WordNet

a continuous tube formed by a row of elongated cells lacking intervening end walls
an enclosed conduit for a fluid
a bodily passage or tube lined with epithelial cells and conveying a secretion or other substance; "the tear duct was obstructed"; "the alimentary canal"; "poison is released through a channel in the snakes fangs" (同)epithelial duct, canal, channel
either of two bean-shaped excretory organs that filter wastes (especially urea) from the blood and excrete them and water in urine; "urine passes out of the kidney through ureters to the bladder"

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1. 腎細胞癌の疫学、病理、および病因 epidemiology pathology and pathogenesis of renal cell carcinoma
2. 先天性腎尿路異常（CAKUT）の概要 overview of congenital anomalies of the kidney and urinary tract cakut
3. 常染色体優性尿細管間質性腎臓病（髄質嚢胞性腎疾患） autosomal dominant tubulointerstitial kidney disease medullary cystic kidney disease
4. 小児における常染色体劣性多発性嚢胞腎 autosomal recessive polycystic kidney disease in children
5. 常染色体優性多発性嚢胞腎の診断およびスクリーニング diagnosis of and screening for autosomal dominant polycystic kidney disease

Williams JC Jr1, Worcester E2, Lingeman JE3.
Urolithiasis.Urolithiasis.2017 Feb;45(1):19-25. doi: 10.1007/s00240-016-0944-z. Epub 2016 Dec 2.
How stones are retained within the kidney while small in size is still not fully understood. In this paper, we show two examples of how stones are retained during early growth: one is growth on Randall's (interstitial) plaque, and the other is growth on mineral that has formed as a luminal plug in a
PMID 27913855

Aquaporin-2 Ser-261 phosphorylation is regulated in combination with Ser-256 and Ser-269 phosphorylation.

Yui N1, Sasaki S2, Uchida S2.
Biochemical and biophysical research communications.Biochem Biophys Res Commun.2017 Jan 22;482(4):524-529. doi: 10.1016/j.bbrc.2016.11.118. Epub 2016 Nov 23.
Aquaporin-2 (AQP2) is a water channel in collecting duct principal cells in the kidney. Vasopressin catalyzes AQP2 phosphorylation at several serine sites in its C-terminus: Ser-256, Ser-261, and Ser-269. Upon stimulation by vasopressin, Ser-269 phosphorylation increases and Ser-261 phosphorylation
PMID 27889609

Urinary Exosomes Contain MicroRNAs Capable of Paracrine Modulation of Tubular Transporters in Kidney.

Gracia T1, Wang X2, Su Y1, Norgett EE1, Williams TL3, Moreno P1, Micklem G4, Frankl FE1.
Scientific reports.Sci Rep.2017 Jan 17;7:40601. doi: 10.1038/srep40601.
Exosomes derived from all nephron segments are present in human urine, where their functionality is incompletely understood. Most studies have focused on biomarker discovery rather than exosome function. Through sequencing we identified the miRNA repertoire of urinary exosomes from healthy volunteer
PMID 28094285