Ontology highlight
ABSTRACT:
PROVIDER: PRJNA661347 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR12586540_1.fastq.gz | Fastqsanger.gz | |||
| SRR12586540_2.fastq.gz | Fastqsanger.gz | |||
| SRR12586541_1.fastq.gz | Fastqsanger.gz | |||
| SRR12586541_2.fastq.gz | Fastqsanger.gz | |||
| SRR12586542_1.fastq.gz | Fastqsanger.gz |
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Project description:Methylmalonic acidemia (MMA), an organic acidemia characterized by metabolic instability and multiorgan complications, is most frequently caused by mutations in methylmalonyl-CoA mutase (MUT). To define the metabolic adaptations in MMA, in the chronic and acute settings, we studied a mouse model generated by transgenic expression of Mut in the muscle. Mut-/-;TgINS-MCK-Mut mice accurately replicate the hepato-renal mitochondriopathy and growth failure seen in severely affected patients, and were used to characterize the response to fasting. The hepatic transcriptome in MMA mice was characterized by the chronic activation of stress-related pathways and responded abberrantly to fasting when compared to controls.
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Project description:Hormesis underlies the adaptive response in methylmalonic acidemia (MMA)
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Project description:Methylmalonic acidemia (MMA) is a rare inborn error of propionate metabolism caused by deficiency of the mitochondrial methylmalonyl-CoA mutase (MUT) enzyme. As matter of fact, MMA patients manifest impairment of the primary metabolic network with profound damages that involve several cell components, many of which have not been discovered yet. We employed cellular models and patients-derived fibroblasts to refine and uncover new pathologic mechanisms connected with MUT deficiency through the combination of multi-proteomics and bioinformatics approaches.
2024-05-23 | PXD044101 | Pride
Project description:Methylmalonic acidemia (MMA) is one of the most common inherited metabolic disorders, due to deficiency of the mitochondrial methylmalonyl ̶ coenzyme A mutase (MUT). How MUT deficiency triggers mitochondrial alterations and cell damage remains unknown, preventing the development of disease-modifying therapies. To assess the effect of MUT deficiency on gene expression we investigated the transcriptome of in kidney cells derived from healthy controls or patients with MMA who harbor inactivating mutations in MUT. Microarray data indicate that MUT deficiency induces a profound and global change in gene expression that may be in part responsible of cellular alterations observed in patient cells.
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Project description:Targeting proximal tubule mitochondrial dysfunction attenuates the renal disease of methylmalonic acidemia
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Project description:Cobalamin C deficiency (cblC), the most common inborn error of intracellular cobalamin metabolism, is caused by mutations in MMACHC, a gene responsible for the processing and intracellular trafficking of vitamin B12. This recessive disorder is characterized by a failure to metabolize cobalamin into adenosyl- and methylcobalamin, which results in the biochemical perturbations of methylmalonic acidemia, hyperhomocysteinemia, and hypomethioninemia caused by impaired activity of the downstream enzymes, methylmalonyl-CoA mutase and methionine synthase. Cobalamin C deficiency can be accompanied by a wide spectrum of clinical manifestations, including progressive blindness, and in mice, manifests with very early embryonic lethality. Because zebrafish harbor a full complement of cobalamin metabolic enzymes, we used genome editing to study loss of mmachc function. mmachc homozygotes survived the embryonic period but perished in early juvenile life. The mutants displayed metabolic and clinical features of cblC deficiency including methylmalonic acidemia, severe growth retardation, and lethality. Clinical and metabolic parameters improved when the mutants were raised in water supplemented with small molecules used to treat patients, including hydroxocobalamin, methylcobalamin, methionine, and betaine. Furthermore, mmachc mutants, some bred to express rod and or cone fluorescent reporters, manifested a retinopathy and thin optic nerves. Expression analysis using whole eye mRNA revealed dysregulation of genes involved in phototransduction and cholesterol metabolism. Zebrafish with mmachc deficiency recapitulate the phenotypic and biochemical features of the human disorder, including ocular pathology, and a show a response to established treatments
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Project description:Isolated methylmalonic acidemia (MMA) is a pleiotropic enzymatic defect of branched-chain amino acid oxidation most commonly caused by deficiency of methylmalonyl-CoA mutase (MUT). End stage renal disease (ESRD) is emerging as an inevitable disease-related complication, recalcitrant to conventional therapies and liver transplantation. To establish a viable model of MMA-associated renal disease, methylmalonyl-CoA mutase (Mut) was expressed in the liver of Mut -/- mice as a stable transgene under the control of an albumin (INS-Alb-Mut) promoter. Mut -/- ;TgINS-Alb-Mut mice were rescued from the neonatal lethality displayed by Mut -/- mice and manifested a decreased glomerular filtration rate (GFR), chronic tubulointerstital nephritis (CTIN) and prominent ultrastructural changes in the proximal tubular mitochondria, replicating precisely the renal manifestations seen in a large MMA patient cohort.
2013-05-01 | GSE41044 | GEO
Project description:Isolated methylmalonic acidemia (MMA) is a pleiotropic enzymatic defect of branched-chain amino acid oxidation most commonly caused by deficiency of methylmalonyl-CoA mutase (MUT). End stage renal disease (ESRD) is emerging as an inevitable disease-related complication, recalcitrant to conventional therapies and liver transplantation. To establish a viable model of MMA-associated renal disease, methylmalonyl-CoA mutase (Mut) was expressed in the liver of Mut -/- mice as a stable transgene under the control of an albumin (INS-Alb-Mut) promoter. Mut -/- ;TgINS-Alb-Mut mice were rescued from the neonatal lethality displayed by Mut -/- mice and manifested a decreased glomerular filtration rate (GFR), chronic tubulointerstital nephritis (CTIN) and prominent ultrastructural changes in the proximal tubular mitochondria, replicating precisely the renal manifestations seen in a large MMA patient cohort. To explore the pathophysiological changes that underlie the renal disease of MMA, we compared gene expression profiles of whole kidney mRNA samples between 4 female Mut +/+, Mut +/- and Mut -/- ;TgINS-Alb-Mut mice after they ingested a HP diet for 2 months. Females were used because more survived the dietary challenge, whereas the histology, ultrastructure and GFR effects were identical between sexes
2013-05-01 | E-GEOD-41044 | biostudies-arrayexpress
Project description:CblX is a recently described X-linked variant of combined methylmalonic acidemia and homocystinuria, cblC type, which is the most common inborn error of intracellular cobalamin metabolism. While cblC is due to mutations in MMACHC, which is in the cobalamin metabolic pathway, cblX is caused by mutations in the transcriptional cofactor HCFC1 and its obligate transcription factor partner RONIN . Since HCFC1 and RONIN jointly regulate MMACHC transcription, cblX patients suffer from low levels of MMACHC during development and thus develop a disease highly similar to cblC. Beyond this finding, there is little else known about the other genes de-regulated in cblX and the resulting pathophysiology. Therefore, we have generated the first mouse models of this disease (Hcfc1A115V/Y and RoninF80L/F80L). We show that our cblX models exhibit the expected metabolic perturbations, along with CNS, hematopoietic and cardiac developmental defects, typically observed in cblC patients. We also uncovered a large cohort of target genes that encode ribosome protein subunits as well as unexpected phenotypes that we ascribe to deregulation of ribosome biogenesis impacting normal translation during development. In addition to identifying RONIN and HCFC1 as new transcriptional regulators of ribosome biogenesis, we establish cblX as a complex syndrome exhibiting aspects of cblC and a ribosomopathy.
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