DRUG APPROVALS BY DR ANTHONY MELVIN CRASTO
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http://www.ncbi.nlm.nih.gov/pubmed/23863727
Source
Dept. of Surgery, Saga University Faculty of Medicine.
Abstract
Introduction: Toremifene(TOR)is a selective estrogen receptor modulator(SERM). A high dose of 120 mg TOR(HD-TOR) has been used for recurrent breast cancer in Japan, but there is still insufficient evidence regarding the efficacy of HD-TOR. Patients and methods: HD-TOR was administered for recurrent or metastatic breast cancer between January 2003 and May 2012. The primary end point of the study was the tumor response rate. Bone metastasis cases were excluded from the efficacy analysis, but were included in the safety population. Results: A total of 21 patients registered in the study and the 2 patients with bone metastasis only were excluded from the efficacy analysis. The median follow-up period was 8. 3 months. None of the patients in the study had a CR, 4 had a PR(21. 1%), 9 had SD(47. 4%), and 6 had PD(31. 6%). Eight of the 9 SD cases had a long-term SD. The ORR was 21. 1% and the CB rate was 63. 2%. The median TTP of CB cases was 18. 3 months. None of the patients discontinued treatment because of a grade 3 or grade 4 adverse effects. Conclusion: In summary, the current study showed that HD-TOR may lead to a CB for recurrent breast cancer in first- or second-line treatment rather than thirdline. In particular, HD-TOR may give a benefit in highly endocrine-sensitive cases.
toremifene
Toremifene citrate is an oral selective estrogen receptor modulator (SERM) which helps oppose the actions of estrogen in the body. Licensed in the United States under the brand name Fareston, toremifene citrate is FDA-approved for use in advanced (metastatic)breast cancer. It is also being evaluated for prevention of prostate cancer under the brand name Acapodene.[1]
In 2007 the pharmaceutical company GTx, Inc was conducting two different phase 3clinical trials; First, a pivotal Phase clinical trial for the treatment of serious side effects ofandrogen deprivation therapy (ADT) (especially vertebral/spine fractures and hot flashes, lipid profile, and gynecomastia) for advanced prostate cancer, and second, a pivotal Phase III clinical trial for the prevention of prostate cancer in high risk men with high gradeprostatic intraepithelial neoplasia, or PIN. Results of these trials are expected by first quarter of 2008[2]
An NDA for the first application (relief of prostate cancer ADT side effects) was submitted in Feb 2009,[3] and in Oct 2009 the FDA said they would need more clinical data, e.g. another phase III trial.[4]
- Price N, Sartor O, Hutson T, Mariani S. Role of 5a-reductase inhibitors and selective estrogen receptor modulators as potential chemopreventive agents for prostate cancer.Clin Prostate Cancer 2005;3:211-4. PMID 15882476
- “GTx’s Phase III Clinical Development of ACAPODENE on Course Following Planned Safety Review” (Press release). GTx Inc. 2007-07-12. Retrieved 2006-07-14.
- “GTx Announces Toremifene 80 mg NDA Accepted for Review by FDA” (Press release).
- “GTx and Ipsen End Prostate Cancer Collaboration due to Costs of FDA-Requested Phase III Study”. 2 Mar 2011.
New Drug Approvals 