{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,6]],"date-time":"2026-03-06T17:02:07Z","timestamp":1772816527922,"version":"3.50.1"},"reference-count":33,"publisher":"The Company of Biologists","issue":"4","license":[{"start":{"date-parts":[[1987,5,1]],"date-time":"1987-05-01T00:00:00Z","timestamp":546825600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/www.biologists.com\/user-licence-1-1\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[1987,5,1]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n               <jats:p>The effect of a synthetic peptide consisting of Arg-Gly-Asp-Ser (RGDS), the amino acid sequence representing the fibroblast attachment site in fibronectin (FN), was tested on migrating newt epidermal cells. In one approach, skin explants were placed on the bottom of plastic dishes coated with human FN, human fibrinogen (FGN), human serum spreading factor (SF), or bovine type I collagen. The explants were then incubated overnight in serum-free medium with or without RGDS. In these experiments exposure to 50 \u03bcgml\u22121 of RGDS reduced migration over FN, FGN and SF to 2\u20137% of control levels. Two peptides structurally dissimilar to RGDS (Vai-Gly-Ser-Glu and Thr-Pro-Arg-Lys), and two that are structurally similar (Lys-Gly-Asp-Ser and Arg-Gly-Glu-Ser), had no effect on explant migration even when used at concentrations higher than 50 \u03bcgml\u22121. Upon removal of the RGDS peptide, inhibited explants quickly recovered. In collagen-coated dishes 50 \u03bcgml\u22121 of RGDS was much less effective than in dishes coated with the other substrates. Raising the RGDS concentration in collagen-coated dishes tenfold did not greatly increase the RGDS effect. When added to the medium bathing wounded limbs, 50 \u03bcg ml\u22121 of RGDS only moderately inhibited wound closure.<\/jats:p>\n               <jats:p>This concentration of peptide, however, severely inhibited migration from skin explants in newt-plasma-coated-dishes and migration over pieces of newt-plasma-coated plastic placed under one edge of a skin wound. Increasing the RGDS concentration to 500 \u03bcg ml\u22121 resulted in almost total suppression of wound closure. Wounds exposed to this same concentration of Lys-Gly-Asp-Ser closed normally.<\/jats:p>\n               <jats:p>These results indicate that newt epidermal cells possess RGDS receptors and that these receptors are involved in epidermal wound closure in vivo and in migration from skin explants onto plastic coated with FN, FGN, SF and collagen.<\/jats:p>\n               <jats:p>The relative RGDS-insensitivity of wound closure in vivo and in migration from explants onto collagen may reflect in these instances the presence of a relatively high density of RGDS receptor binding sites on the substrate; the presence of RGDS receptor binding sites of relatively high affinity; or the participation of receptors other than those involved in migration over plastic coated with FN, FGN or SF.<\/jats:p>","DOI":"10.1242\/jcs.87.4.525","type":"journal-article","created":{"date-parts":[[2021,4,26]],"date-time":"2021-04-26T17:13:49Z","timestamp":1619457229000},"page":"525-534","source":"Crossref","is-referenced-by-count":25,"title":["Newt epidermal cell migration <i>in vitro<\/i> and <i>in vivo<\/i> appears to involve Arg-Gly-Asp-Ser receptors"],"prefix":"10.1242","volume":"87","author":[{"given":"Donald J.","family":"Donaldson","sequence":"first","affiliation":[{"name":"University of Tennessee, Memphis, The Health Science Center, Memphis, TN 38163 Department of Anatomy and Neurobiology , , USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"James T.","family":"Mahan","sequence":"additional","affiliation":[{"name":"University of Tennessee, Memphis, The Health Science Center, Memphis, TN 38163 Department of Anatomy and Neurobiology , , USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"suffix":"Jr","given":"Gerald N.","family":"Smith","sequence":"additional","affiliation":[{"name":"University of Tennessee, Memphis, The Health Science Center, Memphis, TN 38163 Department of Anatomy and Neurobiology , , USA"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"237","published-online":{"date-parts":[[1987,5,1]]},"reference":[{"key":"2023111623541259100_JOCES_87_4_525C1","doi-asserted-by":"publisher","first-page":"13 256","DOI":"10.1016\/S0021-9258(17)38862-2","article-title":"The interaction of fibronectin fragments with fibroblastic cells","volume":"260","author":"Akiyama","year":"1985","journal-title":"F. biol. 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