Biosimilars/Research
Canada’s biosimilar substitution policy: effects on competition and patient safety
A critical review of Canada’s biosimilar substitution policy [1] finds that the scheme has focused on economic factors over other elements such as therapeutic efficacy and market competition. The authors suggest that Canada could learn from the European market, where switching policies retain choice for physicians and patients and promote competition.
Multiple successive switches between infliximab biosimilars in IBD
Recently, biosimilar tumour necrosis factor (TNF) antagonists have become available and are being increasingly used in treating inflammatory bowel diseases (IBD), Crohn’s disease (CD) and ulcerative colitis (UC). The first infliximab biosimilar to receive approval was CT-P13 (Remsima) based on data from rheumatoid arthritis and ankylosing spondylitis, followed by extrapolation to other indications of originator infliximab (Remicade). The second infliximab biosimilar, SB2 (Flixabi), received authorization based on a pharmacokinetic study in healthy volunteers and a study in rheumatoid arthritis [1].
Different approaches to the interchangeability of biosimilars
The interchangeability of biosimilars can sometimes be an emotive subject. Despite reservations by prescribers, payers and patients, many countries have implemented policies allowing for the substitution of biologicals with biosimilars. However, there is still a lack of harmonization around the world when it comes to how different countries or regions approach the interchangeability of biosimilars [1].
Federal purchases of biological drugs for cancer in Brazil
Buying biosimilars is generally considered to be a way to increase access to cancer treatments in public health services. In Europe, the approval, commercialization and use of similar biotherapeutic products (SBPs) have been encouraged as a way to reduce costs and expand treatment coverage [1, 2]. In Brazil, an analysis of the profile of purchases of monoclonal antibodies (mAbs) acquired by the Unified Health System (SUS) between 2015 and 2019 showed that this premise might not be true in Brazil [2].
Clinical pharmacists have a critical role in increasing biosimilar uptake
The increasing global burden of chronic diseases, including cancers, diabetes, autoimmune disorders, anaemia of chronic renal failure, rheumatoid arthritis, multiple sclerosis, blood disorders and others, underscore the importance of patients’ access to safe and effective treatments. Interestingly, the introduction of biologicals in the 1980s revolutionized the treatment of these chronic diseases with better prognosis, although high costs and limited patient access remain challenges. These biologicals are known by various names, including biopharmaceutical agents, biologicals, biological therapies, biological agents and biological response modifier therapy or immunotherapy. Biologicals are derived or manufactured from a living biological system. With the majority of originator biologicals losing patent protection and the emergence of biosimilars, the landscape of biologicals is facing many changes.
Clinical development of biosimilars in the oncology setting
Biologicals as monoclonal antibodies (mAb) are highly complex products produced in living systems. They are included as treatment, combined with chemotherapy, for multiple common malignancies as cancer, in first- and second-line treatment regimens. However, the patient’s access to this type of treatment can be limited due to their high cost.
Knowledge and perceptions of naming for biosimilars in the US
The relatively recent introduction of biosimilars to the US market and the new naming convention for biopharmaceuticals prompted exploration of their impact in clinical practice. Naming guidance for new biological products and biosimilars was published by the US Food and Drug Administration (FDA) in 2017, which proposed the use of a core name followed by a 4-letter suffix devoid of meaning to facilitate pharmacovigilance [1]. In order to find out how this system was viewed by healthcare providers, researchers evaluated use of, knowledge about, perceptions of, and preferences for this naming convention in clinical practice [2]. Previous studies informed the hypothesis that healthcare providers would demonstrate knowledge gaps surrounding biosimilars and opinions regarding 4-letter suffix use would be inconsistent. This study aimed to understand the impact of the recent naming guidance in clinical practice.
New quality-range-setting method for biosimilarity assessment
Spanish researchers present a new method for the estimation of quality range (QR) bounds based on the variance components to account for both between-lots and within-lots variability; variance components are computed by the maximum likelihood method using a linear random model [1]. The authors have called this method QRML to differentiate it from the currently used procedure based on one sample per batch. For this, the molecular weight (Mw) and dimer content (expressed as percentage) were used as critical quality attributes (CQAs). Real data from seven batches of a commercial bevacizumab drug product were used.
Biosimilars in Europe: prescriber survey
A survey of European prescribers reveals a significant increase in familiarity with biosimilars since 2013 [1]. In addition, prescribers increasingly believe they should always have control of treatment decisions, including those to switch to a biosimilar.
Long-term safety and efficacy of anti-TNF-α biosimilars in psoriasis
Biologicals have greatly improved treatment options and outcomes for patients with moderate-to severe psoriasis. Despite being significantly more effective than conventional systemic agents for psoriasis, the high cost of biologicals may limit their use [1].
