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Related Concept Videos

RACE - Rapid Amplification of cDNA Ends02:35

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Rapid Amplification of cDNA Ends, or RACE, is one of the most effective methods to obtain a full-length cDNA from an mRNA sequence between a known internal region to the unknown sequence at the 5’ or 3’ end. The unknown region is cloned in the cDNA by a gene-specific primer that binds the known end, and a hybrid primer that attaches a predefined anchor sequence to the unknown end of the cDNA. The sequence in between is amplified by PCR with an anchor primer and a gene-specific...
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Constructing and detecting a cDNA library for mites.

Li Hu1, YaE Zhao, Juan Cheng

  • 1Department of Pathogen Biology and Immunology, Xi'an Jiaotong University Health Science Center, No.76 Yanta West Road, Xi'an, 710061, China.

Parasitology Research
|July 16, 2015
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Summary
This summary is machine-generated.

This study presents an improved method for creating complementary DNA (cDNA) libraries from mites, overcoming challenges with hard exoskeletons. The reliable mite cDNA library supports future transcriptome and molecular pathogenesis research.

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Area of Science:

  • Molecular Biology
  • Parasitology
  • Bioinformatics

Background:

  • RNA extraction and complementary DNA (cDNA) library construction in mites are challenging due to their small size and tough chitinous exoskeletons.
  • Existing methods often face difficulties in sample acquisition and efficient lysis, hindering molecular research.

Purpose of the Study:

  • To develop and validate an optimized method for constructing a high-quality full-length cDNA library from the mite Psoroptes cuniculi.
  • To lay the groundwork for advanced transcriptome and molecular pathogenesis studies in mites.

Main Methods:

  • Total RNA was extracted using a combination of liquid nitrogen grinding and TRIzol reagent.
  • Full-length cDNA was synthesized and cloned using the Switching Mechanism at the 5' end of the RNA Transcript (SMART) technique.
  • Library quality was assessed by calculating titer and recombination rate, followed by sequencing and PCR verification of positive clones and target genes.

Main Results:

  • The developed method yielded high RNA concentration (836 ng/μl) and an optimal A260/280 ratio of 1.82.
  • The resulting cDNA library exhibited a high titer (5.31 × 10^5 PFU/ml) and a recombination rate of 98.21%.
  • Sequencing of expressed sequence tags (ESTs) and specific gene amplification confirmed high identity (99.63% and 98.56%) with Psoroptes ovis, validating library reliability and feasibility.

Conclusions:

  • The combined approach of liquid nitrogen grinding, TRIzol extraction, and SMART technique provides a reliable and feasible method for constructing high-quality mite cDNA libraries.
  • This optimized protocol is crucial for advancing research in mite transcriptomics and understanding molecular mechanisms of pathogenesis.