What Are Biosimilars?
Biosimilars are copycat versions of expensive biotechnology drugs. Although technically these "biosimilars" are not called generic.
Quoted from an article @ Reuters in Jan 2011;"Because of the complexity of biotech drugs, which are produced through biological processes that generally involve recombinant DNA technologies, they are often called "biosimilars" rather than generic copies. Biotech drugs are usually made from living cell lines controlled by different manufacturers, it is impossible for generic companies to make identical copies as they do with simple chemical-based drugs, which do not require fresh clinical trials. Biosimilars of drugs like Amgen's white blood cell-booster Neupogen are already on the market in Europe."
Quoted from an article @ Reuters in Jan 2011;"Because of the complexity of biotech drugs, which are produced through biological processes that generally involve recombinant DNA technologies, they are often called "biosimilars" rather than generic copies. Biotech drugs are usually made from living cell lines controlled by different manufacturers, it is impossible for generic companies to make identical copies as they do with simple chemical-based drugs, which do not require fresh clinical trials. Biosimilars of drugs like Amgen's white blood cell-booster Neupogen are already on the market in Europe."
Braz J Infect Dis. 2012 Jun;16(3):232-6.
Therapeutic effectiveness of biosimilar standard interferon versus pegylated interferon for chronic hepatitis C genotypes 2 or 3.
Vigani AG, Gonçales ES, Pavan MH, Genari F, Tozzo R, Lazarini MS, Fais V, Feltrin A, Gonçales NS, Gonçales FL Jr.
Abstract
BACKGROUND: Pegylated interferon (Peg-IFN) and standard interferon (IFN) play a significant role in the treatment of hepatitis C virus (HCV) infection. Biosimilar standard IFN is widely available in Brazil for the treatment of HCV infection genotypes 2 or 3, but its efficacy compared to Peg-IFN is unknown.
OBJECTIVE:
To compare the sustained virological response (SVR) rates following treatment with biosimilar standard IFN plus ribavirin (RBV) versus Peg-IFN plus RBV in patients with HCV genotypes 2 or 3 infection.
METHODS:
A retrospective cohort study was conducted in patients with HCV genotypes 2 or 3 infection treated with biosimilar standard IFN plus RBV or with Peg-IFN plus RBV. SVR rates of the two treatments were compared.
RESULTS:
From January 2005 to December 2010, 172 patients with a mean age of 44 +/- 9.3 years were included. There were eight (4.7%) patients with HCV genotype 2 infections. One hundred fourteen (66.3%) were treated with biosimilar standard IFN plus RBV, whist 58 (33.7%) patients were treated with Peg-IFN plus RBV. Between the two groups, there were no significant differences regarding age, gender, glucose level, platelet count, hepatic necroinflammatory grade, and hepatic fibrosis stage. Overall, 59.3% (102/172) patients had SVR. In patients treated with Peg-IFN plus RBV, 79.3% (46/58) had SVR compared to 49.1% (56/114) among those treated with biosimilar standard IFN plus RBV (p = 0.0001).
CONCLUSION:
In patients with HCV genotypes 2 or 3 infection, a higher SVR was observed in patients receiving Peg-IFN plus RBV related to patients treated with biosimilar standard IFN plus RBV.
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