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Curcumin Modulates Pancreatic Adenocarcinoma Cell-Derived Exosomal Function
Carlos J Diaz Osterman1, James C Lynch1, Patrick Leaf1
1Division of Biochemistry, Center for Health Disparities and Molecular Medicine, Loma Linda University, Loma Linda, California, United States of America.
Plos One
|July 16, 2015
Summary
Curcumin, a compound found in turmeric, can be delivered by pancreatic cancer cell exosomes. This exosomal curcumin promotes cancer cell death, suggesting a new therapeutic strategy for pancreatic cancer.
Area of Science:
- Oncology
- Biochemistry
- Cell Biology
Background:
- Pancreatic cancer exhibits high mortality, potentially due to cancer cell communication via exosomes.
- Tumor-derived exosomes promote cancer progression by carrying pro-survival molecules.
- Therapeutic strategies targeting both cancer cells and exosomes are needed for pancreatic cancer eradication.
Purpose of the Study:
- To investigate the functional alterations of exosomes from curcumin-treated pancreatic cancer cells.
- To determine if curcumin alters the pro-survival role of pancreatic cancer cell exosomes.
- To assess the impact of exosomal curcumin on recipient pancreatic cancer cell viability.
Main Methods:
- Utilized an in vitro cell culture model with PANC-1 and MIA PaCa-2 pancreatic adenocarcinoma cell lines.
- Incorporated curcumin into exosomes from treated cells, confirmed by spectral studies and fluorescence microscopy.
- Delivered curcumin via exosomes to recipient cells and measured cytotoxicity using Hoffman modulation contrast microscopy, AlamarBlue, and Trypan blue exclusion assays.
Main Results:
- Curcumin was successfully incorporated into exosomes released by pancreatic cancer cells.
- Exosomes containing curcumin were delivered to recipient pancreatic cancer cells.
- Delivery of curcumin via exosomes resulted in significant cytotoxicity, reducing recipient cell viability.
Conclusions:
- Curcumin can be packaged into pancreatic cancer cell exosomes and delivered to other cancer cells.
- Exosomal curcumin can switch from a pro-survival to a pro-death role in recipient pancreatic cancer cells.
- This exosome-mediated delivery mechanism enhances curcumin's efficacy against pancreatic cancer, offering a potential therapeutic avenue.
