EGF促进RPE细胞β2肾上腺能受体诱导的cAMP形成：受体间交互作用分析

研究证实表皮生长因子(EGF)不影响培养人眼视网膜色常上皮(RPE)细胞cAMP的基础水平，但促进异丙肾上腺索激活β₂受体后诱导cAMP水平升高的效应，井呈量效信赖关系。EGF对腺嘌呤核苷A₂受体激动剂NECA诱导cAMP水子升高的效应没有明显影响．细胞增殖分析表明，EGF刺激人眼RPE细胞增殖，而DibutyrylcAMP和异丙肾上腺素抑制RGF刺激增殖的效应。结果提示，在人眼RPE细胞EGF和β₂受体之间存在受体间交互作用． （中华眼底病杂志，1995，11：25-27）     

Determinants of maternity health care utilization in Tajikistan: Learning from a national living standards survey

This study examines the demographic, economic, social, and geographic factors that help explain maternity health care utilization in Tajikistan, a low-income transitional country in Central Asia, based on a newly available nationally representative living standard survey. Two regression models, namely, a binomial logit model and a zero-inflated negative binomial (ZINB) model are estimated. The estimations of the two models show strikingly consistent results—the year of last childbirth, educational attainment, and the availability of public infrastructure are important predictors of maternity health care utilization. The results also signify an urgent need to overturn the current negative trend in maternity health care utilization. The findings also suggest that many determinants of maternity health care are outside the direct sphere of health care policies, indicating the need of cross-sectional policies in addressing maternity health care utilization, for example, policies and strategies that include contributions from other sectors.