1
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Seewoo BJ, Goodes LM, Mofflin L, Mulders YR, Wong EV, Toshniwal P, Brunner M, Alex J, Johnston B, Elagali A, Gozt A, Lyle G, Choudhury O, Solomons T, Symeonides C, Dunlop SA. The plastic health map: A systematic evidence map of human health studies on plastic-associated chemicals. Environ Int 2023; 181:108225. [PMID: 37948868 DOI: 10.1016/j.envint.2023.108225] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Revised: 09/15/2023] [Accepted: 09/19/2023] [Indexed: 11/12/2023]
Abstract
BACKGROUND The global production and use of plastic materials has increased dramatically since the 1960s and there is increasing evidence of human health impacts related to exposure to plastic-associated chemicals. There is, however, no comprehensive, regulatory, post-market monitoring for human health effects of plastic-associated chemicals or particles and it is unclear how many of these have been investigated for effects in humans, and therefore what the knowledge gaps are. OBJECTIVE To create a systematic evidence map of peer-reviewed human studies investigating the potential effects of exposure to plastic-associated particles/chemicals on health to identify research gaps and provide recommendations for future research and regulation policy. METHODS Medline and Embase databases were used to identify peer-reviewed primary human studies published in English from Jan 1960 - Jan 2022 that investigated relationships between exposures to included plastic-associated particles/chemicals measured and detected in bio-samples and human health outcomes. Plastic-associated particles/chemicals included are: micro and nanoplastics, due to their widespread occurrence and potential for human exposure; polymers, the main building blocks of plastic; plasticizers and flame retardants, the two most common types of plastic additives with the highest concentration ranges in plastic materials; and bisphenols and per- or polyfluoroalkyl substances, two chemical classes of known health concern that are common in plastics. We extracted metadata on the population and study characteristics (country, intergenerational, sex, age, general/special exposure risk status, study design), exposure (plastic-associated particle/chemical, multiple exposures), and health outcome measures (biochemical, physiological, and/or clinical), from which we produced the interactive database 'Plastic Health Map' and a narrative summary. RESULTS We identified 100,949 unique articles, of which 3,587 met our inclusion criteria and were used to create a systematic evidence map. The Plastic Health Map with extracted metadata from included studies are freely available at https://osf.io/fhw7d/ and summary tables, plots and overall observations are included in this report. CONCLUSIONS We present the first evidence map compiling human health research on a wide range of plastic-associated chemicals from several different chemical classes, in order to provide stakeholders, including researchers, regulators, and concerned individuals, with an efficient way to access published literature on the matter and determine knowledge gaps. We also provide examples of data clusters to facilitate systematic reviews and research gaps to help direct future research efforts. Extensive gaps are identified in the breadth of populations, exposures and outcomes addressed in studies of potential human health effects of plastic-associated chemicals. No studies of the human health effects of micro and/or nanoplastics were found, and no studies were found for 26/1,202 additives included in our search that are of known hazard concern and confirmed to be in active production. Few studies have addressed recent "substitution" chemicals for restricted additives such as organophosphate flame retardants, phthalate substitutes, and bisphenol analogues. We call for a paradigm shift in chemical regulation whereby new plastic chemicals are rigorously tested for safety before being introduced in consumer products, with ongoing post-introduction biomonitoring of their levels in humans and health effects throughout individuals' life span, including in old age and across generations.
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Affiliation(s)
- Bhedita J Seewoo
- Plastics, Minderoo Foundation, 171-173 Mounts Bay Road 6000, Perth, WA, Australia; School of Biological Sciences, The University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia
| | - Louise M Goodes
- Plastics, Minderoo Foundation, 171-173 Mounts Bay Road 6000, Perth, WA, Australia; School of Biological Sciences, The University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia
| | - Louise Mofflin
- Plastics, Minderoo Foundation, 171-173 Mounts Bay Road 6000, Perth, WA, Australia; School of Biological Sciences, The University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia
| | - Yannick R Mulders
- Plastics, Minderoo Foundation, 171-173 Mounts Bay Road 6000, Perth, WA, Australia; School of Biological Sciences, The University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia
| | - Enoch Vs Wong
- Plastics, Minderoo Foundation, 171-173 Mounts Bay Road 6000, Perth, WA, Australia; School of Biological Sciences, The University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia
| | - Priyanka Toshniwal
- Plastics, Minderoo Foundation, 171-173 Mounts Bay Road 6000, Perth, WA, Australia; School of Biological Sciences, The University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia
| | - Manuel Brunner
- Plastics, Minderoo Foundation, 171-173 Mounts Bay Road 6000, Perth, WA, Australia; School of Molecular Sciences, The University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia
| | - Jennifer Alex
- Plastics, Minderoo Foundation, 171-173 Mounts Bay Road 6000, Perth, WA, Australia
| | - Brady Johnston
- Plastics, Minderoo Foundation, 171-173 Mounts Bay Road 6000, Perth, WA, Australia
| | - Ahmed Elagali
- Plastics, Minderoo Foundation, 171-173 Mounts Bay Road 6000, Perth, WA, Australia; School of Biological Sciences, The University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia
| | - Aleksandra Gozt
- Plastics, Minderoo Foundation, 171-173 Mounts Bay Road 6000, Perth, WA, Australia
| | - Greg Lyle
- Plastics, Minderoo Foundation, 171-173 Mounts Bay Road 6000, Perth, WA, Australia; School of Population Health, Curtin University, Kent St, Bentley WA 6102, Australia
| | - Omrik Choudhury
- Plastics, Minderoo Foundation, 171-173 Mounts Bay Road 6000, Perth, WA, Australia
| | - Terena Solomons
- Plastics, Minderoo Foundation, 171-173 Mounts Bay Road 6000, Perth, WA, Australia; Health and Medical Sciences (Library), The University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia
| | - Christos Symeonides
- Plastics, Minderoo Foundation, 171-173 Mounts Bay Road 6000, Perth, WA, Australia; Murdoch Children's Research Institute, Royal Children's Hospital, 50 Flemington Rd, Parkville, VIC 3052, Australia
| | - Sarah A Dunlop
- Plastics, Minderoo Foundation, 171-173 Mounts Bay Road 6000, Perth, WA, Australia; School of Biological Sciences, The University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia.
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2
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Goodes LM, Wong EVS, Alex J, Mofflin L, Toshniwal P, Brunner M, Solomons T, White E, Choudhury O, Seewoo BJ, Mulders YR, Dale T, Newman HJ, Naveed A, Lowe AB, Hendrie DV, Symeonides C, Dunlop SA. A scoping review protocol on in vivo human plastic exposure and health impacts. Syst Rev 2022; 11:137. [PMID: 35790998 PMCID: PMC9258212 DOI: 10.1186/s13643-022-02010-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/06/2021] [Accepted: 06/18/2022] [Indexed: 12/02/2022] Open
Abstract
BACKGROUND Global plastic production has increased exponentially since the 1960s, with more than 6300 million metric tons of plastic waste generated to date. Studies have found a range of human health outcomes associated with exposure to plastic chemicals. However, only a fraction of plastic chemicals used have been studied in vivo, and then often in animals, for acute toxicological effects. With many questions still unanswered about how long-term exposure to plastic impacts human health, there is an urgent need to map human in vivo research conducted to date, casting a broad net by searching terms for a comprehensive suite of plastic chemical exposures and the widest range of health domains. METHODS This protocol describes a scoping review that will follow the recommended framework outlined in the 2017 Guidance for the Conduct of Joanna Briggs Institute (JBI) Scoping Reviews, to be reported in accordance with Preferred Reporting Items for Systematic Reviews and Meta-Analyses extension for Scoping Reviews (PRISMA-ScR) Checklist. A literature search of primary clinical studies in English from 1960 onwards will be conducted in MEDLINE (Ovid) and EMBASE (Ovid) databases. References eligible for inclusion will be identified through a quality-controlled, multi-level screening process. Extracted data will be presented in diagrammatic and tabular form, with a narrative summary addressing the review questions. DISCUSSION This scoping review will comprehensively map the primary research undertaken to date on plastic exposure and human health. Secondary outputs will include extensive databases on plastic chemicals and human health outcomes/impacts. SYSTEMATIC REVIEW REGISTRATION Open Science Framework (OSF)-Standard Pre-Data Collection Registration, https://archive.org/details/osf-registrations-gbxps-v1 , https://doi.org/10.17605/OSF.IO/GBXPS.
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Affiliation(s)
- Louise M Goodes
- Minderoo Foundation, 171 - 173 Mounts Bay Road, Perth, WA, 6000, Australia.,School of Biological Sciences, The University of Western Australia, 35 Stirling Highway, Crawley, WA, 6009, Australia
| | - Enoch V S Wong
- Minderoo Foundation, 171 - 173 Mounts Bay Road, Perth, WA, 6000, Australia
| | - Jennifer Alex
- Minderoo Foundation, 171 - 173 Mounts Bay Road, Perth, WA, 6000, Australia
| | - Louise Mofflin
- Minderoo Foundation, 171 - 173 Mounts Bay Road, Perth, WA, 6000, Australia
| | - Priyanka Toshniwal
- Minderoo Foundation, 171 - 173 Mounts Bay Road, Perth, WA, 6000, Australia
| | - Manuel Brunner
- Minderoo Foundation, 171 - 173 Mounts Bay Road, Perth, WA, 6000, Australia.,School of Molecular Sciences, The University of Western Australia, 35 Stirling Highway, Crawley, WA, 6009, Australia
| | - Terena Solomons
- Health and Medical Sciences (Library), The University of Western Australia, 35 Stirling Highway, Crawley, WA, 6009, Australia
| | - Emily White
- Minderoo Foundation, 171 - 173 Mounts Bay Road, Perth, WA, 6000, Australia
| | - Omrik Choudhury
- Minderoo Foundation, 171 - 173 Mounts Bay Road, Perth, WA, 6000, Australia
| | - Bhedita J Seewoo
- Minderoo Foundation, 171 - 173 Mounts Bay Road, Perth, WA, 6000, Australia.,School of Biological Sciences, The University of Western Australia, 35 Stirling Highway, Crawley, WA, 6009, Australia
| | - Yannick R Mulders
- Minderoo Foundation, 171 - 173 Mounts Bay Road, Perth, WA, 6000, Australia
| | - Tristan Dale
- Minderoo Foundation, 171 - 173 Mounts Bay Road, Perth, WA, 6000, Australia.,Fiona Stanley Hospital, 11 Warren Drive, Murdoch, WA, 6150, Australia.,UWA Medical School, Faculty of Health and Medical Sciences, 35 Stirling Highway, Crawley, WA, 6009, Australia
| | - Hamish J Newman
- Minderoo Foundation, 171 - 173 Mounts Bay Road, Perth, WA, 6000, Australia.,Sir Charles Gairdner Hospital, Hospital Ave, Nedlands, WA, 6009, Australia.,School of Human Sciences, The University of Western Australia, 35 Stirling Highway, Crawley, WA, 6009, Australia
| | - Alina Naveed
- Minderoo Foundation, 171 - 173 Mounts Bay Road, Perth, WA, 6000, Australia
| | - Andrew B Lowe
- School of Molecular & Life Sciences, Curtin University, Kent St, Bentley, WA, 6102, Australia
| | - Delia V Hendrie
- School of Population Health, Curtin University, Kent St, Bentley, WA, 6102, Australia
| | - Christos Symeonides
- Minderoo Foundation, 171 - 173 Mounts Bay Road, Perth, WA, 6000, Australia.,Murdoch Children's Research Institute, Royal Children's Hospital, 50 Flemington Rd, Parkville, VIC, 3052, Australia
| | - Sarah A Dunlop
- Minderoo Foundation, 171 - 173 Mounts Bay Road, Perth, WA, 6000, Australia. .,School of Biological Sciences, The University of Western Australia, 35 Stirling Highway, Crawley, WA, 6009, Australia.
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3
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Symeonides C, Brunner M, Mulders Y, Toshniwal P, Cantrell M, Mofflin L, Dunlop S. Buy-now-pay-later: Hazards to human and planetary health from plastics production, use and waste. J Paediatr Child Health 2021; 57:1795-1804. [PMID: 34792231 PMCID: PMC9299614 DOI: 10.1111/jpc.15777] [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] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/27/2021] [Accepted: 09/27/2021] [Indexed: 12/15/2022]
Abstract
More than 8 billion tonnes of plastic were produced between 1950 and 2015, that is 1 tonne for every man, woman and child on our planet. Global plastic production has been growing exponentially with an annual growth rate of 8.4% since 1950, equating to approximately 380 million tonnes per annum. A further 50 kg of plastic is now being produced for each person every year with production continuing to accelerate. Here, we discuss the human and planetary health hazards of all that plastic. We consider each step in the journey of these complex and pervasive industrial materials: from their synthesis predominantly from fossil fuel feedstocks, through an often-brief consumer use as plastic products, and onto waste streams as fuel, permanent landfill or as unmanaged waste in our environment, food, air and bodies.
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Affiliation(s)
- Christos Symeonides
- Plastics & Human HealthThe Minderoo FoundationPerthWestern AustraliaAustralia,Murdoch Children's Research InstituteRoyal Children's HospitalMelbourneVictoriaAustralia
| | - Manuel Brunner
- Plastics & Human HealthThe Minderoo FoundationPerthWestern AustraliaAustralia
| | - Yannick Mulders
- Plastics & Human HealthThe Minderoo FoundationPerthWestern AustraliaAustralia
| | - Priyanka Toshniwal
- Plastics & Human HealthThe Minderoo FoundationPerthWestern AustraliaAustralia
| | - Matthew Cantrell
- Plastics & Human HealthThe Minderoo FoundationPerthWestern AustraliaAustralia
| | - Louise Mofflin
- Plastics & Human HealthThe Minderoo FoundationPerthWestern AustraliaAustralia
| | - Sarah Dunlop
- Plastics & Human HealthThe Minderoo FoundationPerthWestern AustraliaAustralia,School of Biological SciencesThe University of Western AustraliaPerthWestern AustraliaAustralia
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4
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Toshniwal P, Nguyen M, Guédin A, Viola H, Ho D, Kim Y, Bhatt U, Bond CS, Hool L, Hurley LH, Mergny JL, Fear M, Wood F, Iyer SK, Smith NM. TGF-β-induced fibrotic stress increases G-quadruplex formation in human fibroblasts. FEBS Lett 2019; 593:3149-3161. [PMID: 31677274 DOI: 10.1002/1873-3468.13658] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [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: 07/18/2019] [Revised: 10/07/2019] [Accepted: 10/22/2019] [Indexed: 11/11/2022]
Abstract
Scar formation after wound healing is a major medical problem. A better understanding of the dynamic nuclear architecture of the genome during wound healing could provide insights into the underlying pathophysiology and enable novel therapeutic strategies. Here, we demonstrate that TGF-β-induced fibrotic stress increases formation of the dynamic secondary DNA structures called G-quadruplexes in skin fibroblasts, which is coincident with increased expression of collagen 1. This G-quadruplex formation is attenuated by a small molecule inhibitor of intracellular Ca2+ influx and an anti-fibrotic compound. In addition, we identify G-quadruplex-forming sequences in the promoter region of COL1A1, which encodes collagen 1, and confirm their ability to form G-quadruplex structures under physiologically relevant conditions. Our findings reveal a link between G-quadruplexes and scar formation that may lead to novel therapeutic interventions.
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Affiliation(s)
- Priyanka Toshniwal
- School of Molecular Sciences, The University of Western Australia, Perth, Australia
| | - Michelle Nguyen
- School of Molecular Sciences, The University of Western Australia, Perth, Australia
| | - Aurore Guédin
- ARNA Laboratory, IECB, INSERM U1212, CNRS UMR5320, Université de Bordeaux, Pessac, France
| | - Helena Viola
- School of Human Sciences, The University of Western Australia, Perth, Australia
| | - Diwei Ho
- School of Molecular Sciences, The University of Western Australia, Perth, Australia
| | - Yongeun Kim
- College of Pharmacy, University of Arizona, Tucson, Arizona, USA
| | - Uditi Bhatt
- School of Molecular Sciences, The University of Western Australia, Perth, Australia
| | - Charles S Bond
- School of Molecular Sciences, The University of Western Australia, Perth, Australia
| | - Livia Hool
- School of Human Sciences, The University of Western Australia, Perth, Australia.,Victor Chang Cardiac Research Institute, Sydney, Australia
| | | | - Jean-Louis Mergny
- ARNA Laboratory, IECB, INSERM U1212, CNRS UMR5320, Université de Bordeaux, Pessac, France.,Institut Curie, CNRS UMR9187, INSERM U1196, Université Paris Saclay, Orsay, France
| | - Mark Fear
- Fiona Wood Foundation and Burn Injury Research Unit, The University of Western Australia, Perth, Australia
| | - Fiona Wood
- Fiona Wood Foundation and Burn Injury Research Unit, The University of Western Australia, Perth, Australia
| | - Swaminathan K Iyer
- School of Molecular Sciences, The University of Western Australia, Perth, Australia
| | - Nicole M Smith
- School of Molecular Sciences, The University of Western Australia, Perth, Australia
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5
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Ho D, Kretzmann JA, Norret M, Toshniwal P, Veder JP, Jiang H, Guagliardo P, Munshi AM, Chawla R, Evans CW, Clemons TD, Nguyen M, Kretzmann AL, Blythe AJ, Saunders M, Archer M, Fitzgerald M, Keelan JA, Bond CS, Kilburn MR, Hurley LH, Smith NM, Iyer KS. Intracellular speciation of gold nanorods alters the conformational dynamics of genomic DNA. Nat Nanotechnol 2018; 13:1148-1153. [PMID: 30297819 DOI: 10.1038/s41565-018-0272-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2018] [Accepted: 09/03/2018] [Indexed: 05/10/2023]
Abstract
Gold nanorods are one of the most widely explored inorganic materials in nanomedicine for diagnostics, therapeutics and sensing1. It has been shown that gold nanorods are not cytotoxic and localize within cytoplasmic vesicles following endocytosis, with no nuclear localization2,3, but other studies have reported alterations in gene expression profiles in cells following exposure to gold nanorods, via unknown mechanisms4. In this work we describe a pathway that can contribute to this phenomenon. By mapping the intracellular chemical speciation process of gold nanorods, we show that the commonly used Au-thiol conjugation, which is important for maintaining the noble (inert) properties of gold nanostructures, is altered following endocytosis, resulting in the formation of Au(I)-thiolates that localize in the nucleus5. Furthermore, we show that nuclear localization of the gold species perturbs the dynamic microenvironment within the nucleus and triggers alteration of gene expression in human cells. We demonstrate this using quantitative visualization of ubiquitous DNA G-quadruplex structures, which are sensitive to ionic imbalances, as an indicator of the formation of structural alterations in genomic DNA.
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Affiliation(s)
- Diwei Ho
- School of Molecular Sciences, The University of Western Australia, Perth, Western Australia, Australia
| | - Jessica A Kretzmann
- School of Molecular Sciences, The University of Western Australia, Perth, Western Australia, Australia
| | - Marck Norret
- School of Molecular Sciences, The University of Western Australia, Perth, Western Australia, Australia
| | - Priyanka Toshniwal
- School of Molecular Sciences, The University of Western Australia, Perth, Western Australia, Australia
| | - Jean-Pierre Veder
- John de Laeter Centre, Curtin University, Perth, Western Australia, Australia
| | - Haibo Jiang
- School of Molecular Sciences, The University of Western Australia, Perth, Western Australia, Australia
- Centre for Microscopy, Characterisation and Analysis, The University of Western Australia, Perth, Western Australia, Australia
| | - Paul Guagliardo
- Centre for Microscopy, Characterisation and Analysis, The University of Western Australia, Perth, Western Australia, Australia
| | - Alaa M Munshi
- School of Molecular Sciences, The University of Western Australia, Perth, Western Australia, Australia
- Department of Chemistry, Faculty of Applied Science, Umm Al-Qura University, Makkah, Saudi Arabia
| | - Reena Chawla
- College of Pharmacy, University of Arizona, Tucson, AZ, USA
- BIO5 Institute, University of Arizona, Tucson, AZ, USA
- Arizona Cancer Center, University of Arizona, Tucson, AZ, USA
| | - Cameron W Evans
- School of Molecular Sciences, The University of Western Australia, Perth, Western Australia, Australia
| | - Tristan D Clemons
- School of Molecular Sciences, The University of Western Australia, Perth, Western Australia, Australia
| | - Michelle Nguyen
- School of Molecular Sciences, The University of Western Australia, Perth, Western Australia, Australia
| | - Amy L Kretzmann
- School of Molecular Sciences, The University of Western Australia, Perth, Western Australia, Australia
| | - Amanda J Blythe
- School of Molecular Sciences, The University of Western Australia, Perth, Western Australia, Australia
| | - Martin Saunders
- School of Molecular Sciences, The University of Western Australia, Perth, Western Australia, Australia
- Centre for Microscopy, Characterisation and Analysis, The University of Western Australia, Perth, Western Australia, Australia
| | - Michael Archer
- School of Biological Sciences, The University of Western Australia, Perth, Western Australia, Australia
| | - Melinda Fitzgerald
- School of Biological Sciences, The University of Western Australia, Perth, Western Australia, Australia
- Curtin Health Innovation Research Institute, Curtin University, Perth, Western Australia, Australia
- Perron Institute for Neurological and Translational Science, Sarich Neuroscience Research Institute, Perth, Western Australia, Australia
| | - Jeffrey A Keelan
- Schools of Obstetrics & Gynaecology and Biomedical Sciences, The University of Western Australia, Perth, Western Australia, Australia
| | - Charles S Bond
- School of Molecular Sciences, The University of Western Australia, Perth, Western Australia, Australia
| | - Matt R Kilburn
- Centre for Microscopy, Characterisation and Analysis, The University of Western Australia, Perth, Western Australia, Australia
| | - Laurence H Hurley
- College of Pharmacy, University of Arizona, Tucson, AZ, USA
- BIO5 Institute, University of Arizona, Tucson, AZ, USA
- Arizona Cancer Center, University of Arizona, Tucson, AZ, USA
| | - Nicole M Smith
- School of Molecular Sciences, The University of Western Australia, Perth, Western Australia, Australia.
| | - K Swaminathan Iyer
- School of Molecular Sciences, The University of Western Australia, Perth, Western Australia, Australia.
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6
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Chaudhari N, Toshniwal P, Clemons T, Stevenson A, Ryan E, Jarolimek W, Wood F, Fear M. 527 Targeting Lysyl Oxidase (LOX) Activity to Improve Scar Appearance. J Burn Care Res 2018. [DOI: 10.1093/jbcr/iry006.450] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Affiliation(s)
- N Chaudhari
- University of Western Australia, Crawley, Australia; Pharmaxis Ltd, Sydney, Australia; burns service Western Australia, Murdoch, Australia
| | - P Toshniwal
- University of Western Australia, Crawley, Australia; Pharmaxis Ltd, Sydney, Australia; burns service Western Australia, Murdoch, Australia
| | - T Clemons
- University of Western Australia, Crawley, Australia; Pharmaxis Ltd, Sydney, Australia; burns service Western Australia, Murdoch, Australia
| | - A Stevenson
- University of Western Australia, Crawley, Australia; Pharmaxis Ltd, Sydney, Australia; burns service Western Australia, Murdoch, Australia
| | - E Ryan
- University of Western Australia, Crawley, Australia; Pharmaxis Ltd, Sydney, Australia; burns service Western Australia, Murdoch, Australia
| | - W Jarolimek
- University of Western Australia, Crawley, Australia; Pharmaxis Ltd, Sydney, Australia; burns service Western Australia, Murdoch, Australia
| | - F Wood
- University of Western Australia, Crawley, Australia; Pharmaxis Ltd, Sydney, Australia; burns service Western Australia, Murdoch, Australia
| | - M Fear
- University of Western Australia, Crawley, Australia; Pharmaxis Ltd, Sydney, Australia; burns service Western Australia, Murdoch, Australia
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7
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Clemons TD, Bradshaw M, Toshniwal P, Chaudhari N, Stevenson AW, Lynch J, Fear M, Wood FM, Iyer KS. Coherency image analysis to quantify collagen architecture: implications in scar assessment. RSC Adv 2018; 8:9661-9669. [PMID: 35540841 PMCID: PMC9078703 DOI: 10.1039/c7ra12693j] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [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: 11/23/2017] [Accepted: 02/27/2018] [Indexed: 11/21/2022] Open
Abstract
A novel technique for the fast and robust quantification of collagen architecture following scarring.
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Affiliation(s)
- T. D. Clemons
- School of Molecular Sciences M313
- The University of Western Australia
- Crawley
- Australia
| | - M. Bradshaw
- School of Molecular Sciences M313
- The University of Western Australia
- Crawley
- Australia
| | - P. Toshniwal
- School of Molecular Sciences M313
- The University of Western Australia
- Crawley
- Australia
| | - N. Chaudhari
- School of Molecular Sciences M313
- The University of Western Australia
- Crawley
- Australia
| | - A. W. Stevenson
- Fiona Wood Foundation and Burn Injury Research Unit
- The University of Western Australia, M318
- Crawley
- Australia
| | - J. Lynch
- Fiona Wood Foundation and Burn Injury Research Unit
- The University of Western Australia, M318
- Crawley
- Australia
- Royal College of Surgeon's of Ireland
| | - M. W. Fear
- Fiona Wood Foundation and Burn Injury Research Unit
- The University of Western Australia, M318
- Crawley
- Australia
| | - F. M. Wood
- Fiona Wood Foundation and Burn Injury Research Unit
- The University of Western Australia, M318
- Crawley
- Australia
| | - K. Swaminathan Iyer
- School of Molecular Sciences M313
- The University of Western Australia
- Crawley
- Australia
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8
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Parviz M, Toshniwal P, Viola HM, Hool LC, Fear PMW, Wood FM, Gaus K, Iyer KS, Gooding JJ. Real-Time Bioimpedance Sensing of Antifibrotic Drug Action in Primary Human Cells. ACS Sens 2017; 2:1482-1490. [PMID: 28871791 DOI: 10.1021/acssensors.7b00442] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Fibrotic diseases are among the most serious health issues with severe burdens due to their chronic nature and a large number of patients suffering from the debilitating effects and long-term sequelae. Collagenase treatment is a nonsurgical option but has limited results. To date, there is no potent noninvasive solution for fibrosis. Part of the reason for this is the lack of appropriate in vitro live cell screening tools to assess the efficacy of new therapeutical agents. Here, we demonstrate the utility of a cell-based electrochemical impedance biosensor platform to screen the efficacy of potential antifibrotic compounds. The platform employs a label-free and noninvasive strategy to detect the progression of fibrosis and the potency of the antifibrotic molecules in real-time. The fundamental principle that governs this novel system is that dynamic changes in cell shape and adhesion during fibrosis can be measured accurately by monitoring the changes in the impedance. This is achieved by growing the cells on a transparent interdigitated indium tin oxide (ITO) electrodes. It was demonstrated by monitoring the efficacy of a model antifibrotic compound, PXS64, on cells collected from patients with Dupuytren's contracture. We confirmed the validity of the developed biochemical impedance biosensor as an tool for in vitro screening of antifibrotic compounds and provided quantitative information on subcellular influences of the examined chemical molecules using correlative microscopy analyses that monitor the average cell area, cell morphology, and the amount and directionality of the deposited extracellular matrix protein collagen and measurement of cytosolic Ca2+ changes.
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Affiliation(s)
| | | | | | - Livia C. Hool
- Victor Chang Cardiac Research Institute, Darlinghurst, New South Wales 2010, Australia
| | - P. Mark W. Fear
- Burns
Service of Western Australia, Royal Perth Hospital, Perth, Western Australia 6000, Australia
| | - Fiona M. Wood
- Burns
Service of Western Australia, Royal Perth Hospital, Perth, Western Australia 6000, Australia
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9
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Agarwal V, Toshniwal P, Smith NE, Smith NM, Li B, Clemons TD, Byrne LT, Kakulas F, Wood FM, Fear M, Corry B, Swaminathan Iyer K. Enhancing the efficacy of cation-independent mannose 6-phosphate receptor inhibitors by intracellular delivery. Chem Commun (Camb) 2016; 52:327-30. [DOI: 10.1039/c5cc06826f] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Intracellular delivery of M6P/IGFII receptor inhibitors exhibits better efficacy than extracellular inhibitors to regulate TGFβ1 mediated upregulation of profibrotic marker, collagen I.
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Li B, Clemons TD, Agarwal V, Kretzmann J, Bradshaw M, Toshniwal P, Smith NM, Li S, Fear M, Wood FM, Swaminathan Iyer K. Regulation of collagen expression using nanoparticle mediated inhibition of TGF-β activation. NEW J CHEM 2016. [DOI: 10.1039/c5nj03115j] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Polymeric nanoparticle for delivery of an effective anti-fibrotic agent in an in vitro model of scarring.
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Toshniwal P. Demyelinating optic neuropathy with Miller-Fisher syndrome. The case for overlap syndromes with central and peripheral demyelination. J Neurol 1987; 234:353-8. [PMID: 3612209 DOI: 10.1007/bf00314295] [Citation(s) in RCA: 33] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
The syndrome of ataxia, areflexia and ophthalmoplegia, or Miller-Fisher syndrome, has been considered to be a variant of Guillain-Barré syndrome with pathology restricted to the peripheral nervous system. A patient with Miller-Fisher syndrome and bilateral demyelinating optic neuropathy suggesting associated central nervous system pathology is presented. Clinical and experimental evidence regarding the association of central and peripheral nervous system demyelination is reviewed.
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Toshniwal P. Optic perineuritis with secondary syphilis. J Clin Neuroophthalmol 1987; 7:6-10. [PMID: 2952683] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Optic perineuritis is characterized by swollen optic discs in the absence of raised intracranial pressure and visual dysfunction. A patient with secondary syphilis who presented with these features is described. The need to recognize the spectrum of ocular and optic nerve involvement in secondary syphilis is emphasized.
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Toshniwal P, Yadava R, Goldbarg H. Presentation of pinealoblastoma with ocular dipping and deafness. J Clin Neuroophthalmol 1986; 6:128-36. [PMID: 2942571] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Ocular dipping and deafness as presenting manifestations in a patient with pinealoblastoma are highly unusual. Presence of a discrete lesion allows us to postulate a mechanism to explain ocular dipping in light of the present understanding of vertical eye movement control. A mechanism for deafness, probably a false localizing sign of raised intracranial pressure, is proposed also.
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Abstract
This report describes a patient with cluster headache who developed anterior ischaemic optic neuropathy during an attack of headache, an association not previously described. A possible pathophysiologic mechanism based upon the understanding of optic disc physiology and ocular vascular pathology in headache syndromes is proposed.
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