Details

Autor(en) / Beteiligte

• NAITO, Y
• SAITO, K
• SHIIBA, K
• OHUCHI, A
• SAIGENJI, K
• NAGURA, H
• OHTANI, H

Titel

CD8+ T cells infiltrated within cancer cell nests as a prognostic factor in human colorectal cancer

Ist Teil von

• Cancer research (Chicago, Ill.), 1998-08, Vol.58 (16), p.3491-3494

Ort / Verlag

Philadelphia, PA: American Association for Cancer Research

Erscheinungsjahr

1998

Quelle

MEDLINE

Beschreibungen/Notizen

• The pathophysiological significance of tumor infiltrating lymphocytes remains controversial. To clarify their role, we performed clinicopathological analysis of CD8+ T cells in 131 cases of human colorectal cancer. CD8+ T cells were classified into three groups by their localization: (a) those infiltrated within cancer cell nests; (b) those distributed in the cancer stroma; and (c) those present along the invasive margin (tumor-host interface). Of these, CD8+ T cells within cancer cell nests were most significantly associated with a better survival of patients by both mono- and multivariate analyses. The impact on survival was similar to that of Dukes' staging. Granzyme B+ cytoplasmic granules were detected in lymphocytes within cancer cell nests, confirming their activated, cytotoxic phenotype. CD8 and Ki-67 double immunohistochemistry confirmed higher proliferative activity of CD8+ T cells within cancer cell nests. Our data suggested that human colorectal cancer tissue was infiltrated by various numbers of T cells that had cytotoxic phenotype, contributing to a better survival of patients. This infiltration of colorectal cancer cell nests by CD8+ T cells could be a novel prognostic factor.