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Related Concept Videos

DNA Microarrays02:34

DNA Microarrays

Microarrays are high-throughput and relatively inexpensive assays that can be automated to analyze large quantities of data at a time. They are used in genome-wide studies to compare gene or protein expression under two varied conditions, such as healthy and diseased states. Microarrays consist of glass or silica slides on which probe molecules are covalently attached through surface functionalization. Most commonly, the slides are prepared through the chemisorption of silanes to silica...
Hypoxia01:23

Hypoxia

Hypoxia is a medical condition characterized by an inadequate oxygen supply to body tissues. It typically manifests as a bluish discoloration of the skin and mucosae, especially in fair-skinned individuals, when hemoglobin (Hb) saturation drops below 75%.
Types of Hypoxia
There are four primary types of hypoxia, each resulting from a different cause:
1. Anemic hypoxia: This type occurs due to insufficient oxygen delivery caused by a lack of red blood cells (RBCs) or RBCs with abnormal or...

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Measuring mRNA Levels Over Time During the Yeast S. cerevisiae Hypoxic Response
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Identification of condition-specific reference genes from microarray data for locusts exposed to hypobaric hypoxia.

De-Jian Zhao1, Kun Guo, Le Kang

  • 1State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing, China.

FEBS Open Bio
|May 8, 2013
PubMed
Summary

Finding stable reference genes for gene expression analysis is vital. This study identified acetyl-CoA hydrolase (Ach) as a reliable reference gene for locusts under hypobaric hypoxia, improving gene expression quantification accuracy.

Keywords:
Hypobaric hypoxiaLocusta migratoriaMicroarrayReal-time quantitative PCRReference gene

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Area of Science:

  • Molecular Biology
  • Genomics
  • Physiology

Background:

  • Real-time quantitative polymerase chain reaction (qPCR) is essential for gene expression analysis.
  • Accurate gene expression quantification relies on stable reference genes.
  • Hypobaric hypoxia can affect the expression of commonly used housekeeping genes.

Purpose of the Study:

  • To identify and validate stable reference genes for studying locust muscle transcriptional responses to hypobaric hypoxia.
  • To evaluate the expression stability of classical housekeeping genes and novel candidates under hypobaric hypoxia.
  • To confirm the suitability of identified reference genes for accurate gene expression analysis.

Main Methods:

  • Expression stability analysis of 18S, GAPDH, and β-actin genes under hypobaric hypoxia.
  • Identification of novel candidate reference genes from locust microarray data.
  • Evaluation of gene expression stability using geNorm and NormFinder algorithms.
  • Validation of the most stable reference gene (Ach) against a traditional housekeeping gene (18S).

Main Results:

  • Classical housekeeping genes (18S, GAPDH, β-actin) showed unstable expression under hypobaric hypoxia.
  • Acetyl-CoA hydrolase (Ach) and phosphoglycolate phosphatase-like (Pgp) were identified as the most stable genes by geNorm.
  • NormFinder further confirmed Ach as the most stable reference gene.
  • Ach demonstrated reliable performance as a reference gene for gene expression studies in locusts under hypobaric hypoxia.

Conclusions:

  • Standard housekeeping genes are not always suitable as reference genes under specific experimental conditions like hypobaric hypoxia.
  • Acetyl-CoA hydrolase (Ach) is a validated and reliable reference gene for locusts experiencing hypobaric hypoxia.
  • Condition-specific reference gene validation is crucial for accurate gene expression studies, and large-scale data can aid in identifying suitable candidates.