A review of treatments targeting DNA-repair gene defects in metastatic castration resistant prostate cancer

Prostate cancer is the most common cancer in men. About 6% of those diagnosed will develop metastatic disease. Unfortunately, metastatic prostate cancer is fatal. Prostate cancer can be castration sensitive or castration resistant. Many treatments have been shown to improve progression free survival and overall survival in metastatic castration resistant prostate cancer (mCRPC). In recent years, studies have been exploring targeting mutations in the DNA Damage Repair (DDR) response that may amplify oncogenes. In this paper, we aim to discuss DDR, new approved targeted therapies, and the most recent clinical trials in the setting of metastatic CRPC.

Improving oral chemotherapy compliance and documentation in a safety-net oncology clinic

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Background: Barriers to safe delivery of oral chemotherapy in a safety net hospital population include lack of health insurance, delays in medication delivery, and language barriers. Baseline chart review at the Lyndon B. Johnson Hospital oncology clinic revealed sparse documentation of oral chemotherapy education and compliance. Our team conducted the present quality improvement project to improve documentation of toxicity assessment, patient education, and compliance with the oral chemotherapy agents capecitabine, palbociclib, and sorafenib by 25% from October through December 2020. Methods: A set of standardized questions designed to assess for the above domains were generated in the form of an auto-populated electronic medical record phrase ("dot phrase," see Figure 1). Using weekly timed email notifications, physicians were reminded to incorporate these questions in their documentation during clinic visits. Chart review was performed to assess usage frequency of the dot phrase. A post-intervention survey was administered to assess providers' experience with use of the dot phrase, and assess barriers to consistent documentation. Results: 41 patients over 3 months were identified as taking the oral chemotherapy drugs capecitabine (68%), palbociclib (29%) or sorafenib (3%). 63% were non-English speakers. 49% had breast cancer, 39% GI cancers, and 12% other cancers. 12% of clinic visits correctly incorporated use of the dot phrase. Education on the dosing and schedule for oral chemo was addressed for 48% of patients, documentation of adverse effects was performed for 34% of patients, and assessment of medication adherence was documented for 22% of patients. While 73% of providers felt that documentation of oral chemotherapy compliance is important, 70% cited failure to remember to incorporate the dot phrase in real time as the primary reason for failure to use the dot phrase for oral chemotherapy documentation. Conclusions: Despite providers' view of documentation of oral chemotherapy toxicities and compliance as important, low uptake of the dot phrase was observed. The main barrier to use of the dot phrase was providers' forgetting to incorporate the dot phrase prior to and during their clinic charting. Future efforts should focus on automated reminders and regular assessments to increase compliance to this important quality domain. [Table: see text]

Protracted complete response after limited checkpoint inhibitor dosing: A case report

Immunotherapy is an important modality in the treatment of many types of malignancy. The optimal duration of treatment with immunotherapy in patients with metastatic malignancies who experience complete responses is not fully understood. Our case demonstrates a protracted complete response in a patient with metastatic gastric adenocarcinoma after just three doses of pembrolizumab. This illustrates a need for further research into which patients might have responses such as these and could therefore be spared additional doses of an expensive treatment with many potential side effects.