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  1. Article ; Online: A Workflow Guide to RNA-Seq Analysis of Chaperone Function and Beyond.

    Holton, Kristina M / Giadone, Richard M / Lang, Benjamin J / Calderwood, Stuart K

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

    2023  Volume 2693, Page(s) 39–60

    Abstract: RNA sequencing (RNA-seq) is a powerful method of transcriptional analysis that allows for the sequence identification and quantification of cellular transcripts. RNA-seq can be used for differential gene expression (DGE) analysis, gene fusion detection, ... ...

    Abstract RNA sequencing (RNA-seq) is a powerful method of transcriptional analysis that allows for the sequence identification and quantification of cellular transcripts. RNA-seq can be used for differential gene expression (DGE) analysis, gene fusion detection, allele-specific expression, isoform and splice variant quantification, and identification of novel genes. These applications can be used for downstream systems biology analyses such as gene ontology or pathway analysis to provide insight into processes altered between biological conditions. Given the wide range of signaling pathways subject to chaperone activity as well as numerous chaperone functions in RNA metabolism, RNA-seq may provide a valuable tool for the study of chaperone proteins in biology and disease. This chapter outlines an example RNA-seq workflow to determine differentially expressed (DE) genes between two or more sample conditions and provides some considerations for RNA-seq experimental design.
    MeSH term(s) RNA-Seq ; Workflow ; High-Throughput Nucleotide Sequencing/methods ; Molecular Chaperones/genetics ; Sequence Analysis, RNA/methods ; Gene Expression Profiling/methods ; Transcriptome
    Chemical Substances Molecular Chaperones
    Language English
    Publishing date 2023-08-04
    Publishing country United States
    Document type Journal Article
    ISSN 1940-6029
    ISSN (online) 1940-6029
    DOI 10.1007/978-1-0716-3342-7_4
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article: Analyzing the ER stress response in ALS patient derived motor neurons identifies druggable neuroprotective targets.

    Watts, Michelle E / Giadone, Richard M / Ordureau, Alban / Holton, Kristina M / Harper, J Wade / Rubin, Lee L

    Frontiers in cellular neuroscience

    2024  Volume 17, Page(s) 1327361

    Abstract: Amyotrophic lateral sclerosis (ALS) is a degenerative motor neuron (MN) disease with severely limited treatment options. Identification of effective treatments has been limited in part by the lack of predictive animal models for complex human disorders. ... ...

    Abstract Amyotrophic lateral sclerosis (ALS) is a degenerative motor neuron (MN) disease with severely limited treatment options. Identification of effective treatments has been limited in part by the lack of predictive animal models for complex human disorders. Here, we utilized pharmacologic ER stressors to exacerbate underlying sensitivities conferred by ALS patient genetics in induced pluripotent stem cell (iPSC)-derived motor neurons (MNs). In doing so, we found that thapsigargin and tunicamycin exposure recapitulated ALS-associated degeneration, and that we could rescue this degeneration via MAP4K4 inhibition (MAP4K4i). We subsequently identified mechanisms underlying MAP4K4i-mediated protection by performing phosphoproteomics on iPSC-derived MNs treated with ER stressors ±MAP4K4i. Through these analyses, we found JNK, PKC, and BRAF to be differentially modulated in MAP4K4i-protected MNs, and that inhibitors to these proteins could also rescue MN toxicity. Collectively, this study highlights the value of utilizing ER stressors in ALS patient MNs to identify novel druggable targets.
    Language English
    Publishing date 2024-01-19
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2452963-1
    ISSN 1662-5102
    ISSN 1662-5102
    DOI 10.3389/fncel.2023.1327361
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article: A longevity-specific bank of induced pluripotent stem cells from centenarians and their offspring.

    Dowrey, Todd W / Cranston, Samuel F / Skvir, Nicholas / Lok, Yvonne / Gould, Brian / Petrowitz, Bradley / Villar, Daniel / Shan, Jidong / James, Marianne / Dodge, Mark / Belkina, Anna C / Giadone, Richard M / Sebastiani, Paola / Perls, Thomas T / Andersen, Stacy L / Murphy, George J

    bioRxiv : the preprint server for biology

    2024  

    Abstract: Centenarians provide a unique lens through which to study longevity, healthy aging, and resiliency. Moreover, models ... ...

    Abstract Centenarians provide a unique lens through which to study longevity, healthy aging, and resiliency. Moreover, models of
    Language English
    Publishing date 2024-03-14
    Publishing country United States
    Document type Preprint
    DOI 10.1101/2024.03.12.584663
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Expression Levels of Lamin A or C Are Critical to Nuclear Maturation, Functional Responses, and Gene Expression Profiles in Differentiating Mouse Neutrophils.

    Szymczak, Klaudia / Pelletier, Margery G H / Malu, Krishnakumar / Barbeau, Anna M / Giadone, Richard M / Babroudi, Seda C / Gaines, Peter C W

    ImmunoHorizons

    2022  Volume 6, Issue 1, Page(s) 16–35

    Abstract: Neutrophils mediate critical innate immune responses by migrating to sites of infection or inflammation, phagocytosing microorganisms, and releasing an arsenal of antimicrobial agents, including reactive oxygen species. These functions are shared by ... ...

    Abstract Neutrophils mediate critical innate immune responses by migrating to sites of infection or inflammation, phagocytosing microorganisms, and releasing an arsenal of antimicrobial agents, including reactive oxygen species. These functions are shared by other innate immune cell types, but an interesting feature of neutrophils is their hallmark lobulated nuclei. Although why this bizarre nuclear shape forms is still being elucidated, studies of two intermediate filament proteins that associate with the nuclear envelope, lamin A and C, indicate that expression levels of these proteins govern nuclear maturation. These A-type lamins also modulate nuclear stiffness, the loss of which may be critical to the migration of not only neutrophils but also cancer cells that become prone to metastasis. We investigated whether increased expression of either lamin A or C affects neutrophil nuclear morphologic maturation, but more importantly we tested whether overexpression of either lamin also affects neutrophil functional responses, using two mouse myeloid progenitor models that can be induced toward functionally responsive neutrophil-like cells. Collectively, our results demonstrate that overexpression of either lamin A or C not only disrupts nuclear lobulation but also causes aberrant functional responses critical to innate immunity, including chemotaxis, phagocytosis, and reactive oxygen species production. Moreover, the lamin A-overexpressing cells exhibit decreased expression of a critical NADPH oxidase complex factor, gp91
    MeSH term(s) Animals ; Cell Differentiation/genetics ; Cell Line ; Cell Nucleus/genetics ; Chemotaxis/genetics ; Immunity, Innate ; Lamin Type A/genetics ; Lamin Type A/metabolism ; Mice ; NADPH Oxidase 2/metabolism ; Neutrophils/metabolism ; Phagocytosis/genetics ; Transcriptome
    Chemical Substances Lamin Type A ; Lmna protein, mouse ; NADPH Oxidase 2 (EC 1.6.3.-)
    Language English
    Publishing date 2022-01-17
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Extramural
    ISSN 2573-7732
    ISSN (online) 2573-7732
    DOI 10.4049/immunohorizons.2100072
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article: Abnormal global longitudinal strain and reduced serum inflammatory markers in cardiac AL amyloidosis patients without significant amyloid fibril deposition.

    Edwards, Camille V / Ferri, Grace M / Villegas-Galaviz, Josue / Ghosh, Sabrina / Bawa, Pushpinder Singh / Wang, Feiya / Klimtchuk, Elena / Ajayi, Tinuola B / Morgan, Gareth J / Prokaeva, Tatiana / Staron, Andrew / Ruberg, Frederick L / Sanchorawala, Vaishali / Giadone, Richard M / Murphy, George J

    bioRxiv : the preprint server for biology

    2024  

    Abstract: Background: Cardiac dysfunction in AL amyloidosis is thought to be partly related to the direct impact of AL LCs on cardiomyocyte function, with the degree of dysfunction at diagnosis as a major determinant of clinical outcomes. Nonetheless, mechanisms ... ...

    Abstract Background: Cardiac dysfunction in AL amyloidosis is thought to be partly related to the direct impact of AL LCs on cardiomyocyte function, with the degree of dysfunction at diagnosis as a major determinant of clinical outcomes. Nonetheless, mechanisms underlying LC-induced myocardial toxicity are not well understood.
    Methods: We identified gene expression changes correlating with human cardiac cells exposed to a cardiomyopathy-associated κAL LC. We then sought to confirm these findings in a clinical dataset by focusing on clinical parameters associated with the pathways dysregulated at the gene expression level.
    Results: Upon exposure to a cardiomyopathy-associated κAL LC, cardiac cells exhibited gene expression changes related to myocardial contractile function and inflammation, leading us to hypothesize that there could be clinically detectable changes in GLS on echocardiogram and serum inflammatory markers in patients. Thus, we identified 29 patients with normal IVSd but abnormal cardiac biomarkers suggestive of LC-induced cardiac dysfunction. These patients display early cardiac biomarker staging, abnormal GLS, and significantly reduced serum inflammatory markers compared to patients with clinically evident amyloid fibril deposition.
    Conclusion: Collectively, our findings highlight early molecular and functional signatures of cardiac AL amyloidosis, with potential impact for developing improved patient biomarkers and novel therapeutics.
    Language English
    Publishing date 2024-03-16
    Publishing country United States
    Document type Preprint
    DOI 10.1101/2024.03.14.584987
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Mapping cellular response to destabilized transthyretin reveals cell- and amyloidogenic protein-specific signatures.

    Ghosh, Sabrina / Villacorta-Martin, Carlos / Lindstrom-Vautrin, Jonathan / Kenney, Devin / Golden, Carly S / Edwards, Camille V / Sanchorawala, Vaishali / Connors, Lawreen H / Giadone, Richard M / Murphy, George J

    Amyloid : the international journal of experimental and clinical investigation : the official journal of the International Society of Amyloidosis

    2023  Volume 30, Issue 4, Page(s) 379–393

    Abstract: Background: In ATTR amyloidosis, transthyretin (TTR) protein is secreted from the liver and deposited as toxic aggregates at downstream target tissues. Despite recent advancements in treatments for ATTR amyloidosis, the mechanisms underlying misfolded ... ...

    Abstract Background: In ATTR amyloidosis, transthyretin (TTR) protein is secreted from the liver and deposited as toxic aggregates at downstream target tissues. Despite recent advancements in treatments for ATTR amyloidosis, the mechanisms underlying misfolded TTR-mediated cellular damage remain elusive.
    Methods: In an effort to define early events of TTR-associated stress, we exposed neuronal (SH-SY5Y) and cardiac (AC16) cells to wild-type and destabilized TTR variants (TTR
    Results: In doing so, we observed overlapping, yet distinct cell type- and amyloidogenic protein-specific signatures, suggesting unique responses to each amyloidogenic variant. Moreover, we identified chromatin level changes in AC16 cells exposed to mutant TTR that resolved upon pre-incubation with kinetic stabilizer tafamidis.
    Conclusions: Collectively, these data provide insight into the mechanisms underlying destabilized protein-mediated cellular damage and provide a robust resource representing cellular responses to aggregation-prone proteins and ER stress.
    MeSH term(s) Humans ; Amyloid Neuropathies, Familial/complications ; Amyloidogenic Proteins/genetics ; Amyloidosis/metabolism ; Neuroblastoma/complications ; Neurons/metabolism ; Prealbumin/genetics ; Prealbumin/metabolism
    Chemical Substances Amyloidogenic Proteins ; Prealbumin ; TTR protein, human
    Language English
    Publishing date 2023-07-13
    Publishing country England
    Document type Journal Article
    ZDB-ID 1205246-2
    ISSN 1744-2818 ; 1350-6129
    ISSN (online) 1744-2818
    ISSN 1350-6129
    DOI 10.1080/13506129.2023.2224494
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Heterochronic parabiosis reprograms the mouse brain transcriptome by shifting aging signatures in multiple cell types.

    Ximerakis, Methodios / Holton, Kristina M / Giadone, Richard M / Ozek, Ceren / Saxena, Monika / Santiago, Samara / Adiconis, Xian / Dionne, Danielle / Nguyen, Lan / Shah, Kavya M / Goldstein, Jill M / Gasperini, Caterina / Gampierakis, Ioannis A / Lipnick, Scott L / Simmons, Sean K / Buchanan, Sean M / Wagers, Amy J / Regev, Aviv / Levin, Joshua Z /
    Rubin, Lee L

    Nature aging

    2023  Volume 3, Issue 3, Page(s) 327–345

    Abstract: Aging is a complex process involving transcriptomic changes associated with deterioration across multiple tissues and organs, including the brain. Recent studies using heterochronic parabiosis have shown that various aspects of aging-associated decline ... ...

    Abstract Aging is a complex process involving transcriptomic changes associated with deterioration across multiple tissues and organs, including the brain. Recent studies using heterochronic parabiosis have shown that various aspects of aging-associated decline are modifiable or even reversible. To better understand how this occurs, we performed single-cell transcriptomic profiling of young and old mouse brains after parabiosis. For each cell type, we cataloged alterations in gene expression, molecular pathways, transcriptional networks, ligand-receptor interactions and senescence status. Our analyses identified gene signatures, demonstrating that heterochronic parabiosis regulates several hallmarks of aging in a cell-type-specific manner. Brain endothelial cells were found to be especially malleable to this intervention, exhibiting dynamic transcriptional changes that affect vascular structure and function. These findings suggest new strategies for slowing deterioration and driving regeneration in the aging brain through approaches that do not rely on disease-specific mechanisms or actions of individual circulating factors.
    MeSH term(s) Animals ; Mice ; Transcriptome/genetics ; Endothelial Cells ; Aging/genetics ; Parabiosis ; Brain
    Language English
    Publishing date 2023-03-09
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't
    ISSN 2662-8465
    ISSN (online) 2662-8465
    DOI 10.1038/s43587-023-00373-6
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Gasdermin-E mediates mitochondrial damage in axons and neurodegeneration.

    Neel, Dylan V / Basu, Himanish / Gunner, Georgia / Bergstresser, Matthew D / Giadone, Richard M / Chung, Haeji / Miao, Rui / Chou, Vicky / Brody, Eliza / Jiang, Xin / Lee, Edward / Watts, Michelle E / Marques, Christine / Held, Aaron / Wainger, Brian / Lagier-Tourenne, Clotilde / Zhang, Yong-Jie / Petrucelli, Leonard / Young-Pearse, Tracy L /
    Chen-Plotkin, Alice S / Rubin, Lee L / Lieberman, Judy / Chiu, Isaac M

    Neuron

    2023  Volume 111, Issue 8, Page(s) 1222–1240.e9

    Abstract: Mitochondrial dysfunction and axon loss are hallmarks of neurologic diseases. Gasdermin (GSDM) proteins are executioner pore-forming molecules that mediate cell death, yet their roles in the central nervous system (CNS) are not well understood. Here, we ... ...

    Abstract Mitochondrial dysfunction and axon loss are hallmarks of neurologic diseases. Gasdermin (GSDM) proteins are executioner pore-forming molecules that mediate cell death, yet their roles in the central nervous system (CNS) are not well understood. Here, we find that one GSDM family member, GSDME, is expressed by both mouse and human neurons. GSDME plays a role in mitochondrial damage and axon loss. Mitochondrial neurotoxins induced caspase-dependent GSDME cleavage and rapid localization to mitochondria in axons, where GSDME promoted mitochondrial depolarization, trafficking defects, and neurite retraction. Frontotemporal dementia (FTD)/amyotrophic lateral sclerosis (ALS)-associated proteins TDP-43 and PR-50 induced GSDME-mediated damage to mitochondria and neurite loss. GSDME knockdown protected against neurite loss in ALS patient iPSC-derived motor neurons. Knockout of GSDME in SOD1
    MeSH term(s) Mice ; Animals ; Humans ; Amyotrophic Lateral Sclerosis/metabolism ; Gasdermins ; Mice, Knockout ; Motor Neurons/metabolism ; Axons/metabolism
    Chemical Substances Gasdermins
    Language English
    Publishing date 2023-03-13
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't
    ZDB-ID 808167-0
    ISSN 1097-4199 ; 0896-6273
    ISSN (online) 1097-4199
    ISSN 0896-6273
    DOI 10.1016/j.neuron.2023.02.019
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: qRT-PCR Platforms for Diagnosing and Reporting SARS-CoV-2 Infection in Human Samples.

    Giadone, Richard M / Mithal, Aditya / Miller, Gregory J / Matte, Taylor M / Yeung, Anthony K / Dowrey, Todd W / Werder, Rhiannon B / Miller, Nancy S / Andry, Christopher D / Vanuytsel, Kim / Murphy, George J

    STAR protocols

    2020  Volume 1, Issue 2, Page(s) 100102

    Abstract: The protocols herein outline the use of qRT-PCR to detect the presence of SARS-CoV-2 genomic RNA in patient samples. In order to cope with potential fluctuations in supply chain and testing demands and to enable expedient adaptation of reagents and ... ...

    Abstract The protocols herein outline the use of qRT-PCR to detect the presence of SARS-CoV-2 genomic RNA in patient samples. In order to cope with potential fluctuations in supply chain and testing demands and to enable expedient adaptation of reagents and assays on hand, we include details for three parallel methodologies (one- and two-step singleplex and one-step multiplex assays). The diagnostic platforms described can be easily adapted by basic science research laboratories for SARS-CoV-2 diagnostic testing with relatively short turnaround time. For complete details on the use and execution of this protocol, please refer to Vanuytsel et al. (2020).
    MeSH term(s) COVID-19/diagnosis ; COVID-19 Nucleic Acid Testing/methods ; Disease Notification/methods ; Humans ; Real-Time Polymerase Chain Reaction/methods ; SARS-CoV-2/genetics ; SARS-CoV-2/isolation & purification ; Software
    Keywords covid19
    Language English
    Publishing date 2020-09-15
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ISSN 2666-1667
    ISSN (online) 2666-1667
    DOI 10.1016/j.xpro.2020.100102
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: Rapid Implementation of a SARS-CoV-2 Diagnostic Quantitative Real-Time PCR Test with Emergency Use Authorization at a Large Academic Safety Net Hospital.

    Vanuytsel, Kim / Mithal, Aditya / Giadone, Richard M / Yeung, Anthony K / Matte, Taylor M / Dowrey, Todd W / Werder, Rhiannon B / Miller, Gregory J / Miller, Nancy S / Andry, Christopher D / Murphy, George J

    Med (New York, N.Y.)

    2020  Volume 1, Issue 1, Page(s) 152–157.e3

    Abstract: Background: Significant delays in the rapid development and distribution of diagnostic testing for SARS-CoV-2 (COVID-19) infection have prevented adequate public health management of the disease, impacting the timely mapping of viral spread and the ... ...

    Abstract Background: Significant delays in the rapid development and distribution of diagnostic testing for SARS-CoV-2 (COVID-19) infection have prevented adequate public health management of the disease, impacting the timely mapping of viral spread and the conservation of personal protective equipment. Furthermore, vulnerable populations, such as those served by the Boston Medical Center (BMC), the largest safety net hospital in New England, represent a high-risk group across multiple dimensions, including a higher prevalence of pre-existing conditions and substance use disorders, lower health maintenance, unstable housing, and a propensity for rapid community spread, highlighting the urgent need for expedient and reliable in-house testing.
    Methods: We developed a SARS-CoV-2 diagnostic medium-throughput qRT-PCR assay with rapid turnaround time and utilized this Clinical Laboratory Improvement Amendments (CLIA)-certified assay for testing nasopharyngeal swab samples from BMC patients, with emergency authorization from the Food and Drug Administration (FDA) and the Massachusetts Department of Public Health.
    Findings: The in-house testing platform displayed robust accuracy and reliability in validation studies and reduced institutional sample turnaround time from 5-7 days to less than 24 h. Of over 1,000 unique patient samples tested, 44.1% were positive for SARS-CoV-2 infection.
    Conclusions: This work provides a blueprint for academic centers and community hospitals lacking automated laboratory machinery to implement rapid in-house testing.
    Funding: This study was supported by funding from the Boston University School of Medicine, the National Institutes of Health, Boston Medical Center, and the Massachusetts Consortium on Pathogen Readiness (MASS CPR).
    MeSH term(s) COVID-19/diagnosis ; Humans ; Real-Time Polymerase Chain Reaction ; Reproducibility of Results ; SARS-CoV-2/genetics ; Safety-net Providers ; Sensitivity and Specificity
    Keywords covid19
    Language English
    Publishing date 2020-05-19
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Extramural
    ISSN 2666-6340
    ISSN (online) 2666-6340
    DOI 10.1016/j.medj.2020.05.001
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