Abstract | BACKGROUND: METHODOLOGY/PRINCIPAL FINDINGS:
Cysteamine's anti-invasion effects were studied by matrigel invasion and cell migration assays in 10 pancreatic cancer cell lines. To study mechanism of action, we examined cell viability and matrix metalloproteinases ( MMPs) activity in the cysteamine-treated cells. We also examined cysteamine's anti- metastasis effect in two orthotopic murine models of human pancreatic cancer by measuring peritoneal metastasis and survival of animals. Cysteamine inhibited both migration and invasion of all ten pancreatic cancer cell lines at concentrations (<25 mM) that caused no toxicity to cells. It significantly decreased MMPs activity (IC(50) 38-460 µM) and zymographic gelatinase activity in a dose dependent manner in vitro and in vivo; while mRNA and protein levels of MMP-9, MMP-12 and MMP-14 were slightly increased using the highest cysteamine concentration. In vivo, cysteamine significantly decreased metastasis in two established pancreatic tumor models, although it did not affect the size of primary tumors. Additionally, cysteamine prolonged survival of mice in a dose-dependent manner without causing any toxicity. Similar to the in vitro results, MMP activity was significantly decreased in animal tumors treated with cysteamine. Cysteamine had no clinical or preclinical adverse effects in the host even at the highest dose. CONCLUSIONS/SIGNIFICANCE:
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Authors | Toshio Fujisawa, Benjamin Rubin, Akiko Suzuki, Prabhudas S Patel, William A Gahl, Bharat H Joshi, Raj K Puri |
Journal | PloS one
(PLoS One)
Vol. 7
Issue 4
Pg. e34437
( 2012)
ISSN: 1932-6203 [Electronic] United States |
PMID | 22532830
(Publication Type: Journal Article)
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Chemical References |
- Antineoplastic Agents
- Enzyme Inhibitors
- Matrix Metalloproteinase Inhibitors
- Cysteamine
- Matrix Metalloproteinases
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Topics |
- Animals
- Antineoplastic Agents
(pharmacology, therapeutic use)
- Cell Line, Tumor
- Cell Movement
(drug effects)
- Cell Survival
(drug effects)
- Cysteamine
(pharmacology, therapeutic use)
- Disease Models, Animal
- Enzyme Inhibitors
(pharmacology, therapeutic use)
- Matrix Metalloproteinase Inhibitors
- Matrix Metalloproteinases
(metabolism)
- Mice
- Neoplasm Metastasis
- Pancreatic Neoplasms
(drug therapy, metabolism, pathology)
- Tumor Cells, Cultured
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