The scnsitivity of sodium cfltux to the removal of potassium ions from the cxtcrnal solution and the change in sodium cffiux occurring when sodium ions arc also removed were obscrvcd to be rclated. When Tris was used to replace cxtcrnal sodium ions, increases in sodium effiux were always observed whether the sensitivity of sodium cfflux to external potassium ions was weak or strong. Greater per...

High urinary sodium-to-potassium ratio is considered a strong risk factor for hypertension. This study aimed to evaluate excretion of sodium and potassium, we analyzed these levels associated with dietary intake in Japanese adolescent football players. cross-sectional included 120 male Over 24 h, urine was collected measured creatinine, sodium, potassium levels. A assessment performed using sel...

BACKGROUND The 2010 Dietary Guidelines emphasized that dietary sodium should be limited to 2300 mg/d, with a lower limit of 1500 mg/d for adults aged >50 y, non-Hispanic blacks, and those with diabetes, hypertension, or chronic kidney disease. The potassium goal remained at 4700 mg/d. OBJECTIVE The objective was to identify subpopulations for whom the 1500- or 2300-mg Na/d goals applied and t...

Sodium and potassium intake was assessed on the basis of its respective excretion levels in 24 hr urine samples. However, owing to the inconvenience of collection, we evaluated random spot urine for alternative sodium and potassium excretion markers. We included 250 patients who submitted 24 hr- and spot urine for clinical tests. However, 22 patients who showed 24 hr urine creatinine excretion ...

Membrane transport may be effected by specific enzymatic systems. In a search for an enzymatic basis for sodium transport, Skou discovered an adenosine triphosphatase activity in particles from crab nerve which required both sodium and potassium ions together (1, 2). A similar activity was later identified in broken erythrocyte membranes as a part of the active transport system for sodium and p...

• Highlight evidence documenting effect of high sodium intake on high blood pressure and risk of cardiovascular disease • Learn potential impact of reduction in sodium intake on health care costs • Appreciate the sodium-potassium connection and how potassium intake can blunt the effects of sodium on high blood pressure • Present strategies for reducing sodium and increasing potassium intake in ...

DNA and RNA guanine-quadruplexes (G4s) are stabilized by several cations, in particular by potassium and sodium ions. Generally, potassium stabilizes guanine-quartet assemblies to a larger extent than sodium; in this article we report about a higher-order G4 structure more stable in sodium than in potassium. Repeats of the DNA GGGTTA telomeric motif fold into contiguous G4 units. Using three in...