title: [Effects of Gukang on bone-source alkaline phosphatase (BALP) and insulin-like growth factor-1 (IGF-1) in serum of spaying rats].
abstract: OBJECTIVE
  To investigate the effects of Gukang on bone-source alkaline phosphatase (BALP) and insulin-like growth factor 1 (IGF-1) in serum of spaying rats and the mechanism of curative effect of Gukang on osteoporosis.
  
  
  METHODS
  Sixty-eight 6-month-old SD rats were chosen and randomly divided into blank control group (22 rats with sham operation) and operation group (46 rats with spaying operation). Three months after operation, 10 rats were randomly chosen from each group and tested with bone mineral density in order to determine models of osteoporosis made. After modeling, operation group was divided into 3 sub-groups: operation model group, estrogen group and Gukang group, 12 rars in each group. Twelve rats remained in blank control group. Every group were treated through intragastric administration therapy (volume 10 ml/kg). Blank control group and operation model group were irrigated with distilled water,estrogen group with estrogen and Gukang group with Gukang. Three months after treatment, serum of all groups were collected and tested for E2, BALP and IGF-1 with ELISA.
  
  
  RESULTS
  The concentration of serum E2, BALP in estrogen group and Gukang group were higher than operation model group, there were significant difference (P < 0.05), but no significant difference in serum E2 between estrogen group and Gukang group (P > 0.05). The concentration of serum IGF-1 in Gukang group was higher than operation model group and blank control group, there were significant difference (P < 0.05).
  
  
  CONCLUSIONS
  Gukang can increase the level of E2, BALP and IGF-1 in serum of spaying rats. Thus, it can indirectly promote reproduction of osteoblasts, inhibit activity of osteoclasts and promote bone formation.
authors.affiliation: Department of TCM Orthopaedics, the 2nd Hospital Affiliated to Guangzhou Medical College, Guangzhou 510260, Guangdong, China. fanyia@yahoo.com.cn
authors.forename: Yi-fan
authors.initials: YF
authors.lastname: Chen
authors.forename: Hong-xing
authors.initials: HX
authors.lastname: Huang
authors.forename: Ying
authors.initials: Y
authors.lastname: Li
mesh_terms: D000469:Alkaline Phosphatase / Q000097:blood*; D000818:Animals; D015519:Bone Density / Q000187:drug effects; D004365:Drugs, Chinese Herbal / Q000494:pharmacology*; D004967:Estrogens / Q000097:blood; D005260:Female; D006801:Humans; D007334:Insulin-Like Growth Factor I / Q000378:metabolism*; D010024:Osteoporosis / Q000188:drug therapy* / Q000378:metabolism / Q000503:physiopathology; D011897:Random Allocation; D051381:Rats; D017207:Rats, Sprague-Dawley; D013245:Sterilization, Reproductive
chemical_list: D004365:Drugs, Chinese Herbal; D004967:Estrogens; D007334:Insulin-Like Growth Factor I; D000469:Alkaline Phosphatase