Oncology

Trastuzumab competition in the European market is heating up, as Mundipharma announced yesterday that it has officially launched Celltrion’s biosimilar, Herzuma.

A case series was recently published in CNS Oncology that investigated whether adult pilocytic astrocytoma—a rare and highly vascular tumor—is responsive to bevacizumab treatment.

Pfizer announced this morning that the FDA has issued a Complete Response Letter for PF-05280014, a proposed trastuzumab biosimilar referencing Herceptin.

Last time on the podcast, we spoke with a practicing rheumatologist about his experience with biosimilars so far, but one of the most exciting prospects on the biosimilars horizon is the market entry of 2 approved anticancer biosimilars: trastuzumab and bevacizumab. This week, we’re delving into the world of supportive care and anticancer biosimilars with an oncology expert, Robert M. Rifkin, MD, FACP.

During a session at the 2018 Community Oncology Conference, hosted by the Community Oncology Alliance April 12-13 in National Harbor, Maryland, Robert M. Rifkin, MD, FACP, medical director of biosimilars at McKesson Specialty Health, The US Oncology Network, highlighted the opportunities biosimilars provide to increase access to drugs while decreasing costs, but also the remaining barriers to adoption.

Kashyap Patel, MD, CEO of Carolina Blood and Cancer Care, told The Center for Biosimilars® in an interview that, as his practice has begun to implement the Oncology Care Model, it has moved 100% of its patients to biosimilar filgrastim, Zarxio, from the reference filgrastim, Neupogen.

Researchers demonstrated that trastuzumab increased progression-free survival (PFS) in patients with uterine serous carcinoma.

A recent study concludes that both hypertension and proteinuria, which are considered to be interrelated with the pharmacological action of bevacizumab, have the potential to indicate greater likelihood of therapeutic efficacy.

Today, Celltrion announced that the FDA has issued Complete Response Letters (CRLs) for 2 of its products, CT-P10, a proposed rituximab biosimilar referencing Rituxan, and CT-P6, a proposed trastuzumab biosimilar referencing Herceptin.

In a recently published study, researchers sought to determine the cost effectiveness of bevacizumab in treating recurrent ovarian cancer from a Canadian public payer perspective.

Linda Frisk, PharmD, of Arizona Oncology, discusses biosimilars and cost savings.

March 2018 saw a variety of developments for biosimilars in cancer care, both in the United States and abroad.

Eflapegrastim is novel long-acting granulocyte-colony stimulating factor therapy. Pharmacokinetic analysis in vivo demonstrated a 2- to 3-fold increase in area under the time‐concentration curve for absolute neutrophil count versus pegfilgrastim when administered at similar doses, and the proposed drug demonstrated comparable efficacy compared with pegfilgrastim in an open-label study in patients with breast cancer who were receiving docetaxel and cyclophosphamide.

During a symposium held during the 23rd annual conference of the National Comprehensive Cancer Network (NCCN), held last week in Orlando, Florida, Andrew D. Zelenetz, MD, PhD, of Memorial Sloan Kettering Cancer Center; Jeffrey Crawford, MD, of Duke University; and Lee Schwartzberg, MD, FACP, of University of Tennessee Health Science Center, presented on the use of biosimilars in oncology.

Howard Cohen, RPh, MS, FASHP, director of oncology pharmacy services for Yale New Haven Hospital, discusses using biosimilar filgrastim.

Rituximab induction therapy has the highest probability of cost effectiveness in treating newly diagnosed patients with asymptomatic advanced follicular lymphoma, according to a study published in the British Journal of Haematology.

More than 90% of Indian patients with diffuse large B-cell lymphoma (DLBCL) treated from 2014 to 2015 had access to rituximab due to the biosimilar’s availability.

Patients without comorbidities who received subcutaneous trastuzumab with their chemotherapy and endocrine therapy showed a significant improvement in emotional function, and reported that they were less upset by hair loss than the patients in the control group.

Merck, operating under the trade name MSD in the European Union, announced today that it has launched Samsung Bioepis’ biosimilar trastuzumab, Ontruzant, in the United Kingdom.

To determine whether a course of 300 ug of filgrastim, administered daily for 2 days, achieves the same clinical outcomes that have been reported with the recommended dosage, and whether such a dose could provide cost savings, investigators from Marshall University performed a retrospective chart review to identify all patients at their institution with chemotherapy-induced neutropenia who were treated with 2 consecutive doses of 300 ug of filgrastim between September 2011 and September 2016.

In an effort to evaluate whether switching from a reference biologic to a biosimilar could lead to altered clinical outcomes—such as enhanced immunogenicity, compromised safety, or reduced efficacy—a research team, led by Hillel Cohen, PhD, conducted a systematic literature review of all available switching studies.

This week, Amgen announced that the European Medicines Agency’s (EMA) Committee for Medicinal Products for Human Use (CHMP) has issued a positive opinion recommending a label variation for its reference pegfilgrastim to now include the branded Neulasta Onpro Kit.

India-based drug manufacturer Cadila Healthcare has announced that it is planning to file a Biologics License Application (BLA) for its biosimilar pegfilgrastim with the FDA by the end of 2019. To date, no developer has been successful in gaining regulatory approval in the United States or European Union for a biosimilar of the reference pegfilgrastim.

Treatment with rituximab plus a regimen of cyclophosphamide, doxorubicin, vincristine, and prednisone (CHOP) for patients with diffuse large B-cell lymphoma (DLBCL) has proven efficacy in clinical trials, few long-term data are available for the use of this combination in patients in a real-world setting.

Because tumor necrosis factor-alfa (TNF) has been identified as possessing tumor-promoting properties in multiple malignant tumors, anti-TNF therapies have been proposed as a potential combination treatment that could enhance the effects of chemotherapy in patients with colon cancer.

In an animal model of bleomycin-induced lung toxicity, filgrastim increased alveolar neutrophil recruitment, pulmonary edema, and lung myeloperoxidase activity. That finding led to concerns about whether filgrastim could increase pulmonary toxicity when used together with adriamycin, bleomycin, vinblastine, and dacarbazine regimens.

An editorial recently published in The BMJ discusses addresses 1 of the most commonly misunderstood biosimilar concepts: extrapolation.

This week, the American Society of Clinical Oncology (ASCO) released a new statement that seeks to offer clinicians guidance on the use of biosimilars in oncology as a wave of patent expirations is expected to bring more anti-cancer and supportive care biosimilars to the US market.

A study recently published in the European Journal of Hematology reports diffuse large B-cell lymphoma (DLBCL)–specific findings from MONITOR-GCSF, a pan-European, multicenter, prospective, observational study that attempts to describe the treatment patterns and clinical outcomes of patients who received biosimilar filgrastim in the prophylaxis of chemotherapy-induced neutropenia and febrile neutropenia.

Hope Rugo, MD, director of the breast oncology clinical trials program at the University of California at San Francisco, disucusses the conversations she is having and expects to have with fellow prescribers about biosimilars in oncology.