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Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Int+J+Nephrol+Renovasc+Dis 2018 ; 11 (ä): 81-92 Nephropedia Template TP
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The importance of the thick ascending limb of Henle s loop in renal physiology and pathophysiology #MMPMID29497325
Zacchia M; Capolongo G; Rinaldi L; Capasso G
Int J Nephrol Renovasc Dis 2018[]; 11 (ä): 81-92 PMID29497325show ga
The thick ascending limb (TAL) of Henle's loop is a crucial segment for many tasks of the nephron. Indeed, the TAL is not only a mainstay for reabsorption of sodium (Na(+)), potassium (K(+)), and divalent cations such as calcium (Ca(2+)) and magnesium (Mg(2+)) from the luminal fluid, but also has an important role in urine concentration, overall acid-base homeostasis, and ammonia cycle. Transcellular Na(+) transport along the TAL is a prerequisite for Na(+), K(+), Ca(2+), Mg(2+) homeostasis, and water reabsorption, the latter through its contribution in the generation of the cortico-medullar osmotic gradient. The role of this nephron site in acid-base balance, via bicarbonate reabsorption and acid secretion, is sometimes misunderstood by clinicians. This review describes in detail these functions, reporting in addition to the well-known molecular mechanisms, some novel findings from the current literature; moreover, the pathophysiology and the clinical relevance of primary or acquired conditions caused by TAL dysfunction are discussed. Knowing the physiology of the TAL is fundamental for clinicians, for a better understanding and management of rare and common conditions, such as tubulopathies, hypertension, and loop diuretics abuse.