Role of biomarkers in disease management and drug development in Africa: A narrative review
Biomarkers are quantifiable components in the body or its byproducts that can be used to evaluate human health or pathogen development. This review aimed to explore and evaluate the utilization, challenges, and prospects of biomarkers in enhancing drug development in Africa. We searched for relevant articles in online databases, such as PubMed, Science Direct, and Google Scholar, covering the period from 2013 to 2024. The use of biomarkers can be traced back to the 1800s when they were initially referred to as surrogate markers and later as surrogate endpoints. Biomarkers are specific molecules or cells in the body that serve as indicators of underlying biological processes, aiding in disease diagnosis or measuring pharmacological responses to therapy. Diagnostic biomarkers are biomolecules that indicate the presence of diseases or help identify specific disease subtypes in individuals. Examples of biomarkers for common diseases, such as malaria, include Plasmodium falciparum lactate dehydrogenase, histidine-rich protein 2, and hemozoins; for colorectal cancer, biomarkers include Rat Sarcoma, microsatellite instability, human epidermal growth factor receptor 2, consensus molecular subtypes, and Circulating tumor DNA/Circulating tumor cells. These biomarkers guide targeted therapy and adjuvant chemotherapy approaches by allowing for patient stratification and determining which patients would benefit from adjuvant treatment. Overcoming challenges such as cost-effectiveness and regulatory approval is crucial. Despite initial financial and logistical constraints, these efforts will ultimately result in significant improvements in efficiency.
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