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Exploring m6A and m5C Epitranscriptomes upon Viral Infection: an Example with HIV

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Transcriptome changes in Mycoplasma hyopneumoniae during infection.

Melissa L Madsen¹, Supraja Puttamreddy, Eileen L Thacker

¹Department of Veterinary Microbiology and Preventive Medicine, Iowa State University, Ames, IA 50011, USA.

Infection and Immunity

|December 12, 2007

Summary

This study used microarrays to analyze gene expression in Mycoplasma hyopneumoniae during swine lung infection. Researchers identified 79 differentially expressed genes, offering insights into the pathogen's virulence factors and disease mechanisms.

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Published on: March 5, 2022

Area of Science:

Microbiology
Animal Science
Genomics

Background:

Mycoplasma hyopneumoniae is a key pathogen in swine respiratory disease.
Understanding its virulence mechanisms is crucial but hindered by a lack of genetic tools.
Microarray analysis offers a viable method to study transcriptional changes during infection.

Purpose of the Study:

To identify virulence-related genes of Mycoplasma hyopneumoniae by analyzing transcriptional changes during host infection.
To compare gene expression profiles of mycoplasmas in vivo (lung infection) versus in vitro (broth culture).

Main Methods:

Mycoplasma samples were collected from bronchoalveolar lavage fluid of infected pigs.
Microarray analysis was performed on RNA extracted from mycoplasmas isolated from infected lungs and compared to broth-grown cultures.
Differential gene expression was analyzed using specific primers, with nine biological replicates.

Main Results:

A total of 79 Mycoplasma hyopneumoniae genes were found to be differentially expressed (P < 0.01) during lung infection.
61% of down-regulated and 63% of up-regulated genes lacked assigned functions, highlighting novel virulence factors.
Specific genes involved in cell surface components (lipoproteins), glycerol transport (potA, ugpA), and essential cellular processes (secA, fusA, rpoC, adk, proS, cysS) showed significant differential expression.

Conclusions:

Microarray analysis successfully identified differentially expressed genes in Mycoplasma hyopneumoniae during swine pneumonia.
The findings provide a foundation for understanding pathogen-host interactions and identifying novel virulence factors.
This transcriptomic data aids in developing strategies to combat swine respiratory disease complex.