“Although modern immunotherapy has yet to have a breakthrough in prostate cancer to the degree it has had in lung cancer or urothelial carcinoma, combinations with anti–PD-1/PD-L1 agents are beginning to show promise for these patients in clinical trials.
“Currently ongoing is a phase II trial of durvalumab (Imfinzi) in combination with the PARP inhibitor olaparib (Lynparza) in patients with metastatic castration-resistant prostate cancer (mCRPC; NCT02484404). Investigators note that previous data have suggested that 25% to 30% of sporadic mCRPC has DNA-repair pathway defects. Results thus far have demonstrated that the synergy of durvalumab and olaparib proves that the combination may be a viable option for patients with mCRPC who are heavily pretreated. The trial is still accruing.”
“A combination of pembrolizumab (Keytruda) and trastuzumab, tested in patients with trastuzumab-resistant advanced HER2-positive breast cancer, was well tolerated and had clinical benefit in patients whose tumors were positive for a biomarker for pembrolizumab, according to data presented from the phase Ib/II PANACEA trial at the 2017 San Antonio Breast Cancer Symposium, held Dec. 5–9.
“ ‘We wanted to investigate if immunotherapy approaches can work in patients with advanced HER2-positive breast cancer that is resistant to trastuzumab,’ said Sherene Loi, MD, PhD, associate professor at Peter MacCallum Cancer Centre in Melbourne, Australia, working with the International Breast Cancer Study Group (IBCSG).”
“OncBioMune Pharmaceuticals, Inc. (OTCQB:OBMP) (“OncBioMune” or the “Company”), a revenue-stage biopharmaceutical company engaged in the development of a proprietary immunotherapy cancer vaccine technology, targeted cancer therapies and commercialization of a portfolio of products internationally, is pleased to provide the latest data from the Company’s successfully completed Phase 1 trial of ProscaVax for prostate cancer, suggesting a durable response 31 weeks post-therapy.
“In the Phase 1 clinical trial, hormone-naïve and hormone-independent recurrent prostate cancer patients with increasing prostate specific antigen (PSA) were treated with six intradermal injections of ProscaVax. ProscaVax is OncBioMune’s novel immunotherapeutic cancer vaccine consisting of a combination of prostate cancer associated PSA with the biological adjuvants interleukin-2 (IL-2) and granulocyte-macrophage colony-stimulating factor (GM-CSF).”
“Combination regimens—particularly with checkpoint inhibitors and chemotherapy—are showing promise for the treatment of patients with squamous non–small cell lung cancer (NSCLC).
“Beyond the May 2017 FDA approval of pembrolizumab (Keytruda) plus carboplatin/pemetrexed for nonsquamous patients regardless of PD-L1 status, researchers are turning their focus to immunotherapy combinations in squamous patients in ongoing clinical trials. For example, the randomized, open-label, phase III IMpower131 study is evaluating the safety and efficacy of atezolizumab (Tecentriq) in combination with carboplatin/paclitaxel or carboplatin/nab-paclitaxel (Abraxane) versus carboplatin/nab-paclitaxel in chemotherapy-naïve patients with stage IV squamous NSCLC (NCT02367794). The trial, which has a primary endpoint of progression-free survival, is expected to enroll 1021 patients.”
“Gut microbes can help or hinder cancer patients’ response to immunotherapy, two new studies suggested.
“In 112 melanoma patients undergoing anti-PD-1 immunotherapy, those with a high diversity of gut microbes had not yet reached median progression-free survival (PFS) after nearly 2 years, because less than half of them had progressed, while median PFS in the low-diversity group was 188 days (hazard ratio 3.57, 95% CI 1.02-12.52, P<0.05), said Jennifer Wargo, MD, of the MD Anderson Cancer Center in Houston, and colleagues.”
“Inovio Pharmaceuticals, Inc. (NASDAQ:INO) today initiated a phase 1b/2a immuno-oncology trial in patients with newly diagnosed glioblastoma (GBM) designed to evaluate cemiplimab (also known as REGN2810), a PD-1 inhibitor developed by Regeneron Pharmaceuticals, Inc.(NASDAQ:REGN), in combination with Inovio’s INO-5401 T cell activating immunotherapy encoding multiple antigens and INO-9012, an immune activator encoding IL-12.”
“While immunotherapy with programmed death receptor 1 (PD-1) inhibiting antibodies has revolutionized the treatment of non-small cell lung cancer (NSCLC), use of these agents comes at the cost of potential serious immune-related adverse events (irAEs). In melanoma, development of cutaneous irAEs, such as rash and vitiligo, during treatment with PD-1 inhibitors has been shown to be associated with survival benefit, suggesting that early onset of irAEs may predict treatment outcomes. However, in NSCLC, the predictive value of immunotherapy-related toxicity as a clinical marker for efficacy to PD-1 inhibition is unknown. A multi-institution retrospective study investigated the relation between the development of irAEs and efficacy of PD-1 inhibitors in 134 patients with advanced or recurrent NSCLC who received second-line treatment with nivolumab. The primary outcome for this analysis was progression-free survival (PFS) according to the development of irAEs in a 6-week landmark analysis.”
“Immunotherapy has led a transformation for melanoma care but combinations of anti–PD-1 and CTLA-4 agents are toxic and biomarkers are not available to help personalized treatment, calling for further research into less toxic and more effective options, according to a presentation by Caroline Robert, MD, PhD, at the 2017 World Congress of Melanoma.
“At this point, the only approved immunotherapy combination remains the PD-1 inhibitor nivolumab (Opdivo) and the CTLA-4 inhibitor ipilimumab (Yervoy). However, research into combination approaches is now focusing on triplets of anti–PD-1 therapies and new checkpoints, such as IDO. Additionally, ongoing research continues to search of a biomarker of response for immunotherapy in melanoma.”
“In a first-of-its-kind study, University of California San Diego School of Medicine researchers report that a blood sample, or liquid biopsy, can reveal which patients will respond to checkpoint inhibitor-based immunotherapies.
” ‘We can help predict response to immunotherapy by measuring the number of mutations in circulating tumor DNA using a simple blood test,’ said Yulian Khagi, MD, UC San Diego Moores Cancer Center fellow and first author. ‘Immunotherapy can result in serious side effects, and therefore being able to predict who will respond is important to mitigating potential risk to each patient.’ ”