{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,3]],"date-time":"2026-06-03T00:43:14Z","timestamp":1780447394805,"version":"3.54.1"},"reference-count":43,"publisher":"American Physiological Society","issue":"2","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["American Journal of Physiology-Renal Physiology"],"published-print":{"date-parts":[[2010,2]]},"abstract":"<jats:p>Insulin-like growth factor binding protein-5 (IGFBP-5) mediates mesangial cell migration through activation of cdc42, and laminin421 binding to \u03b1<jats:sub>6<\/jats:sub>\u03b2<jats:sub>1<\/jats:sub>-integrin (Berfield AK, Hansen KM, Abrass CK. Am J Physiol Cell Physiol 291: C589\u2013C599, 2006). Because glomerular expression of laminin \u03b2<jats:sub>2<\/jats:sub>is reduced in diabetic rats (Abrass CK, Spicer D, Berfield AK, St. John PL, Abrahamson DR. Am J Pathol 151: 1131\u20131140, 1997), we directly examined the effect of hyperglycemia on mesangial cell migration and laminin \u03b22 expression. Migration mediated by IGFBP-5 is impaired in the presence of 25 mM glucose. This reduction in migration was found to result from a loss in mesangial cell synthesis of laminin421, and IGFBP-5-induced migration could be restored by replacing laminin421. Additional studies showed that there was selective reduction in mRNA translation of laminin \u03b22 in the presence of high glucose. Preserved synthesis of laminin \u03b21 indicates that not all proteins are reduced by high glucose and confirms prior data showing that laminin411 cannot substitute for laminin421 in IGFBP-5-mediated migration. Given the importance of mesangial migration in the reparative response to diabetes-associated mesangiolysis, these findings provide new insights into abnormalities associated with diabetic nephropathy and the potential importance of differential control of protein translation in determination of alterations of protein expression.<\/jats:p>","DOI":"10.1152\/ajprenal.00483.2009","type":"journal-article","created":{"date-parts":[[2009,10,29]],"date-time":"2009-10-29T02:04:29Z","timestamp":1256781869000},"page":"F314-F322","source":"Crossref","is-referenced-by-count":11,"title":["Reductions in laminin \u03b22 mRNA translation are responsible for impaired IGFBP-5-mediated mesangial cell migration in the presence of high glucose"],"prefix":"10.1152","volume":"298","author":[{"given":"Valerie","family":"Schaeffer","sequence":"first","affiliation":[{"name":"Primary and Specialty Care Medicine, Department of Veterans Affairs Puget Sound Health Care System,"},{"name":"Division of Gerontology and 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