LIVIVO - The Search Portal for Life Sciences

zur deutschen Oberfläche wechseln
Advanced search

Search results

Result 1 - 10 of total 20

Search options

  1. Article ; Online: Survey of extracellular communication of systemic and organ-specific inflammatory responses through cell free messenger RNA profiling in mice.

    Zhuang, Jiali / Ibarra, Arkaitz / Acosta, Alexander / Karns, Amy P / Aballi, Jonathan / Nerenberg, Michael / Sninsky, John J / Quake, Stephen R / Toden, Shusuke

    EBioMedicine

    2022  Volume 83, Page(s) 104242

    Abstract: Background: Inflammatory and immune responses are essential and dynamic biological processes that protect the body against acute and chronic adverse stimuli. While conventional protein markers have been used to evaluate systemic inflammatory response, ... ...

    Abstract Background: Inflammatory and immune responses are essential and dynamic biological processes that protect the body against acute and chronic adverse stimuli. While conventional protein markers have been used to evaluate systemic inflammatory response, the immunological response to stimulation is complex and involves modulation of a large set of genes and interacting signalling pathways of innate and adaptive immune systems. There is a need for a non-invasive tool that can comprehensively evaluate and monitor molecular dysregulations associated with inflammatory and immune responses in circulation and in inaccessible solid organs.
    Methods: Here we utilized cell-free messenger RNA (cf-mRNA) RNA-Seq whole transcriptome profiling and computational biology to temporally assess lipopolysaccharide (LPS) induced and JAK inhibitor modulated inflammatory and immune responses in mouse plasma samples.
    Findings: Cf-mRNA profiling displayed a pattern of systemic immune responses elicited by LPS and dysregulation of associated pathways. Moreover, attenuation of several inflammatory pathways, including STAT and interferon pathways, were observed following the treatment of JAK inhibitor. We further identified the dysregulation of liver-specific transcripts in cf-mRNA which reflected changes in the gene-expression pattern in this generally inaccessible biological compartment.
    Interpretation: Using a preclinical mouse model, we demonstrated the potential of plasma cf-mRNA profiling for systemic and organ-specific characterization of drug-induced molecular alterations that are associated with inflammatory and immune responses.
    Funding: Molecular Stethoscope.
    MeSH term(s) Animals ; Cell Communication ; Cell-Free Nucleic Acids ; Gene Expression Profiling ; Interferons ; Janus Kinase Inhibitors ; Lipopolysaccharides/adverse effects ; Mice ; RNA, Messenger/genetics
    Chemical Substances Cell-Free Nucleic Acids ; Janus Kinase Inhibitors ; Lipopolysaccharides ; RNA, Messenger ; Interferons (9008-11-1)
    Language English
    Publishing date 2022-08-30
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 2851331-9
    ISSN 2352-3964
    ISSN (online) 2352-3964
    DOI 10.1016/j.ebiom.2022.104242
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  2. Article ; Online: Tpr regulates the total number of nuclear pore complexes per cell nucleus.

    McCloskey, Asako / Ibarra, Arkaitz / Hetzer, Martin W

    Genes & development

    2018  Volume 32, Issue 19-20, Page(s) 1321–1331

    Abstract: The total number of nuclear pore complexes (NPCs) per nucleus varies greatly between different cell types and is known to change during cell differentiation and cell transformation. However, the underlying mechanisms that control how many nuclear ... ...

    Abstract The total number of nuclear pore complexes (NPCs) per nucleus varies greatly between different cell types and is known to change during cell differentiation and cell transformation. However, the underlying mechanisms that control how many nuclear transport channels are assembled into a given nuclear envelope remain unclear. Here, we report that depletion of the NPC basket protein Tpr, but not Nup153, dramatically increases the total NPC number in various cell types. This negative regulation of Tpr occurs via a phosphorylation cascade of extracellular signal-regulated kinase (ERK), the central kinase of the mitogen-activated protein kinase (MAPK) pathway. Tpr serves as a scaffold for ERK to phosphorylate the nucleoporin (Nup) Nup153, which is critical for early stages of NPC biogenesis. Our results reveal a critical role of the Nup Tpr in coordinating signal transduction pathways during cell proliferation and the dynamic organization of the nucleus.
    MeSH term(s) Animals ; Cells, Cultured ; Extracellular Signal-Regulated MAP Kinases/metabolism ; Humans ; Interphase ; Mice ; Nuclear Envelope/metabolism ; Nuclear Pore/physiology ; Nuclear Pore Complex Proteins/metabolism ; Nuclear Pore Complex Proteins/physiology ; Proto-Oncogene Proteins/metabolism ; Proto-Oncogene Proteins/physiology
    Chemical Substances NUP153 protein, human ; Nuclear Pore Complex Proteins ; Proto-Oncogene Proteins ; TPR protein, human ; TPR protein, mouse ; Extracellular Signal-Regulated MAP Kinases (EC 2.7.11.24)
    Language English
    Publishing date 2018-09-18
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't
    ZDB-ID 806684-x
    ISSN 1549-5477 ; 0890-9369
    ISSN (online) 1549-5477
    ISSN 0890-9369
    DOI 10.1101/gad.315523.118
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  3. Article ; Online: Circulating cell-free messenger RNA secretome characterization of primary sclerosing cholangitis.

    Chalasani, Naga / Vuppalanchi, Raj / Lammert, Craig / Gawrieh, Samer / Braun, Jerome V / Zhuang, Jiali / Ibarra, Arkaitz / Ross, David A / Nerenberg, Michael / Quake, Stephen R / Sninsky, John J / Toden, Shusuke

    Hepatology communications

    2023  Volume 7, Issue 6

    Abstract: Background: Primary sclerosing cholangitis (PSC) is a rare chronic cholestatic liver disease characterized by multifocal bile duct strictures. To date, underlying molecular mechanisms of PSC remain unclear, and therapeutic options are limited.: ... ...

    Abstract Background: Primary sclerosing cholangitis (PSC) is a rare chronic cholestatic liver disease characterized by multifocal bile duct strictures. To date, underlying molecular mechanisms of PSC remain unclear, and therapeutic options are limited.
    Methods: We performed cell-free messenger RNA (cf-mRNA) sequencing to characterize the circulating transcriptome of PSC and noninvasively investigate potentially bioactive signals that are associated with PSC. Serum cf-mRNA profiles were compared among 50 individuals with PSC, 20 healthy controls, and 235 individuals with NAFLD. Tissue and cell type-of-origin genes that are dysregulated in subjects with PSC were evaluated. Subsequently, diagnostic classifiers were developed using PSC dysregulated cf-mRNA genes.
    Results: Differential expression analysis of the cf-mRNA transcriptomes of PSC and healthy controls resulted in identification of 1407 dysregulated genes. Furthermore, differentially expressed genes between PSC and healthy controls or NAFLD shared common genes known to be involved in liver pathophysiology. In particular, genes from liver- and specific cell type-origin, including hepatocyte, HSCs, and KCs, were highly abundant in cf-mRNA of subjects with PSC. Gene cluster analysis revealed that liver-specific genes dysregulated in PSC form a distinct cluster, which corresponded to a subset of the PSC subject population. Finally, we developed a cf-mRNA diagnostic classifier using liver-specific genes that discriminated PSC from healthy control subjects using gene transcripts of liver origin.
    Conclusions: Blood-based whole-transcriptome cf-mRNA profiling revealed high abundance of liver-specific genes in sera of subjects with PSC, which may be used to diagnose patients with PSC. We identified several unique cf-mRNA profiles of subjects with PSC. These findings may also have utility for noninvasive molecular stratification of subjects with PSC for pharmacotherapy safety and response studies.
    MeSH term(s) Humans ; Non-alcoholic Fatty Liver Disease ; Cholangitis, Sclerosing ; Secretome ; Cell-Free Nucleic Acids ; Cholestasis ; RNA, Messenger
    Chemical Substances Cell-Free Nucleic Acids ; RNA, Messenger
    Language English
    Publishing date 2023-05-23
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ISSN 2471-254X
    ISSN (online) 2471-254X
    DOI 10.1097/HC9.0000000000000140
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  4. Article ; Online: Nuclear pore proteins and the control of genome functions.

    Ibarra, Arkaitz / Hetzer, Martin W

    Genes & development

    2015  Volume 29, Issue 4, Page(s) 337–349

    Abstract: Nuclear pore complexes (NPCs) are composed of several copies of ∼30 different proteins called nucleoporins (Nups). NPCs penetrate the nuclear envelope (NE) and regulate the nucleocytoplasmic trafficking of macromolecules. Beyond this vital role, NPC ... ...

    Abstract Nuclear pore complexes (NPCs) are composed of several copies of ∼30 different proteins called nucleoporins (Nups). NPCs penetrate the nuclear envelope (NE) and regulate the nucleocytoplasmic trafficking of macromolecules. Beyond this vital role, NPC components influence genome functions in a transport-independent manner. Nups play an evolutionarily conserved role in gene expression regulation that, in metazoans, extends into the nuclear interior. Additionally, in proliferative cells, Nups play a crucial role in genome integrity maintenance and mitotic progression. Here we discuss genome-related functions of Nups and their impact on essential DNA metabolism processes such as transcription, chromosome duplication, and segregation.
    MeSH term(s) Animals ; Chromosome Duplication/genetics ; Chromosome Segregation/genetics ; Gene Expression Regulation ; Genome ; Genomic Instability ; Humans ; Nuclear Pore Complex Proteins/genetics ; Nuclear Pore Complex Proteins/metabolism
    Chemical Substances Nuclear Pore Complex Proteins
    Language English
    Publishing date 2015-02-15
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't ; Review
    ZDB-ID 806684-x
    ISSN 1549-5477 ; 0890-9369
    ISSN (online) 1549-5477
    ISSN 0890-9369
    DOI 10.1101/gad.256495.114
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  5. Article ; Online: Transcriptomic recurrence score improves recurrence prediction for surgically treated patients with intermediate-risk clear cell kidney cancer.

    Patel, Neal / Hakansson, Alexander / Ohtake, Shinji / Muraki, Peter / Proudfout, James A / Liu, Yang / Webber, Lisa / Ibarra, Arkaitz / Liu, Vinnie Y T / Davicioni, Elai / Chamie, Karim / Pantuck, Allan / Shuch, Brian

    Cancer medicine

    2022  Volume 12, Issue 5, Page(s) 6437–6444

    Abstract: Background: Risk stratification of kidney cancer patients after nephrectomy may tailor surveillance intensity and selection for adjuvant therapy. Transcriptomic approaches are effective in predicting recurrence, but whether they add value to ... ...

    Abstract Background: Risk stratification of kidney cancer patients after nephrectomy may tailor surveillance intensity and selection for adjuvant therapy. Transcriptomic approaches are effective in predicting recurrence, but whether they add value to clinicopathologic models remains unclear.
    Methods: Data from patients with clear cell renal cell carcinoma (ccRCC) was downloaded from The Cancer Genome Atlas. Clinicopathologic variables were used to calculate SSIGN (stage, size, grade, and necrosis) scores. The 16 gene recurrence score (RS) signature was generated using RNA-seq data. Transcriptomic risk groups were calculated using the original thresholds. SSIGN groups were divided into low, intermediate, and high risk. Disease-free status was the primary endpoint assessed.
    Results: SSIGN and RS were calculated for 428 patients with non-metastatic ccRCC. SSIGN low-, intermediate-, and high-risk groups demonstrated 2.7%, 15.2%, and 27.5%, 3-year recurrence risk, respectively. On multivariable analysis, the RS was associated with disease-free status (sub-distribution hazard ratio (sHR) 1.43 per 25 RS [95% CI (1.00-1.43)], p = 0.05). By risk groups, RS further risk stratified the SSIGN intermediate-risk group (sHR 2.22 [95% CI 1.10-4.50], p = 0.03). SSIGN intermediate-risk patients with low and high RS had a 3-year recurrence rate of 8.0% and 25.2%, respectively. Within this risk group, the area under the curve (AUC) at 3 years was 0.69 for SSIGN, 0.74 for RS, and 0.78 for their combination.
    Conclusions: Transcriptomic recurrence scores improve risk prediction even when controlling for clinicopathologic factors. Utility may be best suited for intermediate-risk patients who have heterogeneous outcomes and further refinement for clinical utility is warranted.
    MeSH term(s) Humans ; Carcinoma, Renal Cell/genetics ; Carcinoma, Renal Cell/surgery ; Carcinoma, Renal Cell/pathology ; Transcriptome ; Neoplasm Staging ; Kidney Neoplasms/genetics ; Kidney Neoplasms/surgery ; Kidney Neoplasms/pathology ; Risk Factors ; Nephrectomy ; Neoplasm Recurrence, Local/genetics ; Neoplasm Recurrence, Local/pathology ; Prognosis
    Language English
    Publishing date 2022-11-17
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2659751-2
    ISSN 2045-7634 ; 2045-7634
    ISSN (online) 2045-7634
    ISSN 2045-7634
    DOI 10.1002/cam4.5399
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  6. Article ; Online: Survey of extracellular communication of systemic and organ-specific inflammatory responses through cell free messenger RNA profiling in mice

    Jiali Zhuang / Arkaitz Ibarra / Alexander Acosta / Amy P. Karns / Jonathan Aballi / Michael Nerenberg / John J. Sninsky / Stephen R. Quake / Shusuke Toden

    EBioMedicine, Vol 83, Iss , Pp 104242- (2022)

    2022  

    Abstract: Summary: Background: Inflammatory and immune responses are essential and dynamic biological processes that protect the body against acute and chronic adverse stimuli. While conventional protein markers have been used to evaluate systemic inflammatory ... ...

    Abstract Summary: Background: Inflammatory and immune responses are essential and dynamic biological processes that protect the body against acute and chronic adverse stimuli. While conventional protein markers have been used to evaluate systemic inflammatory response, the immunological response to stimulation is complex and involves modulation of a large set of genes and interacting signalling pathways of innate and adaptive immune systems. There is a need for a non-invasive tool that can comprehensively evaluate and monitor molecular dysregulations associated with inflammatory and immune responses in circulation and in inaccessible solid organs. Methods: Here we utilized cell-free messenger RNA (cf-mRNA) RNA-Seq whole transcriptome profiling and computational biology to temporally assess lipopolysaccharide (LPS) induced and JAK inhibitor modulated inflammatory and immune responses in mouse plasma samples. Findings: Cf-mRNA profiling displayed a pattern of systemic immune responses elicited by LPS and dysregulation of associated pathways. Moreover, attenuation of several inflammatory pathways, including STAT and interferon pathways, were observed following the treatment of JAK inhibitor. We further identified the dysregulation of liver-specific transcripts in cf-mRNA which reflected changes in the gene-expression pattern in this generally inaccessible biological compartment. Interpretation: Using a preclinical mouse model, we demonstrated the potential of plasma cf-mRNA profiling for systemic and organ-specific characterization of drug-induced molecular alterations that are associated with inflammatory and immune responses. Funding: Molecular Stethoscope.
    Keywords Cell free messenger RNA ; Inflammation ; Systemic inflammatory response ; Liquid biopsy ; Medicine ; R ; Medicine (General) ; R5-920
    Subject code 616 ; 610
    Language English
    Publishing date 2022-09-01T00:00:00Z
    Publisher Elsevier
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    More links

    Kategorien

  7. Article ; Online: Predicting age from the transcriptome of human dermal fibroblasts.

    Fleischer, Jason G / Schulte, Roberta / Tsai, Hsiao H / Tyagi, Swati / Ibarra, Arkaitz / Shokhirev, Maxim N / Huang, Ling / Hetzer, Martin W / Navlakha, Saket

    Genome biology

    2018  Volume 19, Issue 1, Page(s) 221

    Abstract: Biomarkers of aging can be used to assess the health of individuals and to study aging and age-related diseases. We generate a large dataset of genome-wide RNA-seq profiles of human dermal fibroblasts from 133 people aged 1 to 94 years old to test ... ...

    Abstract Biomarkers of aging can be used to assess the health of individuals and to study aging and age-related diseases. We generate a large dataset of genome-wide RNA-seq profiles of human dermal fibroblasts from 133 people aged 1 to 94 years old to test whether signatures of aging are encoded within the transcriptome. We develop an ensemble machine learning method that predicts age to a median error of 4 years, outperforming previous methods used to predict age. The ensemble was further validated by testing it on ten progeria patients, and our method is the only one that predicts accelerated aging in these patients.
    MeSH term(s) Adolescent ; Adult ; Aged ; Aged, 80 and over ; Aging/metabolism ; Child ; Child, Preschool ; Fibroblasts/metabolism ; Gene Expression Profiling ; Genomics/methods ; Humans ; Machine Learning ; Middle Aged ; Progeria/metabolism ; Transcriptome ; Young Adult
    Language English
    Publishing date 2018-12-20
    Publishing country England
    Document type Evaluation Study ; Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't
    ZDB-ID 2040529-7
    ISSN 1474-760X ; 1474-760X
    ISSN (online) 1474-760X
    ISSN 1474-760X
    DOI 10.1186/s13059-018-1599-6
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  8. Article ; Online: Nucleoporin-mediated regulation of cell identity genes.

    Ibarra, Arkaitz / Benner, Chris / Tyagi, Swati / Cool, Jonah / Hetzer, Martin W

    Genes & development

    2016  Volume 30, Issue 20, Page(s) 2253–2258

    Abstract: The organization of the genome in the three-dimensional space of the nucleus is coupled with cell type-specific gene expression. However, how nuclear architecture influences transcription that governs cell identity remains unknown. Here, we show that ... ...

    Abstract The organization of the genome in the three-dimensional space of the nucleus is coupled with cell type-specific gene expression. However, how nuclear architecture influences transcription that governs cell identity remains unknown. Here, we show that nuclear pore complex (NPC) components Nup93 and Nup153 bind superenhancers (SE), regulatory structures that drive the expression of key genes that specify cell identity. We found that nucleoporin-associated SEs localize preferentially to the nuclear periphery, and absence of Nup153 and Nup93 results in dramatic transcriptional changes of SE-associated genes. Our results reveal a crucial role of NPC components in the regulation of cell type-specifying genes and highlight nuclear architecture as a regulatory layer of genome functions in cell fate.
    MeSH term(s) Cell Differentiation/genetics ; Cell Line, Tumor ; Cell Nucleus/genetics ; Cell Nucleus/metabolism ; Chromatin/metabolism ; Enhancer Elements, Genetic/physiology ; Gene Expression Regulation/genetics ; Genome/genetics ; Humans ; Nuclear Envelope/metabolism ; Nuclear Pore Complex Proteins/genetics ; Nuclear Pore Complex Proteins/metabolism ; Protein Binding ; Protein Transport
    Chemical Substances Chromatin ; NUP153 protein, human ; Nuclear Pore Complex Proteins
    Language English
    Publishing date 2016-11-02
    Publishing country United States
    Document type Journal Article
    ZDB-ID 806684-x
    ISSN 1549-5477 ; 0890-9369
    ISSN (online) 1549-5477
    ISSN 0890-9369
    DOI 10.1101/gad.287417.116
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  9. Article ; Online: Noninvasive characterization of Alzheimer's disease by circulating, cell-free messenger RNA next-generation sequencing.

    Toden, Shusuke / Zhuang, Jiali / Acosta, Alexander D / Karns, Amy P / Salathia, Neeraj S / Brewer, James B / Wilcock, Donna M / Aballi, Jonathan / Nerenberg, Mike / Quake, Stephen R / Ibarra, Arkaitz

    Science advances

    2020  Volume 6, Issue 50

    Abstract: The lack of accessible noninvasive tools to examine the molecular alterations occurring in the brain limits our understanding of the causes and progression of Alzheimer's disease (AD), as well as the identification of effective therapeutic strategies. ... ...

    Abstract The lack of accessible noninvasive tools to examine the molecular alterations occurring in the brain limits our understanding of the causes and progression of Alzheimer's disease (AD), as well as the identification of effective therapeutic strategies. Here, we conducted a comprehensive profiling of circulating, cell-free messenger RNA (cf-mRNA) in plasma of 126 patients with AD and 116 healthy controls of similar age. We identified 2591 dysregulated genes in the cf-mRNA of patients with AD, which are enriched in biological processes well known to be associated with AD. Dysregulated genes included brain-specific genes and resembled those identified to be dysregulated in postmortem AD brain tissue. Furthermore, we identified disease-relevant circulating gene transcripts that correlated with the severity of cognitive impairment. These data highlight the potential of high-throughput cf-mRNA sequencing to evaluate AD-related pathophysiological alterations in the brain, leading to precision healthcare solutions that could improve AD patient management.
    MeSH term(s) Alzheimer Disease/genetics ; Brain ; Cell-Free Nucleic Acids ; Gene Expression Profiling ; High-Throughput Nucleotide Sequencing ; Humans ; RNA, Messenger/genetics
    Chemical Substances Cell-Free Nucleic Acids ; RNA, Messenger
    Language English
    Publishing date 2020-12-09
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't
    ZDB-ID 2810933-8
    ISSN 2375-2548 ; 2375-2548
    ISSN (online) 2375-2548
    ISSN 2375-2548
    DOI 10.1126/sciadv.abb1654
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  10. Article ; Online: Non-invasive characterization of human bone marrow stimulation and reconstitution by cell-free messenger RNA sequencing

    Arkaitz Ibarra / Jiali Zhuang / Yue Zhao / Neeraj S. Salathia / Vera Huang / Alexander D. Acosta / Jonathan Aballi / Shusuke Toden / Amy P. Karns / Intan Purnajo / Julianna R. Parks / Lucy Guo / James Mason / Darren Sigal / Tina S. Nova / Stephen R. Quake / Michael Nerenberg

    Nature Communications, Vol 11, Iss 1, Pp 1-

    2020  Volume 11

    Abstract: Circulating cell-free mRNA holds great promise as a non-invasive diagnostic biomarker. Here the authors show that cell-free mRNA captures transcripts from the bone marrow and can be used to non-invasively monitor dynamic changes in bone marrow physiology. ...

    Abstract Circulating cell-free mRNA holds great promise as a non-invasive diagnostic biomarker. Here the authors show that cell-free mRNA captures transcripts from the bone marrow and can be used to non-invasively monitor dynamic changes in bone marrow physiology.
    Keywords Science ; Q
    Language English
    Publishing date 2020-01-01T00:00:00Z
    Publisher Nature Publishing Group
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    More links

    Kategorien

To top