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Updated: Aug 6, 2026
14:18
A Strategy for Sensitive, Large Scale Quantitative Metabolomics
Published on: May 27, 2014
A vital sugar code for ricin toxicity
Jasmin Taubenschmid1, Johannes Stadlmann1, Markus Jost2
1IMBA, Institute of Molecular Biotechnology of the Austrian Academy of Sciences, VBC - Vienna BioCenter Campus, Dr. Bohr-Gasse 3, 1030 Vienna, Austria.
Cell Research
|September 20, 2017
Summary
Scientists identified key regulators of ricin toxicity, showing that inhibiting fucosylation makes cells resistant to this deadly toxin. This discovery offers potential strategies against ricin bioweapons.
Area of Science:
- Biochemistry
- Cell Biology
- Toxicology
Background:
- Ricin is a highly toxic protein with no existing antidote, posing a significant bioweapon threat.
- Understanding the molecular mechanisms of ricin toxicity is crucial for developing countermeasures.
Purpose of the Study:
- To identify key molecular pathways regulating ricin toxicity.
- To explore potential strategies for conferring cellular resistance to ricin.
Main Methods:
- Genetic manipulation of fucosylation pathways (Slc35c1, Fut9).
- Pharmacological inhibition of fucosylation.
- Analysis of intracellular trafficking and cell surface glycan structures (Lewis X, sialylation).
- Assessment of cell sensitivity to ricin exposure.
Main Results:
- Inhibition of the Golgi GDP-fucose transporter (Slc35c1) and fucosyltransferase (Fut9) confers resistance to ricin.
- Reduced fucosylation leads to increased sialylation of Lewis X, masking ricin-binding sites.
- Cells with SLC35C1 deficiency are resistant to ricin.
- Modulating sialyltransferase St3Gal4 affects ricin sensitivity.
Conclusions:
- Fucosylation and sialylation pathways are critical regulators of ricin toxicity.
- Targeting these glycosylation pathways offers a novel strategy to control ricin toxicity.
- Insights into the 'sugar code' can be leveraged for biodefense applications.
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