{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,19]],"date-time":"2026-08-19T19:31:19Z","timestamp":1787167879207,"version":"build-2736575974"},"reference-count":25,"publisher":"Ovid Technologies (Wolters Kluwer Health)","issue":"10","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["JASN"],"published-print":{"date-parts":[[2017,10]]},"abstract":"<jats:p>\n                    Human glomerular diseases can be caused by several different diseases, many of which include mesangial expansion and\/or proliferation followed by glomerulosclerosis. However, molecular mechanisms underlying the pathologic mesangial changes remain poorly understood. Here, we investigated the role of the mammalian target of rapamycin complex 1 (mTORC1)\u2013S6 kinase pathway in mesangial expansion and\/or proliferation by ablating an upstream negative regulator, tuberous sclerosis complex 1 (TSC1), using tamoxifen-induced Foxd1-Cre mice [Foxd1ER(+) TSC1 mice]. Foxd1ER(+) TSC1 mice showed mesangial expansion with increased production of collagen IV, collagen I, and\n                    <jats:italic toggle=\"yes\">\u03b1<\/jats:italic>\n                    \u2013smooth muscle actin in glomeruli, but did not exhibit significant mesangial proliferation or albuminuria. Furthermore, rapamycin treatment of Foxd1ER(+) TSC1 mice suppressed mesangial expansion. Among biopsy specimens from patients with glomerular diseases, analysis of phosphorylated ribosomal protein S6 revealed mesangial cell mTORC1 activation in IgA nephropathy and in lupus mesangial proliferative nephritis but not in the early phase of diabetic nephropathy. In summary, mesangial cell mTORC1 activation can cause mesangial expansion and has clinical relevance for human glomerular diseases. This report also confirms that the tamoxifen-induced mesangium-specific Cre-loxP system is useful for studies designed to clarify the role of the mesangium in glomerular diseases in adults.\n                  <\/jats:p>","DOI":"10.1681\/asn.2016111196","type":"journal-article","created":{"date-parts":[[2017,7,12]],"date-time":"2017-07-12T20:25:25Z","timestamp":1499891125000},"page":"2879-2885","source":"Crossref","is-referenced-by-count":16,"title":["Mesangial Cell Mammalian Target of Rapamycin Complex 1 Activation Results in Mesangial Expansion"],"prefix":"10.1681","volume":"28","author":[{"given":"Kojiro","family":"Nagai","sequence":"first","affiliation":[{"name":"Department of Nephrology, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima, Japan; and"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tatsuya","family":"Tominaga","sequence":"additional","affiliation":[{"name":"Department of Nephrology, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima, Japan; and"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sayo","family":"Ueda","sequence":"additional","affiliation":[{"name":"Department of Nephrology, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima, Japan; and"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Eriko","family":"Shibata","sequence":"additional","affiliation":[{"name":"Department of Nephrology, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima, Japan; and"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Masanori","family":"Tamaki","sequence":"additional","affiliation":[{"name":"Department of Nephrology, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima, Japan; and"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Motokazu","family":"Matsuura","sequence":"additional","affiliation":[{"name":"Department of Nephrology, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima, Japan; and"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Seiji","family":"Kishi","sequence":"additional","affiliation":[{"name":"Department of Nephrology, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima, Japan; and"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Taichi","family":"Murakami","sequence":"additional","affiliation":[{"name":"Department of Nephrology, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima, Japan; and"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tatsumi","family":"Moriya","sequence":"additional","affiliation":[{"name":"Health Care Center, Kitasato University, Sagamihara, Kanagawa, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hideharu","family":"Abe","sequence":"additional","affiliation":[{"name":"Department of Nephrology, 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