Dwarf elder fruits (Sambucus ebulus) contain the ribosome-inactivating lectin ebulin f structurally related to ricin. We investigated intraperitoneal toxicity of ebulin f in mice and found that it triggers specific derangement of the intestines. Ebulin f was much less toxic than ricin to mice when administered intraperitoneally. The targets were cells of the intestinal crypts, which underwent apoptosis. Small intestine crypts were more sensitive than large intestine crypts.
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http://dx.doi.org/10.1016/j.toxicon.2012.10.009 | DOI Listing |
J Biomol Struct Dyn
October 2024
Biomolecular Structure and Dynamics Group, Department of Biotechnology, National Institute of Technology, Warangal, India.
Ribosome Inactivating Proteins (RIPs) act by irreversibly depurinating the 28S rRNA ricin-sarcin loop (SRL) of the eukaryotic ribosome resulting in protein synthesis inhibition. In general, they consist of two variants: Type I which is single chained (∼30 kDa), and Type II, a more toxic variant which is a Type I N-glycosidase chain covalently linked to a lectin chain. These proteins are believed to play a pivotal role in defence mechanisms.
View Article and Find Full Text PDFToxins (Basel)
January 2021
Department of Biochemistry and Molecular Biology and Physiology, Faculty of Sciences, University of Valladolid, E-47011 Valladolid, Spain.
Ebulin l is an A-B toxin, and despite the presence of a B chain, this toxin displays much less toxicity to cells than the potent A-B toxin ricin. Here, we studied the binding, mechanisms of endocytosis, and intracellular pathway followed by ebulin l and compared it with ricin. COS-1 cells and HeLa cells with inducible synthesis of a mutant dynamin (K44A) were used in this study.
View Article and Find Full Text PDFToxins (Basel)
August 2020
Area of Pharmaceutics and Food Technology, Faculty of Pharmacy, Complutense University of Madrid, 28040 Madrid, Spain.
The safety of concentrated food complements intake is a major health concern. It has been well established that green tea polyphenols (GTPs) consumption promotes healthy effects. However, the ingestion of large amounts of GTPs is a matter of controversy due to reported adverse effects.
View Article and Find Full Text PDFHistol Histopathol
September 2018
Area of Nutrition and Food Sciences, Faculty of Medicine, University of Valladolid, Valladolid, Spain.
Ebulin f is a ribosome-inactivating protein (RIP) present in green fruits of the dwarf elder (Sambucus ebulus L). Since dwarf elder fruits are used for food and as a medicine, we assessed the study of toxicological effects and safety of ebulin f in elderly mice, comparing these results with those reported in young animals and with other RIPs. Female Swiss mice aged 6 and 12 months of age were intraperitoneally injected with a single dose from 1.
View Article and Find Full Text PDFBiochim Biophys Acta Gen Subj
March 2018
Department of Biochemistry and Molecular Biology and Physiology, Faculty of Sciences, University of Valladolid, E-47011 Valladolid, Spain. Electronic address:
Background: Sambucus ebulus is a rich source of ribosome-inactivating proteins (RIPs) and RIP-related lectins generated from multiple genes. These proteins differ in their structure, enzymatic activity and sugar binding specificity.
Methods: We have purified and characterized ebulin-RP from S.
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