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Wang Y, Wu Q, Ren B, Muskhelishvili L, Davis K, Wynne R, Rua D, Cao X. Subacute Pulmonary Toxicity of Glutaraldehyde Aerosols in a Human In Vitro Airway Tissue Model. Int J Mol Sci 2022; 23:12118. [PMID: 36292975 PMCID: PMC9603730 DOI: 10.3390/ijms232012118] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2022] [Revised: 10/04/2022] [Accepted: 10/05/2022] [Indexed: 08/24/2023] Open
Abstract
Glutaraldehyde (GA) has been cleared by the Center for Devices and Radiological Health (CDRH) of the Food and Drug Administration (FDA) as a high-level disinfectant for disinfecting heat-sensitive medical equipment in hospitals and healthcare facilities. Inhalation exposure to GA is known to cause respiratory irritation and sensitization in animals and humans. To reproduce some of the known in vivo effects elicited by GA, we used a liquid aerosol exposure system and evaluated the tissue responses in a human in vitro airway epithelial tissue model. The cultures were treated at the air interface with various concentrations of GA aerosols on five consecutive days and changes in tissue function and structure were evaluated at select timepoints during the treatment phase and after a 7-day recovery period. Exposure to GA aerosols caused oxidative stress, inhibition of ciliary beating frequency, aberrant mucin production, and disturbance of cytokine and matrix metalloproteinase secretion, as well as morphological transformation. Some effects, such as those on goblet cells and ciliated cells, persisted following the 7-day recovery period. Of note, the functional and structural disturbances observed in GA-treated cultures resemble those found in ortho-phthaldehyde (OPA)-treated cultures. Furthermore, our in vitro findings on GA toxicity partially and qualitatively mimicked those reported in the animal and human survey studies. Taken together, observations from this study demonstrate that the human air-liquid-interface (ALI) airway tissue model, integrated with an in vitro exposure system that simulates human inhalation exposure, could be used for in vitro-based human hazard identification and the risk characterization of aerosolized chemicals.
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Affiliation(s)
- Yiying Wang
- Division of Genetic and Molecular Toxicology, National Center for Toxicological Research, U.S. Food and Drug Administration, Jefferson, AR 72079, USA
| | - Qiangen Wu
- Division of Biochemical Toxicology, National Center for Toxicological Research, Jefferson, AR 72079, USA
| | - Baiping Ren
- Division of Genetic and Molecular Toxicology, National Center for Toxicological Research, U.S. Food and Drug Administration, Jefferson, AR 72079, USA
| | | | - Kelly Davis
- Toxicologic Pathology Associates, Jefferson, AR 72079, USA
| | - Rebecca Wynne
- Division of Genetic and Molecular Toxicology, National Center for Toxicological Research, U.S. Food and Drug Administration, Jefferson, AR 72079, USA
| | - Diego Rua
- Division of Biology, Chemistry and Materials Science, Office of Science and Engineering Laboratories, Center for Devices and Radiological Health, Silver Spring, MD 20993, USA
| | - Xuefei Cao
- Division of Genetic and Molecular Toxicology, National Center for Toxicological Research, U.S. Food and Drug Administration, Jefferson, AR 72079, USA
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2
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Matthews S, O"neil A, Sanders J, Buttery A, Maraosco S, Fredericks S, Martorella G, Keenan N, Ganes A, Wynne R. Sex-specific differences in mortality after first time, isolated coronary artery bypass graft surgery: a systematic review and meta-analysis of randomized controlled trials. Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehab849.136] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Funding Acknowledgements
Type of funding sources: None.
BACKGROUND
Evidence quantifying sex-specific differences in cardiac surgical outcomes is scant.
PURPOSE
The purpose of this review was to determine whether contemporary evidence indicates Coronary Artery Bypass Graft Surgery (CABGS) is differentially efficacious than alternative procedures by sex on mortality outcomes.
METHODS
EMBASE, CINAHL, Medline and Cochrane Library databases were searched (January 2010-April 2020). English language, randomized controlled trials, comparing isolated CABGS to an alternative revascularization strategy in adults, with analyses comparing sex-specific differences in mortality were included. Analyses of incidence data was performed using Mantel-Haenszel fixed-effects modelling, Cochrane RoB2 tool and CONSORT checklist. PROSPERO Registration ID: CRD42020181673.
RESULTS
The search yielded 4459 citations, with 29 articles for full-text review revealing 9 eligible studies with variability in time to follow-up. In contrast to men, mortality risk for women was lower in pooled analyses (RR 0.95, 95% CI 0.85-1.05, p = 0.33) but higher in sensitivity analyses excluding ‘high-risk’ patients (RR 1.18, 95% CI 0.99-1.40, p = 0.07). At 30-days and 10 years, women had an 18% (RR 0.82, 95% CI 0.66-1.02, p = 0.08) and 19% (RR 0.81, 95% CI 0.69-0.95, p = 0.01) mortality risk reduction. At 1-2 years women had a 7% (RR 1.07, 95% CI 0.69-1.64, p = 0.77), and at 2-5 years a 25% increase in risk of mortality compared to men (RR 1.25, 95% CI 1.03-1.53, p = 0.03). Women were increasingly under represented (23.2%) over time, comprising 29% (30-days) to 16% (10 years) of the pooled population.
CONCLUSION
Trials with sex-specific stratification are required to ensure appropriate treatment options for coronary revascularization.
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Affiliation(s)
- S Matthews
- National Heart Foundation of Australia, Melbounre, Australia
| | - A O"neil
- Deakin University, Melbourne, Australia
| | - J Sanders
- St Bartholomew"s Hospital, London, United Kingdom of Great Britain & Northern Ireland
| | - A Buttery
- National Heart Foundation of Australia, Melbounre, Australia
| | - S Maraosco
- The Alfred Hospital, Melbourne, Australia
| | | | - G Martorella
- Florida State University, Tallahasse, United States of America
| | - N Keenan
- St James Hospital, Dublin, Ireland
| | - A Ganes
- Barwon Health, Geelong, Australia
| | - R Wynne
- Western Sydney Local Health District, Sydney, Australia
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Ferguson C, Shaikh F, Hickman L, Inglis S, Bajorek B, Downie A, Griffin K, Wynne R. Pilot-Feasibility Study of a Digital Education Program for Patients Living With Atrial Fibrillation on Knowledge and Quality Of Life. Heart Lung Circ 2022. [DOI: 10.1016/j.hlc.2022.06.433] [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]
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Shaikh F, Wynne R, Castelino R, Inglis S, Davidson P, Ferguson C. Practices, Beliefs, and Attitudes of Clinicians in the Use of Direct Oral Anticoagulants in Obese Adults With Atrial Fibrillation. Heart Lung Circ 2022. [DOI: 10.1016/j.hlc.2022.06.434] [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: 10/16/2022]
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Shaikh F, Wynne R, Castelino RL, Inglis SC, Ferguson C. Effectiveness of direct oral anticoagulants in obese adults with atrial fibrillation: an overview examining the evidence from international systematic reviews and meta-analyses. Eur Heart J 2021. [DOI: 10.1093/eurheartj/ehab724.2987] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background
Obesity may influence the pharmacology of direct oral anticoagulants (DOAC) that are recommended by all international guidelines for stroke prevention in adults with atrial fibrillation (AF).
Purpose
To evaluate the safety and efficacy of DOACs in obese adults with AF.
Methods
Medline, CINAHL, Scopus, Web of Science, Cochrane Database, Johanna Briggs Institute, Embase, Psych Info and ProQuest were searched till April 2020. Only systematic reviews with meta-analyses, that were published after 2005 and were in the English language were included. Articles were screened by title and abstract, followed by full text assessment using the Covidence systematic review software. Data was extracted using a standardised extraction tool. AMSTAR-2® and ROBIS® tools were used for quality and risk of bias assessment. The entire process was undertaken by two investigators at each stage of the study selection, appraisal, and data extraction. Disagreements were resolved through consensus discussion with a third arbitrary investigator. Statistical analyses were performed using the DerSimonian and Laird method for random effects. Meta-analysis was performed using only randomised controlled trials from eligible systematic reviews at both 12 months and across the entire trial. Primary outcomes assessed was stroke (ischemic or haemorrhagic) or systemic or pulmonary embolism. Secondary outcomes assessed included all-cause mortality, transient ischemic attack, myocardial infarction, major bleed, all cause-hospitalisation, and cardiovascular mortality.
Results
Of the 8162 articles screened, a total of five systematic reviews were included in this overview. There was disagreement within the published reviews on the effect of DOAC in obesity. Four of the five reviews were of either “low” or “critically low” quality, with inconsistencies in data extraction and appropriateness of the included studies and statistical methods used in analysis. Data from only the RE-LY, AVERROES and ENGAGE AF-TIMI 48 trials, were available for the meta-analysis, which did not find any significant difference between all BMI groups for all outcomes, at both time points. However, analysis of the different weight groups versus normal weight, highlighted non-significant differences between the different DOACs.
Conclusion
There was no difference between the BMI classes in any of the outcomes assessed. However, the non-significant trends that were seen, suggests individual superiority of DOACs may exist within the obese adult populations. There is a need for prospective trials to evaluate which DOACs are safe and efficacious in the obese class III adults and at which dose.
Funding Acknowledgement
Type of funding sources: Other. Main funding source(s): Australian Government Research Training Program (RTP) Heart Foundation of AustraliaNational Health and Medical Research Council (NHMRC)
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Affiliation(s)
- F Shaikh
- Western Sydney University and Western Sydney Local Health District, Western Sydney Nursing and Midwifery Research Centre, Sydney, Australia
| | - R Wynne
- Western Sydney University and Western Sydney Local Health District, Western Sydney Nursing and Midwifery Research Centre, Sydney, Australia
| | - R L Castelino
- Western Sydney Local Health District, Pharmacy Department, Sydney, Australia
| | - S C Inglis
- University of Technology, Sydney, Improving Palliative, Aged and Chronic Care through Clinical Research and Translation (IMPACCT), Sydney, Australia
| | - C Ferguson
- Western Sydney University and Western Sydney Local Health District, Western Sydney Nursing and Midwifery Research Centre, Sydney, Australia
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Wang Y, Mittelstaedt RA, Wynne R, Chen Y, Cao X, Muskhelishvili L, Davis K, Robison TW, Sun W, Schmidt EK, Smith TH, Norgaard ZK, Valentine CC, Yaplee J, Williams LN, Salk JJ, Heflich RH. Genetic toxicity testing using human in vitro organotypic airway cultures: Assessing DNA damage with the CometChip and mutagenesis by Duplex Sequencing. Environ Mol Mutagen 2021; 62:306-318. [PMID: 34050964 PMCID: PMC8251634 DOI: 10.1002/em.22444] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2021] [Revised: 05/05/2021] [Accepted: 05/15/2021] [Indexed: 05/10/2023]
Abstract
The organotypic human air-liquid-interface (ALI) airway tissue model has been used as an in vitro cell culture system for evaluating the toxicity of inhaled substances. ALI airway cultures are highly differentiated, which has made it challenging to evaluate genetic toxicology endpoints. In the current study, we assayed DNA damage with the high-throughput CometChip assay and quantified mutagenesis with Duplex Sequencing, an error-corrected next-generation sequencing method capable of detecting a single mutation per 107 base pairs. Fully differentiated human ALI airway cultures were treated from the basolateral side with 6.25 to 100 μg/mL ethyl methanesulfonate (EMS) over a period of 28 days. CometChip assays were conducted after 3 and 28 days of treatment, and Duplex Sequencing after 28 days of treatment. Treating the airway cultures with EMS resulted in time- and concentration-dependent increases in DNA damage and a concentration-dependent increase in mutant frequency. The mutations observed in the EMS-treated cultures were predominantly C → T transitions and exhibited a unique trinucleotide signature relative to the negative control. Measurement of physiological endpoints indicated that the EMS treatments had no effect on anti-p63-positive basal cell frequency, but produced concentration-responsive increases in cytotoxicity and perturbations in cell morphology, along with concentration-responsive decreases in culture viability, goblet cell and anti-Ki67-positive proliferating cell frequency, cilia beating frequency, and mucin secretion. The results indicate that a unified 28-day study can be used to measure several important safety endpoints in physiologically relevant human in vitro ALI airway cultures, including DNA damage, mutagenicity, and tissue-specific general toxicity.
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Affiliation(s)
- Yiying Wang
- U.S. Food and Drug Administration, National Center for Toxicological ResearchJeffersonArkansasUSA
| | - Roberta A. Mittelstaedt
- U.S. Food and Drug Administration, National Center for Toxicological ResearchJeffersonArkansasUSA
| | - Rebecca Wynne
- U.S. Food and Drug Administration, National Center for Toxicological ResearchJeffersonArkansasUSA
| | - Ying Chen
- U.S. Food and Drug Administration, National Center for Toxicological ResearchJeffersonArkansasUSA
| | - Xuefei Cao
- U.S. Food and Drug Administration, National Center for Toxicological ResearchJeffersonArkansasUSA
| | | | - Kelly Davis
- Toxicologic Pathology AssociatesJeffersonArkansasUSA
| | - Timothy W. Robison
- U.S. Food and Drug Administration, Center for Drug Evaluation and ResearchSilver SpringMarylandUSA
| | - Wei Sun
- U.S. Food and Drug Administration, Center for Drug Evaluation and ResearchSilver SpringMarylandUSA
| | | | | | | | | | | | | | | | - Robert H. Heflich
- U.S. Food and Drug Administration, National Center for Toxicological ResearchJeffersonArkansasUSA
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Wang Y, Wu Q, Muskhelishvili L, Davis K, Wynne R, Tripathi P, Bryant MS, Rua D, Cao X. Toxicity of Ortho-phthalaldehyde Aerosols in a Human In Vitro Airway Tissue Model. Chem Res Toxicol 2021; 34:754-766. [PMID: 33556243 DOI: 10.1021/acs.chemrestox.0c00379] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Ortho-phthalaldehyde (OPA) is a chemical disinfectant used for the high-level sterilization of heat-sensitive medical instruments. Although OPA is considered a safer alternative to glutaraldehyde, no exposure limits have been established for respiratory exposures to ensure the safety of OPA sterilization and the safe use of OPA-treated medical instruments. In order to address data gaps in the toxicological profile of OPA, we treated human in vitro air-liquid-interface (ALI) airway cultures at the air interface with various concentrations of OPA aerosols for 10 consecutive days. Temporal tissue responses were evaluated at multiple time points during the treatment phase as well as 10 days following the last exposure. The disturbance of glutathione (GSH) homeostasis occurred as early as 20 min following the first exposure, while oxidative stress persisted throughout the treatment phase, as indicated by the sustained induction of heme oxygenase-1 (HMOX-1) expression. Repeated exposures to OPA aerosols resulted in both functional and structural changes, including the inhibition of ciliary beating frequency, aberrant mucin production, decreases in airway secretory cells, and tissue morphological changes. While OPA-induced oxidative stress recovered to control levels after a 10 day recovery period, functional and structural alterations caused by the high concentration of OPA aerosols failed to fully recover over the observation period. These findings indicate that aerosolized OPA induces both transient and relatively persistent functional and structural abnormalities in ALI cultures under the conditions of the current study.
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Affiliation(s)
| | | | - Levan Muskhelishvili
- Toxicologic Pathology Associates, Jefferson, Arkansas 72079, United States of America
| | - Kelly Davis
- Toxicologic Pathology Associates, Jefferson, Arkansas 72079, United States of America
| | | | | | | | - Diego Rua
- Division of Biology, Chemistry, and Materials Science, Office of Science and Engineering Laboratories, Center for Devices and Radiological Health, U.S. Food and Drug Administration, Silver Spring, Maryland 20993, United States of America
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8
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Wynne R, Ferguson C, Williams-Spence J, Tran L, Reid C. Australian Risk Factors for 30-day Readmission After Isolated Coronary Artery Bypass Grafts. Heart Lung Circ 2021. [DOI: 10.1016/j.hlc.2021.06.354] [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: 11/28/2022]
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9
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Geia L, Baird K, Bail K, Barclay L, Bennett J, Best O, Birks M, Blackley L, Blackman R, Bonner A, Bryant AO R, Buzzacott C, Campbell S, Catling C, Chamberlain C, Cox L, Cross W, Cruickshank M, Cummins A, Dahlen H, Daly J, Darbyshire P, Davidson P, Denney-Wilson E, De Souza R, Doyle K, Drummond A, Duff J, Duffield C, Dunning T, East L, Elliott D, Elmir R, Fergie OAM D, Ferguson C, Fernandez R, Flower AM D, Foureur M, Fowler C, Fry M, Gorman E, Grant J, Gray J, Halcomb E, Hart B, Hartz D, Hazelton M, Heaton L, Hickman L, Homer AO CSE, Hungerford C, Hutton A, Jackson AO D, Johnson A, Kelly MA, Kitson A, Knight S, Levett-Jones T, Lindsay D, Lovett R, Luck L, Molloy L, Manias E, Mannix J, Marriott AMR, Martin M, Massey D, McCloughen A, McGough S, McGrath L, Mills J, Mitchell BG, Mohamed J, Montayre J, Moroney T, Moyle W, Moxham L, Northam OAM H, Nowlan S, O'Brien AP, Ogunsiji O, Paterson C, Pennington K, Peters K, Phillips J, Power T, Procter N, Ramjan L, Ramsay N, Rasmussen B, Rihari-Thomas J, Rind B, Robinson M, Roche M, Sainsbury K, Salamonson Y, Sherwood J, Shields L, Sim J, Skinner I, Smallwood G, Smallwood R, Stewart L, Taylor S, Usher AM K, Virdun C, Wannell J, Ward R, West C, West R, Wilkes L, Williams R, Wilson R, Wynaden D, Wynne R. A unified call to action from Australian nursing and midwifery leaders: ensuring that Black lives matter. Contemp Nurse 2020; 56:297-308. [DOI: 10.1080/10376178.2020.1809107] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- L. Geia
- James Cook University, Townsville, QLD, Australia
| | - K. Baird
- University of Technology Sydney, Sydney, NSW, Australia
| | - K. Bail
- University of Canberra, Canberra, ACT, Australia
| | - L. Barclay
- University of Sydney, Sydney, NSW, Australia
| | - J. Bennett
- University of Newcastle, Callaghan, NSW, Australia
| | - O. Best
- University of Southern Queensland, Darling Heights, QLD, Australia
| | - M. Birks
- James Cook University, Townsville, QLD, Australia
| | - L. Blackley
- Queensland Health, Joyce Palmer Health Service, Palm Island, QLD, Australia
| | - R. Blackman
- Gidgee Healing Mt Isa, Mount Isa, QLD, Australia
| | - A. Bonner
- Griffith University, Brisbane, QLD, Australia
| | - R. Bryant AO
- Rosemary Bryant Foundation, South Australia, Australia
| | - C. Buzzacott
- Rhodanthe Lipsett Indigenous Midwifery Charitable Fund, Caringbah, NSW, Australia
| | - S. Campbell
- Charles Darwin University, Darwin, NT, Australia
| | - C. Catling
- University of Technology Sydney, Sydney, NSW, Australia
| | | | - L. Cox
- Queensland University of Technology, Brisbane, QLD, Australia
| | - W. Cross
- Federation University, Ballarat, VIC, Australia
| | - M. Cruickshank
- University of Technology Sydney, Sydney, NSW, Australia
- Sydney Children’s Hospital Network, Sydney, NSW, Australia
| | - A. Cummins
- University of Technology Sydney, Sydney, NSW, Australia
| | - H. Dahlen
- Western Sydney University, Sydney, NSW, Australia
| | - J. Daly
- University of Sydney, Sydney, NSW, Australia
| | - P. Darbyshire
- Philip Darbyshire Consulting, Highbury, South Australia, Australia
| | - P. Davidson
- University of Technology Sydney, Sydney, NSW, Australia
- Western Sydney University, Sydney, NSW, Australia
- John Hopkins University, Baltimore, USA
| | | | | | - K. Doyle
- Western Sydney University, Sydney, NSW, Australia
| | - A. Drummond
- Queensland University of Technology, Brisbane, QLD, Australia
| | - J. Duff
- Queensland University of Technology, Brisbane, QLD, Australia
| | - C. Duffield
- University of Technology Sydney, Sydney, NSW, Australia
- Edith Cowan University, Perth, Western Australia, Australia
| | - T. Dunning
- Deakin University, Melbourne, VIC, Australia
| | - L. East
- University of New England, Armidale, NSW, Australia
| | - D. Elliott
- University of Technology Sydney, Sydney, NSW, Australia
| | - R. Elmir
- Western Sydney University, Sydney, NSW, Australia
| | - D. Fergie OAM
- Australian Catholic University, Fitzroy, VIC, Australia
| | - C. Ferguson
- Western Sydney University, Sydney, NSW, Australia
| | - R. Fernandez
- University of Wollongong, Keiraville, NSW, Australia
| | | | - M. Foureur
- University of Newcastle, Callaghan, NSW, Australia
| | - C. Fowler
- University of Technology Sydney, Sydney, NSW, Australia
| | - M. Fry
- University of Technology Sydney, Sydney, NSW, Australia
| | - E. Gorman
- New South Wales Health, Sydney, NSW, Australia
| | - J. Grant
- Charles Sturt University, Dubbo, NSW, Australia
| | - J. Gray
- University of Technology Sydney, Sydney, NSW, Australia
| | - E. Halcomb
- University of Wollongong, Keiraville, NSW, Australia
| | - B. Hart
- University of Notre Dame, Darlinghurst, NSW, Australia
| | - D. Hartz
- Charles Darwin University, Darwin, NT, Australia
| | - M. Hazelton
- University of Newcastle, Callaghan, NSW, Australia
| | - L. Heaton
- Western Sydney University, Sydney, NSW, Australia
| | - L. Hickman
- University of Technology Sydney, Sydney, NSW, Australia
- Contemporary Nurse Journal
| | | | | | - A. Hutton
- University of Newcastle, Callaghan, NSW, Australia
| | - D. Jackson AO
- University of Technology Sydney, Sydney, NSW, Australia
| | - A. Johnson
- University of Newcastle, Callaghan, NSW, Australia
| | - M. A. Kelly
- Sydney Children’s Hospital Network, Sydney, NSW, Australia
| | - A. Kitson
- Western Sydney University, Sydney, NSW, Australia
| | - S. Knight
- James Cook University, Townsville, QLD, Australia
| | | | - D. Lindsay
- James Cook University, Townsville, QLD, Australia
| | - R. Lovett
- Australian National University, Canberra, Australian Capital Territory, Australia
| | - L. Luck
- Western Sydney University, Sydney, NSW, Australia
| | - L. Molloy
- University of Wollongong, Keiraville, NSW, Australia
| | - E. Manias
- Deakin University, Melbourne, VIC, Australia
| | - J. Mannix
- Western Sydney University, Sydney, NSW, Australia
| | | | - M. Martin
- Queensland Aboriginal and Islander Health Council, Brisbane, QLD, Australia
| | - D. Massey
- Southern Cross University, Gold Coast Campus, QLD, Australia
| | | | - S. McGough
- Curtin University, Perth, Western Australia, Australia
| | - L. McGrath
- Aboriginal Medical Service Redfern, Sydney, NSW, Australia
| | - J. Mills
- La Trobe University, Melbourne, VIC, Australia
| | | | - J. Mohamed
- Lowitja Institute, Melbourne, VIC, Australia
| | - J. Montayre
- Western Sydney University, Sydney, NSW, Australia
| | - T. Moroney
- University of Wollongong, Keiraville, NSW, Australia
| | - W. Moyle
- Griffith University, Brisbane, QLD, Australia
| | - L. Moxham
- University of Wollongong, Keiraville, NSW, Australia
| | | | - S. Nowlan
- Queensland Health, Joyce Palmer Health Service, Palm Island, QLD, Australia
| | | | - O. Ogunsiji
- Western Sydney University, Sydney, NSW, Australia
| | - C. Paterson
- University of Canberra, Canberra, ACT, Australia
| | - K. Pennington
- Flinders University, Adelaide, South Australia, Australia
| | - K. Peters
- Western Sydney University, Sydney, NSW, Australia
| | - J. Phillips
- University of Technology Sydney, Sydney, NSW, Australia
| | - T. Power
- University of Technology Sydney, Sydney, NSW, Australia
| | - N. Procter
- University of South Australia, Adelaide, South Australia, Australia
| | - L. Ramjan
- Western Sydney University, Sydney, NSW, Australia
| | - N. Ramsay
- Queensland Health, Joyce Palmer Health Service, Palm Island, QLD, Australia
| | | | | | - B. Rind
- Aboriginal Health Unit Mt Druitt Hospital, Sydney, NSW, Australia
| | - M. Robinson
- Murdoch University, Perth, Western Australia, Australia
| | - M. Roche
- University of Technology Sydney, Sydney, NSW, Australia
| | - K. Sainsbury
- University of Canberra, Canberra, ACT, Australia
| | | | - J. Sherwood
- Charles Sturt University, Dubbo, NSW, Australia
| | - L. Shields
- University of Queensland, Brisbane, QLD, Australia
| | - J. Sim
- University of Wollongong, Keiraville, NSW, Australia
| | - I. Skinner
- James Cook University, Townsville, QLD, Australia
| | - G. Smallwood
- James Cook University, Townsville, QLD, Australia
| | - R. Smallwood
- University of Newcastle, Callaghan, NSW, Australia
- University of New England, Armidale, NSW, Australia
| | - L. Stewart
- James Cook University, Townsville, QLD, Australia
| | - S. Taylor
- Top End Health, Northern Territory, Darwin, NT, Australia
| | - K. Usher AM
- University of Technology Sydney, Sydney, NSW, Australia
- University of New England, Armidale, NSW, Australia
| | - C. Virdun
- University of Technology Sydney, Sydney, NSW, Australia
| | - J. Wannell
- Melbourne Poche Centre for Indigenous Health, Melbourne, VIC, Australia
| | - R. Ward
- University of Southern Queensland, Darling Heights, QLD, Australia
| | - C. West
- James Cook University, Townsville, QLD, Australia
| | - R. West
- Griffith University, Brisbane, QLD, Australia
| | - L. Wilkes
- Western Sydney University, Sydney, NSW, Australia
| | - R. Williams
- Charles Darwin University, Darwin, NT, Australia
| | - R. Wilson
- University of Newcastle, Callaghan, NSW, Australia
- University of New England, Armidale, NSW, Australia
| | - D. Wynaden
- Curtin University, Perth, Western Australia, Australia
| | - R. Wynne
- Western Sydney University, Sydney, NSW, Australia
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Wynne R, McTier L, Kerr D, Rowe C, Abbs M, Driscoll A. 633 A Multi-Site Australian Study of Adult Cardiac Surgical Patients’ Health Literacy. Heart Lung Circ 2020. [DOI: 10.1016/j.hlc.2020.09.640] [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]
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Wynne R, McTier L, Rowe C, Kerr D, Driscoll A. 639 Patient Control Preferences Prior to Discharge After Cardiac Surgery. Heart Lung Circ 2020. [DOI: 10.1016/j.hlc.2020.09.646] [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]
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12
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Fricke T, Buratto E, Wynne R, Larobina M, Grigg L, Skillington P. Long-Term Pulmonary Valve Function After the Ross Procedure. Heart Lung Circ 2019. [DOI: 10.1016/j.hlc.2019.02.063] [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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13
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Harville T, Rhodes-Clark B, Bennuri SC, Delhey L, Slattery J, Tippett M, Wynne R, Rose S, Kahler S, Frye RE. Inheritance of HLA-Cw7 Associated With Autism Spectrum Disorder (ASD). Front Psychiatry 2019; 10:612. [PMID: 31572230 PMCID: PMC6749146 DOI: 10.3389/fpsyt.2019.00612] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/18/2018] [Accepted: 07/31/2019] [Indexed: 12/22/2022] Open
Abstract
Autism spectrum disorder (ASD) is a behaviorally defined disorder that is now thought to affect approximately 1 in 69 children in the United States. In most cases, the etiology is unknown, but several studies point to the interaction of genetic predisposition with environmental factors. The immune system is thought to have a causative role in ASD, and specific studies have implicated T lymphocytes, monocytes, natural killer (NK) cells, and certain cytokines. The human leukocyte antigen (HLA) system is involved in the underlying process for shaping an individual's immune system, and specific HLA alleles are associated with specific diseases as risk factors. In this study, we determine whether a specific HLA allele was associated with ASD in a large cohort of patients with ASD. Identifying such an association could help in the identification of immune system components which may have a causative role in specific cohorts of patients with ASD who share similar specific clinical features. Specimens from 143 patients with ASD were analyzed with respect to race and ethnicity. Overall, HLA-Cw7 was present in a much greater frequency than expected in individuals with ASD as compared to the general population. Further, the cohort of patients who express HLA-Cw7 shares specific immune system/inflammatory clinical features including being more likely to have allergies, food intolerances, and chronic sinusitis as compared to those with ASD who did not express HLA-Cw7. HLA-Cw7 has a role in stimulating NK cells. Thus, this finding may indicate that chronic over-activation of NK cells may have a role in the manifestation of ASD in a cohort of patients with increased immune system/inflammatory features.
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Affiliation(s)
- Terry Harville
- Department of Pathology, University of Arkansas for Medical Sciences, Little Rock, AR, United States.,Department of Internal Medicine, University of Arkansas for Medical Sciences, Little Rock, AR, United States
| | - Bobbie Rhodes-Clark
- Department of Pathology, University of Arkansas for Medical Sciences, Little Rock, AR, United States
| | - Sirish C Bennuri
- Department of Pediatrics, College of Medicine, University of Arkansas for Medical Sciences, Little Rock, AR, United States.,Arkansas Children's Research Institute, Little Rock, AR, United States
| | - Leanna Delhey
- School of Public Health, University of Arkansas for Medical Sciences, Little Rock, AR, United States.,Arkansas Children's Research Institute, Little Rock, AR, United States
| | - John Slattery
- BioRosa Technologies Inc, San Francisco, CA, United States
| | - Marie Tippett
- Department of Pediatrics, College of Medicine, University of Arkansas for Medical Sciences, Little Rock, AR, United States.,Arkansas Children's Research Institute, Little Rock, AR, United States
| | - Rebecca Wynne
- National Center for Toxicological Research, Jefferson, AR, United States
| | - Shannon Rose
- Department of Pediatrics, College of Medicine, University of Arkansas for Medical Sciences, Little Rock, AR, United States.,Arkansas Children's Research Institute, Little Rock, AR, United States
| | - Stephen Kahler
- Department of Pediatrics, College of Medicine, University of Arkansas for Medical Sciences, Little Rock, AR, United States.,Arkansas Children's Research Institute, Little Rock, AR, United States
| | - Richard E Frye
- Barrow Neurological Institute at Phoenix Children's Hospital, Phoenix, AZ, United States.,Department of Child Health, University of Arizona College of Medicine, Phoenix, AZ, United States
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14
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Litton E, Bass F, Delaney A, Hillis G, Marasco S, McGuinness S, Myles PS, Reid CM, Smith JA, Bagshaw SM, Keri-Anne Cowdrey HB, Frengley R, Ferrier J, Gilder E, Henderson S, Larobina M, Merthens J, Morgan M, Navarra L, Rudas M, Turner L, Reid K, Wise M, Young N, Young P, McGiffin D, Duncan J, Kaczmarek M, Seevanayagam S, Shaw M, Shardey G, Skillington P, Chorley T, Baker L, Zhang B, Bright C, Baker R, Canning N, Gilfillan, Kruger R, Fayers T, Kyte M, Doran C, Smith J, Baxter H, Seah P, Scaybrook S, James A, Goodwin K, Dignan R, Hewitt N, Gerrard K, Curtis L, Smith J, Baxter H, Tiruvoipati R, Broukal N, Wolfenden H, Muir, Worthington M, Wong C, Tatoulis J, Wynne R, Marshman D, Sze D, Wilson M, Turner L, Passage J, Kolybaba M, Fermanis G, Newbon P, Passage J, Kolybaba M, Newcomb A, Mack J, Duve K, Jansz P, Hunter T, Bissaker P, Dennis N, Burke N, Yadav S, Cooper K, Chard R, Halaka M, Tran L, Huq M, Billah B, Reid CM. Six-Month Outcomes After High-Risk Coronary Artery Bypass Graft Surgery and Preoperative Intra-aortic Balloon Counterpulsation Use: An Inception Cohort Study. J Cardiothorac Vasc Anesth 2018; 32:2067-2073. [DOI: 10.1053/j.jvca.2018.01.005] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/09/2017] [Indexed: 11/11/2022]
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15
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Delhey L, Kilinc EN, Yin L, Slattery J, Tippett M, Wynne R, Rose S, Kahler S, Damle S, Legido A, Goldenthal MJ, Frye RE. Bioenergetic variation is related to autism symptomatology. Metab Brain Dis 2017; 32:2021-2031. [PMID: 28852932 PMCID: PMC5681971 DOI: 10.1007/s11011-017-0087-0] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [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: 06/07/2017] [Accepted: 08/01/2017] [Indexed: 02/07/2023]
Abstract
Autism spectrum disorder (ASD) has been associated with mitochondrial dysfunction but few studies have examined the relationship between mitochondrial function and ASD symptoms. We measured Complex I and IV and citrate synthase activities in 76 children with ASD who were not receiving vitamin supplementation or medication. We also measured language using the Preschool Language Scales or Clinical Evaluation of Language Fundamentals, adaptive behavior using the Vineland Adaptive Behavioral Scale, social function using the Social Responsiveness Scale and behavior using Aberrant Behavior Checklist, Childhood Behavior Checklist and the Ohio Autism Clinical Impression Scale. Children with ASD demonstrated significantly greater variation in mitochondrial activity compared to controls with more than expected ASD children having enzyme activity outside of the normal range for Citrate Synthase (24%), Complex I (39%) and Complex IV (11%). Poorer adaptive skills were associated with Complex IV activity lower or higher than average and lower Complex I activity. Poorer social function and behavior was associated with relatively higher Citrate Synthase activity. Similar to previous studies we find both mitochondrial underactivity and overactivity in ASD. This study confirms an expanded variation in mitochondrial activity in ASD and demonstrates, for the first time, that such variations are related to ASD symptoms.
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Affiliation(s)
- Leanna Delhey
- Autism Research Program, Arkansas Children's Research Institute, Slot 512-41B, 13 Children's Way, Little Rock, AR, 72202, USA
- Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock, AR, 72202, USA
| | - Ekim Nur Kilinc
- Autism Research Program, Arkansas Children's Research Institute, Slot 512-41B, 13 Children's Way, Little Rock, AR, 72202, USA
- Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock, AR, 72202, USA
| | - Li Yin
- West China Hospital of Sichuan University, Nanchong, Sichuan, China
| | - John Slattery
- Autism Research Program, Arkansas Children's Research Institute, Slot 512-41B, 13 Children's Way, Little Rock, AR, 72202, USA
- Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock, AR, 72202, USA
| | - Marie Tippett
- Autism Research Program, Arkansas Children's Research Institute, Slot 512-41B, 13 Children's Way, Little Rock, AR, 72202, USA
- Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock, AR, 72202, USA
| | - Rebecca Wynne
- Autism Research Program, Arkansas Children's Research Institute, Slot 512-41B, 13 Children's Way, Little Rock, AR, 72202, USA
- Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock, AR, 72202, USA
| | - Shannon Rose
- Autism Research Program, Arkansas Children's Research Institute, Slot 512-41B, 13 Children's Way, Little Rock, AR, 72202, USA
- Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock, AR, 72202, USA
| | - Stephen Kahler
- Autism Research Program, Arkansas Children's Research Institute, Slot 512-41B, 13 Children's Way, Little Rock, AR, 72202, USA
- Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock, AR, 72202, USA
| | - Shirish Damle
- Department of Pediatrics, Drexel University College of Medicine Neurology Section, St. Christopher's Hospital for Children, Philadelphia, PA, 19134, USA
| | - Agustin Legido
- Department of Pediatrics, Drexel University College of Medicine Neurology Section, St. Christopher's Hospital for Children, Philadelphia, PA, 19134, USA
| | - Michael J Goldenthal
- Department of Pediatrics, Drexel University College of Medicine Neurology Section, St. Christopher's Hospital for Children, Philadelphia, PA, 19134, USA
| | - Richard E Frye
- Autism Research Program, Arkansas Children's Research Institute, Slot 512-41B, 13 Children's Way, Little Rock, AR, 72202, USA.
- Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock, AR, 72202, USA.
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16
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Frye RE, Rose S, Wynne R, Bennuri SC, Blossom S, Gilbert KM, Heilbrun L, Palmer RF. Oxidative Stress Challenge Uncovers Trichloroacetaldehyde Hydrate-Induced Mitoplasticity in Autistic and Control Lymphoblastoid Cell Lines. Sci Rep 2017; 7:4478. [PMID: 28667285 PMCID: PMC5493637 DOI: 10.1038/s41598-017-04821-3] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2017] [Accepted: 05/19/2017] [Indexed: 12/11/2022] Open
Abstract
Mitoplasticity occurs when mitochondria adapt to tolerate stressors. Previously we hypothesized that a subset of lymphoblastoid cell lines (LCLs) from children with autistic disorder (AD) show mitoplasticity (AD-A), presumably due to previous environmental exposures; another subset of AD LCLs demonstrated normal mitochondrial activity (AD-N). To better understand mitoplasticity in the AD-A LCLs we examined changes in mitochondrial function using the Seahorse XF96 analyzer in AD and Control LCLs after exposure to trichloroacetaldehyde hydrate (TCAH), an in vivo metabolite of the environmental toxicant and common environmental pollutant trichloroethylene. To better understand the role of reactive oxygen species (ROS) in mitoplasticity, TCAH exposure was followed by acute exposure to 2,3-dimethoxy-1,4-napthoquinone (DMNQ), an agent that increases ROS. TCAH exposure by itself resulted in a decline in mitochondrial respiration in all LCL groups. This effect was mitigated when TCAH was followed by acute DMNQ exposure but this varied across LCL groups. DMNQ did not affect AD-N LCLs, while it neutralized the detrimental effect of TCAH in Control LCLs and resulted in a increase in mitochondrial respiration in AD-A LCLs. These data suggest that acute increases in ROS can activate mitochondrial protective pathways and that AD-A LCLs are better able to activate these protective pathways.
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Affiliation(s)
- Richard Eugene Frye
- Arkansas Children's Research Institute, Little Rock, AR, USA. .,Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock, AR, USA.
| | - Shannon Rose
- Arkansas Children's Research Institute, Little Rock, AR, USA.,Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock, AR, USA
| | - Rebecca Wynne
- Arkansas Children's Research Institute, Little Rock, AR, USA.,Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock, AR, USA
| | - Sirish C Bennuri
- Arkansas Children's Research Institute, Little Rock, AR, USA.,Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock, AR, USA
| | - Sarah Blossom
- Arkansas Children's Research Institute, Little Rock, AR, USA.,Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock, AR, USA
| | - Kathleen M Gilbert
- Arkansas Children's Research Institute, Little Rock, AR, USA.,Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock, AR, USA
| | - Lynne Heilbrun
- Department of Family and Community Medicine, University of Texas Health Science Center, San Antonio, TX, USA
| | - Raymond F Palmer
- Department of Family and Community Medicine, University of Texas Health Science Center, San Antonio, TX, USA
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17
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Rose S, Bennuri SC, Wynne R, Melnyk S, James SJ, Frye RE. Mitochondrial and redox abnormalities in autism lymphoblastoid cells: a sibling control study. FASEB J 2017; 31:904-909. [PMID: 27864377 PMCID: PMC5354548 DOI: 10.1096/fj.201601004r] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2016] [Accepted: 11/07/2016] [Indexed: 01/06/2023]
Abstract
Autism spectrum disorder (ASD) is associated with physiological abnormalities, including abnormal redox and mitochondrial metabolism. Lymphoblastoid cell lines (LCLs) from some children with ASD exhibit increased oxidative stress, decreased glutathione redox capacity, and highly active mitochondria with increased vulnerability to reactive oxygen species (ROS). Because unaffected siblings (Sibs) of individuals with ASD share some redox abnormalities, we sought to determine whether LCLs from Sibs share ASD-associated mitochondrial abnormalities. We evaluated mitochondrial bioenergetics in 10 sets of LCLs from children with ASD, Sibs, and unrelated/unaffected controls (Cons) after acute increases in ROS. Additionally, intracellular glutathione and uncoupling protein 2 (UCP2) gene expressions were quantified. Compared to Sib LCLs, ASD LCLs exhibited significantly higher ATP-linked respiration, higher maximal and reserve respiratory capacity, and greater glycolysis and glycolytic reserve. ASD LCLs exhibited a significantly greater change in these parameters, with acute increases in ROS compared to both Sib and Con LCLs. Compared to Con, both ASD and Sib LCLs exhibited significantly higher proton leak respiration. Consistent with this, intracellular glutathione redox capacity was decreased and UCP2 gene expression was increased in both ASD and Sib compared to Con LCLs. These data indicate that mitochondrial respiratory function, not abnormal redox homeostasis, distinguishes ASD from unaffected LCLs.-Rose, S., Bennuri, S. C., Wynne, R., Melnyk, S., James, S. J., Frye, R. E. Mitochondrial and redox abnormalities in autism lymphoblastoid cells: a sibling control study.
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Affiliation(s)
- Shannon Rose
- Arkansas Children's Research Institute, Little Rock, Arkansas, USA; and
- Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock, Arkansas, USA
| | - Sirish C Bennuri
- Arkansas Children's Research Institute, Little Rock, Arkansas, USA; and
- Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock, Arkansas, USA
| | - Rebecca Wynne
- Arkansas Children's Research Institute, Little Rock, Arkansas, USA; and
- Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock, Arkansas, USA
| | - Stepan Melnyk
- Arkansas Children's Research Institute, Little Rock, Arkansas, USA; and
- Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock, Arkansas, USA
| | - S Jill James
- Arkansas Children's Research Institute, Little Rock, Arkansas, USA; and
- Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock, Arkansas, USA
| | - Richard E Frye
- Arkansas Children's Research Institute, Little Rock, Arkansas, USA; and
- Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock, Arkansas, USA
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18
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Frye RE, Wynne R, Rose S, Slattery J, Delhey L, Tippett M, Kahler SG, Bennuri SC, Melnyk S, Sequeira JM, Quadros EV. Thyroid dysfunction in children with autism spectrum disorder is associated with folate receptor α autoimmune disorder. J Neuroendocrinol 2017; 29. [PMID: 28199771 DOI: 10.1111/jne.12461] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/14/2015] [Revised: 02/07/2017] [Accepted: 02/09/2017] [Indexed: 12/11/2022]
Abstract
Folate receptor α (FRα) autoantibodies (FRAAs) are prevalent in autism spectrum disorder (ASD). FRAAs disrupt folate transport across the blood-brain barrier by binding to the FRα. Thyroid dysfunction is frequently found in children with ASD. We measured blocking and binding FRAAs and thyroid-stimulating hormone (TSH), free thyroxine (T4) (FT4), total triiodothyronine (T3) (TT3), reverse T3 (rT3), thyroid-releasing hormone (TRH) and other metabolites in 87 children with ASD, 84 of whom also underwent behaviour and cognition testing and in 42 of whom FRAAs, TSH and FT4 were measured at two time points. To better understand the significance of the FRα in relation to thyroid development, we examined FRα expression on prenatal and postnatal thyroid. TSH, TT3 and rT3 were above the normal range in 7%, 33% and 51% of the participants and TRH was below the normal range in 13% of the participants. FT4 was rarely outside the normal range. TSH concentration was positively and the FT4/TSH, TT3/TSH and rT3/TSH ratios were inversely related to blocking FRAA titres. On repeated measurements, changes in TSH and FT4/TSH ratio were found to correspond to changes in blocking FRAA titres. TSH and the FT4/TSH, TT3/TSH and rT3/TSH ratios were related to irritability on the Aberrant Behavior Checklist and several scales of the Social Responsiveness Scale (SRS), whereas TT3 was associated with SRS subscales and TRH was related to Vineland Adaptive Behavior Scale subscales. The thyroid showed significant FRα expression during the early prenatal period, although expression decreased significantly in later gestation and postnatal thyroid tissue. The results of the present study suggest that thyroid dysfunction in ASD may be related to blocking FRAA. The high expression of FRα in the early foetal thyroid suggests that foetal and neonatal exposure to maternal FRAAs could affect the development of the thyroid and may contribute to the pathology in ASD.
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Affiliation(s)
- R E Frye
- Department of Pediatrics, Arkansas Children's Research Institute, University of Arkansas for Medical Sciences, Little Rock, AR, USA
| | - R Wynne
- Department of Pediatrics, Arkansas Children's Research Institute, University of Arkansas for Medical Sciences, Little Rock, AR, USA
| | - S Rose
- Department of Pediatrics, Arkansas Children's Research Institute, University of Arkansas for Medical Sciences, Little Rock, AR, USA
| | - J Slattery
- Department of Pediatrics, Arkansas Children's Research Institute, University of Arkansas for Medical Sciences, Little Rock, AR, USA
| | - L Delhey
- Department of Pediatrics, Arkansas Children's Research Institute, University of Arkansas for Medical Sciences, Little Rock, AR, USA
| | - M Tippett
- Department of Pediatrics, Arkansas Children's Research Institute, University of Arkansas for Medical Sciences, Little Rock, AR, USA
| | - S G Kahler
- Department of Pediatrics, Arkansas Children's Research Institute, University of Arkansas for Medical Sciences, Little Rock, AR, USA
| | - S C Bennuri
- Department of Pediatrics, Arkansas Children's Research Institute, University of Arkansas for Medical Sciences, Little Rock, AR, USA
| | - S Melnyk
- Department of Pediatrics, Arkansas Children's Research Institute, University of Arkansas for Medical Sciences, Little Rock, AR, USA
| | - J M Sequeira
- Department of Medicine, State University of New York - Downstate Medical Center, Brooklyn, NY, USA
| | - E V Quadros
- Department of Medicine, State University of New York - Downstate Medical Center, Brooklyn, NY, USA
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19
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Frye RE, Rose S, Chacko J, Wynne R, Bennuri SC, Slattery JC, Tippett M, Delhey L, Melnyk S, Kahler SG, MacFabe DF. Modulation of mitochondrial function by the microbiome metabolite propionic acid in autism and control cell lines. Transl Psychiatry 2016; 6:e927. [PMID: 27779624 PMCID: PMC5290345 DOI: 10.1038/tp.2016.189] [Citation(s) in RCA: 76] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/12/2016] [Revised: 07/26/2016] [Accepted: 08/02/2016] [Indexed: 12/12/2022] Open
Abstract
Propionic acid (PPA) is a ubiquitous short-chain fatty acid, which is a major fermentation product of the enteric microbiome. PPA is a normal intermediate of metabolism and is found in foods, either naturally or as a preservative. PPA and its derivatives have been implicated in both health and disease. Whereas PPA is an energy substrate and has many proposed beneficial effects, it is also associated with human disorders involving mitochondrial dysfunction, including propionic acidemia and autism spectrum disorders (ASDs). We aimed to investigate the dichotomy between the health and disease effects of PPA by measuring mitochondrial function in ASD and age- and gender-matched control lymphoblastoid cell lines (LCLs) following incubation with PPA at several concentrations and durations both with and without an in vitro increase in reactive oxygen species (ROS). Mitochondrial function was optimally increased at particular exposure durations and concentrations of PPA with ASD LCLs, demonstrating a greater enhancement. In contrast, increasing ROS negated the positive PPA effect with the ASD LCLs, showing a greater detriment. These data demonstrate that enteric microbiome metabolites such as PPA can have both beneficial and toxic effects on mitochondrial function, depending on concentration, exposure duration and microenvironment redox state with these effects amplified in LCLs derived from individuals with ASD. As PPA, as well as enteric bacteria, which produce PPA, have been implicated in a wide variety of diseases, including ASD, diabetes, obesity and inflammatory diseases, insight into this metabolic modulator from the host microbiome may have wide applications for both health and disease.
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Affiliation(s)
- R E Frye
- Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock, AR, USA,Arkansas Children's Research Institute, Little Rock, AR, USA,Arkansas Children's Research Institute, Slot 512-41B, 13 Children's Way, Little Rock, AR 72202, USA. E-mail:
| | - S Rose
- Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock, AR, USA,Arkansas Children's Research Institute, Little Rock, AR, USA
| | - J Chacko
- Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock, AR, USA
| | - R Wynne
- Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock, AR, USA,Arkansas Children's Research Institute, Little Rock, AR, USA
| | - S C Bennuri
- Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock, AR, USA,Arkansas Children's Research Institute, Little Rock, AR, USA
| | - J C Slattery
- Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock, AR, USA,Arkansas Children's Research Institute, Little Rock, AR, USA
| | - M Tippett
- Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock, AR, USA,Arkansas Children's Research Institute, Little Rock, AR, USA
| | - L Delhey
- Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock, AR, USA,Arkansas Children's Research Institute, Little Rock, AR, USA
| | - S Melnyk
- Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock, AR, USA,Arkansas Children's Research Institute, Little Rock, AR, USA
| | - S G Kahler
- Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock, AR, USA,Arkansas Children's Research Institute, Little Rock, AR, USA
| | - D F MacFabe
- Kilee Patchell-Evans Autism Research Group, Division of Developmental Disabilities, Department of Psychology/Psychiatry, University of Western Ontario, London, ON, Canada
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20
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Frye RE, Delhey L, Slattery J, Tippett M, Wynne R, Rose S, Kahler SG, Bennuri SC, Melnyk S, Sequeira JM, Quadros E. Blocking and Binding Folate Receptor Alpha Autoantibodies Identify Novel Autism Spectrum Disorder Subgroups. Front Neurosci 2016; 10:80. [PMID: 27013943 PMCID: PMC4783401 DOI: 10.3389/fnins.2016.00080] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [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: 12/17/2015] [Accepted: 02/18/2016] [Indexed: 11/23/2022] Open
Abstract
Folate receptor α (FRα) autoantibodies (FRAAs) are prevalent in autism spectrum disorder (ASD). They disrupt the transportation of folate across the blood-brain barrier by binding to the FRα. Children with ASD and FRAAs have been reported to respond well to treatment with a form of folate known as folinic acid, suggesting that they may be an important ASD subgroup to identify and treat. There has been no investigation of whether they manifest unique behavioral and physiological characteristics. Thus, in this study we measured both blocking and binding FRAAs, physiological measurements including indices of redox and methylation metabolism and inflammation as well as serum folate and B12 concentrations and measurements of development and behavior in 94 children with ASD. Children positive for the binding FRAA were found to have higher serum B12 levels as compared to those negative for binding FRAAs while children positive for the blocking FRAA were found to have relatively better redox metabolism and inflammation markers as compared to those negative for blocking FRAAs. In addition, ASD children positive for the blocking FRAA demonstrated better communication on the Vineland Adaptive Behavior Scale, stereotyped behavior on the Aberrant Behavioral Checklist and mannerisms on the Social Responsiveness Scale. This study suggests that FRAAs are associated with specific physiological and behavioral characteristics in children with ASD and provides support for the notion that these biomarkers may be useful for subgrouping children with ASD, especially with respect to targeted treatments.
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Affiliation(s)
- Richard E Frye
- Department of Pediatrics, Arkansas Children's Hospital Research Institute, University of Arkansas for Medical Sciences Little Rock, AR, USA
| | - Leanna Delhey
- Department of Pediatrics, Arkansas Children's Hospital Research Institute, University of Arkansas for Medical Sciences Little Rock, AR, USA
| | - John Slattery
- Department of Pediatrics, Arkansas Children's Hospital Research Institute, University of Arkansas for Medical Sciences Little Rock, AR, USA
| | - Marie Tippett
- Department of Pediatrics, Arkansas Children's Hospital Research Institute, University of Arkansas for Medical Sciences Little Rock, AR, USA
| | - Rebecca Wynne
- Department of Pediatrics, Arkansas Children's Hospital Research Institute, University of Arkansas for Medical Sciences Little Rock, AR, USA
| | - Shannon Rose
- Department of Pediatrics, Arkansas Children's Hospital Research Institute, University of Arkansas for Medical Sciences Little Rock, AR, USA
| | - Stephen G Kahler
- Department of Pediatrics, Arkansas Children's Hospital Research Institute, University of Arkansas for Medical Sciences Little Rock, AR, USA
| | - Sirish C Bennuri
- Department of Pediatrics, Arkansas Children's Hospital Research Institute, University of Arkansas for Medical Sciences Little Rock, AR, USA
| | - Stepan Melnyk
- Department of Pediatrics, Arkansas Children's Hospital Research Institute, University of Arkansas for Medical Sciences Little Rock, AR, USA
| | - Jeffrey M Sequeira
- Department of Medicine, State University of New York-Downstate Medical Center Brooklyn, NY, USA
| | - Edward Quadros
- Department of Medicine, State University of New York-Downstate Medical Center Brooklyn, NY, USA
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21
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Goh R, Darvall J, Wynne R, Tatoulis J. Obesity Prevalence and Associated Outcomes in Cardiothoracic Patients: A Single-Centre Experience. Anaesth Intensive Care 2016; 44:77-84. [DOI: 10.1177/0310057x1604400112] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The objective of this study was to investigate the prevalence of obesity and its relationship with adverse outcomes in ICU cardiothoracic patients. We performed a retrospective analysis of cardiothoracic patients admitted to The Royal Melbourne Hospital ICU between 2002 and 2014. Eight thousand and sixty-four patients who underwent coronary artery bypass, valve replacement/repair, or both, were divided into six categories of body mass index using World Health Organization criteria. Prevalence of obesity over time in the ICU was measured and compared to prevalence of obesity in the adult Australian population. The association between obesity and adverse postoperative outcomes was then analysed. Obesity is currently 1.2 times more prevalent in the Royal Melbourne Hospital ICU cardiothoracic patients than in the adult Australian population, with 33.5% of patients having a body mass index ≥30 kg/m2. Over time, this was relatively constant, but an increasing proportion were morbidly obese. Obesity, but not morbid obesity, was associated with reduced 30-day mortality (odds ratio [OR] 0.41). Both obese and morbidly obese patients had reduced odds of return to theatre for bleeding (OR 0.49 and OR 0.19, respectively), but increased odds of new-onset renal failure (OR 1.62 and OR 3.17, respectively). Morbidly obese patients had double the odds of an ICU stay longer than 14 days (OR 2.05). In summary, a growing proportion of our obese ICU patients are morbidly obese, with a dramatically increased length of ICU stay. This has major implications for resource allocation in the ICU, and may inform modelling of future bed utilisation. Obesity, but not morbid obesity, conferred a mortality benefit.
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Affiliation(s)
- R. Goh
- Intensive Care Unit, Royal Melbourne Hospital, Parkville, Victoria
| | - J. Darvall
- Department of Anaesthesia and Pain Management and Intensive Care Unit, Royal Melbourne Hospital and Senior Lecturer in Medical Education – Critical Care, University of Melbourne, Melbourne, Victoria
| | - R. Wynne
- Department of Cardiothoracic Surgery, Royal Melbourne Hospital and Senior Lecturer, Department of Nursing, University of Melbourne, Parkville, Victoria
| | - J. Tatoulis
- Department of Cardiothoracic Surgery, Royal Melbourne Hospital and University of Melbourne, Parkville, Victoria
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Fitzgerald S, Yap C, Zhang B, Denehy L, El-Ansary D, Wynne R. Measuring frailty in elderly cardiac surgery patients: A pilot study. Heart Lung Circ 2015. [DOI: 10.1016/j.hlc.2014.12.142] [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]
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Larobina M, Keenan N, Wynne R, Zentner D, Naidu P, Wilson W, Balding L, Grigg L, Skillington P. Aortic reoperation in adults with corrected Conotruncal defects. Heart Lung Circ 2015. [DOI: 10.1016/j.hlc.2015.06.728] [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]
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Rose S, Frye RE, Slattery J, Wynne R, Tippett M, Pavliv O, Melnyk S, James SJ. Oxidative stress induces mitochondrial dysfunction in a subset of autism lymphoblastoid cell lines in a well-matched case control cohort. PLoS One 2014; 9:e85436. [PMID: 24416410 PMCID: PMC3885720 DOI: 10.1371/journal.pone.0085436] [Citation(s) in RCA: 108] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2013] [Accepted: 11/26/2013] [Indexed: 01/26/2023] Open
Abstract
There is increasing recognition that mitochondrial dysfunction is associated with the autism spectrum disorders. However, little attention has been given to the etiology of mitochondrial dysfunction or how mitochondrial abnormalities might interact with other physiological disturbances associated with autism, such as oxidative stress. In the current study we used respirometry to examine reserve capacity, a measure of the mitochondrial ability to respond to physiological stress, in lymphoblastoid cell lines (LCLs) derived from children with autistic disorder (AD) as well as age and gender-matched control LCLs. We demonstrate, for the first time, that LCLs derived from children with AD have an abnormal mitochondrial reserve capacity before and after exposure to increasingly higher concentrations of 2,3-dimethoxy-1,4-napthoquinone (DMNQ), an agent that increases intracellular reactive oxygen species (ROS). Specifically, the AD LCLs exhibit a higher reserve capacity at baseline and a sharper depletion of reserve capacity when ROS exposure is increased, as compared to control LCLs. Detailed investigation indicated that reserve capacity abnormalities seen in AD LCLs were the result of higher ATP-linked respiration and maximal respiratory capacity at baseline combined with a marked increase in proton leak respiration as ROS was increased. We further demonstrate that these reserve capacity abnormalities are driven by a subgroup of eight (32%) of 25 AD LCLs. Additional investigation of this subgroup of AD LCLs with reserve capacity abnormalities revealed that it demonstrated a greater reliance on glycolysis and on uncoupling protein 2 to regulate oxidative stress at the inner mitochondria membrane. This study suggests that a significant subgroup of AD children may have alterations in mitochondrial function which could render them more vulnerable to a pro-oxidant microenvironment derived from intrinsic and extrinsic sources of ROS such as immune activation and pro-oxidant environmental toxicants. These findings are consistent with the notion that AD is caused by a combination of genetic and environmental factors.
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Affiliation(s)
- Shannon Rose
- Department of Pediatrics, Arkansas Children's Hospital Research Institute, Little Rock, Arkansas, United States of America
| | - Richard E. Frye
- Department of Pediatrics, Arkansas Children's Hospital Research Institute, Little Rock, Arkansas, United States of America
- * E-mail:
| | - John Slattery
- Department of Pediatrics, Arkansas Children's Hospital Research Institute, Little Rock, Arkansas, United States of America
| | - Rebecca Wynne
- Department of Pediatrics, Arkansas Children's Hospital Research Institute, Little Rock, Arkansas, United States of America
| | - Marie Tippett
- Department of Pediatrics, Arkansas Children's Hospital Research Institute, Little Rock, Arkansas, United States of America
| | - Oleksandra Pavliv
- Department of Pediatrics, Arkansas Children's Hospital Research Institute, Little Rock, Arkansas, United States of America
| | - Stepan Melnyk
- Department of Pediatrics, Arkansas Children's Hospital Research Institute, Little Rock, Arkansas, United States of America
| | - S. Jill James
- Department of Pediatrics, Arkansas Children's Hospital Research Institute, Little Rock, Arkansas, United States of America
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Frye RE, Rose S, Slattery J, Wynne R, Tippett M, Melynk S, James SJ. Mitochondrial dysfunction in immune cells derived from children with autism spectrum disorder (ASD): A unique metabolic endophenotype of children with ASD. Mitochondrion 2013. [DOI: 10.1016/j.mito.2013.07.034] [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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Dave B, Wynne R, Su Y, Korourian S, Chang JC, Simmen RCM. Enhanced mammary progesterone receptor-A isoform activity in the promotion of mammary tumor progression by dietary soy in rats. Nutr Cancer 2010; 62:774-82. [PMID: 20661826 DOI: 10.1080/01635581.2010.494334] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Dietary contribution to breast cancer risk, recurrence, and progression remains incompletely understood. Increased consumption of soy and soy isoflavones is associated with reduced mammary cancer susceptibility in women and in rodent models of carcinogenesis. In rats treated with N-methyl-N-nitrosourea, dietary intake of soy protein isolate (SPI) reduced mammary tumor occurrence but increased incidence of more invasive tumors in tumored rats, relative to the control diet casein. Here we evaluated whether mammary tumor progression in tumor-bearing rats lifetime exposed to SPI is associated with deregulated progesterone receptor (PR) isoform expression. In histologically normal mammary glands of rats with invasive ductal carcinoma lesions, PR-A protein levels were higher for SPI- than casein-fed rats, whereas PR-B was undetectable for both groups. Increased mammary PR-A expression was associated with higher transforming growth factor-beta1, stanniocalcin-1, and CD44 transcript levels; lower E-cadherin and estrogen receptor-alpha expression; and reduced apoptotic status in ductal epithelium. Serum progesterone (ng/ml) (CAS: 25.94 +/- 3.81; SPI: 13.19 +/- 2.32) and estradiol (pg/ml) (CAS: 27.9 +/- 4.49; SPI: 68.48 +/- 23.87) levels differed with diet. However, sera from rats of both diet groups displayed comparable mammosphere-forming efficiency in human MCF-7 cells. Thus, soy-rich diets may influence the development of more aggressive tumors by enhancing PR-A-dependent signaling in premalignant breast tissues.
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Affiliation(s)
- Bhuvanesh Dave
- Department of Physiology and Biophysics, University of Arkansas for Medical Sciences, and Arkansas Children's Nutrition Center, Little Rock, AR 72202, USA
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Liava’a M, Theodore S, Antippa P, Wynne R, Slavin M, Grigg A, Tatoulis J. Surgical Management of Pulmonary Invasive Mould Infections In Patients With Haematological Malignancies. Heart Lung Circ 2010. [DOI: 10.1016/j.hlc.2010.04.128] [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: 10/19/2022]
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Cole J, Austwick G, Dawson C, Zhang Z, Wynne R. Virtual agency, embodiment and analgesia in phantom limb pain. Clin Neurophysiol 2007. [DOI: 10.1016/j.clinph.2006.07.290] [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: 11/27/2022]
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Rafii F, Park M, Wynne R. Evidence for active drug efflux in fluoroquinolone resistance in Clostridium hathewayi. Chemotherapy 2005; 51:256-62. [PMID: 16088123 DOI: 10.1159/000087253] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2004] [Accepted: 03/11/2005] [Indexed: 11/19/2022]
Abstract
BACKGROUND Most fluoroquinolones have shown limited effectiveness against anaerobic bacteria. Evidence for a multidrug efflux pump, like those involved in fluoroquinolone resistance in some other bacteria, was investigated in Clostridium hathewayi. METHODS A parent strain of C.hathewayi was isolated from human intestinal microflora on a medium with a low concentration of norfloxacin and a mutant strain was selected from it on a medium with a high concentration of norfloxacin. Fluoroquinolone sensitivity, drug accumulation, and the effects of different concentrations of fluoroquinolones on the kinetics of growth in the presence and absence of efflux pump inhibitors were measured. RESULTS Both strains were resistant to several fluoroquinolones and dyes. The pump inhibitor reserpine increased the sensitivity of both strains to some drugs; it affected the growth kinetics and the efflux of norfloxacin and ethidium bromide. CONCLUSION The efflux of fluoroquinolone appears to be one reason for fluoroquinolone resistance inC. hathewayi.
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Affiliation(s)
- Fatemeh Rafii
- Division of Microbiology, National Center for Toxicological Research, Food and Drug Administration, Jefferson, AR 72079, USA.
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Rafii F, Wynne R, Heinze TM, Paine DD. Mechanism of metronidazole-resistance by isolates of nitroreductase-producing Enterococcus gallinarum and Enterococcus casseliflavus from the human intestinal tract. FEMS Microbiol Lett 2003; 225:195-200. [PMID: 12951241 DOI: 10.1016/s0378-1097(03)00513-5] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Enterococcus casseliflavus and Enterococcus gallinarum strains resistant to metronidazole, nitrofurantoin and nitrofurazone were isolated from fecal samples of a patient with recurrent ulcerative colitis treated with metronidazole. Unlike other metronidazole-resistant bacteria, these strains produced nitroreductase but metabolized metronidazole to compounds that could not be detected by liquid chromatography with UV or mass spectral analysis. Metronidazole-susceptible Clostridium perfringens grew equally well in spent cultures of Enterococcus spp. incubated with or without metronidazole. These data indicate that the nitroreductases produced by these Enterococcus strains did not activate metronidazole to bactericidal metabolites and these bacteria may reduce the effectiveness of metronidazole. We have indirect evidence for an alternative pathway that results in metronidazole resistance. These strains of enterococcus had nitroreductase so resistance should not have occurred.
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Affiliation(s)
- Fatemeh Rafii
- Division of Microbiology, National Center for Toxicological Research/FDA, Jefferson, AR 72079, USA.
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Sanders K, Botti M, Wynne R, Ku R, Ramsay E, Farrington C, Heazlewood R, Nguyen T, Wong P, Steen K. Care of patients undergoing diagnostic and interventional cardiology procedures: A survey of current practice in Australia and New Zealand. Heart Lung Circ 2000. [DOI: 10.1046/j.1443-9506.2000.05900.x] [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: 11/20/2022]
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Wynne R. Training for workplace health promotion in Europe. Promot Educ 1999; 6:20-2, 36, 44-5. [PMID: 10575692 DOI: 10.1177/102538239900600307] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
- R Wynne
- Work Research Centre Ltd., Dublin, Ireland.
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Abstract
The thermal expansion coefficient and dn/dT are measured by interferometry techniques in undoped YAG below 300 K. The thermal expansion coefficient at 125 K is measured to be 2.70 x 10(-6) K(-1) and dn/dT at 633 nm is 2.5 x 10(-6) K(-1), compared with 7 x 10(-6) K(-1) and 9 x 10(-6) K(-1) for these quantities at 300 K.
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Affiliation(s)
- R Wynne
- Lincoln Laboratory, Massachusetts Institute of Technology, 244 Wood Street, Lexington, Massachusetts 02420, USA
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Murphy J, Ryan MP, Murnaghan MF, McGovern B, Cosgrove AP, Allen JD, Silke B, Nelson GIC, Ahuja RC, Taylor SH, Thornton L, Counihan TB, O’Malley E, Nelligan M, Luckwill RG, Murphy F, McKenna J, Hartigan PJ, Moore RE, Tuffery AR, Garrett M, Ghori GMU, Bruton JD, Anwyl A, McLoughlin JV, Sinclair H, Robinson H, Allen JA, Kawai Y, Roddie IC, McHale NG, Allen JM, Rooney M, Finlay RJ, Gebruers EM, Hall WJ, Plant WD, O’Donnell DP, Sheehan JD, O’Connor PC, Andrews JF, Jansky J, Donne B, Walsh K, Cookman CWR, Walton JB, Harvey BJ, Kernan RP, Corbett R, Leonard BE, Phelan P, Regan CM, Tomkins PT, Carroll C, Houghton JA, McClelland RJ, Cotter TG, O’Malley K, Butler J, Pidgeon F, Kelly JG, Kirkpatrick CT, Johnston CF, Kunz-Ramsay YW, Climax J, Lenehan TJ, Lambe R, Brick I, Darragh A, Taaffe WP, Kenny M, Devane C, Joyce P, Maulet C, Gilna P, Geraghty D, Martin F, Moore R, Sheppard BL, Molloy A, Sharma SC, Walzman M, Bonnar J, Dockeray CJ, Daly L, McMurray TJ, Wright PJ, Dundee JW, Clarke RSJ, Greenfield AA, Elwood RJ, Hildebrand PJ, McGowan WAW, Elwood RJ, Hildebrand PJ, Minogue C, Harper KW, Bali IM, Gibson F, Carlisle R, Grainger DJ, Black IHC, McGrath JA, Goldspink DF, McKee G, Murray E, O’Boyle C, Taffe B, Wynne R, Arbuthnott E, Folan J, Walsh A, Barry D, Anwyl R, Rowan M, Rowan MJ, Chambers PL. Royal academy of medicine in Ireland section of biological sciences. Ir J Med Sci 1982. [DOI: 10.1007/bf02940233] [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: 10/21/2022]
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