Role of 5-HT2 receptors family in the allergy-induced increased aorta contractile responses to 5-HT
Jazyk angličtina Země Česko Médium print-electronic
Typ dokumentu časopisecké články
PubMed
36545875
PubMed Central
PMC10069811
DOI
10.33549/physiolres.934968
PII: 934968
Knihovny.cz E-zdroje
- MeSH
- aorta MeSH
- bronchiální astma * MeSH
- morčata MeSH
- receptory serotoninové 5-HT2 MeSH
- receptory serotoninové metabolismus MeSH
- serotonin * MeSH
- zvířata MeSH
- Check Tag
- morčata MeSH
- zvířata MeSH
- Publikační typ
- časopisecké články MeSH
- Názvy látek
- receptory serotoninové 5-HT2 MeSH
- receptory serotoninové MeSH
- serotonin * MeSH
Asthma poses an increased risk for cardiovascular disorders, suggesting that allergy, which is an underlying process in asthma, causes atypical functioning of organs other than lungs. In a previous study in a guinea pig asthma model, we concluded that allergic sensitization increased aorta contractile responses to 5-HT. To further characterize these responses, here we explored the role of the 5-HT2 receptors family. We found that TCB-2 (5-HT2A agonist) and WAY161503 (5-HT2C agonist) induced aorta contractions resembling those elicited by 5-HT but less intense (~43 % and ~25 %, respectively). In these experiments, aortas from sensitized guinea pigs showed increased contractions to TCB-2, but not to WAY161503. In turn, MDL 100907 (5-HT2A antagonist) and RS-102221 (5-HT2C antagonist) caused a notably and a mild reduction of the 5-HT-induced contractions, respectively, with no differences seen between sensitized and non-sensitized tissues. BW723C86 (5-HT2B agonist) did not induce contractile responses and RS-127445 (5-HT2B antagonist) did not modify the contractile responses to 5-HT. In non-sensitized aortas, the pattern of protein expression of receptors was 5HT2B>5-HT2A=5-HT2C, which did not change in sensitized animals. In conclusion, we found that allergic sensitization increased the aorta contractile responses to 5-HT, partly mediated by enhanced responses of 5-HT2A receptors, which was unrelated to changes in the expression of these receptors.
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