[Construction of a reverse-subtracted cDNA library for differentially expressed genes in rat liver of prothrombotic state].
OBJECTIVE
To inquire into the mechanism of prothrombotic state (PTS) and the roles of liver therein by constructing a reverse-subtracted cDNA library for differentially expressed genes in rat liver of PTS.


METHODS
The reverse-subtracted cDNA library for differentially expressed genes in rat liver of PTS was constructed by suppression subtractive hybridization. The rat model of PTS was induced by a high-carbohydrate diet. Poly A+ mRNAs were isolated from PTS and control rats, and cDNAs were synthesized from the mRNAs. After digestion by means of Ras I, cDNAs 400-600 bp in size were obtained. For suppression subtractive hybridization, cDNAs from PTS rat were used as Driver and the cDNAs from control rat as Tester. The Tester was divided into two parts and ligated to adaptor 1 and adaptor 2R respectively. After two times of subtractive hybridization and two times of nested PCR, the products of the last PCR amplification were inserted into T/A plasmid vectors to transform the Escherichia coli JM109 cells. The transformed cells were incubated at 37 degrees C overnight on a LB agar plate containing ampicillin (50 micrograms/ml), IPTG and X-gal. The colonies were counted.


RESULTS
78% of the colonies were white and the reverse-subtracted cDNA library for differentially expressed genes in rat liver of prothrombotic state was successfully constructed.


CONCLUSIONS
Prothrombotic state caused by malfunction of homeostasis and fibrinolysis is an important risk factor of cardiovascular disease. Liver plays important roles in the development of PTS, for the majority of the factors in the coagulation as well as fibrinolytic cascades are generated by the liver and secreted into the bloodstream. The reverse-subtracted cDNA library for differentially expressed genes in rat liver of PTS, successfully constructed in the present study, provides an efficient way to further investigate the mechanism of PTS and the relevant liver functions.
Fang
Ding-zhi
DZ
Department of Biochemistry and Molecular Biology, West China School of Preclinical and Forensic Medicine, Sichuan University, Chengdu 610041, China.
Liu
Bing-wen
BW
Shen
Tao
T
Bai
Huai
H
Zhang
Chao-liang
CL
D000818:Animals; D018076:DNA, Complementary / Q000235:genetics*; D020869:Gene Expression Profiling; D015723:Gene Library; D008099:Liver / Q000378:metabolism*; D008297:Male; D016133:Polymerase Chain Reaction; D011897:Random Allocation; D051381:Rats; D017208:Rats, Wistar; D015183:Restriction Mapping / Q000379:methods; D017422:Sequence Analysis, DNA; D019851:Thrombophilia / Q000235:genetics*
D018076:DNA, Complementary