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Related Experiment Video

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How Cryptococcus interacts with the blood-brain barrier.

Hsiang-Kuang Tseng1,2,3, Tseng-Yu Huang2, Alice Ying-Jung Wu2

  • 1Department of Medicine, MacKay Medical College, No. 46, Sec. 3, Zhongzheng Road, Sanzhi Distric, New Taipei City 25245, Taiwan.

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|October 7, 2015
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Summary
This summary is machine-generated.

The study explores how Cryptococcus invades the brain by crossing the blood-brain barrier (BBB). It identifies potential mechanisms involving endothelial cell interactions and genetic factors, offering insights into cryptococcal meningitis.

Keywords:
Cryptococcusblood–brain barrierbrain microvascular endothelial cellmicrovesicle

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Area of Science:

  • Neuroscience
  • Infectious Diseases
  • Microbiology

Background:

  • Cryptococcus invades the brain, but the mechanism of blood-brain barrier (BBB) crossing is unclear.
  • BBB crossing involves transcellular or paracellular routes across human brain microvascular endothelial cells.

Purpose of the Study:

  • To elucidate the mechanisms by which Cryptococcus crosses the BBB.
  • To identify Cryptococcal genes and pathways involved in brain invasion.

Main Methods:

  • Review of recent evidence on human brain microvascular endothelial cell responses to invasion.
  • Identification of Cryptococcal genes implicated in BBB traversal.
  • Consideration of Cryptococcus neoformans-derived microvesicles and paracellular routes.

Main Results:

  • Cryptococcus invades the brain via transcellular or paracellular routes across the BBB.
  • Transcellular invasion involves endothelial cell membrane rearrangements, signaling, and cytoskeletal changes.
  • Identified Cryptococcal genes (CPS1, ITR1a, ITR3c, PLB1, MPR1, FNX1, RUB1) and microvesicles may contribute to invasion.
  • Paracellular invasion may involve plasmin, ammonia, or macrophages (Trojan horse mechanism).

Conclusions:

  • Multiple mechanisms, including genetic factors and host cell interactions, facilitate Cryptococcus brain invasion.
  • Understanding these pathways is crucial for developing strategies against cryptococcal brain infections.