{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,6]],"date-time":"2026-10-06T21:24:32Z","timestamp":1791321872450,"version":"4.3.1"},"reference-count":35,"publisher":"Wiley","issue":"6","license":[{"start":{"date-parts":[[2012,5,24]],"date-time":"2012-05-24T00:00:00Z","timestamp":1337817600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Experimental Dermatology"],"published-print":{"date-parts":[[2012,6]]},"abstract":"<jats:p><jats:bold>Abstract:\u2002<\/jats:bold>Extracorporeal photopheresis (ECP) is an established therapy for transplant rejection, graft\u2010versus\u2010host disease (GvHD) after allogeneic stem cell transplantation, cutaneous T\u2010cell lymphoma and systemic autoimmune disorders such as systemic sclerosis. Knowledge regarding the<jats:italic>in vivo<\/jats:italic>behaviour of the cells after reinfusion is very limited. The aim of this prospective study was to investigate the path of 8\u2010MOP\u2010\/UVA\u2010exposed radiolabelled cells after ECP treatment and reinfusion. In this prospective single\u2010centre study, peripheral blood mononuclear cells (PBMC) and neutrophils of 10 patients undergoing ECP as part of their regular treatment were labelled separately with<jats:sup>111<\/jats:sup>In\u2010oxine after exposure to 8\u2010MOP\/UVA and prior to reinfusion. The fate of the labelled leucocytes was monitored at 10\u2003min, 3.5 and 24\u2003h following reinfusion with whole\u2010body scintigraphy. Comparison of distribution patterns showed that PBMC and neutrophils have different kinetic patterns after intravenous reinjection. The most prominent difference was immediate retention of PBMC but not of neutrophils in the lungs corresponding to a signal three times more intense. After 24\u2003h, more than 80% of both cell populations could be detected in liver and spleen. By means of a novel tool allowing for tracking of 8\u2010MOP\u2010\/UVA\u2010exposed leucocytes in ECP, we could show that organ\u2010specific homing of leucocytes after ECP can be visualized<jats:italic>in vivo<\/jats:italic>and that migration patterns differ between PBMC and neutrophils. Based on our results, further studies should (i) extend the morphometric studies described here to specific ECP\u2010responsive conditions and (ii) functionally address the interaction of ECP\u2010modified PBMC with pulmonary tissue in experimental models.<\/jats:p>","DOI":"10.1111\/j.1600-0625.2012.01491.x","type":"journal-article","created":{"date-parts":[[2012,3,27]],"date-time":"2012-03-27T13:17:26Z","timestamp":1332854246000},"page":"443-447","source":"Crossref","is-referenced-by-count":10,"title":["Leucocyte scintigraphy with<sup>111<\/sup>In\u2010oxine for assessment of cell trafficking after extracorporeal 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