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CLN3 patients with differing progression of the disease

ABSTRACT: Mutations in the CLN3 gene lead to juvenile neuronal ceroid lipofuscinosis, a pediatric neurodegenerative disorder characterized by visual loss, epilepsy and psychomotor deterioration. Although most CLN3 patients carry the same 1 kb deletion in the CLN3 gene, their disease phenotype can be variable. The aims of this study were (1) to identify genes that are dysregulated in CLN3 disease regardless of the clinical course that could be useful as biomarkers, and (2) to find modifier genes that affect the progression rate of the disease. Genome-wide expression profiling was performed in 8 CLN3 patients, homozygous for the 1 kb deletion, with different disease progression and compared to seven age and gender matched controls. Lymphocytes from eight patients diagnosed with CLN3 disease,all homozygous for the 1 kb deletion in the CLN3 gene and classified as having rapid (n = 2), average (n=4), and slow disease progression (n = 2), were used. These eight patients did not receive anticonvulsive medication. In addition, lymphocytes of seven age and gender matched controls were included in the study. Lymphocytes were prepared from fresh patient blood samples by Ficoll-gradient centrifugation (BiocollM-BM-., Biochrom AG, Berlin, Germany) according to the manufacturerM-bM-^@M-^Ys protocol and used for RNA isolation (RNeasyM-BM-. Micro Kit, Qiagen, Hilden, Germany).

ORGANISM(S): Homo sapiens

SUBMITTER: Thomas Streichert

PROVIDER: E-GEOD-22225 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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CLN3 patients with differing progression of the disease

Project description:Mutations in the CLN3 gene lead to juvenile neuronal ceroid lipofuscinosis, a pediatric neurodegenerative disorder characterized by visual loss, epilepsy and psychomotor deterioration. Although most CLN3 patients carry the same 1 kb deletion in the CLN3 gene, their disease phenotype can be variable. The aims of this study were (1) to identify genes that are dysregulated in CLN3 disease regardless of the clinical course that could be useful as biomarkers, and (2) to find modifier genes that affect the progression rate of the disease. Genome-wide expression profiling was performed in 8 CLN3 patients, homozygous for the 1 kb deletion, with different disease progression and compared to seven age and gender matched controls.

2011-06-08 | GSE22225 | GEO

Lysosomal alterations and altered electrophysiological activity in atypical juvenile neuronal ceroid lipofuscinoses (CLN3 1 kb deletion, E295K) patient-derived cortical neurons

Project description:Juvenile neuronal ceroid lipofuscinoses (JNCL) is a lysosomal storage disorder associated with fatal neurodegeneration that is caused by mutations in CLN3. Most individuals with JNCL carry at least one allele with 1 kb deletion in CLN3 which results in the deletion of exons 7 and 8. There is a need for more physiologically relevant human cell-based JNCL models to better understand the cellular changes during the disease process. Using CRISPR/Cas9, we have corrected a 1 kb deletion mutation in human induced pluripotent stem cells (iPSC) of a compound heterozygous patient (CLN3 Δ1 kb and E295K), to generate an isogenic control to be used for disease modeling along with the unedited CLN3 patient iPSCs. iPSC-derived neurons carrying this particular CLN3 mutation, CLN3 neurons, had lower levels of spike, burst and network burst activity for most of the culture period. Proteomics analysis showed downregulation of proteins related to axon guidance and endocytosis on day in vitro (DIV) 14 and 42 in CLN3 neurons. This was accompanied by an increase in lysosomal-related proteins in CLN3 neurons. Western blot analysis of LAMP1 expression revealed a new finding where LAMP1 was hyperglycosylated in CLN3 neurons on DIV 14, 28 and 42, which was not apparent in control neurons. Ultrastructural analysis of CLN3 neurons showed numerous membrane-bound vacuoles containing diverse types of storage material, ranging from curvilinear deposits, multilamellar structures to osmiophilic deposits. Our findings suggest alterations in lysosomal function and neurodevelopment involving axon guidance and synaptic transmission in CLN3-deficient neuronal derivatives, which could be potential targets for therapy.

2022-12-07 | PXD032191 | Pride

Homo sapiens

Project description:CLN3 patients with differing progression of the disease

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TRAIL expressing monocyte/macrophages reduce inflammation and attenuate atherosclerosis

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Project description:Neuroblastoma (NB) is the most common extra cranial solid tumor in infants. Although several risk factors including patient age, disease stage and genetic abnormalities, such as MYCN amplification and 11q deletion, have been shown to predict outcome, the mechanisms responsible for the heterogeneous clinical behavior of this tumor, ranging from spontaneous regression to rapid progression of disease and patient’s death, remain largely unknown. Patients with disseminated disease mainly show metastasis at bone marrow (BM) and bone. The presence of metastasis is an independent unfavorable prognostic factor for NB patients over 18 months of age at diagnosis, whose event-free and overall survivals are grim despite intensive multimodal therapies. We decided to investigate the transcriptome of both NB metastatic cells and resident hematopoietic BM cells to get insight on potential targets for diagnostic, prognostic and therapeutic purposes. Hereby, we report on the results obtained by comparing BM resident hematopoietic cells in the presence and absence of infiltrating NB hematopoietic cells with BM cells from young healthy donors.

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2020-07-08 | GSE153918 | GEO

Gene expression analysis of bone marrow mesenchymal stromal cells from myelodysplastic syndrome (MDS) patients and normal controls

Project description:Myelodysplastic syndrome (MDS) is a group of heterogeneous clonal stem cell disorders. We hypothesize that gene expression changes in the bone marrow (BM) microenvironment might play a fundamental role in the development and progression of MDS. The goal of the present study is to investigate the differences in gene expression profiles of BM mesenchymal stromal cells (MSCs) between MDS patients and normal individuals, as well as between MDS subtypes. To this end, we applied global gene expression profiling on BM MSCs from adult de novo MDS patients and from controls. The results suggest that gene expression of the MDS BM microenvironment is difference from control BM. In particular, interferon signaling pathway was shown to be up-regulated in MDS BM. The results also showed altered expression according to disease progression. The present study provides evidence supporting MDS as an immune disease and suggests that BM MSCs are a possible therapeutic target in MDS.

2015-03-25 | GSE61853 | GEO

IKKa-mediated signaling circuitry regulates early B lymphopoiesis during hematopoiesis

Project description:Multiple transcription factors regulate B cell commitment, which coordinates with myeloid–erythroid lineage differentiation. One such factor, NF-kB, has long been speculated to regulate early B cell development; however, this issue remains controversial. IKKa is required for splenic B cell maturation, but not for bone marrow (BM) B cell development. Here, we unexpectedly found defective BM B cell development and an increased myeloid–erythroid lineages in kinase-dead IKKa (KA/KA) knock-in mice. Markedly increased cytosolic p100, an NF-kB2 inhibitory form, and reduced nuclear NF-kB p65, RelB, p50, and p52, as well as IKKa, was observed in KA/KA splenic and BM B cells. Several B- and myeloid–erythroid-cell regulators, including Pax5, were deregulated in KA/KA BM B cells. Using fetal liver and BM congenic transplants, and IKKa deletion from early hematopoietic cells in mice, this defect was identified as B cell intrinsic and as an early event during hematopoiesis. Re-expression of IKKa, Pax5, or combined NF-kB molecules promoted B cell development, but repressed myeloid–erythroid cell differentiation in KA/KA BM B cells. Together, these results demonstrate that IKKa regulates B-lineage commitment via combined canonical and noncanonical NF-kB transcriptional activity to target Pax5 expression during hematopoiesis.

2011-07-02 | GSE30363 | GEO

Extracellular vesicles as prognostic biomarkers for Multiple Myeloma - a clinical population-based study

Project description:Multiple myeloma (MM) is an incurable hematological malignancy of mature B lymphocytes. In this study patients with MGUS, SMM and MM followed in two hematology departments were enrolled. Extracellular vesicles were isolated from bone marrow (BM) and peripheral blood (PB) followed by mass spectrometry based bottom up proteomics.

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Affymetrix SNP array data for myelodysplastic syndrome with 5q deletion treated with lenalidomide

Project description:Lenalidome is a drug especially effective in low risk myelodysplastic syndromes (MDS) with isolated 5q deletion. However, 25% of the patients did not respond. TP53 mutations have been described to play a role in the disease progression, and karyotypic complexity also has an important impact in the outcome. We selected 53 MDS patients with 5q deletion and treated with lenalidomide and we studied by the following techniques: conventional G-banding cytogenetics (CC), single nucleotide polymorphism arrays (SNP-A) and sequencing, in order to assess their impact on treatment response and disease progression. Low karyotypic complexity (by CC), a high baseline platelet count (>280x103/L) and TP53 unmutated gene status are associated with the achievement of hematological response (P=0.005, P=0.008 and P=0.057, respectively). In a multivariate model, the most important predictors for lenalidomide failure are karyotypic complexity (P=0.014) and a platelet count below 280x103/L (P=0.042). Additionally, none of the TP53 mutated cases achieved complete cytogenetics response. Nevertheless, inclusion of defects by SNP-A did not allow for a better separation of responders and non responders. These findings constitute a useful reference data to be considered before lenalidomide treatment enrollment. Affymetrix SNP arrays were performed according to the manufacturer's directions on DNA extracted from bone marrow or peripheral blood and, in some cases, also lymphocytes CD3 isolated from peripheral blood samples. Copy number analyses of Affymetrix 250K and 6.0 SNP arrays were performed for 53 MDS with 5q deletion samples. There are also 30 samples from lymphocytes CD3 isolated from peripheral blood, which were used as germ-line DNA (control).

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