[Relation between changes of dendritic cell function and down-regulation of beta-centractin in hepatocellular carcinoma].
OBJECTIVE
To investigate the relation between the changes of dendritic cell (DC) function and down-regulation of beta-centractin in hepatocellular carcinoma.


METHODS
DC derived from peripheral blood were cultured and then pulsed by lysates from hepatocarcinoma cells (HCC) with high, low, or none metastatic potential of the lines HCCLM6, MHCC97L, and Hep3B, and from normal human liver cell of the line Chang liver. DC not pulsed were used as control group. Three days later scanning electron microscopy and inverted microscopy were used to observe the morphology of the DC. Flow cytometry was used to observe the phenotype. The protein expression of beta-centractin was detected by Western blotting and immunocytochemistry.


RESULTS
Scanning electron microscopy and inverted microscopy showed no change in the morphology of the DC pulsed by different antigens. The expression levels of HLA-DR, CD80, CD83, and CD86 of the 4 pulsed groups were all significantly higher than that of the un-pulsed group (all P < 0.05). The expression of CD86 of the DC + LM6 group was significantly lower than those of the DC + Chang, DC + Hep3B, and DC + 97L groups (all P < 0.05). The mixed lymphocyte reaction (MLR) levels of the 4 pulsed groups were all significantly higher than that of the control group (all P < 0.05). The MLR level of the DC + LM6 group was significantly lower than those of the DC + Chang, DC + Hep3B, and DC + 97L groups (all P < 0.05). Western blotting showed that beta-centractin was not expressed in the control DC and was expressed in the 3 pulsed DC groups, and the beta-centractin expression levels of the DC + Chang, DC + Hep3B, and DC + 97L groups were all higher than that of the DC + LM6 group. The results of immunocytochemistry were similar to that of Western blotting.


CONCLUSIONS
The down-regulation of beta-centractin in the DC pulsed with high metastatic potential HVV cell lysates is associated DC dysfunction and may be one of the mechanisms of HCC immune escape.
Weng
Yong-qiang
YQ
Department of Surgery, Huadong Hospital, Fudan University, Shanghai 200040, China.
Qiu
Shuang-jian
SJ
Tang
Zhao-you
ZY
Gao
Qiang
Q
Wang
Kai-feng
KF
Song
Li-jie
LJ
Ye
Sheng-long
SL
Liu
Yin-kun
YK
Fan
Jia
J
D000199:Actins / Q000096:biosynthesis*; D015153:Blotting, Western; D006528:Carcinoma, Hepatocellular / Q000378:metabolism / Q000473:pathology; D002457:Cell Extracts / Q000494:pharmacology*; D002460:Cell Line; D045744:Cell Line, Tumor; D003713:Dendritic Cells / Q000166:cytology / Q000187:drug effects* / Q000378:metabolism; D006801:Humans; D007150:Immunohistochemistry; D008113:Liver Neoplasms / Q000378:metabolism / Q000473:pathology
D000199:Actins; D002457:Cell Extracts; C076834:centractin