Volume 67, Issue 3 pp. 333-338
Human Cancer

Mechanisms of immune suppression in patients with head and neck cancer: Influence on the immune infiltrate of the cancer

M. Rita I. Young

Corresponding Author

M. Rita I. Young

Research Service, Hines VA Hospital, Hines, IL 60141

Departments of Pathology and Otolaryngology, Loyola University Stritch School of Medicine, Maywood, IL 60153

Research Service (151-Z2), Hines V.A. Hospital, Hines, IL 60141. Fax: (708) 216-2319Search for more papers by this author
Mark A. Wright

Mark A. Wright

Research Service, Hines VA Hospital, Hines, IL 60141

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Yvonne Lozano

Yvonne Lozano

Research Service, Hines VA Hospital, Hines, IL 60141

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John P. Matthews

John P. Matthews

Departments of Pathology and Otolaryngology, Loyola University Stritch School of Medicine, Maywood, IL 60153

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Janet Benefield

Janet Benefield

Research Service, Hines VA Hospital, Hines, IL 60141

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M. Margaret Prechel

M. Margaret Prechel

Departments of Pathology and Otolaryngology, Loyola University Stritch School of Medicine, Maywood, IL 60153

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Abstract

Freshly excised human head and neck cancers (219 primary cancers; 64 metastatic lymph node cancers) were analyzed for the immune inhibitory mediators released from the cancer tissues and the immune infiltrate within the tumor. Significant levels of the immune inhibitory mediators transforming growth factor-β (TGF-β), prostaglandin E2 (PGE2) and interleukin-10 (IL-10) were released from these cancers. Also released was granulocyte-macrophage colony-stimulating factor (GM-CSF), whose secretion was associated with an intratumoral presence of CD34+ cells. We have previously shown that CD34+ cells within human head and neck cancers are immune inhibitory granulocyte-macrophage progenitor cells. The presence of TGF-β, PGE2 and IL-10 was associated with a reduced content of CD8+ T-cells within the cancers. The CD4+ cell content appeared to be less affected by these immune inhibitory mediators. Instead, parameters indicative of CD4+ cell function (p55 IL-2 receptor expression, release of IL-2 and IFN-γ) were diminished in cancers that released higher levels of TGF-β, IL-10 and GM-CSF and had a higher CD34+ cell content. Furthermore, metastatic cancers released higher levels of the soluble immune inhibitory mediators and lower levels of IFN-γ and IL-2 than did primary cancers, although CD34+ cells were similarly present in both primary and metastatic cancers. Our results show that human head and neck cancers have a multiplicity of non-mutually exclusive mechanisms of immune suppression that are most prominently associated with reduced CD8+ cell influx and reduced influx and altered function of intratumoral CD4+ cells. © 1996 Wiley-Liss, Inc.

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