In infectious disease research, understanding how pathogens interact with their hosts is critical for uncovering disease mechanisms, immune responses, and potential therapeutic targets. During infection, pathogens dynamically regulate virulence genes to survive and evade host defenses, while the host activates complex immune signaling pathways in response.
Traditional RNA sequencing approaches typically focus on either the host or the pathogen alone, often requiring physical separation before sequencing. However, this process can lead to loss of important interaction information.
Today, Pathogen/Microbial Transcriptomics, especially Dual RNA-seq, enables simultaneous profiling of both host and pathogen transcriptomes from the same sample, providing a comprehensive view of infection biology.
Why Dual RNA-seq Matters
In infected tissues, host RNA usually dominates the sample, often accounting for more than 99% of total RNA, while pathogen RNA remains extremely low in abundance. This creates a major technical challenge for pathogen transcriptome analysis.
Dual RNA-seq overcomes this limitation by combining:
- Efficient rRNA depletion
- Strand-specific RNA library preparation
- Sensitive transcript detection
This approach allows researchers to simultaneously analyze:
- Host immune responses
- Pathogen virulence mechanisms
- Host–microbe interaction networks
- Dynamic transcriptional changes during infection
Dual RNA-Seq Workflow Overview
Core Challenge: Removing rRNA Efficiently
The success of Dual RNA-seq largely depends on one critical step: rRNA depletion
Because ribosomal RNA accounts for the vast majority of total RNA, efficient depletion is essential to enrich biologically meaningful mRNA.
Different host-pathogen combinations require different enrichment strategies.
Figure 1. Workflow of Dual RNA-Seq Library Preparation
The success of Dual RNA-seq largely depends on one critical step-rRNA depletion. Because ribosomal RNA accounts for the vast majority of total RNA, efficient depletion is essential to enrich biologically meaningful mRNA.
Researchers frequently encounter several technical bottlenecks:
- Excessive host RNA background
- Low pathogen RNA abundance
- Incomplete rRNA removal
- Poor mapping rates
- Loss of strand specificity
Therefore, efficient rRNA depletion and high-quality library preparation kits are essential for successful pathogen transcriptome studies.
Yeasen Solutions for Pathogen/Microbial Transcriptomics
To support complex host–pathogen interaction studies, Yeasen provides optimized solutions covering RNA extraction, rRNA depletion, and strand-specific RNA library preparation.
|
Experimental Step |
Recommended Product |
Cat. No. |
|
Pathogen DNA/RNA Extraction |
Hieff™ Magnetic Pathogen DNA/RNA Kit |
18306ES |
|
gDNA Removal |
14549ES |
|
|
Human rRNA Depletion |
Hieff NGS™ MaxUp Human/Mouse/Rat rRNA Depletion Kit(rRNA ITS/ETS) |
12257ES |
|
Hieff NGS™ MaxUp Human/Mouse/Rat rRNA Depletion Kit(rRNA ITS/ETS) 2.0 |
12726ES |
|
|
12258ES |
||
|
Mammalian rRNA Depletion |
Mammalian Universal Ribosomal RNA Depletion Kit |
12266ES |
|
Microbial rRNA Depletion |
Prokaryotic Microbial Ribosomal RNA Depletion Kit |
12264ES |
|
RNA Library Prep |
Hieff NGS™ EvoMax RNA Library Prep Kit (dUTP, Strand-specific) |
12340ES |
|
12308ES |
||
|
13488ES |
||
|
12316ES |
Figure 2. Library yield and sequencing data quality comparison across different workflow
Various workflows combining Hieff NGS™ ds-cDNA Synthesis Kit(Cat#13488) or Hieff NGS™ C37P3 ds-cDNA Synthesis Kit (gDNA digester plus, Cat#13501), combined with optional Hieff NGS™ One-Step rRNA Removal Kit (Cat#12258) and Hieff NGS™ OnePot Flash DNA Library Prep Kit(Cat#12316). Although rRNA depletion and gDNA removal affected library yield and the proportion of DNA/RNA reads, all workflows generated >1 μg library yield with overall mapping rates exceeding 99%. After rRNA depletion, residual rRNA content was reduced to below 3%, demonstrating efficient rRNA removal performance.
Applications
Pathogen/microbial transcriptomics has become an essential tool in:
- Infectious disease research
- Host immune response analysis
- Microbiome studies
- Antimicrobial drug discovery
- Viral and bacterial pathogenesis studies
By enabling simultaneous analysis of both sides of infection, Dual RNA-seq provides deeper insight into the molecular mechanisms underlying host–pathogen interactions.
Yeasen’s integrated solutions help simplify these workflows and support reliable, high-sensitivity transcriptome analysis for modern infection biology research.