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Fang Q, Poon AWC, Fisher KR, Duong J, Lee JS. Coproduction with peer support groups: A new approach to culturally responsive social services. Am J Community Psychol 2024. [PMID: 38329016 DOI: 10.1002/ajcp.12734] [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] [Subscribe] [Scholar Register] [Received: 02/03/2023] [Revised: 10/18/2023] [Accepted: 12/18/2023] [Indexed: 02/09/2024]
Abstract
The disparity of access to suitable social services for people from culturally diverse backgrounds is receiving increased attention. Coproduction between service users and providers has the potential as an approach to improve the cultural responsiveness of social services. What remains unknown is how social service organizations can facilitate and support coproduction with people from culturally diverse backgrounds. This article examines how three disability support organizations in Australia worked with peer support groups run by people with disability and their families from Chinese background to improve the organizations' service provision. We collected qualitative data through observations of activities in the groups and semistructured interviews with group members and organization staff. We found that organizing peer support groups facilitated knowledge exchange between people from culturally diverse backgrounds and organizations to inform practice development. Five contributors to the knowledge exchange were as follows: (1) assigning staff responsibility for exchange and trust with the group; (2) encouraging the group to challenge practice and cultural norms; (3) identifying and supporting the capacity of peer facilitators; (4) fostering trust within the group; and (5) collaborating with other organizations. Cultural responsiveness means incorporating people's cultural preferences in support provision and addressing the negative influences of cultural norms on people.
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Affiliation(s)
- Qian Fang
- UniSA Justice & Society, University of South Australia, Adelaide, South Australia, Australia
| | - Abner Weng Cheong Poon
- School of Social Sciences, University of New South Wales (UNSW), Sydney, New South Wales, Australia
| | - Karen R Fisher
- Social Policy Research Centre, University of New South Wales (UNSW), Sydney, New South Wales, Australia
| | | | - Jung-Sook Lee
- School of Social Sciences, University of New South Wales (UNSW), Sydney, New South Wales, Australia
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Duong J, Pryer S, Walsh C, Fitzpatrick A, Magill J, Simmonds S, Yang D, Baird-Peddie O, Rahman F, Hayter C, Tavener M. 'Nothing About Us Without Us': exploring benefits and challenges of peer support for people with disability in peer support organisations - protocol paper for a qualitative coproduction project. BMJ Open 2023; 13:e073920. [PMID: 38097246 PMCID: PMC10882202 DOI: 10.1136/bmjopen-2023-073920] [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] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/18/2023] Open
Abstract
INTRODUCTION One in six people live with disability in Australia with higher levels of disability of people from diverse communities, such as those with culturally and linguistically diverse (CALD) backgrounds. In Australia, CALD refers to people from diverse ethnicity and cultures, nationalities, societal structures and religions that may or may not speak a language other than English. This study employs researchers with lived experience of disability and peer support to study the impact of peer support for people with disability, including people from CALD backgrounds, in two peer-led organisations in New South Wales (NSW) Australia. METHODS AND ANALYSIS This study uses participatory action research and inclusive research design with researchers with lived experience, having lived experience of disability and a peer in the disability community, leading the research.Over three years, three different groups will be recruited through Community Disability Alliance Hunter (CDAH) and Diversity and Disability Alliance (DDAlliance): (1) peers with disability, (2) peer leaders with disability and (3) researchers with lived experience of disability and peer support. Data collection and creation methods include semistructured interviews, surveys and focus groups. Qualitative data will be analysed using thematic analysis through the lens of the researchers with lived experience. ETHICS AND DISSEMINATION Ethical approval was granted by the University of Newcastle Human Research Ethics Committee (Approval No: H-2021-0088). Dissemination includes peer-reviewed publications, presentations at local, national and international conferences and written reports for user-led organisations, disability service providers, disability agencies and people with disability.
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Affiliation(s)
- Julie Duong
- Diversity Disability Alliance, Sydney, New South Wales, Australia
| | - Shaylie Pryer
- Community Disability Alliance Hunter, Newcastle, New South Wales, Australia
| | - Catherine Walsh
- Diversity Disability Alliance, Sydney, New South Wales, Australia
| | - Arron Fitzpatrick
- Community Disability Alliance Hunter, Newcastle, New South Wales, Australia
| | - Julie Magill
- Diversity Disability Alliance, Sydney, New South Wales, Australia
| | - Sarah Simmonds
- Community Disability Alliance Hunter, Newcastle, New South Wales, Australia
| | - David Yang
- Community Disability Alliance Hunter, Newcastle, New South Wales, Australia
| | - Owen Baird-Peddie
- Community Disability Alliance Hunter, Newcastle, New South Wales, Australia
| | - Farhana Rahman
- Diversity Disability Alliance, Sydney, New South Wales, Australia
| | - Carrie Hayter
- Carrie Hayter Consulting, Sydney, New South Wales, Australia
| | - Meredith Tavener
- College of Health Medicine and Wellbeing, The University of Newcastle, Callaghan, New South Wales, Australia
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Duong J, Stewart-Lord A, Nariyangadu P, Harrison M, Tsang YM. Treatment outcomes of stereotactic ablative body radiotherapy on oligometastases from colorectal cancer: early results of a single institution service evaluation. BJR Open 2022; 4:20210071. [PMID: 36105422 PMCID: PMC9459869 DOI: 10.1259/bjro.20210071] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2021] [Revised: 02/09/2022] [Accepted: 03/02/2022] [Indexed: 11/05/2022] Open
Abstract
Objective Stereotactic ablative radiotherapy (SABR) has been suggested to be an effective non-invasive ablative therapy for oligometastases originated from colorectal cancer (CRC). This study aimed to report CRC oligometastases SABR treatment outcomes in terms of overall survival (OS), progression-free survival (PFS) and post-treatment toxicities. Methods Treatment records of patients with CRC metachronous oligometastases who underwent SABR at a single institution between February 2015 and December 2018 were retrospectively reviewed. OS and PFS were calculated using Kaplan-Meier statistics and post-RT toxicity data was scored following CTCAE v. 4.0. Analysis of prognostic factors on OS and PFS was performed based on site of primary cancer, types of treatment to primary cancer, number of oligometastases, SABR treatment sites, intervals between treatment to primary cancer and SABR to oligometastases, biological equivalent dose, cumulative gross tumour volume and planning target volume. Results 75 patients with 86 CRC metachronous oligometastases (including liver, lung, lymph nodes and bone) were included. The median age was 65.5 years (range 42.5-87.2) with a median follow-up of 23.8 months (range 3.1-46.5). The estimated median PFS was 14.6 months (95% CI 9.6-19.6). and estimated median OS was 33.3 months (95% CI 22.9-43.7). Majority of patients tolerated SABR well with the most common acute side-effects of Grade 1 fatigue. No Grade 3 or higher toxicities were reported at any time points.Only SABR treatment sites (p = 0.03) and cumulative volumes of planning target volume (p = 0.02) were found to be statistically significant independent predictors of PFS and OS respectively. Conclusion This study showed modest PFS, OS, and post-treatment toxicity outcomes on SABR to metachronous oligometastases from CRC. It has highlighted that cumulative tumour volume may be a stronger prognostic factor of OS comparing to the number of metastases. Advances in knowledge There are limited data published on the efficacy and post-treatment toxicity of CRC oligometastases SABR with adequate length of follow-up. Our retrospective study suggests that cumulative tumour volume may be a stronger prognostic factor of OS comparing to the number of oligometastases.
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Affiliation(s)
- Julie Duong
- Mount Vernon Cancer Centre, Northwood, Middlesex HA6 2RN, UK
| | - Adele Stewart-Lord
- School of Health and Social Care, London Southbank University, London, UK
| | | | - Mark Harrison
- Mount Vernon Cancer Centre, Northwood, Middlesex HA6 2RN, UK
| | - Yat Man Tsang
- Mount Vernon Cancer Centre, Northwood, Middlesex HA6 2RN, UK
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Duong J, Tsang Y, Harrison M. PO-1912: Clinical experience of using stereotactic ablative body radiotherapy on inoperable pancreatic cancer. Radiother Oncol 2020. [DOI: 10.1016/s0167-8140(21)01930-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Robinson J, Burrage M, Ngai S, Mackenzie E, Duong J, Mollee P, Korczyk D. 062 99Tc-DPD Bone Scintigraphy Correlates With Left Ventricular Wall Thickness and Global Longitudinal Strain in Patients With ATTR Wild Type Cardiac Amyloidosis. Heart Lung Circ 2020. [DOI: 10.1016/j.hlc.2020.09.069] [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: 11/15/2022]
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Gölkel C, Wu A, Chiuzan C, Duong J, Bernd P, Kielstein H. Early internationalization of students in a German medical school in the former German Democratic Republic. Ann Anat 2019; 225:42-47. [PMID: 30930197 DOI: 10.1016/j.aanat.2019.03.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2018] [Revised: 03/03/2019] [Accepted: 03/18/2019] [Indexed: 12/30/2022]
Abstract
The growing influence and importance of internationalization in higher education, especially in medical education, inspired anatomists at Columbia University New York, USA and at the Martin Luther University Halle-Wittenberg, Germany, to start a novel international preclinical collaboration project. As part of the anatomy dissection course a group of volunteer medical students from Halle dissected selected areas of the human body with the help of an English, illustrated, iPad-run dissection script (American Dissector). Meanwhile the rest of the students worked with a traditional German text-based dissector. Additionally, participating German students were matched with US students, with whom they connected via video-conferencing and discussed subjects like differences between their health care systems, structure and content of the anatomy course and the differences in their medical education systems. Questionnaires were sent for feedback and checklists confirmed dissection findings. Results indicated that the American Dissector was successfully shared internationally. The majority (62%) found it easier to find structures using the American Dissector compared to the standard dissector and also 62% needed the atlas two times less when using the American Dissector. Furthermore, students enjoyed their interaction with their international peers and the vast majority (77%) wished there were more interactions like this in the medical curriculum. This publication describes an approach to embed internationalization in the preclinical medical curriculum based in the gross anatomy course in a German Medical school, located in East Germany. Considering its history as a former German Democratic Republic faculty this is a meaningful step towardglobalization of medical education in this part of Germany.
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Affiliation(s)
- C Gölkel
- Institute of Anatomy and Cell Biology, Martin Luther University Halle-Wittenberg, Faculty of Medicine, Halle (Saale), Germany
| | - A Wu
- Department of Pathology and Cell Biology, Columbia University, New York, USA
| | - C Chiuzan
- Department of Biostatistics, Mailman School of Public Health, Columbia University, New York, USA
| | - J Duong
- Department of Biostatistics, Mailman School of Public Health, Columbia University, New York, USA
| | - P Bernd
- Department of Pathology and Cell Biology, Columbia University, New York, USA
| | - H Kielstein
- Institute of Anatomy and Cell Biology, Martin Luther University Halle-Wittenberg, Faculty of Medicine, Halle (Saale), Germany.
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Wynn J, Ottman R, Duong J, Wilson AL, Ahimaz P, Martinez J, Rabin R, Rosen E, Webster R, Au C, Cho MT, Egan C, Guzman E, Primiano M, Shaw JE, Sisson R, Klitzman RL, Appelbaum PS, Lichter-Konecki U, Anyane-Yeboa K, Iglesias A, Chung WK. Diagnostic exome sequencing in children: A survey of parental understanding, experience and psychological impact. Clin Genet 2018; 93:1039-1048. [PMID: 29266212 DOI: 10.1111/cge.13200] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2017] [Revised: 11/10/2017] [Accepted: 11/13/2017] [Indexed: 12/21/2022]
Abstract
Clinical exome sequencing (CES) is increasingly being used as an effective diagnostic tool in the field of pediatric genetics. We sought to evaluate the parental experience, understanding and psychological impact of CES by conducting a survey study of English-speaking parents of children who had diagnostic CES. Parents of 192 unique patients participated. The parent's interpretation of the child's result agreed with the clinician's interpretation in 79% of cases, with more frequent discordance when the clinician's interpretation was uncertain. The majority (79%) reported no regret with the decision to have CES. Most (65%) reported complete satisfaction with the genetic counseling experience, and satisfaction was positively associated with years of genetic counselor (GC) experience. The psychological impact of CES was greatest for parents of children with positive results and for parents with anxiety or depression. The results of this study are important for helping clinicians to prepare families for the possible results and variable psychological impact of CES. The frequency of parental misinterpretation of test results indicates the need for additional clarity in the communication of results. Finally, while the majority of patients were satisfied with their genetic counseling, satisfaction was lower for new GCs, suggesting a need for targeted GC training for genomic testing.
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Affiliation(s)
- J Wynn
- Division of Clinical Genetics, Department of Pediatrics, Columbia University Medical Center, New York, New York
| | - R Ottman
- G.H. Sergievsky Center and Departments of Epidemiology and Neurology, Columbia University Medical Center and NY State Psychiatric Institute, New York, New York
| | - J Duong
- Department of Sociomedical Sciences, Mailman School of Public Health, Columbia University, New York, New York
| | - A L Wilson
- Division of Clinical Genetics, Department of Pediatrics, New York Presbyterian Hospital, Columbia University, New York, New York
| | - P Ahimaz
- Division of Clinical Genetics, Department of Pediatrics, Columbia University Medical Center, New York, New York
| | - J Martinez
- Division of Clinical Genetics, Department of Pediatrics, Columbia University Medical Center, New York, New York
| | - R Rabin
- College of Liberal Arts and Sciences, Long Island University - Post Campus, Brookville, New York
| | - E Rosen
- College of Liberal Arts and Sciences, Long Island University - Post Campus, Brookville, New York
| | - R Webster
- Columbia University Medical School, New York, New York
| | - C Au
- Division of Clinical Genetics, Department of Pediatrics, New York Presbyterian Hospital, Columbia University, New York, New York
| | - M T Cho
- Division of Clinical Genetics, Department of Pediatrics, New York Presbyterian Hospital, Columbia University, New York, New York.,GeneDx, Gaithersburg, Maryland
| | - C Egan
- Division of Clinical Genetics, Department of Pediatrics, New York Presbyterian Hospital, Columbia University, New York, New York
| | - E Guzman
- Division of Clinical Genetics, Department of Pediatrics, New York Presbyterian Hospital, Columbia University, New York, New York
| | - M Primiano
- Division of Clinical Genetics, Department of Pediatrics, New York Presbyterian Hospital, Columbia University, New York, New York
| | - J E Shaw
- Division of Clinical Genetics, Department of Pediatrics, New York Presbyterian Hospital, Columbia University, New York, New York
| | - R Sisson
- Division of Clinical Genetics, Department of Pediatrics, New York Presbyterian Hospital, Columbia University, New York, New York
| | - R L Klitzman
- Department of Psychiatry, Columbia University Medical Center and NY State Psychiatric Institute, New York, New York
| | - P S Appelbaum
- Department of Psychiatry, Columbia University Medical Center and NY State Psychiatric Institute, New York, New York
| | - U Lichter-Konecki
- Division of Clinical Genetics, Department of Pediatrics, Columbia University Medical Center, New York, New York
| | - K Anyane-Yeboa
- Division of Clinical Genetics, Department of Pediatrics, Columbia University Medical Center, New York, New York
| | - A Iglesias
- Division of Clinical Genetics, Department of Pediatrics, Columbia University Medical Center, New York, New York
| | - W K Chung
- Division of Clinical Genetics, Department of Pediatrics, Columbia University Medical Center, New York, New York.,Department of Medicine, Columbia University Medical Center, New York, New York
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Miller K, Schwenk E, Meloccaro A, Rueschhoff A, Wiens R, Duong J, Chalise P, LeClaire E. 59: Differences in apical repair at time of hysterectomy for patients with pelvic organ prolapse at a Midwestern community hospital. Am J Obstet Gynecol 2018. [DOI: 10.1016/j.ajog.2017.12.078] [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: 10/18/2022]
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LeClaire E, Duong J, Wykes R, Miller K, Winterton T, Bimali M. 15: Randomized controlled trial of belladonna and opiate suppository during intradetrusor onabotulinum toxin-A injection. Am J Obstet Gynecol 2018. [DOI: 10.1016/j.ajog.2017.12.033] [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: 11/30/2022]
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10
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Miller K, LeClaire E, Wykes R, Duong J. 18: The sling stone case report: Managing a case of urethral calculus due to malpositioned sling. Am J Obstet Gynecol 2018. [DOI: 10.1016/j.ajog.2017.12.141] [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: 10/18/2022]
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11
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Tharmalingam H, Tsang Y, Duong J, Silverman S, Brooks C, Harrison M. Clinical Experience of Stereotactic Ablative Body Radiation Therapy for the Treatment of Oligometastases Originating from Lower Gastrointestinal Primary Malignancies. Int J Radiat Oncol Biol Phys 2017. [DOI: 10.1016/j.ijrobp.2017.06.1060] [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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Workentine M, Poonja A, Waddell B, Duong J, Storey DG, Gregson D, Somayaji R, Rabin HR, Surette MG, Parkins MD. Development and Validation of a PCR Assay To Detect the Prairie Epidemic Strain of Pseudomonas aeruginosa from Patients with Cystic Fibrosis. J Clin Microbiol 2016; 54:489-91. [PMID: 26659208 PMCID: PMC4733202 DOI: 10.1128/jcm.02603-15] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [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: 09/27/2015] [Accepted: 11/24/2015] [Indexed: 11/20/2022] Open
Abstract
The monitoring of epidemic Pseudomonas aeruginosa is important for cystic fibrosis (CF) infection control. The prairie epidemic strain (PES) is common in western Canadian CF clinics. Using whole-genome sequencing, we identified a novel genomic island and developed a PCR assay for PES. Against a collection of 186 P. aeruginosa isolates, the assay had 98% sensitivity and 100% specificity.
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Affiliation(s)
- M Workentine
- Department of Veterinary Medicine, University of Calgary, Calgary, Canada
| | - A Poonja
- Department of Microbiology, Immunology, and Infectious Diseases, University of Calgary, Calgary, Canada
| | - B Waddell
- Department of Microbiology, Immunology, and Infectious Diseases, University of Calgary, Calgary, Canada
| | - J Duong
- Department of Biological Sciences, University of Calgary, Calgary, Canada
| | - D G Storey
- Department of Microbiology, Immunology, and Infectious Diseases, University of Calgary, Calgary, Canada Department of Biological Sciences, University of Calgary, Calgary, Canada
| | - D Gregson
- Department of Microbiology, Immunology, and Infectious Diseases, University of Calgary, Calgary, Canada Department of Medicine, University of Calgary, Calgary, Canada
| | - R Somayaji
- Department of Microbiology, Immunology, and Infectious Diseases, University of Calgary, Calgary, Canada Department of Medicine, University of Calgary, Calgary, Canada
| | - H R Rabin
- Department of Microbiology, Immunology, and Infectious Diseases, University of Calgary, Calgary, Canada Department of Medicine, University of Calgary, Calgary, Canada
| | - M G Surette
- Department of Microbiology, Immunology, and Infectious Diseases, University of Calgary, Calgary, Canada Department of Medicine, McMaster University, Hamilton, Ontario, Canada Department of Biochemistry, McMaster University, Hamilton, Ontario, Canada The Farncombe Family Digestive Health Research Institute, McMaster University, Hamilton, Ontario, Canada
| | - M D Parkins
- Department of Microbiology, Immunology, and Infectious Diseases, University of Calgary, Calgary, Canada Department of Medicine, University of Calgary, Calgary, Canada
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Ogawa L, Benallack G, Heffner A, Duong J, Rosenblatt R, Buere C, Nibbe Y, Mahmoud E. Assessment of longitudinal efficacy of community based intervention for
schistosomiasis in Mara District, Lake Victoria region of Tanzania. Ann Glob Health 2015. [DOI: 10.1016/j.aogh.2015.02.803] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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Mody K, Dionizovik-Dimanovski M, Duong J, Levin A, Garan A, Colombo P, Takayama H, Yuzefpolskaya M, Restaino S, Naka Y, Mancini D, Jorde U, Uriel N. Safety and Efficacy of Pre Transplant Desensitization of Patients Supported by CF-LVADs. J Heart Lung Transplant 2014. [DOI: 10.1016/j.healun.2014.01.299] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
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15
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Mody K, Duong J, Dionizovik-Dimanovski M, Levin A, Garan A, Fried J, Takayama H, Yuzefpolskaya M, Colombo P, Restaino S, Naka Y, Mancini D, Jorde U, Uriel N. Five -Fold Increase in Antibody-Mediated Rejection (AMR) Post-Heart Transplant in Patients Developing Allosensitization During Left Ventricular Assist Device Support (LVAD). J Heart Lung Transplant 2014. [DOI: 10.1016/j.healun.2014.01.301] [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: 11/25/2022] Open
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Liu HB, Voso MT, Gumiero D, Duong J, McKendrick JJ, Dear AE. The anti-leukemic effect of a novel histone deacetylase inhibitor MCT-1 and 5-aza-cytidine involves augmentation of Nur77 and inhibition of MMP-9 expression. Int J Oncol 2009; 34:573-579. [PMID: 19148494] [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: 05/27/2023] Open
Abstract
A combination of demethylating agents and histone deacetylase inhibitors (HDACi) has been proposed as a novel therapy in leukemia and myelodysplasia. In HL-60 cells azacytidine (AZA) and Metacept-1 (MCT-1), a novel HDACi augmented inhibition of cell growth and increased apoptosis. In identifying a molecular mechanism responsible for these effects MCT-1 alone and in combination with AZA induced p15INK4b, p21WAF1/CIP1 and Caspase-3 whilst attenuating Bcl-XL expression. Interestingly, MCT-1 in combination with AZA significantly induced the recently identified suppressor of leukemogenesis Nur77 and attenuated AZA-induced MMP-9 expression. The combination of MCT-1 and AZA is more effective in inhibiting leukemic cell growth and induction of apoptosis. Regulation of a recently identified tumour suppressor gene together with cell cycle, apoptosis and matrix degrading proteases may underpin the molecular mechanism responsible for these effects.
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Affiliation(s)
- H B Liu
- Australian Centre for Blood Diseases, Eastern Clinical Research Unit, Monash University, and Department of Oncology, Box Hill Hospital, Melbourne, Victoria, Australia
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Abstract
T cell activation is regulated by the innate immune system through positive and negative costimulatory molecules. B7-H3 is a novel B7-like molecule with a putative receptor on activated T cells. Human B7-H3 was first described as a positive costimulator, most potently inducing IFN-gamma production and cellular immunity. In this study we examined the expression and function of mouse B7-H3. B7-H3 is mostly expressed on professional APCs; its expression on dendritic cells appears to be up-regulated by LPS. In contrast to human B7-H3, we found that mouse B7-H3 protein inhibited T cell activation and effector cytokine production. An antagonistic mAb to B7-H3 enhanced T cell proliferation in vitro and led to exacerbated experimental autoimmune encephalomyelitis in vivo. Therefore, mouse B7-H3 serves as a negative regulator of T cell activation and function.
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Affiliation(s)
- Durbaka V R Prasad
- Department of Immunology, University of Washington School of Medicine, Seattle, WA 98195, USA
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Zhang Y, Blattman JN, Kennedy NJ, Duong J, Nguyen T, Wang Y, Davis RJ, Greenberg PD, Flavell RA, Dong C. Regulation of innate and adaptive immune responses by MAP kinase phosphatase 5. Nature 2004; 430:793-7. [PMID: 15306813 DOI: 10.1038/nature02764] [Citation(s) in RCA: 191] [Impact Index Per Article: 9.6] [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: 04/05/2004] [Accepted: 06/17/2004] [Indexed: 11/08/2022]
Abstract
Mitogen-activated protein (MAP) kinases are essential regulators in immune responses, and their activities are modulated by kinases and phosphatases. MAP kinase phosphatase (MKP) is a family of dual-specificity phosphatases whose function is evolutionarily conserved. A number of mammalian MKPs have been identified so far, but their specific physiological functions in negative regulation of MAP kinases have not been genetically defined. Here we examine innate and adaptive immune responses in the absence of MKP5. JNK activity was selectively increased in Mkp5 (also known as Dusp10)-deficient mouse cells. Mkp5-deficient cells produced greatly enhanced levels of pro-inflammatory cytokines during innate immune responses and exhibited greater T-cell activation than their wild-type counterparts. However, Mkp5-deficient T cells proliferated poorly upon activation, which resulted in increased resistance to experimental autoimmune encephalomyelitis. By contrast, Mkp5-deficient CD4(+) and CD8(+) effector T cells produced significantly increased levels of cytokines compared with wild-type cells, which led to much more robust and rapidly fatal immune responses to secondary infection with lymphocytic choriomeningitis virus. Therefore, MKP5 has a principal function in both innate and adaptive immune responses, and represents a novel target for therapeutic intervention of immune diseases.
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Affiliation(s)
- Yongliang Zhang
- Department of Immunology, University of Washington, Seattle, Washington 98195-7650, USA
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Nurieva RI, Duong J, Kishikawa H, Dianzani U, Rojo JM, Ho IC, Flavell RA, Dong C. Transcriptional regulation of th2 differentiation by inducible costimulator. Immunity 2003; 18:801-11. [PMID: 12818161 DOI: 10.1016/s1074-7613(03)00144-4] [Citation(s) in RCA: 118] [Impact Index Per Article: 5.6] [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: 01/05/2023]
Abstract
Helper T (Th) cell differentiation is accompanied by complex transcriptional changes. Although costimulatory receptors are important in Th differentiation, the underlying mechanisms are poorly understood. Here we examine the transcriptional mechanisms by which ICOS regulates Th2 differentiation and selective IL-4 expression by effector T cells. We found impaired expression of c-Maf transcription factor functionally associated with the IL-4 defect in ICOS(-/-) cells. c-Maf expression in effector cells was regulated by IL-4 levels during Th differentiation. ICOS costimulation potentiated the T cell receptor (TcR)-mediated initial IL-4 production, possibly through the enhancement of NFATc1 expression. These data indicate that ICOS, by enhancing TcR signals at an early stage of T cell activation, regulates IL-4 transcription and T cell function in effector cells.
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Affiliation(s)
- Roza I Nurieva
- Department of Immunology, University of Washington School of Medicine, Seattle, WA 98195, USA
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Abstract
CD4(+) helper Th cells play a major role in the pathogenesis of rheumatoid arthritis. Th cell activation, differentiation, and immune function are regulated by costimulatory molecules. Inducible costimulator (ICOS) is a novel costimulatory receptor expressed on activated T cells. We, as well as others, recently demonstrated its importance in Th2 cytokine expression and Ab class switching by B cells. In this study, we examined the role of ICOS in rheumatoid arthritis using a collagen-induced arthritis model. We found that ICOS knockout mice on the DBA/1 background were completely resistant to collagen-induced arthritis and exhibited absence of joint tissue inflammation. These mice, when immunized with collagen, exhibited reduced anti-collagen IgM Ab's in the initial stage and IgG2a Ab's at the effector phase of collagen-induced arthritis. Furthermore, ICOS regulates the in vitro and in vivo expression of IL-17, a proinflammatory cytokine implicated in rheumatoid arthritis. These data indicate that ICOS is essential for collagen-induced arthritis and may suggest novel means for treating patients with rheumatoid arthritis.
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Affiliation(s)
- Roza I Nurieva
- Department of Immunology, and. Department of Comparative Medicine, University of Washington School of Medicine, Seattle, Washington, USA
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Cahir-McFarland ED, Davidson DM, Schauer SL, Duong J, Kieff E. NF-kappa B inhibition causes spontaneous apoptosis in Epstein-Barr virus-transformed lymphoblastoid cells. Proc Natl Acad Sci U S A 2000; 97:6055-60. [PMID: 10811897 PMCID: PMC18557 DOI: 10.1073/pnas.100119497] [Citation(s) in RCA: 216] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Epstein-Barr virus (EBV) transforms B lymphocytes into lymphoblastoid cell lines usurping the Notch and tumor necrosis factor receptor pathways to effect transcription including NF-kappaB activation. To determine whether NF-kappaB activity is essential in the growth and survival of EBV-transformed lymphoblastoid cell lines, a nondegradable IkappaBalpha mutant was expressed under tetracycline regulation. Despite continued Bcl-2 and Bcl-x/L expression, NF-kappaB inhibition induced apoptosis as evidenced by poly(ADP-ribose) polymerase cleavage, nuclear condensation and fragmentation, and hypodiploid DNA content. Both caspase 3 and 8 activation and loss of mitochondrial membrane potential were observed in apoptotic cells. However, caspase inhibition failed to block apoptosis. These experiments indicate that NF-kappaB inhibitors may be useful in the therapy of EBV-induced cellular proliferation.
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Affiliation(s)
- E D Cahir-McFarland
- The Channing Laboratory and Department of Infectious Diseases, Brigham and Women's Hospital, 181 Longwood Avenue, Boston, MA 02130, USA
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Chang JC, Hurst TL, Johnson CD, Duong J. A soldering index made with 4-META adhesive resin. J Prosthet Dent 1994; 72:430-2. [PMID: 7990050 DOI: 10.1016/0022-3913(94)90565-7] [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] [Indexed: 01/28/2023]
Abstract
Soldering indexes are most often made of fast-setting impression plaster or autopolymerizing resin. Lack of adhesive bonding between these materials and the casting requires the use of a bulky index to support the fixed partial denture components. The advent of adhesive resins improves the quality of the index and simplifies the procedure. A procedure for making a soldering index with 4-META adhesive resin is described that involves direct bonding of the resin to the metal castings. This procedure is accurate, simple, and time-saving. It can be used inside or outside the mouth, in prosthodontic or implant dentistry.
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Affiliation(s)
- J C Chang
- Department of Prosthodontics, University of Texas, Dental Branch, Houston
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