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  1. Article ; Online: Lipocalin-2 induces mitochondrial dysfunction in renal tubular cells via mTOR pathway activation.

    Marques, Eloïse / Alves Teixeira, Maraiza / Nguyen, Clément / Terzi, Fabiola / Gallazzini, Morgan

    Cell reports

    2023  Volume 42, Issue 9, Page(s) 113032

    Abstract: Mitochondrial dysfunction is a critical process in renal epithelial cells upon kidney injury. While its implication in kidney disease progression is established, the mechanisms modulating it remain unclear. Here, we describe the role of Lipocalin-2 (LCN2) ...

    Abstract Mitochondrial dysfunction is a critical process in renal epithelial cells upon kidney injury. While its implication in kidney disease progression is established, the mechanisms modulating it remain unclear. Here, we describe the role of Lipocalin-2 (LCN2), a protein expressed in injured tubular cells, in mitochondrial dysfunction. We show that LCN2 expression decreases mitochondrial mass and function and induces mitochondrial fragmentation. Importantly, while LCN2 expression favors DRP1 mitochondrial recruitment, DRP1 inhibition antagonizes LCN2's effect on mitochondrial shape. Remarkably, LCN2 promotes mitochondrial fragmentation independently of its secretion or transport iron activity. Mechanistically, intracellular LCN2 expression increases mTOR activity, and rapamycin inhibits LCN2's effect on mitochondrial shape. In vivo, Lcn2 gene inactivation prevents mTOR activation and mitochondrial length decrease observed upon ischemia-reperfusion-induced kidney injury (IRI) in Lcn2
    MeSH term(s) Mice ; Animals ; Lipocalin-2/genetics ; Lipocalin-2/metabolism ; Kidney/metabolism ; Reperfusion Injury/metabolism ; Epithelial Cells/metabolism ; TOR Serine-Threonine Kinases/metabolism ; Mitochondria/metabolism
    Chemical Substances Lipocalin-2 ; TOR Serine-Threonine Kinases (EC 2.7.11.1)
    Language English
    Publishing date 2023-08-24
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2649101-1
    ISSN 2211-1247 ; 2211-1247
    ISSN (online) 2211-1247
    ISSN 2211-1247
    DOI 10.1016/j.celrep.2023.113032
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Endoplasmic reticulum stress and kidney dysfunction.

    Gallazzini, Morgan / Pallet, Nicolas

    Biology of the cell

    2018  Volume 110, Issue 9, Page(s) 205–216

    Abstract: Chronic kidney disease (CKD) affects millions of persons worldwide and constitutes a major public health problem. Therefore, understanding the molecular basis of CKD is a key challenge for the development of preventive and therapeutic strategies. A major ...

    Abstract Chronic kidney disease (CKD) affects millions of persons worldwide and constitutes a major public health problem. Therefore, understanding the molecular basis of CKD is a key challenge for the development of preventive and therapeutic strategies. A major contributor to chronic histological damage associated with CKD is acute kidney injury (AKI). At the cellular level, kidney injuries are associated with microenvironmental alterations, forcing cells to activate adaptive biological processes that eliminate the stressor and generate alarm signals. These signalling pathways actively participate in tissue remodelling by promoting inflammation and fibrogenesis, ultimately leading to CKD. Many stresses that are encountered upon kidney injury are prone to trigger endoplasmic reticulum (ER) stress. In the kidney, ER stress both participates in acute and chronic histological damages, but also promotes cellular adaptation and nephroprotection. In this review, we will discuss the implication of ER stress in the pathophysiology of AKI and CKD progression, and we will give a critical analysis of the current experimental and clinical evidence that support ER stress as a mediator of kidney damage.
    MeSH term(s) Animals ; Endoplasmic Reticulum/metabolism ; Endoplasmic Reticulum Stress ; Humans ; Kidney/metabolism ; Kidney/physiopathology ; Kidney Diseases/metabolism ; Kidney Diseases/physiopathology ; Stress, Physiological ; Unfolded Protein Response
    Language English
    Publishing date 2018-08-01
    Publishing country England
    Document type Journal Article ; Review
    ZDB-ID 245745-3
    ISSN 1768-322X ; 0399-0311 ; 0248-4900
    ISSN (online) 1768-322X
    ISSN 0399-0311 ; 0248-4900
    DOI 10.1111/boc.201800019
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Lipocalin-2 Regulates Epidermal Growth Factor Receptor Intracellular Trafficking.

    Yammine, Lucie / Zablocki, Aniela / Baron, William / Terzi, Fabiola / Gallazzini, Morgan

    Cell reports

    2019  Volume 29, Issue 7, Page(s) 2067–2077.e6

    Abstract: Epidermal growth factor receptor (EGFR) activation and lipocalin-2 (Lcn2) expression are frequently observed in the same pathological contexts, such as cancers or chronic kidney disease (CKD). However, the significance of this association is unknown. ... ...

    Abstract Epidermal growth factor receptor (EGFR) activation and lipocalin-2 (Lcn2) expression are frequently observed in the same pathological contexts, such as cancers or chronic kidney disease (CKD). However, the significance of this association is unknown. Here, we describe the role of Lcn2 in regulating EGFR trafficking. We show that Lcn2 increases EGFR cell surface abundance and is required for transforming growth factor α (TGF-α)-induced EGFR recycling to the plasma membrane and sustained activation. Lcn2 binds to the intracellular domain of EGFR in late endosomal compartments and inhibits its lysosomal degradation. Consistently, Lcn2 enhances EGFR-induced cell migration after TGF-α stimulation. In vivo, Lcn2 gene inactivation prevents EGFR recycling to the plasma membrane in an experimental model of CKD. Remarkably, this is associated with a dramatic decrease of renal lesions. Together, our data identify Lcn2 as a key mediator of EGFR trafficking processes. Hence, therapeutic inhibition of Lcn2 may counteract the deleterious effect of EGFR activation.
    MeSH term(s) Animals ; Cell Membrane/genetics ; Cell Membrane/metabolism ; Cell Movement/drug effects ; Cell Movement/genetics ; Endosomes/genetics ; Endosomes/metabolism ; ErbB Receptors/genetics ; ErbB Receptors/metabolism ; Female ; Lipocalin-2/genetics ; Lipocalin-2/metabolism ; Mice ; Mice, Knockout ; Protein Transport/drug effects ; Protein Transport/genetics ; Renal Insufficiency, Chronic/genetics ; Renal Insufficiency, Chronic/metabolism ; Renal Insufficiency, Chronic/pathology ; Transforming Growth Factor alpha/pharmacology
    Chemical Substances Lipocalin-2 ; Transforming Growth Factor alpha ; Lcn2 protein, mouse (126469-30-5) ; EGFR protein, mouse (EC 2.7.10.1) ; ErbB Receptors (EC 2.7.10.1)
    Language English
    Publishing date 2019-11-12
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2649101-1
    ISSN 2211-1247 ; 2211-1247
    ISSN (online) 2211-1247
    ISSN 2211-1247
    DOI 10.1016/j.celrep.2019.10.015
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Lipocalin-2 Regulates Epidermal Growth Factor Receptor Intracellular Trafficking

    Lucie Yammine / Aniela Zablocki / William Baron / Fabiola Terzi / Morgan Gallazzini

    Cell Reports, Vol 29, Iss 7, Pp 2067-2077.e

    2019  Volume 6

    Abstract: Summary: Epidermal growth factor receptor (EGFR) activation and lipocalin-2 (Lcn2) expression are frequently observed in the same pathological contexts, such as cancers or chronic kidney disease (CKD). However, the significance of this association is ... ...

    Abstract Summary: Epidermal growth factor receptor (EGFR) activation and lipocalin-2 (Lcn2) expression are frequently observed in the same pathological contexts, such as cancers or chronic kidney disease (CKD). However, the significance of this association is unknown. Here, we describe the role of Lcn2 in regulating EGFR trafficking. We show that Lcn2 increases EGFR cell surface abundance and is required for transforming growth factor α (TGF-α)-induced EGFR recycling to the plasma membrane and sustained activation. Lcn2 binds to the intracellular domain of EGFR in late endosomal compartments and inhibits its lysosomal degradation. Consistently, Lcn2 enhances EGFR-induced cell migration after TGF-α stimulation. In vivo, Lcn2 gene inactivation prevents EGFR recycling to the plasma membrane in an experimental model of CKD. Remarkably, this is associated with a dramatic decrease of renal lesions. Together, our data identify Lcn2 as a key mediator of EGFR trafficking processes. Hence, therapeutic inhibition of Lcn2 may counteract the deleterious effect of EGFR activation. : Yammine et al. propose lipocalin-2 (Lcn2) as a regulator of EGFR activity. By binding to TGF-α-activated EGFR intracellular domain, cytosolic Lcn2 enhances its recycling to the cell surface. This accounts for EGFR sustained activation leading to chronic kidney disease and makes Lcn2 a potential therapeutic target in this context. Keywords: EGFR, lipocalin-2, recycling, trafficking, chronic kidney disease
    Keywords Biology (General) ; QH301-705.5
    Subject code 616
    Language English
    Publishing date 2019-11-01T00:00:00Z
    Publisher Elsevier
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  5. Article: What's new about osmotic regulation of glycerophosphocholine.

    Gallazzini, Morgan / Burg, Maurice B

    Physiology (Bethesda, Md.)

    2009  Volume 24, Page(s) 245–249

    Abstract: Glycerophosphocholine is an abundant renal medullary organic osmolyte that protects renal medullary cells from the high interstitial concentrations of NaCl and urea to which they are normally exposed. We consider the metabolism of glycerophosphocholine, ... ...

    Abstract Glycerophosphocholine is an abundant renal medullary organic osmolyte that protects renal medullary cells from the high interstitial concentrations of NaCl and urea to which they are normally exposed. We consider the metabolism of glycerophosphocholine, its osmotic regulation, and the recently discovered molecular identity of the enzymes that osmoregulate its abundance.
    MeSH term(s) Animals ; Glycerylphosphorylcholine/physiology ; Humans ; Kidney Medulla/cytology ; Kidney Medulla/physiology ; Sodium Chloride/metabolism ; Urea/metabolism ; Water-Electrolyte Balance/physiology
    Chemical Substances Sodium Chloride (451W47IQ8X) ; Glycerylphosphorylcholine (60M22SGW66) ; Urea (8W8T17847W)
    Language English
    Publishing date 2009-08-12
    Publishing country United States
    Document type Journal Article ; Review
    ZDB-ID 2158667-6
    ISSN 1548-9221 ; 1548-9213
    ISSN (online) 1548-9221
    ISSN 1548-9213
    DOI 10.1152/physiol.00009.2009
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Molecular pathways of chronic kidney disease progression.

    Bienaimé, Frank / Canaud, Guillaume / El Karoui, Khalil / Gallazzini, Morgan / Terzi, Fabiola

    Nephrologie & therapeutique

    2016  Volume 12 Suppl 1, Page(s) S35–8

    Abstract: Chronic kidney disease is characterized by the progressive loss of functional nephrons. This loss means that the remaining nephrons are put under stress and are forced to adapt in order to maintain kidney function. Over the time, the strains imposed by ... ...

    Abstract Chronic kidney disease is characterized by the progressive loss of functional nephrons. This loss means that the remaining nephrons are put under stress and are forced to adapt in order to maintain kidney function. Over the time, the strains imposed by these adaptations result in a vicious circle in which the loss of damaged nephrons results in the damage of the so far healthy nephrons. Hence, the rate of chronic kidney disease progression depends on the ability of the remaining nephrons to cope with stress. This article reviews the molecular pathways involved in the compensation and deterioration process after nephron reduction. In particular, we examine the role of mammalian target of rapamycin complex (mTORC)/serine-threonine protein kinase AKT, epidermal growth factor receptor (EGFR) and unfolded protein response pathways, as well as the pleiotropic function of Lipocalin 2. We also discuss the dual role played by some of these pathways in acute and chronic kidney disease. Finally, the relevance of these experimental finding to human chronic kidney disease is discussed.
    Language English
    Publishing date 2016-04
    Publishing country France
    Document type Journal Article
    ZDB-ID 2229575-6
    ISSN 1872-9177 ; 1769-7255
    ISSN (online) 1872-9177
    ISSN 1769-7255
    DOI 10.1016/j.nephro.2016.02.009
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: The costimulatory receptor B7-1 is not induced in injured podocytes.

    Baye, Emilie / Gallazzini, Morgan / Delville, Marianne / Legendre, Christophe / Terzi, Fabiola / Canaud, Guillaume

    Kidney international

    2016  Volume 90, Issue 5, Page(s) 1037–1044

    Abstract: Recent research on podocytes has proposed B7-1 as an important player in podocyte biology and as a potential new therapeutic target. B7-1 was upregulated in injured podocytes and described as a biomarker to identify patients who may benefit from ... ...

    Abstract Recent research on podocytes has proposed B7-1 as an important player in podocyte biology and as a potential new therapeutic target. B7-1 was upregulated in injured podocytes and described as a biomarker to identify patients who may benefit from abatacept, a B7-1 blocker. However, after this initial enthusiasm, several reports have not confirmed the efficiency of abatacept at inducing proteinuria remission in patients. In order to resolve these discrepancies, we explored the role of B7-1 in the injured podocyte. Both primary cultured and immortalized podocytes were exposed to lipopolysaccharides, but this failed to induce B7-1 expression at the mRNA and protein levels. Importantly, TLR-4 engagement confirmed lipopolysaccharide efficacy. We then evaluated B7-1 expression in several mouse models of podocyte injury including treatment with lipopolysaccharide or Adriamycin, a lupus prone model (NZB/W F1) and subtotal nephrectomy. Using 3 commercially available anti-B7-1 antibodies and appropriate controls, we could not find B7-1 expression in podocytes, whereas some infiltrating cells were positive. Thus, our findings do not support a role for B7-1 in podocyte biology. Hence, further studies are mandatory before treating proteinuric patients with B7-1 blockers.
    MeSH term(s) Animals ; B7-1 Antigen/metabolism ; Glomerulosclerosis, Focal Segmental/metabolism ; Male ; Mice ; Mice, Inbred BALB C ; Mice, Inbred C57BL ; Podocytes/metabolism ; Primary Cell Culture
    Chemical Substances B7-1 Antigen
    Language English
    Publishing date 2016-11
    Publishing country United States
    Document type Journal Article
    ZDB-ID 120573-0
    ISSN 1523-1755 ; 0085-2538
    ISSN (online) 1523-1755
    ISSN 0085-2538
    DOI 10.1016/j.kint.2016.06.022
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: CRISPR/Cas9-Engineered HLA-Deleted Glomerular Endothelial Cells as a Tool to Predict Pathogenic Non-HLA Antibodies in Kidney Transplant Recipients.

    Lamarthée, Baptiste / Burger, Carole / Leclaire, Charlotte / Lebraud, Emilie / Zablocki, Aniela / Morin, Lise / Lebreton, Xavier / Charreau, Béatrice / Snanoudj, Renaud / Charbonnier, Soëli / Blein, Tifanie / Hardy, Mélanie / Zuber, Julien / Satchell, Simon / Gallazzini, Morgan / Terzi, Fabiola / Legendre, Christophe / Taupin, Jean Luc / Rabant, Marion /
    Tinel, Claire / Anglicheau, Dany

    Journal of the American Society of Nephrology : JASN

    2022  Volume 32, Issue 12, Page(s) 3231–3251

    Abstract: Background: After kidney transplantation, donor-specific antibodies against human leukocyte antigen donor-specific antibodies (HLA-DSAs) drive antibody-mediated rejection (ABMR) and are associated with poor transplant outcomes. However, ABMR histology ( ... ...

    Abstract Background: After kidney transplantation, donor-specific antibodies against human leukocyte antigen donor-specific antibodies (HLA-DSAs) drive antibody-mediated rejection (ABMR) and are associated with poor transplant outcomes. However, ABMR histology (ABMRh) is increasingly reported in kidney transplant recipients (KTRs) without HLA-DSAs, highlighting the emerging role of non-HLA antibodies (Abs).
    Methods: W e designed a non-HLA Ab detection immunoassay (NHADIA) using HLA class I and II-deficient glomerular endothelial cells (CiGEnC
    Results: W e sequentially applied CRISPR/Cas9 to delete the
    Conclusion: The NHADIA identifies non-HLA Abs and strongly predicts graft endothelial injury independent of HLA-DSAs.
    MeSH term(s) Adult ; Aged ; CRISPR-Cas Systems/genetics ; Cells, Cultured ; Endothelial Cells/immunology ; Female ; Gene Deletion ; Graft Rejection/etiology ; HLA Antigens/genetics ; HLA Antigens/immunology ; Humans ; Isoantibodies/immunology ; Kidney Glomerulus/immunology ; Kidney Transplantation/adverse effects ; Male ; Middle Aged ; Nuclear Proteins/genetics ; Reoperation ; Retrospective Studies ; Tissue Donors ; Trans-Activators/genetics ; beta 2-Microglobulin/genetics
    Chemical Substances B2M protein, human ; HLA Antigens ; Isoantibodies ; MHC class II transactivator protein ; Nuclear Proteins ; Trans-Activators ; beta 2-Microglobulin
    Language English
    Publishing date 2022-02-11
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 1085942-1
    ISSN 1533-3450 ; 1046-6673
    ISSN (online) 1533-3450
    ISSN 1046-6673
    DOI 10.1681/ASN.2021050689
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Signaling pathways predisposing to chronic kidney disease progression.

    Zaidan, Mohamad / Burtin, Martine / Zhang, Jitao David / Blanc, Thomas / Barre, Pauline / Garbay, Serge / Nguyen, Clément / Vasseur, Florence / Yammine, Lucie / Germano, Serena / Badi, Laura / Gubler, Marie-Claire / Gallazzini, Morgan / Friedlander, Gérard / Pontoglio, Marco / Terzi, Fabiola

    JCI insight

    2020  Volume 5, Issue 9

    Abstract: The loss of functional nephrons after kidney injury triggers the compensatory growth of the remaining ones to allow functional adaptation. However, in some cases, these compensatory events activate signaling pathways that lead to pathological alterations ...

    Abstract The loss of functional nephrons after kidney injury triggers the compensatory growth of the remaining ones to allow functional adaptation. However, in some cases, these compensatory events activate signaling pathways that lead to pathological alterations and chronic kidney disease. Little is known about the identity of these pathways and how they lead to the development of renal lesions. Here, we combined mouse strains that differently react to nephron reduction with molecular and temporal genome-wide transcriptome studies to elucidate the molecular mechanisms involved in these events. We demonstrated that nephron reduction led to 2 waves of cell proliferation: the first one occurred during the compensatory growth regardless of the genetic background, whereas the second one occurred, after a quiescent phase, exclusively in the sensitive strain and accompanied the development of renal lesions. Similarly, clustering by coinertia analysis revealed the existence of 2 waves of gene expression. Interestingly, we identified type I interferon (IFN) response as an early (first-wave) and specific signature of the sensitive (FVB/N) mice. Activation of type I IFN response was associated with G1/S cell cycle arrest, which correlated with p21 nuclear translocation. Remarkably, the transient induction of type I IFN response by poly(I:C) injections during the compensatory growth resulted in renal lesions in otherwise-resistant C57BL6 mice. Collectively, these results suggest that the early molecular and cellular events occurring after nephron reduction determine the risk of developing late renal lesions and point to type I IFN response as a crucial event of the deterioration process.
    MeSH term(s) Animals ; Cell Proliferation ; Disease Progression ; Disease Susceptibility ; Female ; G1 Phase Cell Cycle Checkpoints ; Interferon Type I/metabolism ; Kidney/metabolism ; Kidney/pathology ; Mice ; Mice, Inbred C57BL ; Nephrons/metabolism ; Nephrons/pathology ; Renal Insufficiency, Chronic/metabolism ; Renal Insufficiency, Chronic/pathology ; Signal Transduction
    Chemical Substances Interferon Type I
    Language English
    Publishing date 2020-05-07
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ISSN 2379-3708
    ISSN (online) 2379-3708
    DOI 10.1172/jci.insight.126183
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: GDPD5 is a glycerophosphocholine phosphodiesterase that osmotically regulates the osmoprotective organic osmolyte GPC.

    Gallazzini, Morgan / Ferraris, Joan D / Burg, Maurice B

    Proceedings of the National Academy of Sciences of the United States of America

    2008  Volume 105, Issue 31, Page(s) 11026–11031

    Abstract: Glycerophosphocholine (GPC) is an abundant osmoprotective renal medullary organic osmolyte. We previously found that its synthesis from phosphatidylcholine is catalyzed by tonicity-regulated activity of the phospholipase B, neuropathy target esterase. We ...

    Abstract Glycerophosphocholine (GPC) is an abundant osmoprotective renal medullary organic osmolyte. We previously found that its synthesis from phosphatidylcholine is catalyzed by tonicity-regulated activity of the phospholipase B, neuropathy target esterase. We also found that its degradation is catalyzed by glycerophosphocholine phosphodiesterase (GPC-PDE) activity and that elevating osmolality from 300 to 500 mosmol/kg by adding NaCl or urea, inhibits GPC-PDE activity, which contributes to the resultant increase of GPC. In the present studies we identify GDPD5 (glycerophosphodiester phosphodiesterase domain containing 5) as a GPC-PDE that is rapidly inhibited by high NaCl or urea. Recombinant GDPD5 colocalizes with neuropathy target esterase in the perinuclear region of HEK293 cells, and immuno-precipitated recombinant GDPD5 degrades GPC in vitro. The in vitro activity is reduced when the cells from which the GDPD5 is immuno-precipitated have been exposed to high NaCl or urea. In addition, high NaCl decreases mRNA abundance of GDPD5 via an increase of its degradation rate, although high urea does not. At 300 mosmol/kg siRNA knockdown of GDPD5 increases GPC in mouse inner medullary collecting duct-3 cells, and over expression of recombinant GDPD5 increases cellular GPC-PDE activity, accompanied by decreased GPC. We conclude that GDPD5 is a GPC-PDE that contributes to osmotic regulation of cellular GPC.
    MeSH term(s) Analysis of Variance ; Animals ; Blotting, Western ; Cell Line ; DNA Primers ; Glycerylphosphorylcholine/metabolism ; Humans ; Immunoprecipitation ; Kidney/metabolism ; Mice ; Microscopy, Fluorescence ; Phosphoric Diester Hydrolases/genetics ; Phosphoric Diester Hydrolases/metabolism ; RNA Interference ; RNA, Small Interfering/genetics ; Reverse Transcriptase Polymerase Chain Reaction ; Sodium Chloride/pharmacology ; Urea/pharmacology ; Water-Electrolyte Balance/physiology
    Chemical Substances DNA Primers ; RNA, Small Interfering ; Sodium Chloride (451W47IQ8X) ; Glycerylphosphorylcholine (60M22SGW66) ; Urea (8W8T17847W) ; Phosphoric Diester Hydrolases (EC 3.1.4.-) ; glycerophosphocholine phosphodiesterase (EC 3.1.4.2)
    Language English
    Publishing date 2008-07-30
    Publishing country United States
    Document type Comparative Study ; Journal Article ; Research Support, N.I.H., Intramural
    ZDB-ID 209104-5
    ISSN 1091-6490 ; 0027-8424
    ISSN (online) 1091-6490
    ISSN 0027-8424
    DOI 10.1073/pnas.0805496105
    Database MEDical Literature Analysis and Retrieval System OnLINE

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