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Impaired Activity of Ryanodine Receptors Contributes to Calcium Mishandling in Cardiomyocytes of Metabolic Syndrome Rats
Conclusion Principal findings of this work are that abnormal Ca2+ transient amplitude, contractile dysfunction; and impaired relaxation of MetS cardiomyocytes underlies intrinsic dysfunctional RyR2 and SERCA pump. Abnormal activity of RyRs was evidenced by its decreased ability to bind [3H]-ryanodine. Although the MetS condition does not modify RyR2 protein expression, its phosphorylation at Ser2814 is decreased, which impairs its capacity for activation during ECC. The dysfunctional RyRs, together with a decreased activity of SERCA pump due to decreased Thr17-PLN phosphorylation suggest a downregulation of CaMKII in MetS...
Source: Frontiers in Physiology - April 29, 2019 Category: Physiology Source Type: research

Neuromuscular and Muscle Metabolic Functions in MELAS Before and After Resistance Training: A Case Study
Conclusion To conclude, this study suggests a preserved plasticity in the skeletal muscle of a patient with MELAS. More importantly, Resistance Training appears to be a safe and effective method to increase skeletal muscle function in this patient population, and this effect is mediated by both neuromuscular and mitochondrial adaptations. However, particular attention and caution is needed in the interpretation of the data of this single case study and further studies are warranted including larger sample of patients. Ethics Statement For this case study the participant caregiver provided written informed consent. Auth...
Source: Frontiers in Physiology - April 25, 2019 Category: Physiology Source Type: research

Plasma Metal Concentrations and Incident Coronary Heart Disease in Chinese Adults: The Dongfeng-Tongji Cohort
Conclusions: Our study suggested that incident CHD was positively associated with plasma levels of titanium and arsenic, and inversely associated with selenium. Additional research is needed to confirm these findings in other populations. https://doi.org/10.1289/EHP1521 Received: 22 December 2016 Revised: 17 September 2017 Accepted: 19 September 2017 Published: 19 October 2017 Address correspondence to T. Wu, or A. Pan, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, 13 Hongkong Rd., Wuhan 430030, Hubei, China. Telephone: +86-27-83692347. Email: wut@mails.tjmu.edu.cn or p...
Source: EHP Research - October 20, 2017 Category: Environmental Health Authors: Daniil Lyalko Tags: Research Source Type: research

Long-Term Exposure to Road Traffic Noise and Nitrogen Dioxide and Risk of Heart Failure: A Cohort Study
Conclusions: Long-term exposure to NO2 and road traffic noise was associated with higher risk of heart failure, mainly among men, in both single- and two-pollutant models. High exposure to both pollutants was associated with highest risk. https://doi.org/10.1289/EHP1272 Received: 25 October 2016 Revised: 09 August 2017 Accepted: 09 August 2017 Published: 26 September 2017 Address correspondence to M. Sørensen. Diet, Genes and Environment, Danish Cancer Society, Strandboulevarden 49, 2100 Copenhagen, Denmark. Telephone: +45 35257626. Email: mettes@cancer.dk Supplemental Material is available online (https://doi.org/1...
Source: EHP Research - September 26, 2017 Category: Environmental Health Authors: Daniil Lyalko Tags: Research Source Type: research