Association of Osteoprotegerin Gene Polymorphisms with bone Mass in Postmenopausal Korean Women / 대한산부인과학회잡지

OBJECTIVE: To examine the relationship between Osteoprotegerin gene polymorphisms, and bone mineral density (BMD). METHODS: Restriction fragment length polymorphisms at the Osteoprotegerin A163G, T950C, G1181C gene site, and BMD at the lumbar spine and proximal femur were analyzed in 229 postmenopausal Korean women (81 normal, 111 osteopenic and 37 osteoporotic patients). BMDs were measured by DEXA. The subjects were divided in normal, osteopenic and osteoporotic on the basis of the T-score values according to the classification of the World Health Organization (WHO). RESULTS: The genotype distribution of A163G, T950C and G1181C polymorphisms in all postmenopausal women was as follows: AA 54.6%, AG 37.1%, GG 8.3%, T/T 17.5%, T/C 44.1%, C/C 38.4%; GG 52.4%, GC 38.0%, CC 9.6%, respectively. Significant differences in the distribution of A/A and A/G genotype among osteoporotic group were observed. No significant differences in the distribution of T950C and G1181C genotypes among three groups were observed. After adjusting for potential confounding factors such as age, BMI, and menopause duration, A163G polymorphism was significantly associated with BMD at the lumbar spine in normal and osteoporotic patients and BMD at the femur neck and wards triangle in normal patients, and G1181C polymorphism BMD at the trochanter in all groups and BMD at the femur neck in osteopenic and osteoporotic patients, and BMD at the wards triangle and trochanter in osteoporotic patients. But There was no relationship between T950C gene polymorphism, and BMD. CONCLUSION: These findings suggest that osteoprotegerin gene polymorphisms may be an important contributor to the variation of BMD among postmenopausal Korean women.

Expression of Fas, Fas-ligand, Bcl-2 and Bad with Maturation of Human Ovarian Follicle / 대한산부인과학회잡지

Human ovarian follicles reduce rapidly in number throughout fetal and adult life. Throughout the menstrual cycles, primordial follicles grow into mature follicles and then ovulate to form corpus luteum. Apoptosis has been implicated in several events that occur during the process of follicular growth, atresia and the regression of the corpus luteum. By the use of immunohistochemistry, we clarified the involvement of apoptosis in the human ovary during follicular growth, regression and atresia by investigating the expression of Fas, Fas-ligand, Bcl-2 and Bad in primordial follicles, primary follicles and mature follicles. Fas immunostaining was present in primordial oocytes, both oocytes and granulosa cells of primary follicles, preantral follicles and all follicular cells of mature follicles. Fas-ligand and Bad immunostaining patterns were similar to those of Fas except for theca cells. Bcl-2 immunostaining was present in both oocytes and granulosa cells of primary, preantral and mature follicles. In corpus luteum, Fas, Fas-ligand, Bcl-2 and Bad immunostaining were observed and decreased in the regressing corpus luteum. In postmenopausal ovary, Fas, Fas-ligand, Bcl-2 and Bad immunostaining were entirely negative. Bad immunostaining was observed but Bcl-2 was not in atretic follicle. These results suggest that Fas, Fas-ligand, Bcl-2 and Bad may play important roles in human ovary during follicular growth, regression and atresia simultaneously. Further studies should be required to elucidate the underlying mechanism and apoptosis of the disease associated with normal and abnormal ovarian aging.

Association of Osteoprotegerin Gene A163G, G1181C Polymorphisms with Bone Mass in Postmenopausal Korean Women / 대한산부인과학회잡지

OBJECTIVE: To examine the relationship between Osteoprotegerin gene polymorphisms, and bone mineral density (BMD). METHODS: Restriction fragment length polymorphisms at the Osteoprotegerin A163G (promoter), G1181C (exon 1) gene site, and BMD at the lumbar spine and proximal femur were analyzed in 229 postmenopausal Korean women (81 normal, 111 osteopenic and 37 osteoporotic patients). BMDs were measured by DEXA. RESULTS: The distribution of A163G and G1181C polymorphisms in all postmenopausal women was as follows: AA 54.6%, AG 37.1%, GG 8.3%; GG 52.4%, GC 38.0%, CC 9.6%, respectively. After adjusting for potential confounding factors such as age, BMI, and menopause duration, A163G polymorphism was significantly associated with BMD at the lumbar spine and G1181C polymorphism BMD at the trochanter in all postmenopausal women. A163G polymorphism was significantly associated with BMD at the lumbar spine in normal and osteoporotic patients, and BMD at the femur neck and wards triangle in normal patients. G1181C polymorphism was significantly associated with BMD at the femur neck in osteopenic and osteoporotic patients, and BMD at the wards triangle and trochanter in osteoporotic patients. CONCLUSION: These findings suggest that osteoprotegerin gene polymorphisms may be an important contributor to the variation of BMD among postmenopausal Korean women.

Association of Vitamin D Receptor, Estrogen Receptor, Transforming Growth Factor-beta1 and Interleukin-6 Gene Polymorphism with Bone Mass in Postmenopausal Korean Women / 대한산부인과학회잡지

OBJECTIVE: To evaluate the relationship between vitamin D receptor (VDR), estrogen receptor (ER), transforming growth factor-beta1 (TGF-beta1) and interleukin-6 (IL-6) gene polymorphism, and bone mineral density (BMD). MATERIALS AND METHODS: Restriction fragment length polymorphisms at the VDR Fok I, ER Pvu II, TGF-beta1 T869C and IL-6 G174C gene sites, and BMD at the lumbar spine, proximal femur were analyzed in 161 postmenopausal Korean women. The subjects were divided in normal, osteopenic, and osteoporotic on the basis of the T-score values according to the classification of the World Health Organization (WHO). RESULTS: The genotype distribution of VDR, ER, TGF-beta1 and IL-6 gene polymorphism was as follows: FF 32.9%, Ff 50.9%, ff 16.2%; PP 13.6%, Pp 48.4%, pp 38.0%; T/T 74.1%, T/C 12.4%, C/C 13.1%; G/G 99.4%, G/C 0.6%. Significant differences in the distribution of FF genotype among normal, osteopenic and osteoporotic group were observed. No significant differences in the distribution of ER and TGF-beta1 genotypes among three groups were observed. BMD at all sites in the FF genotype was significantly higher than in the Ff and ff genotypes. There was no relationship between ER and TGF-beta1 gene polymorphism, and BMD. By combining VDR, ER and TGF-1 genotypes, BMD at lumbar spine, femur neck and ward triangle in the FFPp genotype was significantly higher than in the FfPp, Ffpp and ffpp genotypes, and BMD at femur neck and ward triangle in the FFTT genotype was significantly higher than in the FfTT and ffTT genotypes. CONCLUSION: The results suggest that VDR Fok I polymorphisms, singly and in relation to ER Pvu II and TGF-beta1 T869C polymorphism, may influence bone mass in postmenopausal Korean women.