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Exercise Affects T-Cell Function by Modifying Intracellular Calcium Homeostasis.

Renyi Liu1, Wei Fan, Karsten Krüger

  • 11Department of Sports Medicine, Institute of Sports Sciences, Justus-Liebig-University Giessen, Giessen, GERMANY; 2Department of Physical Education, China University of Geosciences (Wuhan), Wuhan, CHINA; 3Institute for Anatomy and Cell Biology II, Justus-Liebig-University Giessen, Giessen, GERMANY; 4Universities of Giessen and Marburg Lung Center (UGMLC), Excellencecluster Cardio-Pulmonary System (ECCPS), Member of the German Lung Center (DZL), Justus-Liebig-University Giessen, Giessen, GERMANY; and 5Institute of Animal Nutrition and Nutrition Physiology, Justus-Liebig-University Giessen, Giessen, GERMANY.

Medicine and Science in Sports and Exercise
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PubMed
Summary
This summary is machine-generated.

Chronic moderate exercise enhances intracellular calcium signaling in mouse T lymphocytes, leading to improved cell proliferation. Gene expression related to calcium regulation is downregulated, possibly as a protective response.

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Area of Science:

  • Immunology
  • Exercise Physiology
  • Cell Biology

Background:

  • Intracellular calcium signaling is crucial for T lymphocyte function.
  • Exercise impacts immune cell activity, but its specific effects on T cell calcium regulation are not fully understood.

Purpose of the Study:

  • To investigate the effects of chronic moderate exercise on intracellular calcium signaling in murine splenic T lymphocytes.
  • To determine the link between exercise-induced calcium signaling changes and T lymphocyte proliferation capacity.

Main Methods:

  • Male mice were divided into control and exercise groups for 3 months.
  • Intracellular calcium levels were measured using Fura-2(AM) and fluorescence spectrometry.
  • T cell proliferation was assessed via flow cytometry and CFSE labeling.
  • Quantitative PCR was used to analyze the expression of calcium-regulating genes.

Main Results:

  • Exercise group mice exhibited significantly higher basal and stimulated intracellular calcium levels.
  • Mitogen-induced proliferation of T cells was significantly increased in the exercise group.
  • mRNA expression of key calcium-regulating genes (e.g., STIM1, ORAI1, MCU) was significantly downregulated in exercise mice.

Conclusions:

  • Chronic moderate exercise positively modulates intracellular calcium signaling in murine splenic T lymphocytes.
  • Enhanced calcium signaling correlates with improved T cell proliferation.
  • Downregulation of calcium homeostasis-related genes may represent a compensatory mechanism to manage elevated intracellular calcium.