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  1. Article ; Online: The Pathophysiological Role of Thymosin β4 in the Kidney Glomerulus.

    Mason, William J / Vasilopoulou, Elisavet

    International journal of molecular sciences

    2023  Volume 24, Issue 9

    Abstract: Diseases affecting the glomerulus, the filtration unit of the kidney, are a major cause of chronic kidney disease. Glomerular disease is characterised by injury of glomerular cells and is often accompanied by an inflammatory response that drives disease ... ...

    Abstract Diseases affecting the glomerulus, the filtration unit of the kidney, are a major cause of chronic kidney disease. Glomerular disease is characterised by injury of glomerular cells and is often accompanied by an inflammatory response that drives disease progression. New strategies are needed to slow the progression to end-stage kidney disease, which requires dialysis or transplantation. Thymosin β4 (Tβ4), an endogenous peptide that sequesters G-actin, has shown potent anti-inflammatory function in experimental models of heart, kidney, liver, lung, and eye injury. In this review, we discuss the role of endogenous and exogenous Tβ4 in glomerular disease progression and the current understanding of the underlying mechanisms.
    MeSH term(s) Humans ; Disease Progression ; Kidney Glomerulus ; Renal Dialysis ; Renal Insufficiency, Chronic ; Thymosin
    Chemical Substances Thymosin (61512-21-8) ; thymosin beta(4) (549LM7U24W) ; TMSB4X protein, human
    Language English
    Publishing date 2023-04-22
    Publishing country Switzerland
    Document type Journal Article ; Review
    ZDB-ID 2019364-6
    ISSN 1422-0067 ; 1422-0067 ; 1661-6596
    ISSN (online) 1422-0067
    ISSN 1422-0067 ; 1661-6596
    DOI 10.3390/ijms24097684
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: The Pathophysiological Role of Thymosin β4 in the Kidney Glomerulus

    William J. Mason / Elisavet Vasilopoulou

    International Journal of Molecular Sciences, Vol 24, Iss 7684, p

    2023  Volume 7684

    Abstract: Diseases affecting the glomerulus, the filtration unit of the kidney, are a major cause of chronic kidney disease. Glomerular disease is characterised by injury of glomerular cells and is often accompanied by an inflammatory response that drives disease ... ...

    Abstract Diseases affecting the glomerulus, the filtration unit of the kidney, are a major cause of chronic kidney disease. Glomerular disease is characterised by injury of glomerular cells and is often accompanied by an inflammatory response that drives disease progression. New strategies are needed to slow the progression to end-stage kidney disease, which requires dialysis or transplantation. Thymosin β4 (Tβ4), an endogenous peptide that sequesters G-actin, has shown potent anti-inflammatory function in experimental models of heart, kidney, liver, lung, and eye injury. In this review, we discuss the role of endogenous and exogenous Tβ4 in glomerular disease progression and the current understanding of the underlying mechanisms.
    Keywords thymosin β4 ; glomerulus ; podocyte ; macrophage ; chronic kidney disease ; Biology (General) ; QH301-705.5 ; Chemistry ; QD1-999
    Language English
    Publishing date 2023-04-01T00:00:00Z
    Publisher MDPI AG
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  3. Article ; Online: Isolating and Culturing Mouse Podocyte Cells to Study Diabetic Nephropathy.

    Vasilopoulou, Elisavet

    Methods in molecular biology (Clifton, N.J.)

    2019  Volume 2067, Page(s) 53–59

    Abstract: Diabetic nephropathy is associated with injury and loss of podocytes, specialized epithelial cells that are critical for glomerular filtration. This chapter describes a method of isolating and culturing podocyte cells from mouse adult kidneys. In this ... ...

    Abstract Diabetic nephropathy is associated with injury and loss of podocytes, specialized epithelial cells that are critical for glomerular filtration. This chapter describes a method of isolating and culturing podocyte cells from mouse adult kidneys. In this way, podocytes with genetic modifications can be obtained from transgenic animals and they can be used to study the effects of the diabetic environment in vitro.
    MeSH term(s) Animals ; Cells, Cultured ; Diabetic Nephropathies/genetics ; Diabetic Nephropathies/pathology ; Disease Models, Animal ; Humans ; Immunomagnetic Separation ; Mice ; Mice, Transgenic ; Podocytes/pathology ; Primary Cell Culture/methods ; Signal Transduction
    Language English
    Publishing date 2019-12-02
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ISSN 1940-6029
    ISSN (online) 1940-6029
    DOI 10.1007/978-1-4939-9841-8_5
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Thymosin-β4: A key modifier of renal disease.

    Vasilopoulou, Elisavet / Riley, Paul R / Long, David A

    Expert opinion on biological therapy

    2018  Volume 18, Issue sup1, Page(s) 185–192

    Abstract: Introduction: There is an urgent need for new treatments for chronic kidney disease (CKD). Thymosin-β4 is a peptide that reduces inflammation and fibrosis and has the potential to restore endothelial and epithelial cell injury, biological processes ... ...

    Abstract Introduction: There is an urgent need for new treatments for chronic kidney disease (CKD). Thymosin-β4 is a peptide that reduces inflammation and fibrosis and has the potential to restore endothelial and epithelial cell injury, biological processes involved in the pathophysiology of CKD. Therefore, thymosin-β4 could be a novel therapeutic direction for CKD.
    Areas covered: Here, we review the current evidence on the actions of thymosin-β4 in the kidney in health and disease. Using transgenic mice, two recent studies have demonstrated that endogenous thymosin-β4 is dispensable for healthy kidneys. In contrast, lack of endogenous thymosin-β4 exacerbates mouse models of glomerular disease and angiotensin-II-induced renal injury. Administration of exogenous thymosin-β4, or its metabolite, Ac-SDKP, has shown therapeutic benefits in a range of experimental models of kidney disease.
    Expert opinion: The studies conducted so far reveal a protective role for thymosin-β4 in the kidney and have shown promising results for the therapeutic potential of exogenous thymosin-β4 in CKD. Further studies should explore the mechanisms by which thymosin-β4 modulates kidney function in different types of CKD. Ac-SDKP treatment has beneficial effects in many experimental models of kidney disease, thus supporting its potential use as a new treatment strategy.
    MeSH term(s) Animals ; Disease Models, Animal ; Fibrosis/pathology ; Fibrosis/prevention & control ; Humans ; Inflammation/drug therapy ; Inflammation/pathology ; Kidney/drug effects ; Kidney/pathology ; Mice ; Mice, Transgenic ; Renal Insufficiency, Chronic/drug therapy ; Renal Insufficiency, Chronic/pathology ; Thymosin/physiology ; Thymosin/therapeutic use
    Chemical Substances thymosin beta(4) (549LM7U24W) ; Thymosin (61512-21-8)
    Language English
    Publishing date 2018-05-09
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Review
    ZDB-ID 2052501-1
    ISSN 1744-7682 ; 1471-2598
    ISSN (online) 1744-7682
    ISSN 1471-2598
    DOI 10.1080/14712598.2018.1473371
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Systemic gene therapy with thymosin β4 alleviates glomerular injury in mice.

    Mason, William J / Jafree, Daniyal J / Pomeranz, Gideon / Kolatsi-Joannou, Maria / Rottner, Antje K / Pacheco, Sabrina / Moulding, Dale A / Wolf, Anja / Kupatt, Christian / Peppiatt-Wildman, Claire / Papakrivopoulou, Eugenia / Riley, Paul R / Long, David A / Vasilopoulou, Elisavet

    Scientific reports

    2022  Volume 12, Issue 1, Page(s) 12172

    Abstract: Plasma ultrafiltration in the kidney occurs across glomerular capillaries, which are surrounded by epithelial cells called podocytes. Podocytes have a unique shape maintained by a complex cytoskeleton, which becomes disrupted in glomerular disease ... ...

    Abstract Plasma ultrafiltration in the kidney occurs across glomerular capillaries, which are surrounded by epithelial cells called podocytes. Podocytes have a unique shape maintained by a complex cytoskeleton, which becomes disrupted in glomerular disease resulting in defective filtration and albuminuria. Lack of endogenous thymosin β4 (TB4), an actin sequestering peptide, exacerbates glomerular injury and disrupts the organisation of the podocyte actin cytoskeleton, however, the potential of exogenous TB4 therapy to improve podocyte injury is unknown. Here, we have used Adriamycin (ADR), a toxin which injures podocytes and damages the glomerular filtration barrier leading to albuminuria in mice. Through interrogating single-cell RNA-sequencing data of isolated glomeruli we demonstrate that ADR injury results in reduced levels of podocyte TB4. Administration of an adeno-associated viral vector encoding TB4 increased the circulating level of TB4 and prevented ADR-induced podocyte loss and albuminuria. ADR injury was associated with disorganisation of the podocyte actin cytoskeleton in vitro, which was ameliorated by treatment with exogenous TB4. Collectively, we propose that systemic gene therapy with TB4 prevents podocyte injury and maintains glomerular filtration via protection of the podocyte cytoskeleton thus presenting a novel treatment strategy for glomerular disease.
    MeSH term(s) Albuminuria ; Animals ; Cells, Cultured ; Doxorubicin ; Genetic Therapy ; Kidney Diseases ; Kidney Glomerulus ; Mice ; Podocytes ; Thymosin
    Chemical Substances thymosin beta(4) (549LM7U24W) ; Thymosin (61512-21-8) ; Doxorubicin (80168379AG)
    Language English
    Publishing date 2022-07-16
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2615211-3
    ISSN 2045-2322 ; 2045-2322
    ISSN (online) 2045-2322
    ISSN 2045-2322
    DOI 10.1038/s41598-022-16287-z
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: The role of thymosin-β4 in kidney disease.

    Vasilopoulou, Elisavet / Winyard, Paul J D / Riley, Paul R / Long, David A

    Expert opinion on biological therapy

    2015  Volume 15 Suppl 1, Page(s) S187–90

    Abstract: Therapies that modulate inflammation and fibrosis have the potential to reduce the morbidity and mortality associated with chronic kidney disease (CKD). A promising avenue may be manipulating thymosin-β4, a naturally occurring peptide, which is the major ...

    Abstract Therapies that modulate inflammation and fibrosis have the potential to reduce the morbidity and mortality associated with chronic kidney disease (CKD). A promising avenue may be manipulating thymosin-β4, a naturally occurring peptide, which is the major G-actin sequestering protein in mammalian cells and a regulator of inflammation and fibrosis. Thymosin-β4 is already being tested in clinical trials for heart disease and wound healing. This editorial outlines the evidence that thymosin-β4 may also have therapeutic benefit in CKD.
    MeSH term(s) Adult ; Animals ; Fibrosis/drug therapy ; Fibrosis/genetics ; Humans ; Inflammation/drug therapy ; Inflammation/genetics ; Kidney/drug effects ; Kidney/pathology ; Mice ; Rats ; Renal Insufficiency, Chronic/drug therapy ; Renal Insufficiency, Chronic/genetics ; Thymosin/physiology ; Thymosin/therapeutic use ; Wound Healing/drug effects ; Wound Healing/genetics
    Chemical Substances thymosin beta(4) (549LM7U24W) ; Thymosin (61512-21-8)
    Language English
    Publishing date 2015
    Publishing country England
    Document type Editorial ; Research Support, Non-U.S. Gov't
    ZDB-ID 2052501-1
    ISSN 1744-7682 ; 1471-2598
    ISSN (online) 1744-7682
    ISSN 1471-2598
    DOI 10.1517/14712598.2015.1009891
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: The role of the placenta in thyroid hormone delivery to the fetus.

    Chan, Shiao Y / Vasilopoulou, Elisavet / Kilby, Mark D

    Nature clinical practice. Endocrinology & metabolism

    2008  Volume 5, Issue 1, Page(s) 45–54

    Abstract: The transplacental passage of thyroid hormones from the maternal circulation to the fetal circulation within the human hemochorial placenta is important for normal fetal development, particularly the development of the central nervous system. The role of ...

    Abstract The transplacental passage of thyroid hormones from the maternal circulation to the fetal circulation within the human hemochorial placenta is important for normal fetal development, particularly the development of the central nervous system. The role of maternal thyroid hormones is particularly important in the first half of pregnancy, before the onset of endogenous thyroid hormone production in the fetus. The human placenta regulates the quantity and composition of different forms of transported thyroid hormones to ensure that the requisite levels are present in the fetus for each stage of development. Transplacental thyroid hormone supply to the fetus is modulated by several factors, including the following proteins: plasma membrane transporters, which regulate the passage of thyroid hormones in and out of cells; iodothyronine deiodinases, which metabolize thyroid hormones; and proteins within trophoblast cells, which bind thyroid hormones. In pathological situations of either maternal or fetal thyroid hormone deficiency during pregnancy, the placenta seems to lack the full compensatory mechanisms necessary to optimize maternal-fetal transfer of thyroid hormones. Inadequate passage of thyroid hormones can lead to suboptimal fetal thyroid hormone levels, which might contribute to the neurodevelopmental delay associated with such conditions. Thus, maintaining normal maternal thyroid hormone status is likely to be the primary factor in ensuring adequate transplacental thyroid hormone passage and appropriate iodide supply to the fetus.
    MeSH term(s) Female ; Fetus/metabolism ; Humans ; Maternal-Fetal Exchange/physiology ; Placenta/metabolism ; Placenta/physiology ; Pregnancy ; Thyroid Hormones/metabolism
    Chemical Substances Thyroid Hormones
    Language English
    Publishing date 2008-12-14
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Review
    ZDB-ID 2228540-4
    ISSN 1745-8374 ; 1745-8366
    ISSN (online) 1745-8374
    ISSN 1745-8366
    DOI 10.1038/ncpendmet1026
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Loss of endogenous thymosin β

    Vasilopoulou, Elisavet / Kolatsi-Joannou, Maria / Lindenmeyer, Maja T / White, Kathryn E / Robson, Michael G / Cohen, Clemens D / Sebire, Neil J / Riley, Paul R / Winyard, Paul J / Long, David A

    Kidney international

    2016  Volume 90, Issue 5, Page(s) 1056–1070

    Abstract: Glomerular disease is characterized by morphologic changes in podocyte cells accompanied by inflammation and fibrosis. Thymosin ... ...

    Abstract Glomerular disease is characterized by morphologic changes in podocyte cells accompanied by inflammation and fibrosis. Thymosin β
    MeSH term(s) Animals ; Cell Movement ; Cells, Cultured ; Cytoskeleton/metabolism ; Fibrosis ; Glomerulonephritis/metabolism ; Glomerulonephritis/pathology ; Kidney Glomerulus/pathology ; Macrophages ; Male ; Mice, Inbred C57BL ; Mice, Knockout ; Podocytes/metabolism ; Thymosin/metabolism
    Chemical Substances thymosin beta(4) (549LM7U24W) ; Thymosin (61512-21-8)
    Language English
    Publishing date 2016-08-26
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 120573-0
    ISSN 1523-1755 ; 0085-2538
    ISSN (online) 1523-1755
    ISSN 0085-2538
    DOI 10.1016/j.kint.2016.06.032
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Vangl2, a planar cell polarity molecule, is implicated in irreversible and reversible kidney glomerular injury.

    Papakrivopoulou, Eugenia / Vasilopoulou, Elisavet / Lindenmeyer, Maja T / Pacheco, Sabrina / Brzóska, Hortensja Ł / Price, Karen L / Kolatsi-Joannou, Maria / White, Kathryn E / Henderson, Deborah J / Dean, Charlotte H / Cohen, Clemens D / Salama, Alan D / Woolf, Adrian S / Long, David A

    The Journal of pathology

    2018  Volume 246, Issue 4, Page(s) 485–496

    Abstract: Planar cell polarity (PCP) pathways control the orientation and alignment of epithelial cells within tissues. Van Gogh-like 2 (Vangl2) is a key PCP protein that is required for the normal differentiation of kidney glomeruli and tubules. Vangl2 has also ... ...

    Abstract Planar cell polarity (PCP) pathways control the orientation and alignment of epithelial cells within tissues. Van Gogh-like 2 (Vangl2) is a key PCP protein that is required for the normal differentiation of kidney glomeruli and tubules. Vangl2 has also been implicated in modifying the course of acquired glomerular disease, and here, we further explored how Vangl2 impacts on glomerular pathobiology in this context. Targeted genetic deletion of Vangl2 in mouse glomerular epithelial podocytes enhanced the severity of not only irreversible accelerated nephrotoxic nephritis but also lipopolysaccharide-induced reversible glomerular damage. In each proteinuric model, genetic deletion of Vangl2 in podocytes was associated with an increased ratio of active-MMP9 to inactive MMP9, an enzyme involved in tissue remodelling. In addition, by interrogating microarray data from two cohorts of renal patients, we report increased VANGL2 transcript levels in the glomeruli of individuals with focal segmental glomerulosclerosis, suggesting that the molecule may also be involved in certain human glomerular diseases. These observations support the conclusion that Vangl2 modulates glomerular injury, at least in part by acting as a brake on MMP9, a potentially harmful endogenous enzyme. © 2018 The Authors. The Journal of Pathology published by John Wiley & Sons Ltd on behalf of Pathological Society of Great Britain and Ireland.
    MeSH term(s) Adult ; Animals ; Case-Control Studies ; Cell Polarity ; Cells, Cultured ; Disease Models, Animal ; Enzyme Activation ; Female ; Glomerulosclerosis, Focal Segmental/genetics ; Glomerulosclerosis, Focal Segmental/metabolism ; Glomerulosclerosis, Focal Segmental/pathology ; Glomerulosclerosis, Focal Segmental/physiopathology ; Humans ; Intracellular Signaling Peptides and Proteins/genetics ; Intracellular Signaling Peptides and Proteins/metabolism ; Kidney Glomerulus/metabolism ; Kidney Glomerulus/pathology ; Kidney Glomerulus/physiopathology ; Male ; Matrix Metalloproteinase 9/metabolism ; Membrane Proteins/genetics ; Membrane Proteins/metabolism ; Mice, Inbred C57BL ; Mice, Knockout ; Middle Aged ; Nephrosis, Lipoid/genetics ; Nephrosis, Lipoid/metabolism ; Nephrosis, Lipoid/pathology ; Nephrosis, Lipoid/physiopathology ; Nerve Tissue Proteins/deficiency ; Nerve Tissue Proteins/genetics ; Nerve Tissue Proteins/metabolism ; Podocytes/metabolism ; Podocytes/pathology ; Signal Transduction ; Young Adult
    Chemical Substances Intracellular Signaling Peptides and Proteins ; Ltap protein, mouse ; Membrane Proteins ; Nerve Tissue Proteins ; VANGL2 protein, human ; Matrix Metalloproteinase 9 (EC 3.4.24.35) ; Mmp9 protein, mouse (EC 3.4.24.35)
    Language English
    Publishing date 2018-08-17
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 3119-7
    ISSN 1096-9896 ; 0022-3417
    ISSN (online) 1096-9896
    ISSN 0022-3417
    DOI 10.1002/path.5158
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: Monocarboxylate transporter 8 modulates the viability and invasive capacity of human placental cells and fetoplacental growth in mice.

    Vasilopoulou, Elisavet / Loubière, Laurence S / Heuer, Heike / Trajkovic-Arsic, Marija / Darras, Veerle M / Visser, Theo J / Lash, Gendie E / Whitley, Guy S / McCabe, Christopher J / Franklyn, Jayne A / Kilby, Mark D / Chan, Shiao Y

    PloS one

    2013  Volume 8, Issue 6, Page(s) e65402

    Abstract: Monocarboxylate transporter 8 (MCT8) is a well-established thyroid hormone (TH) transporter. In humans, MCT8 mutations result in changes in circulating TH concentrations and X-linked severe global neurodevelopmental delay. MCT8 is expressed in the human ... ...

    Abstract Monocarboxylate transporter 8 (MCT8) is a well-established thyroid hormone (TH) transporter. In humans, MCT8 mutations result in changes in circulating TH concentrations and X-linked severe global neurodevelopmental delay. MCT8 is expressed in the human placenta throughout gestation, with increased expression in trophoblast cells from growth-restricted pregnancies. We postulate that MCT8 plays an important role in placental development and transplacental TH transport. We investigated the effect of altering MCT8 expression in human trophoblast in vitro and in a Mct8 knockout mouse model. Silencing of endogenous MCT8 reduced T3 uptake into human extravillous trophoblast-like cells (SGHPL-4; 40%, P<0.05) and primary cytotrophoblast (15%, P<0.05). MCT8 over-expression transiently increased T3 uptake (SGHPL-4∶30%, P<0.05; cytotrophoblast: 15%, P<0.05). Silencing MCT8 did not significantly affect SGHPL-4 invasion, but with MCT8 over-expression T3 treatment promoted invasion compared with no T3 (3.3-fold; P<0.05). Furthermore, MCT8 silencing increased cytotrophoblast viability (∼20%, P<0.05) and MCT8 over-expression reduced cytotrophoblast viability independently of T3 (∼20%, P<0.05). In vivo, Mct8 knockout reduced fetal:placental weight ratios compared with wild-type controls at gestational day 18 (25%, P<0.05) but absolute fetal and placental weights were not significantly different. The volume fraction of the labyrinthine zone of the placenta, which facilitates maternal-fetal exchange, was reduced in Mct8 knockout placentae (10%, P<0.05). However, there was no effect on mouse placental cell proliferation in vivo. We conclude that MCT8 makes a significant contribution to T3 uptake into human trophoblast cells and has a role in modulating human trophoblast cell invasion and viability. In mice, Mct8 knockout has subtle effects upon fetoplacental growth and does not significantly affect placental cell viability probably due to compensatory mechanisms in vivo.
    MeSH term(s) Analysis of Variance ; Animals ; Apoptosis/physiology ; Cell Movement/physiology ; Cell Proliferation ; Cells, Cultured ; England ; Female ; Humans ; Membrane Transport Proteins/genetics ; Mice ; Mice, Knockout ; Monocarboxylic Acid Transporters/metabolism ; Organ Size ; Placenta/cytology ; Placenta/metabolism ; Placentation ; Pregnancy ; RNA, Small Interfering/genetics ; Symporters ; Thyroid Hormones/metabolism ; Trophoblasts/metabolism
    Chemical Substances Membrane Transport Proteins ; Monocarboxylic Acid Transporters ; RNA, Small Interfering ; SLC16A2 protein, human ; Slc16a2 protein, mouse ; Symporters ; Thyroid Hormones
    Language English
    Publishing date 2013-06-12
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ISSN 1932-6203
    ISSN (online) 1932-6203
    DOI 10.1371/journal.pone.0065402
    Database MEDical Literature Analysis and Retrieval System OnLINE

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