.8±7.2). Skeletal muscle nNOS was higher in obese controls, lower in non-obese T2DM and undetected in obese T2DM. On the other hand, expression of iNOS had an inverse relationship with nNOS, showing higher expression in obese T2DM, decrease in non-obese T2DM and absence in obese control group. tNOx levels (μmol/mg protein) were decreased in the non-obese T2DM group (12.07±0.59) when compared with the obese control (21.68±6.2) and the obese T2DM group (26.3±7.26). CONCLUSION We conclude that the decreased serum NO∙ production in obese T2DM patients seems to be associated with adipose mass as lower adiposity was associated with normal NO∙ which was reduced in the skeletal muscle of the non-obese T2DM patients. We suggest that the lower adiposity (and higher adiponectin) in non-obese T2DM could be responsible for differential levels of NO∙ production and insulin resistance.
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Affiliation(s)
- Mauricio Krause
- Biomedical Research Group, Department of Science, Institute of Technology Tallaght Dublin, Ireland.
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Galal O, Podlogar J, Verspohl EJ. Impact of ADMA (asymmetric dimethylarginine) on physiology with respect to diabetes mellitus and respiratory system BEAS-2B cells (human bronchial epithelial cells). ACTA ACUST UNITED AC 2012; 65:253-63. [PMID: 23278693 DOI: 10.1111/j.2042-7158.2012.01590.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2011] [Accepted: 08/12/2012] [Indexed: 11/27/2022]
Abstract
OBJECTIVES Asymmetric dimethylarginine (ADMA) is a non-selective nitric oxide (NO) synthase inhibitor associated with cardiovascular and metabolic disorders. This study aimed to investigate ADMA with respect to both diabetes and respiratory disease. METHODS Glucose was determined by hexokinase method, insulin by a radioimmunoassay. Griess test was used for NO assay and cytokinines were assayed by ELISA. Ciliary beat frequency was determined by high speed video using a microscope. KEY FINDINGS ADMA induced an increase in blood glucose and plasma insulin levels in rats; the ratio of these effects indicates the induction of a diabetic situation (insulin resistance). L-arginine increased blood glucose and initially slightly decreased plasma insulin. A pretreatment with ADMA abolished these effects. ADMA shows similar effects in vitro (insulin-secreting cell line, INS-1 cells). L-arginine increased production of NO, which was reversed by ADMA (INS-1 cells). ADMA also reduced NO production positively modulated by various substances, namely metformin, ciglitazone, losartan and nateglinide, but nevertheless inhibited insulin release induced by these compounds. ADMA stimulated the production of cytokines such as interleukin (IL-6) and macrophage inflammatory protein-2 (MIP-2) (rat IL-8 analogue) from INS-1 cells. 5-Aminoimidazole-4-carboxamide-1-β-4-ribofuranoside (AICAR), a direct adenosine monophosphate protein kinase (AMPK) activator and anti-inflammatory agent, induced NO production and reduced cytokine release. In contrast to diabetes parameters, ADMA had no effect of on the respiratory system (cytokine secretion from BEAS-2B cells (IL-8, regulated on activation, normal T cell expressed and secreted, and tumour necrosis factor-α), ciliary beat frequency and smooth muscle contraction of rat trachea). CONCLUSIONS ADMA has a pathophysiological impact leading to a diabetic situation but has no impact on the respiratory system.
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Affiliation(s)
- Omneya Galal
- Department of Pharmacology, Inst Medicinal Chem, Muenster, Germany
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Gounder SS, Kannan S, Devadoss D, Miller CJ, Whitehead KS, Odelberg SJ, Firpo MA, Paine R, Hoidal JR, Abel ED, Rajasekaran NS. Impaired transcriptional activity of Nrf2 in age-related myocardial oxidative stress is reversible by moderate exercise training. PLoS One 2012; 7:e45697. [PMID: 23029187 PMCID: PMC3454427 DOI: 10.1371/journal.pone.0045697] [Citation(s) in RCA: 115] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2012] [Accepted: 08/22/2012] [Indexed: 01/31/2023] Open
Abstract
Aging promotes accumulation of reactive oxygen/nitrogen species (ROS/RNS) in cardiomyocytes, which leads to contractile dysfunction and cardiac abnormalities. These changes may contribute to increased cardiovascular disease in the elderly. Inducible antioxidant pathways are regulated by nuclear erythroid 2 p45-related factor 2 (Nrf2) through antioxidant response cis-elements (AREs) and are impaired in the aging heart. Whereas acute exercise stress (AES) activates Nrf2 signaling and promotes myocardial antioxidant function in young mice (∼2 months), aging mouse (>23 months) hearts exhibit significant oxidative stress as compared to those of the young. The purpose of this study was to investigate age-dependent regulation of Nrf2-antioxidant mechanisms and redox homeostasis in mouse hearts and the impact of exercise. Old mice were highly susceptible to oxidative stress following high endurance exercise stress (EES), but demonstrated increased adaptive redox homeostasis after moderate exercise training (MET; 10m/min, for 45 min/day) for ∼6 weeks. Following EES, transcription and protein levels for most of the ARE-antioxidants were increased in young mice but their induction was blunted in aging mice. In contrast, 6-weeks of chronic MET promoted nuclear levels of Nrf2 along with its target antioxidants in the aging heart to near normal levels as seen in young mice. These observations suggest that enhancing Nrf2 function and endogenous cytoprotective mechanisms by MET, may combat age-induced ROS/RNS and protect the myocardium from oxidative stress diseases.
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Affiliation(s)
- Sellamuthu S. Gounder
- Divisions of Cardiology and Pulmonary, Department of Internal Medicine, University of Utah Health Sciences Center, Salt Lake City, Utah, United States of America
| | - Sankaranarayanan Kannan
- Department of Pediatric Research, University of Texas M. D. Anderson Cancer Center, Houston, Texas, United States of America
| | - Dinesh Devadoss
- Divisions of Cardiology and Pulmonary, Department of Internal Medicine, University of Utah Health Sciences Center, Salt Lake City, Utah, United States of America
| | - Corey J. Miller
- Divisions of Cardiology and Pulmonary, Department of Internal Medicine, University of Utah Health Sciences Center, Salt Lake City, Utah, United States of America
| | - Kevin S. Whitehead
- Divisions of Cardiology and Pulmonary, Department of Internal Medicine, University of Utah Health Sciences Center, Salt Lake City, Utah, United States of America
| | - Shannon J. Odelberg
- Divisions of Cardiology and Pulmonary, Department of Internal Medicine, University of Utah Health Sciences Center, Salt Lake City, Utah, United States of America
| | - Matthew A. Firpo
- Department of General Surgery, University of Utah Health Sciences Center, Salt Lake City, Utah, United States of America
| | - Robert Paine
- Division of Pulmonary, Department of Internal Medicine, University of Utah Health Sciences Center, Salt Lake City, Utah, United States of America
| | - John R. Hoidal
- Division of Pulmonary, Department of Internal Medicine, University of Utah Health Sciences Center, Salt Lake City, Utah, United States of America
| | - E. Dale Abel
- Division of Endocrinology, Department of Internal Medicine, University of Utah Health Sciences Center, Salt Lake City, Utah, United States of America
| | - Namakkal S. Rajasekaran
- Divisions of Cardiology and Pulmonary, Department of Internal Medicine, University of Utah Health Sciences Center, Salt Lake City, Utah, United States of America
- * E-mail:
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da Silva Krause M, Bittencourt A, Homem de Bittencourt PI, McClenaghan NH, Flatt PR, Murphy C, Newsholme P. Physiological concentrations of interleukin-6 directly promote insulin secretion, signal transduction, nitric oxide release, and redox status in a clonal pancreatic β-cell line and mouse islets. J Endocrinol 2012; 214:301-11. [PMID: 22761278 DOI: 10.1530/joe-12-0223] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Interleukin-6 (IL6) has recently been reported to promote insulin secretion in a glucagon-like peptide-1-dependent manner. Herein, the direct effects of IL6 (at various concentrations from 0 to 1000 pg/ml) on pancreatic β-cell metabolism, AMP-activated protein kinase (AMPK) signaling, insulin secretion, nitrite release, and redox status in a rat clonal β-cell line and mouse islets are reported. Chronic insulin secretion (in μg/mg protein per 24 h) was increased from 128·7±7·3 (no IL6) to 178·4±7·7 (at 100 pg/ml IL6) in clonal β-cells and increased significantly in islets incubated in the presence of 5·5 mM glucose for 2 h, from 0·148 to 0·167±0·003 ng/islet. Pretreatment with IL6 also induced a twofold increase in basal and nutrient-stimulated insulin secretion in subsequent 20 min static incubations. IL6 enhanced both glutathione (GSH) and glutathione disulphide (GSSG) by nearly 20% without changing intracellular redox status (GSSG/GSH). IL6 dramatically increased iNOS expression (by ca. 100-fold) with an accompanying tenfold rise in nitrite release in clonal β-cells. Phosphorylated AMPK levels were elevated approximately twofold in clonal β-cells and mouse islet cells. Calmodulin-dependent protein kinase kinase levels (CaMKK), an upstream kinase activator of AMPK, were also increased by 50% after IL6 exposure (in β-cells and islets). Our data have demonstrated that IL6 can stimulate β-cell-dependent insulin secretion via direct cell-based mechanisms. AMPK, CaMKK (an upstream kinase activator of AMPK), and the synthesis of nitric oxide appear to alter cell metabolism to benefit insulin secretion. In summary, IL6 exerts positive effects on β-cell signaling, metabolism, antioxidant status, and insulin secretion.
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