Our immune system can be conceptualized as a balance-scale in providing appropriate responses against invading pathogens and tumor cells on the one hand, while limiting collateral damage to healthy cells, known as “autoimmunity”, on the other. When the aggressive response is inappropriately met with regulatory mechanisms, autoimmunity may occur, resulting in serious disorders such as lupus, rheumatoid arthritis and type 1 diabetes, and where the balance favors immunosuppression, cancers can thrive.
Immuno-oncology (IO) leverages the body’s own immune system to fight cancer and is revolutionizing the way we think about medicine because it is enabling long-term remission or in some cases “cures” to cancer patients. Common IO approaches involve antibody modulation of T-cells by various mechanisms, for example targeting T-cell checkpoints such as CTLA-4, PD-1, and PD-L1, redirecting T-cells via bispecifics antibodies or replenishing the immune system with “super-charged” T-cells, known as chimeric antigen receptor T-cellular (CAR-T) therapies. The clinical portfolio of antibodies in this space is diverse in format, engineering, and target, and requires deep knowledge of the mechanism of action (MOA) to ensure its safety and efficacy.
Carterra’s LSA provides a highly parallel way of screening hundreds of antibody binding interactions at once in terms of their binding kinetics, affinity, and epitope specificity. These binding properties underpin an understanding of antibody’s MOA and as such, are used as metrics to triage an antibody library to leads.
Pain is caused by a complex interplay of physiological and psychological factors and managing pain is a clinical and economic burden on society. It is estimated that chronic pain affects 100 million adults in the USA, more than heart disease, cancer and diabetes combined. While opioids are one of the most widely prescribed painkillers for chronic pain, opioid abuse, addiction, and overdose pose serious public health concerns in the USA. Opioids are small molecule drugs that easily penetrate the blood-brain-barrier (BBB), where they alter neurobiochemical pathways in destructive ways, causing dependence and lethal addiction.
Monoclonal antibodies are providing attractive alternatives to traditional small molecule therapies for treating chronic pain based on their high affinity and exquisite specificity that can minimize the unwanted off-target binding and adverse side-effects that seriously limit small molecule approaches. Due to their hydrophilicity and large molecular size, antibodies barely cross the BBB, so do not cause the lethal addictions of small molecule drugs. While the large size of antibodies limit their bioavailability via oral administration, necessitating injection via intravenous, intramuscular, or subcutaneous routes, this inconvenience to patients is somewhat offset by the naturally long serum exposure of antibodies, allowing for less frequent dosing, with some therapeutic antibodies requiring only a single injection per three months. From a practical perspective though, the high cost of developing and manufacturing therapeutic antibodies remains a major hurdle.
Therapeutic antibodies under clinical investigation and on the market aimed at treating chronic pain target a variety of molecules associated with pain pathways, including calcitonin gene-related peptide (CGRP), ion channels, nerve growth factor (NGF), tumor necrosis factor-alpha (TNF-alpha), and epidermal growth factor receptor (EGFR). Understanding how we can explore different mechanisms for treating pain is essential to bringing new medicines to market. Currently it takes about 12 years to progress a therapeutic antibody from bench to market, and antibodies for treating chronic pain are scrutinized in long and rigorous clinical trials.
The Carterra LSA is a high throughput screening and characterization tool for measuring antibody binding interactions, enabling the analysis of hundreds of interactions at once. By delivering high quality data quickly in the assessment of key binding parameters such as kinetics, affinity, and epitope specificity it can speed up research and ultimately help to converge upon clinically-ready leads faster.
Autoimmune disease encompasses a range of disorders with the hallmark of an over-active immune system that launches a misdirected attack of auto-antibodies or inflammatory responses towards healthy cells. Some autoimmune diseases damage a specific organ, such as the pancreas in type 1 diabetes, the gastrointestinal tract in Crohn’s disease, or the skin in psoriasis, whereas others cause collateral damage to the entire body, such as lupus, multiple sclerosis and rheumatoid arthritis.
Therapeutic antibodies have proved highly successful in treating a variety of autoimmune diseases, as demonstrated by Humira (adalimumab), one of the biggest blockbuster drugs of all time. Like several other anti-inflammatory antibodies on the market, Humira targets and blocks tumor necrosis factor alpha (TNF-alpha), which relieves the pain and inflammation associated with some autoimmune diseases. Discovering “the next Humira” requires deep knowledge of biology to understand how to target other pathways relevant to autoimmune disease beyond TNF-alpha, such as T- and B-cell viability or activation, IL-1, IL-6, IL-17, and others. Understanding a drug’s mechanism of action (MOA) underpins the clinical success of any drug program.
Carterra’s LSA is a high throughput analytical platform that accelerates the screening and detailed characterization of large antibody libraries in terms of their binding kinetics, affinity and epitope specificity to provide crucial information about antibody binding properties that are used to assess and converge upon the most promising clinical candidates.
In jawed vertebrates, antibodies have evolved in nature to fulfill the role of eliminating invading pathogens by binding to them and neutralizing their activity. Since antibodies naturally often achieve high affinity and exquisite specificity, they are appealing to use in a therapeutic setting to fight infectious diseases. Several companies have sponsored the use of therapeutic antibody cocktails to provide medicines to individuals that have been infected with deadly viruses such as HIV, Ebola, yellow fever, Staph A, and the flu. Therapeutic cocktails comprise a collection of antibodies targeting several distinct epitopes to collectively achieve a broad neutralization of the virulence factor. Defeating an ever-mutating virus poses challenges in designing an effective medicine but targeting multiple epitopes at once can offset biological redundancy – when one pathway fails, another often compensates.
Carterra’s LSA facilitates epitope characterization on hundreds of antibodies in parallel, allowing you to quickly understand the epitope coverage of your antibody library and focus resources on studying the epitope clusters with the most biologically-relevant function. When epitope binning studies are performed on a large panel of antibodies, the competition picture gains resolution and nuance, allowing a deep appreciation of the epitope diversity contained in the antibody library. Developing a potently neutralizing therapeutic antibody cocktail relies on the proper selection of antibodies with complementary epitopes. The Carterra LSA can accelerate the epitope characterization of an antibody library, such as one that is recovered by B-cell cloning of an Ebola survivor, to understand the immune response and guide the discovery of therapeutic antibody cocktails.
Heart disease is the leading cause of death in the United States despite the availability of effective lipid-lowering drugs known as statins, such as Pfizer’s atorvastatin (Lipitor), which is the biggest blockbuster drug of all time. While lipid metabolism disorders are well-accepted as being associated with heart disease, not all patients respond to statins or can tolerate them, creating a need for supplemental and alternative therapies. Monoclonal antibodies that block the binding interaction of proprotein convertase subtilisin/kexin type 9 (PCSK9) enzyme to its receptor, so-called “PCSK9 inhibitors”, are providing a new era of lipid-lowering therapy, namely Praluent (alirocumab) by Sanofi/Regeneron and Repatha (evolocumab) by Amgen, which were approved for market use in 2015.
When developing a new biotherapeutic, understanding the binding interactions that underpin its mechanism of action (MOA) are key to its success in the clinic. The Carterra LSA is a high throughput tool that enables interaction analysis measurements to be performed on hundreds of antibodies at once, allowing researchers to characterize the binding properties of antibody libraries quickly. The ability to generate kinetic, affinity and epitope specificity information at scale accelerates the library-to-lead triage, enabling the prioritization of resources to those antibodies with the most desirable binding properties.