What is known and objective: To evaluate the effects of statin use on the treatment outcomes (i.e. overall survival and cancer-specific survival) among advanced prostate cancer (PCa) patients treated with androgen deprivation therapy (ADT) or abiraterone/enzalutamide. Methods: The original studies, examining the effects of statins on the outcomes (i.e. overall survival and cancer-specific survival) among PCa patients treated with ADT or abiraterone/enzalutamide, were identified through a systematic search by two independent reviewers in the PubMed, Cochrane, Embase, American Society of Clinical Oncology and European Society of Medical Oncology databases. Databases were searched using keywords (abiraterone OR enzalutamide OR androgen deprivation therapy) AND statin. In total, nine eligible studies from 111 references were included for final analysis.Results and discussion: Statin use significantly lowered the risk of all-cause mortality (100 709 patients, HR = 0.73, 95%CI = 0.64-0.83, P < .00001) and the risk of cancerspecific mortality (100 343 patients, HR = 0.64, 95% CI = 0.53-0.77, P < .00001) in advanced PCa patients treated with ADT. The sensitivity analysis showed that the results were reliable. However, it could not generate reliable evidence in patients with metastatic castration-resistant prostate cancer (mCRPC) treated with abiraterone/ enzalutamide, as relevant studies were limited and had inconsistent results.

Purpose: It is hard for clinicians to choose the best regimen for pneumocystis jirovecii pneumonia (PJP) prophylaxis. The aim is to evaluate the effectiveness and safety of thrice weekly double strength (TWDS) vs daily single strength (DSS) trimethoprim-sulfamethoxazole (TMP-SMX) for prophylaxis of PJP after kidney transplantation. Methods: Adult renal transplant recipients (RTRs) who were transplanted between January 1, 2015 and July 1, 2018 were evaluated. A total of 189 RTRs were prescribed PJP prophylactic regimen during the study period (TWDS group: n=98; DSS group: n=91). Results: Morbidity due to PJP infection was significantly higher in TWDS group as compared with DSS group (8.60% vs 1.14%, p= 0.021). There was a significant trend toward higher prevalence of confirmed PJP (log‐rank=0.021) in TWDS group. The use of DDS TMP-SMX for prophylaxis after kidney transplantation was associated with a 79% reduction in the incidence of PJP comparing the prophylactic regimen of TWDS. There was no significant difference between the two groups in the overall rate of premature TMP-SMX discontinuation and laboratory indexes. Conclusion: Six months of DSS TMP-SMX prophylaxis was more effective than TWDS TMP-SMX regimen with the same safety profile.

Dysregulation of the immune checkpoints has been identified as one of the mechanisms tumor cells employ for immune escape. Human papillomavirus (HPV) plays an important role in the etiology of one subset of Head and Neck Squamous Cell Carcinomas (HNSCC). Recent studies reported that PD-1/PD-L1 pathway may be correlated with HPV-associated HNSCC. The degree of PD-L1 expression has been reported to be increased in those patients with HPV-positive disease. Also, PD-L1 expression in HNSCC was observed in the primary, recurrent, and metastatic disease setting. However, the clinicopathological implications associated with PD-L1 in HNSCC, as well as in disease metastasis, remain largely unclear. Using immunohistochemistry (IHC) and In situ hybridization (ISH) on VENTANA BenchMark ULTRA automated stainers, 40 cases of HNSCC, with matching primary and metastatic cancer stages, were evaluated for expression of PD-L1, p16, a surrogate marker of transforming HPV infections, and presence of HPV. Formalin-fixed paraffin-embedded tumor samples were subjected to PD-L1- and p16-IHC as well as HPV-ISH. A potential association between PD-L1 expression and HPV status among primary tumors and matched metastases was analyzed. Our data show that expression of PD-L1 or p16 is concordant in the majority of HNSCC primary vs metastatic tumor cases tested. Agreement rate of p16 expression among 40 case pairs of primary vs metastatic tumor was 88.2% with a 95% Confidence Interval (CI) of (73.4-95.3). PD-L1 expression was 76.9% (61.7-87.4) concordant among the 40 case pairs. Agreement rate between PD-L1 and p16 was 77.1% (61.0-87.9) in primary cases and 51.3% (35.9-66.6) in metastatic cases. No obvious association between PD-L1 and p16 expression was observed. Citation Format: Chenglu C. Quon, Xiaoling Xia, Lupe Manriquez, Crystal Schemp, Dawn Sloane, Shahad Alabagi, Mohammed G. Abdelwahab, Pengfei Gu, Lizhen Pang, Khalid Hanif, Nicole Schechter. Correlation of PD-L1 expression and HPV status among primary and metastasized HNSCC tumors. [abstract]. In: Proceedings of the 107th Annual Meeting of the American Association for Cancer Research; 2016 Apr 16-20; New Orleans, LA. Philadelphia (PA): AACR; Cancer Res 2016;76(14 Suppl):Abstract nr 477.