Kidney Physiology
Mostrando 25-36 de 49 artigos, teses e dissertações.
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25. Urea Utilization by Leptospira
One representative of each of five different pathogenic serotypes of Leptospira as well as one saprophytic strain were capable of growing on medium containing urea in place of an ammonium salt as a nitrogen source. Growth of all of the organisms tested on 1% urea was substantial, but only those that exhibited strong urease activity could grow to any apprecia
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26. System for Studying Uninfected and Virus-Infected Cell Cultures in Hyperbaric Chambers1
Equipment and techniques previously used to investigate the effect of hyperbaric gases on bacteria were modified to permit comparable investigations with uninfected and virus-infected tissue cell cultures. This report describes the modified equipment and related methodology. Use of the system is illustrated with findings on the effect of oxygen-helium mixtur
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27. The Correlated Appearance of Prolamellar Bodies, Protochlorophyll(ide) Species, and the Shibata Shift during Development of Bean Etioplasts in the Dark 1
The structure and physiology of the etioplast was investigated in developing primary leaves of 3- to 9-day-old dark-grown bean (Phaseolus vulgaris L. var. Red Kidney) seedlings. Increase in total protochlorophyll(ide) content followed that of leaf fresh weight. In 3- to 4-day-old bean leaves more than 50% of the protochlorophyll(ide) is in the form of protoc
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28. Heme oxygenase: the key to renal function regulation
Heme oxygenase (HO) plays a critical role in attenuating the production of reactive oxygen species through its ability to degrade heme in an enzymatic process that leads to the production of equimolar amounts of carbon monoxide and biliverdin/bilirubin and the release of free iron. The present review examines the beneficial role of HO-1 (inducible form of HO
American Physiological Society.
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29. A new endogenous natriuretic factor: LLU-alpha.
For over three decades, renal physiology has sought a putative natriuretic hormone (third factor) that might control the body's pool of extracellular fluid, an important determinant in hypertension, congestive heart failure, and cirrhosis. In our search for this hormone, we have isolated several pure natriuretic factors from human uremic urine that would app
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30. Relaxin is essential for renal vasodilation during pregnancy in conscious rats
Marked vasodilation in the kidney and other nonreproductive organs is one of the earliest maternal adaptations to occur during pregnancy. Despite the recognition of this extraordinary physiology for over four decades, the gestational hormone responsible has remained elusive. Here we demonstrate a key role for relaxin, a member of the IGF family that is secre
American Society for Clinical Investigation.
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31. High-Throughput Screening Reveals a Small-Molecule Inhibitor of the Renal Outer Medullary Potassium Channel and Kir7.1
The renal outer medullary potassium channel (ROMK) is expressed in the kidney tubule and critically regulates sodium and potassium balance. The physiological functions of other inward rectifying K+ (Kir) channels expressed in the nephron, such as Kir7.1, are less well understood in part due to the lack of selective pharmacological probes targeting inward rec
The American Society for Pharmacology and Experimental Therapeutics.
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32. Molecular modulation of calcium oxalate crystallization by osteopontin and citrate
Calcium oxalate monohydrate (COM), which plays a functional role in plant physiology, is a source of chronic human disease, forming the major inorganic component of kidney stones. Understanding molecular mechanisms of biological control over COM crystallization is central to development of effective stone disease therapies and can help define general strateg
National Academy of Sciences.
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33. Alterations in the regulation of androgen-sensitive Cyp 4a monooxygenases cause hypertension
Hypertension is a leading cause of cardiovascular, cerebral, and renal disease morbidity and mortality. Here we show that disruption of the Cyp 4a14 gene causes hypertension, which is, like most human hypertension, more severe in males. Male Cyp 4a14 (−/−) mice show increases in plasma androgens, kidney Cyp 4a12 expression, and the formation of proh
The National Academy of Sciences.
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34. Induction of calcium-dependent nitric oxide synthases by sex hormones.
We have examined the effects of pregnancy and sex hormones on calcium-dependent and calcium-independent nitric oxide synthases (NOSs) in the guinea pig. Pregnancy (near term) caused a > 4-fold increase in the activity of calcium-dependent NOS in the uterine artery and at least a doubling in the heart, kidney, skeletal muscle, esophagus, and cerebellum. The i
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35. Aldosterone Modulates Steroid Receptor Binding to the Endothelin-1 Gene (edn1)*
Aldosterone and endothelin-1 (ET-1) act on collecting duct cells of the kidney and are important regulators of renal sodium transport and cardiovascular physiology. We recently identified the ET-1 gene (edn1) as a novel aldosterone-induced transcript. However, aldosterone action on edn1 has not been characterized at the present time. In this report, we show
American Society for Biochemistry and Molecular Biology.
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36. Identification of nuclear tau isoforms in human neuroblastoma cells.
The tau proteins have been reported only in association with microtubules and with ribosomes in situ, in the normal central nervous system. In addition, tau has been shown to be an integral component of paired helical filaments, the principal constituent of the neurofibrillary tangles found in brains of patients with Alzheimer disease and of most aged indivi