PMID- 20567822 OWN - NLM STAT- MEDLINE DCOM- 20100816 LR - 20240426 IS - 1432-0851 (Electronic) IS - 0340-7004 (Print) IS - 0340-7004 (Linking) VI - 59 IP - 10 DP - 2010 Oct TI - CD8+ tumor-infiltrating lymphocytes predict favorable prognosis in malignant pleural mesothelioma after resection. PG - 1543-9 LID - 10.1007/s00262-010-0881-6 [doi] AB - Defects in human leukocyte antigen (HLA) class I expression may allow tumor cells to escape immune recognition. T cell infiltration is associated with a good prognosis in many cancers. However, the role of HLA class I expression and tumor-infiltrating lymphocytes (TILs) in malignant pleural mesothelioma (MPM) has not been fully analyzed. In the present study, we investigated the immune profiles and conducted outcome analyses of MPM patients. HLA class I expression and TILs (CD4(+), CD8(+), and NK cells) were detected by immunohistochemistry in a series of 44 MPM cases. To detect HLA class I expression, specimens were stained with the anti-pan HLA class I monoclonal antibody EMR8-5. The expression of HLA class I was positive in all patients. There was no case that showed negative HLA class I expression. The density of CD4(+) and CD8(+) TILs were strongly correlated (R = 0.76, p < 0.001). A high density of CD8(+) TILs was a significantly better prognostic factor for the survival of patients with extrapleural pneumonectomy (p < 0.05). Multivariate analysis revealed that a high density of CD8(+) TILs is an independent prognostic factor for patients who underwent extrapleural pneumonectomy. The presence of intratumoral CD8(+) T cells was correlated with an improved clinical outcome, raising the possibility that CD8(+) T cells might play a pivotal role in the antitumor immune response against MPMs. Thus, the stimulation of CD8(+) lymphocytes might be an efficacious immunotherapy for MPM patients. FAU - Yamada, Noriyuki AU - Yamada N AD - First Department of Medicine, Hokkaido University School of Medicine, North 15, West 7, Kita-ku, Sapporo, 060-8638, Japan. FAU - Oizumi, Satoshi AU - Oizumi S FAU - Kikuchi, Eiki AU - Kikuchi E FAU - Shinagawa, Naofumi AU - Shinagawa N FAU - Konishi-Sakakibara, Jun AU - Konishi-Sakakibara J FAU - Ishimine, Atsushi AU - Ishimine A FAU - Aoe, Keisuke AU - Aoe K FAU - Gemba, Kenichi AU - Gemba K FAU - Kishimoto, Takumi AU - Kishimoto T FAU - Torigoe, Toshihiko AU - Torigoe T FAU - Nishimura, Masaharu AU - Nishimura M LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20100622 PL - Germany TA - Cancer Immunol Immunother JT - Cancer immunology, immunotherapy : CII JID - 8605732 SB - IM MH - Adult MH - Aged MH - Aged, 80 and over MH - CD8-Positive T-Lymphocytes/*immunology MH - Female MH - Humans MH - Immunohistochemistry MH - Lymphocytes, Tumor-Infiltrating/*immunology MH - Male MH - Mesothelioma/*immunology/*physiopathology MH - Middle Aged MH - Neoplasm Staging MH - Pleural Neoplasms/*immunology/*physiopathology MH - Prognosis PMC - PMC11030611 EDAT- 2010/06/23 06:00 MHDA- 2010/08/17 06:00 PMCR- 2010/06/22 CRDT- 2010/06/23 06:00 PHST- 2010/03/21 00:00 [received] PHST- 2010/06/07 00:00 [accepted] PHST- 2010/06/23 06:00 [entrez] PHST- 2010/06/23 06:00 [pubmed] PHST- 2010/08/17 06:00 [medline] PHST- 2010/06/22 00:00 [pmc-release] AID - 881 [pii] AID - 10.1007/s00262-010-0881-6 [doi] PST - ppublish SO - Cancer Immunol Immunother. 2010 Oct;59(10):1543-9. doi: 10.1007/s00262-010-0881-6. Epub 2010 Jun 22.