A combination of sorafenib and SC-43 is a synergistic SHP-1 agonist duo to advance hepatocellular carcinoma therapy.

Abstract

Sorafenib is the first and currently the only standard treatment for advanced hepatocellular carcinoma (HCC). We previously developed a sorafenib derivative SC-43, which exhibits much more enhanced anti-HCC activity than sorafenib and also promotes apoptosis in sorafenib-resistant HCC cells. Herein, a novel "sorafenib plus" combination therapy was developed by coupling sorafenib treatment with SC-43. Both sorafenib and SC-43 are proven Src homology region 2 domain containing phosphatase 1 (SHP-1) agonists. The combined actions of sorafenib and SC-43 enhanced SHP-1 activity, which was associated with diminished STAT3-related signals and stronger expression of apoptotic genes above that of either drug alone, culminating in increased cell death. Decreased p-STAT3 signaling and tumor size, as well as increased SHP-1 activity were observed in mice receiving the combination therapy in a subcutaneous HCC model. More reduced orthotopic HCC tumor size and prolonged survival were also observed in mice in the combination treatment arm compared to mice in either of the monotherapy arms. These results in the preclinical setting pave the way for further clinical studies to treat unresectable HCC.

• Authors: Tzu-I Chao, Wei-Tien Tai, Man-Hsin Hung, Ming-Hsien Tsai, Min-Hsuan Chen, Mao-Ju Chang, Chung-Wai Shiau, Kuen-Feng Chen
• Journal: Cancer letters (Cancer Lett) Vol. 371 Issue 2 Pg. 205-13 (Feb 28 2016) ISSN: 1872-7980 [Electronic] Ireland
• PMID: 26679051 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
• Copyright: Copyright © 2015 Elsevier Ireland Ltd. All rights reserved.

Chemical References

• Enzyme Activators
• Phenyl Ethers
• Phenylurea Compounds
• SC-43 compound
• STAT3 Transcription Factor
• STAT3 protein, human
• Niacinamide
• Sorafenib
• PTPN6 protein, human
• Protein Tyrosine Phosphatase, Non-Receptor Type 6

Topics

• Animals
• Antineoplastic Combined Chemotherapy Protocols (pharmacology)
• Apoptosis (drug effects)
• Carcinoma, Hepatocellular (drug therapy, enzymology, pathology)
• Cell Line, Tumor
• Dose-Response Relationship, Drug
• Drug Synergism
• Enzyme Activation
• Enzyme Activators (pharmacology)
• Humans
• Liver Neoplasms (drug therapy, enzymology, pathology)
• Mice, Nude
• Niacinamide (analogs & derivatives, pharmacology)
• Phenyl Ethers (pharmacology)
• Phenylurea Compounds (pharmacology)
• Phosphorylation
• Protein Tyrosine Phosphatase, Non-Receptor Type 6 (metabolism)
• STAT3 Transcription Factor (metabolism)
• Signal Transduction (drug effects)
• Sorafenib
• Time Factors
• Tumor Burden (drug effects)
• Xenograft Model Antitumor Assays