Related Experiment Video
Updated: Jul 2, 2026

Exploring the Regulation of Lipid Droplet Catabolism through Lipophagy
Published on: January 31, 2025
Autophagy induction by a natural ingredient of areca nut
Mei-Huei Lin1, Shyun-Yeu Liu, Young-Chau Liu
1Department of Biotechnology, Chia Nan University of Pharmacy and Science, Tainan, Taiwan, ROC.
Abstract:
We recently identified an autophagy-inducing areca nut ingredient (AIAI) in the partially purified 30-100 kDa fraction of areca nut extract (ANE), designated as ANE 30-100K. Before disintegration, most ANE 30-100K-treated cells exhibit rounding morphology, cytoplasmic clearance, and nuclear shrinkage, distinct from arecoline- and cisplatin-induced cellular apoptosis. This unique death pattern is verified to be autophagy by LC3-I cleavage, acidic vesicles, and autophagic vacuoles. As analyzed by Molish's Test, Selinowaff's Test, and thin-layer chromatography, most of the ANE 30-100K constituents are carbohydrates, whereas the protein content of this fraction is less than 1% as assessed by protein assay reagent. The cytotoxicity of ANE 30-100K is further shown to be sensitive to cellulase and proteinase K digestion suggesting AIAI in ANE 30-100K to be a proteoglycan (or glycoprotein). Thus, although ANE contains apoptosis-inducing ingredients such as arecoline, it predominantly triggers autophagic cell death by this natural AIAI.
More Related Videos
Related Concept Videos
Autophagy
An autophagic pathway consists of a series of signaling events activated in response to diverse stress and physiological conditions such as food deprivation,...
Autophagic Cell Death
Autophagy and Apoptosis
Autophagy can activate apoptosis. In normal conditions, the autophagy activating protein Beclin-1 and pro-apoptotic...
Delivery Pathways to the Lysosome
Endocytosis
In endocytosis, the cell membrane takes up macromolecules and particles from the surrounding medium. Clathrin-mediated...
Phagocytosis of Apoptotic Cells
Normal cells contain receptors that prevent them from being recognized by phagocytes.
Cellular Injury V: Apoptosis and Autophagy
Phagocytosis

