{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,21]],"date-time":"2026-02-21T13:32:50Z","timestamp":1771680770337,"version":"3.50.1"},"reference-count":0,"publisher":"Wiley","issue":"8","license":[{"start":{"date-parts":[[2001,8,1]],"date-time":"2001-08-01T00:00:00Z","timestamp":996624000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Journal of Periodontology"],"published-print":{"date-parts":[[2001,8]]},"abstract":"<jats:p><jats:bold>Background:<\/jats:bold> Expanded polytetrafluoroethylene (ePTFE) barrier membranes have been widely used for guided tissue regeneration (GTR) of the human periodontal ligament (PL). However, the precise cellular and molecular events involved in the re\u2010growth of the new tissue are still unclear.<\/jats:p><jats:p><jats:bold>Methods:<\/jats:bold> Retrieved membranes and the newly\u2010regenerated soft tissue (RT) underlying the membranes were used to examine the cells associated with GTR compared with normal human PL and gingival cells. Flow cytometry (FCM) was used, for the first time, to analyze the spindle\u2010shaped fibroblast\u2010like cells which were adherent to these membranes and the cells which grew out of the RT.<\/jats:p><jats:p><jats:bold>Results:<\/jats:bold> The results showed that the membrane\u2010associated (M) cells had the lowest rate of proliferation and appeared to be larger and more granular than the other types of cell. Moreover, both the M\u2010 and RT\u2010derived cells were found to express higher levels of the extracellular matrix (ECM) proteins collagen type I, fibronectin, tenascin, and decorin. In addition, evidence based on FCM profiles identified distinct sub\u2010populations of GTR cells in which fibronectin expression was markedly up\u2010regulated compared with normal PL cells and which also differed in size and granularity.<\/jats:p><jats:p><jats:bold>Conclusions:<\/jats:bold> The results of this study show that cells associated with GTR barrier membranes and with the underlying tissue appear to have distinct phenotypic and functional activities consistent with the production of new periodontal connective tissue and periodontal regeneration. <jats:italic>J Periodontol 2001;72:1016\u20101024.<\/jats:italic><\/jats:p>","DOI":"10.1902\/jop.2001.72.8.1016","type":"journal-article","created":{"date-parts":[[2005,2,2]],"date-time":"2005-02-02T07:00:21Z","timestamp":1107327621000},"page":"1016-1024","source":"Crossref","is-referenced-by-count":8,"title":["Flow Cytometry Analysis of Guided Tissue Regeneration\u2010Associated Human Periodontal Cells"],"prefix":"10.1002","volume":"72","author":[{"given":"L.","family":"Kuru","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"M.H.","family":"Parkar","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"G.S.","family":"Griffiths","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"I.","family":"Olsen","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2001,8]]},"container-title":["Journal of Periodontology"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/aap.onlinelibrary.wiley.com\/doi\/pdf\/10.1902\/jop.2001.72.8.1016","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,19]],"date-time":"2025-10-19T13:38:40Z","timestamp":1760881120000},"score":1,"resource":{"primary":{"URL":"https:\/\/aap.onlinelibrary.wiley.com\/doi\/10.1902\/jop.2001.72.8.1016"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2001,8]]},"references-count":0,"journal-issue":{"issue":"8","published-print":{"date-parts":[[2001,8]]}},"alternative-id":["10.1902\/jop.2001.72.8.1016"],"URL":"https:\/\/doi.org\/10.1902\/jop.2001.72.8.1016","archive":["Portico"],"relation":{},"ISSN":["0022-3492","1943-3670"],"issn-type":[{"value":"0022-3492","type":"print"},{"value":"1943-3670","type":"electronic"}],"subject":[],"published":{"date-parts":[[2001,8]]}}}