SOLUTE AND WATER TRANSPORT IN RENAL EPITHELIA

肾上皮中的溶质和水运输

• 批准号: 3757626
• 负责人: M A KNEPPER
• 金额: --
• 依托单位: NATIONAL HEART, LUNG, AND BLOOD INSTITUTE
• 依托单位国家: 美国
• 资助国家: 美国
• 起止时间: 至
• 项目状态: 未结题
• 来源: https://reporter.nih.gov/project-details/3757626
• 关键词: biological fluid transport; cell water; chlorine; electrolyte balance; epithelium; excretion; gene expression; homeostasis; ion transport; kidney cell; kidney function; kidney metabolism; mathematical model; messenger RNA; renal tubular transport; saluresis; sodium; transport proteins; urea; vasopressins

The kidney contains several distinct epithelia that, in their aggregate function, are responsible for formation of the urine and the maintenance of fluid and electrolyte homeostasis. We are studying the roles of these epithelia in the regulation of the excretion of water, urea, sodium, and chloride. The central approach is to dissect the epithelia from the kidney and to study their functions in vitro. These studies measure the transport by the epithelia, the level of expression of various transport proteins in renal tubules, intracellular signalling in individual renal tubule segments, and the levels of nucleic acids (mRNA) that are involved in the regulation of both the transport and metabolic functions of the epithelia. The data are analyzed and integrated using mathematical models of transport in the kidney. The current focus is on: 1) the action of vasopressin in the regulation of water channel and urea carrier function in the renal collecting duct; 2) the molecular physiology of the urinary concentrating mechanism.

肾脏包含几个不同的上皮细胞，它们聚集在一起