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A New Study Shows How Seriously Air Pollution Can Affect Your Heartbeat
For China’s 1.4 billion people, the simple act of breathing has long been something of a risk. Living in the ninth-dirtiest country in the world in terms of air quality, China’s residents lose an average of 2.6 years of life per capita due to atmospheric pollution alone. The greatest risk, of course, is pulmonary, with air pollution leading to shortness of breath, wheezing, coughing, asthma episodes, and chest pain. But pollution affects the heart too; the U.S. Environmental Protection Agency reports that exposure to fine-particulate matter as well as to nitrogen oxides alone can lead to premature aging in bloo...
Source: TIME: Health - May 1, 2023 Category: Consumer Health News Authors: Jeffrey Kluger Tags: Uncategorized climate change Climate Is Everything Environment healthscienceclimate Source Type: news

Atrial Transcriptional Profiles of Molecular Targets Mediating Electrophysiological Function in Aging and Pgc-1 β Deficient Murine Hearts
Conclusion: These findings limit the possible roles of gene transcriptional changes in previously reported age-dependent pro-arrhythmic electrophysiologial changes observed in Pgc-1β-/- atria to an altered Ca2+-ATPase (Atp2a2) expression. This directly parallels previously reported arrhythmic mechanism associated with p21-activated kinase type 1 deficiency. This could add to contributions from the direct physiological outcomes of mitochondrial dysfunction, whether through reactive oxygen species (ROS) production or altered Ca2+ homeostasis. Introduction Atrial arrhythmias constitute a major public health pro...
Source: Frontiers in Physiology - April 23, 2019 Category: Physiology Source Type: research