The marine compound spongistatin 1 targets pancreatic tumor progression and metastasis
| Autor: | Ivan Ischenko, Christiane J. Bruns, Uta M. Schneiders, Stefan Zahler, Angelika M. Vollmar, Romina M. Wiedmann, Andrea S. Rothmeier, Anita Rudy |
|---|---|
| Rok vydání: | 2010 |
| Předmět: |
Cancer Research
Pathology medicine.medical_specialty Blotting Western Mice Nude Apoptosis Spongistatin Biology Metastasis Colony-Forming Units Assay Mice Liver Neoplasms Experimental Cell Movement In vivo Pancreatic tumor Pancreatic cancer Cell Adhesion medicine Animals Humans Anoikis RNA Messenger Phosphorylation Cell Proliferation Mice Inbred BALB C Reverse Transcriptase Polymerase Chain Reaction Cell Cycle Cell migration medicine.disease Xenograft Model Antitumor Assays Tubulin Modulators Pancreatic Neoplasms Proto-Oncogene Proteins c-bcl-2 Oncology Tumor progression Lymphatic Metastasis Cancer research Female Macrolides |
| Zdroj: | International Journal of Cancer. 127:1096-1105 |
| ISSN: | 1097-0215 0020-7136 |
| DOI: | 10.1002/ijc.25241 |
| Popis: | Treatment of pancreatic cancer remains a major challenge and new anticancer drugs are urgently required. Our study presents the marine natural compound spongistatin 1 as a promising experimental drug. Spongistatin 1 was applied in an orthotopic in vivo model of human pancreatic cancer. Spongistatin 1 significantly reduced tumor growth, which correlates with a strong apoptosis induction (DNA-fragmentation) and long-term effects on clonogenic survival of pancreatic tumor cells (L3.6pl) in vitro. In addition, the formation of metastasis was reduced in spongistatin 1-treated mice, which is in line with a diminished MMP-9 activity in tumor tissue determined by zymography. Based on the pronounced efficacy of spongistatin 1, the underlying mechanisms were studied in more detail. In vitro adhesion, as well as migration, and invasion assays showed spongistatin 1 to influence these critical steps in the metastatic cascade. Furthermore, spongistatin 1 induced anoikis in L3.6pl cells. Exposure to spongistatin 1 leads to phosphorylation, and thus inactivation of the antiapoptotic protein Bcl-2 in pancreatic tumor cells. siRNA experiments silencing Bcl-2 suggest a role of Bcl-2 in anoikis and cell migration. Taken together, spongistatin 1 not only proved to be a potent experimental drug but also served as a chemical tool to examine the role of the antiapoptotic protein Bcl-2 in pancreas carcinoma, thereby supporting the hypothesis of a link between apoptosis signaling and metastasis. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Plný text