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Song SS, Druschel LN, Conard JH, Wang JJ, Kasthuri NM, Ricky Chan E, Capadona JR. Depletion of complement factor 3 delays the neuroinflammatory response to intracortical microelectrodes. Brain Behav Immun 2024; 118:221-235. [PMID: 38458498 DOI: 10.1016/j.bbi.2024.03.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/22/2023] [Revised: 01/26/2024] [Accepted: 03/02/2024] [Indexed: 03/10/2024] Open
Abstract
The neuroinflammatory response to intracortical microelectrodes (IMEs) used with brain-machine interfacing (BMI) applications is regarded as the primary contributor to poor chronic performance. Recent developments in high-plex gene expression technologies have allowed for an evolution in the investigation of individual proteins or genes to be able to identify specific pathways of upregulated genes that may contribute to the neuroinflammatory response. Several key pathways that are upregulated following IME implantation are involved with the complement system. The complement system is part of the innate immune system involved in recognizing and eliminating pathogens - a significant contributor to the foreign body response against biomaterials. Specifically, we have identified Complement 3 (C3) as a gene of interest because it is the intersection of several key complement pathways. In this study, we investigated the role of C3 in the IME inflammatory response by comparing the neuroinflammatory gene expression at the microelectrode implant site between C3 knockout (C3-/-) and wild-type (WT) mice. We have found that, like in WT mice, implantation of intracortical microelectrodes in C3-/- mice yields a dramatic increase in the neuroinflammatory gene expression at all post-surgery time points investigated. However, compared to WT mice, C3 depletion showed reduced expression of many neuroinflammatory genes pre-surgery and 4 weeks post-surgery. Conversely, depletion of C3 increased the expression of many neuroinflammatory genes at 8 weeks and 16 weeks post-surgery, compared to WT mice. Our results suggest that C3 depletion may be a promising therapeutic target for acute, but not chronic, relief of the neuroinflammatory response to IME implantation. Additional compensatory targets may also be required for comprehensive long-term reduction of the neuroinflammatory response for improved intracortical microelectrode performance.
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Affiliation(s)
- Sydney S Song
- Department of Biomedical Engineering, Case Western Reserve University, Cleveland, OH 44106, United States; Advanced Platform Technology Center, Louis Stokes Cleveland Veterans Affairs Medical Center, Cleveland, OH 44106, United States.
| | - Lindsey N Druschel
- Department of Biomedical Engineering, Case Western Reserve University, Cleveland, OH 44106, United States; Advanced Platform Technology Center, Louis Stokes Cleveland Veterans Affairs Medical Center, Cleveland, OH 44106, United States.
| | - Jacob H Conard
- Department of Biomedical Engineering, Case Western Reserve University, Cleveland, OH 44106, United States.
| | - Jaime J Wang
- Department of Biomedical Engineering, Case Western Reserve University, Cleveland, OH 44106, United States; Advanced Platform Technology Center, Louis Stokes Cleveland Veterans Affairs Medical Center, Cleveland, OH 44106, United States.
| | - Niveda M Kasthuri
- Department of Biomedical Engineering, Case Western Reserve University, Cleveland, OH 44106, United States; Advanced Platform Technology Center, Louis Stokes Cleveland Veterans Affairs Medical Center, Cleveland, OH 44106, United States.
| | - E Ricky Chan
- Cleveland Institute for Computational Biology, Case Western Reserve University, Cleveland, OH 44106, United States.
| | - Jeffrey R Capadona
- Department of Biomedical Engineering, Case Western Reserve University, Cleveland, OH 44106, United States; Advanced Platform Technology Center, Louis Stokes Cleveland Veterans Affairs Medical Center, Cleveland, OH 44106, United States.
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Rana N, Privitera G, Kondolf HC, Bulek K, Lechuga S, De Salvo C, Corridoni D, Antanaviciute A, Maywald RL, Hurtado AM, Zhao J, Huang EH, Li X, Chan ER, Simmons A, Bamias G, Abbott DW, Heaney JD, Ivanov AI, Pizarro TT. GSDMB is increased in IBD and regulates epithelial restitution/repair independent of pyroptosis. Cell 2024; 187:1011-1015. [PMID: 38364781 DOI: 10.1016/j.cell.2024.01.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/18/2024]
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Song S, Druschel LN, Chan ER, Capadona JR. Differential expression of genes involved in the chronic response to intracortical microelectrodes. Acta Biomater 2023; 169:348-362. [PMID: 37507031 PMCID: PMC10528922 DOI: 10.1016/j.actbio.2023.07.038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2023] [Revised: 07/13/2023] [Accepted: 07/23/2023] [Indexed: 07/30/2023]
Abstract
Brain-Machine Interface systems (BMIs) are clinically valuable devices that can provide functional restoration for patients with spinal cord injury or improved integration for patients requiring prostheses. Intracortical microelectrodes can record neuronal action potentials at a resolution necessary for precisely controlling BMIs. However, intracortical microelectrodes have a demonstrated history of progressive decline in the recording performance with time, inhibiting their usefulness. One major contributor to decreased performance is the neuroinflammatory response to the implanted microelectrodes. The neuroinflammatory response can lead to neurodegeneration and the formation of a glial scar at the implant site. Historically, histological imaging of relatively few known cellular and protein markers has characterized the neuroinflammatory response to implanted microelectrode arrays. However, neuroinflammation requires many molecular players to coordinate the response - meaning traditional methods could result in an incomplete understanding. Taking advantage of recent advancements in tools to characterize the relative or absolute DNA/RNA expression levels, a few groups have begun to explore gene expression at the microelectrode-tissue interface. We have utilized a custom panel of ∼813 neuroinflammatory-specific genes developed with NanoString for bulk tissue analysis at the microelectrode-tissue interface. Our previous studies characterized the acute innate immune response to intracortical microelectrodes. Here we investigated the gene expression at the microelectrode-tissue interface in wild-type (WT) mice chronically implanted with nonfunctioning probes. We found 28 differentially expressed genes at chronic time points (4WK, 8WK, and 16WK), many in the complement and extracellular matrix system. Further, the expression levels were relatively stable over time. Genes identified here represent chronic molecular players at the microelectrode implant sites and potential therapeutic targets for the long-term integration of microelectrodes. STATEMENT OF SIGNIFICANCE: Intracortical microelectrodes can record neuronal action potentials at a resolution necessary for the precise control of Brain-Machine Interface systems (BMIs). However, intracortical microelectrodes have a demonstrated history of progressive declines in the recording performance with time, inhibiting their usefulness. One major contributor to the decline in these devices is the neuroinflammatory response against the implanted microelectrodes. Historically, neuroinflammation to implanted microelectrode arrays has been characterized by histological imaging of relatively few known cellular and protein markers. Few studies have begun to develop a more in-depth understanding of the molecular pathways facilitating device-mediated neuroinflammation. Here, we are among the first to identify genetic pathways that could represent targets to improve the host response to intracortical microelectrodes, and ultimately device performance.
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Affiliation(s)
- Sydney Song
- Department of Biomedical Engineering, Case Western Reserve University, Cleveland, OH 44106, United States; Advanced Platform Technology Center, Louis Stokes Cleveland Veterans Affairs Medical Center, Cleveland, OH 44106, United States
| | - Lindsey N Druschel
- Department of Biomedical Engineering, Case Western Reserve University, Cleveland, OH 44106, United States; Advanced Platform Technology Center, Louis Stokes Cleveland Veterans Affairs Medical Center, Cleveland, OH 44106, United States
| | - E Ricky Chan
- Cleveland Institute for Computational Biology, Case Western Reserve University, Cleveland, OH 44106, United States
| | - Jeffrey R Capadona
- Department of Biomedical Engineering, Case Western Reserve University, Cleveland, OH 44106, United States; Advanced Platform Technology Center, Louis Stokes Cleveland Veterans Affairs Medical Center, Cleveland, OH 44106, United States.
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Polak KL, Tamagno I, Parameswaran N, Smigiel J, Chan ER, Yuan X, Rios B, Jackson MW. Oncostatin-M and OSM-Receptor Feed-Forward Activation of MAPK Induces Separable Stem-like and Mesenchymal Programs. Mol Cancer Res 2023; 21:975-990. [PMID: 37310811 PMCID: PMC10527478 DOI: 10.1158/1541-7786.mcr-22-0715] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2022] [Revised: 04/19/2023] [Accepted: 06/08/2023] [Indexed: 06/15/2023]
Abstract
Patients diagnosed with pancreatic ductal adenocarcinoma (PDAC) frequently present with advanced metastatic disease and exhibit a poor response to therapy, resulting in poor outcomes. The tumor microenvironment cytokine Oncostatin-M (OSM) initiates PDAC plasticity, inducing the reprogramming to a stem-like/mesenchymal state, which enhances metastasis and therapy resistance. Using a panel of PDAC cells driven through epithelial-mesenchymal transition (EMT) by OSM or the transcription factors ZEB1 or SNAI1, we find that OSM uniquely induces tumor initiation and gemcitabine resistance independently of its ability to induce a CD44HI/mesenchymal phenotype. In contrast, while ZEB1 and SNAI1 induce a CD44HI/mesenchymal phenotype and migration comparable with OSM, they are unable to promote tumor initiation or robust gemcitabine resistance. Transcriptomic analysis identified that OSM-mediated stemness requires MAPK activation and sustained, feed-forward transcription of OSMR. MEK and ERK inhibitors prevented OSM-driven transcription of select target genes and stem-like/mesenchymal reprogramming, resulting in reduced tumor growth and resensitization to gemcitabine. We propose that the unique properties of OSMR, which hyperactivates MAPK signaling when compared with other IL6 family receptors, make it an attractive therapeutic target, and that disrupting the OSM-OSMR-MAPK feed-forward loop may be a novel way to therapeutically target the stem-like behaviors common to aggressive PDAC. IMPLICATIONS Small-molecule MAPK inhibitors may effectively target the OSM/OSMR-axis that leads to EMT and tumor initiating properties that promote aggressive PDAC.
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Affiliation(s)
- Kelsey L Polak
- Department of Pathology and Case Comprehensive Cancer Center, Case Western Reserve University Cleveland, OH, USA
| | - Ilaria Tamagno
- Department of Pathology and Case Comprehensive Cancer Center, Case Western Reserve University Cleveland, OH, USA
| | - Neetha Parameswaran
- Department of Pathology and Case Comprehensive Cancer Center, Case Western Reserve University Cleveland, OH, USA
| | - Jacob Smigiel
- Broad Institute of MIT and Harvard, Cambridge, Massachusetts, USA
| | - E. Ricky Chan
- Department of Pathology and Case Comprehensive Cancer Center, Case Western Reserve University Cleveland, OH, USA
- Department of Population and Quantitative Health Sciences, Case Western Reserve University, Cleveland, OH, USA
| | - Xueer Yuan
- Department of Pathology and Case Comprehensive Cancer Center, Case Western Reserve University Cleveland, OH, USA
| | - Brenda Rios
- Cancer Biology Program, Vanderbilt School of Medicine, Nashville, Tennessee, USA
| | - Mark W. Jackson
- Department of Pathology and Case Comprehensive Cancer Center, Case Western Reserve University Cleveland, OH, USA
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Zafar A, Ng HP, Chan ER, Dunwoodie SL, Mahabeleshwar GH. Myeloid-CITED2 Deficiency Exacerbates Diet-Induced Obesity and Pro-Inflammatory Macrophage Response. Cells 2023; 12:2136. [PMID: 37681868 PMCID: PMC10486650 DOI: 10.3390/cells12172136] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2023] [Revised: 07/27/2023] [Accepted: 07/27/2023] [Indexed: 09/09/2023] Open
Abstract
Macrophages are the principal component of the innate immune system that are found in all tissues and play an essential role in development, homeostasis, tissue repair, and immunity. Clinical and experimental studies have shown that transcriptionally dynamic pro-inflammatory macrophages are involved in the pathogenesis of diet-induced obesity and insulin resistance. However, cell-intrinsic mechanisms must exist that bridle uncontrolled pro-inflammatory macrophage activation in metabolic organs and disease pathogenesis. In this study, we show that CBP/p300-interacting transactivator with glutamic acid/aspartic acid-rich carboxyl-terminal domain 2 (CITED2) is an essential negative regulator of pro-inflammatory macrophage activation and inflammatory disease pathogenesis. Our in vivo studies show that myeloid-CITED2 deficiency significantly elevates high-fat diet (HFD)-induced expansion of adipose tissue volume, obesity, glucose intolerance, and insulin resistance. Moreover, myeloid-CITED2 deficiency also substantially augments HFD-induced adipose tissue inflammation and adverse remodeling of adipocytes. Our integrated transcriptomics and gene set enrichment analyses show that CITED2 deficiency curtails BCL6 signaling and broadly elevates BCL6-repressive gene target expression in macrophages. Using complementary gain- and loss-of-function studies, we found that CITED2 deficiency attenuates, and CITED2 overexpression elevates, inducible BCL6 expression in macrophages. At the molecular level, our analyses show that CITED2 promotes BCL6 expression by restraining STAT5 activation in macrophages. Interestingly, siRNA-mediated knockdown of STAT5 fully reversed elevated pro-inflammatory gene target expression in CITED2-deficient macrophages. Overall, our findings highlight that CITED2 restrains inflammation by promoting BCL6 expression in macrophages, and limits diet-induced obesity and insulin resistance.
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Affiliation(s)
- Atif Zafar
- Department of Pathology, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA
| | - Hang Pong Ng
- Department of Pathology, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA
| | - E. Ricky Chan
- Cleveland Institute for Computational Biology, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA
| | - Sally L. Dunwoodie
- Victor Chang Cardiac Research Institute, Sydney, NSW 2010, Australia
- School of Clinical Medicine, Faculty of Medicine and Health, UNSW, Sydney, NSW 2052, Australia
| | - Ganapati H. Mahabeleshwar
- Department of Pathology, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA
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Wang M, Osborn LJ, Jain S, Meng X, Weakley A, Yan J, Massey WJ, Varadharajan V, Horak A, Banerjee R, Allende DS, Chan ER, Hajjar AM, Wang Z, Dimas A, Zhao A, Nagashima K, Cheng AG, Higginbottom S, Hazen SL, Brown JM, Fischbach MA. Strain dropouts reveal interactions that govern the metabolic output of the gut microbiome. Cell 2023; 186:2839-2852.e21. [PMID: 37352836 PMCID: PMC10299816 DOI: 10.1016/j.cell.2023.05.037] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Revised: 04/10/2023] [Accepted: 05/26/2023] [Indexed: 06/25/2023]
Abstract
The gut microbiome is complex, raising questions about the role of individual strains in the community. Here, we address this question by constructing variants of a complex defined community in which we eliminate strains that occupy the bile acid 7α-dehydroxylation niche. Omitting Clostridium scindens (Cs) and Clostridium hylemonae (Ch) eliminates secondary bile acid production and reshapes the community in a highly specific manner: eight strains change in relative abundance by >100-fold. In single-strain dropout communities, Cs and Ch reach the same relative abundance and dehydroxylate bile acids to a similar extent. However, Clostridium sporogenes increases >1,000-fold in the ΔCs but not ΔCh dropout, reshaping the pool of microbiome-derived phenylalanine metabolites. Thus, strains that are functionally redundant within a niche can have widely varying impacts outside the niche, and a strain swap can ripple through the community in an unpredictable manner, resulting in a large impact on an unrelated community-level phenotype.
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Affiliation(s)
- Min Wang
- Department of Bioengineering, Stanford University, Stanford, CA 94305, USA; Department of Microbiology and Immunology, Stanford University School of Medicine, Stanford University, Stanford, CA 94305, USA; ChEM-H Institute, Stanford University, Stanford, CA 94305, USA
| | - Lucas J Osborn
- Department of Cardiovascular and Metabolic Sciences, Lerner Research Institute Cleveland Clinic, Cleveland, OH 44195, USA; Center for Microbiome and Human Health, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, USA
| | - Sunit Jain
- ChEM-H Institute, Stanford University, Stanford, CA 94305, USA; Chan Zuckerberg Biohub, San Francisco, CA 94158, USA
| | - Xiandong Meng
- Department of Bioengineering, Stanford University, Stanford, CA 94305, USA; Department of Microbiology and Immunology, Stanford University School of Medicine, Stanford University, Stanford, CA 94305, USA; ChEM-H Institute, Stanford University, Stanford, CA 94305, USA
| | - Allison Weakley
- ChEM-H Institute, Stanford University, Stanford, CA 94305, USA; Chan Zuckerberg Biohub, San Francisco, CA 94158, USA
| | - Jia Yan
- Chan Zuckerberg Biohub, San Francisco, CA 94158, USA
| | - William J Massey
- Department of Cardiovascular and Metabolic Sciences, Lerner Research Institute Cleveland Clinic, Cleveland, OH 44195, USA; Center for Microbiome and Human Health, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, USA
| | - Venkateshwari Varadharajan
- Department of Cardiovascular and Metabolic Sciences, Lerner Research Institute Cleveland Clinic, Cleveland, OH 44195, USA; Center for Microbiome and Human Health, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, USA
| | - Anthony Horak
- Department of Cardiovascular and Metabolic Sciences, Lerner Research Institute Cleveland Clinic, Cleveland, OH 44195, USA; Center for Microbiome and Human Health, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, USA
| | - Rakhee Banerjee
- Department of Cardiovascular and Metabolic Sciences, Lerner Research Institute Cleveland Clinic, Cleveland, OH 44195, USA; Center for Microbiome and Human Health, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, USA
| | - Daniela S Allende
- Department of Anatomical Pathology, Cleveland Clinic, Cleveland, OH 44195, USA
| | - E Ricky Chan
- Institute for Computational Biology, Case Western Reserve University, Cleveland, OH 44106, USA
| | - Adeline M Hajjar
- Department of Cardiovascular and Metabolic Sciences, Lerner Research Institute Cleveland Clinic, Cleveland, OH 44195, USA; Center for Microbiome and Human Health, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, USA
| | - Zeneng Wang
- Department of Cardiovascular and Metabolic Sciences, Lerner Research Institute Cleveland Clinic, Cleveland, OH 44195, USA; Center for Microbiome and Human Health, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, USA
| | - Alejandra Dimas
- Department of Bioengineering, Stanford University, Stanford, CA 94305, USA; Department of Microbiology and Immunology, Stanford University School of Medicine, Stanford University, Stanford, CA 94305, USA; ChEM-H Institute, Stanford University, Stanford, CA 94305, USA
| | - Aishan Zhao
- Department of Bioengineering, Stanford University, Stanford, CA 94305, USA; Department of Microbiology and Immunology, Stanford University School of Medicine, Stanford University, Stanford, CA 94305, USA; ChEM-H Institute, Stanford University, Stanford, CA 94305, USA
| | - Kazuki Nagashima
- Department of Bioengineering, Stanford University, Stanford, CA 94305, USA; Department of Microbiology and Immunology, Stanford University School of Medicine, Stanford University, Stanford, CA 94305, USA; ChEM-H Institute, Stanford University, Stanford, CA 94305, USA
| | - Alice G Cheng
- Department of Bioengineering, Stanford University, Stanford, CA 94305, USA; Department of Microbiology and Immunology, Stanford University School of Medicine, Stanford University, Stanford, CA 94305, USA; ChEM-H Institute, Stanford University, Stanford, CA 94305, USA
| | - Steven Higginbottom
- Department of Microbiology and Immunology, Stanford University School of Medicine, Stanford University, Stanford, CA 94305, USA; ChEM-H Institute, Stanford University, Stanford, CA 94305, USA
| | - Stanley L Hazen
- Department of Cardiovascular and Metabolic Sciences, Lerner Research Institute Cleveland Clinic, Cleveland, OH 44195, USA; Center for Microbiome and Human Health, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, USA
| | - J Mark Brown
- Department of Cardiovascular and Metabolic Sciences, Lerner Research Institute Cleveland Clinic, Cleveland, OH 44195, USA; Center for Microbiome and Human Health, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, USA
| | - Michael A Fischbach
- Department of Bioengineering, Stanford University, Stanford, CA 94305, USA; Department of Microbiology and Immunology, Stanford University School of Medicine, Stanford University, Stanford, CA 94305, USA; ChEM-H Institute, Stanford University, Stanford, CA 94305, USA; Chan Zuckerberg Biohub, San Francisco, CA 94158, USA.
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Massey WJ, Varadharajan V, Banerjee R, Brown AL, Horak AJ, Hohe RC, Jung BM, Qiu Y, Chan ER, Pan C, Zhang R, Allende DS, Willard B, Cheng F, Lusis AJ, Brown JM. MBOAT7-driven lysophosphatidylinositol acylation in adipocytes contributes to systemic glucose homeostasis. J Lipid Res 2023; 64:100349. [PMID: 36806709 PMCID: PMC10041558 DOI: 10.1016/j.jlr.2023.100349] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2022] [Revised: 02/08/2023] [Accepted: 02/11/2023] [Indexed: 02/21/2023] Open
Abstract
We previously demonstrated that antisense oligonucleotide-mediated knockdown of Mboat7, the gene encoding membrane bound O-acyltransferase 7, in the liver and adipose tissue of mice promoted high fat diet-induced hepatic steatosis, hyperinsulinemia, and systemic insulin resistance. Thereafter, other groups showed that hepatocyte-specific genetic deletion of Mboat7 promoted striking fatty liver and NAFLD progression in mice but does not alter insulin sensitivity, suggesting the potential for cell autonomous roles. Here, we show that MBOAT7 function in adipocytes contributes to diet-induced metabolic disturbances including hyperinsulinemia and systemic insulin resistance. We generated Mboat7 floxed mice and created hepatocyte- and adipocyte-specific Mboat7 knockout mice using Cre-recombinase mice under the control of the albumin and adiponectin promoter, respectively. Here, we show that MBOAT7 function in adipocytes contributes to diet-induced metabolic disturbances including hyperinsulinemia and systemic insulin resistance. The expression of Mboat7 in white adipose tissue closely correlates with diet-induced obesity across a panel of ∼100 inbred strains of mice fed a high fat/high sucrose diet. Moreover, we found that adipocyte-specific genetic deletion of Mboat7 is sufficient to promote hyperinsulinemia, systemic insulin resistance, and mild fatty liver. Unlike in the liver, where Mboat7 plays a relatively minor role in maintaining arachidonic acid-containing PI pools, Mboat7 is the major source of arachidonic acid-containing PI pools in adipose tissue. Our data demonstrate that MBOAT7 is a critical regulator of adipose tissue PI homeostasis, and adipocyte MBOAT7-driven PI biosynthesis is closely linked to hyperinsulinemia and insulin resistance in mice.
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Affiliation(s)
- William J Massey
- Department of Cardiovascular and Metabolic Sciences, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, USA; Center for Microbiome and Human Health, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, USA
| | - Venkateshwari Varadharajan
- Department of Cardiovascular and Metabolic Sciences, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, USA; Center for Microbiome and Human Health, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, USA
| | - Rakhee Banerjee
- Department of Cardiovascular and Metabolic Sciences, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, USA; Center for Microbiome and Human Health, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, USA
| | - Amanda L Brown
- Department of Cardiovascular and Metabolic Sciences, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, USA; Center for Microbiome and Human Health, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, USA
| | - Anthony J Horak
- Department of Cardiovascular and Metabolic Sciences, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, USA; Center for Microbiome and Human Health, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, USA
| | - Rachel C Hohe
- Department of Cardiovascular and Metabolic Sciences, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, USA; Center for Microbiome and Human Health, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, USA
| | - Bryan M Jung
- Department of Cardiovascular and Metabolic Sciences, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, USA; Center for Microbiome and Human Health, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, USA
| | - Yunguang Qiu
- Genomic Medicine Institute, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, USA
| | - E Ricky Chan
- Institute for Computational Biology, Case Western Reserve University, Cleveland, OH, USA
| | - Calvin Pan
- Departments of Medicine, Microbiology, and Human Genetics, University of California Los Angeles, Los Angeles, CA, USA
| | - Renliang Zhang
- Proteomics and Metabolomics Core, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, USA
| | - Daniela S Allende
- Department of Anatomical Pathology, Cleveland Clinic, Cleveland, OH, USA
| | - Belinda Willard
- Proteomics and Metabolomics Core, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, USA
| | - Feixiong Cheng
- Genomic Medicine Institute, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, USA
| | - Aldons J Lusis
- Departments of Medicine, Microbiology, and Human Genetics, University of California Los Angeles, Los Angeles, CA, USA
| | - J Mark Brown
- Department of Cardiovascular and Metabolic Sciences, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, USA; Center for Microbiome and Human Health, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, USA.
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Sergeeva O, Zhang Y, Gao S, Chan ER, Sergeev M, Iyer R, Sexton S, Avril N, Lu ZR, Lee Z. PET Imaging of Hepatocellular Carcinoma Using ZD2-( 68Ga-NOTA). J Hepatocell Carcinoma 2023; 10:291-301. [PMID: 36860804 PMCID: PMC9968869 DOI: 10.2147/jhc.s390939] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2022] [Accepted: 02/14/2023] [Indexed: 02/24/2023] Open
Abstract
Purpose We tested a recently developed short peptide radioligand for PET imaging of hepatocellular carcinoma (HCC) by targeting an oncoprotein, extra-domain B fibronectin (EDB-FN) in the tumor microenvironment. Methods The radioligand consists of a small linear peptide ZD2 with 68Ga-NOTA chelator, and specifically binds to EDB-FN. PET images were acquired dynamically for 1 hour after intravenously (i.v.) injecting 37 MBq (1.0 mCi) of the radioligand into the woodchuck model of naturally occurring HCC. Woodchuck HCC originated from chronic viral hepatitis infection, which recapitulates the corresponding human primary liver cancer. The animals were euthanized post-imaging for tissue collection and validation. Results For ZD2 avid liver tumors, the radioligand accumulation plateaued a few minutes after injection, while the liver background uptake stabilized 20 min post-injection. The status of EDB-FN in woodchuck HCC was confirmed by histology and validated by PCR and western blocking. Conclusion We have showed the viability of using the ZD2 short peptide radioligand targeting EDB-FN in liver tumor tissue for PET imaging of HCC, which can potentially impact the clinical care for HCC patients.
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Affiliation(s)
- Olga Sergeeva
- Department of Radiology, Case Western Reserve University, Cleveland, OH, USA
| | - Yifan Zhang
- Department of Radiology, Case Western Reserve University, Cleveland, OH, USA
| | - Songqi Gao
- Department of Biomedical Engineering, Case Western Reserve University, Cleveland, OH, USA
| | - E Ricky Chan
- Cleveland Institute for Computational Biology, Case Western Reserve University, Cleveland, OH, USA
| | - Maxim Sergeev
- Department of Radiology, University Hospitals Cleveland Medical Center, Cleveland, OH, USA
| | - Renuka Iyer
- Medical Oncology and Laboratory Animal Shared Resources, Roswell Park Cancer Institute, Buffalo, NY, USA
| | - Sandra Sexton
- Medical Oncology and Laboratory Animal Shared Resources, Roswell Park Cancer Institute, Buffalo, NY, USA
| | - Norbert Avril
- Department of Radiology, University Hospitals Cleveland Medical Center, Cleveland, OH, USA
| | - Zheng-Rong Lu
- Department of Biomedical Engineering, Case Western Reserve University, Cleveland, OH, USA
| | - Zhenghong Lee
- Department of Radiology, Case Western Reserve University, Cleveland, OH, USA
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Song S, Regan B, Ereifej ES, Chan ER, Capadona JR. Neuroinflammatory Gene Expression Analysis Reveals Pathways of Interest as Potential Targets to Improve the Recording Performance of Intracortical Microelectrodes. Cells 2022; 11:2348. [PMID: 35954192 PMCID: PMC9367362 DOI: 10.3390/cells11152348] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2022] [Revised: 07/22/2022] [Accepted: 07/26/2022] [Indexed: 02/04/2023] Open
Abstract
Intracortical microelectrodes are a critical component of brain-machine interface (BMI) systems. The recording performance of intracortical microelectrodes used for both basic neuroscience research and clinical applications of BMIs decreases over time, limiting the utility of the devices. The neuroinflammatory response to the microelectrode has been identified as a significant contributing factor to its performance. Traditionally, pathological assessment has been limited to a dozen or so known neuroinflammatory proteins, and only a few groups have begun to explore changes in gene expression following microelectrode implantation. Our initial characterization of gene expression profiles of the neuroinflammatory response to mice implanted with non-functional intracortical probes revealed many upregulated genes that could inform future therapeutic targets. Emphasis was placed on the most significant gene expression changes and genes involved in multiple innate immune sets, including Cd14, C3, Itgam, and Irak4. In previous studies, inhibition of Cluster of Differentiation 14 (Cd14) improved microelectrode performance for up to two weeks after electrode implantation, suggesting CD14 can be explored as a potential therapeutic target. However, all measures of improvements in signal quality and electrode performance lost statistical significance after two weeks. Therefore, the current study investigated the expression of genes in the neuroinflammatory pathway at the tissue-microelectrode interface in Cd14-/- mice to understand better how Cd14 inhibition was connected to temporary improvements in recording quality over the initial 2-weeks post-surgery, allowing for the identification of potential co-therapeutic targets that may work synergistically with or after CD14 inhibition to improve microelectrode performance.
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Affiliation(s)
- Sydney Song
- Department of Biomedical Engineering, Case Western Reserve University, 2071 Martin Luther King Jr. Drive, Cleveland, OH 44106, USA; (S.S.); (E.S.E.)
- Advanced Platform Technology Center, Louis Stokes Cleveland Veterans Affairs Medical Center, Cleveland, OH 44106, USA
| | - Brianna Regan
- Veteran Affairs Ann Arbor Healthcare System, Ann Arbor, MI 48105, USA;
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI 48109, USA
| | - Evon S. Ereifej
- Department of Biomedical Engineering, Case Western Reserve University, 2071 Martin Luther King Jr. Drive, Cleveland, OH 44106, USA; (S.S.); (E.S.E.)
- Advanced Platform Technology Center, Louis Stokes Cleveland Veterans Affairs Medical Center, Cleveland, OH 44106, USA
- Veteran Affairs Ann Arbor Healthcare System, Ann Arbor, MI 48105, USA;
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI 48109, USA
- Department of Neurology, University of Michigan, Ann Arbor, MI 48109, USA
| | - E. Ricky Chan
- Institute for Computational Biology, Case Western Reserve University, Cleveland, OH 44106, USA;
| | - Jeffrey R. Capadona
- Department of Biomedical Engineering, Case Western Reserve University, 2071 Martin Luther King Jr. Drive, Cleveland, OH 44106, USA; (S.S.); (E.S.E.)
- Advanced Platform Technology Center, Louis Stokes Cleveland Veterans Affairs Medical Center, Cleveland, OH 44106, USA
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10
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Chan ER, Mehlotra RK, Pirani KA, Ratsimbasoa AC, Williams SM, Gaedigk A, Zimmerman PA. CYP2D6 gene resequencing in the Malagasy, a population at the crossroads between Asia and Africa: a pilot study. Pharmacogenomics 2022; 23:315-325. [PMID: 35230160 PMCID: PMC8965795 DOI: 10.2217/pgs-2021-0146] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Background: Plasmodium vivax malaria is endemic in Madagascar, where populations have genetic inheritance from Southeast Asia and East Africa. Primaquine, a drug of choice for vivax malaria, is metabolized principally via CYP2D6. CYP2D6 variation was characterized by locus-specific gene sequencing and was compared with TaqMan™ genotype data. Materials & methods: Long-range PCR amplicons were generated from 96 Malagasy samples and subjected to next-generation sequencing. Results: The authors observed high concordance between TaqMan™-based CYP2D6 genotype calls and the base calls from sequencing. In addition, there are new variants and haplotypes present in the Malagasy. Conclusion: Sequencing unique admixed populations provides more detailed and accurate insights regarding CYP2D6 variability, which may help optimize primaquine treatment across human genetic diversity.
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Affiliation(s)
- E Ricky Chan
- Cleveland Institute for Computational Biology, Case Western Reserve University, Cleveland, OH 44106, USA.,Population & Quantitative Health Sciences, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA
| | - Rajeev K Mehlotra
- Center for Global Health & Diseases, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA
| | - Karim A Pirani
- Division of Clinical Pharmacology, Toxicology & Therapeutic Innovation, Children's Mercy Kansas City, Kansas City, MO 64108, USA
| | - Arsene C Ratsimbasoa
- University of Fianarantsoa, Fianarantsoa, Madagascar.,CNARP (Centre National d'Application de Recherche Pharmaceutique), Antananarivo, Madagascar
| | - Scott M Williams
- Cleveland Institute for Computational Biology, Case Western Reserve University, Cleveland, OH 44106, USA.,Population & Quantitative Health Sciences, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA
| | - Andrea Gaedigk
- Division of Clinical Pharmacology, Toxicology & Therapeutic Innovation, Children's Mercy Kansas City, Kansas City, MO 64108, USA
| | - Peter A Zimmerman
- Center for Global Health & Diseases, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA
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11
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Rana N, Privitera G, Kondolf HC, Bulek K, Lechuga S, De Salvo C, Corridoni D, Antanaviciute A, Maywald RL, Hurtado AM, Zhao J, Huang EH, Li X, Chan ER, Simmons A, Bamias G, Abbott DW, Heaney JD, Ivanov AI, Pizarro TT. GSDMB is increased in IBD and regulates epithelial restitution/repair independent of pyroptosis. Cell 2022; 185:283-298.e17. [PMID: 35021065 PMCID: PMC8879997 DOI: 10.1016/j.cell.2021.12.024] [Citation(s) in RCA: 80] [Impact Index Per Article: 40.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Revised: 10/09/2021] [Accepted: 12/16/2021] [Indexed: 02/08/2023]
Abstract
Gasdermins are a family of structurally related proteins originally described for their role in pyroptosis. Gasdermin B (GSDMB) is currently the least studied, and while its association with genetic susceptibility to chronic mucosal inflammatory disorders is well established, little is known about its functional relevance during active disease states. Herein, we report increased GSDMB in inflammatory bowel disease, with single-cell analysis identifying epithelial specificity to inflamed colonocytes/crypt top colonocytes. Surprisingly, mechanistic experiments and transcriptome profiling reveal lack of inherent GSDMB-dependent pyroptosis in activated epithelial cells and organoids but instead point to increased proliferation and migration during in vitro wound closure, which arrests in GSDMB-deficient cells that display hyper-adhesiveness and enhanced formation of vinculin-based focal adhesions dependent on PDGF-A-mediated FAK phosphorylation. Importantly, carriage of disease-associated GSDMB SNPs confers functional defects, disrupting epithelial restitution/repair, which, altogether, establishes GSDMB as a critical factor for restoration of epithelial barrier function and the resolution of inflammation.
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Affiliation(s)
- Nitish Rana
- Department of Pathology, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA; Departments of Physiology & Biophysics, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA
| | - Giuseppe Privitera
- Department of Pathology, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA
| | - Hannah C Kondolf
- Department of Pathology, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA
| | - Katarzyna Bulek
- Department of Inflammation & Immunity, Learner Research Institute, Cleveland Clinic Foundation, Cleveland, OH 44195, USA
| | - Susana Lechuga
- Department of Inflammation & Immunity, Learner Research Institute, Cleveland Clinic Foundation, Cleveland, OH 44195, USA
| | - Carlo De Salvo
- Department of Pathology, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA
| | - Daniele Corridoni
- MRC Human Immunology Unit, MRC Weatherall Institute of Molecular Medicine, John Radcliffe Hospital, University of Oxford, Oxford, United Kingdom
| | - Agne Antanaviciute
- MRC Human Immunology Unit, MRC Weatherall Institute of Molecular Medicine, John Radcliffe Hospital, University of Oxford, Oxford, United Kingdom
| | - Rebecca L Maywald
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA
| | - Alexander M Hurtado
- Department of Pathology, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA
| | - Junjie Zhao
- Department of Inflammation & Immunity, Learner Research Institute, Cleveland Clinic Foundation, Cleveland, OH 44195, USA
| | - Emina H Huang
- Departments of Cancer Biology and Colon & Rectal Surgery, Learner Research Institute, Cleveland Clinic, Cleveland, OH 44195, USA
| | - Xiaoxia Li
- Department of Inflammation & Immunity, Learner Research Institute, Cleveland Clinic Foundation, Cleveland, OH 44195, USA
| | - E Ricky Chan
- Institute for Computational Biology, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA
| | - Alison Simmons
- MRC Human Immunology Unit, MRC Weatherall Institute of Molecular Medicine, John Radcliffe Hospital, University of Oxford, Oxford, United Kingdom
| | - Giorgos Bamias
- Academic Department of Gastroenterology, Ethnikon & Kapodistriakon University of Athens, Laikon Hospital, Athens, Greece
| | - Derek W Abbott
- Department of Pathology, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA
| | - Jason D Heaney
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA
| | - Andrei I Ivanov
- Department of Inflammation & Immunity, Learner Research Institute, Cleveland Clinic Foundation, Cleveland, OH 44195, USA
| | - Theresa T Pizarro
- Department of Pathology, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA.
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12
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Zafar A, Ng HP, Kim GD, Chan ER, Mahabeleshwar GH. BHLHE40 promotes macrophage pro-inflammatory gene expression and functions. FASEB J 2021; 35:e21940. [PMID: 34551158 DOI: 10.1096/fj.202100944r] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2021] [Revised: 08/23/2021] [Accepted: 09/07/2021] [Indexed: 12/15/2022]
Abstract
Macrophages are the principal innate immune cells that populate all major organs and provide the first line of cellular defense against infections and/or injuries. The immediate and early-responding macrophages must mount a robust pro-inflammatory response to protect the host by eliminating deleterious agents. The effective pro-inflammatory macrophage response requires the activation of complex transcriptional programs that modulate the dynamic regulation of inflammatory and metabolic gene expression. Therefore, transcription factors that govern pro-inflammatory and metabolic gene expression play an essential role in shaping the macrophage inflammatory response. Herein, we identify the basic helix-loop-helix family member e40 (BHLHE40), as a critical transcription factor that promotes broad pro-inflammatory and glycolytic gene expression by elevating HIF1α levels in macrophages. Our in vivo studies revealed that myeloid-BHLHE40 deficiency significantly attenuates macrophage and neutrophil recruitment to the site of inflammation. Our integrated transcriptomics and gene set enrichment analysis (GSEA) studies show that BHLHE40 deficiency broadly curtails inflammatory signaling pathways, hypoxia response, and glycolytic gene expression in macrophages. Utilizing complementary gain- and loss-of-function studies, our analyses uncovered that BHLHE40 promotes LPS-induced HIF1α mRNA and protein expression in macrophages. More importantly, forced overexpression of oxygen stable form of HIF1α completely reversed attenuated pro-inflammatory and glycolytic gene expression in BHLHE40-deficient macrophages. Collectively, these results demonstrate that BHLHE40 promotes macrophage pro-inflammatory gene expression and functions by elevating HIF1α expression in macrophages.
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Affiliation(s)
- Atif Zafar
- Department of Pathology, Case Western Reserve University School of Medicine, Cleveland, Ohio, USA
| | - Hang Pong Ng
- Department of Pathology, Case Western Reserve University School of Medicine, Cleveland, Ohio, USA
| | - Gun-Dong Kim
- Department of Pathology, Case Western Reserve University School of Medicine, Cleveland, Ohio, USA
| | - E Ricky Chan
- Cleveland Institute for Computational Biology, Case Western Reserve University School of Medicine, Cleveland, Ohio, USA
| | - Ganapati H Mahabeleshwar
- Department of Pathology, Case Western Reserve University School of Medicine, Cleveland, Ohio, USA
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13
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Benchek P, Igo RP, Voss-Hoynes H, Wren Y, Miller G, Truitt B, Zhang W, Osterman M, Freebairn L, Tag J, Taylor HG, Chan ER, Roussos P, Lewis B, Stein CM, Iyengar SK. Association between genes regulating neural pathways for quantitative traits of speech and language disorders. NPJ Genom Med 2021; 6:64. [PMID: 34315907 PMCID: PMC8316336 DOI: 10.1038/s41525-021-00225-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2021] [Accepted: 06/22/2021] [Indexed: 02/06/2023] Open
Abstract
Speech sound disorders (SSD) manifest as difficulties in phonological memory and awareness, oral motor function, language, vocabulary, reading, and spelling. Families enriched for SSD are rare, and typically display a cluster of deficits. We conducted a genome-wide association study (GWAS) in 435 children from 148 families in the Cleveland Family Speech and Reading study (CFSRS), examining 16 variables representing 6 domains. Replication was conducted using the Avon Longitudinal Study of Parents and Children (ALSPAC). We identified 18 significant loci (combined p < 10-8) that we pursued bioinformatically. We prioritized 5 novel gene regions with likely functional repercussions on neural pathways, including those which colocalized with differentially methylated regions in our sample. Polygenic risk scores for receptive language, expressive vocabulary, phonological awareness, phonological memory, spelling, and reading decoding associated with increasing clinical severity. In summary, neural-genetic influence on SSD is primarily multigenic and acts on genomic regulatory elements, similar to other neurodevelopmental disorders.
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Affiliation(s)
- Penelope Benchek
- Department of Population & Quantitative Health Sciences, Case Western Reserve University, Cleveland, OH, USA
| | - Robert P Igo
- Department of Population & Quantitative Health Sciences, Case Western Reserve University, Cleveland, OH, USA
| | - Heather Voss-Hoynes
- Department of Population & Quantitative Health Sciences, Case Western Reserve University, Cleveland, OH, USA
| | - Yvonne Wren
- Bristol Dental School, Faculty of Health Sciences, University of Bristol, and Bristol Speech and Language Therapy Research Unit, North Bristol NHS Trust, Bristol, UK
| | - Gabrielle Miller
- Department of Psychological Sciences, Case Western Reserve University, Cleveland, OH, USA
| | - Barbara Truitt
- Department of Population & Quantitative Health Sciences, Case Western Reserve University, Cleveland, OH, USA
| | - Wen Zhang
- Department of Psychiatry, Friedman Brain Institute, and Department of Genetics and Genomic Science and Institute for Multiscale Biology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Michael Osterman
- Department of Population & Quantitative Health Sciences, Case Western Reserve University, Cleveland, OH, USA
| | - Lisa Freebairn
- Department of Psychological Sciences, Case Western Reserve University, Cleveland, OH, USA
| | - Jessica Tag
- Department of Psychological Sciences, Case Western Reserve University, Cleveland, OH, USA
| | - H Gerry Taylor
- Department of Pediatrics, Case Western Reserve University, and Rainbow Babies & Children's Hospital, University Hospital Case Medical Center, Cleveland, OH, USA
- Nationwide Children's Hospital Research Institute and Department of Pediatrics, The Ohio State University, Columbus, OH, USA
| | - E Ricky Chan
- Department of Population & Quantitative Health Sciences, Case Western Reserve University, Cleveland, OH, USA
| | - Panos Roussos
- Department of Psychiatry, Friedman Brain Institute, and Department of Genetics and Genomic Science and Institute for Multiscale Biology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
- Mental Illness Research, Education, and Clinical Center (VISN 2 South), James J. Peters VA Medical Center, Bronx, NY, USA
| | - Barbara Lewis
- Department of Psychological Sciences, Case Western Reserve University, Cleveland, OH, USA
- Cleveland Hearing and Speech Center, Cleveland, OH, USA
| | - Catherine M Stein
- Department of Population & Quantitative Health Sciences, Case Western Reserve University, Cleveland, OH, USA.
| | - Sudha K Iyengar
- Department of Population & Quantitative Health Sciences, Case Western Reserve University, Cleveland, OH, USA.
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14
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Kim GD, Ng HP, Chan ER, Mahabeleshwar GH. Macrophage-Hypoxia-Inducible Factor-1α Signaling in Carotid Artery Stenosis. Am J Pathol 2021; 191:1118-1134. [PMID: 33753024 PMCID: PMC8176143 DOI: 10.1016/j.ajpath.2021.03.008] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2020] [Revised: 02/26/2021] [Accepted: 03/05/2021] [Indexed: 12/26/2022]
Abstract
Macrophages play crucial and diverse roles in the pathogenesis of inflammatory vascular diseases. Macrophages are the principal innate immune cells recruited to arterial walls to govern vascular homeostasis by modulating the proliferation of vascular smooth muscle cells, the reorganization of extracellular matrix components, the elimination of dead cells, and the restoration of normal blood flow. However, chronic sterile inflammation within the arterial walls draws inflammatory macrophages into intimal/neointimal regions that may contribute to disease pathogenesis. In this context, the accumulation and aberrant activation of macrophages in the neointimal regions govern the progression of inflammatory arterial wall diseases. Herein, we report that myeloid-hypoxia-inducible factor-1α (HIF1α) deficiency attenuates vascular smooth muscle cells and macrophage abundance in stenotic arteries and abrogates carotid neointima formation in vivo. The integrated transcriptomics, Gene Set Enrichment Analysis, metabolomics, and target gene evaluation showed that HIF1α represses oxidative phosphorylation, tricarboxylic acid cycle, fatty acid metabolism, and c-MYC signaling pathways while promoting inflammatory, glycolytic, hypoxia response gene expression in stenotic artery macrophages. At the molecular level, proinflammatory agents utilized STAT3 signaling pathways to elevate HIF1α expression in macrophages. Collectively, this study uncovers that macrophage-HIF1α deficiency restrains the pathogenesis of carotid artery stenosis by rewiring inflammatory and metabolic signaling pathways in macrophages.
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Affiliation(s)
- Gun-Dong Kim
- Department of Pathology, Case Western Reserve University, Cleveland, Ohio
| | - Hang Pong Ng
- Department of Pathology, Case Western Reserve University, Cleveland, Ohio
| | - E Ricky Chan
- Institute for Computational Biology, Case Western Reserve University, Cleveland, Ohio
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15
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Yu WY, Hill ST, Chan ER, Pink JJ, Cooper K, Leachman S, Lund AW, Kulkarni R, Bordeaux JS. Computational Drug Repositioning Identifies Statins as Modifiers of Prognostic Genetic Expression Signatures and Metastatic Behavior in Melanoma. J Invest Dermatol 2021; 141:1802-1809. [PMID: 33417917 DOI: 10.1016/j.jid.2020.12.015] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Revised: 12/02/2020] [Accepted: 12/15/2020] [Indexed: 12/20/2022]
Abstract
Despite advances in melanoma treatment, more than 70% of patients with distant metastasis die within 5 years. Proactive treatment of early melanoma to prevent metastasis could save lives and reduce overall healthcare costs. Currently, there are no treatments specifically designed to prevent early melanoma from progressing to metastasis. We used the Connectivity Map to conduct an in silico drug screen and identified 3-hydroxy-3-methylglutaryl-coenzyme A reductase inhibitors (statins) as a drug class that might prevent melanoma metastasis. To confirm the in vitro effect of statins, RNA sequencing was completed on A375 cells after treatment with fluvastatin to describe changes in the melanoma transcriptome. Statins induced differential expression in genes associated with metastasis and are used in commercially available prognostic tests for melanoma metastasis. Finally, we completed a chart review of 475 patients with melanoma. Patients taking statins were less likely to have metastasis at the time of melanoma diagnosis in both univariate and multivariate analyses (24.7% taking statins vs. 37.6% not taking statins, absolute risk reduction = 12.9%, P = 0.038). These findings suggest that statins might be useful as a treatment to prevent melanoma metastasis. Prospective trials are required to verify our findings and to determine the mechanism of metastasis prevention.
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Affiliation(s)
- Wesley Y Yu
- Department of Dermatology, Oregon Health & Science University, Portland, Oregon, USA.
| | - Sheena T Hill
- Department of Dermatology, University Hospitals Cleveland Medical Center, Cleveland, Ohio, USA
| | - E Ricky Chan
- Institute for Computational Biology, School of Medicine, Case Western Reserve University, Cleveland, Ohio, USA
| | - John J Pink
- Case Comprehensive Cancer Center, Case Western Reserve University, Cleveland, Ohio, USA
| | - Kevin Cooper
- Department of Dermatology, University Hospitals Cleveland Medical Center, Cleveland, Ohio, USA
| | - Sancy Leachman
- Department of Dermatology, Oregon Health & Science University, Portland, Oregon, USA; Knight Cancer Institute, Oregon Health & Science University, Portland, Oregon, USA
| | - Amanda W Lund
- Ronald O. Perelman Department of Dermatology, NYU Grossman School of Medicine, New York, New York, USA; Department of Pathology, NYU Grossman School of Medicine, New York, New York, USA; Laura and Isaac Perlmutter Cancer Center, NYU Grossman School of Medicine, New York, New York, USA
| | - Rajan Kulkarni
- Department of Dermatology, Oregon Health & Science University, Portland, Oregon, USA; Knight Cancer Institute, Oregon Health & Science University, Portland, Oregon, USA
| | - Jeremy S Bordeaux
- Department of Dermatology, University Hospitals Cleveland Medical Center, Cleveland, Ohio, USA
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16
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Verma S, Shankar E, Chan ER, Gupta S. Metabolic Reprogramming and Predominance of Solute Carrier Genes during Acquired Enzalutamide Resistance in Prostate Cancer. Cells 2020; 9:cells9122535. [PMID: 33255236 PMCID: PMC7759897 DOI: 10.3390/cells9122535] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Revised: 11/13/2020] [Accepted: 11/21/2020] [Indexed: 02/06/2023] Open
Abstract
Androgen deprivation therapy (ADT) is standard-of-care for advanced-stage prostate cancer, and enzalutamide (Xtandi®, Astellas, Northbrook, IL, USA), a second generation antiandrogen, is prescribed in this clinical setting. The response to this medication is usually temporary with the rapid emergence of drug resistance. A better understanding of gene expression changes associated with enzalutamide resistance will facilitate circumventing this problem. We compared the transcriptomic profile of paired enzalutamide-sensitive and resistant LNCaP and C4-2B prostate cancer cells for identification of genes involved in drug resistance by performing an unbiased bioinformatics analysis and further validation. Next-Gen sequencing detected 9409 and 7757 genes differentially expressed in LNCaP and C4-2B cells, compared to their parental counterparts. A subset of differentially expressed genes were validated by qRT-PCR. Analysis by the i-pathway revealed membrane transporters including solute carrier proteins, ATP-binding cassette transporters, and drug metabolizing enzymes as the most prominent genes dysregulated in resistant cell lines. RNA-Seq data demonstrated predominance of solute carrier genes SLC12A5, SLC25A17, and SLC27A6 during metabolic reprogramming and development of drug resistance. Upregulation of these genes were associated with higher uptake of lactic/citric acid and lower glucose intake in resistant cells. Our data suggest the predominance of solute carrier genes during metabolic reprogramming of prostate cancer cells in an androgen-deprived environment, thus signifying them as potentially attractive therapeutic targets.
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Affiliation(s)
- Shiv Verma
- Department of Urology, School of Medicine, Case Western Reserve University, Cleveland, OH 44106, USA; (S.V.); (E.S.)
- The Urology Institute, University Hospitals Cleveland Medical Center, Cleveland, OH 44106, USA
| | - Eswar Shankar
- Department of Urology, School of Medicine, Case Western Reserve University, Cleveland, OH 44106, USA; (S.V.); (E.S.)
- The Urology Institute, University Hospitals Cleveland Medical Center, Cleveland, OH 44106, USA
| | - E. Ricky Chan
- Institute of Computational Biology, School of Medicine, Case Western Reserve University, Cleveland, OH 44106, USA;
| | - Sanjay Gupta
- Department of Urology, School of Medicine, Case Western Reserve University, Cleveland, OH 44106, USA; (S.V.); (E.S.)
- The Urology Institute, University Hospitals Cleveland Medical Center, Cleveland, OH 44106, USA
- Department of Urology, Louis Stokes Cleveland Veterans Affairs Medical Center, Cleveland, OH 44106, USA
- Department of Nutrition, Case Western Reserve University, Cleveland, OH 44106, USA
- Division of General Medical Sciences, Case Comprehensive Cancer Center, Cleveland, OH 44106, USA
- Correspondence: ; Tel.: +1-216-368-6162; Fax: +1-216-368-0213
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17
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Sweet DR, Vasudevan NT, Fan L, Booth CE, Keerthy KS, Liao X, Vinayachandran V, Takami Y, Tugal D, Sharma N, Chan ER, Zhang L, Qing Y, Gerson SL, Fu C, Wynshaw-Boris A, Sangwung P, Nayak L, Holvoet P, Matoba K, Lu Y, Zhou G, Jain MK. Myeloid Krüppel-like factor 2 is a critical regulator of metabolic inflammation. Nat Commun 2020; 11:5872. [PMID: 33208733 PMCID: PMC7674440 DOI: 10.1038/s41467-020-19760-3] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2019] [Accepted: 10/23/2020] [Indexed: 12/20/2022] Open
Abstract
Substantial evidence implicates crosstalk between metabolic tissues and the immune system in the inception and progression of obesity. However, molecular regulators that orchestrate metaflammation both centrally and peripherally remains incompletely understood. Here, we identify myeloid Krüppel-like factor 2 (KLF2) as an essential regulator of obesity and its sequelae. In mice and humans, consumption of a fatty diet downregulates myeloid KLF2 levels. Under basal conditions, myeloid-specific KLF2 knockout mice (K2KO) exhibit increased feeding and weight gain. High-fat diet (HFD) feeding further exacerbates the K2KO metabolic disease phenotype. Mechanistically, loss of myeloid KLF2 increases metaflammation in peripheral and central tissues. A combination of pair-feeding, bone marrow-transplant, and microglial ablation implicate central and peripheral contributions to K2KO-induced metabolic dysfunction observed. Finally, overexpression of myeloid KLF2 protects mice from HFD-induced obesity and insulin resistance. Together, these data establish myeloid KLF2 as a nodal regulator of central and peripheral metabolic inflammation in homeostasis and disease. Inflammation contributes to the development of metabolic disease through incompletely understood mechanisms. Here the authors report that deletion of the transcription factor KLF2 in myeloid cells leads to increased feeding and weight gain in mice with concomitant peripheral and central tissue inflammation, while overexpression protects against diet-induced metabolic disease.
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Affiliation(s)
- David R Sweet
- Case Cardiovascular Research Institute, Case Western Reserve University, and Harrington Heart and Vascular Institute, University Hospitals Cleveland Medical Center, Cleveland, OH, USA.,Department of Pathology, Case Western Reserve University, Cleveland, OH, USA
| | - Neelakantan T Vasudevan
- Case Cardiovascular Research Institute, Case Western Reserve University, and Harrington Heart and Vascular Institute, University Hospitals Cleveland Medical Center, Cleveland, OH, USA
| | - Liyan Fan
- Case Cardiovascular Research Institute, Case Western Reserve University, and Harrington Heart and Vascular Institute, University Hospitals Cleveland Medical Center, Cleveland, OH, USA.,Department of Pathology, Case Western Reserve University, Cleveland, OH, USA
| | - Chloe E Booth
- Case Cardiovascular Research Institute, Case Western Reserve University, and Harrington Heart and Vascular Institute, University Hospitals Cleveland Medical Center, Cleveland, OH, USA
| | - Komal S Keerthy
- Case Cardiovascular Research Institute, Case Western Reserve University, and Harrington Heart and Vascular Institute, University Hospitals Cleveland Medical Center, Cleveland, OH, USA
| | - Xudong Liao
- Case Cardiovascular Research Institute, Case Western Reserve University, and Harrington Heart and Vascular Institute, University Hospitals Cleveland Medical Center, Cleveland, OH, USA
| | - Vinesh Vinayachandran
- Case Cardiovascular Research Institute, Case Western Reserve University, and Harrington Heart and Vascular Institute, University Hospitals Cleveland Medical Center, Cleveland, OH, USA
| | - Yoichi Takami
- Department of Geriatric Medicine, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Derin Tugal
- Department of Medicine, Cardiovascular Division, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA, USA
| | - Nikunj Sharma
- DBPAP/OVRR/CBER, Food and Drug Administration, Silver Spring, MD, USA
| | - E Ricky Chan
- Institute for Computational Biology, Case Western Reserve University, Cleveland, OH, USA
| | - Lilei Zhang
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA
| | - Yulan Qing
- Case Comprehensive Cancer Center, Case Western Reserve University, Cleveland, OH, USA.,National Center for Regenerative Medicine, Seidman Cancer Center, University Hospitals Cleveland Medical Center and Case Western Reserve University, Cleveland, OH, USA
| | - Stanton L Gerson
- Case Comprehensive Cancer Center, Case Western Reserve University, Cleveland, OH, USA.,National Center for Regenerative Medicine, Seidman Cancer Center, University Hospitals Cleveland Medical Center and Case Western Reserve University, Cleveland, OH, USA
| | - Chen Fu
- Department of Genetics and Genome Sciences, Case Western Reserve University, and University Hospitals Cleveland Medical Center, Cleveland, OH, USA
| | - Anthony Wynshaw-Boris
- Department of Genetics and Genome Sciences, Case Western Reserve University, and University Hospitals Cleveland Medical Center, Cleveland, OH, USA
| | - Panjamaporn Sangwung
- Case Cardiovascular Research Institute, Case Western Reserve University, and Harrington Heart and Vascular Institute, University Hospitals Cleveland Medical Center, Cleveland, OH, USA.,Department of Physiology and Biophysics, Case Western Reserve University, Cleveland, OH, USA
| | - Lalitha Nayak
- Division of Hematology and Oncology, University Hospitals Cleveland Medical Center, Cleveland, USA
| | - Paul Holvoet
- Experimental Cardiology, Department of Cardiovascular Sciences, KU Leuven, Leuven, Belgium
| | - Keiichiro Matoba
- Case Cardiovascular Research Institute, Case Western Reserve University, and Harrington Heart and Vascular Institute, University Hospitals Cleveland Medical Center, Cleveland, OH, USA
| | - Yuan Lu
- Case Cardiovascular Research Institute, Case Western Reserve University, and Harrington Heart and Vascular Institute, University Hospitals Cleveland Medical Center, Cleveland, OH, USA.,Charles River Laboratories, Ashland, OH, USA
| | - Guangjin Zhou
- Case Cardiovascular Research Institute, Case Western Reserve University, and Harrington Heart and Vascular Institute, University Hospitals Cleveland Medical Center, Cleveland, OH, USA
| | - Mukesh K Jain
- Case Cardiovascular Research Institute, Case Western Reserve University, and Harrington Heart and Vascular Institute, University Hospitals Cleveland Medical Center, Cleveland, OH, USA.
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18
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Pong Ng H, Kim GD, Ricky Chan E, Dunwoodie SL, Mahabeleshwar GH. CITED2 limits pathogenic inflammatory gene programs in myeloid cells. FASEB J 2020; 34:12100-12113. [PMID: 32697413 PMCID: PMC7496281 DOI: 10.1096/fj.202000864r] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2020] [Revised: 06/18/2020] [Accepted: 06/29/2020] [Indexed: 12/24/2022]
Abstract
Monocyte‐derived macrophages are the major innate immune cells that provide the first line of cellular defense against infections or injuries. These recruited macrophages at the site of inflammation are exposed to a broad range of cytokines that categorically incite a robust pro‐inflammatory response. However, macrophage pro‐inflammatory activation must be under exquisite control to avert unbridled inflammation. Thus, endogenous mechanisms must exist that rigorously preserve macrophage quiescence and yet, allow nimble pro‐inflammatory macrophage response with precise spatiotemporal control. Herein, we identify the CBP/p300‐interacting transactivator with glutamic acid/aspartic acid‐rich carboxyl‐terminal domain 2 (CITED2) as a critical intrinsic negative regulator of inflammation, which broadly attenuates pro‐inflammatory gene programs in macrophages. Our in vivo studies revealed that myeloid‐CITED2 deficiency significantly heightened macrophages and neutrophils recruitment to the site of inflammation. Our integrated transcriptomics and gene set enrichment analysis (GSEA) studies uncovered that CITED2 deficiency broadly enhances NFκB targets, IFNγ/IFNα responses, and inflammatory response gene expression in macrophages. Using complementary gain‐ and loss‐of‐function studies, we observed that CITED2 overexpression attenuate and CITED2 deficiency elevate LPS‐induced NFκB transcriptional activity and NFκB‐p65 recruitment to target gene promoter in macrophages. More importantly, blockade of NFκB signaling completely reversed elevated pro‐inflammatory gene expression in macrophages. Collectively, our findings show that CITED2 restrains NFκB activation and curtails broad pro‐inflammatory gene programs in myeloid cells.
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Affiliation(s)
- Hang Pong Ng
- Department of Pathology, Case Western Reserve University School of Medicine, Cleveland, OH, USA
| | - Gun-Dong Kim
- Department of Pathology, Case Western Reserve University School of Medicine, Cleveland, OH, USA
| | - E Ricky Chan
- Cleveland Institute for Computational Biology, Case Western Reserve University School of Medicine, Cleveland, OH, USA
| | - Sally L Dunwoodie
- Victor Chang Cardiac Research Institute, Sydney, Australia.,UNSW Sydney, Sydney, Australia
| | - Ganapati H Mahabeleshwar
- Department of Pathology, Case Western Reserve University School of Medicine, Cleveland, OH, USA.,Cardiovascular Research Institute, Case Western Reserve University School of Medicine, Cleveland, OH, USA
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19
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Purkayastha BPD, Chan ER, Ravillah D, Ravi L, Gupta R, Canto MI, Wang JS, Shaheen NJ, Willis JE, Chak A, Varadan V, Guda K. Genome-Scale Analysis Identifies Novel Transcript-Variants in Esophageal Adenocarcinoma. Cell Mol Gastroenterol Hepatol 2020; 10:652-654.e17. [PMID: 32344180 PMCID: PMC7474160 DOI: 10.1016/j.jcmgh.2020.04.011] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/18/2020] [Revised: 04/17/2020] [Accepted: 04/20/2020] [Indexed: 01/12/2023]
Key Words
- bm, barrett’s metaplasia
- bp, base pair
- col10a1, collagen x alpha 1 chain precursor gene
- eac, esophageal adenocarcinoma
- gast, normal gastric
- hgd, barrett’s with high grade dysplasia
- pcr, polymerase chain reaction
- qpcr, quantitative pcr
- race, rapid amplification of cdna ends
- shrna, short hairpin rna
- sq, normal esophageal squamous
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Affiliation(s)
- B P D Purkayastha
- Division of General Medical Sciences-Oncology, Case Western Reserve University School of Medicine, Cleveland, Ohio
| | - E R Chan
- Institute for Computational Biology, Case Western Reserve University School of Medicine, Cleveland, Ohio
| | - D Ravillah
- Division of General Medical Sciences-Oncology, Case Western Reserve University School of Medicine, Cleveland, Ohio
| | - L Ravi
- Division of General Medical Sciences-Oncology, Case Western Reserve University School of Medicine, Cleveland, Ohio
| | - R Gupta
- Division of Gastroenterology, Case Western Reserve University School of Medicine, Cleveland, Ohio
| | - M I Canto
- Division of Gastroenterology and Hepatology, Department of Medicine, The Johns Hopkins Medical Institutions, Baltimore, Maryland
| | - J S Wang
- Division of Gastroenterology, Department of Medicine, Washington University School of Medicine, St Louis, Missouri
| | - N J Shaheen
- Center for Esophageal Diseases and Swallowing, Division of Gastroenterology and Hepatology, University of North Carolina, Chapel Hill, North Carolina
| | - J E Willis
- Department of Pathology, Case Comprehensive Cancer Center, Case Western Reserve University School of Medicine, Cleveland, Ohio
| | - A Chak
- Division of Gastroenterology, Case Western Reserve University School of Medicine, Cleveland, Ohio
| | - V Varadan
- Division of General Medical Sciences-Oncology, Case Western Reserve University School of Medicine, Cleveland, Ohio
| | - K Guda
- Division of General Medical Sciences-Oncology, Case Western Reserve University School of Medicine, Cleveland, Ohio; Department of Pathology, Case Comprehensive Cancer Center, Case Western Reserve University School of Medicine, Cleveland, Ohio.
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20
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Kim GD, Ng HP, Chan ER, Mahabeleshwar GH. Kruppel-like factor 6 promotes macrophage inflammatory and hypoxia response. FASEB J 2020; 34:3209-3223. [PMID: 31908054 PMCID: PMC7774039 DOI: 10.1096/fj.201902221r] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2019] [Revised: 11/26/2019] [Accepted: 12/23/2019] [Indexed: 12/20/2022]
Abstract
Macrophages are the professional phagocytes that protect the host from infection or injury. Tissue microenvironment at the site of injury and inflammation is characterized by low oxygen concentration and poor supply of nutrients. The responding macrophages have to advance against oxygen and nutrient gradients to reach the site of inflammation to perform host protection, and tissue repair functions. Thus, evolution has fashioned macrophages to orchestrate a coordinated inflammatory and hypoxic gene program to mount an effective immune response. Here, we discovered that Kruppel‐like factor 6 (KLF6) governs macrophage functions by promoting inflammatory and hypoxic response gene programming. Our in vivo studies revealed that myeloid‐KLF6‐deficient mice were highly resistant to endotoxin‐induced systemic inflammatory response syndrome symptomatology and mortality. Using complementary gain‐ and loss‐of‐function studies, we observed that KLF6 overexpression elevate and KLF6 deficiency attenuate inducible HIF1α expression in macrophages. Our integrated transcriptomics and gene set enrichment analysis studies uncovered that KLF6 deficiency attenuates broad inflammatory and glycolytic gene expression in macrophages. More importantly, overexpression of oxygen stable HIF1α reversed attenuated proinflammatory and glycolytic gene expression in KLF6‐deficient macrophages. Collectively, our studies uncovered that KLF6 govern inflammatory and hypoxic response by regulating HIF1α expression in macrophage.
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Affiliation(s)
- Gun-Dong Kim
- Department of Pathology, Case Western Reserve University School of Medicine, Cleveland, OH, USA
| | - Hang Pong Ng
- Department of Pathology, Case Western Reserve University School of Medicine, Cleveland, OH, USA
| | - E Ricky Chan
- Cleveland Institute for Computational Biology, Case Western Reserve University School of Medicine, Cleveland, OH, USA
| | - Ganapati H Mahabeleshwar
- Department of Pathology, Case Western Reserve University School of Medicine, Cleveland, OH, USA.,Cardiovascular Research Institute, Case Western Reserve University School of Medicine, Cleveland, OH, USA
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21
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Sergeeva O, Kepe V, Zhang Y, Miller-Atkins GA, Keynon JD, Iyer R, Sexton S, Awadallah A, Xin W, Saunthararajah Y, Chan ER, Lee Z. [ 18F] Clofarabine for PET Imaging of Hepatocellular Carcinoma. Cancers (Basel) 2019; 11:cancers11111748. [PMID: 31703407 PMCID: PMC6896045 DOI: 10.3390/cancers11111748] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2019] [Accepted: 11/05/2019] [Indexed: 12/17/2022] Open
Abstract
Clinical diagnosis of hepatocellular carcinoma (HCC) relies heavily on radiological imaging. However, information pertaining to liver cancer treatment such as the proliferation status is lacking. Imaging tumor proliferation can be valuable in patient management. This study investigated 18F-labeled clofarabine ([18F]CFA) targeting deoxycytidine kinase (dCK) for PET imaging of dCK-dependent proliferation in HCC. Since clinical PET scans showed a high liver background uptake of [18F]CFA, the aim of this study was to reduce this liver background uptake. A clinically relevant animal model of spontaneously developed HCC in the woodchucks was used for imaging experiments. Several modifiers were tested and compared with the baseline PET scan: Forodesine, probenecid, and cold clofarabine, all applied before the hot [18F]CFA injection to evaluate the reduction in liver background uptake. Application of forodesine before hot [18F]CFA injection did not reduce the background uptake. Instead, it increased the background by 11.6–36.3%. Application of probenecid also increased the liver background uptake by 16.6–32.1%. Cold CFA application did reduce the liver background uptake of [18F]CFA, comparing to the baseline scan. Combining cold CFA with [18F]CFA for PET imaging of liver cancers is a promising strategy, worthy of further clinical evaluation.
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Affiliation(s)
- Olga Sergeeva
- Radiology, Case Western Reserve University, Cleveland, OH 44106, USA; (O.S.); (Y.Z.)
| | - Vladimir Kepe
- Nuclear Medicine, Cleveland Clinic, Cleveland, OH 44195, USA;
| | - Yifan Zhang
- Radiology, Case Western Reserve University, Cleveland, OH 44106, USA; (O.S.); (Y.Z.)
| | | | | | - Renuka Iyer
- Medical Oncology, Rowell Park Comprehensive Cancer Center, Buffalo, NY 14263, USA; (R.I.); (S.S.)
| | - Sandra Sexton
- Medical Oncology, Rowell Park Comprehensive Cancer Center, Buffalo, NY 14263, USA; (R.I.); (S.S.)
| | - Amad Awadallah
- Pathology, University Hospitals Cleveland Medical Center, Cleveland, OH 44106, USA; (A.A.); (W.X.)
| | - Wei Xin
- Pathology, University Hospitals Cleveland Medical Center, Cleveland, OH 44106, USA; (A.A.); (W.X.)
| | | | - E. Ricky Chan
- Institute for Computational Biology, Cleveland, OH 44106, USA; (G.A.M.-A.); (E.R.C.)
| | - Zhenghong Lee
- Radiology, Case Western Reserve University, Cleveland, OH 44106, USA; (O.S.); (Y.Z.)
- Nuclear Medicine, Cleveland Clinic, Cleveland, OH 44195, USA;
- Correspondence: ; Tel.: +1-216-844-7920
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22
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Sergeeva O, Zhang Y, Kenyon JD, Miller-Atkins GA, Wu C, Iyer R, Sexton S, Wojtylak P, Awadallah A, Xin W, Chan ER, O’Donnel JK, Lee Z. PET imaging of hepatocellular carcinoma with anti-1-amino-3-[ 18F]fluorocyclobutanecarboxylic acid in comparison with L-[S-methyl- 11C]methionine. EJNMMI Res 2019; 9:47. [PMID: 31119488 PMCID: PMC6531569 DOI: 10.1186/s13550-019-0519-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2018] [Accepted: 04/12/2019] [Indexed: 12/12/2022] Open
Abstract
PURPOSE [11C]methionine ([11C]Met) was used for cancer imaging based on upregulated amino acid transport and protein synthesis in different tumor types. However, the short half-life of 11C decay limited further clinical development of [11C]Met. Synthetic amino acid analog anti-1-amino-3-[18F]fluoro-cyclobutyl-1-carboxylic acid ([18F]FCABC) was developed and FDA-approved for PET imaging of recurrent prostate cancer. This study investigated "repurposed" [18F]FACBC for PET imaging of primary liver cancer such as hepatocellular carcinoma (HCC) in comparison with [11C]Met. METHODS [11C]Met was synthesized in the lab, and [18F]FACBC was purchased from a commercial outlet. A clinically relevant animal model of spontaneously developed HCC in the woodchucks was used for PET imaging. Bioinformatics analysis was performed for the expression of amino acid transporters responsible for radiotracer uptake and validated by PCR. Dynamic PET scans of [11C]Met and [18F]FACBC were acquired within 1 week. Standardized uptake value (SUV) was calculated for regions of interest (ROIs) defined over HCC and a liver background region. H&E staining and immunohistochemical (IHC) staining were performed with harvested tissues post-imaging. RESULTS Higher expression of ACST2 and LAT1 was found in HCC than in the surrounding liver tissues. PCR validated this differential expression. [11C]Met and [18F]FACBC displayed some differences in their uptake and retention in HCC. Both peaked in HCC with an SUV of 3.5 after 10 min post-injection. Met maintained a plateaued contrast uptake in HCC to that in the liver while [18F]FCABC declined in HCC and liver after peak uptake. The pathological assessment revealed the liver tumor as moderately differentiated similar to the human HCC and proliferative. CONCLUSION Both [18F]FACBC and [11C]Met showed uptake in HCC through the use of a clinically relevant animal model of woodchuck HCC. The uptake and retention of [18F]FACBC and [11C]Met depend on their metabolism and also rely on the distribution of their principal amino acid transporters.
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Affiliation(s)
- Olga Sergeeva
- Radiology, Case Western Reserve University, Cleveland, OH USA
| | - Yifan Zhang
- Radiology, Case Western Reserve University, Cleveland, OH USA
| | | | | | - Chunying Wu
- Radiology, Case Western Reserve University, Cleveland, OH USA
| | - Renuka Iyer
- Medical Oncology, Rowell Park Cancer Institute, Buffalo, NY USA
| | - Sandra Sexton
- Medical Oncology, Rowell Park Cancer Institute, Buffalo, NY USA
| | - Patrick Wojtylak
- Nuclear Medicine, Radiology, University Hospitals Cleveland Medical Center, Cleveland, OH USA
| | - Amad Awadallah
- Pathology, University Hospitals Cleveland Medical Center, Cleveland, OH USA
| | - Wei Xin
- Pathology, University Hospitals Cleveland Medical Center, Cleveland, OH USA
| | - E. Ricky Chan
- Institute for Computational Biology, Cleveland, OH USA
| | - James K. O’Donnel
- Nuclear Medicine, Radiology, University Hospitals Cleveland Medical Center, Cleveland, OH USA
| | - Zhenghong Lee
- Radiology, Case Western Reserve University, Cleveland, OH USA
- Nuclear Medicine, Radiology, University Hospitals Cleveland Medical Center, Cleveland, OH USA
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23
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Sweet D, Vasudevan N, Fan L, Takami Y, Tugal D, Sharma N, Chan ER, Zhang L, Fu C, Wynshaw-Boris A, Sangwung P, Nayak L, Holvoet P, Matoba K, Lu Y, Jain M. SUN-LB019 Myeloid Krüppel-like Factor 2 is a Critical Regulator of Metabolic Inflammation. J Endocr Soc 2019. [PMCID: PMC6552753 DOI: 10.1210/js.2019-sun-lb019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Substantial evidence implicates crosstalk between metabolic tissues and the immune system, both centrally and peripherally, in the inception and progression of obesity. Nodal factors that orchestrate systemic “metaflammation” remain very incompletely understood. Here, we identify myeloid Krüppel-like factor 2 (KLF2) as an essential regulator of obesity and its sequelae. Macrophages with KLF2 deletion enrich transcriptional networks associated with metabolic syndrome. In mice and humans, consumption of a fatty diet is associated with downregulation of KLF2 in myeloid cells. Mice with myeloid specific deletion of KLF2 (K2KO) exhibited basal metabolic disturbances including increased feeding contributing to rapid weight gain. Stimulating K2KO mice with metaflammatory stress (high fat diet) caused genotype-dependent increases in insulin resistance and non-alcoholic steatohepatitis. Mechanistically, loss of myeloid KLF2 increased metaflammation in peripheral (white adipose, liver) and central (hypothalamus) metabolic tissues, demonstrating the widespread regulation that KLF2 poses on metabolic homeostasis. This regulation occurs, in part, through KLF2’s attenuation of inflammasome activation, a major pathogenic mechanism of metabolic disease. Critically, overexpression of KLF2 in the myeloid compartment protected mice from long-term HFD-induced obesity and insulin resistance. Together, these data establish myeloid KLF2 as a decisive regulator of central and peripheral metabolic inflammation in homeostasis and disease. Funding: This work was funded by the American Heart Association and National Institutes of Health from the NHLBI and NIGMS. Unless otherwise noted, all abstracts presented at ENDO are embargoed until the date and time of presentation. For oral presentations, the abstracts are embargoed until the session begins. Abstracts presented at a news conference are embargoed until the date and time of the news conference. The Endocrine Society reserves the right to lift the embargo on specific abstracts that are selected for promotion prior to or during ENDO.
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Affiliation(s)
- David Sweet
- Case Western Reserve University and University Hospitals Cleveland Medical Center, Cleveland, OH, United States
| | - Neelakantan Vasudevan
- Case Western Reserve University and University Hospitals Cleveland Medical Center, Cleveland, OH, United States
| | - Liyan Fan
- Case Western Reserve University and University Hospitals Cleveland Medical Center, Cleveland Heights, OH, United States
| | | | - Derin Tugal
- Beth Israel Deaconess Medical Center, Boston, MA, United States
| | - Nikunj Sharma
- Food and Drug Administration, Silver Spring, MD, United States
| | - E. Ricky Chan
- Case Western Reserve University and University Hospitals Cleveland Medical Center, Cleveland, OH, United States
| | - Lilei Zhang
- Baylor College of Medicine, Houston, TX, United States
| | - Chen Fu
- Case Western Reserve University and University Hospitals Cleveland Medical Center, Cleveland, OH, United States
| | - Anthony Wynshaw-Boris
- Case Western Reserve University and University Hospitals Cleveland Medical Center, Cleveland, OH, United States
| | - Panjamaporn Sangwung
- Case Western Reserve University and University Hospitals Cleveland Medical Center, Cleveland, OH, United States
| | - Lalitha Nayak
- University Hospitals Cleveland Medical Center, Cleveland, OH, United States
| | | | - Keiichiro Matoba
- Case Western Reserve University and University Hospitals Cleveland Medical Center, Cleveland, OH, United States
| | - Yuan Lu
- Case Western Reserve University and University Hospitals Cleveland Medical Center, Cleveland, OH, United States
| | - Mukesh Jain
- Case Western Reserve University and University Hospitals Cleveland Medical Center, Cleveland, OH, United States
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24
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Han S, Ray JW, Pathak P, Sweet DR, Zhang R, Gao H, Jain N, Koritzinsky EH, Matoba K, Xu W, Chan ER, Simon DI, Jain MK. KLF15 regulates endobiotic and xenobiotic metabolism. Nat Metab 2019; 1:422-430. [PMID: 32694878 DOI: 10.1038/s42255-019-0054-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/11/2018] [Accepted: 03/08/2019] [Indexed: 01/06/2023]
Abstract
Hepatic metabolism and elimination of endobiotics (for example, steroids, bile acids) and xenobiotics (for example, drugs, toxins) is essential for health. While the enzymatic (termed phase I-II) and transport machinery (termed phase III) controlling endobiotic and xenobiotic metabolism (EXM) is known, understanding of molecular nodal points that coordinate EXM function in physiology and disease remains incomplete. Here we show that the transcription factor Kruppel-like factor 15 (KLF15) regulates all three phases of the EXM system by direct and indirect pathways. Unbiased transcriptomic analyses coupled with validation studies in cells, human tissues, and animals, support direct transcriptional control of the EXM machinery by KLF15. Liver-specific deficiency of KLF15 (Li-KO) results in altered expression of numerous phase I-III targets, and renders animals resistant to the pathologic effects of bile acid and acetaminophen toxicity. Furthermore, Li-KO mice demonstrate enhanced degradation and elimination of endogenous steroid hormones, such as testosterone and glucocorticoid, resulting in reduced male fertility and blood glucose levels, respectively. Viral reconstitution of hepatic KLF15 expression in Li-KO mice reverses these phenotypes. Our observations identify a previously unappreciated transcriptional pathway regulating metabolism and elimination of endobiotics and xenobiotics.
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Affiliation(s)
- Shuxin Han
- Case Cardiovascular Research Institute Case Western Reserve University, Harrington Heart and Vascular Institute University Hospitals Cleveland Medical Center, Cleveland, OH, USA.
| | - Jonathan W Ray
- Department of Physiology, Case Western Reserve University, Cleveland, OH, USA
- Joan C. Edwards School of Medicine, Marshall University, Huntington, WV, USA
| | - Preeti Pathak
- Case Cardiovascular Research Institute Case Western Reserve University, Harrington Heart and Vascular Institute University Hospitals Cleveland Medical Center, Cleveland, OH, USA
| | - David R Sweet
- Case Cardiovascular Research Institute Case Western Reserve University, Harrington Heart and Vascular Institute University Hospitals Cleveland Medical Center, Cleveland, OH, USA
- Department of Pathology, Case Western Reserve University, Cleveland, OH, USA
| | - Rongli Zhang
- Case Cardiovascular Research Institute Case Western Reserve University, Harrington Heart and Vascular Institute University Hospitals Cleveland Medical Center, Cleveland, OH, USA
- Institute for Transformative Molecular Medicine Case Western Reserve University, Harrington Heart and Vascular Institute University Hospitals Cleveland Medical Center, Cleveland, OH, USA
| | - Huiyun Gao
- Case Cardiovascular Research Institute Case Western Reserve University, Harrington Heart and Vascular Institute University Hospitals Cleveland Medical Center, Cleveland, OH, USA
| | - Nisha Jain
- Case Cardiovascular Research Institute Case Western Reserve University, Harrington Heart and Vascular Institute University Hospitals Cleveland Medical Center, Cleveland, OH, USA
| | - Erik H Koritzinsky
- Case Cardiovascular Research Institute Case Western Reserve University, Harrington Heart and Vascular Institute University Hospitals Cleveland Medical Center, Cleveland, OH, USA
| | - Keiichiro Matoba
- Case Cardiovascular Research Institute Case Western Reserve University, Harrington Heart and Vascular Institute University Hospitals Cleveland Medical Center, Cleveland, OH, USA
- Division of Diabetes, Metabolism and Endocrinology, Department of Internal Medicine, Jikei University School of Medicine, Tokyo, Japan
| | - Weixiong Xu
- Cleveland School of Science and Medicine at John Hay Campus, Cleveland, OH, USA
- College of Arts and Sciences, Ohio State University, Columbus, OH, USA
| | - E Ricky Chan
- Institute for Computational Biology, Case Western Reserve University, Cleveland, OH, USA
| | - Daniel I Simon
- Case Cardiovascular Research Institute Case Western Reserve University, Harrington Heart and Vascular Institute University Hospitals Cleveland Medical Center, Cleveland, OH, USA
| | - Mukesh K Jain
- Case Cardiovascular Research Institute Case Western Reserve University, Harrington Heart and Vascular Institute University Hospitals Cleveland Medical Center, Cleveland, OH, USA.
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25
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Sangwung P, Zhou G, Nayak L, Chan ER, Kumar S, Kang DW, Zhang R, Liao X, Lu Y, Sugi K, Fujioka H, Shi H, Lapping SD, Ghosh CC, Higgins SJ, Parikh SM, Jo H, Jain MK. KLF2 and KLF4 control endothelial identity and vascular integrity. JCI Insight 2017; 2:e91700. [PMID: 28239661 DOI: 10.1172/jci.insight.91700] [Citation(s) in RCA: 136] [Impact Index Per Article: 19.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Maintenance of vascular integrity in the adult animal is needed for survival, and it is critically dependent on the endothelial lining, which controls barrier function, blood fluidity, and flow dynamics. However, nodal regulators that coordinate endothelial identity and function in the adult animal remain poorly characterized. Here, we show that endothelial KLF2 and KLF4 control a large segment of the endothelial transcriptome, thereby affecting virtually all key endothelial functions. Inducible endothelial-specific deletion of Klf2 and/or Klf4 reveals that a single allele of either gene is sufficient for survival, but absence of both (EC-DKO) results in acute death from myocardial infarction, heart failure, and stroke. EC-DKO animals exhibit profound compromise in vascular integrity and profound dysregulation of the coagulation system. Collectively, these studies establish an absolute requirement for KLF2/4 for maintenance of endothelial and vascular integrity in the adult animal.
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Affiliation(s)
- Panjamaporn Sangwung
- Cardiovascular Research Institute, Department of Medicine, and.,Department of Physiology and Biophysics, Case Western Reserve University School of Medicine, Cleveland, Ohio, USA
| | - Guangjin Zhou
- Cardiovascular Research Institute, Department of Medicine, and
| | - Lalitha Nayak
- Cardiovascular Research Institute, Department of Medicine, and.,Division of Hematology and Oncology, University Hospitals Cleveland Medical Center, Case Western Reserve University, Cleveland, Ohio, USA
| | - E Ricky Chan
- Institute for Computational Biology, Case Western Reserve University School of Medicine, Cleveland, Ohio, USA
| | - Sandeep Kumar
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, Georgia, USA
| | - Dong-Won Kang
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, Georgia, USA
| | - Rongli Zhang
- Cardiovascular Research Institute, Department of Medicine, and
| | - Xudong Liao
- Cardiovascular Research Institute, Department of Medicine, and
| | - Yuan Lu
- Cardiovascular Research Institute, Department of Medicine, and
| | - Keiki Sugi
- Cardiovascular Research Institute, Department of Medicine, and
| | - Hisashi Fujioka
- Electron Microscopy Core Facility, Case Western Reserve University School of Medicine, Cleveland, Ohio, USA
| | - Hong Shi
- Cardiovascular Research Institute, Department of Medicine, and
| | | | - Chandra C Ghosh
- Center for Vascular Biology Research and Department of Medicine, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, Massachusetts, USA
| | - Sarah J Higgins
- Center for Vascular Biology Research and Department of Medicine, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, Massachusetts, USA
| | - Samir M Parikh
- Center for Vascular Biology Research and Department of Medicine, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, Massachusetts, USA
| | - Hanjoong Jo
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, Georgia, USA.,Division of Cardiology, Emory University, Atlanta, Georgia, USA
| | - Mukesh K Jain
- Cardiovascular Research Institute, Department of Medicine, and.,Department of Physiology and Biophysics, Case Western Reserve University School of Medicine, Cleveland, Ohio, USA.,Harrington Heart and Vascular Institute, University Hospitals Cleveland Medical Center, Cleveland, Ohio, USA
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26
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Miskimen KLS, Chan ER, Haines JL. Assay for Transposase-Accessible Chromatin Using Sequencing (ATAC-seq) Data Analysis. ACTA ACUST UNITED AC 2017; 92:20.4.1-20.4.13. [PMID: 28075484 DOI: 10.1002/cphg.32] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The study of epigenetic properties of the human genome, including structural modifications of DNA and chromatin, has increased tremendously as mounting evidence has demonstrated how much epigenetics affects human gene expression. Buenrostro et al. have developed a rapid method, requiring low numbers of living cells as input, for examining chromatin accessibility across the epigenome, known as the assay for transposase-accessible chromatin using sequencing (ATAC-seq). The overall goal of this unit is to provide a thorough ATAC-seq data analysis plan, as well as describe how primary human blood samples can be processed for use in ATAC-seq. In addition, a number of quality control parameters are discussed to ensure the integrity and confidence in the ATAC-seq data. © 2017 by John Wiley & Sons, Inc.
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Affiliation(s)
- Kristy L S Miskimen
- Department of Epidemiology and Biostatistics, Case Western Reserve University, Cleveland, Ohio
| | - E Ricky Chan
- Institute of Computational Biology, Case Western Reserve University, Cleveland, Ohio
| | - Jonathan L Haines
- Department of Epidemiology and Biostatistics, Case Western Reserve University, Cleveland, Ohio.,Institute of Computational Biology, Case Western Reserve University, Cleveland, Ohio
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Yashchuk VV, Fischer PJ, Chan ER, Conley R, McKinney WR, Artemiev NA, Bouet N, Cabrini S, Calafiore G, Lacey I, Peroz C, Babin S. Binary pseudo-random patterned structures for modulation transfer function calibration and resolution characterization of a full-field transmission soft x-ray microscope. Rev Sci Instrum 2015; 86:123702. [PMID: 26724037 DOI: 10.1063/1.4936752] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
We present a modulation transfer function (MTF) calibration method based on binary pseudo-random (BPR) one-dimensional sequences and two-dimensional arrays as an effective method for spectral characterization in the spatial frequency domain of a broad variety of metrology instrumentation, including interferometric microscopes, scatterometers, phase shifting Fizeau interferometers, scanning and transmission electron microscopes, and at this time, x-ray microscopes. The inherent power spectral density of BPR gratings and arrays, which has a deterministic white-noise-like character, allows a direct determination of the MTF with a uniform sensitivity over the entire spatial frequency range and field of view of an instrument. We demonstrate the MTF calibration and resolution characterization over the full field of a transmission soft x-ray microscope using a BPR multilayer (ML) test sample with 2.8 nm fundamental layer thickness. We show that beyond providing a direct measurement of the microscope's MTF, tests with the BPRML sample can be used to fine tune the instrument's focal distance. Our results confirm the universality of the method that makes it applicable to a large variety of metrology instrumentation with spatial wavelength bandwidths from a few nanometers to hundreds of millimeters.
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Affiliation(s)
- V V Yashchuk
- Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - P J Fischer
- Center for X-Ray Optics, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - E R Chan
- Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - R Conley
- Advance Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - W R McKinney
- Diablo Valley College, 321 Golf Club Road, Pleasant Hill, California 94523, USA
| | - N A Artemiev
- KLA-Tencor Corp., 1 Technology Drive, Milpitas, California 95035, USA
| | - N Bouet
- National Synchrotron Light Source II, Brookhaven National Laboratory, Upton, New York 11973, USA
| | - S Cabrini
- Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - G Calafiore
- aBeam Technologies, Inc., Hayward, California 94541, USA
| | - I Lacey
- Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - C Peroz
- aBeam Technologies, Inc., Hayward, California 94541, USA
| | - S Babin
- aBeam Technologies, Inc., Hayward, California 94541, USA
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Stefanini L, Paul DS, Robledo RF, Chan ER, Getz TM, Campbell RA, Kechele DO, Casari C, Piatt R, Caron KM, Mackman N, Weyrich AS, Parrott MC, Boulaftali Y, Adams MD, Peters LL, Bergmeier W. RASA3 is a critical inhibitor of RAP1-dependent platelet activation. J Clin Invest 2015; 125:1419-32. [PMID: 25705885 DOI: 10.1172/jci77993] [Citation(s) in RCA: 98] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2014] [Accepted: 01/13/2015] [Indexed: 01/15/2023] Open
Abstract
The small GTPase RAP1 is critical for platelet activation and thrombus formation. RAP1 activity in platelets is controlled by the GEF CalDAG-GEFI and an unknown regulator that operates downstream of the adenosine diphosphate (ADP) receptor, P2Y12, a target of antithrombotic therapy. Here, we provide evidence that the GAP, RASA3, inhibits platelet activation and provides a link between P2Y12 and activation of the RAP1 signaling pathway. In mice, reduced expression of RASA3 led to premature platelet activation and markedly reduced the life span of circulating platelets. The increased platelet turnover and the resulting thrombocytopenia were reversed by concomitant deletion of the gene encoding CalDAG-GEFI. Rasa3 mutant platelets were hyperresponsive to agonist stimulation, both in vitro and in vivo. Moreover, activation of Rasa3 mutant platelets occurred independently of ADP feedback signaling and was insensitive to inhibitors of P2Y12 or PI3 kinase. Together, our results indicate that RASA3 ensures that circulating platelets remain quiescent by restraining CalDAG-GEFI/RAP1 signaling and suggest that P2Y12 signaling is required to inhibit RASA3 and enable sustained RAP1-dependent platelet activation and thrombus formation at sites of vascular injury. These findings provide insight into the antithrombotic effect of P2Y12 inhibitors and may lead to improved diagnosis and treatment of platelet-related disorders.
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Wang C, Hexemer A, Nasiatka J, Chan ER, Young AT, Padmore HA, Schlotter WF, Lüning J, Swaraj S, Watts B, Gann E, Yan H, Ade H. Resonant Soft X-ray Scattering of Polymers with a 2D Detector: Initial Results and System Developments at the Advanced Light Source. ACTA ACUST UNITED AC 2010. [DOI: 10.1088/1757-899x/14/1/012016] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Chan ER, Lavender H, Li G, Haviernik P, Bunting KD, Adams MD. An ENU-induced recessive mutation in Mpl leads to thrombocytopenia with overdominance. Exp Hematol 2008; 37:276-84. [PMID: 19059699 DOI: 10.1016/j.exphem.2008.10.005] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2007] [Revised: 10/07/2008] [Accepted: 10/08/2008] [Indexed: 01/07/2023]
Abstract
OBJECTIVE The aim of this study was to identify and characterize the causative mutation in the thrombocytopenic mouse strain HLB219 that was generated at the Jackson Laboratory as part of a large-scale N-ethyl-N-nitrosourea mutagenesis screen. MATERIALS AND METHODS The HLB219 mutation was identified by interval mapping of F2 mice generated from intercross breeding of HLB219 to both BALB/cByJ (BALB) and 129/SvImJ (129/Sv). Mpl was identified as a candidate gene and sequenced. The mutation was characterized in vivo in mouse hematopoietic stem/progenitor cell assays and in cell culture by expression in Ba/F3 cells. RESULTS A novel mutation in the thrombopoietin (TPO) receptor Mpl in HLB219 mice caused a Cys-->Arg substitution at codon 40 in the extracellular region of the receptor. Mice homozygous for the Mpl(hlb219) mutation had an 80% decrease in the number of platelets in comparison to the wild-type C57BL/6J strain, low numbers of bone marrow megakaryocytes, high TPO levels, and decreased competitive repopulating ability, consistent with a loss-of-function mutation in the receptor. Mice heterozygous for Mpl(hlb219) however, showed an overdominance effect with a significant increase in platelet number. Functional analysis in vitro demonstrated that Ba/F3 cells expressing the mutant MPL(hlb219) protein failed to activate extracellular signal-regulated kinase and signal transducers and activators of transcription 5, but proliferated in the absence of TPO and required constitutive phosphorylation of RAC-alpha serine/threonine protein kinase (AKT) for cytokine-independent growth. CONCLUSION Thrombocytopenia in HLB219 mice is caused by a recessive mutation in Mpl that abrogates mitogen-activated protein kinase-extracellular signal regulated kinase and janus kinase-signal transducers and activators of transcription signaling.
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Affiliation(s)
- E Ricky Chan
- Department of Genetics, Case Western Reserve University, Cleveland, Ohio 44106-4955, USA
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Abstract
Trisomy 13 is one of the most common trisomies in clinically recognized pregnancies and one of the few trisomies identified in liveborns, yet relatively little is known about the errors that lead to trisomy 13. Accordingly, we initiated studies to investigate the origin of the extra chromosome in 78 cases of trisomy 13. Our results indicate that the majority of cases (>91%) are maternal in origin and, similar to other autosomal trisomies, the extra chromosome is typically due to errors in meiosis I. Surprisingly, however, a large number of errors also occur during maternal meiosis II ( approximately 37%), distinguishing trisomy 13 from other acrocentric and most nonacrocentric chromosomes. As with other trisomies, failure to recombine is an important contributor to nondisjunction of chromosome 13.
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Affiliation(s)
- Heather E Hall
- Center for Reproductive Biology and School of Molecular Biosciences, Washington State University, Pullman, Washington 99164-4660, USA
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Brown PW, Judis L, Chan ER, Schwartz S, Seftel A, Thomas A, Hassold TJ. Meiotic synapsis proceeds from a limited number of subtelomeric sites in the human male. Am J Hum Genet 2005; 77:556-66. [PMID: 16175502 PMCID: PMC1275605 DOI: 10.1086/468188] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2005] [Accepted: 07/18/2005] [Indexed: 11/03/2022] Open
Abstract
The formation of the synaptonemal complex (SC) is a crucial early step in the meiotic process, but relatively little is known about the establishment of the human SC. Accordingly, we recently initiated a study of synapsis in the human male, combining immunofluorescence and fluorescence in situ hybridization methodologies to analyze prophase spermatocytes from a series of control individuals. Our results indicate that synapsis is a tightly regulated process, with relatively little variation among individuals. On nonacrocentric chromosomes, there are two synaptic initiation sites, one on the distal short arm and one on the distal long arm, whereas acrocentric chromosomes exhibit a single site on the distal long arm. For both types of chromosomes, synapsis then proceeds toward the centromere, with little evidence that specific p- or q-arm sequences affect the process. However, the centromere appears to have an inhibitory effect on synapsis--that is, when one arm of a nonacrocentric chromosome is "zippered up" before the other, the centromere acts as a barrier to further movement from that arm.
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Affiliation(s)
- Petrice W Brown
- Center for Human Genetics, Case Western Reserve University School of Medicine and University Hospitals of Cleveland, Cleveland, OH, USA
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Hassold T, Judis L, Chan ER, Schwartz S, Seftel A, Lynn A. Cytological studies of meiotic recombination in human males. Cytogenet Genome Res 2005; 107:249-55. [PMID: 15467369 DOI: 10.1159/000080602] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2003] [Accepted: 08/06/2004] [Indexed: 11/19/2022] Open
Abstract
We combined immunostaining and fluorescence in situ hybridization (FISH) methodology to directly examine meiotic exchanges in over 2,000 pachytene stage spermatocytes from 25 individuals. Our results indicate that, on average, there are about 50 exchanges per cell and that, with the exception of the acrocentric chromosomes, all chromosome arms harbor at least one exchange. We also identified significant among-individual variation in the mean number of exchanges, with an approximate 20% difference between individuals with "low" and those with "high" exchange frequencies.
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Affiliation(s)
- T Hassold
- Department of Genetics and The Center for Human Genetics, Case Western Reserve University and University Hospitals of Cleveland, Cleveland VA Medical Center, Cleveland, OH 44106, USA.
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Hassold TJ, Burrage LC, Chan ER, Judis LM, Schwartz S, James SJ, Jacobs PA, Thomas NS. Maternal folate polymorphisms and the etiology of human nondisjunction. Am J Hum Genet 2001; 69:434-9. [PMID: 11443546 PMCID: PMC1235315 DOI: 10.1086/321971] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2001] [Accepted: 06/01/2001] [Indexed: 11/03/2022] Open
Abstract
Attempts to identify genetic contributors to human meiotic nondisjunction have met with little, if any, success. Thus, recent reports linking Down syndrome to maternal polymorphisms at either of two folate metabolism enzymes, methylenetetrahydrofolate reductase (MTHFR) and methionine synthase reductase (MTRR), have generated considerable interest. In the present report, we asked whether variation at MTHFR (677C-->T) or MTRR (66A-->G) might be associated with human trisomies other than trisomy 21. We analyzed maternal polymorphisms at MTHFR and MTRR in 93 cases of sex-chromosome trisomy, 44 cases of trisomy 18, and 158 cases of autosomal trisomies 2, 7, 10, 13, 14, 15, 16, 18, or 22, and compared the distributions of genotypes to those of control populations. We observed a significant increase in the MTHFR polymorphism in mothers of trisomy 18 conceptuses but were unable to identify any other significant associations. Overall, our observations suggest that, at least for the sex chromosomes and for a combined set of autosomal trisomies, polymorphisms in the folate pathway are not a significant contributor to human meiotic nondisjunction.
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Affiliation(s)
- T J Hassold
- Department of Genetics and The Center for Human Genetics, Case Western Reserve University and University Hospitals of Cleveland, Cleveland, OH 44106, USA.
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