A Study of Point Mutations of Human Insulin-like Growth Factor
- Author:
In Myung YANG
;
Jeong Taek WOO
;
Sung Woon KIM
;
Jin Woo KIM
;
Young Seol KIM
;
Young Kil CHOI
;
Hyun Ha CHANG
;
In Kyung JUNG
;
Tae Kwan PARK
- Publication Type:Original Article
- Keywords:
IGF-I;
Promoter;
Point mutation
- MeSH:
Binding Sites;
Biomarkers;
Child;
Humans;
In Vitro Techniques;
Insulin-Like Growth Factor Binding Protein 3;
Insulin-Like Growth Factor I;
Jupiter;
Korea;
Methods;
Point Mutation;
Polymorphism, Single-Stranded Conformational
- From:Journal of Korean Society of Endocrinology
1996;11(4):500-509
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
Background: FSS is a normal variants in Korea, but some of them had defect of noctumal GH pulse i.e. neurosecretory dysfunction. Although Korean children had strikingly got higher final height in the last decade. We are interested in what kinds of differences were existed in FSS group. Previous study showed theres no difference of GH related biochemical markers between normal and FSS group, like IGF-I, IGFBP-3 etc. We analyzed molecular difference in FSS group. Methods: We screened 23 FSS patients and 16 normal controls to IGF-I gene prornoter region with PCR-SSCP (single strand conformation polymorphisrn) method and sequenced 1 FSS patients who had abnormal SSCP band. Results: We found 1 out of 23 patients with abnormal SSCP band (none for 16 controls). Their IGF-I promoter gene were sequenced with modified Maxam-Gilbert method. One subject had 2 point mutations(+8 and +74). Conclusion: We found point mutations of IGF-I promoter in FSS group, This position was regarded as HNF(hepatic nuclear factor)-3 binding sites. We needed more study for the detection of its biological function according io linear growth with in vivo and in vitro study.
