ArticleMolecular metabolism2026
IL-6 Activity is Required for Maximal Catecholamine Release During High-Intensity Exercise in Men.
Article in Molecular metabolism, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
High-intensity exercise triggers a coordinated activation of metabolic, endocrine, and immune pathways, yet the mechanisms integrating these responses remain incompletely understood. Interleukin-6 (IL-6), released during exercise, has been proposed as a systemic signal linking skeletal muscle activity to whole-body stress responses. We tested whether exercise-induced IL-6 is required for full sympathoadrenal activation and immune cell mobilization during intense exercise in humans. Healthy young men received the IL-6 receptor (IL-6R) antibody tocilizumab prior to high-intensity interval exercise. IL-6R blockade reduced circulating epinephrine by ∼50%, lowered plasma glucose levels, and attenuated lactate accumulation, resulting in a smaller decline in blood pH. Immune cell mobilization was selectively impaired, with reduced recruitment of lymphocytes, CD8
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