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Goyanes AM, Moldobaeva A, Marimoutou M, Varela LC, Wang L, Johnston LF, Aladdin MM, Peloquin GL, Kim BS, Damarla M, Suresh K, Sato T, Kolb TM, Hassoun PM, Damico RL. Functional Impact of Human Genetic Variants of COL18A1/Endostatin on Pulmonary Endothelium. Am J Respir Cell Mol Biol 2020; 62:524-534. [PMID: 31922883 PMCID: PMC7110972 DOI: 10.1165/rcmb.2019-0056oc] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [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: 02/13/2019] [Accepted: 01/08/2020] [Indexed: 12/22/2022] Open
Abstract
Pulmonary arterial hypertension (PAH) is an incurable disease characterized by disordered and dysfunctional angiogenesis leading to small-vessel loss and an obliterative vasculopathy. The pathogenesis of PAH is not fully understood, but multiple studies have demonstrated links between elevated angiostatic factors, disease severity, and adverse clinical outcomes. ES (endostatin), one such circulating angiostatic peptide, is the cleavage product of the proteoglycan COL18A1 (collagen α1[XVIII] chain). Elevated serum ES is associated with increased mortality and disease severity in PAH. A nonsynonymous variant of ES (aspartic acid-to-asparagine substitution at amino acid 104; p.D104N) is associated with differences in PAH survival. Although COL18A1/ES expression is markedly increased in remodeled pulmonary vessels in PAH, the impact of ES on pulmonary endothelial cell (PEC) biology and molecular contributions to PAH severity remain undetermined. In the present study, we characterized the effects of exogenous ES on human PEC biology and signaling. We demonstrated that ES inhibits PEC migration, proliferation, and cell survival, with significant differences between human variants, indicating that they are functional genetic variants. ES promotes proteasome-mediated degradation of the transcriptional repressor ID1, increasing expression and release of TSP-1 (thrombospondin 1). ES inhibits PEC migration via an ID1/TSP-1/CD36-dependent pathway, in contrast to proliferation and apoptosis, which require both CD36 and CD47. Collectively, the data implicate ES as a novel negative regulator of ID1 and an upstream propagator of an angiostatic signal cascade converging on CD36 and CD47, providing insight into the cellular and molecular effects of a functional genetic variant linked to altered outcomes in PAH.
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Affiliation(s)
| | - Aigul Moldobaeva
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, and
| | - Mery Marimoutou
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, and
| | - Lidenys C. Varela
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, and
| | - Lan Wang
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, and
| | - Laura F. Johnston
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, and
| | - Meena M. Aladdin
- Department of Environmental Health Sciences, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, Maryland
| | - Grace L. Peloquin
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, and
| | - Bo S. Kim
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, and
| | - Mahendra Damarla
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, and
| | - Karthik Suresh
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, and
| | - Takahiro Sato
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, and
| | - Todd M. Kolb
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, and
| | - Paul M. Hassoun
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, and
| | - Rachel L. Damico
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, and
- Department of Environmental Health Sciences, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, Maryland
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Damarla M, Johnston LF, Liu G, Gao L, Wang L, Varela L, Kolb TM, Kim BS, Damico RL, Hassoun PM. XOR inhibition with febuxostat accelerates pulmonary endothelial barrier recovery and improves survival in lipopolysaccharide-induced murine sepsis. Physiol Rep 2018; 5:5/15/e13377. [PMID: 28801519 PMCID: PMC5555900 DOI: 10.14814/phy2.13377] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [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: 06/10/2017] [Revised: 07/11/2017] [Accepted: 07/13/2017] [Indexed: 12/29/2022] Open
Abstract
Sepsis is a leading cause of death among patients in the intensive care unit, resulting from multi‐organ failure. Activity of xanthine oxidoreductase (XOR), a reactive oxygen species (ROS) producing enzyme, is known to be elevated in nonsurvivors of sepsis compared to survivors. We have previously demonstrated that XOR is critical for ventilator‐induced lung injury. Using febuxostat, a novel nonpurine inhibitor of XOR, we sought to determine the role of XOR inhibition in a murine model of sepsis‐induced lung injury and mortality. C57BL/6J mice were subjected to intravenous (IV) lipopolysaccharide (LPS) for various time points, and lungs were harvested for analyses. Subsets of mice were treated with febuxostat, pre or post LPS exposure, or vehicle. Separate groups of mice were followed up for mortality after LPS exposure. After 24 hr of IV LPS, mice exhibited an increase in XOR activity in lung tissue and a significant increase in pulmonary endothelial barrier disruption. Pretreatment of animals with febuxostat before exposure to LPS, or treatment 4 h after LPS, resulted in complete abrogation of XOR activity. Inhibition of XOR with febuxostat did not prevent LPS‐induced pulmonary vascular permeability at 24 h, however, it accelerated recovery of the pulmonary endothelial barrier integrity in response to LPS exposure. Furthermore, treatment with febuxostat resulted in significant reduction in mortality. Inhibition of XOR with febuxostat accelerates recovery of the pulmonary endothelial barrier and prevents LPS‐induced mortality, whether given before or after exposure to LPS.
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Affiliation(s)
- Mahendra Damarla
- Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Laura F Johnston
- Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Gigi Liu
- Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Li Gao
- Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Lan Wang
- Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Lidenys Varela
- Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Todd M Kolb
- Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Bo S Kim
- Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Rachel L Damico
- Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Paul M Hassoun
- Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland
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Files DC, D'Alessio FR, Johnston LF, Kesari P, Aggarwal NR, Garibaldi BT, Mock JR, Simmers JL, DeGorordo A, Murdoch J, Willis MS, Patterson C, Tankersley CG, Messi ML, Liu C, Delbono O, Furlow JD, Bodine SC, Cohn RD, King LS, Crow MT. A critical role for muscle ring finger-1 in acute lung injury-associated skeletal muscle wasting. Am J Respir Crit Care Med 2012; 185:825-34. [PMID: 22312013 DOI: 10.1164/rccm.201106-1150oc] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
RATIONALE Acute lung injury (ALI) is a debilitating condition associated with severe skeletal muscle weakness that persists in humans long after lung injury has resolved. The molecular mechanisms underlying this condition are unknown. OBJECTIVES To identify the muscle-specific molecular mechanisms responsible for muscle wasting in a mouse model of ALI. METHODS Changes in skeletal muscle weight, fiber size, in vivo contractile performance, and expression of mRNAs and proteins encoding muscle atrophy-associated genes for muscle ring finger-1 (MuRF1) and atrogin1 were measured. Genetic inactivation of MuRF1 or electroporation-mediated transduction of miRNA-based short hairpin RNAs targeting either MuRF1 or atrogin1 were used to identify their role in ALI-associated skeletal muscle wasting. MEASUREMENTS AND MAIN RESULTS Mice with ALI developed profound muscle atrophy and preferential loss of muscle contractile proteins associated with reduced muscle function in vivo. Although mRNA expression of the muscle-specific ubiquitin ligases, MuRF1 and atrogin1, was increased in ALI mice, only MuRF1 protein levels were up-regulated. Consistent with these changes, suppression of MuRF1 by genetic or biochemical approaches prevented muscle fiber atrophy, whereas suppression of atrogin1 expression was without effect. Despite resolution of lung injury and down-regulation of MuRF1 and atrogin1, force generation in ALI mice remained suppressed. CONCLUSIONS These data show that MuRF1 is responsible for mediating muscle atrophy that occurs during the period of active lung injury in ALI mice and that, as in humans, skeletal muscle dysfunction persists despite resolution of lung injury.
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Affiliation(s)
- D Clark Files
- Division of Pulmonary and Critical Care Medicine, Johns Hopkins Asthma and Allergy Center, Baltimore, Maryland, USA
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Stockerl-Goldstein KE, Reddy SA, Horning SF, Blume KG, Chao NF, Hu WW, Johnston LF, Long GD, Strober S, Wong RM, Feiner RH, Kobler S, Negrin RS. Favorable treatment outcome in non-Hodgkin's lymphoma patients with "poor" mobilization of peripheral blood progenitor cells. Biol Blood Marrow Transplant 2001; 6:506-12. [PMID: 11063379 DOI: 10.1016/s1083-8791(00)70021-8] [Citation(s) in RCA: 58] [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] [Indexed: 10/25/2022]
Abstract
Our purpose was to evaluate the outcome and costs of high-dose chemotherapy and autologous peripheral blood progenitor cell (PBPC) transplantation in patients with the inability to mobilize sufficient numbers of PBPCs to allow rapid engraftment after PBPC transplantation. We treated 172 consecutive non-Hodgkin's lymphoma (NHL) patients with cyclophosphamide and granulocyte colony-stimulating factor followed by apheresis to collect PBPCs. The cells were separated on a Percoll gradient and purged with monoclonal antibodies and complement. The patients were categorized as "good" mobilizers if a collection of > or =2 x 10(6) CD34+ cells/kg was obtained (n = 138, 80%) or "poor" mobilizers if <2 x 10(6) CD34+ cells/kg were obtained (n = 34, 20%). With a median follow-up of 3.5 years, there is no statistically significant difference in actuarial event-free survival, overall survival, or relapse for good mobilizers compared with poor mobilizers. However, there was a trend toward increasing nonrelapse, transplantation-related mortality of 11.8% for poor mobilizers versus 3.6% for good mobilizers (P = .08) and early death from all causes including relapse within 120 days (poor 20.6% versus good 8.7%, P = .06). The total cost for bone marrow transplantation-related care was significantly higher, at $140,264 for poor mobilizers versus $80,833 for good mobilizers (P = .0001). The population of patients with NHL who mobilize PBPCs poorly into the circulation have a higher cost for posttransplant support. However, there is no significant difference in relapse, event-free survival, or overall survival for such patients compared with those who mobilize PBPCs easily.
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Affiliation(s)
- K E Stockerl-Goldstein
- Divisions of Bone Marrow Transplantation, Stanford University School of Medicine, California 94305-5623, USA.
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Keyserling TC, Ammerman AS, Samuel-Hodge CD, Ingram AF, Skelly AH, Elasy TA, Johnston LF, Cole AS, Henríquez-Roldán CF. A diabetes management program for African American women with type 2 diabetes. Diabetes Educ 2000; 26:796-805. [PMID: 11140007 DOI: 10.1177/014572170002600508] [Citation(s) in RCA: 44] [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] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
PURPOSE This paper describes a clinic- and community-based diabetes intervention program designed to improve dietary, physical activity, and self-care behaviors of older African American women with type 2 diabetes. It also describes the study to evaluate this program and baseline characteristics of participants. METHODS The New Leaf ... Choices for Healthy Living With Diabetes program consists of 4 clinic-based health counselor visits, a community intervention with 12 monthly phone calls from peer counselors, and 3 group sessions. A randomized, controlled trial to evaluate the effectiveness of this intervention is described. RESULTS Seventeen focus groups of African American women were used to assessed the cultural relevance/acceptability of the intervention and measurement instruments. For the randomized trial, 200 African American women with type 2 diabetes were recruited from 7 practices in central North Carolina. Mean age was 59, mean diabetes duration was 10 years, and participants were markedly overweight and physically inactive. CONCLUSIONS Participants found this program to be culturally relevant and acceptable. Its effects on diet, physical activity, and self-care behaviors will be assessed in a randomized trial.
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Affiliation(s)
- T C Keyserling
- The Department of Medicine, School of Medicine, University of North Carolina at Chapel Hill (Dr Keyserling)
| | - A S Ammerman
- Department of Nutrition, Schools of Medicine and Public Health, University of North Carolina at Chapel Hill (Dr Ammerman and Ms Samuel-Hodge)
| | - C D Samuel-Hodge
- Department of Nutrition, Schools of Medicine and Public Health, University of North Carolina at Chapel Hill (Dr Ammerman and Ms Samuel-Hodge)
| | - A F Ingram
- Center for Health Promotion and Disease Prevention, University of North Carolina at Chapel Hill (Mss Ingram and Cole and Mr Johnston)
| | - A H Skelly
- The School of Nursing, University of North Carolina at Chapel Hill (Dr Skelly)
| | | | - L F Johnston
- Center for Health Promotion and Disease Prevention, University of North Carolina at Chapel Hill (Mss Ingram and Cole and Mr Johnston)
| | - A S Cole
- Center for Health Promotion and Disease Prevention, University of North Carolina at Chapel Hill (Mss Ingram and Cole and Mr Johnston)
| | - C F Henríquez-Roldán
- Carlos F. Henriquez-Roldan is a PhD candidate at the University of North Carolina at Chapel Hill and is sponsored by a scholarship from Beca Presidente de la Republica de Chile
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Harrell JS, Johnston LF, Griggs TR, Schaefer P, Carr EG, McMurray RG, Meibohm AR, Munoz S, Raines BN, Williams OD. An occupation based physical activity intervention program: improving fitness and decreasing obesity. AAOHN J 1996; 44:377-84. [PMID: 8852235] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
The purpose of this quasi-experimental study was to determine the effectiveness of an occupation based health and fitness program. Subjects were 1,504 police trainees (85% male, 15% female) with an ethnic distribution of 82% white, 16% African American, and 2% other. Data were collected at 25 sites across the state of North Carolina. The sites were randomly assigned to either the experimental group (implemented the intervention) or the control group (continued usual training). As compared with controls, subjects at the experimental sites improved significantly in cardiovascular fitness (aerobic power), general muscular strength (number of sit ups per minute), and flexibility, and lowered their body fat. The intervention required minimal equipment and was taught primarily by peers who received a 1 week training program. This occupational approach to improving health could be particularly useful in occupations with many workers who seldom engage in leisure time physical activity.
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