Efficacy and safety of prostate-targeted local therapy in patients with newly diagnosed oligometastatic prostate cancer: a systematic review and meta-analysis

ObjectiveThe androgen receptor-targeting drugs abiraterone acetate and enzalutamide have shown positive results as treatments for metastatic castration-resistant prostate cancer (mCRPC). Therefore, a meta-analysis was conducted to compare the efficacy and safety of abiraterone acetate and enzalutamide in patients with mCRPC.MethodsWe retrieved relevant articles from PubMed, Cochrane, and EMBASE published before December 31, 2020. Eleven articles were initially selected, and four phase III, double-blind, randomized controlled trials of abiraterone acetate and enzalutamide that involved 5199 patients with mCRPC were included. The end points were time to prostate-specific antigen progression (TTPP), according to the prostate-specific antigen working group criteria; overall survival (OS); and radiographic progression-free survival (rPFS).ResultsFour randomized, controlled clinical trials involving 5199 patients were included in this study. The results of the meta-analysis showed that compared with placebo alone, abiraterone significantly improved OS (HR=0.69, 95% CI: 0.60-0.8, P<0.00001), rPFS (HR=0.64, 95% CI: 0.57-0.71, P < 0.00001), and TTPP (HR=0.52, 95% CI: 0.45-0.59, P < 0.00001) in patients with mCRPC. Compared with placebo, enzalutamide significantly improved OS (HR=0.67, 95% CI: 0.59-0.75, P<0.00001), rPFS (HR=0.33, 95% CI: 0.29-0.37, P< 0.00001), and TTPP (HR=0.19, 95% CI: 0.17-0.22, P < 0.00001). An indirect comparison was performed to compare the efficacy of abiraterone and enzalutamide. The results showed that there was no significant difference between abiraterone and enzalutamide with regard to improving the OS of patients with mCRPC (HR=1.03, 95% CI: 0.854-1.242). Enzalutamide was superior to abiraterone with regard to improving rPFS in patients with mCRPC (HR=0.516, 95% CI: 0.438-0.608). With regard to improving TTPP, the efficacy of enzalutamide was better than that of abiraterone (HR=0.365, 95% CI: 0.303-0.441). In sAE, there was no difference between abiraterone and enzalutamide (P=0.21, I2 = 38%).ConclusionsCompared with placebo, both abiraterone and enzalutamide significantly prolonged OS, rPFS, and TTPP in patients with mCRPC. There was no difference in safety between abiraterone and enzalutamide. In addition, enzalutamide had better efficacy than abiraterone with regard to improving rPFS and TTPP but not OS, but the level of evidence was low. Therefore, a large direct comparison trial is needed to compare the efficacy of the two drugs.Systematic Review RegistrationPROSPERO, identifier (CRD42021226808)

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Efficacy and Safety of Autologous Stem-Cell Transplantation as Part of First-Line Treatment for Newly Diagnosed Primary Central Nervous System Lymphoma: A Systematic Review and Meta-Analysis

Frontiers in Oncology ◽

10.3389/fonc.2021.799721 ◽

2022 ◽

Vol 11 ◽

Author(s):

Jing Liu ◽

Jiayuan Guo ◽

Xuefei Sun ◽

Yuanbo Liu ◽

Chunji Gao

Keyword(s):

Systematic Review ◽

Central Nervous System ◽

Nervous System ◽

Stem Cell ◽

Stem Cell Transplantation ◽

Prospective Studies ◽

Meta Analysis ◽

Central Nervous System Lymphoma ◽

Newly Diagnosed ◽

Efficacy And Safety

ObjectiveThe reviewed literature supports a treatment regimen for primary central nervous system lymphoma (PCNSL) that includes induction chemotherapy, followed by one consolidation therapy. High-dose chemotherapy supported by autologous stem-cell transplantation (ASCT) is the most studied option, but its effects are controversial. The aim of this study was to evaluate the efficacy and safety of ASCT for newly diagnosed PCNSL by means of a meta-analysis.MethodsThe PubMed, Embase, and Cochrane Library databases were systematically searched for studies published until May 20, 2021. Included studies were prospective studies of patients with newly diagnosed PCNSL treated with ASCT. The pooled rates and 95% confidence intervals (CIs) were determined for all outcomes. Subgroup analysis was conducted to compare the relative risk (RR) with 95% CIs for the complete remission (CR) rate and the hazard ratios (HRs) with 95% CIs for progression-free survival (PFS) and overall survival (OS).ResultsThirteen prospective studies including 348 patients were analyzed. The pooled CR rate, overall response rate, and relapse rate were 80% (95% CI, 71–88%, I2 = 67.06%, p = 0.00), 95% (95% CI, 87–100%, I2 = 73.65%, p= 0.00), and 19% (95% CI, 15–24%, I2 = 76.18%, p = 0.00), respectively. The pooled 2- and 5-year PFS and OS rates were 74% (95% CI, 68–80%, I2 = 3.90%), 65% (95% CI, 51–77%, I2 = 74.61%), 80% (95% CI, 72–88%, I2 = 57.54%), and 69% (95% CI, 53–83%, I2 = 83.89%), respectively. Hematological toxicity and infections were more common adverse events above grade 3. The pooled treatment-related mortality was 3% (95% CI, 1–6%, I2 = 28.18%, p = 0.16). In the group analysis of ASCT compared with whole-brain radiotherapy, there were no significant differences in the CR rate (RR, 1.00, 95% CI, 0.88–1.14, p = 0.971), relapse rate (RR, 0.44, 95% CI, 0.06–3.10, p = 0.408), PFS (HR, 1.28, 95% CI, 0.81–2.01, p = 0.29), or OS (HR, 1.62, 95% CI, 0.97–2.69, p = 0.06). Cognitive functions were preserved or improved after ASCT.ConclusionsASCT is a feasible approach for consolidation with good tolerability for newly diagnosed PCNSL patients. High-quality randomized controlled trials are still needed to confirm the effects of ASCT.Systematic Review Registrationhttps://www.crd.york.ac.uk/prospero/, identifier CRD42021268422.

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The Prognostic Association of Prostate MRI PI-RADS v2 Assessment Category and Risk of Biochemical Recurrence after Definitive Local Therapy for Prostate Cancer: A Systematic Review and Meta-analysis

The Journal of Urology ◽

10.1097/ju.0000000000001821 ◽

2021 ◽

Author(s):

Pawel Rajwa ◽

Keiichiro Mori ◽

Nicolai A. Huebner ◽

Darryl T. Martin ◽

Preston C. Sprenkle ◽

...

Keyword(s):

Prostate Cancer ◽

Systematic Review ◽

Biochemical Recurrence ◽

Meta Analysis ◽

Local Therapy ◽

Prostate Mri ◽

Prognostic Association

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The Effect of Local Therapy on M1c Prostate Cancer Patients: A Systematic Review and Meta-Analysis

Frontiers in Surgery ◽

10.3389/fsurg.2021.648676 ◽

2021 ◽

Vol 8 ◽

Author(s):

Zhenghao Wang ◽

DeHong Cao ◽

Wuran Wei

Keyword(s):

Prostate Cancer ◽

Systematic Review ◽

Radiation Therapy ◽

Selection Process ◽

Meta Analysis ◽

Local Treatment ◽

Local Therapy ◽

Cochrane Library ◽

Significant Heterogeneity ◽

Conformal Radiation Therapy

Background: A systematic review and meta-analysis was conducted to explore the effect of local treatment (LT) on overall survival (OS) and cancer-specific mortality (CSM) for patients diagnosed with M1c prostate cancer (PCa).Methods: PubMed, Web of Science, Embase, EBSCO, and Cochrane library databases (updated November 2020) were searched for studies assessing the effect of LT on patients with M1c Pca. The search strategy and study selection process was managed according to the PRISMA statement.Results: Four cohort respective studies were identified for satisfying the inclusion criteria. Our results indicated that LT significantly improved CSM (HR = 0.36, 95% CI = 0.22–0.60; P < 0.0001) and OS (HR = 0.42, 95% CI = 0.24–0.77; P = 0.004). Subgroup analysis showed that radical prostatectomy (RP) and radiation therapy (RT) including brachytherapy (BT), conformal radiation therapy (CRT), and intensity modulated radiation (IMRT) had a significant benefit on cutting down the CSM of M1c PCa patients (HR = 0.27, 95% CI = 0.13–0.56; P = 0.0005 and HR = 0.42, 95% CI = 0.20–0.89; P = 0.02). In addition, RP had improved the OS for patients (HR = 0.33, 95% CI = 0.15–0.73; P = 0.008). There was no difference of OS in patients that underwent RT (HR = 0.58, 95% CI = 0.24–1.40; P = 0.23). No significant heterogeneity was among the results, indicating consistency in the study.Conclusions: Present meta-analysis indicates that LT for M1c PCa correlated with decreased CSM and enhanced OS. The survival benefit of RP was successfully confirmed and the advantage of RT seemed to be associated with the tumor burden and method of RT.

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