title: Biosimilars: Rationale and current regulatory landscape.
abstract: OBJECTIVE
  To discuss current terminology and the regulatory standards and processes involved in the development of biosimilars.
  
  
  METHODS
  An Internet-based literature search through April 2015 was performed for information related to biosimilars in chronic inflammatory disorders. Keywords were as follows: biosimilar, development, manufacturing, characterization, structural, functional, preclinical, clinical, immunogenicity, rheumatoid arthritis, juvenile idiopathic arthritis, psoriasis, psoriatic arthritis, Crohn׳s disease, ulcerative colitis, and ankylosing spondylitis. The European Medicines Agency (EMA) and US Food and Drug Administration (FDA) websites were searched for guidelines and information related to biosimilars.
  
  
  RESULTS
  Biosimilars are products that are highly similar to the reference product regarding quality, biological activity, safety, and efficacy. Biosimilars are biological products and not generic drugs and, thus, do not follow the same regulatory pathways as generic molecules. Rigorous early-stage structural, functional, and analytical testing, followed by nonclinical and clinical analyses comparing a biosimilar with its reference product, are required to demonstrate biosimilarity in regulatory markets worldwide.
  
  
  CONCLUSIONS
  The addition of biosimilars to the market has the potential to improve access to biologic therapies. Many regulatory agencies have enacted stringent pathways, which must be followed for a biosimilar to be labeled and approved as such; following the pathways will help protect and maintain the integrity, quality, and safety of the biosimilar product.
authors.affiliation: Department of Internal Medicine, University of Nevada School of Medicine, 1707 W Charleston Boulevard, Suite 220, Las Vegas, NV 89102. Electronic address: eolech@unr.edu.
authors.forename: Ewa
authors.initials: E
authors.lastname: Olech
mesh_terms: D059451:Biosimilar Pharmaceuticals / Q000627:therapeutic use*; D055808:Drug Discovery / Q000331:legislation & jurisprudence*; D004345:Drug Industry / Q000331:legislation & jurisprudence*; D006801:Humans; D012216:Rheumatic Diseases / Q000188:drug therapy*; D014481:United States; D014486:United States Food and Drug Administration
chemical_list: D059451:Biosimilar Pharmaceuticals
keywords: Biologic; Biosimilar; Biosimilarity; Chronic inflammatory diseases; Development; Generics; Innovator; Nomenclature; Reference product; Regulatory guidance; Regulatory pathways; Small-molecule drugs