title: [Polymorphism of parathyroid hormone gene and its association with bone mineral density of Han nationality women in Beijing area].
abstract: OBJECTIVE
  To investigate the distribution of frequency of parathyroid hormone(PTH) gene polymorphisms in healthy adults of Han nationality in Beijing area and relationship between PTH genotypes and bone mineral density(BMD) in young and postmenopausal women.
  
  
  METHODS
  Polymorphism of PTH gene were detected by polymerase chain reaction restriction fragment length polymorphism(PCR-RFLP) of restriction enzyme Bst B1 in 270 subjects. If the site of enzyme Bst B1 existed, the PTH genotype was "B". On the contrary, if base mutation occurred, the genotype was "b". Some of the PTH genotypes were confirmed by DNA sequences analysis. Bone mineral density(BMD) was measured by dual-energy X-ray absorptiometry.
  
  
  RESULTS
  Genotype frequencies of BB, Bb, bb were 73.7%, 25.9%, and 0.4% respectively in adults of Beijing areas. The frequencies of RFLP alleles B, b were 86.7% and 13.3%. Beijing postmenopausal women frequencies of BB, Bb, bb were 67.1%, 32.2% and 0.7%. B, b alleles frequencies were 83.2% and 16.8%. We statistically compared bone mineral density at the lumbar 2-4, neck, wards triangle and trochanter major, there was no significant difference between BB and Bb genotype of young women and postmenopausal women groups. Otherwise, no obvious relationship was found between the BMD and PTH genotype in Beijing women.
  
  
  CONCLUSIONS
  PTH gene polymorphisms were not associated with BMD in Beijing women.
authors.affiliation: Department of Endocrinology, PUMC Hospital, CAMS, PUMC, Beijing 100730, China. limeilzh@yahoo.com
authors.forename: M
authors.initials: M
authors.lastname: Li
authors.forename: X W
authors.initials: XW
authors.lastname: Meng
authors.forename: X Y
authors.initials: XY
authors.lastname: Zhou
authors.forename: X P
authors.initials: XP
authors.lastname: Xing
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D044466:Asian People; D015519:Bone Density; D005260:Female; D005787:Gene Frequency; D005838:Genotype; D006801:Humans; D008297:Male; D008875:Middle Aged; D010281:Parathyroid Hormone / Q000235:genetics*; D016133:Polymerase Chain Reaction; D012150:Polymorphism, Restriction Fragment Length
chemical_list: D010281:Parathyroid Hormone