A novel taspine derivative, HMQ1611, inhibits breast cancer cell growth via estrogen receptor α and EGF receptor signaling pathways.

Abstract

Breast cancer is a common cancer with a leading cause of cancer mortality in women. Currently, the chemotherapy for breast cancer is underdeveloped. Here, we report a novel taspine derivative, HMQ1611, which has anticancer effects using in vitro and in vivo breast cancer models. HMQ1611 reduced cancer cell proliferation in four human breast cancer cell lines including MDA-MB-231, SK-BR-3, ZR-75-30, and MCF-7. HMQ1611 more potently reduced growth of estrogen receptor α (ERα)-positive breast cancer cells (ZR-75-30 and MCF-7) than ERα-negative cells (MDA-MB-231 and SK-BR-3). Moreover, HMQ1611 arrested breast cancer cell cycle at S-phase. In vivo tumor xenograft model, treatment of HMQ1611 significantly reduced tumor size and weight compared with vehicles. We also found that HMQ1611 reduced ERα expression and inhibited membrane ERα-mediated mitogen-activated protein kinase (MAPK) signaling following the stimulation of cells with estrogen. Knockdown of ERα by siRNA transfection in ZR-75-30 cells attenuated HMQ1611 effects. In contrast, overexpression of ERα in MDA-MB-231 cells enhanced HMQ1611 effects, suggesting that ERα pathway mediated HMQ1611's inhibition of breast cancer cell growth in ERα-positive breast cancer. HMQ1611 also reduced phosphorylation of EGF receptor (EGFR) and its downstream signaling players extracellular signal-regulated kinase (ERK)1/2 and AKT activation both in ZR-75-30 and MDA-MB-231 cells. These results showed that the novel compound HMQ1611 had anticancer effects, and partially via ERα and/or EGFR signaling pathways, suggesting that HMQ1611 may be a potential novel candidate for human breast cancer intervention.

• Authors: Yingzhuan Zhan, Yanmin Zhang, Cuicui Liu, Jie Zhang, Wanli W Smith, Nan Wang, Yinnan Chen, Lei Zheng, Langchong He
• Journal: Cancer prevention research (Philadelphia, Pa.) (Cancer Prev Res (Phila)) Vol. 5 Issue 6 Pg. 864-73 (Jun 2012) ISSN: 1940-6215 [Electronic] United States
• PMID: 22496388 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
• Copyright: ©2012 AACR.

Chemical References

• Acetanilides
• Alkaloids
• Antineoplastic Agents
• Benzamides
• ESR1 protein, human
• Estrogen Receptor alpha
• HMQ1611
• RNA, Messenger
• Epidermal Growth Factor
• EGFR protein, human
• ErbB Receptors
• Proto-Oncogene Proteins c-akt
• Extracellular Signal-Regulated MAP Kinases
• taspine

Topics

• Acetanilides (pharmacology)
• Alkaloids (chemistry)
• Animals
• Antineoplastic Agents (pharmacology)
• Apoptosis (drug effects)
• Benzamides (pharmacology)
• Blotting, Western
• Breast Neoplasms (metabolism, pathology)
• Cell Cycle (drug effects)
• Cell Proliferation (drug effects)
• Epidermal Growth Factor (pharmacology)
• ErbB Receptors (genetics, metabolism)
• Estrogen Receptor alpha (genetics, metabolism)
• Extracellular Signal-Regulated MAP Kinases (genetics, metabolism)
• Female
• Humans
• Immunoenzyme Techniques
• Mice
• Mice, Inbred BALB C
• Mice, Nude
• Phosphorylation (drug effects)
• Proto-Oncogene Proteins c-akt (genetics, metabolism)
• RNA, Messenger (genetics)
• Real-Time Polymerase Chain Reaction
• Reverse Transcriptase Polymerase Chain Reaction
• Tumor Cells, Cultured