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Related Concept Videos

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Real-time reverse transcription-polymerase chain reaction, or Real-time RT-PCR, is an analytical tool used to determine the expression level of target genes. The method involves converting mRNA to complementary DNA with the help of an enzyme known as reverse transcriptase, followed by the PCR amplification of the cDNA. These two processes can be performed simultaneously in a single tube or separately as a two-step reaction.
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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 the pre-miRNA...
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Probe-based Real-time PCR Approaches for Quantitative Measurement of microRNAs
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qPCR-based methods for expression analysis of miRNAs.

Diego A Forero1,2, Yeimy González-Giraldo3, Luis J Castro-Vega4,5

  • 1Laboratory of NeuroPsychiatric Genetics, Biomedical Sciences Research Group, School of Medicine, Universidad Antonio Nariño, Bogotá, Colombia.

Biotechniques
|September 28, 2019
PubMed
Summary
This summary is machine-generated.

This review covers quantitative real-time PCR (qPCR) methods for microRNA (miRNA) expression analysis, detailing their pros and cons. It highlights current techniques and suggests improvements for future miRNA research.

Keywords:
expression analysismicroRNAsmolecular assaysnon-coding RNAsreal-time PCR

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Area of Science:

  • Molecular Biology
  • Genetics
  • Biochemistry

Background:

  • MicroRNA (miRNA) expression analysis is crucial for understanding gene regulation.
  • Various quantitative real-time PCR (qPCR) based methods have emerged for miRNA profiling.
  • A comprehensive review of these methods is needed to guide researchers.

Purpose of the Study:

  • To provide an updated and comprehensive review of available qPCR-based methods for miRNA expression analysis.
  • To discuss the advantages and disadvantages of existing miRNA detection techniques.
  • To identify areas for improvement and future development in miRNA research.

Main Methods:

  • Review of existing literature on qPCR-based miRNA expression analysis.
  • Detailed description of techniques including stem-loop RT-PCR, polyadenylation, adapter ligation, and primer/probe strategies.
  • Comparison of methods focusing on mature, pre-miRNA, and pri-miRNA analysis.

Main Results:

  • Multiple qPCR approaches exist, utilizing diverse strategies like stem-loop RT, polyadenylation, and specific primers.
  • Most current methods focus on mature miRNA detection, with fewer options for pre-miRNA and pri-miRNA studies.
  • Comparative studies reveal variations in results between different miRNA detection methods.

Conclusions:

  • Existing qPCR methods for miRNA analysis offer various strengths and weaknesses.
  • Further development is needed to enhance techniques for studying all miRNA forms (mature, pre-, pri-).
  • Standardization and improvement of qPCR protocols will advance miRNA research accuracy and scope.