scholarly journals Stunning Response with Low-Dose Enzalutamide after Abiraterone Acetate Failure in a Patient Diagnosed with Metastatic Castration-Resistant Prostate Cancer: A Case Report

2021 ◽  
pp. 634-640
Author(s):  
Luigi Rossi ◽  
Giuseppe Cimino ◽  
Elisa Gozzi ◽  
Marsela Sinjari ◽  
Martina Brandi ◽  
...  
Keyword(s):  
Prostate Cancer ◽  
Low Dose ◽  
Performance Status ◽  
Poor Performance ◽  
Abiraterone Acetate ◽  
Poor Performance Status ◽  
Castration Resistant Prostate Cancer ◽  
Castration Resistant ◽  
Biochemical Progression ◽  
Lh Rh

We report a case of an elderly patient with metastatic castration-resistant prostate cancer, initially treated with abiraterone acetate (1,000 mg/day) combined with LH-RH antagonist, prednisone (10 mg/day), and zoledronic acid to manage bone metastases. In consideration of his poor performance status, radiological and biochemical progression of the disease, we decided to switch abiraterone to enzalutamide (160 mg/day). Due to adverse events, we reduced enzalutamide to a dose of 80 mg/day. Currently, the disease is under control despite the use of a low dose of enzalutamide.

Outcomes with Abiraterone Acetate in Metastatic Castration-resistant Prostate Cancer Patients Who Have Poor Performance Status

2015 ◽  
Vol 67 (3) ◽  
pp. 441-447 ◽  
Author(s):  
Arun A. Azad ◽  
Bernhard J. Eigl ◽  
Raya Leibowitz-Amit ◽  
Renee Lester ◽  
Christian Kollmannsberger ◽  
...  
Keyword(s):  
Prostate Cancer ◽  
Cancer Patients ◽  
Performance Status ◽  
Poor Performance ◽  
Abiraterone Acetate ◽  
Poor Performance Status ◽  
Castration Resistant Prostate Cancer ◽  
Castration Resistant

Dose-modified abiraterone acetate (AA) in men with metastatic castration-resistant prostate cancer (mCRPC): The Princess Margaret Cancer Centre (PM) experience.

2014 ◽  
Vol 32 (4_suppl) ◽  
pp. 61-61 ◽  
Author(s):  
Raya Leibowitz-Amit ◽  
Eshetu G. Atenafu ◽  
Jo-An Seah ◽  
Arnoud J. Templeton ◽  
Francisco Emilio Vera-Badillo ◽  
...  
Keyword(s):  
Prostate Cancer ◽  
Phase I ◽  
Low Dose ◽  
Abiraterone Acetate ◽  
Low Doses ◽  
Fasting State ◽  
Castration Resistant Prostate Cancer ◽  
High Fat ◽  
Castration Resistant ◽  
Psa Response

61 Background: AA prolongs survival in mCRPC and is used pre- and post-chemotherapy. In the phase I trial, AA showed anti-tumor activity at 250 or 500 mg daily (‘low doses’). In addition, pharmacokinetic analysis showed that when AA was administered with a high-fat meal vs the fasting state, drug exposure was increased by 4.4-fold [ Attard G et al. Phase I clinical trial of a selective inhibitor of CYP17, abiraterone acetate, confirms that castration-resistant prostate cancer commonly remains hormone driven. J Clin Oncol 2008; 26: 4563-4571.]. Based on this, at our cancer centre low-dose AA is sometimes prescribed with high-fat meals to men who otherwise cannot access the drug due to funding constraints, particularly in the pre-chemotherapy setting. Our aim was to study the association between AA dose, PSA response and progression-free survival (PFS). Methods: All men receiving AA at PM (Nov2009-Mar2013) were reviewed retrospectively. PSA response rate (PSA-RR) was defined according to PCWG2 criteria as a confirmed decrease ≥50% in PSA. PFS was defined from start of AA to PSA progression, clinical progression, drug cessation or death. Associations between dose, PSA-RR and PFS were assessed using chi-square and logrank tests, respectively, for all patients and for the sub-group of chemo-naive patients. Results: 109 men were treated with AA, 89 at a full dose of 1000 mg in the fasting state, 20 at low doses with high-fat meals. There was no significant difference in PFS between the two dose levels for all men. PSA-RR was non-significantly lower in chemo-naive men treated with low doses compared to full dose (p=0.09; table). Conclusions: Administration of low dose AA with high-fat meals is not associated with shorter PFS despite a trend to lower PSA-RR. These results are clinically relevant in resource-limited settings and warrant further prospective clinical research. [Table: see text]

Patient risk factors and pegfilgrastim use in cabazitaxel-treated prostate cancer pateints in an academic setting.

2014 ◽  
Vol 32 (4_suppl) ◽  
pp. 224-224
Author(s):  
Marina Dusevic Kaymakcalan ◽  
Sherri Stuver ◽  
Christopher Sweeney ◽  
Toni K. Choueiri ◽  
Aymen Elfiky
Keyword(s):  
Prostate Cancer ◽  
Risk Factors ◽  
Performance Status ◽  
Poor Performance ◽  
Prior History ◽  
Poor Performance Status ◽  
Castration Resistant Prostate Cancer ◽  
Exact Test ◽  
Potential Risk Factors ◽  
The Impact

224 Background: Cabazitaxel can offer a survival advantage in patients (pts) with metastatic castration resistant prostate cancer (mCRPC). Febrile neutropenia (FN) has emerged as a serious complication, with a rate of 8% in the TROPIC trial (de Bono, Lancet 2010). Prophylaxis with pegfilgrastim (P) can decrease the risk of FN, although predictors of FN continue to evolve. We performed an analysis on the effect of prophylactic P use on FN and the impact of certain risk factors on FN rates. Methods: We conducted a retrospective analysis of mCRPC patients treated with cabazitaxel from June 2010 to August 2013 at Dana-Farber Cancer Institute. Patient clinical and treatment variables were extracted. Fisher’s exact test was used to evaluate the association between potential risk factors and FN. Results: A total of 89 patients were treated at our institution and included in this analysis. All patients received at least one dose of cabazitaxel and received a mean of four cycles. Five pts (5.6%) developed FN; 3 out of 70 (4.3%) receiving P and 2 out of 19 (10.5%) not receiving P (p=0.3). Of the 24 patients that started cabazitaxel at a reduced dose, none developed FN. No toxic death was reported. Among several risk factors including P use, age older than 65, pre-existing neutropenia, prior chemotherapy, pre-existing infection, poor performance status, liver and renal dysfunction, and recent surgery, only a prior history of palliative radiation had a significant association with FN (p=.002). Conclusions: The rate of FN in a large academic practice is similar to what was reported in the TROPIC trial. Prior radiation may be a risk factor for FN in cabazitaxel-treated mCRPC patients. Other factors that may help better predict the risk of FN in different groups of patients receiving cabazitaxel must be identified.

The study of the treatment efficacy in metastatic castration-resistant prostate cancer of low dose abiraterone with food.

2020 ◽  
Vol 38 (15_suppl) ◽  
pp. e17571-e17571
Author(s):  
Kanta Makphanchareonkit ◽  
Thitiya Sirisinha Dejthevaporn ◽  
Dittapol Muntham ◽  
Phichai Chansriwong
Keyword(s):  
Quality Of Life ◽  
Prostate Cancer ◽  
Adverse Events ◽  
Low Dose ◽  
Standard Dose ◽  
Abiraterone Acetate ◽  
Castration Resistant Prostate Cancer ◽  
Castration Resistant ◽  
Psa Response

e17571 Background: Abiraterone acetate and prednisolone (AAP) + ADT has been approved for treatment metastatic castration-resistant prostate cancer (CRPC) in the standard dose 1,000 mg with fasting state. Data in Ramathibodi hospital showed patients who had treated with standard dose of Abiraterone acetate (AA); had PSA response 47.83%. Previous studies showed using low dose AA of 250 mg with food had the non-inferiority results in efficacy. AA was not be reimbursed in Thailand, so the ability to use a highly effective drug at a quarter of the dose, could help in patient accessibility to cancer treatments. We sought to test the hypothesis that low-dose AA with food would have the comparable activity in Thai CRPC patients in both of the pre-Docetaxel and post Docetaxel treatment groups, and exploring the quality of life (QOL) of these patients. Methods: An observational cohort enrolled newly diagnosed metastasis CRPC at Ramathibodi hospital from 1st Jan 2019 to 31st Dec 2019. Patients were assigned to AA (250mg) with actual daily life meal. We collected the data of serum PSA and the adverse events every 4 weeks for 4 months. The QOL data was collected with the EuroQoL (EQ-5D) questionnaire which were done at baseline and every 4 weeks. The primary end point was PSA response that defined as PSA decreased ≥ 50% from PSA level at baseline. The secondary endpoint were the depth of PSA change, QOL and adverse events by using Fisher's exact test and T-test. Results: 21 patients were enrolled. At 12 weeks, there were 11 patients (52.38%) achieved 50% PSA response and 6 patients (28.57%) achieved 90% PSA response. The adverse events occurred 23.8%, and mostly were mild grade. The adverse events were comparable with the historical data in standard dose of AA. Low dose AA has significantly shown the improvement in quality of life from baseline (p < 0.001), and especially the significant improvement in pre-Docetaxel subgroup. Conclusions: Low-dose AA with food has good efficacy in PSA response, adverse events and QOL. Moreover, low dose AA shows more efficacy especially in pre-Docetaxel mCRPC patients. Low dose AA may be helping in reducing cost of cancer care, enabling in delivering affordable cancer care and increasing value of treatment.

Prevention of docetaxel-associated febrile neutropenia with primary granulocyte colony-stimulating factors (GCSF) in Chinese metastatic hormonal-sensitive (mHSPC) and castration-resistant prostate cancer (mCRPC).

2020 ◽  
Vol 38 (6_suppl) ◽  
pp. 72-72
Author(s):  
Darren M.C. Poon ◽  
Kuen Chan ◽  
T.W. Chan ◽  
Bryan Ng ◽  
S Wai-kwan Siu ◽  
...  
Keyword(s):  
Prostate Cancer ◽  
Febrile Neutropenia ◽  
Performance Status ◽  
Poor Performance ◽  
Chinese Patients ◽  
Poor Performance Status ◽  
Castration Resistant Prostate Cancer ◽  
Increased Risk ◽  
Docetaxel Treatment ◽  
Life Threatening

72 Background: Plenty reports suggest Asian prostate cancer patients are more susceptible to docetaxel-related febrile neutropenia (FN). However, primary GCSF prophylaxis is currently not recommended by international guidelines for patients with mCRPC or mHSPC when docetaxel is administered. Therefore, we aim to evaluate the potential benefit of primary GCSF in preventing the potentially life-threatening FN for Chinese mHSPC and mCRPC treated with docetaxel. Methods: Two cohorts (2003-2012 & 2015-2018) that consisted of Chinese patients with mHSPC and mCRPC who had docetaxel at six public oncology centres in Hong Kong were grouped and analysed. Primary GCSF was defined as its administration within 5 days of beginning docetaxel, and its use was at the discretion of oncologists. The primary outcome was FN within 21 days of first cycle of docetaxel (1st FN). Multivariable regression analysis was used. Results: A total of 377 metastatic prostate cancer (mHSPC, n=100 (26%); mCRPC, n=277 (73%)) patients with docetaxel treatment was identified. Primary GCSF was given in 71 (18%) patients. The baseline characteristics were balanced between groups with and without primary GCSF. FN was happened in 61 patients (16%), with 37 (9%) of them at 1st cycle. Primary GCSF were administered in 2 and 69 patients with and without 1st FN, respectively (5.4% vs 20.3%, p=0.03). Primary GCSF was associated with reduced risk of 1st FN (odds ratio (OR), 0.22; 95% CI 0.05 - 0.96; p=0.04) in overall, and a similar trend was observed in both mHSPC (OR, 0.36; p=0.35) and mCRPC (OR, 0.16, p=0.08) subgroups. Besides, among various clinical parameters, poor performance status (ECOG 2-3) was associated with increased risk of 1st FN (OR, 3.90, 95% CI 1.66 – 9.13, p=0.002). Conclusions: Primary GCSF prophylaxis is suggested for Asian mCRPC and mHSPC patients, particularly those with poor performance status, to alleviate the risk of docetaxel-related febrile neutropenia.

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