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801
TRX2/Rab35 Interaction Impairs Exosome Secretion by Inducing Rab35 Degradation
Tao Zhang1, Lili Zhao1, Liping Han1
1College of Life Sciences, Sichuan University, Chengdu 610065, China.
International Journal of Molecular Sciences
|June 24, 2022
Summary
Mitochondrial thioredoxin 2 (TRX2) inhibits exosome secretion and cell migration by degrading Rab35. This study reveals TRX2
Area of Science:
- Cell Biology
- Molecular Biology
- Cancer Research
Background:
- Exosomes mediate intercellular communication and hold therapeutic potential.
- Mechanisms regulating exosome secretion are not fully understood.
- Mitochondrial components in exosomes suggest mitochondria-vesicle communication.
Purpose of the Study:
- Investigate the role of mitochondrial thioredoxin 2 (TRX2) in exosome secretion.
- Elucidate the molecular mechanism linking mitochondria and exosome release.
- Determine the impact of TRX2 on cell migration.
Main Methods:
- Coimmunoprecipitation/mass spectrometry (Co-IP/MS) to identify protein interactions.
- Analysis of exosome concentration and cell migration assays.
- Investigation of protein localization and degradation pathways.
Main Results:
- Mitochondrial TRX2 interacts with Rab35.
- TRX2 induces Rab35 degradation, impairing exosome secretion.
- TRX2 suppresses HCT116 cell migration, mediated by Rab35 and exosomes.
Conclusions:
- TRX2 plays a novel regulatory role in exosome secretion and cell migration.
- TRX2-Rab35 interaction provides insight into upstream regulation of Rab35.
- Findings offer molecular evidence for mitochondria-vesicle communication.
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