Back to Search
Start Over
Relationship between the GH-IGFs axis and the proliferation of bile duct cancer cell line QBC939 in vitro.
- Source :
-
Hepatobiliary & pancreatic diseases international : HBPD INT [Hepatobiliary Pancreat Dis Int] 2008 Feb; Vol. 7 (1), pp. 76-81. - Publication Year :
- 2008
-
Abstract
- Background: In recent years, recombined human growth hormone (rhGH) has been increasingly used in patients to help them recover from operation. But GH, as a mitogen, can promote cell renewal and increase malignant transformation. In the current study, we assessed the proliferation of a bile duct cancer cell line (QBC939) in vitro with GH and explored the possible relationship with the axis of GH-IGFs (insulin-like growth factors).<br />Methods: QBC939 cells in the exponential growth stage were harvested and divided into an experimental group (GH group) and a control group (NS group). The GH group was divided into four sub-groups according to the dose of GH and culture time (50 microg/L for 2 hours, 50 microg/L for 24 hours, 100 microg/L for 2 hours, 100 microg/L for 24 hours). The NS group was divided into two sub-groups (NS for 2 hours and NS for 24 hours). After 2 or 24 hours, IGF-1 and IGF-2 were detected using the enzyme-linked immunosorbent assay. The QBC939 cells cultured for 24 hours with two GH concentrations were made into single cell suspensions and samples underwent subsequent cell cycle evaluation. Messenger RNA of IGF-1 and IGF-2 receptor (IGF-1RmRNA and IGF-2RmRNA) were tested with the method of in situ hybridization.<br />Results: There was no statistically significant difference between the GH and NS groups after 2 hours of culture (P>0.05). But after 24 hours of culture, GH stimulated cell growth in vitro and also elevated the percentage in S phase and the proliferation index (P<0.05). IGF-1RmRNA and IGF-2RmRNA were expressed in QBC939 in contrast to the blank group. The expression of IGF-1RmRNA increased with the dose of GH, but IGF-2RmRNA did not.<br />Conclusion: GH can stimulate QBC939 cell growth and proliferation in vitro and the mechanism is most likely by the GH-IGF-1-IGF-1R axis.
- Subjects :
- Cell Division drug effects
Cell Division physiology
Cell Line, Tumor
Cytoplasm physiology
Humans
In Vitro Techniques
Insulin-Like Growth Factor I metabolism
Insulin-Like Growth Factor II metabolism
Mitogens pharmacology
RNA, Messenger metabolism
S Phase drug effects
S Phase physiology
Bile Duct Neoplasms pathology
Bile Ducts, Intrahepatic pathology
Cholangiocarcinoma pathology
Human Growth Hormone pharmacology
Insulin-Like Growth Factor I genetics
Insulin-Like Growth Factor II genetics
Subjects
Details
- Language :
- English
- ISSN :
- 1499-3872
- Volume :
- 7
- Issue :
- 1
- Database :
- MEDLINE
- Journal :
- Hepatobiliary & pancreatic diseases international : HBPD INT
- Publication Type :
- Academic Journal
- Accession number :
- 18234643