CORONARY BLOOD FLOW DEVELOPMENT--ROLE OF ADENOSINE

出生和成熟与血液流动的巨大变化有关 调控 一种重要的血流调节剂是腺苷（ADO）。 然而，几乎没有关于ADO开发变化的信息 调节血流。 这项调查的中心假设是 ADO对冠状动脉血流的调节将随着发育而改变， 这些变化可以用ADO产生的细胞差异来解释， 新陈代谢. 为了解决这个假设，我们将完成以下任务： 第一章） 目的与腺苷和冠状动脉血流的局部调节有关。 目的IA：测定发育过程中腺苷的产生。 目的1B：确定发育期间对腺苷的反应。 二.） 目的与发育差异的细胞基础有关。 目的IIA：测定发育过程中心肌细胞产生ADO的能力。 目的IIB：测定血管平滑肌中腺苷酸（ADO）对cAMP和cGMP的影响 细胞 目的：测定心脏内皮细胞对ADO的摄取和转运 细胞 了解冠状动脉血流调节的机制将提供新的 关于心脏发育的信息，并可能提供信息， 与早产儿和新生儿管理的临床相关性 先天性心脏病

Birth and maturation are associated with dramatic alterations in blood flow regulation. One important modulator of blood flow is adenosine (ADO). However, little information exists about developmental changes in ADO modulation of blood flow. The central hypothesis of this investigation is that ADO modulation of coronary blood flow will change with development and the changes can be explained by cellular differences in ADO production and metabolism. To address this hypothesis we will accomplish the following: I.) Aims related to adenosine and local regulation of coronary flow. Aim IA: Determine adenosine production during development. Aim IB: Determine response to adenosine during development. II.) Aims related to cellular basis of developmental differences. Aim IIA: Determine ADO production by myocytes during development. Aim IIB: Determine ADO changes in cAMP and cGMP in vascular smooth muscle cells. Aim IIC: Determine uptake and transport of ADO in cardiac endothelial cells. Understanding the mechanisms of coronary flow regulation will provide new information about cardiac development and may provide information with clinical relevance to the management of premature infants and newborns with congenital heart disease.