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10:44
Single Cell Multiplex Reverse Transcription Polymerase Chain Reaction After Patch-clamp
Published on: June 20, 2018
Multiple polymorphisms affect expression and function of the neuropeptide S receptor (NPSR1).
Francesca Anedda1, Marco Zucchelli, Danika Schepis
1Department of Biosciences and Nutrition, Karolinska Institutet, Stockholm, Sweden.
Plos One
|January 5, 2012
Summary
We identified specific genetic variations in the NPSR1 gene that impact its function and are linked to various diseases. These findings offer insights into NPSR1
Area of Science:
- Genetics and Molecular Biology
- Neuroscience
- Immunology
Background:
- The neuropeptide S (NPS) and its receptor NPSR1 pathway influences anxiety, fear, pain, and inflammation.
- NPSR1 genetic variations are associated with asthma, inflammatory bowel disease (IBD), rheumatoid arthritis, and panic disorders.
- Identifying causative NPSR1 variations and their functional effects is crucial for understanding disease predisposition.
Purpose of the Study:
- To functionally characterize common NPSR1 promoter and coding single nucleotide polymorphisms (SNPs) in Caucasians.
- To investigate the impact of these SNPs on NPSR1 expression and function.
- To explore the association of NPSR1 SNP combinations with inflammatory bowel disease (IBD) risk.
Main Methods:
- Gene reporter assays to assess promoter activity.
- Quantitative analysis of NPSR1 mRNA levels in human leukocytes.
- Genome-wide transcriptional profiling and CRE-luciferase assays for coding SNPs.
- Molecular modeling, bioinformatics, and a pilot case-control study for IBD.
Main Results:
- One promoter SNP (rs2530547) significantly altered NPSR1 expression.
- Three non-synonymous SNPs (rs324981, rs34705969, rs727162) showed quantitative differences in NPS-induced transcriptional profiles.
- A coding variant (197Phe) demonstrated a loss-of-function phenotype.
- Initial evidence suggests cis-combinations of functional SNPs may influence IBD risk.
Conclusions:
- These findings provide a foundational understanding of NPSR1 locus complexity and its role in human diseases.
- The identified functional SNPs have potential pharmacogenetic relevance for conditions influenced by the NPS-NPSR1 pathway.
- Further research into NPSR1 variations can elucidate disease mechanisms and inform therapeutic strategies.
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