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  1. Article ; Online: War in Ukraine.

    Cybulsky, Andrey V

    Kidney international

    2022  Volume 102, Issue 3, Page(s) 669

    MeSH term(s) Ukraine/epidemiology
    Language English
    Publishing date 2022-08-18
    Publishing country United States
    Document type Letter
    ZDB-ID 120573-0
    ISSN 1523-1755 ; 0085-2538
    ISSN (online) 1523-1755
    ISSN 0085-2538
    DOI 10.1016/j.kint.2022.06.014
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article: Transition From Pediatric to Adult Nephrology Care: Program Report of a Single-Center Experience.

    Cybulsky, Andrey V / Cercena, Leonor / Goodyer, Paul R / Suri, Rita S

    Canadian journal of kidney health and disease

    2023  Volume 10, Page(s) 20543581231191836

    Abstract: Purpose of program: Adolescents and young adults with chronic disease face many personal and systemic barriers that may impede their successful transition from pediatric to adult care, putting them at risk for treatment nonadherence, loss to follow-up, ... ...

    Abstract Purpose of program: Adolescents and young adults with chronic disease face many personal and systemic barriers that may impede their successful transition from pediatric to adult care, putting them at risk for treatment nonadherence, loss to follow-up, and poor health outcomes. Such barriers include impaired socioemotional functioning, overreliance on adult caregivers, lack of disease-specific knowledge, and poor coordination between pediatric and adult health care services. In 2007, we established a specialized youth to adult nephrology transition clinic at a tertiary care center to address these barriers and provide adolescents and young adults with renal disease followed at the affiliated children's hospital with a seamless transition to adult care.
    Sources of information: The attending clinic nephrologist collected data prospectively for this quality improvement report.
    Methods: The features of this specialized clinic included (1) single point of entry and single triage adult nephrologist, (2) ongoing follow-up with a single adult nephrologist who communicated with the pediatric nephrologists, and (3) a single specialized clinic nurse who provided disease-specific education and helped to ensure ongoing patient engagement and follow-up. Importantly, the transition patients were booked into regular appointment slots in the adult nephrologist's general clinic, which facilitated regular follow-up without additional resources. The salary of the transition clinic nurse was covered by an unrestricted grant. Patient visits were in-person, except between 2020 and 2021 when visits were by telephone due to the pandemic.
    Key findings: A total of 213 patients were referred and assessed in the transition clinic from February 2007 until October 2022. Most referrals were from pediatric nephrologists. Among the patients, 29% had a hereditary kidney disease; in 71%, the disease was acquired. The most common disease was glomerulonephritis and ~30% of the patients suffered from a "rare" disease. Of the 213 patients, 123 (58%) continue to be followed up (mean follow-up: 4.8 years), 27 (13%) were transferred to other physicians, in part to accommodate treatment closer to patients' homes, and 29 (14%) without ongoing care needs were discharged. Only 33 (15%) were lost to follow-up. There were several advantages to the clinic, including the maintenance of accurate records, a process to minimize loss to follow-up, and a "critical mass" of patients with rare diseases, which facilitated development of special expertise in rare disease pathogenesis, diagnosis, treatment, and management of complications. Patients with glomerulonephritis demonstrated a stable serum creatinine over 3 to 15 years, and morbidity (as reflected by emergency room visits and hospitalizations) was low.
    Limitations: Due to the relatively small numbers of patients in the disease categories, it was not possible to determine conclusively whether attendance of patients in the transition clinic reduced the rate of progression of kidney disease or morbidity.
    Implications: A dedicated referral, triage, and follow-up process post-transition with only modest financial resources and personnel can result in accurate tracking of clinic data, as well as consistent and reliable follow-up and expert patient care.
    Language English
    Publishing date 2023-08-08
    Publishing country England
    Document type Journal Article
    ZDB-ID 2765462-X
    ISSN 2054-3581
    ISSN 2054-3581
    DOI 10.1177/20543581231191836
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Endoplasmic reticulum stress, the unfolded protein response and autophagy in kidney diseases.

    Cybulsky, Andrey V

    Nature reviews. Nephrology

    2017  Volume 13, Issue 11, Page(s) 681–696

    Abstract: Progress has been made in our understanding of the mechanisms of endoplasmic reticulum (ER) proteostasis, ER stress and the unfolded protein response (UPR), as well as ER stress-induced autophagy, in the kidney. Experimental models have revealed that ... ...

    Abstract Progress has been made in our understanding of the mechanisms of endoplasmic reticulum (ER) proteostasis, ER stress and the unfolded protein response (UPR), as well as ER stress-induced autophagy, in the kidney. Experimental models have revealed that disruption of the UPR, including a protein that senses misfolded proteins (namely, inositol-requiring enzyme 1α) in mouse podocytes causes podocyte injury and albuminuria as mice age. Protein misfolding and ER stress are evident in various renal diseases, including primary glomerulonephritides, glomerulopathies associated with genetic mutations, diabetic nephropathy, acute kidney injury, chronic kidney disease and renal fibrosis. The induction of ER stress may be cytoprotective, or it may be cytotoxic by activating apoptosis. The UPR may interact in a coordinated manner with autophagy to alleviate protein misfolding and its consequences. Monitoring the excretion of ER chaperones into the urine can potentially serve as a biomarker of renal ER stress. In specific kidney diseases, the treatment of experimental animals with chemical chaperones that improve protein folding or with chaperone inducers has alleviated kidney injury. Given the limited availability of mechanism-based therapies for kidney diseases, normalization of ER stress using pharmacological agents represents a promising therapeutic approach towards preventing or arresting the progression of kidney disease.
    MeSH term(s) Animals ; Apoptosis ; Autophagy/physiology ; Endoplasmic Reticulum/metabolism ; Endoplasmic Reticulum Stress ; Humans ; Kidney Diseases/metabolism ; Kidney Diseases/pathology ; Models, Biological ; Unfolded Protein Response
    Language English
    Publishing date 2017-11
    Publishing country England
    Document type Journal Article ; Review
    ZDB-ID 2490366-8
    ISSN 1759-507X ; 1759-5061
    ISSN (online) 1759-507X
    ISSN 1759-5061
    DOI 10.1038/nrneph.2017.129
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Role of the Ste20-like kinase SLK in podocyte adhesion.

    Cybulsky, Andrey V / Papillon, Joan / Bryan, Craig / Navarro-Betancourt, José R / Sabourin, Luc A

    Physiological reports

    2023  Volume 12, Issue 1, Page(s) e15897

    Abstract: SLK controls the cytoskeleton, cell adhesion, and migration. Podocyte-specific deletion of SLK in mice leads to podocyte injury as mice age and exacerbates injury in experimental focal segment glomerulosclerosis (FSGS; adriamycin nephrosis). We ... ...

    Abstract SLK controls the cytoskeleton, cell adhesion, and migration. Podocyte-specific deletion of SLK in mice leads to podocyte injury as mice age and exacerbates injury in experimental focal segment glomerulosclerosis (FSGS; adriamycin nephrosis). We hypothesized that adhesion proteins may be substrates of SLK. In adriamycin nephrosis, podocyte ultrastructural injury was exaggerated by SLK deletion. Analysis of a protein kinase phosphorylation site dataset showed that podocyte adhesion proteins-paxillin, vinculin, and talin-1 may be potential SLK substrates. In cultured podocytes, deletion of SLK increased adhesion to collagen. Analysis of paxillin, vinculin, and talin-1 showed that SLK deletion reduced focal adhesion complexes (FACs) containing these proteins mainly in adriamycin-induced injury; there was no change in FAC turnover (focal adhesion kinase Y397 phosphorylation). In podocytes, paxillin S250 showed basal phosphorylation that was slightly enhanced by SLK; however, SLK did not phosphorylate talin-1. In adriamycin nephrosis, SLK deletion did not alter glomerular expression/localization of talin-1 and vinculin, but increased focal adhesion kinase phosphorylation modestly. Therefore, SLK decreases podocyte adhesion, but FAC proteins in podocytes are not major substrates of SLK in health and disease.
    MeSH term(s) Mice ; Animals ; Podocytes/metabolism ; Paxillin/metabolism ; Vinculin/metabolism ; Talin/genetics ; Talin/metabolism ; Nephrosis ; Focal Adhesion Protein-Tyrosine Kinases/metabolism ; Doxorubicin/toxicity ; Protein Serine-Threonine Kinases/metabolism
    Chemical Substances Paxillin ; Vinculin (125361-02-6) ; Talin ; Focal Adhesion Protein-Tyrosine Kinases (EC 2.7.10.2) ; Doxorubicin (80168379AG) ; SLK protein, mouse (EC 2.7.11.1) ; Protein Serine-Threonine Kinases (EC 2.7.11.1)
    Language English
    Publishing date 2023-12-30
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2724325-4
    ISSN 2051-817X ; 2051-817X
    ISSN (online) 2051-817X
    ISSN 2051-817X
    DOI 10.14814/phy2.15897
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: The intersecting roles of endoplasmic reticulum stress, ubiquitin- proteasome system, and autophagy in the pathogenesis of proteinuric kidney disease.

    Cybulsky, Andrey V

    Kidney international

    2013  Volume 84, Issue 1, Page(s) 25–33

    Abstract: Protein misfolding in the endoplasmic reticulum (ER) leads to ER stress. The unfolded protein response and ER-associated degradation (ERAD) interact in a coordinated manner with the ubiquitin-proteasome system and autophagy to alleviate protein ... ...

    Abstract Protein misfolding in the endoplasmic reticulum (ER) leads to ER stress. The unfolded protein response and ER-associated degradation (ERAD) interact in a coordinated manner with the ubiquitin-proteasome system and autophagy to alleviate protein misfolding or its consequences. The intersecting actions of these processes are evident in normal podocyte physiology, and in proteinuric glomerular diseases, including experimental membranous nephropathy, focal segmental sclerosis, and diabetic nephropathy. There is some evidence for the induction of ER stress, changes in the ubiquitin-proteasome system, and presence of autophagy in human glomerulopathies. Various therapeutic approaches to the unfolded protein response, ERAD, and the ubiquitin-proteasome system have corrected experimental glomerular diseases involving protein misfolding, and could potentially be developed as therapies in humans.
    MeSH term(s) Animals ; Autophagy ; Endoplasmic Reticulum/enzymology ; Endoplasmic Reticulum/pathology ; Endoplasmic Reticulum Stress ; Humans ; Kidney/enzymology ; Kidney/pathology ; Kidney/physiopathology ; Kidney Diseases/enzymology ; Kidney Diseases/pathology ; Kidney Diseases/physiopathology ; Kidney Diseases/therapy ; Proteasome Endopeptidase Complex/metabolism ; Proteinuria/enzymology ; Proteinuria/pathology ; Proteinuria/physiopathology ; Proteinuria/therapy ; Signal Transduction ; Ubiquitin/metabolism ; Unfolded Protein Response
    Chemical Substances Ubiquitin ; Proteasome Endopeptidase Complex (EC 3.4.25.1)
    Language English
    Publishing date 2013-07
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Review
    ZDB-ID 120573-0
    ISSN 1523-1755 ; 0085-2538
    ISSN (online) 1523-1755
    ISSN 0085-2538
    DOI 10.1038/ki.2012.390
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  6. Article: Analysis of gene expression and use of connectivity mapping to identify drugs for treatment of human glomerulopathies.

    Chung, Chen-Fang / Papillon, Joan / Navarro-Betancourt, José R / Guillemette, Julie / Bhope, Ameya / Emad, Amin / Cybulsky, Andrey V

    Frontiers in medicine

    2023  Volume 10, Page(s) 1122328

    Abstract: Background: Human glomerulonephritis (GN)-membranous nephropathy (MN), focal segmental glomerulosclerosis (FSGS) and IgA nephropathy (IgAN), as well as diabetic nephropathy (DN) are leading causes of chronic kidney disease. In these glomerulopathies, ... ...

    Abstract Background: Human glomerulonephritis (GN)-membranous nephropathy (MN), focal segmental glomerulosclerosis (FSGS) and IgA nephropathy (IgAN), as well as diabetic nephropathy (DN) are leading causes of chronic kidney disease. In these glomerulopathies, distinct stimuli disrupt metabolic pathways in glomerular cells. Other pathways, including the endoplasmic reticulum (ER) unfolded protein response (UPR) and autophagy, are activated in parallel to attenuate cell injury or promote repair.
    Methods: We used publicly available datasets to examine gene transcriptional pathways in glomeruli of human GN and DN and to identify drugs.
    Results: We demonstrate that there are many common genes upregulated in MN, FSGS, IgAN, and DN. Furthermore, these glomerulopathies were associated with increased expression of ER/UPR and autophagy genes, a significant number of which were shared. Several candidate drugs for treatment of glomerulopathies were identified by relating gene expression signatures of distinct drugs in cell culture with the ER/UPR and autophagy genes upregulated in the glomerulopathies ("connectivity mapping"). Using a glomerular cell culture assay that correlates with glomerular damage
    Conclusion: The UPR and autophagy are activated in multiple types of glomerular injury. Connectivity mapping identified candidate drugs that shared common signatures with ER/UPR and autophagy genes upregulated in glomerulopathies, and one of these drugs attenuated injury of glomerular cells. The present study opens the possibility for modulating the UPR or autophagy pharmacologically as therapy for GN.
    Language English
    Publishing date 2023-03-13
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2775999-4
    ISSN 2296-858X
    ISSN 2296-858X
    DOI 10.3389/fmed.2023.1122328
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  7. Article ; Online: Regulation of Autophagy Progress via Lysosomal Depletion by Fluvastatin Nanoparticle Treatment in Breast Cancer Cells.

    Elimam, Hanan / El-Say, Khalid M / Cybulsky, Andrey V / Khalil, Hany

    ACS omega

    2020  Volume 5, Issue 25, Page(s) 15476–15486

    Abstract: Fluvastatin (FLV) is a statin family member that may play a role in modulating a variety of medical disorders such as atherosclerosis and breast cancer. The present study addresses the ability of FLV to modulate the cellular immune response and provides ... ...

    Abstract Fluvastatin (FLV) is a statin family member that may play a role in modulating a variety of medical disorders such as atherosclerosis and breast cancer. The present study addresses the ability of FLV to modulate the cellular immune response and provides a new nanosized FLV formula (self-nanoemulsifying delivery system, SNED) potentially more effective for suppression of breast cancer development. We monitored autophagic machinery through the expression of microtubule-associated protein 1A/1B-light chain 3 (LC3I/II). Lysosomal activity upon treatment was evaluated by mRNA and protein expression of lysosomal-associated membrane protein 1 (LAMP-1). Mitogen-activated protein kinase (MAPK) signaling and its association with proinflammatory cytokine secretion were assessed in treated cells. Autophagosome formation was significantly increased in cells that were pretreated with FLV-SNED in comparison to FLV-treated cells. Activation of autophagy was accompanied with arrest of LAMP-1 expression, which correlates with lysosomal activity. Simultaneously, both FLV and FLV-SNED activated MAPK signaling and modified interleukin-6 and tumor necrosis factor-α levels in treated cells. These findings indicate that FLV reduces cell viability via depletion of lysosomal activities along with accumulation of autophagosomes leading to disturbance of autophagosome-lysosomal fusion in treated cells. Furthermore, our data reveal the effectiveness of both FLV agents in the modulation of proinflammatory cytokine secretion from treated cells via regulation of MAPK signaling cascades and indicate that FLV-SNED is more efficient than FLV. This study provides new insights into how FLV regulates breast cancer cell viability via modulation of AMPK-mTOR and ERK-mTOR signaling, and through autophagosome formation accompanied by lysosomal degradation.
    Language English
    Publishing date 2020-06-22
    Publishing country United States
    Document type Journal Article
    ISSN 2470-1343
    ISSN (online) 2470-1343
    DOI 10.1021/acsomega.0c01618
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  8. Article ; Online: Membranous nephropathy.

    Cybulsky, Andrey V

    Contributions to nephrology

    2011  Volume 169, Page(s) 107–125

    Abstract: The understanding of cellular and molecular mechanisms involved in the pathogenesis of membranous nephropathy (MN) has come from studies carried out in the Heymann nephritis model of MN in the rat, which closely resembles the clinical and pathologic ... ...

    Abstract The understanding of cellular and molecular mechanisms involved in the pathogenesis of membranous nephropathy (MN) has come from studies carried out in the Heymann nephritis model of MN in the rat, which closely resembles the clinical and pathologic features of the human disease. MN involves the in situ formation of subepithelial immune deposits as a result of circulating antibodies binding to podocyte antigens. Complement activation leads to assembly of C5b-9 on podocyte plasma membranes, and results in sublethal podocyte injury and proteinuria. The podocyte responds to sublethal C5b-9 attack by activating protein kinases, phospholipases, cyclooxygenases, transcription factors, growth factors, NADPH oxidase, stress pathways, proteinases, etc. These signals impact on cell metabolic pathways, the structure/function of lipids and key proteins in the cytoskeleton and slit diaphragm, and on the turnover of extracellular matrix components. Some effects of C5b-9, including dissolution of the actin cytoskeleton, loss of nephrin expression, reduction in F-actin-bound nephrin and loss of slit diaphragm integrity, affect podocytes adversely. Other effects of complement, such as endoplasmic reticulum stress, may limit injury or promote recovery. A number of studies have confirmed the relevance of several experimental insights to the pathogenesis of human MN, including the presence of autoantibodies directed to podocyte antigens in human MN. Increased understanding of nephritogenic antigens, complement activation, and the cellular signaling pathways and targets of C5b-9 will facilitate the design of new approaches to therapy of this important glomerular disease.
    MeSH term(s) Animals ; Autoantibodies/metabolism ; Complement Activation/physiology ; Complement Membrane Attack Complex/physiology ; Disease Models, Animal ; Glomerulonephritis, Membranous/immunology ; Glomerulonephritis, Membranous/pathology ; Glomerulonephritis, Membranous/physiopathology ; Humans ; Podocytes/immunology ; Podocytes/pathology ; Podocytes/physiology ; Rats ; Signal Transduction/physiology
    Chemical Substances Autoantibodies ; Complement Membrane Attack Complex
    Language English
    Publishing date 2011-01-20
    Publishing country Switzerland
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Review
    ISSN 1662-2782 ; 0302-5144
    ISSN (online) 1662-2782
    ISSN 0302-5144
    DOI 10.1159/000313948
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  9. Article ; Online: Urinary ERdj3 and mesencephalic astrocyte-derived neutrophic factor identify endoplasmic reticulum stress in glomerular disease.

    Tousson-Abouelazm, Nihad / Papillon, Joan / Guillemette, Julie / Cybulsky, Andrey V

    Laboratory investigation; a journal of technical methods and pathology

    2020  Volume 100, Issue 7, Page(s) 945–958

    Abstract: Podocyte injury and endoplasmic reticulum (ER) stress have been implicated in the pathogenesis of various glomerular diseases. ERdj3 (DNAJB11) and mesencephalic astrocyte-derived neurotrophic factor (MANF) are ER chaperones lacking the KDEL motif, and ... ...

    Abstract Podocyte injury and endoplasmic reticulum (ER) stress have been implicated in the pathogenesis of various glomerular diseases. ERdj3 (DNAJB11) and mesencephalic astrocyte-derived neurotrophic factor (MANF) are ER chaperones lacking the KDEL motif, and may be secreted extracellularly. Since podocytes reside in the urinary space, we examined if podocyte injury is associated with secretion of KDEL-free ER chaperones from these cells into the urine, and if chaperones in the urine reflect ER stress in glomerulonephritis. In cultured podocytes, ER stress increased ERdj3 and MANF intracellularly and in culture medium, whereas GRP94 (KDEL chaperone) increased only intracellularly. ERdj3 and MANF secretion was blocked by the secretory trafficking inhibitor, brefeldin A. Urinary ERdj3 and MANF increased in rats injected with tunicamycin (in the absence of proteinuria). After induction of passive Heymann nephritis (PHN) and puromycin aminonucleoside nephrosis (PAN), there was an increase in glomerular ER stress, and appearance of ERdj3 and MANF in the urine, coinciding with the onset of proteinuria. Rats with PHN were treated with the chemical chaperone, 4-phenyl butyrate (PBA), starting at the time of disease induction, or after disease was established. In both protocols, 4-PBA reduced proteinuria and urinary ER chaperone secretion, compared with PHN rats treated with saline (control). In conclusion, urinary ERdj3 and MANF reflect glomerular ER stress. 4-PBA protected against complement-mediated podocyte injury and the therapeutic response could be monitored by urinary ERdj3 and MANF.
    MeSH term(s) Animals ; Cells, Cultured ; Endoplasmic Reticulum Stress/physiology ; Glomerulonephritis/metabolism ; Glomerulonephritis/physiopathology ; Glomerulonephritis/urine ; HSP40 Heat-Shock Proteins/metabolism ; HSP40 Heat-Shock Proteins/urine ; Kidney Glomerulus/cytology ; Kidney Glomerulus/drug effects ; Male ; Mice ; Nerve Growth Factors/metabolism ; Nerve Growth Factors/urine ; Rats ; Rats, Sprague-Dawley ; Tunicamycin/pharmacology
    Chemical Substances HSP40 Heat-Shock Proteins ; Nerve Growth Factors ; Tunicamycin (11089-65-9)
    Language English
    Publishing date 2020-03-18
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 80178-1
    ISSN 1530-0307 ; 0023-6837
    ISSN (online) 1530-0307
    ISSN 0023-6837
    DOI 10.1038/s41374-020-0416-5
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: Drinking away fatigue in multiple sclerosis.

    Trojan, Daria A / Cybulsky, Andrey V

    Multiple sclerosis (Houndmills, Basingstoke, England)

    2016  Volume 22, Issue 11, Page(s) 1382–1384

    Language English
    Publishing date 2016-10
    Publishing country England
    Document type Editorial
    ZDB-ID 1290669-4
    ISSN 1477-0970 ; 1352-4585
    ISSN (online) 1477-0970
    ISSN 1352-4585
    DOI 10.1177/1352458516666337
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