Early detection efforts for colorectal and prostate cancer from the patient's perspective over the course of 12 years: results of the KABOT survey study.

Aim: This study investigates the level of knowledge and utilization of colorectal cancer (CRC) and prostate cancer (PCa) early detection measures (EDMs) over a period of 12 years in general practice from the patient's perspective.

Background: The role of general practitioners (GPs) in EDMs for CRC and PCa in Germany is not well-documented with comprehensive data.

Methods: We conducted a patient-centric survey in the German federal state of Berlin-Brandenburg at a 12-year interval to examine the role of GPs in EDMs for CRC and PCa.

The renin-angiotensin system and the third mechanism of renal blood flow autoregulation.

Autoregulation of renal blood flow comprises three mechanisms: the myogenic response (MR), the tubuloglomerular feedback (TGF), and a third mechanism (3M). The nature of 3M is unknown; it may be related to hypotensive resetting of autoregulation that probably relies on pressure-dependent stimulation of the renin-angiotensin system (RAS). Thus we used a normotensive angiotensin II clamp in anesthetized rats and studied autoregulation 1) by slow ramp-shaped reductions in renal perfusion pressure (RPP) followed by ramp-shaped RPP restorations and 2) by means of the step response technique: after 30 s of either total or partial suprarenal aortic occlusion, a step increase in RPP was made and the response of renal vascular conductance analyzed to assess the mechanisms' strength and initial direction (vasodilation or constriction).