Generation and differentiation of IL-17-producing CD4+ T cells in malignant pleural effusion.
IL-17-producing CD4(+) T (Th17) cells have been found to be increased in some human cancers; however, the possible implication of Th17 cells in regulating antitumor responses in malignant pleural effusion (MPE) remains to be elucidated. In the current study, distribution and phenotypic features of Th17 cells in both MPE and peripheral blood from patients with lung cancer were determined by flow cytometry or double immunofluorescence staining. The impacts of cytokines on Th17 cell generation and differentiation were explored. The chemoattractant activity of chemokines CCL20 and CCL22 for Th17 cells in vitro was also observed. It was found that the increased Th17 cells could be found in MPE compared with blood. The in vitro experiments showed that IL-1β, IL-6, IL-23, or their various combinations could promote Th17 cell generation and differentiation from naive CD4(+) T cells. MPE was chemotactic for Th17 cells, and this activity was partly blocked by anti-CCL20 and/or CCL22 Abs. Our data also showed that the accumulation of Th17 cells in MPE predicted improved patient survival. It could be concluded that the overrepresentation of Th17 cells in MPE might be due to Th17 cell differentiation and expansion stimulated by pleural proinflammatory cytokines and to recruitment of Th17 cells from peripheral blood induced by pleural chemokines CCL20 and CCL22. Furthermore, the accumulation of Th17 cells in MPE predicted improved patient survival. These data provide the basis for developing immune-boosting strategies based on ridding the cancer patient of this cell population.
Department of Respiratory Diseases, Key Laboratory of Pulmonary Diseases of Health Ministry, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
Zhi-Jian
ZJ
Ye
Qiong
Q
Zhou
Yong-Yao
YY
Gu
Shou-Ming
SM
Qin
Wan-Li
WL
Ma
Jian-Bao
JB
Xin
Xiao-Nan
XN
Tao
Huan-Zhong
HZ
Shi
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002454:Cell Differentiation / Q000276:immunology*; D002469:Cell Separation; D018925:Chemokines / Q000032:analysis / Q000276:immunology / Q000378:metabolism; D002634:Chemotaxis, Leukocyte / Q000276:immunology*; D016207:Cytokines / Q000032:analysis / Q000276:immunology / Q000378:metabolism; D004797:Enzyme-Linked Immunosorbent Assay; D005434:Flow Cytometry; D005455:Fluorescent Antibody Technique; D006801:Humans; D053208:Kaplan-Meier Estimate; D008175:Lung Neoplasms / Q000276:immunology* / Q000401:mortality; D008875:Middle Aged; D016066:Pleural Effusion, Malignant / Q000166:cytology / Q000276:immunology*; D018417:Th1 Cells / Q000166:cytology / Q000276:immunology / Q000378:metabolism; D058504:Th17 Cells / Q000166:cytology* / Q000276:immunology / Q000378:metabolism
D018925:Chemokines; D016207:Cytokines