Biopharmaceutical products represent up to 20 percent of the total pharmaceutical market and are growing at a rate of nearly eight percent annually. To keep up with this impressive growth rate, many contract development and manufacturing organizations (CDMOs) are making strategic investments in equipment and expertise to support analytical development and structural characterization of biopharmaceuticals in more economical and efficient ways.^[1]

Unlike small molecule active pharmaceutical ingredients (APIs) that exist as a single chemical entity, biologics nearly always exist as a mixture of molecules. Different molecules can arise from numerous sources including N-terminal variants, post-translation modifications (PTMs), glycoforms, and degradation products. Due to the potentially high amount of heterogeneity in the biologic, it is critical to demonstrate control over the drug substance (DS) manufacturing process from fermentation to purification and protein re-folding. Characterization of the various molecules is the first step in demonstrating process control. High-resolution mass spectrometry is a key component in the characterization of novel biologics and biosimilars.

The US Pharmacopeia (USP) retired the existing wet chemistry heavy metals methods outlined in USP General Chapter <231> with an instrument-based approach on January 1, 2018. Though the existing wet chemistry methods have been in effect for nearly 100 years, the methods were non-specific and frequently failed to detect or underestimate the presence of some toxic elements that are potentially present in pharmaceutical ingredients. 

Throughout this guidebook, Alcami scientists will discuss heavy metal regulations, moving to a risk-based approach, the role of risk assessment in the manufacturing process, goals and accountability, and agency-accepted testing and filing strategy for elemental impurities. 

The US Orphan Drug Act of 1983 characterizes an orphan disease as a rare medical condition that affects a population of fewer than 200,000 people. Rare diseases have various causes— most notably, genetics. However, the National Institutes of Health (NIH) states, “many rare diseases, including infections, some rare cancers, and some autoimmune diseases, are not inherited. While researchers are learning more each year, the exact cause of many rare diseases is still unknown” (NIH, 2017).

The term “orphan disease” resulted from pharmaceutical companies not having the resources to design and scale up formulations to treat these diseases, due to the lack of financial support for such highly specialized programs. The Orphan Drug Act (ODA) allows for the necessary financial backing of pharmaceutical companies to develop treatments for rare diseases (NIH, 2017), giving special status to a drug or biological product (drug) upon request of a sponsor. This status is referred to as orphan designation or orphan status.