{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,20]],"date-time":"2026-10-20T15:36:59Z","timestamp":1792510619605,"version":"4.5.0"},"reference-count":40,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2025,1,28]],"date-time":"2025-01-28T00:00:00Z","timestamp":1738022400000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2025,1,28]],"date-time":"2025-01-28T00:00:00Z","timestamp":1738022400000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"funder":[{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["82070800"],"award-info":[{"award-number":["82070800"]}],"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":["82203191"],"award-info":[{"award-number":["82203191"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100012166","name":"National Basic Research Program of China","doi-asserted-by":"publisher","award":["2022YFA1004801"],"award-info":[{"award-number":["2022YFA1004801"]}],"id":[{"id":"10.13039\/501100012166","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["J cachexia sarcopenia muscle"],"published-print":{"date-parts":[[2025,2]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:sec>\n                    <jats:title>Background<\/jats:title>\n                    <jats:p>Muscle atrophy is associated with Type 2 diabetes mellitus, which reduces the quality of life and lacks effective treatment strategies. Previously, it was determined that human umbilical cord mesenchymal stromal cell (hucMSC)\u2013derived exosomes (EXOs) ameliorate diabetes\u2010induced muscle atrophy. However, the systemic application of EXOs is less selective for diseased tissues, which reduces their efficacy and safety associated with their nonspecific biological distribution in\u00a0vivo. Therefore, improving exosomal targeting is imperative. In this study, a skeletal muscle\u2013specific aptamer (Apt) was used to explore the effects of Apt\u2010functionalized EXOs derived from hucMSCs in diabetes\u2010associated muscle atrophy and its specific mechanisms.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>Diabetic db\/db mice and C2C12 myotubes were used to explore the effects of MSC\u2010EXOs or Apt\u2010EXOs in alleviating muscle atrophy. Grip strength, muscle weight and muscle fibre cross\u2010sectional area (CSA) were used to evaluate skeletal muscle strength and muscle mass. Western blot analysis of muscle atrophy signalling, including MuRF1 and Atrogin 1 and the mitochondrial complex and Seahorse analysis were performed to investigate the underlying mechanisms of MSC\u2010EXOs or Apt\u2010EXOs on muscle atrophy.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      MSC\u2010EXOs increased grip strength (\n                      <jats:italic>p<\/jats:italic>\n                      \u2009=\u20090.0002) and muscle mass (\n                      <jats:italic>p<\/jats:italic>\n                      \u2009=\u20090.0044 for tibialis anterior (TA) muscle,\n                      <jats:italic>p<\/jats:italic>\n                      \u2009=\u20090.002 for soleus (SO) muscle) in db\/db mice. It also increased the CSA of muscle fibres (\n                      <jats:italic>p<\/jats:italic>\n                      \u2009=\u20090.0011 for all fibres,\n                      <jats:italic>p<\/jats:italic>\n                      \u2009=\u20090.0036 for slow muscle fibres and\n                      <jats:italic>p<\/jats:italic>\n                      \u2009=\u20090.0089 for fast muscle fibres) and the percentage of slow\u2010to\u2010fast muscle fibres (\n                      <jats:italic>p<\/jats:italic>\n                      \u2009=\u20090.0109). However, Atrogin 1 (\n                      <jats:italic>p<\/jats:italic>\n                      \u2009=\u20090.0455) and MuRF1 expression (\n                      <jats:italic>p<\/jats:italic>\n                      \u2009=\u20090.0168) was reduced. MSC\u2010EXOs activated SIRT1\/FoxO1\/3a signalling and enhanced mitochondrial function in db\/db mice and C2C12 myotubes. SIRT1 knockdown decreased the beneficial antiatrophic effects of MSC\u2010EXOs. Additionally, Apt conjugation increased the effect of MSC\u2010EXOs on muscle atrophy and myofiber\u2010type transition (\n                      <jats:italic>p<\/jats:italic>\n                      \u2009=\u20090.0133 for grip strength,\n                      <jats:italic>p<\/jats:italic>\n                      \u2009=\u20090.0124 for TA muscle weight,\n                      <jats:italic>p<\/jats:italic>\n                      \u2009=\u20090.0008 for SO muscle weight,\n                      <jats:italic>p<\/jats:italic>\n                      \u2009&lt;\u20090.0001 for CSA of all muscle fibres,\n                      <jats:italic>p<\/jats:italic>\n                      \u2009=\u20090.0198 for CSA of slow muscle fibres,\n                      <jats:italic>p<\/jats:italic>\n                      \u2009=\u20090.0213 for CSA of fast muscle fibres,\n                      <jats:italic>p<\/jats:italic>\n                      \u2009=\u20090.011 for percentage of slow\u2013fast muscle fibres,\n                      <jats:italic>p<\/jats:italic>\n                      \u2009=\u20090.0141 for Atrogin 1 expression and\n                      <jats:italic>p<\/jats:italic>\n                      \u2009=\u20090.005 for MuRF1 expression).\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>The results suggest that hucMSC\u2010derived exosomes ameliorate diabetes\u2010associated muscle atrophy by enhancing SIRT1\/FoxO1\/3a\u2010mediated mitochondrial function and that Apt conjugation strengthens the effects of MSC\u2010EXOs on muscle atrophy. These findings demonstrate the therapeutic potential of muscle\u2010targeted MSC\u2010EXOs for the treatment of muscle atrophy.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1002\/jcsm.13717","type":"journal-article","created":{"date-parts":[[2025,1,28]],"date-time":"2025-01-28T04:20:15Z","timestamp":1738038015000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":13,"title":["Aptamer\u2010Conjugated Exosomes Ameliorate Diabetes\u2010Induced Muscle Atrophy by Enhancing SIRT1\/FoxO1\/3a\u2010Mediated Mitochondrial Function"],"prefix":"10.1002","volume":"16","author":[{"given":"Jia","family":"Song","sequence":"first","affiliation":[{"name":"Department of Endocrinology and Metabolism Qilu Hospital of Shandong University  Jinan Shandong China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mengmeng","family":"Yang","sequence":"additional","affiliation":[{"name":"Department of Endocrinology and Metabolism Qilu Hospital of Shandong University  Jinan Shandong China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Longqing","family":"Xia","sequence":"additional","affiliation":[{"name":"Department of Endocrinology and Metabolism Qilu Hospital of Shandong University  Jinan Shandong China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Liming","family":"Wang","sequence":"additional","affiliation":[{"name":"Department of Endocrinology and Metabolism Qilu Hospital of Shandong University  Jinan Shandong China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kewei","family":"Wang","sequence":"additional","affiliation":[{"name":"Department of Endocrinology and Metabolism Qilu Hospital of Shandong University  Jinan Shandong China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yingyue","family":"Xiang","sequence":"additional","affiliation":[{"name":"Department of Endocrinology and Metabolism Qilu Hospital of Shandong University  Jinan Shandong China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jun","family":"Cheng","sequence":"additional","affiliation":[{"name":"Department of Clinical Laboratory, Shandong Engineering &amp; 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