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MicroRNA (miRNA) are short, regulatory RNA transcribed from introns—non-coding regions of a gene—or intergenic regions—stretches of DNA present between genes. Several processing steps are required to form biologically active, mature miRNA. The initial transcript, called primary miRNA (pri-mRNA), base-pairs with itself forming a stem-loop structure. Within the nucleus, an endonuclease enzyme, called Drosha, shortens the stem-loop structure into hairpin-shaped pre-miRNA. After...
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Genetic variations significantly influence drug response through pharmacokinetics, receptor interactions, and biologic milieu modifications. Pharmacokinetic alterations impact drug metabolism and clearance, affecting efficacy and toxicity. Variants in drug-metabolizing enzymes, such as CYP2C9 and CYP2C19, alter drug activation and elimination. For example, CYP2C9 loss-of-function variants require lower warfarin doses to prevent excessive bleeding, while CYP2C19 variants reduce clopidogrel...
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Polymorphisms in miRNA processing genes and their role in osteosarcoma risk.

Nerea Bilbao-Aldaiturriaga1, Angela Gutierrez-Camino, Idoia Martin-Guerrero

  • 1Department of Genetics, Physical Anthropology and Animal Physiology, Faculty of Medicine and Odontology, University of the Basque Country (UPV/EHU), Leioa, Spain.

Pediatric Blood & Cancer
|February 10, 2015
PubMed
Summary

Genetic variants in microRNA (miRNA) processing genes, particularly those in the RISC complex, may influence osteosarcoma risk. The single nucleotide polymorphism rs11866002 in CNOT1 shows a notable association with susceptibility.

Keywords:
genetic susceptibilitymicroRNA processing pathwayosteosarcoma

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Area of Science:

  • Genetics
  • Oncology
  • Molecular Biology

Background:

  • Previous studies on genetic variants and osteosarcoma risk yielded inconclusive results, focusing on traditional pathways.
  • The microRNA (miRNA) processing pathway is increasingly recognized for its role in cancer development.
  • Dysregulation of miRNA processing genes is linked to various cancers, suggesting their potential involvement in osteosarcoma.

Purpose of the Study:

  • To investigate the association between single nucleotide polymorphisms (SNPs) in miRNA processing genes and osteosarcoma susceptibility.
  • To determine if genetic variations in the miRNA pathway contribute to an individual's predisposition to developing osteosarcoma.

Main Methods:

  • Analysis of 72 SNPs across 21 miRNA processing genes.
  • Study population comprised 99 osteosarcoma patients and 387 healthy controls.
  • Statistical analysis to identify significant associations between SNPs and osteosarcoma risk.

Main Results:

  • Three SNPs in miRNA processing genes (CNOT1, CNOT4, SND1) were associated with osteosarcoma susceptibility.
  • These identified SNPs are components of the RNA-induced silencing complex (RISC).
  • The SNP rs11866002 in the CNOT1 gene showed a near-significant association after Bonferroni correction.

Conclusions:

  • SNPs within genes encoding RISC complex proteins may play a role in osteosarcoma susceptibility.
  • The specific SNP rs11866002 in CNOT1 warrants further investigation for its contribution to osteosarcoma risk.