convoluted tubule


Also found in: Medical, Encyclopedia, Wikipedia.

con′voluted tu′bule



n.
the portion of a kidney nephron that concentrates urine and maintains salt and water balance.
[1945–50]
References in periodicals archive ?
B: As the filtrate travels along the proximal convoluted tubule, sodium is reabsorbed by the cells lining the tubule walls via carbonic anhydrase--an enzyme that produces hydrogen ions which are then exchanged for sodium.
[7] Thirdly, trimethoprim interferes with creatinine secretion in the proximal convoluted tubule. This results in increased serum creatinine without affecting the glomerular filtration rate (GFR).
But rats have an additional duct called granular convoluted tubule (GCT) which is an extension of striated duct, present distal to it7 and lies between striated and intercalated ducts.1,6 These are more prominent in rat submandibular glands.
It blocks the Sodium-chloride Co-transporter in the distal convoluted tubule thereby decreasing blood volume and controlling hypertension.
However, the ubiquitin-proteasome system has been proved to play a crucial role in the various aspects of neuronal development, and Cullin 3-KLHL20-E3 ubiquitin ligase complex facilitated neurite outgrowth through a ubiquitin-dependent pathway.[3] Moreover, the constitutive activation of thiazide-sensitive NaCl cotransporter (NCC) in the distal convoluted tubule was confirmed as the pathogenesis of PAHII that could affect the gamma-aminobutyric acid neurotransmitter conduction,[4] which in turn could affect the excitability of neurons, leading to nervous system symptoms.
Thiazides and similar produce and increase in sodium and lithium reabsorption in the proximal convoluted tubule (where their reabsorption is more relevant).
Supportive findings include the expression of proximal convoluted tubule markers (CD10 and alpha-methylacyl-CoA racemase; AMACR), distal nephron proteins (parvalbumin, high-molecular-weight CK, and CD19) [1, 6], and the detection of intercalated cells and cells similar to those in the proximal tubule using electron microscopy [1, 7, 8].
Using this mouse model, we have demonstrated marked differences in renal structure and function between the Hp 1-1 and Hp 2-2 DM mice; Hp 2-2 DM mice had a significant increase of iron deposits in the lysosomes of the kidney proximal convoluted tubule cells (PCT) with lysosomal and renal damage as well as increased features of glomerular disease characteristic of early human DN [7, 13, 14].
The immunoreactivity was weak in the glomerulus and the peritubular capillary (Pcap), but no staining was noted in the proximal convoluted tubule (PCT), the distal convoluted tubule (DCT), or the CCD.
iNOS mRNA has been detected in the S3 segment of the proximal tubule, mTAL, distal convoluted tubule, cortical collecting duct, and inner medullary collecting duct [36].
Mutations in SLC12A3 impair the function of the sodium-chloride co-transporter (NCCT) of the distal convoluted tubule (DCT) (4,8).
Renal cell carcinoma (RCC) is a type of kidney cancer that originates in the lining of the proximal convoluted tubule, a part of the very small tubes in the kidney that transport waste molecules from the blood to the urine.