Advanced Prostate Cancer Clinical Trial
Official title:
A Multi-centre, Single-arm, Prospective Study to Assess Efficacy and Safety of Neoadjuvant Hormone Therapy Using Zoladex (Goserelin) and Casodex (Bicalutamide) in Patients With Advanced Prostate Cancer Undergoing Radical Prostatectomy.
This is A Multi-centre, Single-arm, Prospective, Interventional Study to Assess Efficacy and Safety of Neoadjuvant Hormone Therapy using Zoladex (Goserelin) and Casodex (Bicalutamide) in Patients with Advanced Prostate Cancer Undergoing Radical Prostatectomy, to assess the efficacy by resectability rate of neoadjuvant hormone therapy (NHT) in subjects with advanced prostate cancer.
Neoadjuvant hormonal treatment (NHT) for clinically localised prostate cancer consists of complete androgen blockade (CAB) preceding either radiotherapy or surgery. The rational for this approach is based on the assumption that NHT will reduce both the tumour and normal prostatic tissue volume, and induce cancer regression by the mechanism of apoptosis [1]. Most randomized clinical trials show that NHT reduces the incidence of positive surgical margins after radical prostatectomy and apparently determines tumour downstaging, however no advantage has been documented in terms of biochemical disease progression [for example, time to prostate specific antigen (PSA) increase] between treated and untreated patients [2-8]. Because of relatively low biological aggressiveness of prostatic carcinoma, many patients will need to be followed for a considerable time before drawing significant conclusions on the effects of NHT on survival [2,4,7,10]. A large sample of 393 radical prostatectomy specimens were evaluated in 3 treatment groups, which were immediate surgery, 12 weeks of NHT (Zoladex and Casodex), and 24 weeks of NHT. Patients included clinical stage B (T2a and T2b) and stage C (T3a and T3b). Systemic hormonal treatment, whether 12 weeks or 24 weeks of NHT, is able to "downstage" the primary tumour and decrease the positive margin rate before definitive localised treatment [11]. Currently treatment of patients with oligometastatic prostate cancer is undergoing dramatic changes [12]. The local treatment of the primary tumour might provide a survival benefit to men with metastatic and lymph node-positive disease. Similar observations have been made in treatment of metastatic lesions with life-prolonging, rather than palliative intent [13-17]. This study is proposed primarily to observe the efficacy and safety of 24-week NHT (Zoladex and Casodex) in patients with locally advanced or oligometastatic prostate cancer. Progression status and survival will be followed-up for up to 2 years after NHT. This is a multi-centre, single-arm and prospective study to explore the efficacy and safety of neoadjuvant hormone therapy (NHT) for advanced prostate cancer patients undergoing radical prostatectomy (RP). A total of 104 subjects with locally advanced and oligometastatic prostate cancer at clinical stage of T3 and T4 will be enrolled at almost 20 centres in China. The eligible subjects will receive Casodex 50 mg orally per day in combination with Zoladex 10.8 mg implant subcutaneously every 12 weeks as neoadjuvant therapy for 24 weeks, and then will be assessed for resectability of the primary tumour. The subjects will undergo a RP [RALP (robot-assisted laparoscopic prostatectomy), laparoscopic RP or RRP (radical retropubic prostatectomy)] plus eLND thereafter if the primary tumour is assessed as resectable. Surgical margin status and involvement of bilateral pelvic lymph nodes will be evaluated. Subjects will be prescribed post-surgical treatment such as continuous ADT and metastasis-directed therapy upon investigator's discretion and be followed-up for up to 2 years. Progression free survival (PFS) and overall survival (OS) will be collected during this study. For the subjects with unresectable primary tumour after NHT, PFS and OS will also be collected in the follow-up for up to 2 years after 24 weeks of CAB. ;
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