Toshifumi Yamaoka, Manabu Fujimoto, Fumihide Ogawa, Ayumi Yoshizaki, Sang Jae Bae, Eiji Muroi, Kazuhiro Komura, Yohei Iwata, Yuichiro Akiyama, Koichi Yanaba, Kazuhiro Shimizu, Shinichi Sato
JOURNAL OF DERMATOLOGICAL SCIENCE 64(2) 99-107 2011年11月 査読有り
Background: Malignant melanoma is often accompanied by a host response of inflammatory cell infiltration that is highly regulated by multiple adhesion molecules.
Objective: To evaluate the role of adhesion molecules, including P-selectin glycoprotein ligand-1 (PSGL-1), P-selectin, and E-selectin.
Methods: Subcutaneous primary growth and metastasis to the lung of 816 melanoma cells were examined in mice lacking PSGL-1. P-selectin. or E-selectin.
Results: Primary subcutaneous growth of B16 melanoma was augmented by loss of PSGL-1, P-selectin, or E-selectin, while pulmonary metastasis was reduced by the loss of E-selectin. The enhancement of subcutaneous tumor growth was associated with a reduced accumulation of natural killer cells, CD4(+) T cells and CD8(+) T cells, while the attenuation of pulmonary metastasis was related to the numbers of CD8(+) T cells. The expressions of transforming growth factor (TGF)-beta and interleukin (IL)-6 were correlated with primary subcutaneous growth; TGF-beta, IL-6, and interferon-gamma were related to number of metastatic lung nodules. Cytotoxicity against melanoma cells in splenocytes and in tumor-draining lymph node cells were not defective by the absence of adhesion molecules, suggesting that the enhancement of tumor growth and metastasis caused by the loss of selectins results from an impaired migration of effector cells into the tissue.
Conclusions: The results indicate the complexity of anti-tumor responses mediated by adhesion molecules in primary subcutaneous tumors and pulmonary metastasis of murine experimental melanoma. (C) 2011 Japanese Society for Investigative Dermatology. Published by Elsevier Ireland Ltd. All rights reserved.