Pulse wave velocity and central aortic pressure in systolic blood pressure intervention trial participants.

Unlabelled: Arterial stiffness, typically assessed as the aortic pulse wave velocity (PWV), and central blood pressure levels may be indicators of cardiovascular disease (CVD) risk. This ancillary study to the Systolic Blood Pressure Intervention Trial (SPRINT) obtained baseline assessments (at randomization) of PWV and central systolic blood pressure (C-SBP) to: 1) characterize these vascular measurements in the SPRINT cohort, and 2) test the hypotheses that PWV and C-SBP are associated with glucose homeostasis and markers of chronic kidney disease (CKD). The SphygmoCor® CPV device was used to assess carotid-femoral PWV and its pulse wave analysis study protocol was used to obtain C-SBP.

The Association between Depression, Perceived Health Status, and Quality of Life among Individuals with Chronic Kidney Disease: An Analysis of the National Health and Nutrition Examination Survey 2011-2012.

Background: Depression is the most common mental health disorder among those with end-stage renal disease (ESRD), with prevalence of 15-40%. However, the association between chronic kidney disease (CKD) and depression is more variable. We examined the associations of CKD with depression, perceived health status, and quality of life in the National Health and Nutrition Examination Survey (NHANES) 2011-2012.

Linking clinic and home: a randomized, controlled clinical effectiveness trial of real-time, wireless blood pressure monitoring for older patients with kidney disease and hypertension.

Objective: Older adults with chronic kidney disease have a high rate of uncontrolled hypertension. Home monitoring of blood pressure (BP) is an integral part of management, but requires that patients bring records to clinic visits. Telemonitoring interventions, however, have not targeted older, less technologically-skilled populations.

Ornithine decarboxylase inhibitor eliminates hyperresponsiveness of the early diabetic proximal tubule to dietary salt.

Heightened sensitivity of the diabetic proximal tubule to dietary salt leads to a paradoxical effect of salt on glomerular filtration rate (GFR) via tubuloglomerular feedback. Diabetic hyperfiltration is a feedback response to growth and hyperreabsorption by the proximal tubule. The present studies were performed to determine whether growth and hyperfunction of the proximal tubule are essential for its hyperresponsiveness to dietary salt and, hence, to the paradoxical effect of dietary salt on GFR.

Regulation of kidney function and metabolism: a question of supply and demand.

Kidney blood flow and glomerular filtration rate (GFR) are maintained relatively constant by hormonal influences and by efficient autoregulation. However, the kidney remains at risk for ischemia and acute kidney injury. Increases in kidney blood flow cause parallel increments in GFR, thereby dictating tubular reabsorption and increased oxygen/metabolic demands.

Combined effects of carbonic anhydrase inhibitor and adenosine A1 receptor antagonist on hemodynamic and tubular function in the kidney.

Background: Carbonic anhydrase inhibitors (CAI) reduce proximal reabsorption, activating tubuloglomerular feedback (TGF) and reducing glomerular filtration rate (GFR). Adenosine A(1) receptors (A(1)R) mediate the TGF response and stimulate proximal reabsorption.

Methods: Clearance and micropuncture studies were performed in Wistar rats to determine whether blockade of A(1)R (KW3902 0.

Kidney oxygen consumption, carbonic anhydrase, and proton secretion.

Oxygen consumed by the kidney (Q(O(2))) is primarily obligated to sodium reabsorption (T(Na)). The relationship of Q(O(2)) to T(Na) (Q(O(2))/T(Na)) may be altered by hormones and autacoids. To examine whether Q(O(2))/T(Na) depends on the mechanism of sodium reabsorption, we first evaluated the effects on Q(O(2)) and Q(O(2))/T(Na) of benzolamide (BNZ), a proximal diuretic that works by inhibiting membrane carbonic anhydrase.

Oxygen consumption in the kidney: effects of nitric oxide synthase isoforms and angiotensin II.

Background: Oxygen mitochondrial effects consumption by the kidney (Qo(2)), is linearly related to sodium reabsorption (T(na)), but recent studies suggest this relationship is variable and that metabolic efficiency (Qo(2)/T(na)) in kidney is regulated by hormonal factors. In the dog, nonselective inhibitors of nitric oxide synthase (NOS) increase Qo(2) and Qo(2)/T(na). Glomerular hemodynamic and reabsorptive consequences of NOS inhibition require angiotensin II (Ang II), implying an antagonistic relationship between nitric oxide and Ang II.