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01.02.2008 | PHASE II STUDIES | Ausgabe 1/2008

Investigational New Drugs 1/2008

Weekly docetaxel, zoledronic acid and estramustine in hormone-refractory prostate cancer (HRPC)

Zeitschrift:
Investigational New Drugs > Ausgabe 1/2008
Autoren:
Joseph G. Kattan, Fady S. Farhat, Georges Y. Chahine, Fady L. Nasr, Walid T. Moukadem, Fariha C. Younes, Nadine J. Yazbeck, Marwan G. Ghosn, Cancer Research Group
Wichtige Hinweise
Presented as a Poster at the XXth European Association of Urology Congress; 16–19 March 2005, Istanbul, Turkey.

Summary

Treatment options for patients with hormone refractory prostate cancer (HRPC) showed unsatisfactory outcomes. Docetaxel-based combinations could offer more promising and tolerated results. A phase II trial was conducted with the combination of zoledronic acid, docetaxel and estramustine. Eligibility consisted of metastatic prostate adenocarcinoma with objective progression or rising prostate specific antigen levels (PSA) despite androgen deprivation therapy. Zoledronic acid was given at a dose of 4 mg on day 1, docetaxel (25 mg/m2) on days 1, 8 and 15, and estramustine orally at 140 mg two times daily on days 1 to 21 of a 28-day cycle. Twenty-seven patients were enrolled between October 2002 and November 2004. Median age was 68 years (53–83 years). A total of 124 cycles were administered with a median of 4.6 cycles per patient (1–8 cycles). The major toxicities were grades 1 to 3 anemia (55%), fatigue (15%), alopecia (11%) and hypocalcemia (11%). Two patients presented with deep venous thrombosis and died from pulmonary embolism. Another third patient died from Stevens–Johnson syndrome and grade 4 hepatic toxicity. Out of the 25 patients assessed for efficacy, 13 (52%) had a biologic response (>50% PSA decline). Three (21%) patients among the 14 with measurable disease had objective response: 1 complete response (CR) and 2 partial responses (PR). Response duration was 2 months for PR and 4 months for CR. A total of 12 patients (48%) experienced clinical benefit with pain reduction. This combination seemed effective; however toxic deaths especially from venous thrombosis counterbalanced the advantage of this regimen.

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