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ACh action is terminated by hydrolysis by the cholinesterases (ChEs), acetylcholinesterase, and butyrylcholinesterase. Both ChEs exist in multiple molecular variants either soluble or anchored by specific anchoring proteins like collagen Q (ColQ) anchoring protein and proline-rich membrane anchoring protein (PRiMA). Here we assessed the expression of specific ChE molecular forms in different heart compartments using RT-qPCR. We show that both ChEs are expressed in all heart compartments but display different expression patterns. The acetylcholinesterase-T variant together with PRiMA and ColQ is predominantly expressed in rat atria. Butylcholinesterase is found in all heart compartments and is accompanied by both PRiMA and ColQ anchors. Its expression in the ventricular system suggests involvement in the nonneuronal cholinergic system. Additionally, two PRiMA variants are detected throughout the rat heart. <\/jats:p>","DOI":"10.1139\/cjpp-2019-0565","type":"journal-article","created":{"date-parts":[[2020,2,4]],"date-time":"2020-02-04T16:32:43Z","timestamp":1580833963000},"page":"473-476","update-policy":"https:\/\/doi.org\/10.1139\/csp-crossmark-policy","source":"Crossref","is-referenced-by-count":11,"title":["Expression of cholinesterases and their anchoring proteins in rat heart"],"prefix":"10.1139","volume":"98","author":[{"given":"Zuzana","family":"Kilianova","sequence":"first","affiliation":[{"name":"Department of Pharmacology and Toxicology, Faculty of Pharmacy, Comenius University in Bratislava, Bratislava, Slovak Republic."}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Natalia","family":"Ciznarova","sequence":"additional","affiliation":[{"name":"Department of Pharmacology and Toxicology, Faculty of Pharmacy, Comenius University in Bratislava, Bratislava, Slovak 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