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Discriminating activities of DEAD-Box Helicase 41 from myeloid malignancy-associated germline variants by genetic rescue

ABSTRACT: Although DEAD-box helicase 41 (DDX41) is implicated in oncogenic and innate immune mechanisms, there are many unanswered questions about how the ever-increasing spectrum of genetic variants impacts DDX41 activity. Here, we describe a facile genetic rescue assay that discriminates activities of DDX41 from those of human myeloid malignancy-linked germline and somatic DDX41 mutants. Our analyses revealed that the variants were impaired in their intrinsic RNA-regulatory activities and to induce monocytic differentiation markers. It will be instructive to extend these analyses to more broadly conduct structure/function assessments for clinical genetic curation and leverage the quantitative assay to elucidate mechanisms and interventions that promote and/or oppose DDX41 function, thereby influencing DDX41-linked pathogenicity.

ORGANISM(S): Mus musculus

PROVIDER: GSE208400 | GEO | 2022/12/04

REPOSITORIES: GEO

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Project description:NOTE: This is a research study and is not meant to be a substitute for clinical genetic testing. Families may never receive results from the study or may receive results many years from the time they enroll. If you are interested in clinical testing please consider seeing a local genetic counselor or other genetics professional. If you have already had clinical genetic testing and meet eligibility criteria for this study as shown in the Eligibility Section, you may enroll regardless of the results of your clinical genetic testing. While it is well recognized that hereditary factors contribute to the development of a subset of human cancers, the cause for many cancers remains unknown. The application of next generation sequencing (NGS) technologies has expanded knowledge in the field of hereditary cancer predisposition. Currently, more than 100 cancer predisposing genes have been identified, and it is now estimated that approximately 10% of all cancer patients have an underlying genetic predisposition. The purpose of this protocol is to identify novel cancer predisposing genes and/or genetic variants. For this study, the investigators will establish a Data Registry linked to a Repository of biological samples. Health information, blood samples and occasionally leftover tumor samples will be collected from individuals with familial cancer. The investigators will use NGS approaches to find changes in genes that may be important in the development of familial cancer. The information gained from this study may provide new and better ways to diagnose and care for people with hereditary cancer. PRIMARY OBJECTIVE: * Establish a registry of families with clustering of cancer in which clinical data are linked to a repository of cryopreserved blood cells, germline DNA, and tumor tissues from the proband and other family members. SECONDARY OBJECTIVE: * Identify novel cancer predisposing genes and/or genetic variants in families with clustering of cancer for which the underlying genetic basis is unknown.

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Discriminating activities of DEAD-Box Helicase 41 from myeloid malignancy-associated germline variants by genetic rescue

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