title: [Effects of cysteamine on the plasma levels of SS and some metabolic hormones in adult geese].
abstract: OBJECTIVE
  To know the effect of cysteamine (CS) on the plasma levels of somatostatin (SS) and some metabolic hormones in adult geese.
  
  
  METHODS
  Fourteen adult crossbred geese (Chuan white x Tai lake) fitted with chronic wing vein cannulas were used in this study to evaluate the effect of CS on SS, TSH, T3 and T4 levels. The experiment was consisted of control and treated phase. The diet was added CS at dosage of 100 mg/kg bw on the first day of the treated phase. The blood samples were collected from the cannulas and analyzed by radioimmunoassay.
  
  
  RESULTS
  The plasma SS concentration was (1.87 +/- 0.10) microg/L in control phase. Whereas SS concentrations on day 1, 3, 5, 7 of treated phase were decreased markedly (P < 0.05 or P < 0.01). Thereafter it was rose on the seventh day, however it was still lower than that of control. The thyroid stimulating hormone (TSH) content (2.45 +/- 0.31 mIU/L) was significantly decreased by 21.63% (P < 0.01) on day 1, and 18.37% (P > 0.05) on day 3 and day 5. Comparing with control phase (5.41 +/- 0.98 microg/L), T4 contents were elevated by 60.26% (P < 0.01), 43.25% (P < 0.01), 37.15% (P < 0.01) and 16. 82% (P < 0.01) respectively on day 1, 3, 5, 7. T3 level was (1.05 +/- 0.06) microg/L in control phase, whereas the levels was significantly increased by 36.19% (P < 0.01) on day 3. Also, the insulin concentration was higher than that of control (4.43 +/- 0.41 mU/ L) by 18.28% (P < 0.05) on the day 5.
  
  
  CONCLUSIONS
  These results indicate that CS can decrease the plasma SS and TSH levels, whereas increase the levels of T4, T3 and insulin, therefore change metabolism, improve the nutrition transform and accelerate the growth in geese.
authors.affiliation: Animal Science Department, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai 201101, China.
authors.forename: Xiao-Jie
authors.initials: XJ
authors.lastname: Ai
authors.forename: Yuan-Lin
authors.initials: YL
authors.lastname: Zheng
authors.forename: Wei-Hua
authors.initials: WH
authors.lastname: Chen
authors.forename: Zheng-Kang
authors.initials: ZK
authors.lastname: Han
mesh_terms: D000818:Animals; D003543:Cysteamine / Q000494:pharmacology*; D004032:Diet; D005777:Geese; D007328:Insulin / Q000097:blood; D013004:Somatostatin / Q000097:blood*; D013972:Thyrotropin / Q000097:blood; D013974:Thyroxine / Q000097:blood; D014284:Triiodothyronine / Q000097:blood
chemical_list: D007328:Insulin; D014284:Triiodothyronine; D013004:Somatostatin; D003543:Cysteamine; D013972:Thyrotropin; D013974:Thyroxine