[Construction of subtracted cDNA library by suppression subtractive hybridization for differentially expressed genes in eosinophils from asthma patients].
OBJECTIVE
To construct a subtracted cDNA library of differentially expressed genes in eosinophils from asthma patients.


METHODS
Suppression subtractive hybridization (SSH) was used to isolate the cDNA fragments of differentially expressed genes in the eosinophils of asthma patients before and after treatment. The cDNA fragments were directly inserted into T/A cloning vector to establish the subtractive library, followed by amplification of the library through E. coli transformation with calcium chloride and screening of blue and white clones of the transformants. One hundred positive bacterial clones were randomly picked and identified by colony PCR.


RESULTS
The amplified library contained more than 3,000 positive bacterial clones. Analysis of the randomly selected 100 white clones by PCR showed that 90% of the clones contained 100-500 bp inserts, which might be the cDNA fragments of differentially expressed genes in eosinophils of asthma patients before treatment.


CONCLUSIONS
A subtracted cDNA library of differentially expressed genes in the eosinophils of asthma patients before and after treatment is constructed successfully by SSH and T/A cloning techniques, which lays a solid foundation for screening and cloning new specific differentially.expressed genes in the eosinophils of asthma patients.
Xu
Jin-song
JS
Department of Respiratory Diseases, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China.
Cai
Shao-xi
SX
Zou
Fei
F
Tong
Wan-cheng
WC
Wan
Wei-ren
WR
Zhao
Hai-jin
HJ
D001249:Asthma / Q000097:blood / Q000235:genetics*; D018076:DNA, Complementary / Q000235:genetics*; D004804:Eosinophils / Q000378:metabolism*; D020869:Gene Expression Profiling; D005786:Gene Expression Regulation / Q000235:genetics; D015723:Gene Library; D006801:Humans; D008297:Male; D008875:Middle Aged; D009693:Nucleic Acid Hybridization
D018076:DNA, Complementary