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Modern Molecular Taxonomy01:29

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Advancements in molecular biology have revolutionized the identification and characterization of bacteria, with multiple methods leveraging DNA sequencing for enhanced precision. As sequencing technologies improve and costs decline, these approaches are increasingly used in clinical, environmental, and evolutionary studies.Multilocus Sequence Typing (MLST) examines several housekeeping genes, essential chromosomal genes encoding cellular functions, to distinguish strains. Approximately...
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Genomics is the science of genomes: it is the study of all the genetic material of an organism. In humans, the genome consists of information carried in 23 pairs of chromosomes in the nucleus, as well as mitochondrial DNA. In genomics, both coding and non-coding DNA is sequenced and analyzed. Genomics allows a better understanding of all living things, their evolution, and their diversity. It has a myriad of uses: for example, to build phylogenetic trees, to improve productivity and...
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Related Experiment Video

Updated: Jul 25, 2025

Microbiota Analysis Using Two-step PCR and Next-generation 16S rRNA Gene Sequencing
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Current concepts, advances, and challenges in deciphering the human microbiota with metatranscriptomics.

Teija Ojala1, Aino-Elina Häkkinen2, Esko Kankuri1

  • 1Department of Pharmacology, Faculty of Medicine, University of Helsinki, Helsinki, Finland.

Trends in Genetics : TIG
|June 26, 2023
PubMed
Summary

Metatranscriptomics analyzes microbial gene activity in samples. This review covers methods for studying human-associated microbes, revealing insights into health, disease, and antimicrobial strategies.

Keywords:
RNA-sequencingfunctional and taxonomic annotationhuman microbiotametatranscriptomemetatranscriptomicssample preparation

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Area of Science:

  • Microbiology
  • Genomics
  • Bioinformatics

Background:

  • Metatranscriptomics analyzes the collective microbial transcriptome.
  • Its application in human-associated microbial communities reveals disease-related activities.
  • Understanding microbial activity is crucial for human health research.

Purpose of the Study:

  • To review metatranscriptomics principles for human-associated microbial samples.
  • To discuss strengths and weaknesses of sample preparation, sequencing, and bioinformatics.
  • To summarize strategies and future directions in the field.

Main Methods:

  • Review of existing literature on metatranscriptomics.
  • Analysis of sample preparation, sequencing technologies, and bioinformatics pipelines.
  • Synthesis of current research on human-associated microbial communities.

Main Results:

  • Metatranscriptomics provides insights into microbial activities in human health and disease.
  • Identified strengths and weaknesses of various methodological approaches.
  • Highlighted recent advancements and potential future applications.

Conclusions:

  • Metatranscriptomics significantly expands knowledge of human microbiotas.
  • Offers potential for rational antimicrobial drug use and improved disease management.
  • The field is evolving, promising deeper understanding of host-microbe interactions.