{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,26]],"date-time":"2026-02-26T15:12:40Z","timestamp":1772118760767,"version":"3.50.1"},"reference-count":40,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2023,12,20]],"date-time":"2023-12-20T00:00:00Z","timestamp":1703030400000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc\/4.0\/"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["J cachexia sarcopenia muscle"],"published-print":{"date-parts":[[2024,2]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:sec>\n                    <jats:title>Background<\/jats:title>\n                    <jats:p>Decreased insulin availability and high blood glucose levels, the hallmark features of poorly controlled diabetes, drive disease progression and are associated with decreased skeletal muscle mass. We have shown that mice with \u03b2\u2010cell dysfunction and normal insulin sensitivity have decreased skeletal muscle mass. This project asks how insulin deficiency impacts on the structure and function of the remaining skeletal muscle in these animals.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>\n                      Skeletal muscle function was determined by measuring exercise capacity and specific muscle strength prior to and after insulin supplementation for 28\u00a0days in 12\u2010week\u2010old mice with conditional \u03b2\u2010cell deletion of the ATP binding cassette transporters ABCA1 and ABCG1 (\u03b2\u2010DKO mice).\n                      <jats:italic>Abca1<\/jats:italic>\n                      and\n                      <jats:italic>Abcg1<\/jats:italic>\n                      floxed (fl\/fl) mice were used as controls. RNAseq was used to quantify changes in transcripts in soleus and extensor digitorum longus muscles. Skeletal muscle and mitochondrial morphology were assessed by transmission electron microscopy. Myofibrillar Ca\n                      <jats:sup>2+<\/jats:sup>\n                      sensitivity and maximum isometric single muscle fibre force were assessed using\n                      <jats:italic>MyoRobot<\/jats:italic>\n                      biomechatronics technology.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      RNA transcripts were significantly altered in \u03b2\u2010DKO mice compared with fl\/fl controls (32 in extensor digitorum longus and 412 in soleus). Exercise capacity and muscle strength were significantly decreased in \u03b2\u2010DKO mice compared with fl\/fl controls (\n                      <jats:italic>P\u00a0=<\/jats:italic>\n                      \u00a00.012), and a loss of structural integrity was also observed in skeletal muscle from the \u03b2\u2010DKO mice. Supplementation of \u03b2\u2010DKO mice with insulin restored muscle integrity, strength and expression of 13 and 16 of the dysregulated transcripts in and extensor digitorum longus and soleus muscles, respectively.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>Insulin insufficiency due to \u03b2\u2010cell dysfunction perturbs the structure and function of skeletal muscle. These adverse effects are rectified by insulin supplementation.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1002\/jcsm.13380","type":"journal-article","created":{"date-parts":[[2023,12,21]],"date-time":"2023-12-21T01:04:06Z","timestamp":1703120646000},"page":"112-123","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":7,"title":["Effect of insulin insufficiency on ultrastructure and function in skeletal muscle"],"prefix":"10.1002","volume":"15","author":[{"given":"Chantal","family":"Kopecky","sequence":"first","affiliation":[{"name":"School of Biomedical Sciences, Faculty of Medicine &amp; Health UNSW Sydney  Sydney Australia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Michael","family":"Haug","sequence":"additional","affiliation":[{"name":"Department of Chemical and Biological Engineering, Institute of Medical Biotechnology Friedrich\u2010Alexander University Erlangen\u2010N\u00fcrnberg  Erlangen 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