Characterization of neutral amino acid uptake by cultured epithelial cells from pig kidney.

Abstract:

:Two transport systems for neutral amino acids have been characterised in LLC-PK, cells. The first, which transports alanine in a sodium-dependent manner, also mediates alanine exchange and is perferentially inhibited by serine, cysteine, and alpha-amino-n-butyric acid. This system resembles the ASC system in Ehrlich ascites and some other cell types. There is only a small contribution of other systems to alanine uptake. The second, which transports leucine with no requirement for sodium and mediates leucine exchange, is blocked by 2-aminonorbornane-2-carboxylic acid and hydrophobic amino acids. This system is similar to the L system described in other cell types. LLC-PK1 cells retain several other features implying renal proximal tubule origin; our results thus suggest that these transport systems may be involved in the reabsorption of neutral amino acids by the nephron in vivo.

journal_name

J Cell Physiol

authors

Sepúlveda FV,Pearson JD

doi

10.1002/jcp.1041120205

subject

Has Abstract

pub_date

1982-08-01 00:00:00

pages

182-8

issue

2

eissn

0021-9541

issn

1097-4652

journal_volume

112

pub_type

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