title: Effects of adenosine stimulation on the mRNA expression of CLCNKB in the basolateral medullary thick ascending limb of the rat kidney.
abstract: Adenosine is a molecule produced by several organs within the body, including the kidneys, where it acts as an autoregulatory factor. It mediates ion transport in several nephron segments, including the proximal tubule and the thick ascending limb (TAL). Ion transport is dictated in part by anionic chloride channels, which regulate crucial kidney functions, including the reabsorption of Na+ and Cl‑, urine concentration, and establishing and maintaining the corticomedullary osmotic gradient. The present study investigated the effects of adenosine on the mRNA expression of chloride voltage‑gated channel Kb (CLCNKB), a candidate gene involved in hypertension, which encodes for the ClC‑Kb channel. Medullary thick ascending limb (mTAL) tubules were isolated from the rat kidney, and primary cultures of mTAL cells from the mTAL tubules were established. The cells were treated with adenosine and the mRNA expression of CLCNKB was detected by reverse transcription‑quantitative polymerase chain reaction. The cells were also treated with pathways inhibitors (H8 and AACOCF3), and the protein expression of cyclic adenosine 3',5'‑monophosphate (cAMP)‑protein kinase A (PKA) and phospholipase A2 (PLA2) by were analyzed by western blotting. The findings indicated that adenosine increased the mRNA expression of CLCNKB in primary cultures of medullary TAL cells, and this stimulatory effect was regulated by the cAMP‑PKA and PLA2‑arachidonic acid (AA) pathways. The present study showed that adenosine affected the mRNA expression of CLCNKB, initially through the cAMP‑PKA pathway and then the PLA2‑AA pathway.
authors.affiliation: Department of Pharmacology, Harbin Medical University, Harbin, Heilongjiang 150081, P.R. China.
authors.forename: Haiyan
authors.initials: H
authors.lastname: Luan
authors.affiliation: Department of Pharmacology, Harbin Medical University, Harbin, Heilongjiang 150081, P.R. China.
authors.forename: Peng
authors.initials: P
authors.lastname: Wu
authors.affiliation: Department of Pharmacology, Harbin Medical University, Harbin, Heilongjiang 150081, P.R. China.
authors.forename: Mingxiao
authors.initials: M
authors.lastname: Wang
authors.affiliation: Department of Physiology, Basic Medical School, Jiamusi University, Jiamusi, Heilongjiang 154007, P.R. China.
authors.forename: Hongyu
authors.initials: H
authors.lastname: Sui
authors.affiliation: Department of Pharmacology, Harbin Medical University, Harbin, Heilongjiang 150081, P.R. China.
authors.forename: Lili
authors.initials: L
authors.lastname: Fan
authors.affiliation: Department of Pharmacology, Harbin Medical University, Harbin, Heilongjiang 150081, P.R. China.
authors.forename: Ruimin
authors.initials: R
authors.lastname: Gu
mesh_terms: D000241:Adenosine / Q000008:administration & dosage* / Q000378:metabolism; D000818:Animals; D027321:Anion Transport Proteins / Q000096:biosynthesis* / Q000235:genetics; D016718:Arachidonic Acid / Q000378:metabolism; D001095:Arachidonic Acids / Q000008:administration & dosage; D018118:Chloride Channels / Q000096:biosynthesis* / Q000235:genetics; D000242:Cyclic AMP / Q000378:metabolism; D017868:Cyclic AMP-Dependent Protein Kinases / Q000037:antagonists & inhibitors / Q000096:biosynthesis / Q000235:genetics; D005786:Gene Expression Regulation / Q000187:drug effects; D007546:Isoquinolines / Q000008:administration & dosage; D007687:Kidney Tubules, Proximal / Q000187:drug effects / Q000378:metabolism*; D008138:Loop of Henle / Q000187:drug effects / Q000378:metabolism*; D009399:Nephrons / Q000187:drug effects / Q000378:metabolism; D054467:Phospholipases A2 / Q000096:biosynthesis / Q000235:genetics; D061251:Primary Cell Culture; D012333:RNA, Messenger / Q000096:biosynthesis; D051381:Rats; D015398:Signal Transduction / Q000187:drug effects
chemical_list: D027321:Anion Transport Proteins; D001095:Arachidonic Acids; D018118:Chloride Channels; C486572:Clcnkb protein, rat; D007546:Isoquinolines; D012333:RNA, Messenger; C081565:arachidonyltrifluoromethane; D016718:Arachidonic Acid; C053177:N-(2-(methylamino)ethyl)-5-isoquinolinesulfonamide; D000242:Cyclic AMP; D017868:Cyclic AMP-Dependent Protein Kinases; D054467:Phospholipases A2; D000241:Adenosine