scholarly journals Drosophila melanogaster Mutated in its GBA1b Ortholog Recapitulates Neuronopathic Gaucher Disease

2019 ◽  
Vol 8 (9) ◽  
pp. 1420 ◽  
Author(s):  
Cabasso ◽  
Paul ◽  
Dorot ◽  
Maor ◽  
Krivoruk ◽  
...  
Keyword(s):  
Gaucher Disease ◽  
Disease Treatment ◽  
Therapeutic Modalities ◽  
Unfolded Protein ◽  
Terminal Amino ◽  
The Unfolded Protein Response ◽  
Protein Response ◽  
Type 3

Gaucher disease (GD) results from mutations in the GBA1 gene, which encodes lysosomal glucocerebrosidase (GCase). The large number of mutations known to date in the gene lead to a heterogeneous disorder, which is divided into a non-neuronopathic, type 1 GD, and two neurological, type 2 and type 3, forms. We studied the two fly GBA1 orthologs, GBA1a and GBA1b. Each contains a Minos element insertion, which truncates its coding sequence. In the GBA1am/m flies, which express a mutant protein, missing 33 C-terminal amino acids, there was no decrease in GCase activity or substrate accumulation. However, GBA1bm/m mutant flies presented a significant decrease in GCase activity with concomitant substrate accumulation, which included C14:1 glucosylceramide and C14:0 glucosylsphingosine. GBA1bm/m mutant flies showed activation of the Unfolded Protein Response (UPR) and presented inflammation and neuroinflammation that culminated in development of a neuronopathic disease. Treatment with ambroxol did not rescue GCase activity or reduce substrate accumulation; however, it ameliorated UPR, inflammation and neuroinflammation, and increased life span. Our results highlight the resemblance between the phenotype of the GBA1bm/m mutant fly and neuronopathic GD and underlie its relevance in further GD studies as well as a model to test possible therapeutic modalities.

scholarly journals Endoplasmic Reticulum Stress in theβ-Cell Pathogenesis of Type 2 Diabetes

2012 ◽  
Vol 2012 ◽  
pp. 1-11 ◽  
Author(s):  
Sung Hoon Back ◽  
Sang-Wook Kang ◽  
Jaeseok Han ◽  
Hun-Taeg Chung
Keyword(s):  
Type 2 Diabetes ◽  
Er Stress ◽  
Clinical Evidence ◽  
High Blood Glucose ◽  
Unfolded Protein ◽  
Cell Dysfunction ◽  
The Unfolded Protein Response ◽  
Protein Response ◽  
Metabolic Stresses

Type 2 diabetes is a complex metabolic disorder characterized by high blood glucose in the context of insulin resistance and relative insulin deficiency byβ-cell failure. Even if the mechanisms underlying the pathogenesis ofβ-cell failure are still under investigation, recent increasing genetic, experimental, and clinical evidence indicate that hyperactivation of the unfolded protein response (UPR) to counteract metabolic stresses is closely related toβ-cell dysfunction and apoptosis. Signaling pathways of the UPR are “a double-edged sword” that can promote adaptation or apoptosis depending on the nature of the ER stress condition. In this paper, we summarized our current understanding of the mechanisms and components related to ER stress in theβ-cell pathogenesis of type 2 diabetes.

scholarly journals Restoration of the Unfolded Protein Response in Pancreatic   Cells Protects Mice Against Type 1 Diabetes

2013 ◽  
Vol 5 (211) ◽  
pp. 211ra156-211ra156 ◽  
Author(s):  
F. Engin ◽  
A. Yermalovich ◽  
T. Nguyen ◽  
S. Hummasti ◽  
W. Fu ◽  
...  
Keyword(s):  
Type 1 Diabetes ◽  
Unfolded Protein Response ◽  
Unfolded Protein ◽  
Pancreatic Cells ◽  
The Unfolded Protein Response ◽  
Protein Response

scholarly journals Epidermal Abnormalities May Distinguish Type 2 from Type 1 and Type 3 of Gaucher Disease

1996 ◽  
Vol 39 (1) ◽  
pp. 134-141 ◽  
Author(s):  
Ellen Sidransky ◽  
Manigé Fartasch ◽  
Robert E Lee ◽  
Leon A Metlay ◽  
Steve Abella ◽  
...  
Keyword(s):  
Gaucher Disease ◽  
Type 3

scholarly journals Gaucher disease: clinical phenotypes and refining GBA mutational spectrum in Thai patients

2021 ◽  
Vol 16 (1) ◽  
Author(s):  
Tim Phetthong ◽  
Thipwimol Tim-Aroon ◽  
Arthaporn Khongkraparn ◽  
Saisuda Noojarern ◽  
Chulaluck Kuptanon ◽  
...  
Keyword(s):  
Gaucher Disease ◽  
Age Of Onset ◽  
Lysosomal Storage ◽  
Pathogenic Variants ◽  
Medical Centers ◽  
Neurologic Involvement ◽  
Therapeutic Research ◽  
Type 3

Abstract Background Gaucher disease (GD) is a rare lysosomal storage disorder, characterized by hepatosplenomegaly and pancytopenia, with or without neurologic involvement. The disorder is categorized into three phenotypes: GD type 1 or nonneuronopathic GD; GD type 2 or acute neuronopathic GD; and GD type 3 or chronic neuronopathic GD. The purposes of this study were to describe clinical characteristics of Thai GD in patients diagnosed and/or followed up during 2010–2018 and to perform re-genotyping including analysis of GBA recombinant alleles which had not been investigated in Thai patients before. Results There were 27 patients from seven medical centers, enrolled in the study. All the cases had pediatric onset. GD3 (44.5%) was the most common phenotype, followed by GD2 (40.7%) and GD1 (14.8%), with one case of neonatal GD. The median age of onset for GD1, GD2, and GD3 was 72, 4 and 12 months, respectively, suggesting relatively earlier onset of GD1 and GD3 in Thai patients. All patients with GD1 and most patients with GD3 received ERT. Four patients with GD3 had ERT followed by HSCT. Patients with GD3 who received no or late ERT showed unfavorable outcomes. We identified 14 variants including two novel (p.S384F and p.W533*) and 12 reported pathogenic variants: p.L483P, p.N409S, p.R159W, p.P305A, p.A175G, p.D448H, p.V414L, IVS2+1G>A, IVS6-1G>C, IVS7+1G>C, IVS9-3C>G, and Rec1a. The p.L483P was the most prevalent allele found in this study, at 66% (33/50 alleles), followed by IVS2+1G>A, Rec1a, and IVS6-1G>C. Twenty-four percent of patients were reassigned with validated genotypes, most of whom (4 of 6) were patients with GD2. The [p.S384F + p.W533*] being compounded with p.L483P, was found in the patient with neonatal GD, suggesting that the p.S384F could potentiate the deleterious effect of the p.W533*, and/or vice versa. Conclusions Neuronopathic GD was strikingly prevalent among Thai affected population. Homozygous p.L483P was the most common genotype identified in Thai patients. Recombinant allele Rec1a and splicing mutations were associated with GD2 and severe cases of GD3. Mutation spectrum could be useful for designing stepwise molecular analysis, genetic screenings in population, and new therapeutic research for neuronopathic GD.

scholarly journals SARS-CoV-2 ORF3a Induces Incomplete Autophagy via the Unfolded Protein Response

Viruses ◽  
2021 ◽  
Vol 13 (12) ◽  
pp. 2467
Author(s):  
Wenqing Su ◽  
Xuejie Yu ◽  
Chuanmin Zhou
Keyword(s):  
Unfolded Protein Response ◽  
Viral Infections ◽  
Dependent Manner ◽  
Therapeutic Modalities ◽  
Unfolded Protein ◽  
The Past ◽  
The Unfolded Protein Response ◽  
Protein Response ◽  
Upr Pathway

In the past year and a half, SARS-CoV-2 has caused 240 million confirmed cases and 5 million deaths worldwide. Autophagy is a conserved process that either promotes or inhibits viral infections. Although coronaviruses are known to utilize the transport of autophagy-dependent vesicles for the viral life cycle, the underlying autophagy-inducing mechanisms remain largely unexplored. Using several autophagy-deficient cell lines and autophagy inhibitors, we demonstrated that SARS-CoV-2 ORF3a was able to induce incomplete autophagy in a FIP200/Beclin-1-dependent manner. Moreover, ORF3a was involved in the induction of the UPR (unfolded protein response), while the IRE1 and ATF6 pathways, but not the PERK pathway, were responsible for mediating the ORF3a-induced autophagy. These results identify the role of the UPR pathway in the ORF3a-induced classical autophagy process, which may provide us with a better understanding of SARS-CoV-2 and suggest new therapeutic modalities in the treatment of COVID-19.

scholarly journals Gaucher's Disease- A case report

2014 ◽  
Vol 3 (2) ◽  
pp. 45-48
Author(s):  
ASM Ruhul Quddush ◽  
Md Kamruzzaman ◽  
Md Badruzzaman ◽  
Mirja Hamidul Haque ◽  
Nazma Parvin Ansari ◽  
...  
Keyword(s):  
Gaucher Disease ◽  
Abdominal Distension ◽  
Disease Type ◽  
X Ray ◽  
Enzyme Replacement ◽  
Gaucher Disease Type 1 ◽  
Form Type ◽  
Type 3

A 3 years old immunized girl of consanguineous parents presented abdominal distension with hepatosplenomegaly. She was moderately anemic, moderately wasted and stunted. Neurological examination was normal. Musculoskeletal system examination revealed no abnormality. Diagnosis was supported by typical bone involvement in X-ray film (thin cortex in limb bone) and gaucher cell in the bone marrow and also in the splenic aspiration. There are three subtypes Type1: Non neuropathic form, Type 2: Acute neuropathic form, Type 3: Chronic neuropathic form. However some cases do not fit precisely into one of these categories. All forms of Gaucher disease are autosomal recessively inherited. So, this patient more or less correlates with Gaucher disease type 1. Treatment option for type 1 and 3 include medicine and enzyme replacement therapy, which is usually very effective. CBMJ 2014 July: Vol. 03 No. 02 P: 45-48

scholarly journals Gaucher disease: clinical phenotypes and refining GBA mutational spectrum in Thai patients

2021 ◽  
Author(s):  
Tim Phetthong ◽  
Thipwimol Tim-Aroon ◽  
Arthaporn Khongkraparn ◽  
Saisuda Noojarern ◽  
Chulaluck Kuptanon ◽  
...  
Keyword(s):  
Gaucher Disease ◽  
Age Of Onset ◽  
Lysosomal Storage ◽  
Pathogenic Variants ◽  
Medical Centers ◽  
Neurologic Involvement ◽  
Therapeutic Research ◽  
Type 3

Abstract Background Gaucher disease (GD is a rare lysosomal storage disorder, characterized by hepatosplenomegaly and pancytopenia, with or without neurologic involvement. The disorder is categorized into three phenotypes: GD type 1 or nonneuronopathic GD; GD type 2 or acute neuronopathic GD; and GD type 3 or chronic neuronopathic GD. The purposes of this study were to describe clinical characteristics of Thai GD in patients diagnosed and/or followed up during 2010–2018 and to perform re-genotyping including analysis of GBA recombinant alleles which had not been investigated in Thai patients before. Results There were 27 patients from seven medical centers, enrolled in the study. All the cases had pediatric onset. GD3 (44.5%) was the most common phenotype, followed by GD2 (40.7%) and GD1 (14.8%), with one case of neonatal GD. The median age of onset for GD1, GD2, and GD3 was 72, 4 and 12 months, respectively, suggesting relatively earlier onset of GD1 and GD3 in Thai patients. All patients with GD1 and most patients with GD3 received ERT. Four patients with GD3 had ERT followed by HSCT. Patients with GD3 who received no or late ERT showed unfavorable outcomes. We identified 14 mutations including two novel (p.S384F and p.W533*) and 12 reported pathogenic variants: p.L483P, p.N409S, p.R159W, p.P305A, p.A175G, p.D448H, p.V414L, IVS2 + 1G > A, IVS6-1G > C, IVS7 + 1G > C, IVS9-3C > G, and Rec1a. The p.L483P was the most prevalent allele found in this study, at 66% (33/50 alleles), followed by IVS2 + 1G > A, Rec1a, and IVS6-1G > C. Twenty-four percent of patients were reassigned with validated genotypes, most of whom (4 of 6) were patients with GD2. The [p.S384F + p.W533*] being compounded with p.L483P, was found in the patient with neonatal GD, suggesting that the p.S384F could potentiate the deleterious effect of the p.W533*, and/or vice versa. Conclusions Neuronopathic GD was strikingly prevalent among Thai affected population. Homozygous p.L483P was the most common genotype identified in Thai patients. Recombinant allele Rec1a and splicing mutations were associated with GD2 and severe cases of GD3. Mutation spectrum could be useful for designing stepwise molecular analysis, genetic screenings in population, and new therapeutic research for neuronopathic GD.

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