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Anchoring-Detection Fluorescent Probe for Investigating Microcystin-LR-Induced Plasma Membrane Damage.

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Researchers developed a novel fluorescent probe to visualize how microcystin-LR (MC-LR) damages liver cells. The probe revealed MC-LR causes plasma membrane contraction, wrinkling, and permeability loss, impacting cell integrity and nuclear structure.

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Area of Science:

  • Toxicology
  • Cell Biology
  • Biochemistry

Background:

  • Microcystin-LR (MC-LR) is a potent cyanobacterial hepatotoxin with significant public health implications.
  • Understanding MC-LR's toxic mechanism is crucial for drinking water safety and disease pathogenesis.
  • Existing visualization tools are insufficient to study MC-LR-induced plasma membrane damage in situ.

Purpose of the Study:

  • To develop a fluorescent probe for simultaneous imaging of plasma membranes and MC-LR.
  • To elucidate the dynamic process of plasma membrane damage induced by MC-LR.
  • To investigate the effects of MC-LR on hepatocyte structure and function.

Main Methods:

  • Development of a robust anchoring and specific recognition fluorescent probe.
  • Simultaneous fluorescence imaging of plasma membrane and MC-LR accumulation.
  • In situ observation of primary hepatocyte damage using the developed probe.

Main Results:

  • The probe successfully visualized MC-LR accumulation on the plasma membrane.
  • MC-LR induced sequential plasma membrane changes: contraction, wrinkling, and ulceration.
  • Hepatocyte damage involved loss of membrane permeability regulation, nuclear collapse, and nuclear envelope contraction.

Conclusions:

  • The developed fluorescent probe enables real-time visualization of MC-LR-induced cellular damage.
  • MC-LR causes distinct stages of plasma membrane damage, leading to cell dysfunction.
  • This study provides critical insights into MC-LR hepatotoxicity and potential health risks.