Abstract：
:CXCL16 is a new member of the chemokine superfamily, which exists in a transmembrane as well as a soluble form. Its receptor CXCR6 is detected on CD4(+) T cells, CD8(+) T cells, and natural killer T cells. Here, we report a significant correlation of CXCL16 expression by tumor cells with the infiltration of T cells and prognosis in colorectal cancer (CRC). We first found that CXCL16 expression was consistently up-regulated more in tumor tissues than in normal mucosa derived from the same CRC patients. Four human CRC cell lines also expressed CXCL16 mRNA and secreted soluble CXCL16. We next examined the expression of CXCL16 and infiltration of lymphocytes in CRC specimens (n = 58) by immunohistochemistry. CRC patients with high levels of CXCL16 expression (n = 43) had higher levels of CD4(+) and CD8(+) tumor-infiltrating lymphocytes (TIL; P < 0.01) than those with low levels of CXCL16 expression (n = 15). Furthermore, the high CXCL16 expression group showed significantly better prognosis than the low CXCL16 expression group (P < 0.05). Collectively, our data suggest that the expression of CXCL16 by tumor cells enhances the recruitment of TILs, thereby bringing about a better prognosis in CRC. Thus, CXCL16 is a new prognostic biomarker and may be useful for the development of a more effective therapeutic strategy for CRC.
journal_name
Cancer Resjournal_title
Cancer researchauthors
Hojo S,Koizumi K,Tsuneyama K,Arita Y,Cui Z,Shinohara K,Minami T,Hashimoto I,Nakayama T,Sakurai H,Takano Y,Yoshie O,Tsukada K,Saiki Idoi
10.1158/0008-5472.CAN-06-3424subject
Has Abstractpub_date
2007-05-15 00:00:00pages
4725-31issue
10eissn
0008-5472issn
1538-7445pii
67/10/4725journal_volume
67pub_type
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