ArticleAmerican journal of physiology. Gastrointestinal and liver physiology2012
Role of the BK channel (KCa1.1) during activation of electrogenic K+ secretion in guinea pig distal colon.
Article in American journal of physiology. Gastrointestinal and liver physiology, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers, 1 of them a synthesis that pooled it.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
14 citing papers in PubMed, 1 synthesis or guideline pooled it, 29 citations in OpenAlex.
- Potassium channels in intestinal epithelial cells and their pharmacological modulation: a systematic review.American journal of physiology. Cell physiology · 2021Pooled it
- Dietary NaCellular and molecular life sciences : CMLS · 2023Article
- Intestinal distension orchestrates neuronal activity in the enteric nervous system of adult mice.The Journal of physiology · 2023Article
- Resveratrol Relaxes Human Gastric Smooth Muscles Through High Conductance Calcium-Activated Potassium Channel in a Nitric Oxide-independent Manner.Frontiers in pharmacology · 2022Article
- Goblet cell LRRC26 regulates BK channel activation and protects against colitis in mice.Proceedings of the National Academy of Sciences of the United States of America · 2021Article
- Parallel intermediate conductance KAmerican journal of physiology. Gastrointestinal and liver physiology · 2020Article
- Colonic Potassium Absorption and Secretion in Health and Disease.Comprehensive Physiology · 2018Review
- Dextran sulfate sodium-induced chronic colitis attenuates CaAmerican journal of physiology. Cell physiology · 2018Article
- Mechanism of resveratrol-induced relaxation in the human gallbladder.BMC complementary and alternative medicine · 2017Article
- Intact colonic KPhysiological reports · 2017Article
- Peptide toxins and small-molecule blockers of BK channels.Acta pharmacologica Sinica · 2016Review
- A whole-genome RNAi screen uncovers a novel role for human potassium channels in cell killing by the parasite Entamoeba histolytica.Scientific reports · 2015Article
- Evidence of K+ channel function in epithelial cell migration, proliferation, and repair.American journal of physiology. Cell physiology · 2014Review
- Enhanced K(+) secretion in dextran sulfate-induced colitis reflects upregulation of large conductance apical K(+) channels (BK; Kcnma1).American journal of physiology. Cell physiology · 2013Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
3 authors at 1 institution in 1 country.
Funding
Abstract
Secretagogues acting at a variety of receptor types activate electrogenic K(+) secretion in guinea pig distal colon, often accompanied by Cl(-) secretion. Distinct blockers of K(Ca)1.1 (BK, Kcnma1), iberiotoxin (IbTx), and paxilline inhibited the negative short-circuit current (I(sc)) associated with K(+) secretion. Mucosal addition of IbTx inhibited epinephrine-activated I(sc) ((epi)I(sc)) and transepithelial conductance ((epi)G(t)) consistent with K(+) secretion occurring via apical membrane K(Ca)1.1. The concentration dependence of IbTx inhibition of (epi)I(sc) yielded an IC(50) of 193 nM, with a maximal inhibition of 51%. Similarly, IbTx inhibited (epi)G(t) with an IC(50) of 220 nM and maximal inhibition of 48%. Mucosally added paxilline (10 μM) inhibited (epi)I(sc) and (epi)G(t) by ∼50%. IbTx and paxilline also inhibited I(sc) activated by mucosal ATP, supporting apical K(Ca)1.1 as a requirement for this K(+) secretagogue. Responses to IbTx and paxilline indicated that a component of K(+) secretion occurred during activation of Cl(-) secretion by prostaglandin-E(2) and cholinergic stimulation. Analysis of K(Ca)1.1α mRNA expression in distal colonic epithelial cells indicated the presence of the ZERO splice variant and three splice variants for the COOH terminus. The presence of the regulatory β-subunits K(Ca)β1 and K(Ca)β4 also was demonstrated. Immunolocalization supported the presence of K(Ca)1.1α in apical and basolateral membranes of surface and crypt cells. Together these results support a cellular mechanism for electrogenic K(+) secretion involving apical membrane K(Ca)1.1 during activation by several secretagogue types, but the observed K(+) secretion likely required the activity of additional K(+) channel types in the apical membrane.
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.