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Gheinani AH, Sack BS, Bigger-Allen A, Thaker H, Atta H, Lambrinos G, Costa K, Doyle C, Gharaee-Kermani M, Patalano S, Piper M, Cotellessa JF, Vitko D, Li H, Prabhakaran MK, Cristofaro V, Froehlich J, Lee RS, Yang W, Sullivan MP, Macoska JA, Adam RM. Integrated omics analysis unveils a DNA damage response to neurogenic injury. bioRxiv 2023:2023.12.10.571015. [PMID: 38106029 PMCID: PMC10723451 DOI: 10.1101/2023.12.10.571015] [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] [Subscribe] [Scholar Register] [Indexed: 12/19/2023]
Abstract
Spinal cord injury (SCI) evokes profound bladder dysfunction. Current treatments are limited by a lack of molecular data to inform novel therapeutic avenues. Previously, we showed systemic inosine treatment improved bladder function following SCI in rats. Here, we applied multi-omics analysis to explore molecular alterations in the bladder and their sensitivity to inosine following SCI. Canonical pathways regulated by SCI included those associated with protein synthesis, neuroplasticity, wound healing, and neurotransmitter degradation. Upstream regulator analysis identified MYC as a key regulator, whereas causal network analysis predicted multiple regulators of DNA damage response signaling following injury, including PARP-1. Staining for both DNA damage (γH2AX) and PARP activity (poly-ADP-ribose) markers in the bladder was increased following SCI, and attenuated in inosine-treated tissues. Proteomics analysis suggested that SCI induced changes in protein synthesis-, neuroplasticity-, and oxidative stress-associated pathways, a subset of which were shown in transcriptomics data to be inosine-sensitive. These findings provide novel insights into the molecular landscape of the bladder following SCI, and highlight a potential role for PARP inhibition to treat neurogenic bladder dysfunction.
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Affiliation(s)
- Ali Hashemi Gheinani
- Urological Diseases Research Center, Boston Children's Hospital, Boston, MA, USA
- Functional Urology Research Group, Department for BioMedical Research DBMR, University of Bern, Switzerland
- Department of Urology, Inselspital University Hospital, 3010 Bern, Switzerland
- Department of Surgery, Harvard Medical School, Boston, MA, USA
- Broad Institute of MIT and Harvard, Cambridge, MA, USA
| | - Bryan S Sack
- Urological Diseases Research Center, Boston Children's Hospital, Boston, MA, USA
- Functional Urology Research Group, Department for BioMedical Research DBMR, University of Bern, Switzerland
| | - Alex Bigger-Allen
- Urological Diseases Research Center, Boston Children's Hospital, Boston, MA, USA
- Department of Surgery, Harvard Medical School, Boston, MA, USA
- Broad Institute of MIT and Harvard, Cambridge, MA, USA
- Biological & Biomedical Sciences Graduate Program, Division of Medical Sciences, Harvard Medical School, Boston, MA
| | - Hatim Thaker
- Urological Diseases Research Center, Boston Children's Hospital, Boston, MA, USA
- Department of Surgery, Harvard Medical School, Boston, MA, USA
| | - Hussein Atta
- Urological Diseases Research Center, Boston Children's Hospital, Boston, MA, USA
- Department of Surgery, Harvard Medical School, Boston, MA, USA
| | - George Lambrinos
- Urological Diseases Research Center, Boston Children's Hospital, Boston, MA, USA
- Department of Surgery, Harvard Medical School, Boston, MA, USA
| | - Kyle Costa
- Urological Diseases Research Center, Boston Children's Hospital, Boston, MA, USA
| | - Claire Doyle
- Urological Diseases Research Center, Boston Children's Hospital, Boston, MA, USA
- Department of Surgery, Harvard Medical School, Boston, MA, USA
| | | | | | - Mary Piper
- Harvard Chan Bioinformatics Core, Harvard T.H. Chan School of Public Health, Boston, MA, USA
| | - Justin F Cotellessa
- Departments of Surgery and Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, CA
| | - Dijana Vitko
- Urological Diseases Research Center, Boston Children's Hospital, Boston, MA, USA
- Department of Surgery, Harvard Medical School, Boston, MA, USA
| | - Haiying Li
- Urological Diseases Research Center, Boston Children's Hospital, Boston, MA, USA
- Department of Surgery, Harvard Medical School, Boston, MA, USA
| | - Manubhai Kadayil Prabhakaran
- Urological Diseases Research Center, Boston Children's Hospital, Boston, MA, USA
- Department of Surgery, Harvard Medical School, Boston, MA, USA
| | - Vivian Cristofaro
- Division of Urology, VA Boston Healthcare System, Boston, MA, USA
- University of Massachusetts, Boston, MA, USA
| | - John Froehlich
- Urological Diseases Research Center, Boston Children's Hospital, Boston, MA, USA
- Department of Surgery, Harvard Medical School, Boston, MA, USA
| | - Richard S Lee
- Urological Diseases Research Center, Boston Children's Hospital, Boston, MA, USA
- Department of Surgery, Harvard Medical School, Boston, MA, USA
| | - Wei Yang
- Departments of Surgery and Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, CA
| | - Maryrose P Sullivan
- Division of Urology, VA Boston Healthcare System, Boston, MA, USA
- University of Massachusetts, Boston, MA, USA
| | | | - Rosalyn M Adam
- Urological Diseases Research Center, Boston Children's Hospital, Boston, MA, USA
- Department of Urology, Inselspital University Hospital, 3010 Bern, Switzerland
- Department of Surgery, Harvard Medical School, Boston, MA, USA
- Broad Institute of MIT and Harvard, Cambridge, MA, USA
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2
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Gundogdu G, Nguyen T, Hosseini Sharifi SH, Starek S, Costa K, Jones CE, Barham D, Gelman J, Clayman RV, Mauney JR. Evaluation of silk fibroin-based urinary conduits in a porcine model of urinary diversion. Front Bioeng Biotechnol 2023; 11:1100507. [PMID: 36726743 PMCID: PMC9885082 DOI: 10.3389/fbioe.2023.1100507] [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] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Accepted: 01/03/2023] [Indexed: 01/17/2023] Open
Abstract
Background: The primary strategy for urinary diversion in radical cystectomy patients involves incorporation of autologous gastrointestinal conduits into the urinary tract which leads to deleterious consequences including chronic infections and metabolic abnormalities. This report investigates the efficacy of an acellular, tubular bi-layer silk fibroin (BLSF) graft to function as an alternative urinary conduit in a porcine model of urinary diversion. Materials and methods: Unilateral urinary diversion with stented BLSF conduits was executed in five adult female, Yucatan mini-swine over a 3 month period. Longitudinal imaging analyses including ultrasonography, retrograde ureteropyelography and video-endoscopy were carried out monthly. Histological, immunohistochemical (IHC), and histomorphometric assessments were performed on neoconduits at harvest. Results: All animals survived until scheduled euthanasia and displayed moderate hydronephrosis (Grades 1-3) in reconstructed collecting systems over the course of the study period. Stented BLSF constructs supported formation of vascularized, retroperitoneal tubes capable of facilitating external urinary drainage. By 3 months post-operative, neoconduits contained α-smooth muscle actin+ and SM22α+ smooth muscle as well as uroplakin 3A+ and pan-cytokeratin + urothelium. However, the degree of tissue regeneration in neotissues was significantly lower in comparison to ureteral controls as determined by histomorphometry. In addition, neoconduit stenting was necessary to prevent stomal occlusion. Conclusion: BLSF biomaterials represent emerging platforms for urinary conduit construction and may offer a functional replacement for conventional urinary diversion techniques following further optimization of mechanical properties and regenerative responses.
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Affiliation(s)
- Gokhan Gundogdu
- Department of Urology, University of California, Irvine, Orange, CA, United States
| | - Travis Nguyen
- Department of Biomedical Engineering, University of California, Irvine, Irvine, CA, United States
| | | | - Stephanie Starek
- Department of Urology, University of California, Irvine, Orange, CA, United States
| | - Kyle Costa
- Department of Urology, University of California, Irvine, Orange, CA, United States
| | - Clara E. Jones
- Department of Biomedical Engineering, University of California, Irvine, Irvine, CA, United States
| | - David Barham
- Department of Urology, University of California, Irvine, Orange, CA, United States
| | - Joel Gelman
- Department of Urology, University of California, Irvine, Orange, CA, United States
| | - Ralph V. Clayman
- Department of Urology, University of California, Irvine, Orange, CA, United States
| | - Joshua R. Mauney
- Department of Urology, University of California, Irvine, Orange, CA, United States,Department of Biomedical Engineering, University of California, Irvine, Irvine, CA, United States,*Correspondence: Joshua R. Mauney,
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3
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Arriaza-Gallardo FJ, Schaupp S, Zheng YC, Abdul-Halim MF, Hui-Jie P, Kahnt J, Angelidou G, Paczia N, Hu X, Costa K, Shima S. The Function of Two Radical‐SAM Enzymes, HcgA and HcgG, in the Biosynthesis of the [Fe]‐Hydrogenase Cofactor. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202213239] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Francisco J. Arriaza-Gallardo
- Max Planck Institute for Terrestrial Microbiology: Max-Planck-Institut fur terrestrische Mikrobiologie Microbial Protein Structure GERMANY
| | - Sebastian Schaupp
- Max Planck Institute for Terrestrial Microbiology: Max-Planck-Institut fur terrestrische Mikrobiologie Microbial Protein Structure GERMANY
| | - Yu-Cong Zheng
- Max Planck Institute for Terrestrial Microbiology: Max-Planck-Institut fur terrestrische Mikrobiologie Microbial Protein Structure GERMANY
| | - Mohd Farid Abdul-Halim
- University of Minnesota Twin Cities: University of Minnesota Plant and Microbial Biology UNITED STATES
| | - Pan Hui-Jie
- École Polytechnique Fédérale de Lausanne: Ecole Polytechnique Federale de Lausanne Laboratory of Inorganic Synthesis and Catalysis SWITZERLAND
| | - Jörg Kahnt
- Max Planck Institute for Terrestrial Microbiology: Max-Planck-Institut fur terrestrische Mikrobiologie Core Facility for Mass spectrometry & Proteomics GERMANY
| | - Georgia Angelidou
- Max Planck Institute for Terrestrial Microbiology: Max-Planck-Institut fur terrestrische Mikrobiologie Core Facility for Metabolomics and small molecules MS GERMANY
| | - Nicole Paczia
- Max Planck Institute for Terrestrial Microbiology: Max-Planck-Institut fur terrestrische Mikrobiologie Core Facility for Metabolomics and small molecules MS GERMANY
| | - Xile Hu
- École Polytechnique Fédérale de Lausanne: Ecole Polytechnique Federale de Lausanne Laboratory of Inorganic Synthesis and Catalysis SWITZERLAND
| | - Kyle Costa
- University of Minnesota Twin Cities: University of Minnesota Plant and Microbial Biology UNITED STATES
| | - Seigo Shima
- Max Planck Institute for Terrestrial Microbiology: Max-Planck-Institut fur terrestrische Mikrobiologie Microbial Protein Structure Karl-von-Frisch Strasse 10 35043 Marburg GERMANY
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Arriaza-Gallardo FJ, Schaupp S, Zheng YC, Abdul-Halim MF, Hui-Jie P, Kahnt J, Angelidou G, Paczia N, Hu X, Costa K, Shima S. The Function of Two Radical‐SAM Enzymes, HcgA and HcgG, in the Biosynthesis of the [Fe]‐Hydrogenase Cofactor. Angew Chem Int Ed Engl 2022; 61:e202213239. [PMID: 36264001 PMCID: PMC10100467 DOI: 10.1002/anie.202213239] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Indexed: 11/05/2022]
Abstract
In the biosynthesis of the iron-guanylylpyridinol (FeGP) cofactor, 6-carboxymethyl-5-methyl-4-hydroxy-2-pyridinol (1) is 3-methylated to form 2, then 4-guanylylated to form 3, and converted into the full cofactor. HcgA-G proteins catalyze the biosynthetic reactions. Herein, we report the function of two radical S-adenosyl methionine enzymes, HcgA and HcgG, as uncovered by in vitro complementation experiments and the use of purified enzymes. In vitro biosynthesis using the cell extract from the Methanococcus maripaludis ΔhcgA strain was complemented with HcgA or precursors 1, 2 or 3. The results suggested that HcgA catalyzes the biosynthetic reaction that forms 1. We demonstrated the formation of 1 by HcgA using the 3 kDa cell extract filtrate as the substrate. Biosynthesis in the ΔhcgG system was recovered by HcgG but not by 3, which indicated that HcgG catalyzes the reactions after the biosynthesis of 3. The data indicated that HcgG contributes to the formation of CO and completes biosynthesis of the FeGP cofactor.
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Affiliation(s)
- Francisco J. Arriaza-Gallardo
- Max Planck Institute for Terrestrial Microbiology: Max-Planck-Institut fur terrestrische Mikrobiologie Microbial Protein Structure GERMANY
| | - Sebastian Schaupp
- Max Planck Institute for Terrestrial Microbiology: Max-Planck-Institut fur terrestrische Mikrobiologie Microbial Protein Structure GERMANY
| | - Yu-Cong Zheng
- Max Planck Institute for Terrestrial Microbiology: Max-Planck-Institut fur terrestrische Mikrobiologie Microbial Protein Structure GERMANY
| | - Mohd Farid Abdul-Halim
- University of Minnesota Twin Cities: University of Minnesota Plant and Microbial Biology UNITED STATES
| | - Pan Hui-Jie
- École Polytechnique Fédérale de Lausanne: Ecole Polytechnique Federale de Lausanne Laboratory of Inorganic Synthesis and Catalysis SWITZERLAND
| | - Jörg Kahnt
- Max Planck Institute for Terrestrial Microbiology: Max-Planck-Institut fur terrestrische Mikrobiologie Core Facility for Mass spectrometry & Proteomics GERMANY
| | - Georgia Angelidou
- Max Planck Institute for Terrestrial Microbiology: Max-Planck-Institut fur terrestrische Mikrobiologie Core Facility for Metabolomics and small molecules MS GERMANY
| | - Nicole Paczia
- Max Planck Institute for Terrestrial Microbiology: Max-Planck-Institut fur terrestrische Mikrobiologie Core Facility for Metabolomics and small molecules MS GERMANY
| | - Xile Hu
- École Polytechnique Fédérale de Lausanne: Ecole Polytechnique Federale de Lausanne Laboratory of Inorganic Synthesis and Catalysis SWITZERLAND
| | - Kyle Costa
- University of Minnesota Twin Cities: University of Minnesota Plant and Microbial Biology UNITED STATES
| | - Seigo Shima
- Max Planck Institute for Terrestrial Microbiology: Max-Planck-Institut fur terrestrische Mikrobiologie Microbial Protein Structure Karl-von-Frisch Strasse 10 35043 Marburg GERMANY
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Schaupp S, Arriaza-Gallardo FJ, Pan HJ, Kahnt J, Angelidou G, Paczia N, Costa K, Hu X, Shima S. In Vitro Biosynthesis of the [Fe]-Hydrogenase Cofactor Verifies the Proposed Biosynthetic Precursors. Angew Chem Int Ed Engl 2022; 61:e202200994. [PMID: 35286742 PMCID: PMC9314073 DOI: 10.1002/anie.202200994] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [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: 01/19/2022] [Indexed: 02/06/2023]
Abstract
In the FeGP cofactor of [Fe]‐hydrogenase, low‐spin FeII is in complex with two CO ligands and a pyridinol derivative; the latter ligates the iron with a 6‐acylmethyl substituent and the pyridinol nitrogen. A guanylylpyridinol derivative, 6‐carboxymethyl‐3,5‐dimethyl‐4‐guanylyl‐2‐pyridinol (3), is produced by the decomposition of the FeGP cofactor under irradiation with UV‐A/blue light and is also postulated to be a precursor of FeGP cofactor biosynthesis. HcgC and HcgB catalyze consecutive biosynthesis steps leading to 3. Here, we report an in vitro biosynthesis assay of the FeGP cofactor using the cell extract of the ΔhcgBΔhcgC strain of Methanococcus maripaludis, which does not biosynthesize 3. We chemically synthesized pyridinol precursors 1 and 2, and detected the production of the FeGP cofactor from 1, 2 and 3. These results indicated that 1, 2 and 3 are the precursors of the FeGP cofactor, and the carboxy group of 3 is converted to the acyl ligand.
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Affiliation(s)
- Sebastian Schaupp
- Max Planck Institute for Terrestrial Microbiology, Karl-von-Frisch-Straße 10, 35043, Marburg, Germany
| | | | - Hui-Jie Pan
- Laboratory of Inorganic Synthesis and Catalysis, Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne (EPFL) ISIC-LSCI, BCH 3305, 1015, Lausanne, Switzerland
| | - Jörg Kahnt
- Max Planck Institute for Terrestrial Microbiology, Karl-von-Frisch-Straße 10, 35043, Marburg, Germany
| | - Georgia Angelidou
- Max Planck Institute for Terrestrial Microbiology, Karl-von-Frisch-Straße 10, 35043, Marburg, Germany
| | - Nicole Paczia
- Max Planck Institute for Terrestrial Microbiology, Karl-von-Frisch-Straße 10, 35043, Marburg, Germany
| | - Kyle Costa
- Department of Plant and Microbial Biology, University of Minnesota, Twin Cities, St. Paul, MN, USA
| | - Xile Hu
- Laboratory of Inorganic Synthesis and Catalysis, Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne (EPFL) ISIC-LSCI, BCH 3305, 1015, Lausanne, Switzerland
| | - Seigo Shima
- Max Planck Institute for Terrestrial Microbiology, Karl-von-Frisch-Straße 10, 35043, Marburg, Germany
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Schaupp S, Arriaza‐Gallardo FJ, Pan H, Kahnt J, Angelidou G, Paczia N, Costa K, Hu X, Shima S. In Vitro Biosynthesis of the [Fe]‐Hydrogenase Cofactor Verifies the Proposed Biosynthetic Precursors. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202200994] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Sebastian Schaupp
- Max Planck Institute for Terrestrial Microbiology Karl-von-Frisch-Straße 10 35043 Marburg Germany
| | | | - Hui‐jie Pan
- Laboratory of Inorganic Synthesis and Catalysis Institute of Chemical Sciences and Engineering Ecole Polytechnique Fédérale de Lausanne (EPFL) ISIC-LSCI, BCH 3305 1015 Lausanne Switzerland
| | - Jörg Kahnt
- Max Planck Institute for Terrestrial Microbiology Karl-von-Frisch-Straße 10 35043 Marburg Germany
| | - Georgia Angelidou
- Max Planck Institute for Terrestrial Microbiology Karl-von-Frisch-Straße 10 35043 Marburg Germany
| | - Nicole Paczia
- Max Planck Institute for Terrestrial Microbiology Karl-von-Frisch-Straße 10 35043 Marburg Germany
| | - Kyle Costa
- Department of Plant and Microbial Biology University of Minnesota Twin Cities St. Paul, MN USA
| | - Xile Hu
- Laboratory of Inorganic Synthesis and Catalysis Institute of Chemical Sciences and Engineering Ecole Polytechnique Fédérale de Lausanne (EPFL) ISIC-LSCI, BCH 3305 1015 Lausanne Switzerland
| | - Seigo Shima
- Max Planck Institute for Terrestrial Microbiology Karl-von-Frisch-Straße 10 35043 Marburg Germany
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Gundogdu G, Tosun M, Morhardt D, Gheinani AH, Algarrahi K, Yang X, Costa K, Alegria CG, Adam RM, Yang W, Mauney JR. Molecular mechanisms of esophageal epithelial regeneration following repair of surgical defects with acellular silk fibroin grafts. Sci Rep 2021; 11:7086. [PMID: 33782465 PMCID: PMC8007829 DOI: 10.1038/s41598-021-86511-9] [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] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2020] [Accepted: 03/16/2021] [Indexed: 12/11/2022] Open
Abstract
Constructive remodeling of focal esophageal defects with biodegradable acellular grafts relies on the ability of host progenitor cell populations to repopulate implant regions and facilitate growth of de novo functional tissue. Intrinsic molecular mechanisms governing esophageal repair processes following biomaterial-based, surgical reconstruction is largely unknown. In the present study, we utilized mass spectrometry-based quantitative proteomics and in silico pathway evaluations to identify signaling cascades which were significantly activated during neoepithelial formation in a Sprague Dawley rat model of onlay esophagoplasty with acellular silk fibroin scaffolds. Pharmacologic inhibitor and rescue experiments revealed that epithelialization of neotissues is significantly dependent in part on pro-survival stimuli capable of suppressing caspase activity in epithelial progenitors via activation of hepatocyte growth factor receptor (c-MET), tropomyosin receptor kinase A (TrkA), phosphoinositide 3-kinase (PI3K), and protein kinase B (Akt) signaling mechanisms. These data highlight the molecular machinery involved in esophageal epithelial regeneration following surgical repair with acellular implants.
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Affiliation(s)
- Gokhan Gundogdu
- Departments of Urology and Biomedical Engineering, University of California, Irvine, Orange, CA, 92868, USA
| | - Mehmet Tosun
- Departments of Urology and Biomedical Engineering, University of California, Irvine, Orange, CA, 92868, USA
| | - Duncan Morhardt
- Urological Diseases Research Center, Boston Children's Hospital, Boston, MA, 02115, USA
- Department of Surgery, Harvard Medical School, Boston, MA, 02115, USA
| | - Ali Hashemi Gheinani
- Urological Diseases Research Center, Boston Children's Hospital, Boston, MA, 02115, USA
- Department of Surgery, Harvard Medical School, Boston, MA, 02115, USA
- Broad Institute of the Massachusetts Institute of Technology and Harvard University, Cambridge, MA, 02142, USA
| | - Khalid Algarrahi
- Urological Diseases Research Center, Boston Children's Hospital, Boston, MA, 02115, USA
- Department of Surgery, Harvard Medical School, Boston, MA, 02115, USA
| | - Xuehui Yang
- Urological Diseases Research Center, Boston Children's Hospital, Boston, MA, 02115, USA
- Department of Surgery, Harvard Medical School, Boston, MA, 02115, USA
| | - Kyle Costa
- Urological Diseases Research Center, Boston Children's Hospital, Boston, MA, 02115, USA
- Department of Surgery, Harvard Medical School, Boston, MA, 02115, USA
| | - Cinthia Galvez Alegria
- Urological Diseases Research Center, Boston Children's Hospital, Boston, MA, 02115, USA
- Department of Surgery, Harvard Medical School, Boston, MA, 02115, USA
| | - Rosalyn M Adam
- Urological Diseases Research Center, Boston Children's Hospital, Boston, MA, 02115, USA
- Department of Surgery, Harvard Medical School, Boston, MA, 02115, USA
- Broad Institute of the Massachusetts Institute of Technology and Harvard University, Cambridge, MA, 02142, USA
| | - Wei Yang
- Division of Cancer Biology and Therapeutics, Departments of Surgery and Biomedical Sciences, Samuel Oschin Comprehensive Cancer Institute, Cedars-Sinai Medical Center, Los Angeles, CA, 90048, USA
- Department of Medicine, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Joshua R Mauney
- Departments of Urology and Biomedical Engineering, University of California, Irvine, Orange, CA, 92868, USA.
- Departments of Urology and Biomedical Engineering, University of California, Irvine, Building 55, 101 The City Drive South., Rm. 300, Orange, CA, 92868, USA.
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Gundogdu G, Morhardt D, Cristofaro V, Algarrahi K, Yang X, Costa K, Alegria CG, Sullivan MP, Mauney JR. Evaluation of Bilayer Silk Fibroin Grafts for Tubular Esophagoplasty in a Porcine Defect Model. Tissue Eng Part A 2021; 27:103-116. [PMID: 32460641 PMCID: PMC7826443 DOI: 10.1089/ten.tea.2020.0061] [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] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2020] [Accepted: 05/19/2020] [Indexed: 12/14/2022] Open
Abstract
Surgical reconstruction of tubular esophageal defects with autologous gastrointestinal segments is the gold standard treatment to replace damaged or diseased esophageal tissues. Unfortunately, this approach is associated with adverse complications, including dysphagia, donor-site morbidity, and in some cases patient death. Bilayer silk fibroin (BLSF) scaffolds were investigated as alternative, acellular grafts for tubular esophagoplasty in a porcine defect model for 3 months of implantation. Adult Yucatan mini-swine (n = 5) were subjected to esophageal reconstruction with tubular BLSF grafts (2 cm in length) in combination with transient esophageal stenting for 2 months followed by a 1-month period, where the graft site was unstented. All animals receiving BLSF grafts survived and were capable of solid food consumption, however strictures were noted at graft regions in 60% of the experimental cohort between 2 and 3 months postop and required balloon dilation. In addition, fluoroscopic analysis showed peristaltic function in only 1/5 neotissues. Following swine harvest at 3 months, ex vivo tissue bath evaluations revealed that neoconduits exhibited contractile responses to carbachol, electric field stimulation, and KCl, whereas sodium nitroprusside and isoproterenol induced relaxation effects. Histological (Masson's Trichrome) and immunohistochemical analyses of regenerated tissue conduits showed a stratified, squamous epithelium expressing pan-cytokeratins buttressed by a vascularized lamina propria containing a smooth muscle-rich muscularis mucosa surrounded by a muscularis externa. Neuronal density, characterized by the presence of synaptophysin-positive boutons, was significantly lower in neotissues in comparison to nonsurgical controls. BLSF scaffolds represent a promising platform for the repair of tubular esophageal defects, however improvements in scaffold design are needed to reduce the rate of complications and improve the extent of constructive tissue remodeling. Impact statement The search for a superior "off-the-shelf" scaffold capable of repairing tubularesophageal defects as well as overcoming limitations associated with conventional autologous gastrointestinal segments remains elusive. The purpose of this study was to investigate the performance of an acellular, bilayer silk fibroin graft (BLSF) for tubular esophagoplasty in a porcine model. Our results demonstrated that BLSF scaffolds supported the formation of tubular neotissues with innervated, vascularized epithelial and muscular components capable of contractile and relaxation responses. BLSF scaffolds represent a promising platform for esophageal tissue engineering.
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Affiliation(s)
- Gokhan Gundogdu
- Departments of Urology and Biomedical Engineering, University of California, Irvine, Orange, California, USA
| | - Duncan Morhardt
- Urological Diseases Research Center, Boston Children's Hospital, Boston, Massachusetts, USA
- Department of Surgery, Harvard Medical School, Boston, Massachusetts, USA
| | - Vivian Cristofaro
- Department of Surgery, Harvard Medical School, Boston, Massachusetts, USA
- Division of Urology, Veterans Affairs Boston Healthcare System, Boston, Massachusetts, USA
- Department of Surgery, Brigham and Women's Hospital, Boston, Massachusetts, USA
| | - Khalid Algarrahi
- Urological Diseases Research Center, Boston Children's Hospital, Boston, Massachusetts, USA
- Department of Surgery, Harvard Medical School, Boston, Massachusetts, USA
| | - Xuehui Yang
- Urological Diseases Research Center, Boston Children's Hospital, Boston, Massachusetts, USA
- Department of Surgery, Harvard Medical School, Boston, Massachusetts, USA
| | - Kyle Costa
- Urological Diseases Research Center, Boston Children's Hospital, Boston, Massachusetts, USA
- Department of Surgery, Harvard Medical School, Boston, Massachusetts, USA
| | - Cinthia Galvez Alegria
- Urological Diseases Research Center, Boston Children's Hospital, Boston, Massachusetts, USA
- Department of Surgery, Harvard Medical School, Boston, Massachusetts, USA
| | - Maryrose P. Sullivan
- Department of Surgery, Harvard Medical School, Boston, Massachusetts, USA
- Division of Urology, Veterans Affairs Boston Healthcare System, Boston, Massachusetts, USA
- Department of Surgery, Brigham and Women's Hospital, Boston, Massachusetts, USA
| | - Joshua R. Mauney
- Departments of Urology and Biomedical Engineering, University of California, Irvine, Orange, California, USA
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Faquim J, Macedo J, Oliveira J, Machado S, Ivancko G, Costa K, Alves M, Oliveira T. Profile of incarcerated women in the interior of Brazil and the challenge of education in prison. Eur J Public Health 2020. [DOI: 10.1093/eurpub/ckaa166.1260] [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] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
According to the Ministry of Justice and Public Security, Brazil is fourth in the world position in relation to the absolute size of female prison population, with 42.000 women deprived of freedom (2016), behind the United States, China and Russia. Around 50% are young (< 29 years old), 62% are black and 66% have not yet attended high school. This study aimed to characterize the profile of women incarcerated in a penitentiary in the interior of Brazil, through the survey of sociodemographic data, education, health, legal and life expectations. This is a descriptive and exploratory study conducted with 68 women (20 to 67 years old) in 2019 and 2020. Most women declared themselves black or brown (56%), incomplete elementary school (42%), have work experience (73%). Around 69% reported needing health treatment and 76% have already used psychoactive substances including alcohol, cigarettes, marijuana, cocaine or crack. The main reasons that led to the arrest were drug trafficking (54%) and theft (26%) and the majority (53%) are repeat offenders in prison system. Regarding the biggest dream of life, the main answers were related to family life (44%), having a job (26%) and access to education (20%). With these results, an extension project was proposed to offer a professional qualification in vegetable gardens, aromatic and medicinal plants for women prisoners. In addition to professional qualification, the project is dedicated to promoting debates on map of life, ethics, human relations, citizenship, gender, women's rights and health, quality of life, body and verbal expression, digital inclusion, food and nutrition security, entrepreneurship, cooperativism, solidary economy, rights and duties of the worker, aiming at better employment conditions. This research contributed to articulate actions between university and society, empower women through access to education and allowed the work team to develop competencies related to collaborative work and interdisciplinarity.
Key messages
This study aimed to characterize the profile of women incarcerated in a penitentiary in Brazil, through the survey of sociodemographic data, education, health, legal and life expectations. This research contributed to articulate actions between university-society, empower incarcerated women through access to education and allowed the work team collaborative and interdisciplinarity work.
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Affiliation(s)
- J Faquim
- Technical School of Health, Federal University of Uberlândia, Uberlândia-MG, Brazil
| | - J Macedo
- Law School, Pitágoras University, Uberlândia-MG, Brazil
| | - J Oliveira
- Technical School of Health, Federal University of Uberlândia, Uberlândia-MG, Brazil
| | - S Machado
- Faculty of Business and Management, Federal University of Uberlândia, Uberlândia-MG, Brazil
| | - G Ivancko
- Faculty of Environmental Management, Federal University of Uberlândia, Uberlândia-MG, Brazil
| | - K Costa
- Faculty of Geography, Federal University of Uberlândia, Uberlândia-MG, Brazil
| | - M Alves
- Law School, Pitágoras University, Uberlândia-MG, Brazil
| | - T Oliveira
- Faculty of Nutrition, Federal University of Uberlândia, Uberlândia-MG, Brazil
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Redor A, Baeke A, Costa K, Bertrand K, Saada M, Aumaitre H. Cutaneous digital tuberculosis in immunocompetent host. IDCases 2019; 18:e00501. [PMID: 31886128 PMCID: PMC6921141 DOI: 10.1016/j.idcr.2019.e00501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2019] [Revised: 01/16/2019] [Accepted: 01/30/2019] [Indexed: 11/12/2022] Open
Affiliation(s)
- A Redor
- Infectious Diseases and Tropical Medicine Department, Centre Hospitalier Saint-Jean, Perpignan, France
| | - A Baeke
- Dermatology Department, Centre Hospitalier Saint-Jean, Perpignan, France
| | - K Costa
- Department of Pathology, Centre Hospitalier Saint-Jean, Perpignan, France
| | - K Bertrand
- Infectious Diseases and Tropical Medicine Department, Centre Hospitalier Saint-Jean, Perpignan, France
| | - M Saada
- Infectious Diseases and Tropical Medicine Department, Centre Hospitalier Saint-Jean, Perpignan, France
| | - H Aumaitre
- Infectious Diseases and Tropical Medicine Department, Centre Hospitalier Saint-Jean, Perpignan, France
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Affas S, Schäfer FM, Algarrahi K, Cristofaro V, Sullivan MP, Yang X, Costa K, Sack B, Gharaee-Kermani M, Macoska JA, Gundogdu G, Seager C, Estrada CR, Mauney JR. Augmentation Cystoplasty of Diseased Porcine Bladders with Bi-Layer Silk Fibroin Grafts. Tissue Eng Part A 2018; 25:855-866. [PMID: 30191762 DOI: 10.1089/ten.tea.2018.0113] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
Abstract
IMPACT STATEMENT The search for an ideal "off-the-shelf" biomaterial for augmentation cystoplasty remains elusive and current scaffold configurations are hampered by mechanical and biocompatibility restrictions. In addition, preclinical evaluations of potential scaffold designs for bladder repair are limited by the lack of tractable large animal models of obstructive bladder disease that can mimic clinical pathology. The results of this study describe a novel, minimally invasive, porcine model of partial bladder outlet obstruction that simulates clinically relevant phenotypes. Utilizing this model, we demonstrate that acellular, bi-layer silk fibroin grafts can support the formation of vascularized, innervated bladder tissues with functional properties.
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Affiliation(s)
- Saif Affas
- 1 Department of Urology, John F. Enders Research Laboratories, Boston Children's Hospital, Boston, Massachusetts.,2 Department of Surgery, Harvard Medical School, Boston, Massachusetts
| | - Frank-Mattias Schäfer
- 1 Department of Urology, John F. Enders Research Laboratories, Boston Children's Hospital, Boston, Massachusetts
| | - Khalid Algarrahi
- 1 Department of Urology, John F. Enders Research Laboratories, Boston Children's Hospital, Boston, Massachusetts.,2 Department of Surgery, Harvard Medical School, Boston, Massachusetts
| | - Vivian Cristofaro
- 3 Division of Urology, Veterans Affairs Boston Healthcare System, West Roxbury, Massachusetts.,4 Department of Surgery, Brigham and Women's Hospital, Boston, Massachusetts
| | - Maryrose P Sullivan
- 3 Division of Urology, Veterans Affairs Boston Healthcare System, West Roxbury, Massachusetts.,4 Department of Surgery, Brigham and Women's Hospital, Boston, Massachusetts
| | - Xuehui Yang
- 1 Department of Urology, John F. Enders Research Laboratories, Boston Children's Hospital, Boston, Massachusetts
| | - Kyle Costa
- 1 Department of Urology, John F. Enders Research Laboratories, Boston Children's Hospital, Boston, Massachusetts
| | - Bryan Sack
- 1 Department of Urology, John F. Enders Research Laboratories, Boston Children's Hospital, Boston, Massachusetts.,2 Department of Surgery, Harvard Medical School, Boston, Massachusetts
| | - Mehrnaz Gharaee-Kermani
- 5 Department of Biological Sciences, Center for Personalized Cancer Therapy, The University of Massachusetts, Boston, Massachusetts
| | - Jill A Macoska
- 5 Department of Biological Sciences, Center for Personalized Cancer Therapy, The University of Massachusetts, Boston, Massachusetts
| | - Gokhan Gundogdu
- 1 Department of Urology, John F. Enders Research Laboratories, Boston Children's Hospital, Boston, Massachusetts.,2 Department of Surgery, Harvard Medical School, Boston, Massachusetts
| | - Catherine Seager
- 1 Department of Urology, John F. Enders Research Laboratories, Boston Children's Hospital, Boston, Massachusetts.,2 Department of Surgery, Harvard Medical School, Boston, Massachusetts
| | - Carlos R Estrada
- 1 Department of Urology, John F. Enders Research Laboratories, Boston Children's Hospital, Boston, Massachusetts.,2 Department of Surgery, Harvard Medical School, Boston, Massachusetts
| | - Joshua R Mauney
- 1 Department of Urology, John F. Enders Research Laboratories, Boston Children's Hospital, Boston, Massachusetts.,2 Department of Surgery, Harvard Medical School, Boston, Massachusetts
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Galvez Alegria C, Gundogdu G, Yang X, Costa K, Mauney JR. Evaluation of Acellular Bilayer Silk Fibroin Grafts for Onlay Tracheoplasty in a Rat Defect Model. Otolaryngol Head Neck Surg 2018; 160:310-319. [PMID: 30274546 DOI: 10.1177/0194599818802267] [Citation(s) in RCA: 3] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
OBJECTIVE To assess the efficacy of acellular bilayer silk fibroin (BLSF) grafts to repair full-thickness tracheal defects and to compare the performance with conventional porcine small intestinal submucosa (SIS) implants. STUDY DESIGN A prospective controlled animal trial in a rat model of onlay tracheoplasty. SETTING Pediatric medical center. SUBJECTS AND METHODS Tracheal reconstruction of adult Sprague-Dawley rats was performed with BLSF (n = 38) or SIS (n = 32) matrices for up to 3 months of implantation. Functional evaluations of repaired conduits as well as histologic, immunohistochemical, and histomorphometric analyses of neotissues were assessed. RESULTS Prior to scheduled euthanasia, survival rates of rats receiving BLSF or SIS grafts were ≥94%, with no clinical signs of airway obstruction observed over the course of the study. Micro-computed tomography analysis revealed that the mean percentage of stenosis was <20% in both implant groups. BLSF and SIS grafts supported formation of pseudostratified ciliated columnar epithelium by 1 week postoperatively; however, each matrix failed to promote de novo chondrogenesis by 3 months following repair. CONCLUSIONS BLSF scaffolds can be used for reconstruction of rat tracheal patch defects with functional outcomes comparable to those of SIS matrices.
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Affiliation(s)
- Cinthia Galvez Alegria
- 1 Urological Diseases Research Center, Boston Children's Hospital, Boston, Massachusetts, USA.,2 Department of Surgery, Harvard Medical School, Boston, Massachusetts, USA
| | - Gokhan Gundogdu
- 1 Urological Diseases Research Center, Boston Children's Hospital, Boston, Massachusetts, USA.,2 Department of Surgery, Harvard Medical School, Boston, Massachusetts, USA
| | - Xuehui Yang
- 1 Urological Diseases Research Center, Boston Children's Hospital, Boston, Massachusetts, USA.,2 Department of Surgery, Harvard Medical School, Boston, Massachusetts, USA
| | - Kyle Costa
- 1 Urological Diseases Research Center, Boston Children's Hospital, Boston, Massachusetts, USA.,2 Department of Surgery, Harvard Medical School, Boston, Massachusetts, USA
| | - Joshua R Mauney
- 1 Urological Diseases Research Center, Boston Children's Hospital, Boston, Massachusetts, USA.,2 Department of Surgery, Harvard Medical School, Boston, Massachusetts, USA
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Oliveira J, Costa K, Acurcio L, Sandes S, Cassali G, Uetanabaro A, Costa A, Nicoli J, Neumann E, Porto A. In vitro and in vivo evaluation of two potential probiotic lactobacilli isolated from cocoa fermentation (Theobroma cacao L.). J Funct Foods 2018. [DOI: 10.1016/j.jff.2018.05.055] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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Chauvet E, Blanche B, Aptel S, Costa K, Pallure V. Sarcoïdose osseuse axiale : étude 3 observations. Rev Med Interne 2017. [DOI: 10.1016/j.revmed.2017.10.045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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15
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Schäfer FM, Algarrahi K, Savarino A, Yang X, Seager C, Franck D, Costa K, Liu S, Logvinenko T, Adam R, Mauney JR. Mode of Surgical Injury Influences the Source of Urothelial Progenitors during Bladder Defect Repair. Stem Cell Reports 2017; 9:2005-2017. [PMID: 29173895 PMCID: PMC5785709 DOI: 10.1016/j.stemcr.2017.10.025] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [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: 04/11/2017] [Revised: 10/26/2017] [Accepted: 10/27/2017] [Indexed: 12/30/2022] Open
Abstract
The bladder urothelium functions as a urine-blood barrier and consists of basal, intermediate, and superficial cell populations. Reconstructive procedures such as augmentation cystoplasty and focal mucosal resection involve localized surgical damage to the bladder wall whereby focal segments of the urothelium and underlying submucosa are respectively removed or replaced and regeneration ensues. We demonstrate using lineage-tracing systems that urothelial regeneration following augmentation cystoplasty with acellular grafts exclusively depends on host keratin 5-expressing basal cells to repopulate all lineages of the de novo urothelium at implant sites. Conversely, repair of focal mucosal defects not only employs this mechanism, but in parallel host intermediate cell daughters expressing uroplakin 2 give rise to themselves and are also contributors to superficial cells in neotissues. These results highlight the diversity of urothelial regenerative responses to surgical injury and may lead to advancements in bladder tissue engineering approaches.
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Affiliation(s)
- Frank-Mattias Schäfer
- Urological Diseases Research Center, Boston Children's Hospital, Boston, MA 02115, USA; Department of Surgery, Harvard Medical School, Boston, MA 02115, USA
| | - Khalid Algarrahi
- Urological Diseases Research Center, Boston Children's Hospital, Boston, MA 02115, USA; Department of Surgery, Harvard Medical School, Boston, MA 02115, USA
| | - Alyssa Savarino
- Urological Diseases Research Center, Boston Children's Hospital, Boston, MA 02115, USA; Department of Surgery, Harvard Medical School, Boston, MA 02115, USA
| | - Xuehui Yang
- Urological Diseases Research Center, Boston Children's Hospital, Boston, MA 02115, USA; Department of Surgery, Harvard Medical School, Boston, MA 02115, USA
| | - Catherine Seager
- Urological Diseases Research Center, Boston Children's Hospital, Boston, MA 02115, USA; Department of Surgery, Harvard Medical School, Boston, MA 02115, USA
| | - Debra Franck
- Urological Diseases Research Center, Boston Children's Hospital, Boston, MA 02115, USA; Department of Surgery, Harvard Medical School, Boston, MA 02115, USA
| | - Kyle Costa
- Urological Diseases Research Center, Boston Children's Hospital, Boston, MA 02115, USA; Department of Surgery, Harvard Medical School, Boston, MA 02115, USA
| | - Shanshan Liu
- Institutional Centers of Clinical and Translational Research, Boston Children's Hospital, Boston, MA 02115, USA
| | - Tanya Logvinenko
- Urological Diseases Research Center, Boston Children's Hospital, Boston, MA 02115, USA; Department of Surgery, Harvard Medical School, Boston, MA 02115, USA; Institutional Centers of Clinical and Translational Research, Boston Children's Hospital, Boston, MA 02115, USA
| | - Rosalyn Adam
- Urological Diseases Research Center, Boston Children's Hospital, Boston, MA 02115, USA; Department of Surgery, Harvard Medical School, Boston, MA 02115, USA
| | - Joshua R Mauney
- Urological Diseases Research Center, Boston Children's Hospital, Boston, MA 02115, USA; Department of Surgery, Harvard Medical School, Boston, MA 02115, USA.
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Baeke A, Costa K, Pallure V. Pyodermite-pyostomatite végétante (PPV) associée à une maladie inflammatoire chronique de l’intestin (MICI) : 2 cas traités efficacement par dapsone. Ann Dermatol Venereol 2015. [DOI: 10.1016/j.annder.2015.10.462] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Becquart O, Pallure V, Bourichi W, Martzel A, Costa K, Chauvet E. Dermatose neutrophilique induite par azathioprine au cours d’une maladie de Crohn. Rev Med Interne 2014. [DOI: 10.1016/j.revmed.2014.03.273] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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18
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Pallure V, Chauvet E, Costa K, Dereure O. Lymphome B intravasculaire et dermatite granulomateuse interstitielle avec arthrites : association inédite de deux affections rares et trompeuses. Ann Dermatol Venereol 2013. [DOI: 10.1016/j.annder.2013.09.281] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Bruno R, Silveira F, Costa K, Freitas R, Ormond J, Postruznik D. COMPARATIVE TRIAL BETWEEN PROMESTRIENE AND ESTRIOL VAGINAL CREAMS: ANALYSIS AFTER SIX CONTINUOUS MONTHS. Maturitas 2009. [DOI: 10.1016/s0378-5122(09)70110-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Mathiyakom W, McNitt-Gray JL, Requejo P, Costa K. Modifying center of mass trajectory during sit-to-stand tasks redistributes the mechanical demand across the lower extremity joints. Clin Biomech (Bristol, Avon) 2005; 20:105-11. [PMID: 15567544 DOI: 10.1016/j.clinbiomech.2004.08.005] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/24/2004] [Accepted: 08/26/2004] [Indexed: 02/07/2023]
Abstract
OBJECTIVE Sit-to-stand tasks are commonly facilitated by modifying the initial position of the center of mass relative to the feet. It was hypothesized that modifications in the center of mass trajectory during sit-to-stand tasks altered the total body momentum at seat departure and redistributed the lower extremity net joint moments. DESIGN Between-task within-subject comparison was employed using a robust statistical method to accommodate for small sample size. METHODS Six individuals performed four sit-to-stand tasks with systematic modifications in the initial center of mass position by varying the orientation of the lower extremity segments. The momentum of the center of mass and lower extremity net joint moments were quantified and compared. RESULTS Reducing the horizontal center of mass displacement significantly reduced horizontal total body momentum required at seat departure. Sit-to-stand tasks initiated with more horizontal shank and thigh positions required significantly greater knee and hip extensor net joint moments than those with more vertical shank and thigh positions. Sit-to-stand tasks initiated with vertical shank positions also required significantly greater hip extensor net joint moments as compared to those with more horizontal shank orientations. INTERPRETATION When changes in initial center of mass position are made, alteration in center of mass horizontal momentum and the orientation of the lower extremity segments relative to the reaction force are observed. Consequently, mechanical demand imposed on the ankle, knee, and hip joint is redistributed. The magnitude of the net joint moments is dependent on the segment orientation, the reaction force, and the adjacent net joint moment.
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Affiliation(s)
- W Mathiyakom
- Biomechanics Research Laboratory, Department of Kinesiology, University of Southern California, 3560 Watt Way, PED 107, Los Angeles, CA 90089-0650, USA
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Wei Z, Costa K, Al-Mehdi AB, Dodia C, Muzykantov V, Fisher AB. Simulated ischemia in flow-adapted endothelial cells leads to generation of reactive oxygen species and cell signaling. Circ Res 1999; 85:682-9. [PMID: 10521241 DOI: 10.1161/01.res.85.8.682] [Citation(s) in RCA: 100] [Impact Index Per Article: 4.0] [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] [Indexed: 11/16/2022]
Abstract
We have previously shown that increased reactive oxygen species (ROS) generation occurs with ischemia in the oxygenated lung and have hypothesized that mechanotransduction is the initiating event. In the present study, we developed an in vitro model of oxygenated ischemia by interrupting medium flow to flow-adapted bovine pulmonary artery endothelial cells in an artificial capillary system. Cellular oxygenation during the "ischemic" period was maintained by perfusing medium over the abluminal surface of porous capillaries. Cells were assessed for ROS generation, nuclear factor-kappaB (NF-kappaB) and activator protein-1 (AP-1) binding activities, and DNA synthesis using dichlorofluorescein fluorescence by flow cytometry and spectrofluorometry, electrophoretic mobility shift assay of nuclear extracts with NF-kappaB-specific or AP-1-specific (32)P-labeled oligonucleotides, and (3)H-thymidine incorporation into DNA. Cells that were flow adapted for 2 to 7 days with 1 to 2 dyne/cm(2) shear stress exhibited a 1.6- to 1.9-fold increase in ROS generation during 1 hour of simulated ischemia compared with continuously perfused cells. This effect was abolished by diphenyleneiodonium chloride (DPI), indicating a role for a flavoprotein such as NADPH oxidase. The increase in ROS generation with ischemia was similar for cells from low and high passages. With ischemia, flow-adapted cells exhibited increases of 1.7-fold in nuclear NF-kappaB and 1.5-fold in nuclear AP-1; these changes were abolished by pretreatment with N-acetylcysteine or DPI. Ischemia for 24 hours resulted in a 1.8-fold increase of (3)H-thymidine incorporation into DNA and a significant increase of cells entering the cell cycle, as indicated by flow cytometry with propidium iodide. We conclude that flow-adapted endothelial cells generate ROS with ischemia that results in activation of NF-kappaB and AP-1 and an increase of DNA synthesis. This effect is not mediated by hypoxia, implicating a role for mechanotransduction in ischemia-mediated cell signaling.
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Affiliation(s)
- Z Wei
- Institute for Environmental Medicine, University of Pennsylvania Medical Center, Philadelphia, PA 19104-6068, USA
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Abstract
PURPOSE Strain magnitude is known to be a primary determinant of the osteogenic response to loading. However, whether bone adaptation to muscle loading is determined primarily by load magnitude is unclear. The purpose of this study was to determine the contribution of load magnitude from muscle action on the site-specific osteogenic response. METHODS Twenty young women (12 exercise, 8 control) served as subjects. Bone mineral density (BMD) of the whole body and mid-femur segment and body composition were determined by dual-energy x-ray absorptiometry. Knee extension and flexion strengths were determined on a KinCom dynamometer, with surface electromyography of the vastus lateralis muscle. Exercise subjects trained three times weekly for 18 wk on a KinCom. One leg trained using eccentric knee extension and flexion, and the opposite leg trained using concentric knee extension and flexion. RESULTS Eccentric exercise demonstrated greater force production with lower integrated electromyographic signal (IEMG) compared with concentric exercise. Significant increases in muscle strength occurred in both exercised legs (P < 0.05), which were of similar relative change. However, only the eccentric trained leg significantly increased mid-femur segment BMD (+3.9%, P < 0.05) and mid-thigh segment lean mass (+5.2%, P < 0.05). CONCLUSIONS These results suggest that eccentric muscle training is more osteogenic than concentric muscle training and that eccentric training is more efficient by attaining higher force production with lower IEMG.
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Affiliation(s)
- S A Hawkins
- Department of Exercise Science, University of Southern California, Los Angeles 90033, USA
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Costa K, Bacher G, Allmaier G, Dominguez-Bello MG, Engstrand L, Falk P, de Pedro MA, García-del Portillo F. The morphological transition of Helicobacter pylori cells from spiral to coccoid is preceded by a substantial modification of the cell wall. J Bacteriol 1999; 181:3710-5. [PMID: 10368145 PMCID: PMC93848 DOI: 10.1128/jb.181.12.3710-3715.1999] [Citation(s) in RCA: 100] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The peptidoglycan (murein) of Helicobacter pylori has been investigated by high-performance liquid chromatography and mass spectrometric techniques. Murein from H. pylori corresponded to the A1gamma chemotype, but the muropeptide elution patterns were substantially different from the one for Escherichia coli in that the former produced high proportions of muropeptides with a pentapeptide side chain (about 60 mol%), with Gly residues as the C-terminal amino acid (5 to 10 mol%), and with (1-->6)anhydro-N-acetylmuramic acid (13 to 18 mol%). H. pylori murein also lacks murein-bound lipoprotein, trimeric muropeptides, and (L-D) cross-linked muropeptides. Cessation of growth and transition to coccoid shape triggered an increase in N-acetylglucosaminyl-N-acetylmuramyl-L-Ala-D-Glu (approximately 20 mol%), apparently at the expense of monomeric muropeptides with tri- and tetrapeptide side chains. Muropeptides with (1-->6)anhydro-muramic acid and with Gly were also more abundant in resting cells.
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Affiliation(s)
- K Costa
- Centro de Biología Molecular "Severo Ochoa", CSIC-UAM, Facultad de Ciencias, Universidad Autónoma de Madrid, 28049 Madrid, Spain
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Al-Mehdi AB, Zhao G, Dodia C, Tozawa K, Costa K, Muzykantov V, Ross C, Blecha F, Dinauer M, Fisher AB. Endothelial NADPH oxidase as the source of oxidants in lungs exposed to ischemia or high K+. Circ Res 1998; 83:730-7. [PMID: 9758643 DOI: 10.1161/01.res.83.7.730] [Citation(s) in RCA: 216] [Impact Index Per Article: 8.3] [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] [Indexed: 11/16/2022]
Abstract
We have previously demonstrated the generation of reactive oxygen species (ROS) in cultured bovine pulmonary artery endothelial cells (BPAECs) and in isolated perfused rat lungs exposed to high K+ and during global lung ischemia. The present study evaluates the NADPH oxidase pathway as a source of ROS in these models. ROS production, detected by oxidation of the fluorophore, dichlorodihydrofluorescein, increased 2.5-fold in BPAECs and 6-fold in rat or mouse lungs exposed to high (24 mmol/L) K+. ROS generation was markedly inhibited by diphenyliodonium, a flavoprotein inhibitor, and by the synthetic peptide PR-39, an inhibitor of NADPH oxidase assembly, whereas allopurinol had no effect. With ischemia (1 hour), ROS generation by rat and mouse lungs increased 7-fold; PR-39 showed concentration-dependent inhibition of ROS production, with 50% inhibition at 3 micromol/L PR-39. ROS production in lungs exposed to high K+ or ischemia was essentially abolished in mice with a "knockout" of gp91(phox), a membrane-localized cytochrome component of NADPH oxidase; increased ROS production by these lungs after anoxia/reoxygenation was similar to control. PR-39 also inhibited ischemia and the high K+-mediated increase in lung thiobarbituric acid reactive substance. Western blotting of BPAECs and immunocytochemistry of BPAECs and rat and mouse lungs showed the presence of p47phox, a cytoplasmic component of NADPH oxidase and the putative target for PR-39 inhibition. In situ fluorescence imaging in the intact lung demonstrated that the increased dichlorofluorescein fluorescence in these models of ROS generation was localized primarily to the pulmonary endothelium. These studies demonstrate that ROS production in lungs exposed to ischemia or high K+ results from assembly and activation of a membrane-associated NAPDH oxidase of the pulmonary endothelium.
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Affiliation(s)
- A B Al-Mehdi
- Institute for Environmental Medicine, University of Pennsylvania Medical Center, Philadelphia, PA 19104-6068, USA
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Mintzer J, Nietert P, Costa K, Rust P, Hoernig K. Identifying persons with dementia by use of a caregiver telephone interview. Am J Geriatr Psychiatry 1998; 6:176-9. [PMID: 9581213] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
A telephone screening assessment designed to identify persons likely to have dementia was conducted in a random community sample of 4,403 adults. Because of the cognitive impairment of the subjects, information was obtained from caregivers. Twenty-nine subjects were identified as likely to have dementia. Of these, 15 agreed to a complete dementia assessment conducted in their residence, and all were diagnosed with dementia. There was high reliability between the caregiver telephone interview and the clinical examination.
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Affiliation(s)
- J Mintzer
- Medical University of South Carolina, Institute of Psychiatry, Charleston, USA
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Abstract
Alzheimer's disease and other dementing disorders have been reported in most ethnic groups living in the United States. Although the presence of these disorders in different U.S. ethnic groups is well documented, the characteristics of dementing disorders, such as the presence of behavioral disturbances, in these groups remains unexplored.
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Affiliation(s)
- J E Mintzer
- Medical University of South Carolina, Charleston, USA
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Tavares-Neto J, Naoum PC, Adorno J, Azevêdo P, Brito F, Caldas M, Couto M, Costa K, Martinelli C, Gonzalez A. [Hemoglobinopathies in the Federal District, Brazil]. Rev Soc Bras Med Trop 1986; 19:13-9. [PMID: 3685525 DOI: 10.1590/s0037-86821986000100004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
Em uma amostra de 3137 pessoas, residentes no Distrito Federal, foram detectadas as seguintes hemoglobinas: em 3009(95,92%) HbAA; em 91 (2,90%) HbAS; em 20(0,64%) HbAC; em 8 (0,26%) talassemia beta minor; em 5(0,16%) HbAJ alfa; em 3 (0,09%) HbAM e em 1 (0,03%) talassemia major associada com HbAS. A HbAS têm as seguintes freqüências, quanto ao grupo racial: branco - 1,84%; mulato claro 2,55%; mulato médio-3,68%; mulato escuro - 6,80%; negro -10,43% e mestiço de índio -3,85%.
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