Oncology

Sandoz’s biosimilar filgrastim was first approved in Europe in 2009 under the name Zarzio (later, the same drug was approved as Zarxio in the United States). Since that time, the number of biosimilars approved for use in the oncology field has grown substantially, and a recent review says that the past decade of experience with biosimilar filgrastim underscores the strong scientific basis for the extrapolation of indications for biosimilars.

A new report released Monday by UnitedHealth Group finds that administering specialty drugs—which are typically injected or infused—in homes or in independent physician offices instead of hospitals could save as much as $4 billion each year.

Howard Burris, MD, FACP, FASCO, president of clinical operations and chief medical officer of Sarah Cannon Research Institute, discusses the adoption of oncology biosimilars.

China-based drug maker TOT Biopharm is developing TAB008 as a biosimilar of the reference bevacizumab, Avastin. TOT has recently indicated that it is in the midst of a phase 3 clinical trial of the biosimilar, and last month, results of a phase 1 study of the biosimilar were published in Frontiers in Pharmacology.

Drug maker Henlius Biotech is recruiting patients for a single-center, open-label, dose-escalation phase 1 clinical trial that will evaluate the safety and tolerability of combination therapy with a biosimilar bevacizumab and an anti–programmed cell death protein 1 (PD-1) antibody in patients with advanced solid tumors.

A new paper published this month may help to allay some concerns that US providers may have about using FDA-approved biosimilar rituximab.

Early dose reductions in the adjuvant chemotherapy combination of 5-fluorouracil, epirubicin, cyclophosphamide, and docetaxel negatively impacted survival rates for patients with intermediate- or high-risk breast cancer.

Administering the brand-name pegfilgrastim (Neulasta) via an on-body injection device (sold as Onpro) carries some risk of device failure, resulting in a missed or partial dose of pegfilgrastim. A recent cost simulation found that, when taking this failure into account, assured prophylaxis with biosimilar filgrastim offers the greatest cost efficiency.

“These results will fully usher the treatment of chronic lymphocytic leukemia [CLL] into a new era,” said Tait Shanafelt, MD, professor of medicine at Stanford. “It seems likely that, in the future, these patients will be able to forego chemotherapy altogether.”

The study in patients with non-Hodgkin lymphoma (NHL) is the second of a pair of studies intended to facilitate regulatory submissions for the proposed biosimilar.

When Samsung Bioepis’ trastuzumab biosimilar, SB3 (Ontruzant), gained regulatory approval in multiple highly regulated markets, it did so on the strength of a data package including evidence from a phase 3 study in patients with HER2-positive early breast cancer. Later, it became apparent that some of the patients who received the reference product in the phase 3 study had been exposed to lots of Herceptin with a marked shift in relative antibody-dependent cell-mediated cytotoxicity (ADCC) activity.

A recent study suggests that adding rituximab to a high‐dose methotrexate‐based combination chemotherapy could prolong overall survival as well as progression-free survival for patients with primary central nervous system lymphoma, a rare and aggressive form of lymphoma.

A recent study found that rituximab maintenance therapy provides no additional benefit for patients with diffuse large B‐cell lymphoma (DLBCL) who are in complete remission after receiving rituximab plus cyclophosphamide, doxorubicin, vincristine, and prednisone (R-CHOP) chemotherapy.

This week, researchers reported updated results from a post hoc subgroup analysis from the adjuvant period of treatment in the biosimilar’s phase 3 trial; these results, say the authors, demonstrate that the biosimilar, used in the adjuvant setting, has comparable efficacy and safety to the reference at 1 year.

In a one-page order filed last week, a panel of judges for the US Court of Appeals for the Federal Circuit denied Genentech’s motion for an injunction that would have blocked Amgen from selling its biosimilar bevacizumab, Mvasi, pending the outcome of an appeal.

This week, a pair of papers detailing the clinical program for the biosimilar appeared in Pharmacology Research and Perspectives.

A recent article described a quality improvement project at the oncology specialty pharmacy unit within the University of Chicago Medicine.

OneOncology, a national partnership of community oncology practices, says that its partner practices have begun treating patients with 2 anticancer biosimilars: Kanjinti, a trastuzumab biosimilar referencing Herceptin, and Mvasi, a bevacizumab biosimilar referencing Avastin.

The fact sheet is being released as Canada awaits the launch of additional anticancer biosimilars.

Mylan and Biocon announced this week that they have launched their biosimilar trastuzumab, Ogivri, in Australia. Ogivri, referencing Herceptin, is the first trastuzumab biosimilar to launch in the Australian marketplace and is listed on the nation’s Pharmaceutical Benefit Scheme.

JCR Pharmaceuticals, together with partner Kissei Pharmaceutical, is currently developing a darbepoetin alfa biosimilar, JR-131, referencing Aranesp. Darbepoetin alfa is used to treat anemia caused by chronic kidney disease or by chemotherapy.

Among the data that supported the biosimilar’s approval was a phase 3 study in patients with advanced nonsquamous non–small cell lung cancer. This week, researchers published detailed findings from that study.

The FDA has approved Pfizer’s rituximab biosimilar, Ruxience (rituximab-pvvr), referencing Rituxan. The biosimilar was approved to treat non-Hodgkin lymphoma, chronic lymphocytic leukemia, and granulomatosis with polyangiitis and microscopic polyangiitis.

Samsung Bioepis has announced that the European Medicines Agency (EMA) has accepted for review its market authorization application for SB8, a proposed bevacizumab biosimilar referencing Avastin.

Celltrion formed Vcell Healthcare Limited with Nan Fung Group with the aim of commercializing 3 biosimilars in China.

The first anticancer biosimilars have arrived on the US market. Amgen and Allergan have announced the launch of Mvasi, a bevacizumab biosimilar referencing Avastin, and Kanjinti, a trastuzumab biosimilar referencing Herceptin, in the United States.

Singapore-based Prestige BioPharma announced this week that its HD204, a proposed biosimilar bevacizumab product referencing Avastin, met its primary end point in a phase 1 study evaluating the pharmacokinetics (PK), safety, and immunogenicity of the biosimilar in comparison to its reference.

Spain-based drug maker mAbxience is developing a biosimilar rituximab, RTXM83. Last week, researchers reported findings from a head-to-head study of the proposed biosimilar versus its reference product as a first-line treatment for patients with diffuse large B-cell lymphoma (DLBCL).

With trastuzumab biosimilars expected on the US market soon for HER2-positive breast cancer, an advocacy organization for patients with breast cancer said recently that it wants to provide education about the potential of the medicines to lower costs and provide more treatment options.

The subcutaneously administered trastuzumab contains the same monoclonal antibody as the intravenous formulation at a dose of 600 mg per 5-mL vial, plus a recombinant human hyaluronidase, to be used every 3 weeks. The hyaluronidase is used to increase the permeability of the extracellular matrix, allowing for administration of higher volumes and enhanced absorption of the drug.