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  1. Article ; Online: NETosis Drives Blood Pressure Elevation and Vascular Dysfunction in Hypertension.

    Krishnan, Jaya / Hennen, Elizabeth M / Ao, Mingfang / Kirabo, Annet / Ahmad, Taseer / de la Visitación, Néstor / Patrick, David M

    Circulation research

    2024  

    Abstract: Background: Neutrophil extracellular traps (NETs) are composed of nDNA, enzymes, and citrullinated histones that are expelled by neutrophils in the process of NETosis. NETs accumulate in the aorta and kidneys in hypertension. PAD4 (protein-arginine ... ...

    Abstract Background: Neutrophil extracellular traps (NETs) are composed of nDNA, enzymes, and citrullinated histones that are expelled by neutrophils in the process of NETosis. NETs accumulate in the aorta and kidneys in hypertension. PAD4 (protein-arginine deiminase-4) is a calcium-dependent enzyme that is essential for NETosis. TRPV4 (transient receptor potential cation channel subfamily V member 4) is a mechanosensitive calcium channel expressed in neutrophils. Thus, we hypothesize that NETosis contributes to hypertension via NET-mediated endothelial cell (EC) dysfunction.
    Methods: NETosis-deficient
    Results: Padi4
    Conclusions: These observations identify a role of NETosis in the pathogenesis of hypertension. Moreover, they define an important role of EC stretch and TRPV4 as initiators of NETosis. Finally, they define a role of citrullinated histones as drivers of EC dysfunction in hypertension.
    Language English
    Publishing date 2024-04-26
    Publishing country United States
    Document type Journal Article
    ZDB-ID 80100-8
    ISSN 1524-4571 ; 0009-7330 ; 0931-6876
    ISSN (online) 1524-4571
    ISSN 0009-7330 ; 0931-6876
    DOI 10.1161/CIRCRESAHA.123.323897
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Immunoproteasomal Processing of IsoLG-Adducted Proteins Is Essential for Hypertension.

    de la Visitación, Néstor / Chen, Wei / Krishnan, Jaya / Van Beusecum, Justin P / Amarnath, Venkataraman / Hennen, Elizabeth M / Zhao, Shilin / Saleem, Mohammad / Ao, Mingfang / Dikalov, Sergey I / Dikalova, Anna E / Harrison, David G / Patrick, David M

    Circulation research

    2024  Volume 134, Issue 10, Page(s) 1276–1291

    Abstract: Background: Hypertension is characterized by CD8: Methods: IsoLG adduct processing was studied in murine dendritic cells (DCs), endothelial cells (ECs), and B8 fibroblasts. The role of the proteasome and the immunoproteasome in Ang II (angiotensin II) ...

    Abstract Background: Hypertension is characterized by CD8
    Methods: IsoLG adduct processing was studied in murine dendritic cells (DCs), endothelial cells (ECs), and B8 fibroblasts. The role of the proteasome and the immunoproteasome in Ang II (angiotensin II)-induced hypertension was studied in
    Results: We found that oxidant stress increases the presence of isoLG adducts within MHC-I (class I major histocompatibility complex), and immunoproteasome overexpression augments this. Pharmacological or genetic inhibition of the immunoproteasome attenuated hypertension and tissue inflammation. Conditional deletion of LMP7 in either DCs or ECs attenuated hypertension and vascular inflammation. Finally, we defined the role of the innate immune receptors STING (stimulator of interferon genes) and TLR7/8 (toll-like receptor 7/8) as drivers of LMP7 expression in ECs.
    Conclusions: These studies define a previously unknown role of the immunoproteasome in DCs and ECs in CD8
    MeSH term(s) Animals ; Proteasome Endopeptidase Complex/metabolism ; Hypertension/metabolism ; Hypertension/immunology ; Mice, Inbred C57BL ; Dendritic Cells/immunology ; Dendritic Cells/metabolism ; Mice ; Mice, Knockout ; CD8-Positive T-Lymphocytes/immunology ; Bortezomib/pharmacology ; Angiotensin II ; Male ; Oxidative Stress ; Proteasome Inhibitors/pharmacology ; Histocompatibility Antigens Class I/metabolism ; Histocompatibility Antigens Class I/genetics ; Lymphocyte Activation ; Cells, Cultured ; Fibroblasts/metabolism ; Endothelial Cells/metabolism ; Endothelial Cells/immunology ; Oligopeptides
    Chemical Substances Proteasome Endopeptidase Complex (EC 3.4.25.1) ; Bortezomib (69G8BD63PP) ; LMP7 protein (EC 3.4.25.1) ; Angiotensin II (11128-99-7) ; PR-957 ; Proteasome Inhibitors ; Histocompatibility Antigens Class I ; Oligopeptides
    Language English
    Publishing date 2024-04-16
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't
    ZDB-ID 80100-8
    ISSN 1524-4571 ; 0009-7330 ; 0931-6876
    ISSN (online) 1524-4571
    ISSN 0009-7330 ; 0931-6876
    DOI 10.1161/CIRCRESAHA.124.324068
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: IsoLGs (Isolevuglandins) Drive Neutrophil Migration in Hypertension and Are Essential for the Formation of Neutrophil Extracellular Traps.

    Krishnan, Jaya / de la Visitación, Néstor / Hennen, Elizabeth M / Amarnath, Venkataraman / Harrison, David G / Patrick, David M

    Hypertension (Dallas, Tex. : 1979)

    2022  Volume 79, Issue 8, Page(s) 1644–1655

    Abstract: Background: IsoLGs (isolevuglandins) are electrophilic products of lipid peroxidation formed in the presence of reactive oxygen species. IsoLGs contribute to hypertension by an unknown mechanism. Studies have shown that reactive oxygen species ... ...

    Abstract Background: IsoLGs (isolevuglandins) are electrophilic products of lipid peroxidation formed in the presence of reactive oxygen species. IsoLGs contribute to hypertension by an unknown mechanism. Studies have shown that reactive oxygen species production drives the formation of neutrophil extracellular traps (NETs) and that NETs accumulate within the aorta and kidneys of patients with hypertension. The purpose of this study was to determine the role of isoLGs in neutrophil migration and NET formation (NETosis) in hypertension.
    Methods: Mice were treated with Ang II (angiotensin II) and the specific isoLG scavenger 2-hydroxybenzylamine and examined for tissue neutrophil and NET accumulation by single-cell sequencing and flow cytometry. Isolated human neutrophils were studied to determine the role of isoLGs in NETosis and neutrophil chromatin expansion by immunofluorescence and live cell confocal microscopy.
    Results: Single-cell sequencing performed on sham, Ang II, and Ang II+2-hydroxybenzylamine treated mice revealed neutrophils as a primary target of 2-hydroxybenzylamine. Peripheral neutrophil migration, aortic NET accumulation, and renal NET accumulation is blocked with 2-hydroxybenzylamine treatment. In isolated human neutrophils, isoLGs accumulate during NETosis and scavenging of isoLGs prevents NETosis. IsoLGs drive neutrophil chromatin expansion during NETosis and disrupt nucleosome structure.
    Conclusions: These observations identified a critical role of isoLGs in neutrophil migration and NETosis in hypertension and provide a potential therapy for NET-associated diseases including hypertension and associated end organ damage.
    MeSH term(s) Animals ; Chromatin ; Extracellular Traps ; Humans ; Hypertension ; Lipids ; Mice ; Neutrophils ; Reactive Oxygen Species
    Chemical Substances Chromatin ; Lipids ; Reactive Oxygen Species ; isolevuglandin
    Language English
    Publishing date 2022-06-10
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Research Support, U.S. Gov't, Non-P.H.S.
    ZDB-ID 423736-5
    ISSN 1524-4563 ; 0194-911X ; 0362-4323
    ISSN (online) 1524-4563
    ISSN 0194-911X ; 0362-4323
    DOI 10.1161/HYPERTENSIONAHA.122.19305
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Rac1 promotes kidney collecting duct repair by mechanically coupling cell morphology to mitotic entry.

    Bock, Fabian / Dong, Xinyu / Li, Shensen / Viquez, Olga M / Sha, Eric / Tantengco, Matthew / Hennen, Elizabeth M / Plosa, Erin / Ramezani, Alireza / Brown, Kyle L / Whang, Young Mi / Terker, Andrew S / Arroyo, Juan Pablo / Harrison, David G / Fogo, Agnes / Brakebusch, Cord H / Pozzi, Ambra / Zent, Roy

    Science advances

    2024  Volume 10, Issue 6, Page(s) eadi7840

    Abstract: Prolonged obstruction of the ureter, which leads to injury of the kidney collecting ducts, results in permanent structural damage, while early reversal allows for repair. Cell structure is defined by the actin cytoskeleton, which is dynamically organized ...

    Abstract Prolonged obstruction of the ureter, which leads to injury of the kidney collecting ducts, results in permanent structural damage, while early reversal allows for repair. Cell structure is defined by the actin cytoskeleton, which is dynamically organized by small Rho guanosine triphosphatases (GTPases). In this study, we identified the Rho GTPase, Rac1, as a driver of postobstructive kidney collecting duct repair. After the relief of ureteric obstruction, Rac1 promoted actin cytoskeletal reconstitution, which was required to maintain normal mitotic morphology allowing for successful cell division. Mechanistically, Rac1 restricted excessive actomyosin activity that stabilized the negative mitotic entry kinase Wee1. This mechanism ensured mechanical G
    MeSH term(s) Kidney Tubules, Collecting/metabolism ; rac1 GTP-Binding Protein/metabolism ; Cytoskeleton/metabolism ; Actins/metabolism ; Actin Cytoskeleton/metabolism
    Chemical Substances rac1 GTP-Binding Protein (EC 3.6.5.2) ; Actins
    Language English
    Publishing date 2024-02-07
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2810933-8
    ISSN 2375-2548 ; 2375-2548
    ISSN (online) 2375-2548
    ISSN 2375-2548
    DOI 10.1126/sciadv.adi7840
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article: Immunoproteasomal Processing of Isolevuglandin Adducts in Hypertension.

    de la Visitación, Néstor / Chen, Wei / Krishnan, Jaya / Van Beusecum, Justin P / Amarnath, Venkataraman / Hennen, Elizabeth M / Zhao, Shilin / Saleem, Mohammad / Ao, Mingfang / Harrison, David G / Patrick, David M

    bioRxiv : the preprint server for biology

    2023  

    Abstract: Isolevuglandins (isoLGs) are lipid aldehydes that form in the presence of reactive oxygen species (ROS) and drive immune activation. We found that isoLG-adducts are presented within the context of major histocompatibility complexes (MHC-I) by an ... ...

    Abstract Isolevuglandins (isoLGs) are lipid aldehydes that form in the presence of reactive oxygen species (ROS) and drive immune activation. We found that isoLG-adducts are presented within the context of major histocompatibility complexes (MHC-I) by an immunoproteasome dependent mechanism. Pharmacologic inhibition of LMP7, the chymotrypsin subunit of the immunoproteasome, attenuates hypertension and tissue inflammation in the angiotensin II (Ang II) model of hypertension. Genetic loss of function of all immunoproteasome subunits or conditional deletion of LMP7 in dendritic cell (DCs) or endothelial cells (ECs) attenuated hypertension, reduced aortic T cell infiltration, and reduced isoLG-adduct MHC-I interaction. Furthermore, isoLG adducts structurally resemble double-stranded DNA and contribute to the activation of STING in ECs. These studies define a critical role of the immunoproteasome in the processing and presentation of isoLG-adducts. Moreover they define a role of LMP7 as a regulator of T cell activation and tissue infiltration in hypertension.
    Language English
    Publishing date 2023-04-12
    Publishing country United States
    Document type Preprint
    DOI 10.1101/2023.04.10.536054
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Evolution of the SARS-CoV-2 proteome in three dimensions (3D) during the first 6 months of the COVID-19 pandemic.

    Lubin, Joseph H / Zardecki, Christine / Dolan, Elliott M / Lu, Changpeng / Shen, Zhuofan / Dutta, Shuchismita / Westbrook, John D / Hudson, Brian P / Goodsell, David S / Williams, Jonathan K / Voigt, Maria / Sarma, Vidur / Xie, Lingjun / Venkatachalam, Thejasvi / Arnold, Steven / Alfaro Alvarado, Luz Helena / Catalfano, Kevin / Khan, Aaliyah / McCarthy, Erika /
    Staggers, Sophia / Tinsley, Brea / Trudeau, Alan / Singh, Jitendra / Whitmore, Lindsey / Zheng, Helen / Benedek, Matthew / Currier, Jenna / Dresel, Mark / Duvvuru, Ashish / Dyszel, Britney / Fingar, Emily / Hennen, Elizabeth M / Kirsch, Michael / Khan, Ali A / Labrie-Cleary, Charlotte / Laporte, Stephanie / Lenkeit, Evan / Martin, Kailey / Orellana, Marilyn / Ortiz-Alvarez de la Campa, Melanie / Paredes, Isaac / Wheeler, Baleigh / Rupert, Allison / Sam, Andrew / See, Katherine / Soto Zapata, Santiago / Craig, Paul A / Hall, Bonnie L / Jiang, Jennifer / Koeppe, Julia R / Mills, Stephen A / Pikaart, Michael J / Roberts, Rebecca / Bromberg, Yana / Hoyer, J Steen / Duffy, Siobain / Tischfield, Jay / Ruiz, Francesc X / Arnold, Eddy / Baum, Jean / Sandberg, Jesse / Brannigan, Grace / Khare, Sagar D / Burley, Stephen K

    Proteins

    2021  Volume 90, Issue 5, Page(s) 1054–1080

    Abstract: Understanding the molecular evolution of the SARS-CoV-2 virus as it continues to spread in communities around the globe is important for mitigation and future pandemic preparedness. Three-dimensional structures of SARS-CoV-2 proteins and those of other ... ...

    Abstract Understanding the molecular evolution of the SARS-CoV-2 virus as it continues to spread in communities around the globe is important for mitigation and future pandemic preparedness. Three-dimensional structures of SARS-CoV-2 proteins and those of other coronavirusess archived in the Protein Data Bank were used to analyze viral proteome evolution during the first 6 months of the COVID-19 pandemic. Analyses of spatial locations, chemical properties, and structural and energetic impacts of the observed amino acid changes in >48 000 viral isolates revealed how each one of 29 viral proteins have undergone amino acid changes. Catalytic residues in active sites and binding residues in protein-protein interfaces showed modest, but significant, numbers of substitutions, highlighting the mutational robustness of the viral proteome. Energetics calculations showed that the impact of substitutions on the thermodynamic stability of the proteome follows a universal bi-Gaussian distribution. Detailed results are presented for potential drug discovery targets and the four structural proteins that comprise the virion, highlighting substitutions with the potential to impact protein structure, enzyme activity, and protein-protein and protein-nucleic acid interfaces. Characterizing the evolution of the virus in three dimensions provides testable insights into viral protein function and should aid in structure-based drug discovery efforts as well as the prospective identification of amino acid substitutions with potential for drug resistance.
    MeSH term(s) Amino Acids ; COVID-19 ; Humans ; Pandemics ; Prospective Studies ; Proteome ; SARS-CoV-2 ; Viral Proteins/genetics ; Viral Proteins/metabolism
    Chemical Substances Amino Acids ; Proteome ; Viral Proteins
    Language English
    Publishing date 2021-10-09
    Publishing country United States
    Document type Journal Article ; Research Support, U.S. Gov't, Non-P.H.S. ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't
    ZDB-ID 806683-8
    ISSN 1097-0134 ; 0887-3585
    ISSN (online) 1097-0134
    ISSN 0887-3585
    DOI 10.1002/prot.26250
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article: Evolution of the SARS-CoV-2 proteome in three dimensions (3D) during the first six months of the COVID-19 pandemic.

    Lubin, Joseph H / Zardecki, Christine / Dolan, Elliott M / Lu, Changpeng / Shen, Zhuofan / Dutta, Shuchismita / Westbrook, John D / Hudson, Brian P / Goodsell, David S / Williams, Jonathan K / Voigt, Maria / Sarma, Vidur / Xie, Lingjun / Venkatachalam, Thejasvi / Arnold, Steven / Alvarado, Luz Helena Alfaro / Catalfano, Kevin / Khan, Aaliyah / McCarthy, Erika /
    Staggers, Sophia / Tinsley, Brea / Trudeau, Alan / Singh, Jitendra / Whitmore, Lindsey / Zheng, Helen / Benedek, Matthew / Currier, Jenna / Dresel, Mark / Duvvuru, Ashish / Dyszel, Britney / Fingar, Emily / Hennen, Elizabeth M / Kirsch, Michael / Khan, Ali A / Labrie-Cleary, Charlotte / Laporte, Stephanie / Lenkeit, Evan / Martin, Kailey / Orellana, Marilyn / de la Campa, Melanie Ortiz-Alvarez / Paredes, Isaac / Wheeler, Baleigh / Rupert, Allison / Sam, Andrew / See, Katherine / Zapata, Santiago Soto / Craig, Paul A / Hall, Bonnie L / Jiang, Jennifer / Koeppe, Julia R / Mills, Stephen A / Pikaart, Michael J / Roberts, Rebecca / Bromberg, Yana / Hoyer, J Steen / Duffy, Siobain / Tischfield, Jay / Ruiz, Francesc X / Arnold, Eddy / Baum, Jean / Sandberg, Jesse / Brannigan, Grace / Khare, Sagar D / Burley, Stephen K

    bioRxiv : the preprint server for biology

    2020  

    Abstract: Three-dimensional structures of SARS-CoV-2 and other coronaviral proteins archived in the Protein Data Bank were used to analyze viral proteome evolution during the first six months of the COVID-19 pandemic. Analyses of spatial locations, chemical ... ...

    Abstract Three-dimensional structures of SARS-CoV-2 and other coronaviral proteins archived in the Protein Data Bank were used to analyze viral proteome evolution during the first six months of the COVID-19 pandemic. Analyses of spatial locations, chemical properties, and structural and energetic impacts of the observed amino acid changes in >48,000 viral proteome sequences showed how each one of the 29 viral study proteins have undergone amino acid changes. Structural models computed for every unique sequence variant revealed that most substitutions map to protein surfaces and boundary layers with a minority affecting hydrophobic cores. Conservative changes were observed more frequently in cores
    Language English
    Publishing date 2020-12-07
    Publishing country United States
    Document type Preprint
    DOI 10.1101/2020.12.01.406637
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Evolution of the SARS-CoV-2 proteome in three dimensions (3D) during the first six months of the COVID-19 pandemic

    Lubin, Joseph H. / Zardecki, Christine / Dolan, Elliott M. / Lu, Changpeng / Shen, Zhuofan / Dutta, Shuchismita / Westbrook, John D. / Hudson, Brian P. / Goodsell, David S. / Williams, Jonathan K. / Voigt, Maria / Sarma, Vidur / Xie, Lingjun / Venkatachalam, Thejasvi / Arnold, Steven / Alfaro Alvarado, Luz Helena / Catalfano, Kevin / Khan, Aaliyah / McCarthy, Erika /
    Staggers, Sophia / Tinsley, Brea / Trudeau, Alan / Singh, Jitendra / Whitmore, Lindsey / Zheng, Helen / Benedek, Matthew / Currier, Jenna / Dresel, Mark / Duvvuru, Ashish / Dyszel, Britney / Fingar, Emily / Hennen, Elizabeth M. / Kirsch, Michael / Khan, Ali A. / Labrie-Cleary, Charlotte / Laporte, Stephanie / Lenkeit, Evan / Martin, Kailey / Orellana, Marilyn / Ortiz-Alvarez de la Campa, Melanie / Paredes, Isaac / Wheeler, Baleigh / Rupert, Allison / Sam, Andrew / See, Katherine / Soto Zapata, Santiago / Craig, Paul A. / Hall, Bonnie L. / Jiang, Jennifer / Koeppe, Julia R. / Mills, Stephen A. / Pikaart, Michael J. / Roberts, Rebecca / Bromberg, Yana / Hoyer, J. Steen / Duffy, Siobain / Tischfield, Jay / Ruiz, Francesc X. / Arnold, Eddy / Baum, Jean / Sandberg, Jesse / Brannigan, Grace / Khare, Sagar D. / Burley, Stephen K.

    bioRxiv

    Abstract: Three-dimensional structures of SARS-CoV-2 and other coronaviral proteins archived in the Protein Data Bank were used to analyze viral proteome evolution during the first six months of the COVID-19 pandemic. Analyses of spatial locations, chemical ... ...

    Abstract Three-dimensional structures of SARS-CoV-2 and other coronaviral proteins archived in the Protein Data Bank were used to analyze viral proteome evolution during the first six months of the COVID-19 pandemic. Analyses of spatial locations, chemical properties, and structural and energetic impacts of the observed amino acid changes in >48,000 viral proteome sequences showed how each one of the 29 viral study proteins have undergone amino acid changes. Structural models computed for every unique sequence variant revealed that most substitutions map to protein surfaces and boundary layers with a minority affecting hydrophobic cores. Conservative changes were observed more frequently in cores versus boundary layers/surfaces. Active sites and protein-protein interfaces showed modest numbers of substitutions. Energetics calculations showed that the impact of substitutions on the thermodynamic stability of the proteome follows a universal bi-Gaussian distribution. Detailed results are presented for six drug discovery targets and four structural proteins comprising the virion, highlighting substitutions with the potential to impact protein structure, enzyme activity, and functional interfaces. Characterizing the evolution of the virus in three dimensions provides testable insights into viral protein function and should aid in structure-based drug discovery efforts as well as the prospective identification of amino acid substitutions with potential for drug resistance.
    Keywords covid19
    Language English
    Publishing date 2020-12-01
    Publisher Cold Spring Harbor Laboratory
    Document type Article ; Online
    DOI 10.1101/2020.12.01.406637
    Database COVID19

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