[Change in E-cadherin, alpha-, beta- and gamma-catenin expression after hyperthermia of a human colon carcinoma cell line in vitro].
OBJECTIVE
To investigate changes in E-cadherin, alpha-, beta-, and gamma-catenin expression after hyperthermia of a human colon cancer cell line in vitro.


METHODS
E-cadherin and alpha-, beta-, and gamma-catenin expression on a human colon carcinoma cell line HT29 at 7 successive times after hyperthermia at 43 degrees C for 60 min were investigated in vitro by RT-PCR and immunochemistry.


RESULTS
In vitro studies revealed that E-cadherin expression had increased significantly on HT29 cells at 24 hours after hyperthermia at 43 degrees C for 60 min. In a time-course analysis, the expression of E-cadherin had major increase at 24 to 72 hours after hyperthermia compared with an unheated control cell. gamma-catenin expression had increased significantly at 8 to 72 hours. After hyperthermia at 43 degrees C for 60 min, beta-catenin expression had decreased gradually at 4 hours to 72 hours. alpha-catenin expression kept unchanged after hyperthermia.


CONCLUSIONS
Hyperthermia at 43C for 60 min upregulated E-cadherin and gamma-catenin expressions but downregulated beta-catenin expression on colon carcinoma cells in vitro. alpha-catenin expression was not regulated by hyperthermia.
Liang
Han
H
Department of Gastrointestinal Oncological Surgery, Tianjin Cancer Hospital, Tianjin Medical University, Tianjin 300060, China.
Li
Jing-wu
JW
Shi
Yu-rong
YR
Niu
Rui-fang
RF
Wang
Pu
P
Hao
Xi-shan
XS
D000230:Adenocarcinoma / Q000378:metabolism / Q000473:pathology; D015820:Cadherins / Q000378:metabolism*; D015815:Cell Adhesion Molecules / Q000378:metabolism; D045744:Cell Line, Tumor; D003110:Colonic Neoplasms / Q000378:metabolism* / Q000473:pathology; D003598:Cytoskeletal Proteins / Q000378:metabolism*; D051180:Desmoplakins; D006358:Hot Temperature; D006801:Humans; D006979:Hyperthermia, Induced; D015534:Trans-Activators / Q000378:metabolism*; D051178:alpha Catenin; D051176:beta Catenin; D051185:gamma Catenin
C495273:CTNNA1 protein, human; C495270:CTNNB1 protein, human; D015820:Cadherins; D015815:Cell Adhesion Molecules; D003598:Cytoskeletal Proteins; D051180:Desmoplakins; C495292:JUP protein, human; D015534:Trans-Activators; D051178:alpha Catenin; D051176:beta Catenin; D051185:gamma Catenin