title: [Expressions of immunogenic molecules in low-dose radiotherapy-treated human renal clear cell carcinoma 786-0 cells].
abstract: OBJECTIVE
  To explore the effects of low-dose radiation on the expression of immunogenic membrane molecules calreticulin (CRT) and MHC-I/II on the surface of human renal clear cell carcinoma 786-0 cells.
  
  
  METHODS
  The inhibitory activity of low-dose radiation on cell line 786-0 was examined by CCK-8 assay. And the post-radiation membrane expressions of CRT, MHC-I and MHC-II were measured by flow cytometry while CRT was visualized by immunofluorescence photography.
  
  
  RESULTS
  The inhibition rates on the proliferative capacities of four 786-0 cell lines rose with the incremental radiation doses of 0, 6, 12 and 24 Gy. And the CRT expression levels of each experimental group was significantly higher than that of the control group (P < 0.001). Along with incremental doses of irradiation, the average calreticulin fluorescence intensities increased gradually initially and then there was a downward trend. The membrane expressions of MHC-I and MHC-II of each experimental group was significantly higher than those of the control group (P < 0.05). As the irradiation dose increased, the average MHC-I fluorescence intensities increased gradually in a dose-dependent manner.
  
  
  CONCLUSIONS
  The low-dose radiotherapy may up-regulate CRT and MHC class I/II related with the immunogenicity of tumor cells to induce immune response against tumors.
authors.affiliation: Department of Oncology, Affiliated Hospital, Hebei University, Baoding 071000, China.
authors.forename: Zhen-feng
authors.initials: ZF
authors.lastname: Ma
authors.forename: Jian-ru
authors.initials: JR
authors.lastname: Huang
authors.forename: Nai-peng
authors.initials: NP
authors.lastname: Cui
authors.forename: Ming
authors.initials: M
authors.lastname: Wen
authors.forename: Bao-ping
authors.initials: BP
authors.lastname: Chen
authors.forename: Zhong
authors.initials: Z
authors.lastname: Li
authors.forename: Chun-li
authors.initials: CL
authors.lastname: Zhao
mesh_terms: D037282:Calreticulin / Q000235:genetics* / Q000378:metabolism; D002292:Carcinoma, Renal Cell / Q000276:immunology*; D005805:Genes, MHC Class I / Q000235:genetics*; D005802:Genes, MHC Class II / Q000235:genetics*; D006801:Humans; D011879:Radiotherapy Dosage; D014407:Tumor Cells, Cultured / Q000276:immunology / Q000528:radiation effects
chemical_list: D037282:Calreticulin