16833 results for "sec+and+unspecified+malignant+neoplasm"

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• Whole-genome Sequencing Suggests Mechanisms for 22q11.2 deletion-associated Parkinson’s disease

  Objectives: To investigate disease risk mechanisms of early-onset Parkinson’s disease (PD) associated with the recurrent 22q11.2 deletion, a genetic risk factor for early-onset PD. Methods: In a proof-of-principle study, we used whole-genome sequencing (WGS) to investigate sequence variants in nine adults with 22q11.2DS, three with neuropathologically confirmed early-onset PD and six without PD. Adopting an approach used recently to study schizophrenia in 22q11.2DS, here we tested candidate gene-sets relevant to PD. Results: No mutations common to the cases with PD were found in the intact 22q11.2 region. While all were negative for rare mutations in a gene-set comprising PD disease-causing and risk genes, another candidate gene-set of 1000 genes functionally relevant to PD presented a nominally significant (P=0.03) enrichment of rare putatively damaging missense variants in the PD cases. Polygenic score results, based on common variants associated with PD risk, were non-significantly greater in those with PD. Conclusions: The results of this first-ever pilot study of WGS in PD suggest that the cumulative burden of genome-wide sequence variants may contribute to expression of early-onset PD in the presence of threshold-lowering dosage effects of a 22q11.2 deletion. We found no evidence that expression of PD in 22q11.2DS is mediated by a recessive locus on the intact 22q11.2 chromosome or mutations in known PD genes. These findings offer initial evidence of the potential effects of multiple within-individual rare variants on the expression of PD and the utility of next generation sequencing for studying the etiology of PD.

  Study EGAS00001002275

• NHLBI's Collection of Datasets for General Research Use (Public Posting of Genomic Summary Results: Allowed)

  This collection contains all of NHLBI's authorized individual-level genomic datasets currently in dbGaP that are approved for General Research Use (GRU) and have no further limitations beyond those outlined in the model Data Use Certification Agreement. Genomic Summary Results (GSR) sharing is allowed (unrestricted) or not applicable. To request access to this study collection, select phs003132 in the dbGaP Authorized Access System.

  Study phs003132

• MicroRNA Biomarkers for Prediction of Preeclampsia

  Maternal serum was collected between 17-28 weeks gestation. Samples were obtained from the high-risk Placental Study at the University of California, San Diego (n=48) and from the average-risk Proteomic Assessment of Preterm Risk (PAPR) Study at Sera Prognostics (n=164). RNA was extracted from 500 microliter of maternal serum using the miRNeasy Micro kit (Qiagen). NEBNext Small RNAseq Library Preparation Kit was used for library construction.

  Study phs002016

• Phase IB/II Study of Bazedoxifene in Combination with Palbociclib in Patients with Endocrine Resistant Hormone Receptor-Positive Breast Cancer

  In this phase Ib/II clinical trial, the investigators evaluated the efficacy and safety of the combination of palbociclib with bazedoxifene in patients with a metastatic endocrine-resistant hormone receptor-positive, HER2-negative breast cancer. Furthermore, whole exome sequencing of cell-free tumor DNA was done on serial samples from these patients, revealing potential molecular changes associated with mechanisms of resistance.

  Study phs002802

• Single-Cell DNA Methylation Profiling with sciMETv2

  In this study we developed a high-throughput single-cell DNA methylation analysis technology, sciMETv2. This technique is rapid, cost-effective, and robust, enabling large-scale single-cell methylome dataset generation. We demonstrate this technology on human middle frontal gyrus, where we identified major cell types. We additionally performed target enrichment using sciMET-cap to enable a reduction in sequencing costs per cell while achieving comparable cell type identification.

  Study phs003091

• Identification of genetic polymorphism on aggressive periodontitis

  Periodontitis is an inflammatory disease with loss of gingival tissue and alveolar bone. Aggressive periodontitis is rapidly progressive form of periodontitis in young people. It has been demonstrated that the susceptibility to AgP is influenced by genetic risk factors. However few were established as a risk factor for aggressive periodontitis. To identify genetic risk factors for aggressive periodontitis in Japanese population, we conducted the exome sequence of unrelated patients.

  Study JGAS000040

• Identification of genetic polymorphism on aggressive periodontitis

  Periodontitis is an inflammatory disease with loss of gingival tissue and alveolar bone. Aggressive periodontitis is rapidly progressive form of periodontitis in young people. It has been demonstrated that the susceptibility to AgP is influenced by genetic risk factors. However few were established as a risk factor for aggressive periodontitis. To identify genetic risk factors for aggressive periodontitis in Japanese population, we conducted the exome sequence of unrelated patients.

  Study JGAS000024

• Genomic characterization of germ-cell tumors in childhood

  Germ cell tumors (GCTs) are rare neoplasms affecting approximately 3.5% of pediatric patients, with diverse histological subtypes. Despite their low mutational burden, prevalent alterations in KIT, KRAS, and NRAS genes are observed, but molecular understanding of pediatric GCTs lags behind adult counterparts. We aimed to elucidate the genomic landscape of 16 pediatric GCT patients via whole exome sequencing (WES), which revealed somatic alterations resembling those in adult GCTs.

  Study EGAS50000000619

• 3D chromatin architecture identification in B cells by MicroC

  MicroC libraries were built using B cells from three healthy donors to investigate the 3D chromatin architecture at nucleosome resolution. This approach enables detailed mapping of chromatin interactions, including loops, domains, and higher-order structures. The resulting data can be used to compare the spatial genome organization in B cells with that of other cell types, shedding light on cell-type-specific chromatin regulation.

  Study EGAS50000001053

• Target bisulfite sequencing of endometrial cancer

  This study aims to investigate epigenetic alterations in the HLA-A locus in endometrial cancer. Targeted bisulfite sequencing was performed to evaluate DNA methylation status of the HLA-A region in a cohort of endometrial cancer samples. The resulting data were used to assess the association between HLA-A methylation and tumor immune microenvironment. These findings contribute to understanding the role of epigenetic regulation of antigen presentation in endometrial cancer.

  Study JGAS000897