LIVIVO - The Search Portal for Life Sciences

zur deutschen Oberfläche wechseln
Advanced search

Search results

Result 1 - 10 of total 66

Search options

  1. Article: Induced pluripotent stem cell-derived hepatocytes reveal TCA cycle disruption and the potential basis for triheptanoin treatment for malate dehydrogenase 2 deficiency.

    Mathis, Déborah / Koch, Jasmine / Koller, Sophie / Sauter, Kay / Flück, Christa / Uldry, Anne-Christine / Forny, Patrick / Froese, D Sean / Laemmle, Alexander

    Molecular genetics and metabolism reports

    2024  Volume 39, Page(s) 101066

    Abstract: Mitochondrial malate dehydrogenase 2 (MDH2) is crucial to cellular energy generation through direct participation in the tricarboxylic acid (TCA) cycle and the malate aspartate shuttle (MAS). Inherited MDH2 deficiency is an ultra-rare metabolic disease ... ...

    Abstract Mitochondrial malate dehydrogenase 2 (MDH2) is crucial to cellular energy generation through direct participation in the tricarboxylic acid (TCA) cycle and the malate aspartate shuttle (MAS). Inherited MDH2 deficiency is an ultra-rare metabolic disease caused by bi-allelic pathogenic variants in the
    Synopsis: This study reveals altered expression of mitochondrial pathways including the tricarboxylic acid cycle and changes in metabolite profiles in malate dehydrogenase 2 deficiency and provides the molecular basis for triheptanoin treatment in this ultra-rare disease.
    Language English
    Publishing date 2024-02-23
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2821908-9
    ISSN 2214-4269
    ISSN 2214-4269
    DOI 10.1016/j.ymgmr.2024.101066
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  2. Article ; Online: The complex machinery of human cobalamin metabolism.

    McCorvie, Thomas J / Ferreira, Douglas / Yue, Wyatt W / Froese, D Sean

    Journal of inherited metabolic disease

    2023  Volume 46, Issue 3, Page(s) 406–420

    Abstract: ... Vitamin ... ...

    Abstract Vitamin B
    MeSH term(s) Humans ; Vitamin B 12/metabolism ; Methylmalonyl-CoA Mutase/metabolism ; Biological Transport ; Molecular Chaperones ; ATP-Binding Cassette Transporters/metabolism ; Oxidoreductases/metabolism
    Chemical Substances Vitamin B 12 (P6YC3EG204) ; Methylmalonyl-CoA Mutase (EC 5.4.99.2) ; Molecular Chaperones ; ABCD4 protein, human ; ATP-Binding Cassette Transporters ; MMACHC protein, human (EC 1.-) ; Oxidoreductases (EC 1.-)
    Language English
    Publishing date 2023-02-08
    Publishing country United States
    Document type Journal Article ; Review ; Research Support, Non-U.S. Gov't
    ZDB-ID 438341-2
    ISSN 1573-2665 ; 0141-8955
    ISSN (online) 1573-2665
    ISSN 0141-8955
    DOI 10.1002/jimd.12593
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  3. Article ; Online: Dynamic inter-domain transformations mediate the allosteric regulation of human 5, 10-methylenetetrahydrofolate reductase.

    Blomgren, Linnea K M / Huber, Melanie / Mackinnon, Sabrina R / Bürer, Céline / Baslé, Arnaud / Yue, Wyatt W / Froese, D Sean / McCorvie, Thomas J

    Nature communications

    2024  Volume 15, Issue 1, Page(s) 3248

    Abstract: 5,10-methylenetetrahydrofolate reductase (MTHFR) commits folate-derived one-carbon units to generate the methyl-donor S-adenosyl-L-methionine (SAM). Eukaryotic MTHFR appends to the well-conserved catalytic domain (CD) a unique regulatory domain (RD) that ...

    Abstract 5,10-methylenetetrahydrofolate reductase (MTHFR) commits folate-derived one-carbon units to generate the methyl-donor S-adenosyl-L-methionine (SAM). Eukaryotic MTHFR appends to the well-conserved catalytic domain (CD) a unique regulatory domain (RD) that confers feedback inhibition by SAM. Here we determine the cryo-electron microscopy structures of human MTHFR bound to SAM and its demethylated product S-adenosyl-L-homocysteine (SAH). In the active state, with the RD bound to a single SAH, the CD is flexible and exposes its active site for catalysis. However, in the inhibited state the RD pocket is remodelled, exposing a second SAM-binding site that was previously occluded. Dual-SAM bound MTHFR demonstrates a substantially rearranged inter-domain linker that reorients the CD, inserts a loop into the active site, positions Tyr404 to bind the cofactor FAD, and blocks substrate access. Our data therefore explain the long-distance regulatory mechanism of MTHFR inhibition, underpinned by the transition between dual-SAM and single-SAH binding in response to cellular methylation status.
    MeSH term(s) Humans ; Allosteric Regulation ; Methylenetetrahydrofolate Reductase (NADPH2)/chemistry ; Cryoelectron Microscopy ; S-Adenosylmethionine/metabolism ; Methylation
    Chemical Substances Methylenetetrahydrofolate Reductase (NADPH2) (EC 1.5.1.20) ; S-Adenosylmethionine (7LP2MPO46S)
    Language English
    Publishing date 2024-04-15
    Publishing country England
    Document type Journal Article
    ZDB-ID 2553671-0
    ISSN 2041-1723 ; 2041-1723
    ISSN (online) 2041-1723
    ISSN 2041-1723
    DOI 10.1038/s41467-024-47174-y
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  4. Article ; Online: Cellular and computational models reveal environmental and metabolic interactions in MMUT-type methylmalonic aciduria.

    Ramon, Charlotte / Traversi, Florian / Bürer, Céline / Froese, D Sean / Stelling, Jörg

    Journal of inherited metabolic disease

    2022  Volume 46, Issue 3, Page(s) 421–435

    Abstract: Methylmalonyl-coenzyme A (CoA) mutase (MMUT)-type methylmalonic aciduria is a rare inherited metabolic disease caused by the loss of function of the MMUT enzyme. Patients develop symptoms resembling those of primary mitochondrial disorders, but the ... ...

    Abstract Methylmalonyl-coenzyme A (CoA) mutase (MMUT)-type methylmalonic aciduria is a rare inherited metabolic disease caused by the loss of function of the MMUT enzyme. Patients develop symptoms resembling those of primary mitochondrial disorders, but the underlying causes of mitochondrial dysfunction remain unclear. Here, we examined environmental and genetic interactions in MMUT deficiency using a combination of computational modeling and cellular models to decipher pathways interacting with MMUT. Immortalized fibroblast (hTERT BJ5ta) MMUT-KO (MUTKO) clones displayed a mild mitochondrial impairment in standard glucose-based medium, but they did not to show increased reliance on respiratory metabolism nor reduced growth or viability. Consistently, our modeling predicted MUTKO specific growth phenotypes only for lower extracellular glutamine concentrations. Indeed, two of three MMUT-deficient BJ5ta cell lines showed a reduced viability in glutamine-free medium. Further, growth on 183 different carbon and nitrogen substrates identified increased NADH (nicotinamide adenine dinucleotide) metabolism of BJ5ta and HEK293 MUTKO cells compared with controls on purine- and glutamine-based substrates. With this knowledge, our modeling predicted 13 reactions interacting with MMUT that potentiate an effect on growth, primarily those of secondary oxidation of propionyl-CoA, oxidative phosphorylation and oxygen diffusion. Of these, we validated 3-hydroxyisobutytyl-CoA hydrolase (HIBCH) in the secondary propionyl-CoA oxidation pathway. Altogether, these results suggest compensation for the loss of MMUT function by increasing anaplerosis through glutamine or by diverting flux away from MMUT through the secondary propionyl-CoA oxidation pathway, which may have therapeutic relevance.
    MeSH term(s) Humans ; HEK293 Cells ; Amino Acid Metabolism, Inborn Errors/diagnosis ; Mitochondrial Diseases/metabolism ; Methylmalonyl-CoA Mutase ; Methylmalonic Acid/metabolism
    Chemical Substances Methylmalonyl-CoA Mutase (EC 5.4.99.2) ; Methylmalonic Acid (8LL8S712J7)
    Language English
    Publishing date 2022-11-23
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 438341-2
    ISSN 1573-2665 ; 0141-8955
    ISSN (online) 1573-2665
    ISSN 0141-8955
    DOI 10.1002/jimd.12575
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  5. Article ; Online: Vitamin B

    Froese, D Sean / Fowler, Brian / Baumgartner, Matthias R

    Journal of inherited metabolic disease

    2019  Volume 42, Issue 4, Page(s) 673–685

    Abstract: ... Vitamin ... ...

    Abstract Vitamin B
    MeSH term(s) 5-Methyltetrahydrofolate-Homocysteine S-Methyltransferase/metabolism ; Animals ; Folic Acid/pharmacology ; Folic Acid Deficiency/metabolism ; Humans ; Methylmalonyl-CoA Mutase/metabolism ; Vitamin B 12/pharmacology ; Vitamin B 12 Deficiency/metabolism
    Chemical Substances Folic Acid (935E97BOY8) ; 5-Methyltetrahydrofolate-Homocysteine S-Methyltransferase (EC 2.1.1.13) ; Methylmalonyl-CoA Mutase (EC 5.4.99.2) ; Vitamin B 12 (P6YC3EG204)
    Language English
    Publishing date 2019-01-28
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Review
    ZDB-ID 438341-2
    ISSN 1573-2665 ; 0141-8955
    ISSN (online) 1573-2665
    ISSN 0141-8955
    DOI 10.1002/jimd.12009
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  6. Article ; Online: Mitochondrial disease, mitophagy, and cellular distress in methylmalonic acidemia.

    Luciani, Alessandro / Denley, Matthew C S / Govers, Larissa P / Sorrentino, Vincenzo / Froese, D Sean

    Cellular and molecular life sciences : CMLS

    2021  Volume 78, Issue 21-22, Page(s) 6851–6867

    Abstract: Mitochondria-the intracellular powerhouse in which nutrients are converted into energy in the form of ATP or heat-are highly dynamic, double-membraned organelles that harness a plethora of cellular functions that sustain energy metabolism and homeostasis. ...

    Abstract Mitochondria-the intracellular powerhouse in which nutrients are converted into energy in the form of ATP or heat-are highly dynamic, double-membraned organelles that harness a plethora of cellular functions that sustain energy metabolism and homeostasis. Exciting new discoveries now indicate that the maintenance of this ever changing and functionally pleiotropic organelle is particularly relevant in terminally differentiated cells that are highly dependent on aerobic metabolism. Given the central role in maintaining metabolic and physiological homeostasis, dysregulation of the mitochondrial network might therefore confer a potentially devastating vulnerability to high-energy requiring cell types, contributing to a broad variety of hereditary and acquired diseases. In this Review, we highlight the biological functions of mitochondria-localized enzymes from the perspective of understanding-and potentially reversing-the pathophysiology of inherited disorders affecting the homeostasis of the mitochondrial network and cellular metabolism. Using methylmalonic acidemia as a paradigm of complex mitochondrial dysfunction, we discuss how mitochondrial directed-signaling circuitries govern the homeostasis and physiology of specialized cell types and how these may be disturbed in disease. This Review also provides a critical analysis of affected tissues, potential molecular mechanisms, and novel cellular and animal models of methylmalonic acidemia which are being used to develop new therapeutic options for this disease. These insights might ultimately lead to new therapeutics, not only for methylmalonic acidemia, but also for other currently intractable mitochondrial diseases, potentially transforming our ability to regulate homeostasis and health.
    MeSH term(s) Amino Acid Metabolism, Inborn Errors/metabolism ; Animals ; Energy Metabolism/physiology ; Homeostasis/physiology ; Humans ; Mitochondria/metabolism ; Mitochondrial Diseases/metabolism ; Mitophagy/physiology ; Organelles/metabolism ; Signal Transduction/physiology
    Language English
    Publishing date 2021-09-15
    Publishing country Switzerland
    Document type Journal Article ; Review
    ZDB-ID 1358415-7
    ISSN 1420-9071 ; 1420-682X
    ISSN (online) 1420-9071
    ISSN 1420-682X
    DOI 10.1007/s00018-021-03934-3
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  7. Article ; Online: HIF1 and DROSHA are involved in MMACHC repression in hypoxia.

    Kiessling, Eva / Peters, Florian / Ebner, Lynn J A / Merolla, Luca / Samardzija, Marijana / Baumgartner, Matthias R / Grimm, Christian / Froese, D Sean

    Biochimica et biophysica acta. General subjects

    2022  Volume 1866, Issue 9, Page(s) 130175

    Abstract: The MMACHC gene encodes for an enzyme involved in intracellular vitamin ... ...

    Abstract The MMACHC gene encodes for an enzyme involved in intracellular vitamin B
    MeSH term(s) Animals ; HeLa Cells ; Humans ; Hypoxia ; Hypoxia-Inducible Factor 1/metabolism ; Mice ; MicroRNAs ; Oxidoreductases ; Repressor Proteins/genetics ; Ribonuclease III/genetics ; Trans-Activators ; Transcription Factors ; Vitamin B 12/genetics ; Vitamin B 12/metabolism ; Vitamins
    Chemical Substances Hypoxia-Inducible Factor 1 ; MicroRNAs ; Repressor Proteins ; THAP11 protein, human ; Thap11 protein, mouse ; Trans-Activators ; Transcription Factors ; Vitamins ; ZNF143 protein, human ; MMACHC protein, human (EC 1.-) ; Oxidoreductases (EC 1.-) ; DROSHA protein, human (EC 3.1.26.3) ; Ribonuclease III (EC 3.1.26.3) ; Vitamin B 12 (P6YC3EG204)
    Language English
    Publishing date 2022-05-28
    Publishing country Netherlands
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 60-7
    ISSN 1872-8006 ; 1879-2596 ; 1879-260X ; 1879-2642 ; 1879-2618 ; 1879-2650 ; 0006-3002 ; 0005-2728 ; 0005-2736 ; 0304-4165 ; 0167-4838 ; 1388-1981 ; 0167-4889 ; 0167-4781 ; 0304-419X ; 1570-9639 ; 0925-4439 ; 1874-9399
    ISSN (online) 1872-8006 ; 1879-2596 ; 1879-260X ; 1879-2642 ; 1879-2618 ; 1879-2650
    ISSN 0006-3002 ; 0005-2728 ; 0005-2736 ; 0304-4165 ; 0167-4838 ; 1388-1981 ; 0167-4889 ; 0167-4781 ; 0304-419X ; 1570-9639 ; 0925-4439 ; 1874-9399
    DOI 10.1016/j.bbagen.2022.130175
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  8. Article ; Online: Spectrum and characterization of bi-allelic variants in MMAB causing cblB-type methylmalonic aciduria.

    Forny, Patrick / Plessl, Tanja / Frei, Caroline / Bürer, Celine / Froese, D Sean / Baumgartner, Matthias R

    Human genetics

    2021  Volume 141, Issue 7, Page(s) 1253–1267

    Abstract: Pathogenic variants in MMAB cause cblB-type methylmalonic aciduria, an autosomal-recessive disorder of propionate metabolism. MMAB encodes ATP:cobalamin adenosyltransferase, using ATP and cob(I)alamin to create 5'-deoxyadenosylcobalamin (AdoCbl), the ... ...

    Abstract Pathogenic variants in MMAB cause cblB-type methylmalonic aciduria, an autosomal-recessive disorder of propionate metabolism. MMAB encodes ATP:cobalamin adenosyltransferase, using ATP and cob(I)alamin to create 5'-deoxyadenosylcobalamin (AdoCbl), the cofactor of methylmalonyl-CoA mutase (MMUT). We identified bi-allelic disease-causing variants in MMAB in 97 individuals with cblB-type methylmalonic aciduria, including 33 different and 16 novel variants. Missense changes accounted for the most frequent pathogenic alleles (p.(Arg186Trp), N = 57; p.(Arg191Trp), N = 19); while c.700C > T (p.(Arg234*)) was the most frequently identified truncating variant (N = 14). In fibroblasts from 76 affected individuals, the ratio of propionate incorporation in the presence and absence of hydroxocobalamin (PI ratio) was associated to clinical cobalamin responsiveness and later disease onset. We found p.(Arg234*) to be associated with cobalamin responsiveness in vitro, and clinically with later onset; p.(Arg186Trp) and p.(Arg191Trp) showed no clear cobalamin responsiveness and early onset. Mapping these and novel variants onto the MMAB structure revealed their potential to affect ATP and AdoCbl binding. Follow-up biochemical characterization of recombinant MMAB identified its three active sites to be equivalent for ATP binding, determined by fluorescence spectroscopy (K
    MeSH term(s) Adaptor Proteins, Signal Transducing/metabolism ; Adenosine Triphosphate/chemistry ; Adenosine Triphosphate/metabolism ; Alkyl and Aryl Transferases/metabolism ; Alleles ; Amino Acid Metabolism, Inborn Errors/genetics ; Amino Acid Metabolism, Inborn Errors/pathology ; Humans ; Mutation ; Propionates ; Proto-Oncogene Proteins c-cbl/metabolism ; Vitamin B 12/metabolism
    Chemical Substances Adaptor Proteins, Signal Transducing ; Propionates ; Adenosine Triphosphate (8L70Q75FXE) ; CBLB protein, human (EC 2.3.2.27) ; Proto-Oncogene Proteins c-cbl (EC 2.3.2.27) ; Alkyl and Aryl Transferases (EC 2.5.-) ; Vitamin B 12 (P6YC3EG204)
    Language English
    Publishing date 2021-11-18
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 223009-4
    ISSN 1432-1203 ; 0340-6717
    ISSN (online) 1432-1203
    ISSN 0340-6717
    DOI 10.1007/s00439-021-02398-6
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  9. Article: Decrease of disease-related metabolites upon fasting in a hemizygous knock-in mouse model (

    Lucienne, Marie / Mathis, Déborah / Perkins, Nathan / Fingerhut, Ralph / Baumgartner, Matthias R / Froese, D Sean

    JIMD reports

    2020  Volume 58, Issue 1, Page(s) 44–51

    Abstract: Methylmalonyl-CoA mutase (MMUT) is part of the propionyl-CoA catabolic pathway, responsible for the breakdown of branched-chain amino acids, odd-chain fatty acids and the side-chain of cholesterol. Patients with deficient activity of MMUT suffer from ... ...

    Abstract Methylmalonyl-CoA mutase (MMUT) is part of the propionyl-CoA catabolic pathway, responsible for the breakdown of branched-chain amino acids, odd-chain fatty acids and the side-chain of cholesterol. Patients with deficient activity of MMUT suffer from isolated methylmalonic aciduria (MMAuria), frequently presenting in the newborn period with failure to thrive and metabolic crisis. Even well managed patients remain at risk for metabolic crises, of which one known trigger is acute illness, which may lead to poor feeding and vomiting, putting the patient in a catabolic state. This situation is believed to result in increased breakdown of propionyl-CoA catabolic pathway precursors, producing massively elevated levels of disease related metabolites, including methylmalonic acid and propionylcarnitine. Here, we used fasting of a hemizygous mouse model (
    Language English
    Publishing date 2020-11-08
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2672872-2
    ISSN 2192-8312 ; 2192-8304
    ISSN (online) 2192-8312
    ISSN 2192-8304
    DOI 10.1002/jmd2.12182
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  10. Article: Mitochondrial disease, mitophagy, and cellular distress in methylmalonic acidemia

    Luciani, Alessandro / Denley, Matthew C. S. / Govers, Larissa P. / Sorrentino, Vincenzo / Froese, D. Sean

    Cellular and molecular life sciences. 2021 Nov., v. 78, no. 21-22

    2021  

    Abstract: Mitochondria—the intracellular powerhouse in which nutrients are converted into energy in the form of ATP or heat—are highly dynamic, double-membraned organelles that harness a plethora of cellular functions that sustain energy metabolism and homeostasis. ...

    Abstract Mitochondria—the intracellular powerhouse in which nutrients are converted into energy in the form of ATP or heat—are highly dynamic, double-membraned organelles that harness a plethora of cellular functions that sustain energy metabolism and homeostasis. Exciting new discoveries now indicate that the maintenance of this ever changing and functionally pleiotropic organelle is particularly relevant in terminally differentiated cells that are highly dependent on aerobic metabolism. Given the central role in maintaining metabolic and physiological homeostasis, dysregulation of the mitochondrial network might therefore confer a potentially devastating vulnerability to high-energy requiring cell types, contributing to a broad variety of hereditary and acquired diseases. In this Review, we highlight the biological functions of mitochondria-localized enzymes from the perspective of understanding—and potentially reversing—the pathophysiology of inherited disorders affecting the homeostasis of the mitochondrial network and cellular metabolism. Using methylmalonic acidemia as a paradigm of complex mitochondrial dysfunction, we discuss how mitochondrial directed-signaling circuitries govern the homeostasis and physiology of specialized cell types and how these may be disturbed in disease. This Review also provides a critical analysis of affected tissues, potential molecular mechanisms, and novel cellular and animal models of methylmalonic acidemia which are being used to develop new therapeutic options for this disease. These insights might ultimately lead to new therapeutics, not only for methylmalonic acidemia, but also for other currently intractable mitochondrial diseases, potentially transforming our ability to regulate homeostasis and health.
    Keywords animals ; distress ; energy ; energy metabolism ; homeostasis ; mitochondria ; mitophagy ; pathophysiology ; therapeutics
    Language English
    Dates of publication 2021-11
    Size p. 6851-6867.
    Publishing place Springer International Publishing
    Document type Article
    Note Review
    ZDB-ID 1358415-7
    ISSN 1420-9071 ; 1420-682X
    ISSN (online) 1420-9071
    ISSN 1420-682X
    DOI 10.1007/s00018-021-03934-3
    Database NAL-Catalogue (AGRICOLA)

    More links

    Kategorien

To top