Quantitative mRNA Analysis of Eight Bovine 5‐HT Receptor Subtypes in Brain, Abomasum, and Intestine by Real‐Time RT‐PCR
| Autor: | Martin Reist, Adrian Steiner, Gabriela Hirsbrunner, Mireille Meylan, Jürg W. Blum, C. Morel, Michael W. Pfaffl |
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| Rok vydání: | 2003 |
| Předmět: |
DNA
Complementary Biology Serotonergic Biochemistry Abomasum In vivo Animals Humans RNA Messenger Intestinal Mucosa Receptor Molecular Biology DNA Primers Messenger RNA Reverse Transcriptase Polymerase Chain Reaction Brain Cell Biology Models Theoretical Molecular biology In vitro Real-time polymerase chain reaction Receptors Serotonin RNA Cattle Primer (molecular biology) |
| Zdroj: | Journal of Receptors and Signal Transduction. 23:271-287 |
| ISSN: | 1532-4281 1079-9893 |
| Popis: | Serotoninergic pathways are involved in economically important bovine gastrointestinal (GI) motility disorders such as displaced abomasum and cecal dilatation/dislocation. The existing research tools to investigate the role of serotoninergic pathways in such disorders in ruminants comprise functional pharmacological methods, e.g., in vitro contractility studies in tissue baths, and electromyographical recordings in vivo. However, no tools for quantification of bovine serotonin receptor [5-hydroxytryptamine receptor (5-HTR)] expression were available so far. This study aimed to develop real-time RT-PCR assays for quantitative mRNA analysis of bovine 5-HTR subtypes. Because the bovine 5-HTR coding sequences (CDSs) were completely unknown, multiple species (human, mouse, and rat) alignment of complete CDS was used for primer design in highly homologous regions. LightCycler real-time RT-PCR assays (partial CDS) for the following bovine 5-HTR subtypes were developed and validated: 5-HTR1A, 5-HTR1B, 5-HTR1D, 5-HTR1F, 5-HTR2A, 5-HTR2B, 5-HTR2C, and 5-HTR4. Intra- and inter-assay coefficients of variation (CV) for the eight established assays were small, ranging from 0.49% to 2.46%. As a first physiological application, 5-HTR mRNA expression levels were measured in brain, abomasum, and intestine of 10 healthy, lactating dairy cows. The 5-HTR expression was quantified by normalization to the housekeeping gene glyceraldehyde-phosphate-dehydrogenase (GAPDH). The 5-HTR subtype expression levels ranged from 0.001% (5-HTR2C in intestine) to 1% 5-HTR/GAPDH (5-HTR1B and 5-HTR4 in intestine). There were high variations of 5-HTR subtype mRNA expression within tissues across receptor subtypes and within receptor subtypes across tissues. In conclusion, accurate real-time RT-PCR assays for quantitative analysis of bovine 5-HTR subtype gene expression were developed and validated. |
| Databáze: | OpenAIRE |
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