{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,14]],"date-time":"2026-10-14T22:27:13Z","timestamp":1792016833527,"version":"4.4.0"},"reference-count":45,"publisher":"Wiley","issue":"8","license":[{"start":{"date-parts":[[2024,4,30]],"date-time":"2024-04-30T00:00:00Z","timestamp":1714435200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["32200943"],"award-info":[{"award-number":["32200943"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["82072387"],"award-info":[{"award-number":["82072387"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Aging Cell"],"published-print":{"date-parts":[[2024,8]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>Postmenopausal osteoporosis is a prevalent metabolic bone disorder characterized by a decrease in bone mineral density and deterioration of bone microstructure. Despite the high prevalence of this disease, no effective treatment for osteoporosis has been developed. Exercise has long been considered a potent anabolic factor that promotes bone mass via upregulation of myokines secreted by skeletal muscle, exerting long\u2010term osteoprotective effects and few side effects. Irisin was recently identified as a novel myokine that is significantly upregulated by exercise and could increase bone mass. However, the mechanisms underlying exercise\u2010induced muscle\u2010bone crosstalk remain unclear. Here, we identified that polyunsaturated fatty acids (arachidonic acid and docosahexaenoic acid) are increased in skeletal muscles following a 10\u2010week treadmill exercise programme, which then promotes the expression and release of FNDC5\/irisin. In osteoblasts, irisin binds directly to Cav1, which recruits and interacts with AMP\u2010activated protein kinase \u03b1 (AMPK\u03b1) to activate the AMPK pathway. Nrf2 is the downstream target of the AMPK pathway and increases the transcription of HMOX1 and Fpn. HMOX1 is involved in regulating the cell cycle and promotes the proliferation of osteoblasts. Moreover, upregulation of Fpn in osteoblasts enhanced iron removal, thereby suppressing ferroptosis in osteoblasts. Additionally, we confirmed that myotube\u2010derived exosomes are involved in the transportation of irisin and enter osteoblasts through caveolae\u2010mediated endocytosis. In conclusion, our findings highlight the crucial role of irisin, present in myotube\u2010derived exosomes, as a crucial regulator of exercise\u2010induced protective effects on bone, which provides novel insights into the mechanisms underlying exercise\u2010dependent treatment of osteoporosis.<\/jats:p>","DOI":"10.1111\/acel.14181","type":"journal-article","created":{"date-parts":[[2024,5,1]],"date-time":"2024-05-01T01:05:23Z","timestamp":1714525523000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":62,"title":["Exerkine FNDC5\/irisin\u2010enriched exosomes promote proliferation and inhibit ferroptosis of osteoblasts through interaction with Caveolin\u20101"],"prefix":"10.1111","volume":"23","author":[{"given":"Lin","family":"Tao","sequence":"first","affiliation":[{"name":"Department of Orthopedics First Hospital of China Medical University  Shenyang 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