title: Interleukin-10 expression significantly correlates with minor CD8+ T-cell infiltration and high microvessel density in patients with gastric cancer.
abstract: We aimed to investigate the relationships between interleukin-10 (IL-10) expression and both the clinicopathological findings and prognoses in patients with gastric cancer and to compare IL-10 expression with microvessel (MV) density and CD8+ T lymphocyte infiltration to evaluate its effects on angiogenesis and immune responses in gastric cancer. IL-10 expression was determined in gastric cancer patients by reverse transcription-polymerase chain reaction (RT-PCR) or immunohistochemical procedures. Two of 7 normal gastric tissues showed IL-10 mRNA expression, while its expressions were confirmed in all advanced gastric carcinoma tissues examined (n=11) by RT-PCR. Immunohistochemical staining demonstrated that IL-10 expression was detected in 52 (47.7%) of 109 cases. There was a close correlation between IL-10 expression and MV density. IL-10 expression inversely correlated with CD8+ T-lymphocyte infiltration. The prognoses of patients whose tumors expressed IL-10 were significantly worse than those of patients whose tumors did not express IL-10. Multivariate analysis indicated IL-10 expression was an independent prognostic factor. IL-10 might be associated with tumor progression by stimulating angiogenesis and suppressing immune responses in gastric cancer.
authors.affiliation: Department of Surgery, Division of Surgical Oncology, Tottori University School of Medicine, Yonago 683-8504, Japan.
authors.forename: Teruhisa
authors.initials: T
authors.lastname: Sakamoto
authors.forename: Hiroaki
authors.initials: H
authors.lastname: Saito
authors.forename: Shigeru
authors.initials: S
authors.lastname: Tatebe
authors.forename: Shunichi
authors.initials: S
authors.lastname: Tsujitani
authors.forename: Mitsuhiko
authors.initials: M
authors.lastname: Ozaki
authors.forename: Hisao
authors.initials: H
authors.lastname: Ito
authors.forename: Masahide
authors.initials: M
authors.lastname: Ikeguchi
mesh_terms: D000230:Adenocarcinoma / Q000098:blood supply* / Q000276:immunology*; D000368:Aged; D018414:CD8-Positive T-Lymphocytes / Q000276:immunology*; D005260:Female; D005743:Gastrectomy; D006801:Humans; D007150:Immunohistochemistry; D016753:Interleukin-10 / Q000096:biosynthesis*; D008297:Male; D008833:Microcirculation; D008875:Middle Aged; D009389:Neovascularization, Pathologic; D011237:Predictive Value of Tests; D011379:Prognosis; D020133:Reverse Transcriptase Polymerase Chain Reaction; D013270:Stomach / Q000098:blood supply / Q000276:immunology; D013274:Stomach Neoplasms / Q000098:blood supply* / Q000276:immunology*; D016019:Survival Analysis; D042461:Vascular Endothelial Growth Factor A / Q000502:physiology
chemical_list: D042461:Vascular Endothelial Growth Factor A; D016753:Interleukin-10