Amiloride-sensitive Na+ channels are an important component of the Na+ reabsorption pathway in a number of epithelia. Here we report the cloning and characterization of cDNAs encoding two subunits of the human kidney epithelial Na+ channel (beta- and gamma-hENaC). Their predicted amino acid sequences were highly homologous (83-85% identical) to the corresponding subunits reported from rat colon (beta- and gamma-rENaC). Both beta- and gamma-hENaC mapped to human chromosome 16. Northern blot analysis showed high expression of beta- and gamma-hENaC in kidney and lung and differential expression of the three subunits in other tissues. Coexpression of beta- and gamma-hENaC with alpha-hENaC in Xenopus oocytes produced Na+ channels with high selectivity for Na+ and high sensitivity to amiloride. In addition, human subunits were able to substitute for the corresponding rat subunits in forming functional Na+ channels, suggesting conservation of function and suggesting that differences in sequence do not disrupt interactions between subunits. These results suggest that human alpha-, beta-, and gamma-ENaC together form Na+ channels with properties that are similar to those observed in epithelia, and will allow further investigation into the role that these channels may play in human disease.
Pharmacology, Toxicology and Pharmaceutical Science
1
3%
Other
2
6%
Unknown
9
25%
Attention Score in Context
Attention Score in Context
This research output has an Altmetric Attention Score of 6. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 13 May 2021.
All research outputs
#7,394,515
of 33,992,632 outputs
Outputs from American Journal of Physiology: Cell Physiology
#811
of 4,755 outputs
Outputs of similar age
#6,899
of 34,890 outputs
Outputs of similar age from American Journal of Physiology: Cell Physiology
#1
of 24 outputs
Altmetric has tracked 33,992,632 research outputs across all sources so far. This one has received more attention than most of these and is in the 73rd percentile.
So far Altmetric has tracked 4,755 research outputs from this source. They typically receive a little more attention than average, with a mean Attention Score of 5.8. This one has done well, scoring higher than 76% of its peers.
Older research outputs will score higher simply because they've had more time to accumulate mentions. To account for age we can compare this Altmetric Attention Score to the 34,890 tracked outputs that were published within six weeks on either side of this one in any source. This one has gotten more attention than average, scoring higher than 63% of its contemporaries.
We're also able to compare this research output to 24 others from the same source and published within six weeks on either side of this one. This one has done particularly well, scoring higher than 91% of its contemporaries.
