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Bell SFE, Sweeney EL, Kong FYS, Whiley DM, Bradshaw CS, Tickner JA. Response to the ASHM 2023 statement on the use of doxy-PEP in Australia: considerations and recommendations. Med J Aust 2024; 220:356-360. [PMID: 38479425 DOI: 10.5694/mja2.52255] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2023] [Accepted: 02/20/2024] [Indexed: 04/15/2024]
Affiliation(s)
- Sara F E Bell
- UQ Centre for Clinical Research, University of Queensland, Brisbane, QLD
| | - Emma L Sweeney
- UQ Centre for Clinical Research, University of Queensland, Brisbane, QLD
| | | | - David M Whiley
- UQ Centre for Clinical Research, University of Queensland, Brisbane, QLD
- Pathology Queensland, Brisbane, QLD
| | | | - Jacob A Tickner
- UQ Centre for Clinical Research, University of Queensland, Brisbane, QLD
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Tickner JA, Trembizki E, Whiley DM. Neisseria gonorrhoeae ciprofloxacin susceptibility testing and gyrA targets. Lancet Microbe 2023; 4:e574. [PMID: 37236216 DOI: 10.1016/s2666-5247(23)00149-0] [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] [Received: 04/23/2023] [Accepted: 05/09/2023] [Indexed: 05/28/2023]
Affiliation(s)
- Jacob A Tickner
- UQ Centre for Clinical Research, Faculty of Medicine, University of Queensland, Brisbane 4029, QLD, Australia.
| | - Ella Trembizki
- UQ Centre for Clinical Research, Faculty of Medicine, University of Queensland, Brisbane 4029, QLD, Australia
| | - David M Whiley
- UQ Centre for Clinical Research, Faculty of Medicine, University of Queensland, Brisbane 4029, QLD, Australia; Pathology Queensland Central Laboratory, Queensland Health, Brisbane, QLD, Australia
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Whiley DM, Tickner JA, Kundu RL, Hogan TR, van Hal SJ, Lahra MM. Selection of Neisseria gonorrhoeae ceftriaxone resistance using doxycycline post-exposure prophylaxis. Lancet Infect Dis 2023:S1473-3099(23)00359-6. [PMID: 37321241 DOI: 10.1016/s1473-3099(23)00359-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2023] [Revised: 05/30/2023] [Accepted: 05/31/2023] [Indexed: 06/17/2023]
Affiliation(s)
- David M Whiley
- UQ Centre for Clinical Research, Faculty of Medicine, The University of Queensland, Brisbane, Queensland, Australia; Pathology Queensland Central Laboratory, Queensland Health, Brisbane, Queensland, Australia.
| | - Jacob A Tickner
- UQ Centre for Clinical Research, Faculty of Medicine, The University of Queensland, Brisbane, Queensland, Australia
| | - Ratan L Kundu
- World Health Organization Collaborating Centre for STI and AMR, New South Wales Health Pathology Microbiology, The Prince of Wales Hospital, Randwick, New South Wales, Australia
| | - Tiffany R Hogan
- World Health Organization Collaborating Centre for STI and AMR, New South Wales Health Pathology Microbiology, The Prince of Wales Hospital, Randwick, New South Wales, Australia
| | - Sebastiaan J van Hal
- Department of Infectious Diseases and Microbiology, NSW Health Pathology, Royal Prince Alfred Hospital, Sydney, NSW 2050, Australia; Central Clinical School, University of Sydney, Sydney, NSW 2006, Australia
| | - Monica M Lahra
- World Health Organization Collaborating Centre for STI and AMR, New South Wales Health Pathology Microbiology, The Prince of Wales Hospital, Randwick, New South Wales, Australia; Faculty of Medicine, The University of New South Wales, Sydney, New South Wales, Australia
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Tickner JA, Lahra MM, Whiley DM. The need for a commercial test using the penA60 allele to identify ceftriaxone-resistant Neisseria gonorrhoeae. Lancet Infect Dis 2022; 22:1271-1272. [PMID: 35961361 DOI: 10.1016/s1473-3099(22)00520-5] [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] [Received: 07/12/2022] [Revised: 07/25/2022] [Accepted: 07/26/2022] [Indexed: 06/15/2023]
Affiliation(s)
- Jacob A Tickner
- UQ Centre for Clinical Research, Faculty of Medicine, The University of Queensland, Brisbane, QLD 4029, Australia
| | - Monica M Lahra
- World Health Organization Collaborating Centre for STI and AMR, New South Wales Health Pathology Microbiology, The Prince of Wales Hospital, Randwick, NSW, Australia; School of Medical Sciences, The University of New South Wales, Sydney, NSW, Australia
| | - David M Whiley
- UQ Centre for Clinical Research, Faculty of Medicine, The University of Queensland, Brisbane, QLD 4029, Australia; Pathology Queensland Central Laboratory, Queensland Health, Brisbane, QLD, Australia.
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Tickner JA, Bradshaw CS, Murray GL, Whiley DM, Sweeney EL. Novel probe-based melting curve assays for the characterization of fluoroquinolone resistance in Mycoplasma genitalium. J Antimicrob Chemother 2022; 77:1592-1599. [PMID: 35352120 PMCID: PMC9155627 DOI: 10.1093/jac/dkac097] [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] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2021] [Accepted: 02/26/2022] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND Mycoplasma genitalium infection is a sexually transmitted infection that has rapidly become resistant to mainstay treatments. While individualized treatment approaches have been recommended and adopted for macrolides, individualized therapy for fluoroquinolones has not yet been explored, due to a lack of commercial molecular assays and a lack of confidence in specific mutations associated with resistance. In another recent study, we defined a clear role and diagnostic utility in focusing on the absence of resistance mutations to inform microbial cure with fluoroquinolone antimicrobials. METHODS We developed two proof-of-concept molecular tests that focus on detection of M. genitalium and characterization of WT parC sequences that are strongly linked to fluoroquinolone susceptibility. RESULTS We screened a total of 227 M. genitalium-positive samples using novel molecular beacon and dual hybridization probe assays. These assays were able to detect M. genitalium and characterize fluoroquinolone susceptibility in 143/227 (63%) samples, based on clear differences in melting peak temperatures. The results of these molecular assays were in 100% agreement with 'gold standard' Sanger sequencing. Additionally, WT parC sequences were readily distinguished from M. genitalium samples harbouring parC mutations of known or suspected clinical significance. The ability of the assays to successfully characterize fluoroquinolone susceptibility and resistance was reduced in low M. genitalium load samples. CONCLUSIONS These proof-of-concept assays have considerable potential to improve individualized treatment approaches and rationalize tests of cure for M. genitalium infection. The ability to initiate individualized treatment in up to two-thirds of cases will enhance antimicrobial stewardship for this challenging pathogen.
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Affiliation(s)
- Jacob A. Tickner
- The University of Queensland Centre for Clinical Research (UQ-CCR), Faculty of Medicine, The University of Queensland, Brisbane, Queensland, Australia
| | - Catriona S. Bradshaw
- Melbourne Sexual Health Centre, Alfred Hospital and Central Clinical School, Monash University, Melbourne, Victoria, Australia
- Central Clinical School, Monash University, Melbourne, Victoria, Australia
| | - Gerald L. Murray
- The Department of Obstetrics and Gynaecology, University of Melbourne, Parkville, Victoria, Australia
- Centre for Women’s Infectious Diseases, The Royal Women’s Hospital, Parkville, Victoria, Australia
- Molecular Microbiology Research Group, Murdoch Children’s Research Institute, Parkville, Victoria, Australia
| | - David M. Whiley
- The University of Queensland Centre for Clinical Research (UQ-CCR), Faculty of Medicine, The University of Queensland, Brisbane, Queensland, Australia
- Pathology Queensland Central Laboratory, Queensland, Australia
| | - Emma L. Sweeney
- The University of Queensland Centre for Clinical Research (UQ-CCR), Faculty of Medicine, The University of Queensland, Brisbane, Queensland, Australia
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Tickner JA, Urquhart AJ, Stephenson SA, Richard DJ, O'Byrne KJ. Functions and therapeutic roles of exosomes in cancer. Front Oncol 2014; 4:127. [PMID: 24904836 PMCID: PMC4034415 DOI: 10.3389/fonc.2014.00127] [Citation(s) in RCA: 180] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2014] [Accepted: 05/13/2014] [Indexed: 12/24/2022] Open
Abstract
The role of exosomes in cancer development has become the focus of much research, due to the many emerging roles possessed by exosomes. These micro-vesicles that are ubiquitously released in to the extracellular milieu, have been found to regulate immune system function, particularly in tumorigenesis, as well as conditioning future metastatic sites for the attachment and growth of tumor tissue. Through an interaction with a range of host tissue, exosomes are able to generate a pro-tumor environment that is essential for carcinogenesis. Herein, we discuss the contents of exosomes and their contribution to tumorigenesis, as well as their role in chemotherapeutic resistance and the development of novel cancer treatments and the identification of cancer biomarkers.
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Affiliation(s)
- Jacob A Tickner
- Cancer and Ageing Research Program, Translational Research Institute, Queensland University of Technology , Brisbane, QLD , Australia
| | - Aaron J Urquhart
- Cancer and Ageing Research Program, Translational Research Institute, Queensland University of Technology , Brisbane, QLD , Australia
| | - Sally-Anne Stephenson
- Eph Receptor Biology Group, Translational Research Institute, Queensland University of Technology , Brisbane, QLD , Australia
| | - Derek J Richard
- Cancer and Ageing Research Program, Translational Research Institute, Queensland University of Technology , Brisbane, QLD , Australia
| | - Kenneth J O'Byrne
- Cancer and Ageing Research Program, Translational Research Institute, Queensland University of Technology , Brisbane, QLD , Australia
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Abstract
BACKGROUND Polyvinyl chloride plastics (PVC), made flexible through the addition of di-2-ethylhexyl phthalate (DEHP), are used in the production of a wide array of medical devices. From the late 1960s, leaching of DEHP from PVC medical devices and ultimate tissue deposition have been documented. METHODS A critical review of DEHP exposure, metabolism, and toxicity data from human and animals studies was undertaken. A brief analysis of alternatives to DEHP-plasticized PVC for use in medical device manufacture was completed. RESULTS DEHP leaches in varying concentrations into solutions stored in PVC medical devices. Certain populations, including dialysis patients and hemophiliacs may have long-term exposures to clinically important doses of DEHP, while others, such as neonates and the developing fetus, may have exposures at critical points in development. In vivo and in vitro research links DEHP or its metabolites to a range of adverse effects in the liver, reproductive tract, kidneys, lungs, and heart. Developing animals are particularly susceptible to effects on the reproductive system. Some adverse effects in animal studies occur at levels of exposure experienced by patients in certain clinical settings. DEHP appears to pose a relatively low risk of hepatic cancer in humans. However, given lingering uncertainties about the relevance of the mechanism of action of carcinogenic effects in rodents for humans and interindividual variability, the possibility of DEHP-related carcinogenic responses in humans cannot be ruled out. CONCLUSIONS The observed toxicity of DEHP and availability of alternatives to many DEHP-containing PVC medical devices presents a compelling argument for moving assertively, but carefully, to the substitution of other materials for PVC in medical devices. The substitution of other materials for PVC would have an added worker and community health benefit of reducing population exposures to DEHP, reducing the creation of dioxin from PVC production and disposal, and reducing risks from vinyl chloride monomer exposure.
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Affiliation(s)
- J A Tickner
- Lowell Center for Sustainable Production, Department of Work Environment, University of Massachusetts, Lowell, MA 01854, USA.
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Abstract
The precautionary principle is increasingly discussed in debates about threats to health and the environment, particularly when government actions might inhibit free trade. It is gaining recognition as an overarching principle of decision-making, one that underlies efforts for sustainable development. Pronouncements about the precautionary principle have focused generally on the responsibility of government to act in the face of uncertainty and the shifting of burdens onto proponents. This assumes that government will have the resources, knowledge, expertise, and will to act. The role of the public those who may be affected by environmental degradation or their representatives is mostly missing from the discussions. This article outlines a rationale for why participation is critical and explores the theory of citizen participation. The article also describes participatory models used around the world, primarily examples of citizen participation though various models also exist for workers.
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Affiliation(s)
- J A Tickner
- UMASS Lowell, Work Environment Department, MA 01854, USA
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Abstract
The plausible threat to children from environmental exposures and uncertainty as to the magnitude and nature of potentially harmful effects provide a rationale for taking precautionary measures to prevent such exposures. The authors present principles for applying precaution to children's environmental health, and policy tools for implementing them. A stronger focus on primary prevention and a better understanding of the risks are needed.
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Affiliation(s)
- J A Tickner
- Lowell Center for Sustainable Production, University of Massachusetts Lowell, Boston 01854, USA.
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Tickner JA. Hazardous exports: the u.s. Transfer of risk assessment to central and eastern europe. New Solut 1996; 6:3-12. [PMID: 22909803 DOI: 10.2190/ns6.4.a] [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: 06/01/2023]
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Ager BP, Tickner JA. The control of microbiological hazards associated with air-conditioning and ventilation systems. Ann Occup Hyg 1983; 27:341-58. [PMID: 6362519 DOI: 10.1093/annhyg/27.4.341] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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