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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Invest+New+Drugs
2015 ; 33
(2
): 397-408
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Phase 1/2 study of orteronel (TAK-700), an investigational 17,20-lyase inhibitor,
with docetaxel-prednisone in metastatic castration-resistant prostate cancer
#MMPMID25556680
Petrylak DP
; Gandhi JG
; Clark WR
; Heath E
; Lin J
; Oh WK
; Agus DB
; Carthon B
; Moran S
; Kong N
; Suri A
; Bargfrede M
; Liu G
Invest New Drugs
2015[Apr]; 33
(2
): 397-408
PMID25556680
show ga
BACKGROUND: Docetaxel-prednisone (DP) is an approved therapy for metastatic
castration-resistant prostate cancer (mCRPC). Orteronel (TAK-700) is an
investigational, selective, non-steroidal inhibitor of 17,20-lyase, a key enzyme
in androgenic hormone production. This phase 1/2 study evaluated orteronel plus
DP in mCRPC patients. METHODS: Adult men with chemotherapy-naïve mCRPC, serum
prostate-specific antigen (PSA) ?5 ng/mL, and serum testosterone <50 ng/dL
received oral orteronel 200 or 400 mg twice-daily (BID) in phase 1 to determine
the recommended dose for phase 2, plus intravenous docetaxel 75 mg/m(2) every 3
weeks, and oral prednisone 5 mg BID. Phase 2 objectives included safety,
pharmacokinetics, and efficacy. RESULTS: In phase 1 (n?=?6, orteronel 200 mg;
n?=?8, orteronel 400 mg), there was one dose-limiting toxicity of grade 3 febrile
neutropenia at 400 mg BID. This dose was evaluated further in phase 2 (n?=?23).
After 4 cycles, 68, 59, and 23% of patients achieved ?30, ?50, and ?90% PSA
reductions, respectively; median best PSA response was -77%. Seven of 10 (70%)
RECIST-evaluable patients achieved objective partial responses. Median time to
PSA progression and radiographic disease progression was 6.7 and 12.9 months,
respectively. Dehydroepiandrosterone-sulfate (DHEA-S) and testosterone levels
were rapidly and durably reduced. Common adverse events were fatigue (78%),
alopecia (61%), diarrhea (48%), nausea (43%), dysgeusia (39%), and neutropenia
(39%). Orteronel and docetaxel pharmacokinetics were similar alone and in
combination. CONCLUSIONS: Orteronel plus DP was tolerable, with substantial
reductions in PSA, DHEA-S, and testosterone levels, and evidence for measurable
disease responses.
|Aged
[MESH]
|Aged, 80 and over
[MESH]
|Antineoplastic Agents/administration & dosage/adverse effects/*therapeutic use
[MESH]