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LIBRIS Formathandbok  (Information om MARC21)
FältnamnIndikatorerMetadata
00004519naa a2200541 4500
001oai:DiVA.org:uu-482502
003SwePub
008220824s2022 | |||||||||||000 ||eng|
009oai:prod.swepub.kib.ki.se:150276488
024a https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-4825022 URI
024a https://doi.org/10.3389/fonc.2022.8993252 DOI
024a http://kipublications.ki.se/Default.aspx?queryparsed=id:1502764882 URI
040 a (SwePub)uud (SwePub)ki
041 a engb eng
042 9 SwePub
072 7a ref2 swepub-contenttype
072 7a art2 swepub-publicationtype
100a Arthur, Ceciliau Karolinska Institutet4 aut
2451 0a Patient-Specific Assays Based on Whole-Genome Sequencing Data to Measure Residual Disease in Children With Acute Lymphoblastic Leukemia :b A Proof of Concept Study
264 c 2022-07-05
264 1b Frontiers Media S.A.c 2022
338 a electronic2 rdacarrier
520 a Risk-adapted treatment in acute lymphoblastic leukemia (ALL) relies on genetic information and measurable residual disease (MRD) monitoring. In this proof of concept study, DNA from diagnostic bone marrow (BM) of six children with ALL, without stratifying genetics or central nervous system (CNS) involvement, underwent whole-genome sequencing (WGS) to identify structural variants (SVs) in the leukemic blasts. Unique sequences generated by SVs were targeted with patient-specific droplet digital PCR (ddPCR) assays. Genomic DNA (gDNA) from BM and cell-free DNA (cfDNA) from plasma and cerebrospinal fluid (CSF) were analyzed longitudinally. WGS with 30x coverage enabled target identification in all cases. Limit of quantifiability (LoQ) and limit of detection (LoD) for the ddPCR assays (n = 15) were up to 10(-5) and 10(-6), respectively. All targets were readily detectable in a multiplexed ddPCR with minimal DNA input (1 ng of gDNA) at a 10(-1) dilution, and targets for half of the patients were also detectable at a 10(-2) dilution. The level of MRD in BM at end of induction and end of consolidation block 1 was in a comparable range between ddPCR and clinical routine methods for samples with detectable residual disease, although our approach consistently detected higher MRD values for patients with B-cell precursor ALL. Additionally, several samples with undetectable MRD by flow cytometry were MRD-positive by ddPCR. In plasma, the level of leukemic targets decreased in cfDNA over time following the MRD level detected in BM. cfDNA was successfully extracted from all diagnostic CSF samples (n = 6), and leukemic targets were detected in half of these. The results suggest that our approach to design molecular assays, together with ddPCR quantification, is a technically feasible option for accurate MRD quantification and that cfDNA may contribute valuable information regarding MRD and low-grade CNS involvement.
650 7a MEDICIN OCH HÄLSOVETENSKAPx Klinisk medicinx Klinisk laboratoriemedicin0 (SwePub)302232 hsv//swe
650 7a MEDICAL AND HEALTH SCIENCESx Clinical Medicinex Clinical Laboratory Medicine0 (SwePub)302232 hsv//eng
653 a acute lymphoblastic leukemia
653 a liquid biopsy
653 a disease monitoring
653 a precision medicine
653 a whole-genome sequencing
653 a structural variation
653 a technical feasibility
653 a diagnostic performance
700a Rezayee, Fatemahu Karolinska Institutet4 aut
700a Mogensen, Ninau Karolinska Institutet4 aut
700a Saft, Leonieu Karolinska Institutet4 aut
700a Rosenquist, Richardu Karolinska Institutet4 aut
700a Nordenskjoeld, Magnusu Karolinska Institutet4 aut
700a Harila-Saari, Arja H.u Uppsala universitet,Barnonkologisk och neurologisk forskning4 aut0 (Swepub:uu)arjha456
700a Tham, Emmau Karolinska Institutet4 aut
700a Barbany, Giselau Karolinska Institutet4 aut
710a Karolinska Institutetb Barnonkologisk och neurologisk forskning4 org
773t Frontiers in Oncologyd : Frontiers Media S.A.g 12q 12x 2234-943X
856u https://doi.org/10.3389/fonc.2022.899325y Fulltext
856u https://uu.diva-portal.org/smash/get/diva2:1689818/FULLTEXT01.pdfx primaryx Raw objecty fulltext:print
8564 8u https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-482502
8564 8u https://doi.org/10.3389/fonc.2022.899325
8564 8u http://kipublications.ki.se/Default.aspx?queryparsed=id:150276488

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