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Related Concept Videos

Bacterial Phylum Chlamydiae01:29

Bacterial Phylum Chlamydiae

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The phylum Chlamydiae or Chlamydiota is composed of a single order, Chlamydiales. This phylum consists entirely of obligate intracellular parasites that infect eukaryotic hosts. While human pathogens within this group have been studied extensively, the phylum encompasses many species capable of interacting with various eukaryotic organisms. Members of Chlamydiae are typically small cocci, approximately 0.5 μm in diameter, and exhibit a distinctive developmental cycle. As is characteristic...
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Sexually transmitted infections (STIs) are diseases transmitted primarily through unsafe sexual interactions. Bacteria, viruses, or parasites cause them and can result in severe health complications if untreated.ChlamydiaThe bacterium Chlamydia trachomatis is responsible for the disease Chlamydia, the most common STI in the United States. This peculiar pathogen requires human cells to reproduce, residing intracellularly. The initial infection often goes unnoticed because it typically does not...
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Related Experiment Video

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MiR-378b Modulates Chlamydia-Induced Upper Genital Tract Pathology.

Stephanie R Lundy1, Kobe Abney1,2, Debra Ellerson3

  • 1Department of Microbiology, Biochemistry & Immunology, Morehouse School of Medicine, Atlanta, GA 30310, USA.

Pathogens (Basel, Switzerland)
|June 2, 2021
PubMed
Summary
This summary is machine-generated.

MicroRNA-378b regulates immune responses to Chlamydia trachomatis infection. While its absence impairs infection clearance, it surprisingly protects against Chlamydia-induced infertility and reproductive pathologies.

Keywords:
Chlamydia muridarumChlamydial pathogenesisinfertilitymiR-378b−/− mice

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Area of Science:

  • Reproductive immunology
  • Infectious disease pathology
  • Molecular biology

Background:

  • Genital Chlamydia trachomatis infection leads to severe reproductive issues like infertility.
  • MicroRNAs (miRNAs) are key regulators in host responses to infections, including Chlamydia.
  • miR-378b is differentially expressed during Chlamydia infection and reinfection.

Purpose of the Study:

  • To investigate the role of miR-378b in the pathological outcomes of Chlamydia infection.
  • To determine if miR-378b influences Chlamydia infectivity, replication, and associated reproductive pathologies.

Main Methods:

  • Generation of miR-378b knockout mice (miR-378b-/-) using CRISPR/Cas9.
  • Infection of miR-378b-/- and wild-type (WT) mice with Chlamydia trachomatis.
  • Comparison of Chlamydia burden, reproductive pathologies, and fertility rates between knockout and WT groups.

Main Results:

  • miR-378b-/- mice showed impaired Chlamydia clearance and higher bacterial burden compared to WT mice.
  • Despite increased Chlamydia burden, miR-378b-/- mice exhibited significantly reduced uterine lesions and dilatations.
  • Infected miR-378b-/- mice demonstrated protection from Chlamydia-induced infertility, with fertility rates comparable to uninfected WT mice.

Conclusions:

  • miR-378b plays a dual role in Chlamydia infection, regulating both pathogen control and inflammation-driven pathology.
  • Absence of miR-378b exacerbates Chlamydia replication but mitigates reproductive complications and infertility.
  • These findings suggest miR-378b as a potential biomarker for Chlamydia complications and a target for therapeutic intervention.