Pharmacological Characterization of a Tyramine Receptor from the Southern Cattle Tick, Rhipicephalus (Boophilus) microplus Kimber, Michael Gross, Aaron Temeyer, Kevin Coats, Joel Day, Timothy Pérez de León, Adalberto Kimber, Michael Coats, Joel
dc.contributor.department Biomedical Sciences
dc.contributor.department Entomology 2018-02-17T06:30:00.000 2020-06-30T02:23:11Z 2020-06-30T02:23:11Z 2015-08-01
dc.description.abstract <p>The southern cattle tick (<em>Rhipicephalus (Boophilus) microplus</em>) is a hematophagous external parasite that vectors the causative agents of bovine babesiosis or cattle tick fever, <em>Babesia bovis</em> and <em>B</em>. <em>bigemina</em>, and anaplasmosis, <em>Anaplasma marginale</em>. The southern cattle tick is a threat to the livestock industry in many locations throughout the world. Control methods include the use of chemical acaricides including amitraz, a formamidine insecticide, which is proposed to activate octopamine receptors. Previous studies have identified a putative octopamine receptor from the southern cattle tick in Australia and the Americas. Furthermore, this putative octopamine receptor could play a role in acaricide resistance to amitraz. Recently, sequence data indicated that this putative octopamine receptor is probably a type-1 tyramine receptor (TAR1). In this study, the putative TAR1 was heterologously expressed in Chinese hamster ovary (CHO-K1) cells, and the expressed receptor resulted in a 39-fold higher potency for tyramine compared to octopamine. Furthermore, the expressed receptor was strongly antagonized by yohimbine and cyproheptadine, and mildly antagonized by mianserin and phentolamine. Tolazoline and naphazoline had agonistic or modulatory activity against the expressed receptor, as did the amitraz metabolite, BTS-27271; however, this was only observed in the presence of tyramine. The southern cattle tick's tyramine receptor may serve as a target for the development of anti-parasitic compounds, in addition to being a likely target of formamidine insecticides.</p>
dc.description.comments <p>This article is from <em>Insect Biochemistry and Molecular Biology</em> 63 (2015): 47, doi:<a href="" id="x-ddDoi" target="_blank">10.1016/j.ibmb.2015.04.008</a>.</p>
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dc.identifier archive/
dc.identifier.articleid 1301
dc.identifier.contextkey 7865041
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath ent_pubs/302
dc.language.iso en
dc.source.bitstream archive/|||Fri Jan 14 23:28:22 UTC 2022
dc.source.uri 10.1016/j.ibmb.2015.04.008
dc.subject.disciplines Entomology
dc.subject.keywords Tyramine receptor
dc.subject.keywords Southern cattle tick
dc.subject.keywords G-protein-coupled receptor
dc.subject.keywords GPCR
dc.subject.keywords Tick
dc.subject.keywords Rhipicephalus microplus
dc.title Pharmacological Characterization of a Tyramine Receptor from the Southern Cattle Tick, Rhipicephalus (Boophilus) microplus
dc.type article
dc.type.genre article
dspace.entity.type Publication
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