Objective:To investigate the relationship between polymorphism within the 5'-untranslated region(5'-UTR)of IGF-I gene and its periparturient concentration in Iranian Holstein dairy cows.Methods:Blood samples(5...Objective:To investigate the relationship between polymorphism within the 5'-untranslated region(5'-UTR)of IGF-I gene and its periparturient concentration in Iranian Holstein dairy cows.Methods:Blood samples(5 mL,n=37)were collected by caudal venipuncture from each animal into sample lubes containing the EDTA and DNA was extracted from blood.In order to measure ICF-I concentration the collection of blood samples(n=111)was also done at 14 d before calving(prepartum),25 and 45 d postpartum.Results:We found evidence for a significant effect of C to T mutation in position 512 of IGF-I gene on its serum concentration in dairy cows in Iran.Cows with CC genotype had significantly higher concentration(Mean-SD)of IGF-I at 14 d prepartum(91.8±18.1)μg/L compared to those with TT genotype(73.3±14.4)μg/L(P=0.04).A significant trend(quadratic)was found for IGF-I concentration,as higher in CC cows compared to ones with TT genotype,during the 14 d before calving to 45 d postpartum(P=0.01).Conclusions:We concluded that C/T transition in the promoter region of IGF-I gene can influence the serum concentration of ICF-I in periparturient dairy cows.展开更多
AIM:To study the association of serum insulin-like growth factor-I(IGF-I) with diabetic retinopathy.· METHODS:Serum IGF-1 levels were measured in 25 pregnant diabetic patients and 25 pregnant non-diabetic patient...AIM:To study the association of serum insulin-like growth factor-I(IGF-I) with diabetic retinopathy.· METHODS:Serum IGF-1 levels were measured in 25 pregnant diabetic patients and 25 pregnant non-diabetic patients who were matched for age,ethnicity,parity and period of gestation.Fundus examination was performed in both groups at 28,32 and 36 weeks of gestation.RESULTS:The serum IGF-I level was significantly elevated in pregnant diabetics compared to pregnant non-diabetics(366±199μg/L vs 184±89μg/L,(P=0.0001) at 24 weeks,535±251μg/L vs 356±89μg/L,(P=0.007) at 32 weeks and 404±166μg/L vs 264±113μg/L,(P=0.003) at 36 weeks of gestation).The pregnant diabetics with established diabetes had significantly higher IGF-1 level than gestational diabetes at 28,32 and 36 weeks of gestation.The serum IGF-I level in pregnant diabetics with retinopathy was significantly higher than in those without retinopathy at all periods of gestation.· CONCLUSION:Increased serum IGF-1 in pregnancy may increase the risks for retinopathy.展开更多
基金supported by grant of the School of Veterinary MedicineShiraz University(grant number:87GRVT47)and partly by National Elite Foundation of Iran(number:88GRDIM83440)
文摘Objective:To investigate the relationship between polymorphism within the 5'-untranslated region(5'-UTR)of IGF-I gene and its periparturient concentration in Iranian Holstein dairy cows.Methods:Blood samples(5 mL,n=37)were collected by caudal venipuncture from each animal into sample lubes containing the EDTA and DNA was extracted from blood.In order to measure ICF-I concentration the collection of blood samples(n=111)was also done at 14 d before calving(prepartum),25 and 45 d postpartum.Results:We found evidence for a significant effect of C to T mutation in position 512 of IGF-I gene on its serum concentration in dairy cows in Iran.Cows with CC genotype had significantly higher concentration(Mean-SD)of IGF-I at 14 d prepartum(91.8±18.1)μg/L compared to those with TT genotype(73.3±14.4)μg/L(P=0.04).A significant trend(quadratic)was found for IGF-I concentration,as higher in CC cows compared to ones with TT genotype,during the 14 d before calving to 45 d postpartum(P=0.01).Conclusions:We concluded that C/T transition in the promoter region of IGF-I gene can influence the serum concentration of ICF-I in periparturient dairy cows.
文摘AIM:To study the association of serum insulin-like growth factor-I(IGF-I) with diabetic retinopathy.· METHODS:Serum IGF-1 levels were measured in 25 pregnant diabetic patients and 25 pregnant non-diabetic patients who were matched for age,ethnicity,parity and period of gestation.Fundus examination was performed in both groups at 28,32 and 36 weeks of gestation.RESULTS:The serum IGF-I level was significantly elevated in pregnant diabetics compared to pregnant non-diabetics(366±199μg/L vs 184±89μg/L,(P=0.0001) at 24 weeks,535±251μg/L vs 356±89μg/L,(P=0.007) at 32 weeks and 404±166μg/L vs 264±113μg/L,(P=0.003) at 36 weeks of gestation).The pregnant diabetics with established diabetes had significantly higher IGF-1 level than gestational diabetes at 28,32 and 36 weeks of gestation.The serum IGF-I level in pregnant diabetics with retinopathy was significantly higher than in those without retinopathy at all periods of gestation.· CONCLUSION:Increased serum IGF-1 in pregnancy may increase the risks for retinopathy.
