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Linking dengue virus entry and translation/replication through amphisomes.
Mingkwan Panyasrivanit1, Atefeh Khakpoor, Nitwara Wikan
1Molecular Pathology Laboratory, Institute of Molecular Biology and Genetics, Mahidol University, Nakorn Pathom, Thailand.
Autophagy
|February 10, 2009
Summary
Amphisomes, formed by fusing autophagosomes and endosomes, are where Dengue virus replicates. This study reveals amphisomes are key sites linking Dengue virus entry to its replication and translation.
Area of Science:
- Cell Biology
- Virology
- Molecular Biology
Background:
- Amphisomes are crucial preautolysosomal vacuoles merging autophagosomes and endosomes.
- They represent a convergence point for endocytic and autophagic cellular pathways.
- Dengue virus entry into host cells occurs via clathrin-mediated endocytosis.
Purpose of the Study:
- To investigate the role of amphisomes in the Dengue virus life cycle.
- To determine if amphisomes serve as a site for Dengue virus replication and translation.
- To link Dengue virus entry mechanisms with its early replication stages.
Main Methods:
- Utilizing markers for Dengue virus, autophagic vesicles, and endosomal vesicles.
- Observing the colocalization of Dengue virus markers with amphisome markers.
- Analyzing Dengue virus replication and translation within these cellular compartments.
Main Results:
- Dengue virus markers colocalized significantly with markers for both autophagic and endosomal vesicles.
- Evidence indicates amphisomes are a primary site for Dengue virus replication.
- Dengue virus translation was also observed to occur within amphisomes.
Conclusions:
- Amphisomes are identified as a critical site for Dengue virus replication and translation.
- This research establishes a direct link between Dengue virus entry and its replication processes.
- The early Dengue virus life cycle is characterized by sustained association with endosomal-autophagosomal lineage membranes.
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