Relationships between the plasma concentrations of insulin-like growth factor-I in dairy cows and their fertility and milk yield

2004 ◽  
Vol 155 (19) ◽  
pp. 583-588 ◽  
Author(s):  
V. J. Taylor ◽  
Z. Cheng ◽  
P. G. A. Pushpakumara ◽  
D. C. Wathes ◽  
D. E. Beever
Keyword(s):  
Growth Factor ◽  
Dairy Cows ◽  
Milk Yield ◽  
Plasma Concentrations ◽  
Insulin Like Growth Factor ◽  
Factor I ◽  
Growth Factor I

scholarly journals 21. Plasma concentrations of insulin-like growth factor-I (IGF-I) and resumption of cyclicity in pasture-fed dairy cows

2003 ◽  
Vol 15 (9) ◽  
pp. 21
Author(s):  
F. Y. Obese ◽  
T. E. Moyes ◽  
C. S. Pino ◽  
C. R. Stockdale ◽  
K. L. Macmillan ◽  
...  
Keyword(s):  
Growth Factor ◽  
Dairy Cows ◽  
Plasma Concentrations ◽  
Insulin Like Growth Factor ◽  
Factor I ◽  
Igf I ◽  
Growth Factor I

Increased secretion of insulin-like growth factor I into milk of cows treated with recombinantly derived bovine growth hormone

1989 ◽  
Vol 56 (1) ◽  
pp. 17-26 ◽  
Author(s):  
Colin G. Prosser ◽  
Ivan R. Fleet ◽  
Anthony N. Corps
Keyword(s):  
Growth Hormone ◽  
Growth Factor ◽  
Milk Yield ◽  
Plasma Concentrations ◽  
Significant Proportion ◽  
Bovine Growth Hormone ◽  
Insulin Like Growth Factor ◽  
Factor I ◽  
Igf I ◽  
Growth Factor I

SummarySix lactating, non-pregnant Jersey cows were given subcutaneous injections of recombinantly derived bovine growth hormone for 7 d. Milk yield was increased by 4·5 kg/d on d 7, compared with the average yield of 10·7 ± 0·4 kg/d (mean ± s. e. m.) for the 7d preceding treatment. Concentrations of insulin-like growth factor I (IGF-I) in the milk increased from 0·44 ± 0·04 nmol/1 (mean ± s. e. m.) during the 7 d preceding treatment to 1·6 ± 0·2 nmol/1 on d 7 of treatment. Taking the increase in milk yield into account the total increase in the secretion of IGF-I into milk of one udder half was 6-fold. Plasma concentrations of total IGF-I rose from 15·5 + 1·3 nmol/1 (mean ± s. e. m.) on the day preceding treatment to 56·9 ± 3·6 nmol/1 (mean ± s. e. m.) on d 7 of treatment. Mammary plasma flow increased from 1·6 ± 0·09 to 2·2 ± 0·06 1/min udder half over the same time. Estimates of the amount of IGF-I that reached the mammary gland gave values of 24 and 116 nmol/min udder half before and during treatment respectively. IGF-I in milk of treated cows was associated predominantly with proteins ranging from 40000 to 150000 mol. wt, but a significant proportion (19%) of the total IGF-I was present in the free unbound form. IGF-I crosslinking studies revealed the presence in milk of one specifically labelled band at 31000 mol. wt.

Blood Plasma Concentrations of Insulin-like Growth Factor-I (IGF-I) in Resting Standardbred Horses

2002 ◽  
Vol 163 (1) ◽  
pp. 45-50 ◽  
Author(s):  
Z.J. Champion ◽  
B.H. Breier ◽  
W.E. Ewen ◽  
T.T. Tobin ◽  
P.J. Casey
Keyword(s):  
Growth Factor ◽  
Blood Plasma ◽  
Plasma Concentrations ◽  
Insulin Like Growth Factor ◽  
Factor I ◽  
Igf I ◽  
Growth Factor I
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