1
|
Rwandamuriye FX, Vitali B, Schreurs J, Wang T, Barrick E, Iyer KS, Lesterhuis WJ, Zemek RM, Wylie B. Protocol for delivery of intraoperative immunotherapy to mice by surgical debulking of subcutaneous tumors. STAR Protoc 2024; 5:102948. [PMID: 38642337 PMCID: PMC11050725 DOI: 10.1016/j.xpro.2024.102948] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2023] [Revised: 01/22/2024] [Accepted: 02/23/2024] [Indexed: 04/22/2024] Open
Abstract
Pre-clinical studies developing novel therapies to prevent cancer recurrence require appropriate surgical models. Here, we present a protocol for surgical debulking of subcutaneous tumors in mice, which allows for intraoperative application of immunotherapy-loaded biomaterials. We describe steps for inoculating tumor cells, anesthetizing mice, and performing surgery. We then detail procedures for applying biomaterial, bandaging mice, and data collection and analysis. The optimized bandaging regimen resolves the issue of wound dehiscence after surgery, for C57BL/6 mice, which interfere with surgical sites. For complete details on the use and execution of this protocol, please refer to Rwandamuriye et al.1.
Collapse
Affiliation(s)
| | - Breana Vitali
- Telethon Kids Institute, University of Western Australia, Nedlands, WA 6009, Australia
| | - Juliët Schreurs
- Telethon Kids Institute, University of Western Australia, Nedlands, WA 6009, Australia
| | - Tao Wang
- Telethon Kids Institute, University of Western Australia, Nedlands, WA 6009, Australia
| | - Emily Barrick
- Harry Perkins Institute of Medical Research, Nedlands, WA 6009, Australia
| | | | | | - Rachael M Zemek
- Telethon Kids Institute, University of Western Australia, Nedlands, WA 6009, Australia.
| | - Ben Wylie
- Telethon Kids Institute, University of Western Australia, Nedlands, WA 6009, Australia.
| |
Collapse
|
2
|
Rwandamuriye FX, Evans CW, Wylie B, Norret M, Vitali B, Ho D, Nguyen D, Roper EA, Wang T, Hepburn MS, Sanderson RW, Pfirrmann M, Fear VS, Forbes CA, Wyatt K, Ryan AL, Johns TG, Phillips MB, Hodder R, Leslie C, Kennedy BF, Zemek RM, Iyer KS, Lesterhuis WJ. A surgically optimized intraoperative poly(I:C)-releasing hydrogel prevents cancer recurrence. Cell Rep Med 2023; 4:101113. [PMID: 37467718 PMCID: PMC10394259 DOI: 10.1016/j.xcrm.2023.101113] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Revised: 05/10/2023] [Accepted: 06/18/2023] [Indexed: 07/21/2023]
Abstract
Recurrences frequently occur following surgical removal of primary tumors. In many cancers, adjuvant therapies have limited efficacy. Surgery provides access to the tumor microenvironment, creating an opportunity for local therapy, in particular immunotherapy, which can induce local and systemic anti-cancer effects. Here, we develop a surgically optimized biodegradable hyaluronic acid-based hydrogel for sustained intraoperative delivery of Toll-like receptor 3 agonist poly(I:C) and demonstrate that it significantly reduces tumor recurrence after surgery in multiple mouse models. Mechanistically, poly(I:C) induces a transient interferon alpha (IFNα) response, reshaping the tumor/wound microenvironment by attracting inflammatory monocytes and depleting regulatory T cells. We demonstrate that a pre-existing IFN signature predicts response to the poly(I:C) hydrogel, which sensitizes tumors to immune checkpoint therapy. The safety, immunogenicity, and surgical feasibility are confirmed in a veterinary trial in canine soft tissue tumors. The surgically optimized poly(I:C)-loaded hydrogel provides a safe and effective approach to prevent cancer recurrence.
Collapse
Affiliation(s)
| | - Cameron W Evans
- School of Molecular Sciences, The University of Western Australia, Crawley, WA, Australia
| | - Ben Wylie
- Telethon Kids Institute, The University of Western Australia, Nedlands, WA, Australia
| | - Marck Norret
- School of Molecular Sciences, The University of Western Australia, Crawley, WA, Australia
| | - Breana Vitali
- Telethon Kids Institute, The University of Western Australia, Nedlands, WA, Australia
| | - Diwei Ho
- School of Molecular Sciences, The University of Western Australia, Crawley, WA, Australia
| | - Dat Nguyen
- Telethon Kids Institute, The University of Western Australia, Nedlands, WA, Australia
| | - Ellise A Roper
- Telethon Kids Institute, The University of Western Australia, Nedlands, WA, Australia
| | - Tao Wang
- Telethon Kids Institute, The University of Western Australia, Nedlands, WA, Australia
| | - Matt S Hepburn
- BRITElab, Harry Perkins Institute of Medical Research, QEII Medical Centre, Nedlands, WA, Australia; Centre for Medical Research, The University of Western Australia, Crawley, WA, Australia; Department of Electrical, Electronic and Computer Engineering, School of Engineering, The University of Western Australia, Crawley, WA, Australia
| | - Rowan W Sanderson
- BRITElab, Harry Perkins Institute of Medical Research, QEII Medical Centre, Nedlands, WA, Australia; Centre for Medical Research, The University of Western Australia, Crawley, WA, Australia; Department of Electrical, Electronic and Computer Engineering, School of Engineering, The University of Western Australia, Crawley, WA, Australia
| | - Maren Pfirrmann
- Telethon Kids Institute, The University of Western Australia, Nedlands, WA, Australia; Department of Medical BioSciences, Radboud University Medical Centre, Nijmegen, the Netherlands
| | - Vanessa S Fear
- Telethon Kids Institute, The University of Western Australia, Nedlands, WA, Australia
| | - Catherine A Forbes
- Telethon Kids Institute, The University of Western Australia, Nedlands, WA, Australia
| | - Ken Wyatt
- Perth Veterinary Specialists, Osborne Park, WA, Australia; Murdoch Veterinary School, Murdoch University, Murdoch, WA, Australia
| | - Anne L Ryan
- Telethon Kids Institute, The University of Western Australia, Nedlands, WA, Australia; Department of Oncology, Hematology and Tissue and Cellular Therapies, Perth Children's Hospital, Perth, WA, Australia
| | - Terrance G Johns
- Telethon Kids Institute, The University of Western Australia, Nedlands, WA, Australia
| | - Marianne B Phillips
- Telethon Kids Institute, The University of Western Australia, Nedlands, WA, Australia; Department of Oncology, Hematology and Tissue and Cellular Therapies, Perth Children's Hospital, Perth, WA, Australia
| | - Rupert Hodder
- Department of Surgery, Sir Charles Gairdner Hospital, Nedlands, WA, Australia
| | - Connull Leslie
- Department of Anatomical Pathology, PathWest Laboratory Medicine, QEII Medical Centre, Nedlands, WA, Australia
| | - Brendan F Kennedy
- BRITElab, Harry Perkins Institute of Medical Research, QEII Medical Centre, Nedlands, WA, Australia; Centre for Medical Research, The University of Western Australia, Crawley, WA, Australia; Department of Electrical, Electronic and Computer Engineering, School of Engineering, The University of Western Australia, Crawley, WA, Australia
| | - Rachael M Zemek
- Telethon Kids Institute, The University of Western Australia, Nedlands, WA, Australia
| | | | | |
Collapse
|
3
|
Zemek RM, Chin WL, Fear VS, Wylie B, Casey TH, Forbes C, Tilsed CM, Boon L, Guo BB, Bosco A, Forrest ARR, Millward MJ, Nowak AK, Lake RA, Lassmann T, Joost Lesterhuis W. Temporally restricted activation of IFNβ signaling underlies response to immune checkpoint therapy in mice. Nat Commun 2022; 13:4895. [PMID: 35986006 PMCID: PMC9390963 DOI: 10.1038/s41467-022-32567-8] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2021] [Accepted: 08/06/2022] [Indexed: 02/08/2023] Open
Abstract
The biological determinants of the response to immune checkpoint blockade (ICB) in cancer remain incompletely understood. Little is known about dynamic biological events that underpin therapeutic efficacy due to the inability to frequently sample tumours in patients. Here, we map the transcriptional profiles of 144 responding and non-responding tumours within two mouse models at four time points during ICB. We find that responding tumours display on/fast-off kinetics of type-I-interferon (IFN) signaling. Phenocopying of this kinetics using time-dependent sequential dosing of recombinant IFNs and neutralizing antibodies markedly improves ICB efficacy, but only when IFNβ is targeted, not IFNα. We identify Ly6C+/CD11b+ inflammatory monocytes as the primary source of IFNβ and find that active type-I-IFN signaling in tumour-infiltrating inflammatory monocytes is associated with T cell expansion in patients treated with ICB. Together, our results suggest that on/fast-off modulation of IFNβ signaling is critical to the therapeutic response to ICB, which can be exploited to drive clinical outcomes towards response. Immune checkpoint blockade (ICB) is partially successful as a cancer therapy. Here using mouse models, the authors transcriptionally monitor responding and non-responding tumours showing that responding tumours were associated with transient IFN-β signalling which could promote the anti-tumour response.
Collapse
|
4
|
Wylie B, Ong F, Belhoul-Fakir H, Priebatsch K, Bogdawa H, Stirnweiss A, Watt P, Cunningham P, Stone SR, Waithman J. Targeting Cross-Presentation as a Route to Improve the Efficiency of Peptide-Based Cancer Vaccines. Cancers (Basel) 2021; 13:6189. [PMID: 34944809 PMCID: PMC8699136 DOI: 10.3390/cancers13246189] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2021] [Accepted: 12/06/2021] [Indexed: 11/17/2022] Open
Abstract
Cross-presenting dendritic cells (DC) offer an attractive target for vaccination due to their unique ability to process exogenous antigens for presentation on MHC class I molecules. Recent reports have established that these DC express unique surface receptors and play a critical role in the initiation of anti-tumor immunity, opening the way for the development of vaccination strategies specifically targeting these cells. This study investigated whether targeting cross-presenting DC by two complementary mechanisms could improve vaccine effectiveness, in both a viral setting and in a murine melanoma model. Our novel vaccine construct contained the XCL1 ligand, to target uptake to XCR1+ cross-presenting DC, and a cell penetrating peptide (CPP) with endosomal escape properties, to enhance antigen delivery into the cross-presentation pathway. Using a prime-boost regimen, we demonstrated robust expansion of antigen-specific T cells following vaccination with our CPP-linked peptide vaccine and protective immunity against HSV-1 skin infection, where vaccine epitopes were natively expressed by the virus. Additionally, our novel vaccination strategy slowed tumor outgrowth in a B16 murine melanoma model, compared to adjuvant only controls, suggesting antigen-specific anti-tumor immunity was generated following vaccination. These findings suggest that novel strategies to target the antigen cross-presentation pathway in DC may be beneficial for the generation of anti-tumor immunity.
Collapse
Affiliation(s)
- Ben Wylie
- Telethon Kids Institute, The University of Western Australia, Nedlands, WA 6009, Australia;
| | - Ferrer Ong
- PYC Therapeutics, Harry Perkins Institute, QEII Medical Centre, Nedlands, WA 6009, Australia; (F.O.); (A.S.); (P.C.)
| | - Hanane Belhoul-Fakir
- School of Public Health, Faculty of Health Sciences, Curtin University, Bentley, WA 6102, Australia;
| | | | | | - Anja Stirnweiss
- PYC Therapeutics, Harry Perkins Institute, QEII Medical Centre, Nedlands, WA 6009, Australia; (F.O.); (A.S.); (P.C.)
| | - Paul Watt
- Avicena, West Perth, WA 6005, Australia;
| | - Paula Cunningham
- PYC Therapeutics, Harry Perkins Institute, QEII Medical Centre, Nedlands, WA 6009, Australia; (F.O.); (A.S.); (P.C.)
| | - Shane R. Stone
- School of Agriculture and the Environment, University of Western Australia, Nedlands, WA 6009, Australia
| | - Jason Waithman
- Telethon Kids Institute, The University of Western Australia, Nedlands, WA 6009, Australia;
| |
Collapse
|
5
|
Audsley KM, Wagner T, Ta C, Newnes HV, Buzzai AC, Barnes SA, Wylie B, Armitage J, Kaisho T, Bosco A, McDonnell A, Cruickshank M, Fear VS, Foley B, Waithman J. IFNβ Is a Potent Adjuvant for Cancer Vaccination Strategies. Front Immunol 2021; 12:735133. [PMID: 34552594 PMCID: PMC8450325 DOI: 10.3389/fimmu.2021.735133] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2021] [Accepted: 08/19/2021] [Indexed: 12/30/2022] Open
Abstract
Cancer vaccination drives the generation of anti-tumor T cell immunity and can be enhanced by the inclusion of effective immune adjuvants such as type I interferons (IFNs). Whilst type I IFNs have been shown to promote cross-priming of T cells, the role of individual subtypes remains unclear. Here we systematically compared the capacity of distinct type I IFN subtypes to enhance T cell responses to a whole-cell vaccination strategy in a pre-clinical murine model. We show that vaccination in combination with IFNβ induces significantly greater expansion of tumor-specific CD8+ T cells than the other type I IFN subtypes tested. Optimal expansion was dependent on the presence of XCR1+ dendritic cells, CD4+ T cells, and CD40/CD40L signaling. Therapeutically, vaccination with IFNβ delayed tumor progression when compared to vaccination without IFN. When vaccinated in combination with anti-PD-L1 checkpoint blockade therapy (CPB), the inclusion of IFNβ associated with more mice experiencing complete regression and a trend in increased overall survival. This work demonstrates the potent adjuvant activity of IFNβ, highlighting its potential to enhance cancer vaccination strategies alone and in combination with CPB.
Collapse
MESH Headings
- Adjuvants, Immunologic/pharmacology
- Animals
- B7-H1 Antigen/antagonists & inhibitors
- B7-H1 Antigen/metabolism
- CD8-Positive T-Lymphocytes/drug effects
- CD8-Positive T-Lymphocytes/immunology
- CD8-Positive T-Lymphocytes/metabolism
- Cancer Vaccines/pharmacology
- Cell Line, Tumor
- Cell Proliferation/drug effects
- Female
- Immune Checkpoint Inhibitors/pharmacology
- Interferon-beta/genetics
- Interferon-beta/metabolism
- Interferon-beta/pharmacology
- Lymphocyte Activation/drug effects
- Lymphocytes, Tumor-Infiltrating/drug effects
- Lymphocytes, Tumor-Infiltrating/immunology
- Lymphocytes, Tumor-Infiltrating/metabolism
- Melanoma, Experimental/immunology
- Melanoma, Experimental/metabolism
- Melanoma, Experimental/pathology
- Melanoma, Experimental/therapy
- Mice, Inbred C57BL
- Mice, Transgenic
- Skin Neoplasms/immunology
- Skin Neoplasms/metabolism
- Skin Neoplasms/pathology
- Skin Neoplasms/therapy
- Vaccination
- Mice
Collapse
Affiliation(s)
- Katherine M. Audsley
- Telethon Kids Institute, The University of Western Australia, Nedlands, WA, Australia
| | - Teagan Wagner
- Telethon Kids Institute, The University of Western Australia, Nedlands, WA, Australia
- Department of Microbiology and Immunology, The University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, VIC, Australia
| | - Clara Ta
- Telethon Kids Institute, The University of Western Australia, Nedlands, WA, Australia
| | - Hannah V. Newnes
- Telethon Kids Institute, The University of Western Australia, Nedlands, WA, Australia
| | - Anthony C. Buzzai
- Telethon Kids Institute, The University of Western Australia, Nedlands, WA, Australia
- Department of Experimental Dermatology, University of Magdeburg, Magdeburg, Germany
| | - Samantha A. Barnes
- Telethon Kids Institute, The University of Western Australia, Nedlands, WA, Australia
| | - Ben Wylie
- Telethon Kids Institute, The University of Western Australia, Nedlands, WA, Australia
| | - Jesse Armitage
- Telethon Kids Institute, The University of Western Australia, Nedlands, WA, Australia
| | - Tsuneyasu Kaisho
- Department of Immunology, Institute of Advanced Medicine, Wakayama Medical University, Wakayama, Japan
| | - Anthony Bosco
- Telethon Kids Institute, The University of Western Australia, Nedlands, WA, Australia
| | - Alison McDonnell
- Telethon Kids Institute, The University of Western Australia, Nedlands, WA, Australia
| | - Mark Cruickshank
- School of Biomedical Sciences, The University of Western Australia, Nedlands, WA, Australia
| | - Vanessa S. Fear
- Telethon Kids Institute, The University of Western Australia, Nedlands, WA, Australia
| | - Bree Foley
- Telethon Kids Institute, The University of Western Australia, Nedlands, WA, Australia
| | - Jason Waithman
- Telethon Kids Institute, The University of Western Australia, Nedlands, WA, Australia
| |
Collapse
|
6
|
McDonnell AM, Currie AJ, Brown M, Kania K, Wylie B, Cleaver A, Lake R, Robinson BWS. Tumor cells, rather than dendritic cells, deliver antigen to the lymph node for cross-presentation. Oncoimmunology 2021; 1:840-846. [PMID: 23162751 PMCID: PMC3489739 DOI: 10.4161/onci.20493] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [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] [Indexed: 01/08/2023] Open
Abstract
It is widely accepted that generation of tumor specific CD8+ T-cell responses occur via cross-priming; however the source of tumor antigen for this event is unknown. We examined the source and form of tumor antigen required for cross-presentation in the local lymph node (LN) using a syngeneic mouse tumor model expressing a marker antigen. We found that cross-presentation of this model tumor antigen in the LN is dependent on continuous traffic of antigen from the tumor site, but without any detectable migration of tumor resident dendritic cells (DCs). Instead, small numbers of tumor cells metastasize to local LNs where they are exposed to a localized CTL attack, resulting in delivery of tumor antigen into the cross-presentation pathway.
Collapse
Affiliation(s)
- Alison M McDonnell
- School of Medicine and Pharmacology; The University of Western Australia; Crawley, Australia ; National Centre for Asbestos Related Diseases; The University of Western Australia; Crawley, Australia
| | | | | | | | | | | | | | | |
Collapse
|
7
|
Foley B, Ta C, Barnes S, de Jong E, Nguyen M, Cheung LC, Buzzai A, Wagner T, Wylie B, Fernandez S, Cruickshank M, Endersby R, Kees U, Waithman J. Identifying the optimal donor for natural killer cell adoptive therapy to treat paediatric B- and T-cell acute lymphoblastic leukaemia. Clin Transl Immunology 2020; 9:e1151. [PMID: 32695339 PMCID: PMC7365579 DOI: 10.1002/cti2.1151] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2020] [Revised: 06/10/2020] [Accepted: 06/10/2020] [Indexed: 12/22/2022] Open
Abstract
Objectives Natural killer (NK) cells are an attractive source of cells for an ‘off the shelf’ cellular therapy because of their innate capacity to target malignant cells, and ability to be transferred between donors and patients. However, since not all NK cells are equally effective at targeting cancer, selecting the right donor for cellular therapy is critical for the success of the treatment. Recently, cellular therapies utilising NK cells from cytomegalovirus (CMV)‐seropositive donors have been explored. However, whether these NK cells are the best source to treat paediatric acute lymphoblastic leukaemia (ALL) remains unclear. Methods Using a panel of patient‐derived paediatric B‐ and T‐ALL, we assessed the ability of NK cells from 49 healthy donors to mount an effective functional response against these two major subtypes of ALL. Results From this cohort, we have identified a pool of donors with superior activity against multiple ALL cells. While these donors were more likely to be CMV+, we identified multiple CMVneg donors within this group. Furthermore, NK cells from these donors recognised B‐ and T‐ALL through different activating receptors. Dividing functional NK cells into 29 unique subsets, we observed that within each individual the same NK cell subsets dominated across all ALL cells. Intriguingly, this occurred despite the ALL cells in our panel expressing different combinations of NK cell ligands. Finally, we can demonstrate that cellular therapy products derived from these superior donors significantly delayed leukaemia progression in preclinical models of ALL. Conclusions We have identified a pool of superior donors that are effective against a range of ALL cells, representing a potential pool of donors that can be used as an adoptive NK cell therapy to treat paediatric ALL.
Collapse
Affiliation(s)
- Bree Foley
- Telethon Kids Institute University of Western Australia Nedlands Australia
| | - Clara Ta
- Telethon Kids Institute University of Western Australia Nedlands Australia
| | - Samantha Barnes
- Telethon Kids Institute University of Western Australia Nedlands Australia
| | - Emma de Jong
- Telethon Kids Institute University of Western Australia Nedlands Australia
| | - Michelle Nguyen
- Telethon Kids Institute University of Western Australia Nedlands Australia.,School of Biomedical Sciences University of Western Australia Nedlands Australia
| | - Laurence C Cheung
- Telethon Kids Institute University of Western Australia Nedlands Australia.,School of Pharmacy and Biomedical Sciences Curtin University Perth Australia
| | - Anthony Buzzai
- Telethon Kids Institute University of Western Australia Nedlands Australia
| | - Teagan Wagner
- Telethon Kids Institute University of Western Australia Nedlands Australia
| | - Ben Wylie
- Telethon Kids Institute University of Western Australia Nedlands Australia
| | - Sonia Fernandez
- School of Biomedical Sciences University of Western Australia Nedlands Australia
| | - Mark Cruickshank
- School of Biomedical Sciences University of Western Australia Nedlands Australia
| | - Raelene Endersby
- Telethon Kids Institute University of Western Australia Nedlands Australia
| | - Ursula Kees
- Telethon Kids Institute University of Western Australia Nedlands Australia
| | - Jason Waithman
- Telethon Kids Institute University of Western Australia Nedlands Australia
| |
Collapse
|
8
|
Chee J, Wilson C, Buzzai A, Wylie B, Forbes CA, Booth M, Principe N, Foley B, Cruickshank MN, Waithman J. Impaired T cell proliferation by ex vivo BET-inhibition impedes adoptive immunotherapy in a murine melanoma model. Epigenetics 2020; 15:134-144. [PMID: 31423932 PMCID: PMC6961692 DOI: 10.1080/15592294.2019.1656156] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Revised: 07/25/2019] [Accepted: 08/08/2019] [Indexed: 01/26/2023] Open
Abstract
Activation of naïve CD8+ T cells stimulates proliferation and differentiation into cytotoxic T-lymphocytes (CTLs). Adoptive T Cell Therapy (ACT) involves multiple rounds of ex vivo activation to generate enough CTLs for reinfusion into patients, but this drives differentiation into terminal effector T cells. Less differentiated CTL populations, such as stem cell memory T cells, are more ideal candidates for ACT because of increased self-renewal and persistent properties. Ex vivo targeting of T cell differentiation with epigenetic modifiers is a potential strategy to improve cytotoxic T-lymphocyte (CTL) generation for ACT. We established a pipeline to assess the effects of epigenetic modifiers on CD8+ T cell proliferation, differentiation, and efficacy in a preclinical melanoma model. Single treatment with epigenetic modifiers inhibited T cell proliferation in vitro, producing CD44hiCD62Lhi effector-like T cells rather than a stem cell memory T cell phenotype. Most epigenetic modifying agents had no significant effect on ACT efficacy with the notable exception of the bromodomain and extraterminal (BET)-inhibitor JQ1 which was associated with a decrease in efficacy compared to unmodified T cells. These findings reveal the complexity of epigenetic targeting of T cell differentiation, highlighting the need to precisely define the epigenetic targeting strategies to improve CTL generation for ACT.
Collapse
Affiliation(s)
- Jonathan Chee
- Telethon Kids Institute, Centre for Child Health Research, The University of Western Australia, West Perth, WA, Australia
- National Centre for Asbestos Related Diseases, School of Biomedical Sciences, University of Western Australia, QEII Medical Centre, Nedlands, WA, Australia
| | - Chelsea Wilson
- Telethon Kids Institute, Centre for Child Health Research, The University of Western Australia, West Perth, WA, Australia
| | - Anthony Buzzai
- Telethon Kids Institute, Centre for Child Health Research, The University of Western Australia, West Perth, WA, Australia
| | - Ben Wylie
- Telethon Kids Institute, Centre for Child Health Research, The University of Western Australia, West Perth, WA, Australia
| | - Catherine A Forbes
- National Centre for Asbestos Related Diseases, School of Biomedical Sciences, University of Western Australia, QEII Medical Centre, Nedlands, WA, Australia
| | - Mitchell Booth
- Telethon Kids Institute, Centre for Child Health Research, The University of Western Australia, West Perth, WA, Australia
| | - Nicola Principe
- National Centre for Asbestos Related Diseases, School of Biomedical Sciences, University of Western Australia, QEII Medical Centre, Nedlands, WA, Australia
| | - Bree Foley
- Telethon Kids Institute, Centre for Child Health Research, The University of Western Australia, West Perth, WA, Australia
| | - Mark N Cruickshank
- Telethon Kids Institute, Centre for Child Health Research, The University of Western Australia, West Perth, WA, Australia
| | - Jason Waithman
- Telethon Kids Institute, Centre for Child Health Research, The University of Western Australia, West Perth, WA, Australia
| |
Collapse
|
9
|
Wylie B, Chee J, Forbes CA, Booth M, Stone SR, Buzzai A, Abad A, Foley B, Cruickshank MN, Waithman J. Acquired resistance during adoptive cell therapy by transcriptional silencing of immunogenic antigens. Oncoimmunology 2019; 8:1609874. [PMID: 31413920 PMCID: PMC6682399 DOI: 10.1080/2162402x.2019.1609874] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [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: 11/08/2018] [Revised: 04/15/2019] [Accepted: 04/16/2019] [Indexed: 12/23/2022] Open
Abstract
Immunotherapies such as adoptive cell therapy (ACT) are promising treatments for solid cancers. However, relapsing disease remains a problem and the molecular mechanisms underlying resistance are poorly defined. We postulated that the deregulated epigenetic landscape in cancer cells could underpin the acquisition of resistance to immunotherapy. To address this question, two preclinical models of ACT were employed to study transcriptional and epigenetic regulatory processes within ACT-treated cancer cells. In these models ACT consistently causes robust tumor regression, but resistance develops and tumors relapse. We identified down-regulated expression of immunogenic antigens at the mRNA level correlated with escape from immune control. To determine whether this down-regulation was under epigenetic control, we treated escaped tumor cells with DNA demethylating agents, azacytidine (AZA) and decitabine (DEC). AZA or DEC treatment restored antigen expression in a proportion of the tumor population. To explore the importance of other epigenetic modifications we isolated tumor cells refractory to DNA demethylation and screened clones against a panel of 19 different epigenetic modifying agents (EMAs). The library of EMAs included inhibitors of a range of chromosomal and transcription regulatory protein complexes, however, when tested as single agents none restored further antigen expression. These findings suggest that tumor cells employ multiple epigenetic and genetic mechanisms to evade immune control, and a combinatorial approach employing several EMAs targeting transcription and genome stability may be required to overcome tumor resistance to immunotherapy.
Collapse
Affiliation(s)
- Ben Wylie
- Phylogica, Harry Perkins Institute for Medical Research, QEII Medical Centre, Nedlands, Australia
| | - Jonathan Chee
- National Centre for Asbestos Related Diseases, School of Biomedical Sciences, University of Western Australia, QEII Medical Centre, Nedlands, Australia
| | - Catherine A Forbes
- Telethon Kids Institute, University of Western Australia, Northern Entrance, Perth Children's Hospital, Nedlands, Australia
| | - Mitchell Booth
- Telethon Kids Institute, University of Western Australia, Northern Entrance, Perth Children's Hospital, Nedlands, Australia
| | - Shane R Stone
- Phylogica, Harry Perkins Institute for Medical Research, QEII Medical Centre, Nedlands, Australia
| | - Anthony Buzzai
- Telethon Kids Institute, University of Western Australia, Northern Entrance, Perth Children's Hospital, Nedlands, Australia
| | - Ana Abad
- Telethon Kids Institute, University of Western Australia, Northern Entrance, Perth Children's Hospital, Nedlands, Australia
| | - Bree Foley
- Telethon Kids Institute, University of Western Australia, Northern Entrance, Perth Children's Hospital, Nedlands, Australia
| | - Mark N Cruickshank
- Telethon Kids Institute, University of Western Australia, Northern Entrance, Perth Children's Hospital, Nedlands, Australia
| | - Jason Waithman
- Telethon Kids Institute, University of Western Australia, Northern Entrance, Perth Children's Hospital, Nedlands, Australia
| |
Collapse
|
10
|
Wylie B, Macri C, Mintern JD, Waithman J. Dendritic Cells and Cancer: From Biology to Therapeutic Intervention. Cancers (Basel) 2019; 11:E521. [PMID: 30979057 PMCID: PMC6521027 DOI: 10.3390/cancers11040521] [Citation(s) in RCA: 92] [Impact Index Per Article: 18.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2019] [Revised: 04/05/2019] [Accepted: 04/07/2019] [Indexed: 12/16/2022] Open
Abstract
Inducing effective anti-tumor immunity has become a major therapeutic strategy against cancer. Dendritic cells (DC) are a heterogenous population of antigen presenting cells that infiltrate tumors. While DC play a critical role in the priming and maintenance of local immunity, their functions are often diminished, or suppressed, by factors encountered in the tumor microenvironment. Furthermore, DC populations with immunosuppressive activities are also recruited to tumors, limiting T cell infiltration and promoting tumor growth. Anti-cancer therapies can impact the function of tumor-associated DC and/or alter their phenotype. Therefore, the design of effective anti-cancer therapies for clinical translation should consider how best to boost tumor-associated DC function to drive anti-tumor immunity. In this review, we discuss the different subsets of tumor-infiltrating DC and their role in anti-tumor immunity. Moreover, we describe strategies to enhance DC function within tumors and harness these cells for effective tumor immunotherapy.
Collapse
Affiliation(s)
- Ben Wylie
- Phylogica, Harry Perkins Institute, QEII Medical Centre, Nedlands, WA 6009, Australia.
| | - Christophe Macri
- Department of Biochemistry and Molecular Biology, The University of Melbourne, Bio21, Molecular Science and Biotechnology Institute, Parkville, VIC 3010, Australia.
| | - Justine D Mintern
- Department of Biochemistry and Molecular Biology, The University of Melbourne, Bio21, Molecular Science and Biotechnology Institute, Parkville, VIC 3010, Australia.
| | - Jason Waithman
- Telethon Kids Institute, University of Western Australia, Northern Entrance, Perth Children's Hospital, Nedlands, WA 6009, Australia.
| |
Collapse
|
11
|
Wylie B. Severe maternal anaemia, a missed opportunity for prevention. BJOG 2019; 126:744. [PMID: 30648811 DOI: 10.1111/1471-0528.15613] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Affiliation(s)
- B Wylie
- Division of Maternal-Fetal Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA
| |
Collapse
|
12
|
Wylie B, Read J, Buzzai AC, Wagner T, Troy N, Syn G, Stone SR, Foley B, Bosco A, Cruickshank MN, Waithman J. CD8 +XCR1 neg Dendritic Cells Express High Levels of Toll-Like Receptor 5 and a Unique Complement of Endocytic Receptors. Front Immunol 2019; 9:2990. [PMID: 30700986 PMCID: PMC6343586 DOI: 10.3389/fimmu.2018.02990] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2018] [Accepted: 12/04/2018] [Indexed: 01/21/2023] Open
Abstract
Conventional dendritic cells (cDC) resident in the lymphoid organs of mice have been classically divided into CD8+ and CD8neg subsets. It is well-established that CD8+ dendritic cells (DCs) and their migratory counterparts in the periphery comprise the cross-presenting cDC1 subset. In contrast, CD8neg DCs are grouped together in the heterogeneous cDC2 subset. CD8neg DCs are relatively poor cross-presenters and drive more prominent CD4+ T cell responses against exogenous antigens. The discovery of the X-C motif chemokine receptor 1 (XCR1) as a specific marker of cross-presenting DCs, has led to the identification of a divergent subset of CD8+ DCs that lacks the ability to cross-present. Here, we report that these poorly characterized CD8+XCR1neg DCs have a gene expression profile that is consistent with both plasmacytoid DCs (pDCs) and cDC2. Our data demonstrate that CD8+XCR1neg DCs possess a unique pattern of endocytic receptors and a restricted toll-like receptor (TLR) profile that is particularly enriched for TLR5, giving them a unique position within the DC immunosurveillance network.
Collapse
Affiliation(s)
- Ben Wylie
- Telethon Kids Institute, University of Western Australia, Perth, WA, Australia
| | - James Read
- Telethon Kids Institute, University of Western Australia, Perth, WA, Australia
| | - Anthony C Buzzai
- Telethon Kids Institute, University of Western Australia, Perth, WA, Australia
| | - Teagan Wagner
- Telethon Kids Institute, University of Western Australia, Perth, WA, Australia
| | - Niamh Troy
- Telethon Kids Institute, University of Western Australia, Perth, WA, Australia
| | - Genevieve Syn
- Telethon Kids Institute, University of Western Australia, Perth, WA, Australia
| | - Shane R Stone
- Telethon Kids Institute, University of Western Australia, Perth, WA, Australia
| | - Bree Foley
- Telethon Kids Institute, University of Western Australia, Perth, WA, Australia
| | - Anthony Bosco
- Telethon Kids Institute, University of Western Australia, Perth, WA, Australia
| | - Mark N Cruickshank
- Telethon Kids Institute, University of Western Australia, Perth, WA, Australia
| | - Jason Waithman
- Telethon Kids Institute, University of Western Australia, Perth, WA, Australia
| |
Collapse
|
13
|
Waldrop MP, Holloway JM, Smith DB, Goldhaber MB, Drenovsky RE, Scow KM, Dick R, Howard D, Wylie B, Grace JB. The interacting roles of climate, soils, and plant production on soil microbial communities at a continental scale. Ecology 2017; 98:1957-1967. [DOI: 10.1002/ecy.1883] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/29/2016] [Revised: 03/28/2017] [Accepted: 04/05/2017] [Indexed: 11/09/2022]
Affiliation(s)
- M. P. Waldrop
- U.S. Geological Survey Menlo Park California 94025 USA
| | | | - D. B. Smith
- U.S. Geological Survey Denver Colorado 80225 USA
| | | | - R. E. Drenovsky
- Department of Biology John Carroll University University Heights Ohio 44118 USA
| | - K. M. Scow
- Land, Air & Water Resources University of California – Davis Davis California 95616 USA
| | - R. Dick
- Environmental and Natural Resources Ohio State University Columbus Ohio 43210 USA
| | - D. Howard
- U.S. Geological Survey, EROS Data Center Sioux Falls South Dakota 57030 USA
| | - B. Wylie
- U.S. Geological Survey, EROS Data Center Sioux Falls South Dakota 57030 USA
| | - J. B. Grace
- U.S. Geological Survey Lafayette Louisiana 70506 USA
| |
Collapse
|
14
|
Dickison P, Howard V, Wylie B, Smith SD. Localized axillary milia en plaque: a rare cutaneous case presentation of systemic amyloidosis. Clin Exp Dermatol 2016; 41:764-7. [PMID: 27663153 DOI: 10.1111/ced.12914] [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] [Accepted: 04/27/2016] [Indexed: 11/28/2022]
Abstract
Systemic AL amyloidosis is known to be associated with plasma cell dyscrasias, including multiple myeloma. The cutaneous manifestations of systemic AL amyloidosis are varied, but typically include waxy plaques or subcutaneous nodules. We report a woman who presented with bilateral eruptions of hyperpigmented plaques in her axillae, which were diagnosed as milia en plaque. She had a history of multiple myeloma, for which she was under the care of a haematologist. This is the first documented case, to our knowledge, of an eruption in the axillae being milia en plaque.
Collapse
Affiliation(s)
- P Dickison
- Department of Dermatology, Royal North Shore Hospital, St Leonards, NSW, Australia.
| | - V Howard
- Department of Histopathology, Douglas Hanly Moir Pathology, North Ryde, NSW, Australia
| | - B Wylie
- Department of Haematology, Gosford Hospital, Gosford, NSW, Australia
| | - S D Smith
- Department of Dermatology, Royal North Shore Hospital, St Leonards, NSW, Australia.,Northern Clinical School, Sydney Medical School, University of Sydney, Sydney, NSW, Australia.,The Dermatology and Skin Cancer Centre, Gosford, NSW, Australia
| |
Collapse
|
15
|
Messerlian C, Wylie B, Williams P, Ford J, Keller M, Calafat A, Hauser R. Urinary phthalate metabolite concentrations were associated with pregnancy loss among women conceiving with medically assisted reproduction. Fertil Steril 2015. [DOI: 10.1016/j.fertnstert.2015.07.115] [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]
|
16
|
Wylie B, Seppanen E, Xiao K, Zemek R, Zanker D, Prato S, Foley B, Hart PH, Kroczek RA, Chen W, Waithman J. Cross-presentation of cutaneous melanoma antigen by migratory XCR1 +CD103 - and XCR1 +CD103 + dendritic cells. Oncoimmunology 2015; 4:e1019198. [PMID: 26405572 DOI: 10.1080/2162402x.2015.1019198] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [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: 01/20/2015] [Revised: 02/05/2015] [Accepted: 02/07/2015] [Indexed: 10/23/2022] Open
Abstract
The question of which dendritic cells (DCs) cross-present peripheral tumor antigens remains unanswered. We assessed the ability of multiple skin-derived and lymphoid resident DCs to perform this function in a novel orthotopic murine melanoma model where tumor establishment and expansion is within the skin. Two migratory populations defined as CD103-XCR1+ and CD103+XCR1+ efficiently cross-presented melanoma-derived antigen, with the CD103-XCR1+ DCs surprisingly dominating this process. These results are critical for understanding how antitumor CD8+ T cell immunity is coordinated to tumor antigens present within the skin.
Collapse
Affiliation(s)
- Ben Wylie
- Telethon Kids Institute; University of Western Australia ; Subiaco, Australia
| | - Elke Seppanen
- Telethon Kids Institute; University of Western Australia ; Subiaco, Australia
| | - Kun Xiao
- T cell Laboratory; School of Molecular Science; La Trobe University ; Bundoora, Victoria, Australia
| | - Rachael Zemek
- Telethon Kids Institute; University of Western Australia ; Subiaco, Australia
| | - Damien Zanker
- T cell Laboratory; School of Molecular Science; La Trobe University ; Bundoora, Victoria, Australia
| | - Sandro Prato
- CSL Limited; Bio21 Institute ; Parkville, Victoria, Australia
| | - Bree Foley
- Telethon Kids Institute; University of Western Australia ; Subiaco, Australia
| | - Prue H Hart
- Telethon Kids Institute; University of Western Australia ; Subiaco, Australia
| | | | - Weisan Chen
- T cell Laboratory; School of Molecular Science; La Trobe University ; Bundoora, Victoria, Australia
| | - Jason Waithman
- Telethon Kids Institute; University of Western Australia ; Subiaco, Australia
| |
Collapse
|
17
|
Fisher SA, Cleaver A, Lakhiani DD, Khong A, Connor T, Wylie B, Lesterhuis WJ, Robinson BWS, Lake RA. Neoadjuvant anti-tumor vaccination prior to surgery enhances survival. J Transl Med 2014; 12:245. [PMID: 25186961 PMCID: PMC4156969 DOI: 10.1186/s12967-014-0245-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [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: 03/13/2014] [Accepted: 08/26/2014] [Indexed: 02/06/2023] Open
Abstract
Background This study was conducted to determine if anti-tumor vaccination administered prior to partial debulking surgery could improve survival using a murine solid tumour model. Methods Tumor incidence and survival rates were compared in mice bearing subcutaneous AB1-HA mesothelioma tumors that received either sham surgery, debulking surgery or vaccination prior to debulking surgery. Additionally, mice were depleted of CD4 and/or CD8 T lymphocytes during vaccination to assess their involvement in vaccine induced anti-tumor immunity. Flow cytometry was performed to characterise changes in the proportion and activation status of immune cells associated with anti-tumor immunity. Results Neoadjuvant vaccination combined with debulking surgery resulted in decreased tumor burden, increased survival and generation of tumor-specific immunity compared to surgery alone. Depletion of CD8 T cells completely abrogated any vaccine induced anti-tumor immune response. Conversely, CD4 depletion enhanced CD8 T cell activation resulting in complete tumor regression in 70% of mice treated with combined surgery and vaccination therapy. Tumor free survival was associated with established immunological memory as defined by the induction of effector memory T cells and resistance to rechallenge with parental AB1 mesothelioma cells. Conclusions Neoadjuvant anti-cancer vaccination combined with partial debulking surgery induced CD8-dependent anti-tumor immunity that significantly delayed tumor outgrowth relative to surgery alone. Complete tumor eradication was observed when vaccination and surgery were performed in CD4 T cell depleted animals. This demonstrates that adjuvant immunotherapy can improve post-surgical survival following cancer debulking surgery and provides a scientific rational for clinical trials of such an approach.
Collapse
Affiliation(s)
- Scott A Fisher
- School of Medicine & Pharmacology, University of Western Australia, Perth, 4th Floor, G Block, Queen Elizabeth II Medical Centre, Perth 6009, WA, Australia.
| | | | | | | | | | | | | | | | | |
Collapse
|
18
|
Cleaver AL, Bhamidipaty K, Wylie B, Connor T, Robinson C, Robinson BW, Mutsaers SE, Lake RA. Long-term exposure of mesothelial cells to SV40 and asbestos leads to malignant transformation and chemotherapy resistance. Carcinogenesis 2013; 35:407-14. [DOI: 10.1093/carcin/bgt322] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
|
19
|
Waithman J, Zanker D, Xiao K, Oveissi S, Wylie B, Ng R, Tögel L, Chen W. Resident CD8(+) and migratory CD103(+) dendritic cells control CD8 T cell immunity during acute influenza infection. PLoS One 2013; 8:e66136. [PMID: 23750278 PMCID: PMC3672151 DOI: 10.1371/journal.pone.0066136] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [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: 01/29/2013] [Accepted: 05/01/2013] [Indexed: 02/06/2023] Open
Abstract
The identification of the specific DC subsets providing a critical role in presenting influenza antigens to naïve T cell precursors remains contentious and under considerable debate. Here we show that CD8(+) T lymphocyte (TCD8+) responses are severely hampered in C57BL/6 mice deficient in the transcription factor Batf3 after intranasal challenge with influenza A virus (IAV). This transcription factor is required for the development of lymph node resident CD8(+) and migratory CD103(+)CD11b(-) DCs and we found both of these subtypes could efficiently stimulate anti-IAV TCD8+. Using a similar ex vivo approach, many publications on this subject matter excluded a role for resident, non-migratory CD8(+) DC. We postulate the differences reported can partially be explained by how DC are phenotyped, namely the use of MHC class II to segregate subtypes. Our results show that resident CD8(+) DC upregulate this marker during IAV infection and we advise against its use when isolating DC subtypes.
Collapse
Affiliation(s)
- Jason Waithman
- Telethon Institute for Child Health Research and Centre for Child Health Research, University of Western Australia, Perth, Western Australia, Australia.
| | | | | | | | | | | | | | | |
Collapse
|
20
|
Ngonzi J, Hutchinson R, Walker I, Wikstrom E, Wylie B, Godfrey M, Bonet I, Ttendo S. O497 REDUCING MATERNAL MORTALITY THROUGH IMPROVEMENTS IN PERI-OPERATIVE OBSTETRIC CARE AT MBARARA REGIONAL REFERRAL HOSPITAL (MRRH), UGANDA. Int J Gynaecol Obstet 2012. [DOI: 10.1016/s0020-7292(12)60927-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
21
|
Chik W, Robinson D, Malchano Z, Barry M, Rothe C, Wylie B, Pouliopoulis J, Allison J, Saadat V, Ross D, Kovoor P, Thomas S, Thiagalingam A. First in Human Successful Re-isolation of Pulmonary Veins Utilising the Direct Endocardial Visualisation Ablation Catheter for Recurrent Symptomatic Atrial Fibrillation Following Pulmonary Vein Isolation. Heart Lung Circ 2011. [DOI: 10.1016/j.hlc.2011.05.237] [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]
|
22
|
Rollo CD, Kajiura LJ, Wylie B, D'Souza S. The growth hormone axis, feeding, and central allocative regulation: lessons from giant transgenic growth hormone mice. CAN J ZOOL 1999. [DOI: 10.1139/z99-162] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Lifetime consumption rates of male transgenic growth hormone (GH) mice and normal controls were measured on either a 38% protein diet (HP), the standard rodent diet (STD) (23.5% protein), or the standard diet supplemented with a free choice of sucrose (CARB). On STD, daily intake of normal mice increased little at sizes greater than 20 g, but larger transgenic mice ate progressively more. Both kinds of mice showed declining daily mass-specific consumption with increasing age. Transgenic mice consistently ate 13.3% less food than normal mice on a mass-specific basis across all ages. On the self-selective CARB diet, normal mice exhibited increasing age-specific daily consumption, whereas transgenic mice exhibited a trend towards age-related decline in mass-specific feeding that proved significant on the basis of body mass. Transgenic mice ingested more sucrose than standard chow and this did not vary with age. In contrast, normal mice ate less sucrose than chow and chose a declining proportion of sucrose with age. Transgenic and normal mice showed a unitary relationship of daily intake of HP in relation to body mass, resulting in constant mass-specific feeding across all ages. Transgenic GH animals, including livestock, show numerous defects that we have attributed to relative energetic stress associated with excessive allocation to lean growth. This is exacerbated by failure to offset increased demands of growth by increasing mass-specific feeding. Results presented here document altered feeding regulation in transgenic GH mice and suggest underlying mechanisms.
Collapse
|
23
|
Chen J, McGuinness PH, Koorey DJ, Rickard K, Wylie B, McCaughan GW. Hepatitis C virus genotypes in a cohort of Australian blood donors and haemophiliac and liver transplant patients. J Gastroenterol Hepatol 1997; 12:182-7. [PMID: 9083922 DOI: 10.1111/j.1440-1746.1997.tb00404.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
The aim of the present study was to characterize hepatitis C virus (HCV) genotypes using the INNO-LiPA HCV line probe assay and direct sequencing from three different HCV-RNA-positive (serum) groups: (i) blood donors (n = 59); (ii) haemophiliacs (n = 43); and (iii) patients undergoing liver transplantation (n = 26). Of 128 HCV-RNA-positive samples, 74 (58%) were genotype 1. Of these, 41 were genotype 1a, 32 were genotype 1b and one was genotype 1 indeterminate. Of the remaining 54 samples, seven (5%) were genotype 2a, two (2%) were genotype 2b, 26 (20%) were genotype 3a, three (2%) were genotype 4a, while 16 (12.5%) were of a mixed genotype. There was no significant difference between the three groups with regard to the prevalence of any specific genotype. However, in blood donors and haemophiliac patients there was a statistically significant difference in the occurrence of genotype 3a in patients with elevated alanine aminotransferase (ALT) levels (30.3%) compared with those patients with persistently normal ALT levels (5.6%; P = 0.004; chi 2). Genotype 3a was also uncommon in liver transplant patients (one of 14) with "sporadic' HCV infection. Genotype 4a was detected only in liver transplant patients. These patients had originated from Egypt (n = 1), Italy (n = 1) and Romania (n = 1).
Collapse
Affiliation(s)
- J Chen
- AW Morrow Gastroenterology and Liver Centre, Royal Prince Alfred Hospital/University of Sydney, New South Wales, Australia
| | | | | | | | | | | |
Collapse
|
24
|
Garsia RJ, Ross J, Shipway P, Wylie B. Managing HIV. Part 6: People living with HIV. 6.4 Medically acquired HIV infection. Med J Aust 1996; 165:36-8. [PMID: 8676777] [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: 02/01/2023]
Abstract
Often an underlying disorder (such as haemophilia) creates special management issues for people with medically acquired HIV. Although the risk of infection through donated biological materials is now slight, an unknown number of undiagnosed cases remain in the community.
Collapse
Affiliation(s)
- R J Garsia
- Royal Prince Alfred Hospital, Sydney, NSW
| | | | | | | |
Collapse
|
25
|
Abstract
The case histories aimed to describe the risk behaviours of a series of seven Australian women who acquired the human immunodeficiency virus (HIV) through heterosexual contact. Between 1985 and 1990 eight HIV antibody positive female donors were identified through routine HIV antibody screening at the NSW Red Cross Blood Transfusion Service. These donors were recalled and interviewed to assess risk factors for HIV and establish how and/or why the declaration form and the interview process prior to donation did not identify a risk factor. The most likely risk factor in seven cases was then assessed by the Blood Bank to be heterosexual transmission. Histories for three cases were based on the standard risk assessment interview at the Blood Bank and four case histories were based on additional interviews conducted independently from the Blood Bank with informed consent.
Collapse
Affiliation(s)
- M L McLaws
- School of Health Services Management, University of New South Wales, Sydney, Australia
| | | | | |
Collapse
|
26
|
Nusholtz GS, Wylie B, Glascoe LG. Cavitation/boundary effects in a simple head impact model. Aviat Space Environ Med 1995; 66:661-7. [PMID: 7575316] [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] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
An experimental and numerical analysis of the impact response of a simple model of the human head is presented. A water-filled 14-cm diameter cylinder was struck by a 10 kg free flying mass. Rigid-body acceleration-time-history and the pressure at the fluid-cylinder interface were monitored during the impact event. Comparisons between the experimental results and the results of a computational model were made. The computational model used is a two-dimensional finite difference code simulating the physical experiment. The code incorporates a thin layer of air and the potential for vaporization along the inside of the cylinder. The study indicates that during a severe impact to the human head, the stresses generated within the brain can result in cavitation on the far side of impact followed by a sudden cavity collapse which can be quite violent. The study identifies how a skull-brain interface and cavitation can potentially affect the internal pressure response of the brain when subjected to a sudden impact.
Collapse
Affiliation(s)
- G S Nusholtz
- Chrysler Motor Corporation, Auburn Hills, MI 48326-2757, USA
| | | | | |
Collapse
|
27
|
Abstract
The method for making non-parametric inferences about the probability distribution of the incubation period for AIDS from transfusion-related AIDS data is extended to include data on individuals who have tested positive for HIV but do not have AIDS at the time of analysis. The method is illustrated with data on individuals infected by transfusion in Australia. The shape of the incubation distribution, as represented by the truncated distribution function, can be estimated, but the additional data contribute very little to the estimation of this shape. With a general non-parametric form for the incubation distribution the additional data do not overcome the identifiability problem that exists for non-parametric estimation of this distribution from AIDS data alone. If quarterly rates for HIV testing are specified, the additional data make it possible to estimate the cumulative distribution function for the incubation period. This is also possible when a simple parametric form, with one or two unknown parameters, is used for the testing rates. However, the additional data do not allow effective estimation of the HIV testing rates. The estimated shape of the incubation distribution indicates a higher proportion of short incubation periods than an earlier estimate based on U.S. data. Estimates for the incubation distribution itself do not vary much over a plausible range of HIV testing rates.
Collapse
Affiliation(s)
- M Motika
- Department of Statistics, La Trobe University, Bundoora VIC, Australia
| | | | | | | | | |
Collapse
|
28
|
Abstract
From a registry of people with transfusion-acquired HIV infection, 25 recipients were identified for whom the dates of HIV infection in the 8 corresponding donors could be established. Longer times to AIDS and to death in recipients were independently associated (p < 0.01) with the receipt of blood from donors who developed AIDS more than 10 years after HIV infection, as well as with older age and fewer transfusions. Sex, zidovudine treatment, and severity of illness at transfusion were not significantly associated with survival.
Collapse
Affiliation(s)
- L J Ashton
- National Centre in HIV Epidemiology and Clinical Research, University of New South Wales, Sydney, Australia
| | | | | | | | | | | |
Collapse
|
29
|
Abstract
Monitoring the outdating of donated units is one way of assessing the efficiency of blood usage. Inventory management in public hospital blood banks in Sydney was reviewed with the aim of determining factors which lead to the outdating of donor blood. Factors which correlated significantly with increased outdating in hospitals included absence of an effective hospital transfusion committee; high ratio of average inventory: units transfused; fewer than three routine deliveries from the BTS per day; increased time taken for delivery of urgent products; CT values greater than 2:1, premature performance of the crossmatch and prolonged crossmatching holding time. Hospitals were informed of the initial audit results and were alerted to the factors contributing to excessive outdating. They received monthly feedback of individual outdating results compared with overall outdating. After 6 months there was a significant reduction in overall outdating from 5.0 to 0.9% (P < 0.05), which has been maintained for a further 12 months. Changes in inventory management associated with an improvement in overall outdating included: changes in crossmatching practice which increase the effective shelf-life of blood, knowledge of when blood was due to outdate and effective stock rotation.
Collapse
Affiliation(s)
- J Pink
- NSW Red Cross Blood Transfusion Service, Sydney, Australia
| | | | | |
Collapse
|
30
|
Wylie B. NHS reforms: stepping cautiously towards reform. Nurs Stand 1994; 8:22-3. [PMID: 8043372 DOI: 10.7748/ns.8.36.22.s30] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
|
31
|
Abstract
Autologous collections are strongly advocated by the New South Wales Red Cross Blood Transfusion Service (BTS) and have increased more than sevenfold since 1988. Directed donations, although not promoted, have also increased during this time. The prevalence of infectious disease markers (HIV, hepatitis C, hepatitis B and syphilis) in donations collected by the BTS from different donor groups including overall volunteer homologous, first-time volunteer homologous, autologous and directed were evaluated over a 42-month period. Donations from first-time volunteer homologous donors had the highest prevalence of hepatitis B and C. Autologous donations had a significantly higher prevalence of hepatitis B, hepatitis C and syphilis compared with overall volunteer homologous donations. The percentage of directed donations testing positive for either hepatitis B or C was higher than overall volunteer homologous donations, but not statistically significant. This study demonstrates that donations from first-time donors are the least safe, that the crossover of autologous blood into the volunteer homologous pool decreases the safety of that pool and suggests that directed donations may not be as safe as volunteer homologous donations and cannot be generally advocated at this time.
Collapse
Affiliation(s)
- J Pink
- New South Wales Red Cross Blood Transfusion Service, Sydney, Australia
| | | | | |
Collapse
|
32
|
Wylie B. Which methods of donor recruitment give the safest donors? Malays J Pathol 1993; 15:99-103. [PMID: 8065181] [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] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Thus, it can be seen that there are a number of ways by which donors can be recruited into the blood supply: voluntary non-remunerated random donors, paid random donors, directed donors, replacement donors and unused autologous units from autologous donors. It can be seen from the data and evidence discussed above, as designated by the World Health Organisation, voluntary non-remunerated donation is far and away the safest form of blood donation and strenuous efforts must be developed for a strong programme using a core with a high percentage of regular donors in order to maintain the highest possible quality of blood supply.
Collapse
Affiliation(s)
- B Wylie
- NSW Red Cross Blood Transfusion Service, Sydney, Australia
| |
Collapse
|
33
|
Affiliation(s)
- B Wylie
- New South Wales Red Cross Blood Transfusion Service
| |
Collapse
|
34
|
Abstract
With the aim of reducing the damage to platelets while effectively removing class I HLA antigens from their surfaces, we developed a new method using acidified chloroquine diphosphate. Platelets were treated with a 0.2 M solution of chloroquine diphosphate (pH 4.0). More than 90% of the platelets remained viable after treatment. While a marked reduction in reactions of acidified chloroquine-treated platelets with multispecific HLA antisera was noted in comparison with phosphate-buffered-saline-(PBS)-treated platelets, reactions with platelet-specific antibodies were preserved. This was demonstrated by immunofluorescence tests and solid-phase and monoclonal antibody immobilization of platelet antigen assays. Aggregation responses, though reduced in comparison with PBS-treated platelets, were still preserved after acidified chloroquine treatment. Ultrastructural analysis did not show any significant difference from PBS-treated platelets. We conclude that treatment of platelets with acidified chloroquine diphosphate is a simple and effective method for removing class I HLA antigens from their surfaces with minimal damage to their structure and function.
Collapse
Affiliation(s)
- A Srivastava
- Haematology Department, Westmead Hospital, Sydney, NSW, Australia
| | | | | | | | | | | | | |
Collapse
|
35
|
Abstract
OBJECTIVE To determine the rate of development of AIDS, and the demographic and clinical cofactors for development of AIDS in a group of 117 people with transfusion-acquired HIV infection, who were infected between 1980 and 1985 in New South Wales, Australia. RESULTS By December 1991, 67 (57%, 95% CI 48-66%) of the study subjects had developed AIDS. The estimated median time to development of AIDS was 7.2 years from the date of infection. There was no significant difference in median age at infection or sex between individuals who did and did not develop AIDS. The median time to development of AIDS was shorter in older individuals (median time to AIDS for age groups 13-39, 40-59 and > 59 was 7.8, 7.1 and 5.4 years, respectively; P = 0.20). A significantly greater proportion of individuals who had never received treatment with zidovudine developed AIDS compared with individuals who had (P = 0.04). But in a statistical analysis which took account of the changing availability of zidovudine over time, there was no significant association between the development of AIDS and treatment with zidovudine (P = 0.44). CONCLUSION Consistent with other studies, age appeared to increase the rate of progression to AIDS, although not significantly so in this study.
Collapse
Affiliation(s)
- E Kopec-Schrader
- National Centre in HIV Epidemiology and Clinical Research, University of New South Wales, Sydney, Australia
| | | | | | | | | |
Collapse
|
36
|
Thompson DM, Wylie B, Bryer-Ash M, Creed M, Jenkins L, Kozak S, Young S, Lucci D, Sanghera R, Wheeler A. To screen or not to screen. CMAJ 1993; 148:12-3; author reply 13-4. [PMID: 8439879 PMCID: PMC1488606] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
|
37
|
Pepper R, Wylie B. Normal antenatal management. BMJ 1991; 303:418-9. [PMID: 1912822 PMCID: PMC1670698 DOI: 10.1136/bmj.303.6799.418-b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
|
38
|
Wylie B. Muscle versus brain: chronic fatigue syndrome. Med J Aust 1991; 154:220. [PMID: 2025319] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
|
39
|
Abstract
A 31 year old woman was assessed following delivery of her second child affected by neonatal alloimmune thrombocytopenia (NAIT). Antiplatelet antibodies with specificity for Bak(a) were identified in the woman's serum and her platelets were typed as Bak(a) negative whilst her husband's were Bak(a) positive. Unlike the majority of reported anti-Bak(a) antibodies in the literature, this patient's serum contained no contaminating anti-HLA antibodies. This is the first report of NAIT caused by an anti-Bak(a) without co-existing anti-HLA antibodies. An anti-Bak(a) antibody has not previously been reported in Australia. The current status of this antigen system is reviewed.
Collapse
Affiliation(s)
- M Eisen
- N.S.W. Red Cross Blood Transfusion Service, Royal Prince Alfred Hospital, Sydney
| | | | | | | | | | | | | |
Collapse
|
40
|
Wylie B. Cuddle aid. Nurs Times 1990; 86:23. [PMID: 2377519] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
|
41
|
Wylie B. Aid for the AIDS children. Nurs Times 1990; 86:21. [PMID: 2315098] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
|
42
|
Wylie B. Gaza's grim reality. Nurs Times 1989; 85:16-7. [PMID: 2587346] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
|
43
|
Wylie B, Gibson J, Uhr E, Kronenberg H. von Willebrand's disease characterized by increased ristocetin sensitivity and the presence of all von Willebrand factor multimers in plasma: a new subtype. Pathology 1988; 20:62-3. [PMID: 3259690 DOI: 10.3109/00313028809085199] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
The clinical and laboratory features of a patient with a recently recognized new variant of von Willebrand's disease are presented. The importance of this variant is that it is associated with a clinically significant bleeding diathesis but with a normal skin bleeding time, PTTK, factor VIIIc and platelet aggregation with 1 mg/ml ristocetin. The distinctive laboratory features are increased platelet sensitivity to low concentrations of ristocetin, and the presence of all plasma von Willebrand factor multimers, but in reduced amounts. The need for thorough investigation of patients with significant bleeding history despite apparently normal screening tests is emphasized.
Collapse
Affiliation(s)
- B Wylie
- Haematology Department, Royal Prince Alfred Hospital, Sydney
| | | | | | | |
Collapse
|
44
|
Abstract
Three female psychogeriatric wards were selected for the study of behavioural programmes for the incontinent. Ward A underwent the full package of environmental changes and toilet training at the patients' peak evacuation times. Ward B combined five weeks of two-hourly toileting with the environmental changes, whereas Ward C had only the environmental changes. The results showed that there was a small decrease in incontinence only when the full programme was implemented. The other two wards showed such a large deterioration of continence that the results on Ward A became significant in comparison with them. Variables such as age, cognitive state and length of stay had no effect upon the continence level at the end of the programme, whereas there was a clear association between the initial level of incontinence and the end results. The relevance of early treatment is discussed.
Collapse
|
45
|
Shojania AM, Wylie B. The effect of oral contraceptives on vitamin B12 metabolism. Am J Obstet Gynecol 1979; 135:129-34. [PMID: 474643] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Serum vitamin vitamin B12 levels were determined in 199 women who were on a regimen of oral contraceptives of either the combination or sequential type and in a control group of 196 women. The group using oral contraceptive agents (OCA) had significantly lower serum levels of vitamin B12 vitamin as compared to those of the control group. A total of 19 women using OCAs had serum vitamin B12 levels that were lower than normal values. However, the Schilling test and urinary methylmalonate excretion in this group were normal. The OCA group had a significantly lower total serum vitamin B12 binding capacity, a lower total transcobalamin I level, and a higher transcobalamin III level. Our study suggests that the fall of serum vitamin B12 in OCA users is due to the changes in vitamin B12 binders of serum and does not represent vitamin B12 deficiency. Therefore, according to our data, there is no justification for vitamin B12 supplementation in users of oral contraceptives.
Collapse
|
46
|
Wylie B. Reproductive biology in the Oneida Community, 1848-1880. Bull Clevel Med Libr 1972; 19:91-8. [PMID: 12336631] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/26/2023]
|