Researchers at Weill Cornell Medicine-Qatar (WCM-Q) have published a study that marks the introduction to Qatar of some of the world’s most advanced analytical tools for discovering the links between genetic variations, proteins and a wide range of diseases.
Using a new tool to measure proteins, WCM-Q researchers Dr Karsten Suhre and Dr Frank Schmidt analysed the blood samples of more than 320 individuals from a multi-ethnic cohort in Qatar.
The Proteograph Product Suite, allowed the researchers to quantify more than 18,000 different peptides from more than 3,000 proteins.
Bringing this new tool, provided by the US-based biotechnology company Seer, to WCM-Q further enhances Qatar’s emerging status as a leader in the field of proteomics, which is the large-scale study of proteins, their structures, interactions, functions, and their impact on health, a statement said.
Lead author Dr Suhre, professor of physiology and biophysics at WCM-Q, explained: “To understand how genetic diseases function, it is not enough to simply identify the genetic variation that causes the disease. We need to know more, how genes direct which proteins are synthesised by the body, in what quantities, and how they function.
"So, by analysing the relationships between the natural genetic variations in the human population and their effects on specific proteins we can obtain a deeper understanding of how organisms function as a whole, and also eventually a greater understanding of how genetic diseases come about and how to treat them.”
Diseases which are linked to genetic variants in proteins that have been addressed by the study include coronary artery disease, type 2 diabetes, amyotrophic lateral sclerosis, and atrial fibrillation.
Discovering the complex associations between genetic variants and proteins by merging proteomics and genomics research approaches is considered to be an extremely promising avenue for unearthing new therapies for a wide range of diseases, including cardio and metabolic disorders.
The study, published in Nature Communications, a leading scientific journal, provides evidence that the new analytical tool from Seer has enhanced capabilities to perform a process called ‘protein quantitative trait loci mapping’ . This is the identification of links between particular positions on a gene and the presence of a certain amount of a particular protein, which is important because many serious genetic diseases are caused by protein dysregulation.
Using the tool, the researchers were able to report in the study that they identified 184 protein-altering variants in 137 genes, which they were also able to associate with corresponding variant peptides, providing extra confirmation of the accuracy of their observations.
Dr Schmidt, associate professor of biochemistry and director of the proteomics core at WCM-Q, said: “To investigate proteins, you need a way to identify and quantify them in samples of human tissue, such as blood. Our study shows that the Seer Proteograph platform enables us to do this with an enhanced level of accuracy and in high quantities—we can identify and quantify more proteins and match them more accurately with the genes that code each protein, so we can build up far more comprehensive and accurate pictures of how genetic variations code for particular formations of proteins, including formations that subsequently cause disease.”
Dr Khaled Machaca, professor of research in physiology and senior associate dean for research, innovations, and commercialisation at WCM-Q, said: “Proteomics is an extraordinarily exciting and important area for research, holding huge potential for discoveries with applications in precision medicine, such as the possible development of new therapies for treating inherited genetic diseases, among many other promising avenues.”
