{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,7]],"date-time":"2026-10-07T00:07:28Z","timestamp":1791331648044,"version":"4.3.1"},"reference-count":62,"publisher":"Oxford University Press (OUP)","issue":"7","license":[{"start":{"date-parts":[[2007,4,1]],"date-time":"2007-04-01T00:00:00Z","timestamp":1175385600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/academic.oup.com\/pages\/standard-publication-reuse-rights"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2007,4,1]]},"abstract":"<jats:title>Abstract<\/jats:title>\n               <jats:p>Regulatory T cells (TR) play a critical role in the inhibition of self-reactive immune responses and as such have been implicated in the suppression of tumor-reactive effector T cells. In this study, we demonstrate that follicular lymphoma (FL)-infiltrating CD8+ and CD4+ T cells are hyporesponsive to CD3\/CD28 costimulation. We further identify a population of FL-infiltrating CD4+CD25+GITR+ TR that are significantly overrepresented within FL nodes (FLN) compared with that seen in normal (nonmalignant, nonlymphoid hyperplastic) or reactive (nonmalignant, lymphoid hyperplastic) nodes. These TR actively suppress both the proliferation of autologous nodal CD8+CD25\u2212 and CD4+CD25\u2212 T cells, as well as cytokine production (IFN-\u03b3, TNF-\u03b1 and IL-2), after CD3\/CD28 costimulation. Removal of these cells in vitro by CD25+ magnetic bead depletion restores both the proliferation and cytokine production of the remaining T cells, demonstrating that FLN T cell hyporesponsiveness is reversible. In addition to suppressing autologous nodal T cells, these TR are also capable of suppressing the proliferation of allogeneic CD8+CD25\u2212 and CD4+CD25\u2212 T cells from normal lymph nodes as well as normal donor PBL, regardless of very robust stimulation of the target cells with plate-bound anti-CD3 and anti-CD28 Abs. The allogeneic suppression is not reciprocal, as equivalent numbers of CD25+FOXP3+ cells derived from either normal lymph nodes or PBL are not capable of suppressing allogeneic CD8+CD25\u2212 and CD4+CD25\u2212 T cells, suggesting that FLN TR are more suppressive than those derived from nonmalignant sources. Lastly, we demonstrate that inhibition of TGF-\u03b2 signaling partially restores FLN T cell proliferation suggesting a mechanistic role for TGF-\u03b2 in FLN TR-mediated suppression.<\/jats:p>","DOI":"10.4049\/jimmunol.178.7.4051","type":"journal-article","created":{"date-parts":[[2014,4,18]],"date-time":"2014-04-18T22:53:35Z","timestamp":1397861615000},"page":"4051-4061","source":"Crossref","is-referenced-by-count":86,"title":["Follicular Lymphoma Intratumoral CD4+CD25+GITR+ Regulatory T Cells Potently Suppress CD3\/CD28-Costimulated Autologous and Allogeneic CD8+CD25\u2212 and CD4+CD25\u2212 T Cells"],"prefix":"10.1093","volume":"178","author":[{"given":"Shannon P","family":"Hilchey","sequence":"first","affiliation":[{"name":"James P. Wilmot Cancer Center, University of Rochester Medical Center , Rochester, NY 14642"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Asit","family":"De","sequence":"additional","affiliation":[{"name":"James P. Wilmot Cancer Center, University of Rochester Medical Center , Rochester, NY 14642"},{"name":"Department of Surgery, University of Rochester Medical Center , Rochester, NY 14642"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lisa M","family":"Rimsza","sequence":"additional","affiliation":[{"name":"Department of Pathology, University of Arizona , Tucson, AZ 85724"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Richard B","family":"Bankert","sequence":"additional","affiliation":[{"name":"Department of Microbiology and Immunology, State University of New York , Buffalo, NY 14214"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Steven H","family":"Bernstein","sequence":"additional","affiliation":[{"name":"James P. 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