Discovering Antigen-specific Monoclonal Antibodies using Single B Cell Screening

Introduction Since the approval of Orthoclone OKT3 in 1986, more than 100 monoclonal antibodies (mAbs) have been approved by the Food and Drug Administration (FDA) to treat a variety of diseases ranging from autoimmune disorders, infectious diseases, and cancer [1-2]. In the context of the current COVID-19 pandemic, it’s crucial that these biologics are developed rapidly and efficiently. Among various antibody discovery approaches, including hybridoma technology, single B cell screening is a powerful and efficient strategy for generating antigen-specific mAbs based on the direct amplification of the VH and VL regions encoding genes from single B cells [3-4]. Notably, single B cell screening has various advantages that include maintaining the naïve VH/VL pairing, requiring relatively few cells, and the ability to discover antibodies against challenging targets.

Single B Cell Screening Technologies Single B cell screening technologies have emerged and evolved rapidly ov…

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Anti-idiotype Antibodies: A Powerful Weapon for PK/ADA Assays

By Sino Biological

Therapeutic monoclonal antibodies have emerged as the fastest-growing class of therapeutics since the mid-1980s from the increasing number of pharmaceutical companies seeking more drug modalities to extend their pipelines. Additionally, biosimilars now have more opportunities to enter the market as patents of some blockbuster monoclonal antibodies begin to expire. Given this context, assessing the safety and efficacy of biotherapeutics has become imperative during the drug-development process. In particular, pharmacokinetic (PK) and anti-drug antibody (ADA) assays are conducted to study and evaluate new drug candidates and biosimilars. For PK/ADA assays, anti-idiotype antibodies (Anti-IDs) are powerful tools to measure the concentration of antibody drugs in patient samples and serve as positive controls for anti-drug antibodies (ADA).

Anti-IDs in Pharmacokinetic (PK) Assays

Pharmacokinetics (PK) describes and characterizes the four dif…

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