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Discovering and developing drugs using bioanalysis

Life Sciences Review | Tuesday, July 12, 2022
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It is widely accepted that bioanalysis is an integral part of the pharmacokinetic/pharmacodynamic characterization of a novel chemical entity from the time of its discovery and during various stages of drug development, leading to its market authorization.


FREMONT, CA: A new medicine's discovery and development can cost up to USD 1 billion, and it can take up to 10 years for the drug to be commercially available. The process of creating compounds and analysing each one's attributes to determine whether it is feasible to choose one new chemical entity (NCE) and turn it into a safe and effective medicine is known as drug discovery and development. Radical changes are being made to drug development and discovery strategies. For instance, pharmacokinetics (PK) is increasingly important to both processes. Additionally, toxicokinetics is now widely recognised as a crucial component of toxicity testing. A sensitive and focused bioanalytical technique is crucial given the emphasis on PK/toxicokinetics and the stronger potencies of newer medicines. It is widely recognised and known that the area of bioanalysis has grown to become an essential instrument in the process of finding and developing new drugs. [6–9] Numerous assays, including those for significant metabolites, have been constantly created for NCEs over the past few decades to assist various phases of discovery and development.  A variety of analytical techniques are accessible for both generic and prescription medications. Early clinical studies can benefit greatly from the bioanalytical data produced in discovery and pre-clinical programmes. These programmes' data on plasma concentration-response can be compared to human results. In phase one first dose-escalation research, these comparisons are especially helpful. It is standard procedure for us to produce PK data between each dose increment to maximise this.


A sample can be cleaned up before analysis and/or concentrated to increase detection using a procedure called sample preparation. This process is referred to as bioanalytical sample preparation when samples are biological fluids like plasma, serum, or urine. The measurement of drug concentrations in biological fluids is a crucial step in the process of developing new drugs since it provides information on the PK, or time course of action, of drugs in both animals and humans. To remove the proteins from the sample, sample preparation is a common step in bioanalytical experiments. Regular methods include protein precipitation, liquid-liquid extraction, and solid-phase extraction (SPE). It is generally accepted that a bioanalytical method must first be validated to show that it is appropriate for its intended purpose before being put into normal usage. All development investigations must be supported by a bioanalytical method that has undergone GLP validation. There is consensus that at the very least selectivity, calibration model, stability, accuracy, and limit of quantification should be assessed when validating quantitative techniques. Limit of detection, recovery, repeatability, and robustness are additional parameters that may need to be assessed. By using specialised laboratory studies, validation entails proving that the method's performance characteristics are reliable and appropriate for the intended analytical applications. The criteria used to assess the analytical data closely correlate with the acceptability of the method.


It is typically not essential to carry out all of the different validation studies during the early stages of drug development. For medications in the preclinical through Phase II (preliminary effectiveness) stages, many researchers concentrate on specificity, linearity, and precision investigations. When the medicine enters the Phase II (efficacy) stage of development and has a higher likelihood of becoming a commercial product, the remaining studies penetrating validation are carried out. Currently, the International Conference on Harmonization (ICH), the United States Pharmacopoeia (USP), and the Food and Drug Administration (FDA) provide a framework for regulatory submission that requires the examination of these key criteria.


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