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Li Y, McIntyre KM, Rasmussen P, Gilbert W, Chaters G, Raymond K, Jemberu WT, Larkins A, Patterson GT, Kwok S, Kappes AJ, Mayberry D, Schrobback P, Acosta MH, Stacey DA, Huntington B, Bruce M, Knight-Jones T, Rushton J. Rationalising development of classification systems describing livestock production systems for disease burden analysis within the Global Burden of Animal Diseases programme. Res Vet Sci 2024; 168:105102. [PMID: 38215653 DOI: 10.1016/j.rvsc.2023.105102] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2023] [Revised: 11/05/2023] [Accepted: 11/27/2023] [Indexed: 01/14/2024]
Abstract
The heterogeneity that exists across the global spectrum of livestock production means that livestock productivity, efficiency, health expenditure and health outcomes vary across production systems. To ensure that burden of disease estimates are specific to the represented livestock population and people reliant upon them, livestock populations need to be systematically classified into different types of production system, reflective of the heterogeneity across production systems. This paper explores the data currently available of livestock production system classifications and animal health through a scoping review as a foundation for the development of a framework that facilitates more specific estimates of livestock disease burdens. A top-down framework to classification is outlined based on a systematic review of existing classification methods and provides a basis for simple grouping of livestock at global scale. The proposed top-down classification framework, which is dominated by commodity focus of production along with intensity of resource use, may have less relevance at the sub-national level in some jurisdictions and will need to be informed and adapted with information on how countries themselves categorize livestock and their production systems. The findings in this study provide a foundation for analysing animal health burdens across a broad level of production systems. The developed framework will fill a major gap in how livestock production and health are currently approached and analysed.
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Affiliation(s)
- Yin Li
- Global Burden of Animal Diseases (GBADs) Programme; Commonwealth Scientific and Industrial Research Organization, Agriculture and Food, 4067 Brisbane, Australia; School of Veterinary Medicine and Centre for Biosecurity and One Health, Harry Butler Institute, Murdoch University, Australia.
| | - K Marie McIntyre
- Global Burden of Animal Diseases (GBADs) Programme; School of Natural and Environmental Sciences, Newcastle University, UK; Institute of Infection and Global Health, University of Liverpool, IC2 Building, 146 Brownlow Hill, Liverpool L3 5RF, UK
| | - Philip Rasmussen
- Department of Veterinary and Animal Sciences, Section for Animal Welfare and Disease Control, University of Copenhagen, Copenhagen, Denmark; Section for Epidemiology, University of Zurich, Zurich, Switzerland
| | - William Gilbert
- Global Burden of Animal Diseases (GBADs) Programme; Institute of Infection and Global Health, University of Liverpool, IC2 Building, 146 Brownlow Hill, Liverpool L3 5RF, UK
| | - Gemma Chaters
- Global Burden of Animal Diseases (GBADs) Programme; Institute of Infection and Global Health, University of Liverpool, IC2 Building, 146 Brownlow Hill, Liverpool L3 5RF, UK
| | - Kassy Raymond
- Global Burden of Animal Diseases (GBADs) Programme; School of Computer Science, University of Guelph, Canada
| | - Wudu T Jemberu
- Global Burden of Animal Diseases (GBADs) Programme; International Livestock Research Institute, P O Box 5689, Addis Ababa, Ethiopia; University of Gondar, P. O. Box 196, Gondar, Ethiopia
| | - Andrew Larkins
- Global Burden of Animal Diseases (GBADs) Programme; School of Veterinary Medicine and Centre for Biosecurity and One Health, Harry Butler Institute, Murdoch University, Australia
| | - Grace T Patterson
- Global Burden of Animal Diseases (GBADs) Programme; School of Computer Science, University of Guelph, Canada
| | - Stephen Kwok
- Global Burden of Animal Diseases (GBADs) Programme; School of Veterinary Medicine and Centre for Biosecurity and One Health, Harry Butler Institute, Murdoch University, Australia
| | - Alexander James Kappes
- Global Burden of Animal Diseases (GBADs) Programme; School of Economic Sciences & Paul G. Allen School for Global Health, Washington State University, USA
| | - Dianne Mayberry
- Global Burden of Animal Diseases (GBADs) Programme; Commonwealth Scientific and Industrial Research Organization, Agriculture and Food, 4067 Brisbane, Australia
| | - Peggy Schrobback
- Global Burden of Animal Diseases (GBADs) Programme; Commonwealth Scientific and Industrial Research Organization, Agriculture and Food, 4067 Brisbane, Australia
| | - Mario Herrero Acosta
- College of Agriculture and Life Sciences, Cornell University, 250C Warren Hall, Ithaca, NY 14853, USA
| | - Deborah A Stacey
- Global Burden of Animal Diseases (GBADs) Programme; School of Computer Science, University of Guelph, Canada
| | - Benjamin Huntington
- Global Burden of Animal Diseases (GBADs) Programme; Institute of Infection and Global Health, University of Liverpool, IC2 Building, 146 Brownlow Hill, Liverpool L3 5RF, UK
| | - Mieghan Bruce
- Global Burden of Animal Diseases (GBADs) Programme; School of Veterinary Medicine and Centre for Biosecurity and One Health, Harry Butler Institute, Murdoch University, Australia
| | - Theodore Knight-Jones
- Global Burden of Animal Diseases (GBADs) Programme; International Livestock Research Institute, P O Box 5689, Addis Ababa, Ethiopia
| | - Jonathan Rushton
- Global Burden of Animal Diseases (GBADs) Programme; Institute of Infection and Global Health, University of Liverpool, IC2 Building, 146 Brownlow Hill, Liverpool L3 5RF, UK
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Di Bari C, Venkateswaran N, Fastl C, Gabriël S, Grace D, Havelaar AH, Huntington B, Patterson GT, Rushton J, Speybroeck N, Torgerson P, Pigott DM, Devleesschauwer B. The global burden of neglected zoonotic diseases: Current state of evidence. One Health 2023; 17:100595. [PMID: 37545541 PMCID: PMC10400928 DOI: 10.1016/j.onehlt.2023.100595] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2023] [Revised: 06/22/2023] [Accepted: 06/25/2023] [Indexed: 08/08/2023] Open
Abstract
The majority of emerging infectious diseases are zoonoses, most of which are classified as "neglected". By affecting both humans and animals, zoonoses pose a dual burden. The disability-adjusted life year (DALY) metric quantifies human health burden since it combines mortality and morbidity. This review aims to describe and analyze the current state of evidence on neglected zoonotic diseases (NZDs) burden and start a discussion on the current understanding of the global burden of NZDs. We identified 26 priority NZDs through consulting three international repositories for national prioritization exercises. A systematic review of global and national burden of disease (BoD) studies was conducted using pre-selected databases. Data on diseases, location and DALYs were extracted for each eligible study. A total of 1887 records were screened, resulting in 74 eligible studies. The highest number of BoD was found for non-typhoidal salmonellosis (23), whereas no estimates were found for West Nile, Marburg and Lassa fever. Geographically, the highest number of studies was performed in the Netherlands (11), China (5) and Iran (4). The number of BoD retrieved mismatched the perceived importance in national prioritization exercises. For example, anthrax was considered a priority NZD in 65 countries; however, only one national study estimating BoD was retrieved. By summing the available global estimates, the selected NZDs caused at least 21 million DALYs per year, a similar order of magnitude to (but less than) the burden due to foodborne disease (included in the Foodborne Disease Burden Epidemiology Reference Group). The global burden of disease landscape of NZDs remains scattered. There are several priority NZDs for which no burden estimates exist, and the number of BoD studies does not reflect national disease priorities. To have complete and consistent estimates of the global burden of NZDs, these diseases should be integrated in larger global burden of disease initiatives.
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Affiliation(s)
- Carlotta Di Bari
- GBADs programme, University of Liverpool, United Kingdom
- Department of Epidemiology and Public Health, Sciensano, Brussels, Belgium
- Department of Translational Physiology, Infectiology and Public Health, Ghent University, Merelbeke, Belgium
| | - Narmada Venkateswaran
- GBADs programme, University of Liverpool, United Kingdom
- Department of Health Metrics Sciences, Institute for Health Metrics and Evaluation, University of Washington, Seattle, United States
| | - Christina Fastl
- GBADs programme, University of Liverpool, United Kingdom
- Department of Epidemiology and Public Health, Sciensano, Brussels, Belgium
| | - Sarah Gabriël
- Department of Translational Physiology, Infectiology and Public Health, Ghent University, Merelbeke, Belgium
| | - Delia Grace
- GBADs programme, University of Liverpool, United Kingdom
- Natural Resources Institute, University of Greenwich, Chatham Maritime, United Kingdom
- Animal and Human Health, International Livestock Research Institute, Nairobi, Kenya
| | - Arie H. Havelaar
- GBADs programme, University of Liverpool, United Kingdom
- Department of Animal Sciences, Emerging Pathogens Institute and Global Food Systems Institute, University of Florida, Gainesville, United States
| | - Ben Huntington
- GBADs programme, University of Liverpool, United Kingdom
- Institute of Infection, Veterinary and Ecological Sciences, University of Liverpool, UK
- Pengwern Animal Health Ltd, 259 Wallasey Village, Wallasey Wirral, Merseyside, United Kingdom
| | - Grace T. Patterson
- GBADs programme, University of Liverpool, United Kingdom
- Department of Population Medicine, Ontario Veterinary College, University of Guelph, Guelph, Ontario, Canada
| | - Jonathan Rushton
- GBADs programme, University of Liverpool, United Kingdom
- Institute of Infection, Veterinary and Ecological Sciences, University of Liverpool, UK
| | - Niko Speybroeck
- Insititute of Health and Society (IRSS), Université Catholique de Louvain, Woluwe-Saint-Lambert, Belgium
| | - Paul Torgerson
- GBADs programme, University of Liverpool, United Kingdom
- Section of Epidemiology, Vetsuisse Faculty, University of Zurich, Zurich, Switzerland
| | - David M. Pigott
- GBADs programme, University of Liverpool, United Kingdom
- Department of Health Metrics Sciences, Institute for Health Metrics and Evaluation, University of Washington, Seattle, United States
| | - Brecht Devleesschauwer
- GBADs programme, University of Liverpool, United Kingdom
- Department of Epidemiology and Public Health, Sciensano, Brussels, Belgium
- Department of Translational Physiology, Infectiology and Public Health, Ghent University, Merelbeke, Belgium
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Bernardo TM, Rushton J, Huntington B, Stacey DA, Raymond K, Bensassi N, Patterson GT. Informatics progress of the Global Burden of Animal Diseases programme towards data for One Health. REV SCI TECH OIE 2023; 42:218-229. [PMID: 37232302 DOI: 10.20506/rst.42.3365] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
The Global Burden of Animal Diseases (GBADs) programme will provide data-driven evidence that policy-makers can use to evaluate options, inform decisions, and measure the success of animal health and welfare interventions. The GBADs' Informatics team is developing a transparent process for identifying, analysing, visualising and sharing data to calculate livestock disease burdens and drive models and dashboards. These data can be combined with data on other global burdens (human health, crop loss, foodborne diseases) to provide a comprehensive range of information on One Health, required to address such issues as antimicrobial resistance and climate change. The programme began by gathering open data from international organisations (which are undergoing their own digital transformations). Efforts to achieve an accurate estimate of livestock numbers revealed problems in finding, accessing and reconciling data from different sources over time. Ontologies and graph databases are being developed to bridge data silos and improve the findability and interoperability of data. Dashboards, data stories, a documentation website and a Data Governance Handbook explain GBADs data, now available through an application programming interface. Sharing data quality assessments builds trust in such data, encouraging their application to livestock and One Health issues. Animal welfare data present a particular challenge, as much of this information is held privately and discussions continue regarding which data are the most relevant. Accurate livestock numbers are an essential input for calculating biomass, which subsequently feeds into calculations of antimicrobial use and climate change. The GBADs data are also essential to at least eight of the United Nations Sustainable Development Goals.
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Osorio EY, Uscanga-Palomeque A, Patterson GT, Cordova E, Travi BL, Soong L, Melby PC. Malnutrition-related parasite dissemination from the skin in visceral leishmaniasis is driven by PGE2-mediated amplification of CCR7-related trafficking of infected inflammatory monocytes. PLoS Negl Trop Dis 2023; 17:e0011040. [PMID: 36630476 PMCID: PMC9873180 DOI: 10.1371/journal.pntd.0011040] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2022] [Revised: 01/24/2023] [Accepted: 12/19/2022] [Indexed: 01/12/2023] Open
Abstract
People are infected with Leishmania donovani when the parasite is deposited in the dermis during the blood meal of the sand fly vector. Most infected people develop a subclinical latent infection, but some develop progressive visceral leishmaniasis. Malnutrition is a risk factor for the development of active VL. We previously demonstrated increased parasite dissemination from the skin to visceral organs in a murine model of malnutrition. Here we investigated the mechanism of early parasite dissemination. After delivery of L. donovani to the skin, we found enhanced capture of parasites by inflammatory monocytes and neutrophils in the skin of malnourished mice. However, parasite dissemination in malnourished mice was driven primarily by infected inflammatory monocytes, which showed increased CCR7 expression, greater intrinsic migratory capacity, and increased trafficking from skin to spleen. PGE2 production, which was increased at the site of skin infection, increased monocyte CCR7 expression and promoted CCR7-related monocyte-mediated early parasite dissemination in malnourished mice. Parasite dissemination in monocytes was reduced by inhibition of PGE2, knockdown or silencing of CCR7 in monocytes, and depletion of inflammatory monocytes through administration of diphtheria toxin to CSFR1-DTR transgenic mice that have monocyte-specific DT receptor expression. CCR7-driven trafficking of infected inflammatory monocytes through the lymph node was accompanied by increased expression of its ligands CCL19 and CCL21. These results show that the CCR7/PGE2 axis is responsible for the increased trafficking of L. donovani-infected inflammatory monocytes from the skin to the spleen in the malnourished host. Undernutrition and production of PGE2 are potential targets to reduce the risk of people developing VL. Nutritional interventions that target improved immune function and reduced PGE2 synthesis should be studied in people at risk of developing VL.
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Affiliation(s)
- E. Yaneth Osorio
- Department of Internal Medicine, University of Texas Medical Branch, Galveston, Texas, United States of America
- * E-mail: (PCM); (EYO)
| | - Ashanti Uscanga-Palomeque
- Department of Internal Medicine, University of Texas Medical Branch, Galveston, Texas, United States of America
| | - Grace T. Patterson
- Department of Microbiology and Immunology, University of Texas Medical Branch, Galveston, Texas, United States of America
| | - Erika Cordova
- Department of Internal Medicine, University of Texas Medical Branch, Galveston, Texas, United States of America
| | - Bruno L. Travi
- Department of Internal Medicine, University of Texas Medical Branch, Galveston, Texas, United States of America
- Department of Microbiology and Immunology, University of Texas Medical Branch, Galveston, Texas, United States of America
- Center for Tropical Diseases and Institute for Human Infection and Immunity, University of Texas Medical Branch, Galveston, Texas, United States of America
| | - Lynn Soong
- Department of Microbiology and Immunology, University of Texas Medical Branch, Galveston, Texas, United States of America
- Center for Tropical Diseases and Institute for Human Infection and Immunity, University of Texas Medical Branch, Galveston, Texas, United States of America
- Department of Pathology, University of Texas Medical Branch, Galveston, Texas, United States of America
| | - Peter C. Melby
- Department of Internal Medicine, University of Texas Medical Branch, Galveston, Texas, United States of America
- Department of Microbiology and Immunology, University of Texas Medical Branch, Galveston, Texas, United States of America
- Center for Tropical Diseases and Institute for Human Infection and Immunity, University of Texas Medical Branch, Galveston, Texas, United States of America
- Department of Pathology, University of Texas Medical Branch, Galveston, Texas, United States of America
- * E-mail: (PCM); (EYO)
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Di Bari C, Venkateswaran N, Bruce M, Fastl C, Huntington B, Patterson GT, Rushton J, Torgerson P, Pigott DM, Devleesschauwer B. Methodological choices in brucellosis burden of disease assessments: A systematic review. PLoS Negl Trop Dis 2022; 16:e0010468. [PMID: 36512611 PMCID: PMC9794075 DOI: 10.1371/journal.pntd.0010468] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2022] [Revised: 12/27/2022] [Accepted: 11/25/2022] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND Foodborne and zoonotic diseases such as brucellosis present many challenges to public health and economic welfare. Increasingly, researchers and public health institutes use disability-adjusted life years (DALYs) to generate a comprehensive comparison of the population health impact of these conditions. DALYs calculations, however, entail a number of methodological choices and assumptions, with data gaps and uncertainties to accommodate. Thisreview identifies existing brucellosis burden of disease studies and analyzes their methodological choices, assumptions, and uncertainties. It supports the Global Burden of Animal Diseases programme in the development of a systematic methodology to describe the impact of animal diseases on society, including human health. METHODS/PRINCIPAL FINDINGS A systematic search for brucellosis burden of disease calculations was conducted in pre-selected international and grey literature databases. Using a standardized reporting framework, we evaluated each estimate on a variety of key methodological assumptions necessary to compute a DALY. Fourteen studies satisfied the inclusion criteria (human brucellosis and quantification of DALYs). One study reported estimates at the global level, the rest were national or subnational assessments. Data regarding different methodological choices were extracted, including detailed assessments of the adopted disease models. Most studies retrieved brucellosis epidemiological data from administrative registries. Incidence data were often estimated on the basis of laboratory-confirmed tests. Not all studies included mortality estimates (Years of Life Lost) in their assessments due to lack of data or the assumption that brucellosis is not a fatal disease. Only two studies used a model with variable health states and corresponding disability weights. The rest used a simplified singular health state approach. Wide variation was seen in the duration chosen for brucellosis, ranging from 2 weeks to 4.5 years, irrespective of the whether a chronic state was included. CONCLUSION Available brucellosis burden of disease assessments vary widely in their methodology and assumptions. Further research is needed to better characterize the clinical course of brucellosis and to estimate case-fatality rates. Additionally, reporting of methodological choices should be improved to enhance transparency and comparability of estimates. These steps will increase the value of these estimates for policy makers.
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Affiliation(s)
- Carlotta Di Bari
- GBADs programme -, Liverpool, United Kingdom
- Department of Epidemiology and Public Health, Sciensano, Brussels, Belgium
- * E-mail:
| | - Narmada Venkateswaran
- GBADs programme -, Liverpool, United Kingdom
- Department of Health Metrics Sciences, Institute for Health Metrics and Evaluation, University of Washington, Seattle, Washington, United States of America
| | - Mieghan Bruce
- GBADs programme -, Liverpool, United Kingdom
- Centre for Biosecurity and One Health, School of Veterinary Medicine, Harry Butler Institute, Murdoch University, Perth, Western Australia
| | - Christina Fastl
- GBADs programme -, Liverpool, United Kingdom
- Department of Epidemiology and Public Health, Sciensano, Brussels, Belgium
| | - Ben Huntington
- GBADs programme -, Liverpool, United Kingdom
- Institute of Infection, Veterinary and Ecological Sciences, University of Liverpool, Liverpool, United Kingdom
- Pengwern Animal Health Ltd, Wallasey Wirral, Merseyside, United Kingdom
| | - Grace T. Patterson
- GBADs programme -, Liverpool, United Kingdom
- Department of Population Medicine, Ontario Veterinary College, University of Guelph, Guelph, Ontario, Canada
| | - Jonathan Rushton
- GBADs programme -, Liverpool, United Kingdom
- Institute of Infection, Veterinary and Ecological Sciences, University of Liverpool, Liverpool, United Kingdom
| | - Paul Torgerson
- GBADs programme -, Liverpool, United Kingdom
- Section of Epidemiology, Vetsuisse Faculty, University of Zurich, Zurich, Switzerland
| | - David M. Pigott
- GBADs programme -, Liverpool, United Kingdom
- Department of Health Metrics Sciences, Institute for Health Metrics and Evaluation, University of Washington, Seattle, Washington, United States of America
| | - Brecht Devleesschauwer
- GBADs programme -, Liverpool, United Kingdom
- Department of Epidemiology and Public Health, Sciensano, Brussels, Belgium
- Department of Translational Physiology, Infectiology and Public Health, Ghent University, Merelbeke, Belgium
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Osorio EY, Gugala Z, Patterson GT, Palacios G, Cordova E, Uscanga-Palomeque A, Travi BL, Melby PC. Inflammatory stimuli alter bone marrow composition and compromise bone health in the malnourished host. Front Immunol 2022; 13:846246. [PMID: 35983045 PMCID: PMC9380851 DOI: 10.3389/fimmu.2022.846246] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2021] [Accepted: 07/13/2022] [Indexed: 11/13/2022] Open
Abstract
Inflammation has a role in the pathogenesis of childhood malnutrition. We investigated the effect of malnutrition and inflammatory challenge on bone marrow composition and bone health. We studied an established murine model of moderate acute malnutrition at baseline and after acute inflammatory challenge with bacterial lipopolysaccharide (LPS), a surrogate of Gram-negative bacterial sepsis, or Leishmania donovani, the cause of visceral leishmaniasis. Both of these infections cause significant morbidity and mortality in malnourished children. Of the 2 stimuli, LPS caused more pronounced bone marrow changes that were amplified in malnourished mice. LPS challenge led to increased inflammatory cytokine expression (Il1b, Il6, and Tnf), inflammasome activation, and inflammatory monocyte accumulation in the bone marrow of malnourished mice. Depletion of inflammatory monocytes in Csfr1-LysMcre-DT malnourished mice significantly reduced the inflammasome activation and IL1-ß production after LPS challenge. The inflammatory challenge also led to increased expansion of mesenchymal stem cells (MSCs), bone marrow adiposity, and expression of genes (Pparg, Adipoq, and Srbp1) associated with adipogenesis in malnourished mice. This suggests that inflammatory challenge promotes differentiation of BM MSCs toward the adipocyte lineage rather than toward bone-forming osteoblasts in the malnourished host. Concurrent with this reduced osteoblastic potential there was an increase in bone-resorbing osteoclasts, enhanced osteoclast activity, upregulation of inflammatory genes, and IL-1B involved in osteoclast differentiation and activation. The resulting weakened bone formation and increased bone resorption would contribute to the bone fragility associated with malnutrition. Lastly, we evaluated the effect of replacing lipid rich in omega-6 fatty acids (corn oil) with lipid-rich in omega-3 fatty acids (fish oil) in the nutrient-deficient diet. LPS-challenged malnourished mice that received dietary fish oil showed decreased expression of inflammatory cytokines and Rankl and reduced osteoclast differentiation and activation in the bone marrow. This work demonstrates that the negative effect of inflammatory challenge on bone marrow is amplified in the malnourished host. Increasing dietary intake of omega-3 fatty acids may be a means to reduce inflammation and improve bone health in malnourished children.
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Affiliation(s)
- E. Yaneth Osorio
- Department of Internal Medicine, Division of Infectious Diseases, University of Texas Medical Branch, Galveston, TX, United States
- *Correspondence: Peter C. Melby, ; E. Yaneth Osorio,
| | - Zbigniew Gugala
- Department of Orthopedic Surgery and Rehabilitation, The University of Texas Medical Branch, Galveston, TX, United States
| | - Grace T. Patterson
- Department of Internal Medicine, Division of Infectious Diseases, University of Texas Medical Branch, Galveston, TX, United States
| | - Genesis Palacios
- Department of Parasitology, Universidad de la Laguna, San Cristóbal de La Laguna, Spain
| | - Erika Cordova
- Department of Internal Medicine, Division of Infectious Diseases, University of Texas Medical Branch, Galveston, TX, United States
| | - Ashanti Uscanga-Palomeque
- Department of Internal Medicine, Division of Infectious Diseases, University of Texas Medical Branch, Galveston, TX, United States
| | - Bruno L. Travi
- Department of Internal Medicine, Division of Infectious Diseases, University of Texas Medical Branch, Galveston, TX, United States
- Department of Microbiology and Immunology, University of Texas Medical Branch, Galveston, TX, United States
- Center for Tropical Diseases and Institute for Human Infection and Immunity, University of Texas Medical Branch, Galveston, TX, United States
| | - Peter C. Melby
- Department of Internal Medicine, Division of Infectious Diseases, University of Texas Medical Branch, Galveston, TX, United States
- Department of Microbiology and Immunology, University of Texas Medical Branch, Galveston, TX, United States
- Center for Tropical Diseases and Institute for Human Infection and Immunity, University of Texas Medical Branch, Galveston, TX, United States
- Department of Pathology, University of Texas Medical Branch, Galveston, TX, United States
- *Correspondence: Peter C. Melby, ; E. Yaneth Osorio,
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Patterson GT, Osorio EY, Peniche A, Dann SM, Cordova E, Preidis GA, Suh JH, Ito I, Saldarriaga OA, Loeffelholz M, Ajami NJ, Travi BL, Melby PC. Pathologic Inflammation in Malnutrition Is Driven by Proinflammatory Intestinal Microbiota, Large Intestine Barrier Dysfunction, and Translocation of Bacterial Lipopolysaccharide. Front Immunol 2022; 13:846155. [PMID: 35720380 PMCID: PMC9204284 DOI: 10.3389/fimmu.2022.846155] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2021] [Accepted: 04/20/2022] [Indexed: 12/12/2022] Open
Abstract
Acute malnutrition, or wasting, is implicated in over half of all deaths in children under five and increases risk of infectious disease. Studies in humans and preclinical models have demonstrated that malnutrition is linked to an immature intestinal microbiota characterized by increased prevalence of Enterobacteriaceae. Observational studies in children with moderate acute malnutrition (MAM) have also observed heightened systemic inflammation and increased circulating bacterial lipopolysaccharides (LPS; endotoxin). However, the mechanisms that underpin the systemic inflammatory state and endotoxemia, and their pathophysiological consequences, remain uncertain. Understanding these pathophysiological mechanisms is necessary to design targeted treatments that will improve the unacceptable rate of failure or relapse that plague current approaches. Here we use a mouse model of MAM to investigate the mechanisms that promote inflammation in the malnourished host. We found that mice with MAM exhibited increased systemic inflammation at baseline, increased translocation of bacteria and bacterial LPS, and an exaggerated response to inflammatory stimuli. An exaggerated response to bacterial LPS was associated with increased acute weight loss. Remarkably, intestinal inflammation and barrier dysfunction was found in the cecum and colon. The cecum showed a dysbiotic microbiota with expansion of Gammaproteobacteria and some Firmicutes, and contraction of Bacteroidetes. These changes were paralleled by an increase in fecal LPS bioactivity. The inflammatory phenotype and weight loss was modulated by oral administration of non-absorbable antibiotics that altered the proportion of cecal Gammaproteobacteria. We propose that the heightened inflammation of acute malnutrition is the result of changes in the intestinal microbiota, intestinal barrier dysfunction in the cecum and colon, and increased systemic exposure to LPS.
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Affiliation(s)
- Grace T Patterson
- Division of Infectious Diseases, Department of Internal Medicine, University of Texas Medical Branch, Galveston, TX, United States.,Department of Microbiology and Immunology, University of Texas Medical Branch, Galveston, TX, United States
| | - Elvia Y Osorio
- Division of Infectious Diseases, Department of Internal Medicine, University of Texas Medical Branch, Galveston, TX, United States
| | - Alex Peniche
- Division of Infectious Diseases, Department of Internal Medicine, University of Texas Medical Branch, Galveston, TX, United States
| | - Sara M Dann
- Division of Infectious Diseases, Department of Internal Medicine, University of Texas Medical Branch, Galveston, TX, United States.,Department of Microbiology and Immunology, University of Texas Medical Branch, Galveston, TX, United States.,Center for Tropical Diseases, University of Texas Medical Branch, Galveston, TX, United States
| | - Erika Cordova
- Division of Infectious Diseases, Department of Internal Medicine, University of Texas Medical Branch, Galveston, TX, United States
| | - Geoffrey A Preidis
- Division of Gastroenterology, Hepatology, & Nutrition, Department of Pediatrics, Baylor College of Medicine and Texas Children's Hospital, Houston, TX, United States
| | - Ji Ho Suh
- Division of Gastroenterology, Hepatology, & Nutrition, Department of Pediatrics, Baylor College of Medicine and Texas Children's Hospital, Houston, TX, United States
| | - Ichiaki Ito
- Division of Infectious Diseases, Department of Internal Medicine, University of Texas Medical Branch, Galveston, TX, United States
| | - Omar A Saldarriaga
- Department of Pathology, University of Texas Medical Branch, Galveston, TX, United States
| | - Michael Loeffelholz
- Department of Pathology, University of Texas Medical Branch, Galveston, TX, United States
| | - Nadim J Ajami
- The Alkek Center for Metagenomics and Microbiome Research, Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX, United States
| | - Bruno L Travi
- Division of Infectious Diseases, Department of Internal Medicine, University of Texas Medical Branch, Galveston, TX, United States.,Center for Tropical Diseases, University of Texas Medical Branch, Galveston, TX, United States
| | - Peter C Melby
- Division of Infectious Diseases, Department of Internal Medicine, University of Texas Medical Branch, Galveston, TX, United States.,Department of Microbiology and Immunology, University of Texas Medical Branch, Galveston, TX, United States.,Center for Tropical Diseases, University of Texas Medical Branch, Galveston, TX, United States
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Patterson GT, Manthi D, Osuna F, Muia A, Olack B, Mbuchi M, Saldarriaga OA, Ouma L, Inziani M, Yu X, Otieno P, Melby PC. Environmental, Metabolic, and Inflammatory Factors Converge in the Pathogenesis of Moderate Acute Malnutrition in Children: An Observational Cohort Study. Am J Trop Med Hyg 2021; 104:1877-1888. [PMID: 33755580 PMCID: PMC8103470 DOI: 10.4269/ajtmh.20-0963] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2020] [Accepted: 01/07/2021] [Indexed: 01/04/2023] Open
Abstract
Acute malnutrition affects more than 50 million children worldwide. These children are at an increased risk of morbidity and mortality from infectious disease. However, the pathogenesis of acute malnutrition and mechanisms underlying the increased risk and poor outcomes from infection are not well understood. Our objective was to identify differences in inflammation and inflammatory responses between children with moderate acute malnutrition (MAM) and healthy controls (HCs), and search for environmental, pathophysiological, and metabolic factors that may influence this response. Sixteen children with MAM and 16 HCs aged 18-36 months were studied in Nairobi, Kenya. None of the children had symptoms of an infectious disease (fever, diarrhea, or cough) in the 2 weeks before enrollment and sample collection. Demographic and health data were provided by their primary caregivers. Blood samples were collected to measure various biomarkers and the response to an inflammatory stimulus. Children with MAM were more frequently from households with contaminated water, crowding, and unstable income sources. They also had increases in basal inflammation, circulating bacterial lipopolysaccharide (LPS), markers of intestinal damage, and an exaggerated whole blood inflammatory response to LPS. Metabolic changes in children with MAM led to increased plasma levels of long-chain fatty acids, which were found to contribute to the pro-inflammatory state. These exploratory findings suggest convergence of multiple factors to promote dysregulated inflammatory responses and prompt several mechanistic hypotheses that can be pursued to better understand the pathogenesis of MAM.
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Affiliation(s)
- Grace T. Patterson
- Department of Internal Medicine and Infectious Disease, University of Texas Medical Branch, Galveston, Texas
| | - Dennis Manthi
- Centre for Clinical Research, Kenya Medical Research Institute, Nairobi, Kenya
| | - Finnley Osuna
- Centre for Clinical Research, Kenya Medical Research Institute, Nairobi, Kenya
| | - Alfred Muia
- Centre for Clinical Research, Kenya Medical Research Institute, Nairobi, Kenya
| | - Beatrice Olack
- Centre for Clinical Research, Kenya Medical Research Institute, Nairobi, Kenya
| | - Margaret Mbuchi
- Centre for Clinical Research, Kenya Medical Research Institute, Nairobi, Kenya
| | - Omar A. Saldarriaga
- Department of Internal Medicine and Infectious Disease, University of Texas Medical Branch, Galveston, Texas
| | - Linet Ouma
- Centre for Clinical Research, Kenya Medical Research Institute, Nairobi, Kenya
| | - Mary Inziani
- Centre for Clinical Research, Kenya Medical Research Institute, Nairobi, Kenya
| | - Xiaoying Yu
- Department of Preventative Medicine and Population Health, University of Texas Medical Branch, Galveston, Texas
| | - Phelgona Otieno
- Centre for Clinical Research, Kenya Medical Research Institute, Nairobi, Kenya;,Address correspondence to Phelgona Otieno, Kenya Medical Research Institute, Mbagathi Road, Nairobi, Kenya, E-mail: or Peter C. Melby, Department of Internal Medicine and Infectious Disease, University of Texas Medical Branch, 301 University Boulevard, Galveston, TX 77550, E-mail:
| | - Peter C. Melby
- Department of Internal Medicine and Infectious Disease, University of Texas Medical Branch, Galveston, Texas;,Address correspondence to Phelgona Otieno, Kenya Medical Research Institute, Mbagathi Road, Nairobi, Kenya, E-mail: or Peter C. Melby, Department of Internal Medicine and Infectious Disease, University of Texas Medical Branch, 301 University Boulevard, Galveston, TX 77550, E-mail:
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Patterson EI, Elia G, Grassi A, Giordano A, Desario C, Medardo M, Smith SL, Anderson ER, Prince T, Patterson GT, Lorusso E, Lucente MS, Lanave G, Lauzi S, Bonfanti U, Stranieri A, Martella V, Solari Basano F, Barrs VR, Radford AD, Agrimi U, Hughes GL, Paltrinieri S, Decaro N. Evidence of exposure to SARS-CoV-2 in cats and dogs from households in Italy. Nat Commun 2020; 11:6231. [PMID: 33277505 PMCID: PMC7718263 DOI: 10.1038/s41467-020-20097-0] [Citation(s) in RCA: 237] [Impact Index Per Article: 59.3] [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: 08/04/2020] [Accepted: 11/13/2020] [Indexed: 01/20/2023] Open
Abstract
SARS-CoV-2 emerged from animals and is now easily transmitted between people. Sporadic detection of natural cases in animals alongside successful experimental infections of pets, such as cats, ferrets and dogs, raises questions about the susceptibility of animals under natural conditions of pet ownership. Here, we report a large-scale study to assess SARS-CoV-2 infection in 919 companion animals living in northern Italy, sampled at a time of frequent human infection. No animals tested PCR positive. However, 3.3% of dogs and 5.8% of cats had measurable SARS-CoV-2 neutralizing antibody titers, with dogs from COVID-19 positive households being significantly more likely to test positive than those from COVID-19 negative households. Understanding risk factors associated with this and their potential to infect other species requires urgent investigation.
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Affiliation(s)
- E I Patterson
- Centre for Neglected Tropical Disease, Departments of Vector Biology and Tropical Disease Biology, Liverpool School of Tropical Medicine, Pembroke Place, Liverpool, L3 5QA, UK
| | - G Elia
- Department of Veterinary Medicine, University of Bari Aldo Moro, Strada Prov. per Casamassima Km 3, 70010, Valenzano, BA, Italy
| | - A Grassi
- I-VET srl, Laboratorio di Analisi Veterinarie, Via Ettore Majorana, 10 - 25020, Flero, BS, Italy
| | - A Giordano
- Department of Veterinary Medicine, Veterinary Teaching Hospital, University of Milan, Via dell'Università 6, 26900, Lodi, Italy
| | - C Desario
- Department of Veterinary Medicine, University of Bari Aldo Moro, Strada Prov. per Casamassima Km 3, 70010, Valenzano, BA, Italy
| | - M Medardo
- La Vallonèa Veterinary Diagnostic Laboratory, via G. Sirtori 9, 20017, Passirana di Rho, MI, Italy
| | - S L Smith
- Institute of Infection, Veterinary and Ecological Sciences, University of Liverpool, Leahurst Campus, Chester High Road, Neston, CH64 7TE, UK
| | - E R Anderson
- Centre for Neglected Tropical Disease, Departments of Vector Biology and Tropical Disease Biology, Liverpool School of Tropical Medicine, Pembroke Place, Liverpool, L3 5QA, UK
| | - T Prince
- NIHR Health Protection Unit in Emerging and Zoonotic Infections, Department of Clinical Infection, Microbiology and Immunology, University of Liverpool, Liverpool, UK
| | - G T Patterson
- Institute of Infection, Veterinary and Ecological Sciences, University of Liverpool, Leahurst Campus, Chester High Road, Neston, CH64 7TE, UK
| | - E Lorusso
- Department of Veterinary Medicine, University of Bari Aldo Moro, Strada Prov. per Casamassima Km 3, 70010, Valenzano, BA, Italy
| | - M S Lucente
- Department of Veterinary Medicine, University of Bari Aldo Moro, Strada Prov. per Casamassima Km 3, 70010, Valenzano, BA, Italy
| | - G Lanave
- Department of Veterinary Medicine, University of Bari Aldo Moro, Strada Prov. per Casamassima Km 3, 70010, Valenzano, BA, Italy
| | - S Lauzi
- Department of Veterinary Medicine, Veterinary Teaching Hospital, University of Milan, Via dell'Università 6, 26900, Lodi, Italy
| | - U Bonfanti
- La Vallonèa Veterinary Diagnostic Laboratory, via G. Sirtori 9, 20017, Passirana di Rho, MI, Italy
| | - A Stranieri
- Department of Veterinary Medicine, Veterinary Teaching Hospital, University of Milan, Via dell'Università 6, 26900, Lodi, Italy
| | - V Martella
- Department of Veterinary Medicine, University of Bari Aldo Moro, Strada Prov. per Casamassima Km 3, 70010, Valenzano, BA, Italy
| | - F Solari Basano
- Arcoblu s.r.l., via Alessandro Milesi 5, 20133, Milan, Italy
| | - V R Barrs
- City University's Jockey Club College of Veterinary Medicine and Life Sciences, 5/F, Block 1A, To Yuen Building, 31 To Yuen Street, Kowloon, Hong Kong
| | - A D Radford
- Institute of Infection, Veterinary and Ecological Sciences, University of Liverpool, Leahurst Campus, Chester High Road, Neston, CH64 7TE, UK
| | - U Agrimi
- Department of Food Safety, Nutrition and Veterinary Public Health, Istituto Superiore di Sanità, Viale Regina Elena, 299, 00161, Rome, Italy
| | - G L Hughes
- Centre for Neglected Tropical Disease, Departments of Vector Biology and Tropical Disease Biology, Liverpool School of Tropical Medicine, Pembroke Place, Liverpool, L3 5QA, UK
| | - S Paltrinieri
- Department of Veterinary Medicine, Veterinary Teaching Hospital, University of Milan, Via dell'Università 6, 26900, Lodi, Italy
| | - N Decaro
- Department of Veterinary Medicine, University of Bari Aldo Moro, Strada Prov. per Casamassima Km 3, 70010, Valenzano, BA, Italy.
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10
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Patterson GT, Thomas LF, Coyne LA, Rushton J. Moving health to the heart of agri-food policies; mitigating risk from our food systems. Glob Food Sec 2020; 26:100424. [PMID: 32904586 PMCID: PMC7456577 DOI: 10.1016/j.gfs.2020.100424] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/13/2020] [Revised: 07/09/2020] [Accepted: 08/15/2020] [Indexed: 01/15/2023]
Abstract
Our food systems are progressively more industrialized and consolidated with many modern food value chains involving multiple countries and continents, and as such being associated with changes in risk profile and impacts of emerging and re-emerging diseases. Disease outbreaks that sweep through a single region can have massive impacts on food supply, while severe outbreaks of human pathogens can disrupt agricultural labor supply or demand for products perceived as 'unsafe'. Market pressures have generally rewarded production of cash crops for fuel and energy dense, low nutrient processed foods over production of fruits and vegetables for local consumption. Climbing rates of food-related NCDs and pre-existing conditions leave the population increasingly susceptible to infectious diseases that are often driven by or arise from the food system. Therefore disease and diet from our food systems cause impacts on human health, and human health issues can impact on the functioning of the food system. The COVID-19 outbreak is the most recent example of food system driven disease emergence and of massive supply and demand shocks in the food system, experienced as a direct and indirect result of this disease. The effects of the food system on disease spread (and vice versa) must be addressed in future plans to prevent and mitigate large scale outbreaks. Health policies must acknowledge the food system as the base of our health system, as must agri-food policy recognize the pre-eminence of human health (directly and indirectly) in decision making.
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Affiliation(s)
- Grace T Patterson
- Institute of Infection, Veterinary and Ecological Sciences, University of Liverpool, Liverpool, UK
| | - Lian F Thomas
- Institute of Infection, Veterinary and Ecological Sciences, University of Liverpool, Liverpool, UK
- International Livestock Research Institute, PO Box 30709, Nairobi, 00100, UK
| | - Lucy A Coyne
- Institute of Infection, Veterinary and Ecological Sciences, University of Liverpool, Liverpool, UK
| | - Jonathan Rushton
- Institute of Infection, Veterinary and Ecological Sciences, University of Liverpool, Liverpool, UK
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11
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Patterson EI, Elia G, Grassi A, Giordano A, Desario C, Medardo M, Smith SL, Anderson ER, Prince T, Patterson GT, Lorusso E, Lucente MS, Lanave G, Lauzi S, Bonfanti U, Stranieri A, Martella V, Basano FS, Barrs VR, Radford AD, Agrimi U, Hughes GL, Paltrinieri S, Decaro N. Evidence of exposure to SARS-CoV-2 in cats and dogs from households in Italy. bioRxiv 2020. [PMID: 32743588 DOI: 10.1101/2020.07.21.214346] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
SARS-CoV-2 originated in animals and is now easily transmitted between people. Sporadic detection of natural cases in animals alongside successful experimental infections of pets, such as cats, ferrets and dogs, raises questions about the susceptibility of animals under natural conditions of pet ownership. Here we report a large-scale study to assess SARS-CoV-2 infection in 817 companion animals living in northern Italy, sampled at a time of frequent human infection. No animals tested PCR positive. However, 3.4% of dogs and 3.9% of cats had measurable SARS-CoV-2 neutralizing antibody titers, with dogs from COVID-19 positive households being significantly more likely to test positive than those from COVID-19 negative households. Understanding risk factors associated with this and their potential to infect other species requires urgent investigation. One Sentence Summary SARS-CoV-2 antibodies in pets from Italy.
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12
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Abstract
This study examined the effects of demographic factors on coping responses among police officers. A sample of 233 police officers completed the Ways of Coping Questionnaire (Folkman & Lazarus, 1988). The regression analysis showed that the higher the reported educational attainment, the more police officers reported coping which was emotion-focused and seeking social support. The rank of the officer was directly related to reported emotion-focused coping. These results are discussed relative to research on the relations of demographic factors and coping responses among police officers.
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Affiliation(s)
- G T Patterson
- Shirley M. Ehrenkranz School of Social Work, New York University, New York 10003, USA
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13
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Abstract
In planning mandibular distraction, the deficiency of the vertical ramus and body is measured. The position of the pin placement is evaluated by the following formula: [formula: see text] This is more accurately presented by the new formula. [formula: see text] In one patient the original formula evaluated the pin placement angle to be 9.94, compared with 9.92, in the more accurate but more complex new formula. When the gonial angle is obtuse, the difference is small. When the gonial angle is more acute, as in a normal gonial angle for a 2-year-old child--134 degrees--the difference is still only 0.1 degree. The original formula is simpler to use and is accurate enough for clinical use in mandibular distraction. The distraction distance is not the sum of the vertical ramal deficiency plus the body deficiency but is given by the following formula: [formula: see text] It would be accurate enough to plan the total distraction distance to be less than the sum of the two distances. The more acute the gonial angle is, the less the distraction distance will need to be.
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Affiliation(s)
- H W Losken
- Division of Plastic and Reconstructive Surgery, University of Pittsburgh, PA, USA
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14
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Abstract
Normal lengths of the vertical ramus, body, and angle of the mandible at different ages are presented. Before mandibular distraction is embarked on, the extent of the deficiency of the mandible is assessed. The length of the vertical ramus and body are measured on cephalometric radiographs or three-dimensional computed tomography (3D CT) scans. Deficiency of the length of the mandible is calculated. The position of the pin placement angle (from the horizontal ramus) is calculated by means of the following formula: 180 degrees minus mandibular angle times vertical ramus deficiency divided by total deficiency. Placing the pins correctly will result in correction of the vertical ramus and body deficiency of the mandible and the excessively obtuse angle of the mandible will become more acute.
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Affiliation(s)
- H W Losken
- Division of Plastic and Reconstructive Surgery, University of Pittsburgh, PA, USA
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15
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Abstract
Atypical facial pain (AFP) is characterized by a constant, poorly defined anatomically aching pain, lacking the paroxysmal quality, trigger point activation, and well-defined anatomical distribution of trigeminal neuralgia. This study examines a set of AFP patients with respect to their responses to external decompression (4 patients) and neurectomy (11 patients). Criteria for trigeminal nerve exploration were: failure of non-operative treatments, the ability to control pain temporarily with local anesthetic nerve blocks, and pain generally located within the anatomical distribution of the affected nerve. Decision as whether to perform an external decompression or neurectomy was based on gross anatomical findings during exploration. A retrospective interview was conducted to evaluate the effects of the chosen procedure in regard to subjective level of pain, freedom from restrictions placed on activities of daily living, and past medical history, including history of the facial pain. The neurectomy procedure (p = 0.022), medical history of autoimmune disease (p = 0.004), and preoperative pain distribution on the left side (p = 0.042), were all found to have a positive effect on outcome. History of psychiatric treatment (p = 0.055) and preoperative affected activities of daily living (p = 0.026) significantly adversely affected the outcome.
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Affiliation(s)
- V B Ziccardi
- Department of Oral and Maxillofacial Surgery, University of Pittsburgh
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16
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17
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Ziccardi VB, Misch C, Patterson GT, Nawrocki JS. Use of endosseous implants to fixate a surgical stent in conjunction with mandibular vestibuloplasty. Compendium 1993; 14:774-779. [PMID: 8221751] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Affiliation(s)
- V B Ziccardi
- Department of Oral and Maxillofacial Surgery, University of Pittsburgh, Pennsylvania
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18
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Ziccardi VB, Corcoran TP, Sotereanos GC, Patterson GT. Aspiration of two dental units resulting from a motor vehicle accident. Oral Surg Oral Med Oral Pathol 1993; 75:535-6. [PMID: 8464625 DOI: 10.1016/0030-4220(93)90188-a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- V B Ziccardi
- Presbyterian-University Hospital, Department of Surgery, Pittsburgh, PA 15261
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19
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Ziccardi VB, Patterson GT, Ramasastry S, Sotereanos GC. Management of a severe zygomatico-orbital fracture with dislocation of the globe into the antrum. J Craniofac Surg 1993; 4:95-101. [PMID: 8324090 DOI: 10.1097/00001665-199304000-00009] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [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: 01/29/2023] Open
Abstract
A patient with severe orbital facial trauma with complete dislocation of the globe into the maxillary antrum is presented. Reconstruction of the defect with autogenous bone restored globe position and maintained the visual and ocular-rotary function of the eye.
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Affiliation(s)
- V B Ziccardi
- Department of Surgery, Division of Plastic Surgery, University of Pittsburgh, PA 15261
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20
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Affiliation(s)
- V B Ziccardi
- Department of Surgery, University of Pittsburgh, PA 16251
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Ziccardi VB, Lalikos JF, Sotereanos GC, Patterson GT. Retroperitoneal hematoma as a complication of anterior iliac crest harvest: report of a case. J Oral Maxillofac Surg 1992; 50:1113-6. [PMID: 1527667 DOI: 10.1016/0278-2391(92)90503-r] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- V B Ziccardi
- Department of Surgery, University of Pittsburgh, Presbyterian-University Hospital, PA
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22
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Patterson GT, Ziccardi VB, Jannetta PJ, Sotereanos GC. Idiopathic trigeminal neuralgia complicated by lingual nerve dysesthesia. Oral Surg Oral Med Oral Pathol 1992; 74:282-4. [PMID: 1407986 DOI: 10.1016/0030-4220(92)90059-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
The treatment of facial pain disorders has become a multifaceted discipline that involves numerous scientific fields. Diagnostic and treatment modalities may be beneficial to the patient but at times may also complicate the problem and compromise the outcome. We present an interesting case of left trigeminal neuralgia complicated by unassociated lingual nerve dysesthesia.
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23
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Ziccardi VB, Abubaker AO, Sotereanos GC, Patterson GT. Precipitation of an Addisonian crisis during dental surgery: recognition and management. Compendium 1992; 13:518, 520, 522-4. [PMID: 1387835] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- V B Ziccardi
- University of Pittsburgh, Presbyterian-University Hospital
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24
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Affiliation(s)
- W Ozaki
- Department of Oral and Maxillofacial Surgery, School of Medicine, University of Pittsburgh, PA
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25
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Abstract
Multiple surgical approaches to the orbits with the use of the eyelids have been used. The orbital rim incision fell into disfavor because of esthetic considerations. A subciliary approach supplemented by the lateral brow incision is currently the most popular method of approach to the orbital rim. It provides adequate access to the orbit, but it is not without inherent complications, such as unfavorable scarring, ectropion, and entropion. This article describes an alternate approach to the orbit by means of a transconjunctival incision with lateral canthotomy.
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Affiliation(s)
- H Hadeed
- Department of Surgery, Presbyterian University Hospital, University of Pittsburgh, Pa
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26
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Ziccardi VB, Corcoran TP, Sotereanos GC, Patterson GT. Misinterpretation of normal radiographic anatomy for mandibular fractures. Am J Emerg Med 1992; 10:265-6. [PMID: 1586443 DOI: 10.1016/0735-6757(92)90227-o] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
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27
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Ziccardi VB, Patterson GT, Jannetta PJ, Sotereanos GC. Technical innovation: transfacial approach for infraorbital nerve exploration and orbital-maxillary surgery. Oral Surg Oral Med Oral Pathol 1991; 72:655-9. [PMID: 1812445 DOI: 10.1016/0030-4220(91)90005-w] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
A transfacial approach for infraorbital nerve exploration and maxillary surgery has been developed, allowing for good visual access as far posteriorly as the foramen rotundum and anterior maxillary region. This allows for infraorbital osteotomies, peripheral nerve grafting, neurolysis procedures, or combined maxillofacial-neurosurgical procedures with gasserian ganglion exploration and/or grafting. The procedure affords maximum surgical accessibility with good postoperative healing and minimal concerns about potential oral contamination.
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Affiliation(s)
- V B Ziccardi
- Presbyterian University Hospital, Department of Surgery, Pittsburgh, PA 15261
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Carstens MH, Stofman GM, Hurwitz DJ, Futrell JW, Patterson GT, Sotereanos GC. The buccinator myomucosal island pedicle flap: anatomic study and case report. Plast Reconstr Surg 1991; 88:39-50; discussion 51-2. [PMID: 2052660] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The buccinator myomucosal island pedicle flap is a useful means of introducing relatively large amounts of vascularized mucosa into the oral cavity. Using cadaver dissections and clinical cases, the anatomy and clinical relevance of this tissue are defined. Emphasis is placed on the technical caveats and pitfalls of the procedure.
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Affiliation(s)
- M H Carstens
- Division of Plastic Surgery, University of Pittsburgh, PA 15213
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29
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Gupta RC, Patterson GT, Dettbarn WD. Comparison of cholinergic and neuromuscular toxicity following acute exposure to sarin and VX in rat. Fundam Appl Toxicol 1991; 16:449-58. [PMID: 1855618 DOI: 10.1016/0272-0590(91)90085-i] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Male Sprague-Dawley rats injected with a sublethal sc dosage of 110 micrograms/kg of sarin (isopropyl methylphosphonofluoridate), or 12 micrograms/kg of VX (S-(2-diisopropylaminoethyl) O-ethyl methylphosphonothioate), developed severe toxic signs within 5-15 min after sarin and 20-50 min after VX lasting for 5 to 7 hr. Myonecrotic lesions were seen in soleus and diaphragm muscles within 1 hr. A maximum number of lesions had developed after 24 hr, and lesions were also present in extensor digitorum longus (EDL) at this time. Regeneration of muscle fibers was slow since lesions were still evident past 7 days of treatment. Within 1 hr following VX, AChE activity was reduced to 8, 12, and 17% of control activity in soleus, diaphragm, and EDL, respectively, whereas with sarin the enzyme activity was reduced to 23, 48, and 82% of control. A still greater inhibition was seen 24 hr after sarin when AChE activity was reduced to 19, 13, and 43% in these muscles. In skeletal muscles the different molecular forms of AChE, such as 16 S, 12 S, 10 S, and 4 S vary in location and functional importance with the 16 S form highly concentrated at the neuromuscular junction. All forms in a given muscle were equally sensitive to the inhibitors. In EDL, sarin was the least effective in reducing AChE or its molecular forms. In the brain structures (cortex, brain stem, striatum, and hippocampus), AChE activity was reduced to 1-6% of control by sarin and VX with the exception that following VX striatal AChE was reduced to only 41% of control activity. AChE activity in the brain cortex following either of the agents was maximally affected (1%). A slow but significant recovery of brain AChE was evident after 24 hr and more so after Day 7. Butyrylcholinesterase (BuChE) activity was less sensitive to inhibition by both inhibitors compared to AChE activity and showed a rapid recovery. Based on the equitoxic doses (toxic signs of similar magnitude), VX was found to be 10 times more toxic than sarin. The mechanisms of this disparity may be due to differences in rate of uptake, circulation, susceptibility to hydrolysis, and reactivity with nonspecific binding sites.
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Affiliation(s)
- R C Gupta
- Department of Pharmacology, School of Medicine, Vanderbilt University, Nashville, Tennessee 37232
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30
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Tartan BF, Sotereanos GC, Patterson GT, Giuliani MJ. Use of the pharyngeal flap with temporalis muscle for reconstruction of the unrepaired adult palatal cleft: report of two cases. J Oral Maxillofac Surg 1991; 49:422-5. [PMID: 2005500 DOI: 10.1016/0278-2391(91)90385-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- B F Tartan
- Division of Oral-Maxillofacial Surgery, University of Pittsburgh, PA 15261
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31
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Affiliation(s)
- H H Hadeed
- Department of Oral-Maxillofacial Surgery, Presbyterian-University Hospital, University of Pittsburgh, PA 15261
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Ziccardi VB, Russavage J, Sotereanos GC, Patterson GT. Oculocardiac reflex: pathophysiology and case report. Oral Surg Oral Med Oral Pathol 1991; 71:137-8. [PMID: 2003005 DOI: 10.1016/0030-4220(91)90453-j] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- V B Ziccardi
- Department of Surgery, Presbyterian-University Hospital, Pittsburgh, Pa
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Ziccardi VB, Abubaker AO, Sotereanos GC, Patterson GT. Maxillofacial considerations in orthotopic liver transplantation. Oral Surg Oral Med Oral Pathol 1991; 71:21-6. [PMID: 1704494 DOI: 10.1016/0030-4220(91)90514-d] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Orthotopic liver transplantation is now a widely used treatment for patients with end-stage liver disease. Lifelong pharmacologic immunosuppression renders these patients susceptible to many infections. The purpose of this article is to provide guidelines for treating the patient with end-stage liver disease, both before and after transplantation. In addition, we shall discuss some of the medical implications associated with end-stage liver disease and their clinical presentations and appropriate presurgical management. Adverse side effects of long-term immunosuppression and their effect on the oral and maxillofacial region shall also be discussed. Last, a brief discussion of FK506, the latest immunosuppressant, will be presented together with the implications of its use on our surgical treatment of these patients.
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Affiliation(s)
- V B Ziccardi
- Department of Oral and Maxillofacial Surgery, University of Pittsburgh, Presbyterian University Hospital
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Abstract
The coronal approach is a versatile surgical technique to expose the craniofacial skeleton. A retrospective clinical study on the use of this approach in treatment of craniomaxillofacial trauma in 28 patients was carried out. The study showed that this technique provides optimum exposure of the fracture sites, allowing for accurate anatomic reduction and fixation of the fractured segments and good cosmetic results in the incision site. The surgical technique, indications, and management and prevention of potential complications of the coronal approach are discussed.
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Affiliation(s)
- A O Abubaker
- Division of Oral and Maxillofacial Surgery, Presbyterian-University Hospital, Pittsburgh, PA 15261
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Affiliation(s)
- C A Skouteris
- Department of Oral and Maxillofacial Surgery, Presbyterian-University Hospital, Pittsburgh, Pennsylvania
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Abstract
A new method of facial identification--Face Imaging Reconstructive Morphography (FIRM)--is herein described. This method permits the construction of objective composites of facial features based on precise cephalometric measurements. The anthropometric measurements are derived from radiographic films taken by the Analytic Morphograph (KLS). FIRM is a rapid, objective, and reproducible method that is distinctly better than the current methods of forensic-anthropological identification.
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Affiliation(s)
- J A Perper
- Department of Pathology, University of Pittsburgh School of Medicine, Pennsylvania
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Abstract
The objective of the present investigation was to assess the comparative efficacy of prophylactic treatment with d-tubocurarine (d-TC) (0.075 mg/kg), atropine sulfate (16 mg/kg), and atropine methylnitrate (16 mg/kg), employed singly or in combination against the diisopropylphosphorofluoridate (DFP)-induced myopathy in rat. DFP (1.5 mg/kg, s.c.) produced signs of cholinergic toxicity with predominantly peripheral involvement manifest as severe muscle fasciculations beginning within 5-7 min and persisting in excess of 4-6 h. Maximal muscle fiber necrosis was observed within 24 h. Rats were protected against the apparent behavioural and morphological changes as well as electrophysiological signs of neuromuscular toxicity by all pretreatment agents. Combined pretreatment with d-TC (0.075 mg/kg, s.c.) and atropine methylnitrate (16 mg/kg, s.c.) was found to be most effective in attenuating DFP-induced muscle fiber necrosis as evidenced by complete absence of lesions and the prevention of DFP-induced hyperactivity in nerve and muscle. Significant protection was afforded by all pretreatment agents when given alone. It is suggested that the pretreatment agents act presynaptically by preventing drug-induced backfiring and muscle fasciculations possibly by reducing the release of acetylcholine (ACh). The protective drugs in the concentrations used had no significant effect on the normal characteristics of conduction and transmission.
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Affiliation(s)
- G T Patterson
- Department of Pharmacology, School of Medicine, Vanderbilt University, Nashville, TN 37232
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Abstract
Since the recognition of the Beckwith-Wiedemann syndrome was first noted in 1963, the number of associated anomalies has vastly increased. The rate of appearance of this abnormality is 1 in 13,5000 births. This article presents a case that includes macroglossia and ankyloglossia along with a bifid uvula and a submucous cleft of the palate. A discussion of treatment follows.
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Affiliation(s)
- G T Patterson
- Department of Surgery, University of Pittsburgh School of Medicine, PA
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Abstract
Male Sprague-Dawley rats injected s.c. with an acute non-lethal dose (200 micrograms/kg) of ethyl N,N-dimethylphosphoramidocyanidate (tabun) showed onset of hypercholinergic activity within 10-15 min. The maximal severity of toxicity signs was evident within 0.5-1 h and persisted for 6 h. Except for mild tremors no overt toxicity signs were evident after 24 h. Within 1 h a dramatic decline of acetylcholinesterase (AChE) activity occurred in all the brain structures (less than 3%) and skeletal muscles (less than 10% in soleus and hemi-diaphragm; and 32% in extensor digitorum longus (EDL)). No significant recovery was seen up to 48-72 h. Within 7 days rats became free of toxicity signs and AChE activity had recovered to about 40% in brain structures (except cortex, 14%) and 65-70% in skeletal muscles. Within 1 h the 16 S molecular form of AChE located at the neuromuscular junction was most severely inhibited in soleus, followed by hemi-diaphragm and least in the EDL, and had fully recovered in all the muscles when examined after day 7. Muscle fiber necrosis developed within 1-3 h in soleus and hemi-diaphragm and after a delay of 24 h in EDL. The highest number of necrotic lesions in all muscles was seen at 72 h with the hemi-diaphragm maximally affected and EDL the least. To determine detoxification of tabun by non-specific binding, the activity of butyrylcholinesterase (BuChE) and carboxylesterase (CarbE) was measured. The inhibition and recovery pattern of BuChE activity was quite similar to that of AChE, except that the rate of recovery was more rapid. Within 1 h the remaining activity of CarbE was 10% in plasma, about 30% in brain structures, and 79% in liver; recovery was complete within 7 days. The inhibition of BuChE and CarbE can serve as a protective mechanism against tabun toxicity by reducing the amount available for AChE inhibition. The prolonged AChE inhibition in muscle and brain may indicate storage of tabun and delayed release from non-enzymic sites. Since tabun is a cyanophosphorus compound, the toxic effects from the released cyanide (CN) could be another reason for the delayed recovery after tabun.
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Affiliation(s)
- R C Gupta
- Department of Pharmacology, School of Medicine, Vanderbilt University, Nashville, TN 37232
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Abstract
Rats injected with a nonlethal acute dose (100 micrograms/kg, sc) of soman (pinacolyl methylphosphonofluoridate) exhibited signs of anticholinesterase toxicity beginning at 5-15 min with increasing severity and lasting for 4-6 hr. Generalized tremors and seizure activity indicated comparatively greater involvement of the central cholinergic system than peripheral neuromuscular effects. During peak toxicity, all the brain regions tested showed more than 95% inhibition of acetylcholinesterase (AChE) activity. The cortex area was maximally affected (99% inhibition). Among skeletal muscles, soleus AChE was most severely affected (94%) and extensor digitorum longus (EDL) the least (72%). Inhibition of EDL AChE occurred at a much slower rate than in brain and other muscles. Significant recovery of AChE activity was seen by 48-72 hr after soman treatment in both brain and skeletal muscles. By Day 7, recovery was virtually complete in skeletal muscles but not in brain, although significant recovery had occurred by this time. Muscle fiber necrosis developed within 6 hr in the soleus and diaphragm, while no necrotic fibers were found in the EDL. The 16 S AChE molecular form showed the fastest recovery of the AChE isozymes in all three muscles. Full recovery was seen after 7 days in soleus and was increased to greater than control activity in diaphragm and EDL. The inhibition pattern of butyrylcholinesterase (BuChE) activity was similar to that described for AChE activity, but the recovery was comparatively faster. Carboxylesterase activity in plasma was decreased to less than 10% of control within 1 hr and recovered to 53% of control within 24 hr. No significant inhibition was seen in hepatic carboxylesterase activity. It can be concluded that soman-induced acute toxicity is directly related to the rate and degree of AChE inhibition. A significant amount of soman binds to non-AChE enzymes with serine sites such as BuChE and carboxylesterases.
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Gupta RC, Patterson GT, Dettbarn WD. Mechanisms of toxicity and tolerance to diisopropylphosphorofluoridate at the neuromuscular junction of the rat. Toxicol Appl Pharmacol 1986; 84:541-50. [PMID: 3726874 DOI: 10.1016/0041-008x(86)90259-0] [Citation(s) in RCA: 53] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Diisopropylphosphorofluoridate (DFP), an irreversible inhibitor of acetylcholinesterase (AChE) activity, when given as an acute dose (1.5 mg/kg, sc) caused fasciculations and induced necrosis in rat skeletal muscle fibers. No adaptation was seen to daily dosing of DFP (1.5 mg/kg, sc) since all rats died after the second or third injection. Daily dosing of DFP in a concentration (0.5 mg/kg, sc) that as a single dose did not cause symptoms, produced onset of fasciculations on the third day associated with a reduced number of muscle fiber lesions. Further administration of DFP (14 days) caused disappearance of fasciculations and loss of sensitivity to the necrotizing actions in all muscles tested (diaphragm, soleus, and extensor digitorum longus). Activity of all molecular forms of AChE was reduced to 20-24% of control when symptoms of cholinergic hyperactivity appeared. Continuous injections of DFP (0.5 mg/kg/day, sc) up to 14 days did not cause greater inhibition of AChE activity. Instead, recovery of enzyme activity, especially of the 4S and 10S forms, was seen. During this period choline acetyltransferase activity (ChAT) was increased in muscle (intramuscular nerves) while the postsynaptic nicotinic acetylcholine receptor (nAChR) density (Bmax) was decreased to 44% without a change in the affinity constant (KD). It is concluded that neuromuscular adaptation to DFP is caused by recovery of AChE activity due to de novo synthesis and reduction in the number of nAChR.
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Abstract
A large (20S) collagen-tailed form of acetylcholinesterase associated with the neuromuscular junction appears in cultures of chick embryo muscle cells when horse serum is withdrawn from the medium. In this report, 10-day-old cultures were incubated 2 days in serum-free medium or in medium containing either horse, bovine, fetal calf, chicken, heat-treated horse or chicken serum, low (less than 100K) or high (less than 100K) molecular weight fractions of horse serum, or fibronectin. Total acetylcholinesterase activity and activity of the 20S form increased in medium without serum, with fetal calf serum and with the low-molecular-weight fraction of horse serum. The largest increase occurred with fibronectin. The results suggest that a factor(s) greater than 100K in adult sera inhibits total acetylcholinesterase production and formation of the 20S form of the enzyme.
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Abstract
Rats treated daily with diisopropylfluorophosphate (DFP) (0.5 mg/kg, sc), an inhibitor of acetylcholinesterase (AChE) activity, exhibited the symptoms of cholinergic hyperactivity between Days 3 and 5 similar to those observed 15 min after a single acute dosage (1.5 mg/kg, sc). A significant (p less than 0.05) decrease in the activities of both AChE and cholinesterase (BuChE) (greater than 80%) occurred in muscles and in brain regions and of aliesterases in liver (greater than 92%) at this time. Further administration of DFP (0.5 mg/kg, for 7-14 days) led to behavioral tolerance, where symptoms of toxicity disappeared such as muscle fasciculations, tremors, and muscle necrosis. The activity of aliesterases in liver and AChE in muscles significantly (p less than 0.01) recovered, while no such recovery was seen in brain AChE. DFP toxicity was potentiated in rats that were pretreated with BuChE inhibitors, such as iso-OMPA (3 mg/kg, sc) or mipafox (0.05 mg/kg, sc), 30 min prior to DFP (0.5 mg/kg, sc). The severity of cholinergic hyperactivity and inhibition of aliesterase in liver, AChE and BuChE activity in brain and muscles was greater when compared to the effects of DFP alone. Both iso-OMPA and mipafox completely abolished the tolerance development to DFP, since no animal survived more than 5 days of combined treatment. The observed adaptation to DFP toxicity appears to be due to recovery of aliesterase, BuChE, and AChE activity as well as decreased nicotinic binding sites at the neuromuscular junction, as previously reported.
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Patterson GT, Dettbarn WD. Changes in skeletal muscle properties following hindlimb suspension. Physiologist 1985; 28:S133-4. [PMID: 3834433] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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Abstract
In a previous series of 22-day evaluations of 31 compounds, only corticosterone-21-acetate (C-21-A) increased righting ability of genetically dystrophic chickens to a greater extent than the standard of comparison, methysergide maleate. In the present study, C-21-A was subjected to longer-term trials of up to 48 days, and additional signs of the myopathy were examined. The highest doses of C-21-A increased righting ability for the duration of the trials, decreased the typically elevated plasma levels of creatine kinase (CK) activity by more than 80%, and improved morphology of the dystrophic pectoralis major muscle at the light microscopic level. The major adverse effect of C-21-A, reduction of body weight, was consistently observed at the relatively high doses needed to increase righting ability. That alone, however, could not account for increased righting ability, and plasma CK activity was decreased even at doses that did not reduce body weight. The results show that C-21-A is the most effective compound yet tested in this system and, perhaps more significantly, provides the first evidence that it is possible to identify compounds that improve muscle morphology in a hereditary myopathy using a short-term, step-wise system.
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Abstract
Chicks affected with hereditary muscular dystrophy were deprived of water for 1 to 4 days at ages to 37 days ex ovo. Water deprivation partially alleviated impaired righting ability and reduced the typically elevated plasma creatine kinase activity by as much as 90%. Muscles from water-deprived chicks showed several qualitative histologic improvements, including decreased sarcoplasmic staining for acetylcholinesterase activity, reduced fiber diameters, and a decreased incidence of abnormally large rounded fibers, but retained the high degree of fiber diameter variability characteristic of dystrophic muscles. Feed deprivation reduced body weight to a similar extent as water deprivation but had lesser effects on creatine kinase activity and did not improve righting ability or muscle histology. Although the mechanism of the improvements is unknown, the magnitude and scope of the effects suggest that water deprivation beneficially alters a major abnormality in dystrophic chickens.
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Bulger JE, Randall WR, Nieberg PS, Patterson GT, McNamee MG, Wilson BW. Regulation of acetylcholinesterase forms in quail and chicken muscle cultures. Dev Neurosci 1982; 5:474-83. [PMID: 7160313 DOI: 10.1159/000112708] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
High molecular forms of acetylcholinesterase (AChE) have been difficult to obtain in primary cultures of muscle from mammals and birds. This research used pectoral muscle cultures from Japanese quail and chick embryos grown in medium containing embryo extract and horse serum to study the growth and extraction conditions necessary for study of high molecular weight 20S AChE forms found in these birds. The results confirmed the presence of a 20S AChE form in quail muscle cultures and showed that its extraction from the cells was considerably improved by using a Mg-cholate extraction buffer rather than the more commonly used NaCl-Triton X buffer. A striking finding was that removal of serum from the medium for 1-2 days caused the preferential increase in a 20S form in the quail and the resolution of one from background activity in chick muscle cultures. Removal of embryo extract had no effect on levels of the AChE forms. The results suggest that serum factors inhibit the formation of the high molecular weight, motor end plate associated form of AChE in aneural cultures of avian muscle, and that effects of factors such as neural extracts and nerves on AChE forms in cultured muscle should be examined using a defined basal media.
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Entrikin RK, Patterson GT, Wilson BW. Baclofen, procainamide, verapamil, and prenylamine in hereditary muscular dystrophy of the chicken. Exp Neurol 1981; 74:86-92. [PMID: 7286127 DOI: 10.1016/0014-4886(81)90150-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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