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Published on: May 15, 2019
Enzastaurin
1Division of Hematology/Oncology, Department of Medicine, Robert H. Lurie Comprehensive Cancer Center, Northwestern University, Chicago, Illinois 60611, USA.
Purpose Of Review:
Enzastaurin - a novel oral antitumor agent that selectively inhibits protein kinase Cbeta activity - has demonstrated promise in phase I and II trials in various advanced cancers, and is being investigated in multiple hematologic malignancies and solid tumors.
Recent Findings:
Enzastaurin (LY317615) was initially developed as an antiangiogenic cancer therapy. Subsequent preclinical studies showed its antitumor effect by inhibiting tumor proliferation and inducing apoptosis on multiple cancer cell lines as well as xenograft models. Enzastaurin not only inhibits protein kinase Cbeta activity but also suppresses signaling through the phosphoinositide-3 kinase/AKT pathway. Based on the phase I study, 525 mg/day is the recommended dose for oral enzastaurin. It is well tolerated at this dose, with no clinically significant grade 3 or 4 toxicities. A recent phase II study of enzastaurin in patients with relapsed or refractory diffuse large B-cell lymphoma showed enzastaurin to be associated with prolonged freedom from progression. Several preliminary studies showed promising results in patients with various advanced cancers and suggested that enzastaurin can be safely used long term in combination with traditional chemotherapies.
Summary:
Enzastaurin is emerging as a promising new antitumor treatment. This review addresses the mechanism of action, development, preclinical studies, and clinical study results with enzastaurin.
Insights
Enzastaurin, an oral antitumor drug, shows promise in treating advanced cancers by inhibiting protein kinase Cbeta and the AKT pathway. Clinical trials indicate it is well-tolerated and effective, particularly in diffuse large B-cell lymphoma.
Area of Science:
- Oncology
- Pharmacology
- Molecular Biology
Background:
- Enzastaurin is a novel oral antitumor agent targeting protein kinase Cbeta.
- It has shown potential in early-phase trials for various advanced cancers.
Purpose of the Study:
- To review the mechanism of action, development, and clinical results of Enzastaurin.
- To assess its efficacy and safety in hematologic malignancies and solid tumors.
Main Methods:
- Preclinical studies evaluated antitumor effects on cancer cell lines and xenografts.
- Phase I and II clinical trials assessed safety, dosage, and efficacy in cancer patients.
Main Results:
- Enzastaurin inhibits protein kinase Cbeta and the phosphoinositide-3 kinase/AKT pathway.
- The recommended oral dose is 525 mg/day, with good tolerability and no significant grade 3 or 4 toxicities.
- Phase II studies in diffuse large B-cell lymphoma demonstrated prolonged freedom from progression.
Conclusions:
- Enzastaurin is an emerging and promising antitumor treatment.
- It can be safely used long-term in combination with chemotherapy for various advanced cancers.
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