3335 results for "*geneti*"

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• Whole-exome-sequencing in Charcot-Marie-Tooth disease (CMT)

  To identify the genetic cause and modifiers of Charcot-Marie-Tooth disease (CMT), we performed Whole-exome-sequencing of CMT patients.

  Study JGAS000337

• Biomarker Research for Anti EGFR Monoclonal Antibodies by Comprehensive Cancer Genomics

  The purpose of this study is to explore new biomarkers for predicting the effectiveness of an anti-epidermal growth factor receptor (anti-EGFR) antibody in patients with advanced colorectal cancer. The investigation involves analyzing the entire exome, conducting a genome-wide association study (GWAS), and analyzing copy number variations (CNVs) using single nucleotide polymorphism (SNP) arrays. Genetic material from both cancerous and non-cancerous tissues, as well as blood samples from patients who received the antibody treatment, will be used. The goal is to identify genetic mutations and SNPs associated with treatment efficacy and adverse events, and to assess the correlation between their presence and treatment effectiveness using statistical methods.

  Study JGAS000779

• Application of organoid culture system of human gastrointestinal and thoracic cancer in genome medicine

  In order to establish preclinical models, we have established a kind of lung cancer tumoroids derived from a mucus-producing solid pulmonary adenocarcinoma patient. We performed whole exome sequencing and RNA sequencing to analyze genetic background of the tumoroids.

  Study JGAS000664

• Application of organoid culture system of human gastrointestinal and thoracic cancer in genome medicine

  In order to establish preclinical models, we have established three kinds of lung cancer tumoroids derived from three different pulmonary large cell neuroendocrine carcinoma patients. We performed whole exome sequencing to analyze genetic background of these kinds of tumoroids.

  Study JGAS000641

• Unraveling the heterogeneity of multiple myeloma identifies therapy resistant subpopulation with vulnerability to the splicing pathway intervention

  Intra-tumor heterogeneity underlies the therapy resistance of multiple myeloma (MM). However, its details remain unknown. Here, we performed single-cell RNA sequencing coupled with VDJ targeted sequencing on highly purified bone marrow lineage marker-negative CD38+ MM cells from patients at diagnosis and in remission. This approach successfully subdivided MM cells into distinct clusters, unraveling their heterogeneity and plasticity on the axis of cell surface CD138 expression. Notably, unique clusters were identified in the minor CD138-negative population that resisted therapies. CRISPR/Cas9 screening of upregulated genes in the resistant population identified their vulnerability to the splicing pathway inhibition, among which RNA-binding protein 39 (RBM39) appeared to be overexpressed in the resistant population and involved in aberrant splicing. Genetic and pharmacological inhibition of RBM39 exerted a profound synthetic lethal effect on them. Our results unveil an uncharacterized subpopulation associated with therapy resistance and provide a novel therapeutic strategy targeting the splicing pathway in MM.

  Study JGAS000723

• Application of organoid culture system of human gastrointestinal and thoracic cancer in genome medicine

  In order to establish preclinical models, we have established a kind of lung cancer tumoroids derived from a mucus-producing solid pulmonary adenocarcinoma patient. We performed whole exome sequencing and RNA sequencing to analyze genetic background of the tumoroids.

  Study JGAS000653

• Whole-exome-sequencing in Motor neuron disease (MND)

  To identify the genetic cause and modifiers of Motor neuron disease (MND), we performed Whole-exome-sequencing of Motor neuron disease (MND) patients.

  Study JGAS000422

• Genetic analyses in patients with T or NK cells-associated disorders

  We conduct somatic gene mutation analysis in various diseases involving T cells or NK cells and clarify the gene mutation profile. By comparing clinical information and the results of mutation analysis, we will identify gene groups that influence the onset and refractoriness of the disease. As the analysis continues, the results of mutation analysis may become part of diagnostic criteria in the future, or provide basic data for the development of new therapeutic agents.

  Study JGAS000709

• In vitro reconstitution of epigenetic reprogramming in the human germ line

  Epigenetic reprogramming resets parental epigenetic memories and differentiates primordial germ cells (PGCs) into mitotic pro-spermatogonia or oogonia, ensuring sexually dimorphic germ-cell development for totipotency. In vitro reconstitution of epigenetic reprogramming in humans remains a fundamental challenge. Here, we establish a robust strategy for inducing epigenetic reprogramming and differentiation of pluripotent stem cell (PSC)-derived human PGC-like cells (hPGCLCs) into mitotic pro-spermatogonia or oogonia, coupled with their extensive amplification (~>1010-fold). Strikingly, bone morphogenetic protein (BMP) signalling is a key driver of these processes: BMP-driven hPGCLC differentiation involves an attenuation of the mitogen-activated protein kinase/extracellular-regulated kinase (MAPK/ERK) pathway and both de novo and maintenance DNA methyltransferase (DNMT) activities, likely promoting replication-coupled, passive DNA demethylation. On the other hand, hPGCLCs deficient in tens-eleven translocation (TET) 1, an active DNA demethylase abundant in human germ cells, differentiate into extraembryonic cells, including amnion, with de-repression of key genes bearing bivalent promoters; these cells fail to fully activate genes vital for spermatogenesis and oogenesis, with their promoters remaining methylated. Our study elucidates the framework of epigenetic reprogramming in humans, making a fundamental advance in human biology, and through the generation of abundant mitotic pro-spermatogonia and oogonia-like cells, represents a milestone for human in vitro gametogenesis (IVG) research and its potential translation into reproductive medicine.

  Study JGAS000690

• LEF1 knockdown effects on human T cell transcriptome and chromatin accessibility profiles.

  LEF1 (Lymphoid Enhancer-Binding Factor 1) is a key transcription factor in T cell development and function, and its dysregulation has been implicated in various immune-related disorders. This study aimed to comprehensively characterize the transcriptional and epigenetic changes induced by LEF1 knockdown in human T cells. CD3+ T cells isolated from three healthy donors were transfected with either LEF1-specific siRNA or control siRNA, followed by activation with CD3/CD28 Dynabeads and culture in IL-2-containing media. Cells were harvested at 24, 48 and 72 hours post-transfection for multi-omics analysis including bulk RNA-seq, bulk ATAC-seq, single-cell CITE-seq (For CITE-seq, 48 and 72 hours only). This dataset provides insights into LEF1-dependent gene regulatory networks and chromatin accessibility patterns in activated human T cells, contributing to our understanding of T cell biology and potential therapeutic targets. This dataset is part of a comprehensive study investigating functional roles of risk polymorphisms in autoimmune diseases, particularly focusing on the rs58107865 variant at the LEF1 locus.

  Study JGAS000818

• Chromatin accessibility in stem cells unveils progressive transcriptional reprogramming in myelodysplastic syndrome

  Myelodysplastic syndromes (MDS) originate from hematopoietic stem cell (HSC) clones with acquired gene mutations/deletions. However, our knowledge on the epigenetic properties of MDS stem cells are limited. Here, we examined chromatin accessibility of MDS stem cells. Chromatin accessibility profiles of MDS stem cells represented the disease status better than progenitor cells and unveiled the process of stem cell reprograming during disease progression. Characterization of differentially accessible regions (DARs) revealed that MDS stem cells acquire progenitor-like chromatin accessibility with disease progression, resulting in imprecise stem-progenitor hierarchy. Profiling of transcriptional factor binding motifs at DARs revealed precocious inactivation and activation of HSC and myeloid transcriptional networks, respectively, in MDS stem cells. Increased chromatin accessibility at CEBP target sites well represented the myeloid reprograming of MDS stem cells and stratified MDS into distinct subgroups. Newly developed "Progenitor scores" based on chromatin accessibility well stratified the disease status and correlated with prognosis. These results highlight that the chromatin properties of MDS stem cells define the cell-autonomous behavior of MDS and disease progression.

  Study JGAS000718

• Comprehensive survey for the construction of an integrated database of food, gut microbiome, and health information (the "Sukoyaka Health Survey") A data collection study exploring the relationship between the gut microbiome, food, health, and the genome.

  We conducted a cohort-based study to investigate the association between the genetic background and diet/lifestyle in 51 healthy Japanese. We analyzed some participants living in Nagahama. The SNP array (Japonica Array v2) was used for genotyping. Shotgun metagenomic sequencing of fecal microbiome were analyzed.

  Study JGAS000680

• Whole genome sequencing of human induced pluripotent stem cells derived from 5 type I cyctic biliary atresia patients

  We have successfully generated a panel of human induced pluripotent stem cells (hiPSCs) from five Japanese patients carrying type I cystic biliary atresia (BA). These hiPSC lines have exhibited characteristics of self-renewal and pluripotency. These cells held normal karyotypes mostly, but one of them carried hemizygous deletions, of which clinical significance is unknown yet. Whole genome sequence analysis indicated that some of the mutations or single nucleotide polymorphisms (SNPs) commonly found in these patients are related to hepatobiliary abnormality. Given the limited understanding of the molecular pathogenesis of cystic BA, attributed to unknown factors of genetic and environmental causes, these cellular resources will be instrumental in replicating disease phenotypes and in the advancement of novel therapies for this condition.

  Study JGAS000765

• RNA-seq data of bone marrow CD34-positive cells from 57 patients with myelodysplastic syndromes (MDS) and 5 healthy individuals (62 participants in total)

  Genetic mutations in hematopoietic neoplasms, seen in disease-specific and non-specific ways, are key drivers in pathogenesis. Typically, these mutations alone don't cause neoplasms; rather, multiple mutations or breakdowns in regulatory mechanisms occur, progressing the disease through stages. Genetic mutation patterns vary even within subtypes, suggesting shared gene expression abnormalities from different mutations may drive neoplasm development. Identifying these "common factors" is vital for effective molecular-targeted therapy development. Our study aims to elucidate neoplasm pathogenesis by analyzing patient genetic abnormalities, pinpointing "common factors" in each subtype for novel targeted therapy development.

  Study JGAS000724

• Phenotype and genotype correlation analysis in tuberous sclerosis complex

  To elucidate the genetic clues of the related clinical manifestations, whole exome sequencing analysis was performed in 163 of the patients with TSC and compared the severity of the symptoms.

  Study JGAS000688

• Analysis of genes associated with autistic spectrum disorder, schizophrenia, and bipolar disorder.

  Autism spectrum disorders (ASD) represent a heterogeneous group of neurodevelopmental disorders with strong genetic predispositions. Although an increasing number of genetic variants have been implicated in the pathogenesis of ASD, little is known about the relationship between ASD-associated genetic variants and individual ASD traits. We performed case-control association study of 32 Japanese children with ASD (mainly with high-functioning autism) and 36 with typical development.

  Study JGAS000731

• Genetic analyses in patients with T or NK cells-associated disorders

  We conduct somatic gene mutation analysis in various diseases involving T cells or NK cells and clarify the gene mutation profile. By comparing clinical information and the results of mutation analysis, we will identify gene groups that influence the onset and refractoriness of the disease. As the analysis continues, the results of mutation analysis may become part of diagnostic criteria in the future, or provide basic data for the development of new therapeutic agents.

  Study JGAS000658

• An epidemiological study examining the relationship among food, health, and genome

  We conducted a cohort-based study to investigate the association between the genetic background and diet/lifestyle in 962 healthy Japanese. We analyzed the Ebetsu cohort and some participants living in Tokyo. The SNP array (Japonica Array v2) was used for genotyping. Shotgun metagenomic sequencing of fecal microbiome and metabolome of feces and blood were analyzed.

  Study JGAS000678

• Whole-genome-sequencing and Whole-exome-sequencing in Myopathy

  To identify the genetic cause and modifiers of Myopathy, we performed Whole-genome-sequencing and Whole-exome-sequencing of Myopathy patients.

  Study JGAS000365

• Exome analysis of cardiomyopathy patients with PKP2 variants

  This research aims to identify genetic background of cardiomyopathy patients with PKP2 pathogenic variants by exome analysis.

  Study JGAS000566

• Exome analysis of cardiomyopathy patients with DSG2 variants

  This research aims to identify genetic background of cardiomyopathy patients with DSG2 pathogenic variants by exome analysis.

  Study JGAS000565

• Application of organoid culture system of human gastrointestinal and thoracic cancer in genome medicine

  In order to establish preclinical models, we have established three kinds of esophageal tumoroids derived from esophageal cancer patient. We performed whole exome sequencing to analyze genetic background of the tumoroids.

  Study JGAS000749

• Whole-genome-sequencing, Whole-exome-sequencing and RNA-sequencing in Sporadic ALS

  To identify the genetic cause and modifiers of Sporadic ALS, we performed Whole-genome-sequencing, Whole-exome-sequencing and RNA-sequencing of Sporadic ALS patients.

  Study JGAS000393

• Deciphering molecular mechanisms underlying hematological malignancies and development of novel therapeutic approaches

  We aim to identify epigenomic features dysregulated in hematological malignancies through epigenetic analyses of hematological malignant cells. We also perform RNA sequencing to profile tumor cell-specific transcriptomes and target gene sequencing to profile somatic gene mutations in tumor cells. Regarding identified epigenomic abnormalities, we perform further analysis to determine whether they could be good candidates to translate into therapy development. To this end, we will modulate the activity of targets by using their activators and inhibitors in vitro and establish xenograft mouse models of hematological malignancies and manipulate their activity in vivo. Through these studies, we aim to develop new therapeutic agents or modalities that lead to improved patients��� prognosis.

  Study JGAS000603

• Comprehensive survey for the construction of an integrated database of food, gut microbiome, and health information (the "Sukoyaka Health Survey")

  We conducted a cohort-based study to investigate the association between the genetic background and diet/lifestyle in 59 healthy Japanese. We analyzed some participants living in Nagasaki. Shotgun metagenomic sequencing of fecal microbiome were analyzed.

  Study JGAS000681