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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    European journal of clinical pharmacology 53 (1998), S. 343-346 
    ISSN: 1432-1041
    Keywords: Key words Neonates ; CYP3A
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Abstract Objective: Urinary 6β-hydroxycortisol/cortisol (6β-OHF/C) ratio was measured in human neonates to assess the CYP3A enzyme activity. Methods: Urinary 6β-OHF/C ratio was determined on the day of birth in 94 neonates including those born prematurely. In addition, changes in the ratios after birth were also determined in 81 neonates. Results: On the day of birth, a significant positive correlation was found between urinary 6β-OHF/C ratios and gestational age (r=0.476) and birth weight (r=0.283). There was no gender difference in the urinary 6β-OHF/C ratios in human neonates. Furthermore, delivery modes such as cesarean section and vaginal delivery did not appear to affect the urinary 6β-OHF/C ratio. The mean ratio of urinary 6β-OHF/C observed in 39 mature neonates (more than 37 weeks of gestational age) was higher than that observed in adults (16.5 vs 9.9). Within 5 days after birth, the ratio rapidly decreased to less than that in adults. In contrast, the mean ratio of urinary 6β-OHF/C observed in 42 premature neonates (under 37 weeks of gestational age) was significantly lower than that observed in mature neonates (5.3 vs 16.5) and was virtually unchanged during the 14-days after birth. Therefore, no significant difference was observed in the mean ratio of urinary 6β-OHF/C between mature and premature neonates at 5 days after birth. Conclusion: From these results, it was concluded that on the day of birth, mature neonates might possess a higher activity of CYP3A enzyme compared with premature neonates, and that the CYP3A enzyme activity in mature neonates might be promptly changed at an early stage after birth.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-0428
    Keywords: Key words Insulin resistance ; non-insulin-dependent diabetes mellitus ; impaired glucose tolerance ; population-based study ; epidemiology ; Japanese ; Hisayama study.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary To elucidate the risk factors for initiating glucose intolerance, the relevant factors were explored in a cross-sectional survey conducted in a sample population aged 40–79 years old selected from a Japanese community, Hisayama, Japan in 1988. A 75-g oral glucose tolerance test was used to classify 1,073 men (72.5 % of the entire population in the same age range) and 1,407 women (80.5 %) into normal, impaired glucose tolerance and diabetes mellitus groups. In all age and sex groups with normal glucose tolerance, the sum of fasting and 2-h post-load insulin values varied widely and demonstrated significant positive correlations with triglycerides, body mass index, waist-hip ratio, systolic and diastolic blood pressure, while it negatively correlated to HDL cholesterol (p 〈 0.05). Insulin resistance was presumed to develop in normal glucose tolerance subjects with hyperinsulinaemia. The sum of the insulin concentrations, triglycerides, body mass index, waist-hip ratio and blood pressure levels was significantly associated with impaired glucose tolerance in all age and sex groups after adjustment for age (p 〈 0.05) and was also related to diabetes in either all or some age and sex groups, respectively (p 〈 0.05). It was shown that glucose intolerance in the general population was associated with the factors related to insulin resistance. These cross-sectional data, therefore, support the hypothesis that insulin resistance is the primary defect in the development of glucose intolerance in the Japanese general population. However, a further prospective study is still needed in order to confirm this hypothesis. [Diabetologia (1994) 37: 897–904]
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1432-0428
    Keywords: Insulin resistance ; non-insulin-dependent diabetes mellitus ; impaired glucose tolerance ; population-based study ; epidemiology ; Japanese ; Hisayama study
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary To elucidate the risk factors for initiating glucose intolerance, the relevant factors were explored in a cross-sectional survey conducted in a sample population aged 40–79 years old selected from a Japanese community, Hisayama, Japan in 1988. A 75-g oral glucose tolerance test was used to classify 1,073 men (72.5% of the entire population in the same age range) and 1,407 women (80.5%) into normal, impaired glucose tolerance and diabetes mellitus groups. In all age and sex groups with normal glucose tolerance, the sum of fasting and 2-h post-load insulin values varied widely and demonstrated significant positive correlations with triglycerides, body mass index, waist-hip ratio, systolic and diastolic blood pressure, while it negatively correlated to HDL cholesterol (p〈0.05). Insulin resistance was presumed to develop in normal glucose tolerance subjects with hyperinsulinaemia. The sum of the insulin concentrations, triglycerides, body mass index, waist-hip ratio and blood pressure levels was significantly associated with impaired glucose tolerance in all age and sex groups after adjustment for age (p〈0.05) and was also related to diabetes in either all or some age and sex groups, respectively (p〈0.05). It was shown that glucose intolerance in the general population was associated with the factors related to insulin resistance. These cross-sectional data, therefore, support the hypothesis that insulin resistance is the primary defect in the development of glucose intolerance in the Japanese general population. However, a further prospective study is still needed in order to confirm this hypothesis.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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