[Effects of snake venom cystatin gene on gene expression profiles in mouse melanoma cell line B16F1].
OBJECTIVE
Previously, we have demonstrated that snake venom cystatin (sv-cystatin) plays an important role in tumor invasion and metastasis. This study was to investigate the effects of sv-cystatin on the gene expression profile of mouse melanoma B16F1 cells.


METHODS
pcDNA3.1/sv-cystatin plasmid was constructed and transfected into B16F1 using lipofectamine. Differentially expressed genes between B16F1 transfected with pcDNA3.1/sv-cystatin and pcDNA3.1 were analysed by high throughput microarray technique. Five up-regulated genes and five down-regulated genes were confirmed by semiquantitative reverse transcription-polymerase chain reaction (RT-PCR).


RESULTS
Out of 1218 transcript species, 45 showed altered expressions: 21 were up-regulated and 24 were down-regulated. These altered genes are involved in cell adhesion and migration, cell immunomodulation, proliferation, differentiation, apoptosis, as well as gene transcription and intra-cellular signal transduction. RT-PCR results of 10 alerted genes were in accordance with the microarray data.


CONCLUSIONS
Sv-cystatin not only inhibits the extracellular matrix, but may also possess other diverse biological functions, including cell immunomodulation, proliferation and differentiation, apoptosis, gene transcription and intra-cellular signal transduction.
Xie
Qun
Q
Research Center for Molecular Medicine, The Key Laboratory of Infection and Oncology of Universities in Fujian Province, Fujian Medical University, Fuzhou, Fujian, 350004, P R China.
Wan
Rong
R
Lin
Xu
X
Lin
Jian-Yin
JY
D000818:Animals; D017209:Apoptosis; D002448:Cell Adhesion; D015891:Cystatins / Q000235:genetics*; D020869:Gene Expression Profiling; D008546:Melanoma, Experimental / Q000235:genetics / Q000473:pathology*; D051379:Mice; D009361:Neoplasm Invasiveness; D020133:Reverse Transcriptase Polymerase Chain Reaction; D012910:Snake Venoms / Q000235:genetics*; D014162:Transfection; D016212:Transforming Growth Factor beta / Q000502:physiology
D015891:Cystatins; D012910:Snake Venoms; D016212:Transforming Growth Factor beta