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Exisulind, a selective apoptotic antineoplastic drug
1Department of Urology and Comprehensive Cancer Center, School of Medicine, Columbia-Presbyterian Medical Center, New York, USA. eg45@columbia.edu
Abstract:
Exisulind (Aptosyn, Cell Pathways, Inc.) is the first of a new class of targeted, pro-apoptotic drugs that show promise in the treatment of cancer. These agents induce apoptosis (i.e., programmed cell death) in a broad range of pre-cancerous and cancerous tissues without affecting normal cells. The antineoplastic effect of exisulind appears to be the result of activation of protein kinase G (PKG) which leads to multiple downstream effects culminating in apoptosis. Exisulind has demonstrated antineoplastic activity in solid tumour and haematological cancer cell lines and is an inhibitor of tumour growth in rodent models of colon, prostate, bladder, mammary and lung cancer. Preclinical data evaluating selective apoptotic antineoplastic drugs (SAANDs) in combination with various chemotherapy drugs indicates additive or synergistic antineoplastic effects. In clinical studies, exisulind prevented colorectal polyp formation in patients with familial adenomatous polyposis (FAP) over 24 months. In a randomised, placebo-controlled study of prostate cancer patients, exisulind inhibited the rise of prostate-specific antigen (PSA) in men with PSA progression after radical prostatectomy. Exisulind has been well-tolerated by most patients in clinical trials. In conclusion, preclinical evidence and early clinical results suggest that exisulind and other drugs in this class may have wide applications in treating cancer both as monotherapy and in combination with chemotherapy and other targeted agents.
Insights
Exisulind, a novel pro-apoptotic drug, effectively targets cancer cells by activating protein kinase G (PKG), leading to programmed cell death. Clinical studies show promise in preventing colorectal polyps and inhibiting prostate cancer progression.
Area of Science:
- Oncology
- Molecular Biology
- Pharmacology
Background:
- Exisulind is a novel targeted pro-apoptotic drug.
- It selectively induces apoptosis in cancerous tissues via protein kinase G (PKG) activation.
- This mechanism offers a new approach to cancer treatment.
Purpose of the Study:
- To evaluate the antineoplastic effects of exisulind.
- To assess its efficacy in preclinical cancer models and clinical trials.
- To explore its potential as a monotherapy or in combination treatments.
Main Methods:
- Preclinical studies in cancer cell lines and rodent models.
- Clinical trials in patients with familial adenomatous polyposis (FAP) and prostate cancer.
- Evaluation of exisulind's effect on tumor growth and specific biomarkers (e.g., PSA).
Main Results:
- Exisulind demonstrated antineoplastic activity in various solid and hematological cancer cell lines.
- It inhibited tumor growth in multiple rodent cancer models.
- Clinical studies showed exisulind prevented colorectal polyp formation and slowed PSA progression in prostate cancer patients.
Conclusions:
- Exisulind exhibits significant preclinical and early clinical antineoplastic activity.
- Its pro-apoptotic mechanism and safety profile suggest broad therapeutic potential.
- Exisulind may be effective as a monotherapy or in combination with chemotherapy and other targeted agents.
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