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A single nucleotide polymorphism or SNP is a single nucleotide variation at a specific genomic position in a large population. It is the most prevalent type of sequence variation found in the human genome. Point mutations that occur in more than 1% of the population qualify as SNPs. These are present once every 1000 nucleotides on an average in the human genome. Replacement of a purine with another purine (A/G) or a pyrimidine with another pyrimidine (C/T) is known as a transition. In contrast,...
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[Schizophrenia-associated single nucleotide polymorphisms affecting microRNA function].

Wen Quan Liang1, Yu Hou2, Cun You Zhao1

  • 1Department of Medical Genetics, School of Basic Medical Sciences, Southern Medical University, Guangzhou 510515, China.

Yi Chuan = Hereditas
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MicroRNAs (miRNAs) are crucial for neuron development and gene regulation. This review explores how genetic variations, identified by genome-wide association studies (GWAS), impact miRNA function and contribute to schizophrenia.

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Area of Science:

  • Neuroscience
  • Genetics
  • Molecular Biology

Background:

  • MicroRNAs (miRNAs) are small non-coding RNA molecules that regulate gene expression.
  • Schizophrenia is a complex psychiatric disorder with a significant genetic component.
  • Genome-wide association studies (GWAS) have identified numerous schizophrenia-associated single nucleotide polymorphisms (SNPs), many in non-coding regions.

Purpose of the Study:

  • To review the interplay between GWAS-identified SNPs and miRNAs in schizophrenia.
  • To explore four specific mechanisms of interaction: SNP in miRNA gene, miRNA in host gene, SNP in miRNA seed sequence, and SNP in miRNA binding site.
  • To discuss future research directions for understanding miRNA's role in schizophrenia.

Main Methods:

  • Literature review and synthesis of existing research on miRNAs, GWAS, and schizophrenia.
  • Analysis of genetic variations (SNPs) and their potential functional impact on miRNA biogenesis and function.
  • Categorization of SNP-miRNA interactions into four distinct perspectives.

Main Results:

  • Most schizophrenia-associated SNPs are found in non-coding regions, suggesting a role for regulatory elements like miRNAs.
  • Interactions between GWAS-SNPs and miRNAs can occur within miRNA genes, host genes, miRNA seed regions, or miRNA binding sites.
  • These interactions can alter miRNA expression or function, potentially contributing to schizophrenia pathogenesis.

Conclusions:

  • Genetic variations influencing miRNA function are implicated in schizophrenia development.
  • Understanding these SNP-miRNA interactions provides insights into the molecular mechanisms underlying schizophrenia.
  • Further research is warranted to elucidate the precise roles of specific miRNAs and their genetic variants in schizophrenia.