ArticleFukushima journal of medical science2016
Swelling-activated and arachidonic acid-induced currents are TREK-1 in rat bladder smooth muscle cells.
Article in Fukushima journal of medical science, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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Who cites it
5 citing papers in PubMed, 8 citations in OpenAlex.
- Long-term follow-up of TREK-1 KO mice reveals the development of bladder hypertrophy and impaired bladder smooth muscle contractility with age.American journal of physiology. Renal physiology · 2024Article
- Negative Influence by the Force: Mechanically Induced Hyperpolarization via KInternational journal of molecular sciences · 2021Review
- Mechanotransduction in gastrointestinal smooth muscle cells: role of mechanosensitive ion channels.American journal of physiology. Gastrointestinal and liver physiology · 2021Review
- Tandem pore TWIK-related potassium channels and neuroprotection.Neural regeneration research · 2019Review
- Effects of sevoflurane on rats with ischemic brain injury and the role of the TREK-1 channel.Experimental and therapeutic medicine · 2017Article
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Authors and funding
3 authors at 1 institution in 1 country.
Funding
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Abstract
Using the perforated patch voltage clamp, we investigated swelling-activated ionic channels (SACs) in rat urinary bladder smooth muscle cells. Hypo-osmotic (60%) bath solution increased a membrane current which was inhibited by the SAC inhibitor, gadolinium. The reversal potential of the hypotonicity-induced current shifted in the positive direction by increasing external K(+) concentration. The hypotonicity-induced current was inhibited by extracellular acidic pH, phorbol ester and forskolin. These pharmacological properties are identical to those of arachidonic acid-induced current present in these cells, suggesting the presence of TREK-1, a four-transmembrane two pore domain K(+) channel. Using RT-PCR we screened rat bladder smooth muscles and cerebellum for expression of TREK-1, TREK-2 and TRAAK mRNAs. Only TREK-1 mRNA was expressed in the bladder, while all three were expressed in the cerebellum. We conclude that a mechanosensitive K(+) channel is present in rat bladder myocytes, which is activated by arachidonic acid and most likely is TREK-1. This K(+) channel may have an important role in the regulation of bladder smooth muscle tone during urine storage.
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