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Bodin Ö, Alexander S, Baggio J, Barnes M, Berardo R, Cumming G, Dee L, Fischer AP, Fischer M, Mancilla-Garcia M, Guerrero A, Hileman J, Ingold K, Matous P, Morrison T, Nohrstedt D, Pittman J, Robins G, Sayles J. Improving network approaches to the study of complex social-ecological interdependencies. Nat Sustain 2019; 2:551-559. [PMID: 35342825 PMCID: PMC8943905 DOI: 10.1038/s41893-019-0308-0] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Achieving effective, sustainable environmental governance requires a better understanding of the causes and consequences of the complex patterns of interdependencies connecting people and ecosystems within and across scales. Network approaches for conceptualizing and analyzing these interdependencies offer one promising solution. Here, we present two advances we argue are needed to further this area of research: (i) a typology of causal assumptions explicating the causal aims of any given network-centric study of social-ecological interdependencies; (ii) unifying research design considerations that facilitate conceptualizing exactly what is interdependent, through what types of relationships, and in relation to what kinds of environmental problems. The latter builds on the appreciation that many environmental problems draw from a set of core challenges that re-occur across contexts. We demonstrate how these advances combine into a comparative heuristic that facilitates leveraging case-specific findings of social-ecological interdependencies to generalizable, yet context-sensitive, theories based on explicit assumptions of causal relationships.
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Affiliation(s)
- Ö. Bodin
- Stockholm University, Stockholm Resilience Centre, 10691 Stockholm, Sweden
- corresponding author:
| | - S.M. Alexander
- National Socio-Environmental Synthesis Center, University of Maryland, Annapolis, MD 21401, USA
| | - J. Baggio
- Department of Political Science and Sustainable Coastal Systems Cluster, National Center for Integrated Coastal Research, University of Central Florida, Orlando, 32816, USA
| | - M.L. Barnes
- Australian Research Council Centre of Excellence for Coral Reef Studies, James Cook University, Townsville 4811, Australia
| | - R. Berardo
- School of Environment and Natural Resources, The Ohio State University, Columbus, OH 43210, USA
| | - G.S. Cumming
- Australian Research Council Centre of Excellence for Coral Reef Studies, James Cook University, Townsville 4811, Australia
| | - L. Dee
- Department of Fisheries, Wildlife, and Conservation Biology, University of Minnesota, St. Paul, MN 55108, USA
| | - A. P. Fischer
- School for Environment and Sustainability, University of Michigan, Ann Arbor, MI 48109, USA
| | - M. Fischer
- Department of Environmental Social Sciences, Eawag, 8600 Dübendorf, Switzerland
- Institute of Political Science, University of Bern, 3012 Bern, Switzerland
| | - M. Mancilla-Garcia
- Stockholm University, Stockholm Resilience Centre, 10691 Stockholm, Sweden
| | - A. Guerrero
- School of Biological Sciences, The University of Queensland, Brisbane 4067, Australia
- ARC Centre of Excellence for Environmental Decisions, The University of Queensland, Brisbane 4067, Australia
| | - J. Hileman
- Stockholm University, Stockholm Resilience Centre, 10691 Stockholm, Sweden
| | - K. Ingold
- Department of Environmental Social Sciences, Eawag, 8600 Dübendorf, Switzerland
- Institute of Political Science, University of Bern, 3012 Bern, Switzerland
- Oeschger Centre for Climate Change Research, University of Bern, 3012 Bern, Switzerland
| | - P. Matous
- The University of Sydney, Faculty of Engineering and Information Technologies, 2006 New South Wales, Australia
| | - T.H. Morrison
- Australian Research Council Centre of Excellence for Coral Reef Studies, James Cook University, Townsville 4811, Australia
| | - D. Nohrstedt
- Department of Government, and Center for Natural Hazards and Disaster Science (CNDS), Uppsala University, 75120 Uppsala, Sweden
| | - J. Pittman
- School of Planning, University of Waterloo, 200 University Ave W, Waterloo, ON N2L 3G1, Canada
| | - G. Robins
- Melbourne School of Psychological Sciences, The University of Melbourne, Australia; Faculty of Business and Law, Swinburne University, Melbourne, Australia
| | - J. Sayles
- ORISE Fellow Appointed with the U.S. Environmental Protection Agency, Office of Research and Development, National Health and Environmental Effects Research Laboratory, Atlantic Ecology Division, Narragansett, Rhode Island, USA
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Dube K, Evans D, Sylla L, Taylor J, Dee L. The critical importance of social sciences in early-phase HIV cure research: what's in it for biomedical HIV cure scientists? J Virus Erad 2017. [DOI: 10.1016/s2055-6640(20)30651-8] [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: 10/23/2022] Open
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Dubé K, Taylor J, Evans D, Sylla L, Dee L, Skinner A, Thirumurthy H, Weiner B, Rennie S, Greene S. OA1-3 Factors affecting participation in HIV cure-related research in the United States: implications for effective and ethical implementation. J Virus Erad 2016. [DOI: 10.1016/s2055-6640(20)31007-4] [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: 11/17/2022] Open
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Afdhal NH, Zeuzem S, Schooley RT, Thomas DL, Ward JW, Litwin AH, Razavi H, Castera L, Poynard T, Muir A, Mehta SH, Dee L, Graham C, Church DR, Talal AH, Sulkowski MS, Jacobson IMFTNPOHCVTMP. The new paradigm of hepatitis C therapy: integration of oral therapies into best practices. J Viral Hepat 2013; 20:745-60. [PMID: 24168254 PMCID: PMC3886291 DOI: 10.1111/jvh.12173] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.1] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/23/2013] [Accepted: 08/24/2013] [Indexed: 12/12/2022]
Abstract
Emerging data indicate that all-oral antiviral treatments for chronic hepatitis C virus (HCV) will become a reality in the near future. In replacing interferon-based therapies, all-oral regimens are expected to be more tolerable, more effective, shorter in duration and simpler to administer. Coinciding with new treatment options are novel methodologies for disease screening and staging, which create the possibility of more timely care and treatment. Assessments of histologic damage typically are performed using liver biopsy, yet noninvasive assessments of histologic damage have become the norm in some European countries and are becoming more widespread in the United States. Also in place are new Centers for Disease Control and Prevention (CDC) initiatives to simplify testing, improve provider and patient awareness and expand recommendations for HCV screening beyond risk-based strategies. Issued in 2012, the CDC recommendations aim to increase HCV testing among those with the greatest HCV burden in the United States by recommending one-time testing for all persons born during 1945-1965. In 2013, the United States Preventive Services Task Force adopted similar recommendations for risk-based and birth-cohort-based testing. Taken together, the developments in screening, diagnosis and treatment will likely increase demand for therapy and stimulate a shift in delivery of care related to chronic HCV, with increased involvement of primary care and infectious disease specialists. Yet even in this new era of therapy, barriers to curing patients of HCV will exist. Overcoming such barriers will require novel, integrative strategies and investment of resources at local, regional and national levels.
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Affiliation(s)
- N H Afdhal
- Division of Gastroenterology and Hepatology, Beth Israel Deaconess Medical Center, Harvard Medical SchoolBoston, MA, USA
| | - S Zeuzem
- Department of Medicine, J.W. Goethe University HospitalFrankfurt, Germany
| | - R T Schooley
- Division of Infectious Diseases, San Diego School of Medicine, University of CaliforniaLa Jolla, CA, USA
| | - D L Thomas
- Division of Infectious Diseases, Johns Hopkins University School of MedicineBaltimore, MD, USA
| | - J W Ward
- Division of Viral Hepatitis, Centers for Disease Control and PreventionAtlanta, GA, USA
| | - A H Litwin
- Departments of Medicine and Psychiatry and Behavioral Sciences, Montefiore Medical Center, Albert Einstein College of MedicineBronx, NY, USA
| | - H Razavi
- Center for Disease AnalysisLouisville, CO, USA
| | - L Castera
- Service d'Hepatologie, Hopital Beaujon, Assistance Publique Hopitaux de ParisClichy, France
| | - T Poynard
- Service d'Hepatologie, Groupe Hospitalier Pitie-SalpetriereParis, France
| | - A Muir
- Gastroenterology and Hepatology Research Group, Duke Clinical Research InstituteDurham, NC, USA
| | - S H Mehta
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public HealthBaltimore, MD, USA
| | - L Dee
- Fair Pricing Coalition and AIDS Action BaltimoreBaltimore, MD, USA
| | - C Graham
- Division of Infectious Disease, Beth Israel Deaconess Medical CenterBoston, MA, USA
| | - D R Church
- Massachusetts Department of Public Health, Bureau of Infectious DiseaseBoston, MA, USA
| | - A H Talal
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, University at BuffaloBuffalo, NY, USA
| | - M S Sulkowski
- Department of Medicine, Johns Hopkins University School of MedicineBaltimore, MD, USA
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Le Poole IC, Stennett LS, Bonish BK, Dee L, Robinson JK, Hernandez C, Hann SK, Nickoloff BJ. Expansion of vitiligo lesions is associated with reduced epidermal CDw60 expression and increased expression of HLA-DR in perilesional skin. Br J Dermatol 2003; 149:739-48. [PMID: 14616364 DOI: 10.1046/j.1365-2133.2003.05539.x] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.4] [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: 11/20/2022]
Abstract
BACKGROUND Detection of CDw60 in skin is representative of ganglioside D3 expression. This ganglioside is expressed primarily by melanocytes, and is of interest as a membrane antigen targeted by immunotherapy for melanoma patients. Expression of CDw60 by keratinocytes is defined by the presence of T-helper cell (Th)1 vs. Th2 cytokines, and can serve as a sentinel molecule to characterize an ongoing skin immune response. OBJECTIVES These immunobiological characteristics have provided the incentive to study the expression of CDw60 in the context of progressive vitiligo. METHODS Frozen sections were obtained from control skin and from vitiligo lesions and immunostained to show CDw60. Cells were cultured, their CDw60 expression studied and ribonuclease protection assays run to detect cytokine mRNA. RESULTS Resistance to cytokine-mediated regulation of CDw60 expression was demonstrated in vitro by melanocytes, which appeared capable of generating autocrine and paracrine regulatory molecules supporting CDw60 expression. Induction of CDw60 expression was inhibited by antibodies to interleukin (IL)-4, suggesting that this cytokine was responsible, at least in part, for melanocyte-induced CDw60 expression. Marginal skin from patients with progressive generalized vitiligo consistently showed a reduction in epidermal CDw60 expression alongside elevated human leucocyte associated antigen (HLA)-DR expression at the margin. It thus appears that inflammatory infiltrates present in marginal skin generate type 1 rather than type 2 cytokines, supportive of a cell-mediated autoimmune response. CONCLUSIONS These results support an active role of melanocytes within the skin immune system, and associate their loss in generalized vitiligo with a cell-mediated immune response mediated by type 1 cytokines.
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Affiliation(s)
- I C Le Poole
- Department of Pathology, Cardinal Bernardin Cancer Center Rm 203, Loyola University, 2160 South First Avenue, Maywood, Chicago, IL 60153, U.S.A.
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Kumar A, Brar R, Wang P, Dee L, Skorupa G, Khadour F, Schulz R, Parrillo JE. Role of nitric oxide and cGMP in human septic serum-induced depression of cardiac myocyte contractility. Am J Physiol 1999; 276:R265-76. [PMID: 9887205 DOI: 10.1152/ajpregu.1999.276.1.r265] [Citation(s) in RCA: 82] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Previous studies have demonstrated the existence of a circulating myocardial depressant substance during human septic shock. We have recently identified this substance as a synergistic combination of tumor necrosis factor-alpha (TNF-alpha) and interleukin-1beta (IL-1beta). This study utilized an in vitro cardiac myocyte assay to evaluate the potential mechanistic role of nitric oxide (NO) and cGMP in depression of myocyte contractility induced by TNF-alpha, IL-1beta, TNF-alpha + IL-1beta (at low concentrations), and human septic shock serum (HSS). TNF-alpha, IL-1beta, TNF-alpha + IL-1beta, and each of 5 sera from patients with acute septic shock caused depression of both maximum extent and peak velocity of cardiac myocyte shortening and an increase in intracellular cGMP concentration during 30 min of exposure (minimum P < 0.01). NO synthetase (NOS) and guanylate cyclase inhibitors such as N-methyl-L-arginine (L-NMA) and methylene blue prevented these effects; an excess of L-arginine with L-NMA restored them (minimum P < 0.01). In contrast, D-arginine failed to reestablish cytokine-induced myocyte depression and cGMP accumulation prevented by L-NMA. Exposure of myocytes to TNF-alpha, IL-1beta, or TNF-alpha + IL-1beta produced a concentration-dependent increase in intracellular cGMP that paralleled the depression of cardiac myocyte contractility (minimum P < 0.001). In addition, TNF-alpha, IL-1beta, TNF-alpha + IL-1beta, or HSS application to cardiac myocytes resulted in increased NO gas generation, which was inhibited by L-NMA (minimum P < 0.01). Furthermore, unstimulated cardiac myocytes were shown to harbor constitutive but not inducible NOS activity. These data suggest that the sequential generation of NO by a constitutive NOS and cGMP by guanylate cyclase represents an important mechanism of cardiac myocyte depression by TNF-alpha, IL-1beta, TNF-alpha + IL-1beta, and the myocardial depressant substance(s) of septic shock.
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Affiliation(s)
- A Kumar
- Section of Critical Care Medicine, Department of Medicine, Rush-Presbyterian-St. Luke's Medical Center, Chicago, Illinois 60612, USA
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Rasgon S, James-Rogers A, Chemleski B, Ledezma M, Mercado L, Besario M, Trivedi J, Miller M, Dee L, Pryor L, Yeoh H. Maintenance of employment on dialysis. Adv Ren Replace Ther 1997; 4:152-9. [PMID: 9113231 DOI: 10.1016/s1073-4449(97)70042-6] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
This article describes the components of a multidisciplinary effort focused on promoting, among other goals, continued employment during end-stage renal disease (ESRD) treatment. The education and guidance of the patient begin during the pre-ESRD period, intensify through dialysis treatment, and continue even through posttransplantation follow-up. Such focused programs support patients in retaining their usual lifestyle, staying in their current jobs where possible, and maximizing self-esteem and quality of life.
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Affiliation(s)
- S Rasgon
- Department of Nephrology, Southern California-Permanente Medical Group, Los Angeles Medical Center 90027, USA
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Kumar A, Thota V, Dee L, Olson J, Uretz E, Parrillo JE. Tumor necrosis factor alpha and interleukin 1beta arc responsible for in vitro myocardial cell depression induced by human septic shock serum. Resuscitation 1996. [DOI: 10.1016/0300-9572(96)89047-2] [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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Kumar A, Thota V, Dee L, Olson J, Uretz E, Parrillo JE. Tumor necrosis factor alpha and interleukin 1beta are responsible for in vitro myocardial cell depression induced by human septic shock serum. Resuscitation 1996. [DOI: 10.1016/s0300-9572(96)90072-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Kumar A, Thota V, Dee L, Olson J, Uretz E, Parrillo JE. Tumor necrosis factor alpha and interleukin 1beta are responsible for in vitro myocardial cell depression induced by human septic shock serum. J Exp Med 1996; 183:949-58. [PMID: 8642298 PMCID: PMC2192364 DOI: 10.1084/jem.183.3.949] [Citation(s) in RCA: 545] [Impact Index Per Article: 19.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
Previous studies have demonstrated the presence of myocardial depression in clinical and experimental septic shock. This depression is associated with the presence of a circulating myocardial depressant substance with physical characteristics consistent with cytokines. The present study utilized an in vitro myocardial cell assay to examine the role of various human recombinant cytokines, including tumor necrosis factor (TNF)alpha and interleukin (IL)1beta, in depression of cardiac myocyte contractile function induced by serum from humans with septic shock. The extent and velocity of electrically paced rat cardiac myocytes in tissue culture was quantified by a closed loop video tracking system. Individually, TNF-alpha and IL-1beta each caused significant concentration-dependent depression of maximum extent and peak velocity of myocyte shortening in vitro. In combination, TNF-alpha and IL-1beta induced depression of myocardial cell contractility at substantially lower concentrations consistent with a synergistic effect. Using immunoabsorption, removal of both TNF-alpha and IL-1beta (but not either alone) from the serum of five patients with acute septic shock and marked reversible myocardial depression resulted in elimination of serum myocardial depressant activity. IL-2, -4, -6, -8, -10, and interferon gamma failed to cause significant cardiac myocyte depression over a wide range of concentrations. These data demonstrate that TNF-alpha and IL-1beta cause depression of myocardial cell contraction in vitro and suggest that these two cytokines act synergistically to cause sepsis-associated myocardial depression in humans.
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Affiliation(s)
- A Kumar
- Department of Medicine, Rush-Presbyterian-St. Luke's Medical Center, Chicago, Illinois 60612, USA
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Abstract
Acetabular fractures in 26 racing Greyhounds were reviewed. All fractures occurred during racing or training and were unrelated to any external trauma. All fractures had similar configurations, were minimally displaced, and involved only the acetabulum. Affected dogs were young (16-36 months). Fractures occurred unilaterally (22 dogs) and bilaterally (4 dogs). There was no sex predilection, and both right and left sides were equally represented. Bilateral fractures were associated with retraining between the occurrence of the first and second fractures. Radiographically, a fracture line was consistently visible in the caudal third of the acetabulum. Fractures in gross specimens resembled an inverted "Y." Results of histologic evaluation of two fractured acetabula showed changes characteristic of a nonunion fracture. Microfractures were evident in the grossly normal acetabulum opposite the fractured side. Evidence obtained from this study suggests a common pathogenesis of the fractures related to tremendous repetitive stresses produced during running. Greyhounds with unilateral acetabular fractures may provide a reproducible model for future studies of stress fractures in animals and humans because of the high incidence of bilateral fractures that develop during retraining. Surgical repair of the acetabular stress fracture was more successful than conservative management in returning the dogs to competitive racing.
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Affiliation(s)
- K Wendelburg
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, Ohio State University, Columbus
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Abstract
The cerviscope has been proposed as a screening tool for use in conjunction with the Papanicolaou smear as a system offering many of the same advantages as colposcopy and cytology. One hundred twenty-five patients were evaluated with the cerviscope who had been referred to this colposcopy clinic with a diagnosis of dysplasia. The purpose of this study was to evaluate the instrument's potential as a screening adjunct in the context of simultaneous evaluation by colposcopy. Thirty-nine percent (49 patients) were unevaluable due to technical problems (defective cervicogram, nonvisualized squamocolumnar junction). Significantly, 67% (26 patients) of the 39 patients reported as having negative cervicograms had a biopsy-proven dysplasia (19 mild, 4 moderate, 3 severe). By the chi 2 method, this is statistically significant (P less than 0.001).
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