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A high-throughput sequencing test for diagnosing inherited bleeding, thrombotic, and platelet disorders

Simeoni, Ilenia, Stephens, Jonathan C., Hu, Fengyuan, Deevi, Sri V. V., Megy, Karyn, Bariana, Tabir K., Lentaigne, Claire, Schulman, Sol, Sivapalaratnam, Suthesh, Vries, Minka J. A., Westbury, Sarah K., Greene, Daniel, Papadia, Sofia, Alessi, Marie-Christine, Attwood, Antony P., Ballmaier, Matthias, Baynam, Gareth, Bermejo, Emilse, Bertoli, Marta, Bray, Paul F., Bury, Loredana, Cattaneo, Marco, Collins, Peter, Daugherty, Louise C., Favier, Remi, French, Deborah L., Furie, Bruce, Gattens, Michael, Germeshausen, Manuela, Ghevaert, Cedric, Goodeve, Anne C., Guerrero, Jose A., Hampshire, Daniel J., Hart, Daniel P., Heemskerk, Johan W. M., Henskens, Yvonne M. C., Hill, Marian, Hogg, Nancy, Jolley, Jennifer D., Kahr, Walter H., Kelly, Anne M., Kerr, Ron, Kostadima, Myrto, Kunishima, Shinji, Lambert, Michele P., Liesner, Ri, Lopez, Jose A., Mapeta, Rutendo P., Mathias, Mary, Millar, Carolyn M., Nathwani, Amit, Neerman-Arbez, Marguerite, Nurden, Alan T., Nurden, Paquita, Othman, Maha, Peerlinck, Kathelijne, Perry, David J., Poudel, Pawan, Reitsma, Pieter, Rondina, Matthew T., Smethurst, Peter A., Stevenson, William, Szkotak, Artur, Tuna, Salih, van Geet, Christel, Whitehorn, Deborah, Wilcox, David A., Zhang, Bin, Revel-Vilk, Shoshana, Gresele, Paolo, Bellissimo, Daniel B., Penkett, Christopher J., Laffan, Michael A., Mumford, Andrew D., Rendon, Augusto, Gomez, Keith, Freson, Kathleen, Ouwehand, Willem H. and Turro, Ernest 2016. A high-throughput sequencing test for diagnosing inherited bleeding, thrombotic, and platelet disorders. Blood 127 (23) , pp. 2791-2803. 10.1182/blood-2015-12-688267

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Inherited bleeding, thrombotic, and platelet disorders (BPDs) are diseases that affect ∼300 individuals per million births. With the exception of hemophilia and von Willebrand disease patients, a molecular analysis for patients with a BPD is often unavailable. Many specialized tests are usually required to reach a putative diagnosis and they are typically performed in a step-wise manner to control costs. This approach causes delays and a conclusive molecular diagnosis is often never reached, which can compromise treatment and impede rapid identification of affected relatives. To address this unmet diagnostic need, we designed a high-throughput sequencing platform targeting 63 genes relevant for BPDs. The platform can call single nucleotide variants, short insertions/deletions, and large copy number variants (though not inversions) which are subjected to automated filtering for diagnostic prioritization, resulting in an average of 5.34 candidate variants per individual. We sequenced 159 and 137 samples, respectively, from cases with and without previously known causal variants. Among the latter group, 61 cases had clinical and laboratory phenotypes indicative of a particular molecular etiology, whereas the remainder had an a priori highly uncertain etiology. All previously detected variants were recapitulated and, when the etiology was suspected but unknown or uncertain, a molecular diagnosis was reached in 56 of 61 and only 8 of 76 cases, respectively. The latter category highlights the need for further research into novel causes of BPDs. The ThromboGenomics platform thus provides an affordable DNA-based test to diagnose patients suspected of having a known inherited BPD.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Medicine
Publisher: American Society of Hematology
ISSN: 0006-4971
Date of Acceptance: 7 April 2016
Last Modified: 28 Oct 2020 13:00

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