{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,2]],"date-time":"2026-10-02T19:12:19Z","timestamp":1790968339879,"version":"4.1.0"},"reference-count":42,"publisher":"Oxford University Press (OUP)","issue":"10","license":[{"start":{"date-parts":[[2001,11,1]],"date-time":"2001-11-01T00:00:00Z","timestamp":1004572800000},"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":[[2001,11,15]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>In vivo priming of CD8+ T lymphocytes against exogenously processed model Ags requires CD4+ T cell help, specifically interactions between CD40 ligand (CD40L) expressed by activated CD4+ T cells and CD40, which is present on professional APC such as dendritic cells (DCs). To address this issue in the context of bacterial infection, we examined CD40L-CD40 interactions in CD8+ T cell priming against an exogenously processed, nonsecreted bacterial Ag. CD40L interactions were blocked by in vivo treatment with anti-CD40L mAb MR-1, which inhibited germinal center formation and CD8+ T cell cross-priming against an exogenous model Ag, OVA. In contrast, MR-1 treatment did not interfere with CD8+ T cell priming against a nonsecreted or secreted recombinant Ag expressed by Listeria monocytogenes. Memory and secondary responses of CD8+ T cells against nonsecreted and secreted bacterial Ags were also largely unimpaired by transient MR-1 treatment. When MR-1-treated mice were concurrently immunized with L. monocytogenes and OVA-loaded splenocytes, cross-priming of OVA-specific naive CD8+ T cells occurred. No significant decline in cross-priming against OVA was measured when either TNF or IFN-\u03b3 was neutralized in L. monocytogenes-infected animals, demonstrating that multiple signals exist to overcome CD40L blockade of CD8+ T cell cross-priming during bacterial infection. These data support a model in which DCs can be stimulated in vivo through signals other than CD40, becoming APC that can effectively stimulate CD8+ T cell responses against exogenous Ags during infection.<\/jats:p>","DOI":"10.4049\/jimmunol.167.10.5603","type":"journal-article","created":{"date-parts":[[2014,4,20]],"date-time":"2014-04-20T22:55:17Z","timestamp":1398034517000},"page":"5603-5609","source":"Crossref","is-referenced-by-count":36,"title":["<i>Listeria monocytogenes<\/i>\n                    Infection Overcomes the Requirement for CD40 Ligand in Exogenous Antigen Presentation to CD8+ T Cells"],"prefix":"10.1093","volume":"167","author":[{"given":"Sara E","family":"Hamilton","sequence":"first","affiliation":[{"name":"Interdisciplinary Program in Immunology, University of Iowa , Iowa City, IA 52242"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Amy R","family":"Tvinnereim","sequence":"additional","affiliation":[{"name":"Department of Microbiology, University of Iowa , Iowa City, IA 52242"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"John T","family":"Harty","sequence":"additional","affiliation":[{"name":"Interdisciplinary Program in Immunology, University of Iowa , Iowa City, IA 52242"},{"name":"Department of Microbiology, University of Iowa , Iowa City, IA 52242"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"286","published-online":{"date-parts":[[2001,11,15]]},"reference":[{"key":"2026020208080662400_R1","first-page":"480","volume-title":"Nature","year":"1998"},{"key":"2026020208080662400_R2","first-page":"478","volume-title":"Nature","year":"1998"},{"key":"2026020208080662400_R3","first-page":"474","volume-title":"Nature","year":"1998"},{"key":"2026020208080662400_R4","first-page":"1283","volume-title":"J. 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