title: DNT cell inhibits the growth of pancreatic carcinoma via abnormal expressions of NKG2D and MICA in vivo.
abstract: This research aimed to investigate the effects of natural killer group 2 member D (NKG2D) and its ligands major histocompatibility complex class I chain-related molecules A(MICA) in DNT cell killing pancreatic carcinoma. Antibodies adsorption was used to separate DNT cell from human peripheral blood. Human pancreatic tumor models were established via implanting BXPC-3 cells into nude mice. Then randomly divided mice into blank group, gemcitabine group and DNT group. Mice weights and mice tumor volumes were measured every 5 days. 50 days later mice were euthanized at cervical dislocation method. Tumor weights were measured. Relative tumor volume and tumor inhibition rate were calculated. Western blot and qPCR were used to detect the expressions of NKG2D and MICA in the transplanted tumors of the three groups. DNT cell significantly increased over time. The blank group tumor volume and weight were significantly larger than the other groups (p < 0.001, p < 0.001), but there were no significantly difference between DNT group and gemcitabine group (p > 0.05). Gemcitabine and DNT cell tumor inhibition rate were 40.4% and 35.5%. Western blot and qPCR showed that MICA mRNA and protein levels in blank group were significantly higher than DNT group (p = 0.001, p = 0.003). NKG2D mRNA and protein levels in blank group were significantly lower than DNT cells group (p < 0.001, p = 0.001). In conclusion DNT cell can significantly inhibit the growth of pancreatic carcinoma in vivo, and the mechanism may be involved in abnormal expressions of MICA and NKG2D.
authors.affiliation: Department of General Surgery, Affiliated Provincial Hospital, Anhui Medical University, Hefei 230001, Anhui Province, PR China; Anhui Province Key Laboratory of Hepatopancreatobiliary Surgery, Hefei 230001, PR China.
authors.forename: Hong
authors.initials: H
authors.lastname: Xu
authors.affiliation: Department of General Surgery, Affiliated Provincial Hospital, Anhui Medical University, Hefei 230001, Anhui Province, PR China; Anhui Province Key Laboratory of Hepatopancreatobiliary Surgery, Hefei 230001, PR China.
authors.forename: Xing-Xing
authors.initials: XX
authors.lastname: Zhu
authors.affiliation: Department of General Surgery, Affiliated Provincial Hospital, Anhui Medical University, Hefei 230001, Anhui Province, PR China; Anhui Province Key Laboratory of Hepatopancreatobiliary Surgery, Hefei 230001, PR China. Electronic address: chen_jiong@126.com.
authors.forename: Jiong
authors.initials: J
authors.lastname: Chen
mesh_terms: D000818:Animals; D045744:Cell Line, Tumor; D049109:Cell Proliferation; D015972:Gene Expression Regulation, Neoplastic; D015395:Histocompatibility Antigens Class I / Q000276:immunology*; D006801:Humans; D016219:Immunotherapy, Adoptive / Q000379:methods; D051379:Mice; D008819:Mice, Nude; D055655:NK Cell Lectin-Like Receptor Subfamily K / Q000378:metabolism*; D010190:Pancreatic Neoplasms / Q000276:immunology* / Q000473:pathology / Q000628:therapy*; D013601:T-Lymphocytes / Q000276:immunology* / Q000637:transplantation*
chemical_list: D015395:Histocompatibility Antigens Class I; C527085:KLRK1 protein, human; C099187:MHC class I-related chain A; D055655:NK Cell Lectin-Like Receptor Subfamily K
keywords: DNT cell; MICA; NKG2D; Pancreatic carcinoma