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de Lima PO, Broit N, Huang JD, Lim JH, Gardiner DJ, Brown IS, Panizza BJ, Boyle GM, Simpson F. Development of an in vivo murine model of perineural invasion and spread of cutaneous squamous cell carcinoma of the head and neck. Front Oncol 2023; 13:1231104. [PMID: 37746297 PMCID: PMC10513369 DOI: 10.3389/fonc.2023.1231104] [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] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Accepted: 07/06/2023] [Indexed: 09/26/2023] Open
Abstract
Introduction Cutaneous squamous cell carcinoma of the head and neck (cSCCHN) can metastasize by invading nerves and spread toward the central nervous system. This metastatic process is called perineural invasion (PNI) and spread (PNS). An in vivo sciatic nerve mouse model is used for cSCCHN PNI/PNS. Here we describe a complementary whisker pad model which allows for molecular studies investigating drivers of PNI/PNS in the head and neck environment. Methods A431 cells were injected into the whisker pads of BALB/c Foxn1nu and NSG-A2 mice. Tumor progression was monitored by bioluminescence imaging and primary tumor resection was performed. PNI was detected by H&E and IHC. Tumor growth and PNI were assessed with inducible ablation of LOXL2. Results The rate of PNI development in mice was 10%-28.6%. Tumors exhibited PNI/PNS reminiscent of the morphology seen in the human disease. Our model's utility was demonstrated with inducible ablation of LOXL2 reducing primary tumor growth and PNI. Discussion This model consists in a feasible way to test molecular characteristics and potential therapies, offers to close a gap in the described in vivo methods for PNI/PNS of cSCCHN and has uses in concert with the established sciatic nerve model.
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Affiliation(s)
| | - Natasa Broit
- Cancer Drug Mechanisms Group, Queensland Institute of Medical Research (QIMR) Berghofer Medical Research Institute, Brisbane, QLD, Australia
| | - Johnson D. Huang
- Frazer Institute, University of Queensland, Brisbane, QLD, Australia
| | - Jae H. Lim
- Cancer Drug Mechanisms Group, Queensland Institute of Medical Research (QIMR) Berghofer Medical Research Institute, Brisbane, QLD, Australia
- Queensland Skull Base Unit and Department of Otolaryngology, Head and Neck Surgery, Princess Alexandra Hospital, Brisbane, QLD, Australia
| | - Damien J. Gardiner
- Cancer Drug Mechanisms Group, Queensland Institute of Medical Research (QIMR) Berghofer Medical Research Institute, Brisbane, QLD, Australia
- Queensland Skull Base Unit and Department of Otolaryngology, Head and Neck Surgery, Princess Alexandra Hospital, Brisbane, QLD, Australia
| | - Ian S. Brown
- Envoi Pathology, Brisbane, QLD, Australia
- Faculty of Medicine, University of Queensland, Brisbane, QLD, Australia
| | - Benedict J. Panizza
- Queensland Skull Base Unit and Department of Otolaryngology, Head and Neck Surgery, Princess Alexandra Hospital, Brisbane, QLD, Australia
- Department of Otolaryngology-Head and Neck Surgery, Kaiser Moanalua Medical Center, Honolulu, HI, United States
| | - Glen M. Boyle
- Cancer Drug Mechanisms Group, Queensland Institute of Medical Research (QIMR) Berghofer Medical Research Institute, Brisbane, QLD, Australia
- Faculty of Health, Queensland University of Technology, Brisbane, QLD, Australia
| | - Fiona Simpson
- Frazer Institute, University of Queensland, Brisbane, QLD, Australia
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Mackay TG, Gardiner DJ, Gundara JS. Post-cholecystectomy haemobilia: a rare complication. ANZ J Surg 2023; 93:748-749. [PMID: 35950686 DOI: 10.1111/ans.17963] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Accepted: 07/24/2022] [Indexed: 11/26/2022]
Affiliation(s)
- Thomas G Mackay
- Division of Surgery, Logan Hospital, Metro South Hospital and Health Service, Logan, Queensland, Australia
- School of Medicine and Dentistry, Griffith University, Brisbane, Queensland, Australia
| | - Damien J Gardiner
- Division of Surgery, Logan Hospital, Metro South Hospital and Health Service, Logan, Queensland, Australia
- School of Medicine and Dentistry, Griffith University, Brisbane, Queensland, Australia
| | - Justin S Gundara
- Division of Surgery, Logan Hospital, Metro South Hospital and Health Service, Logan, Queensland, Australia
- School of Medicine and Dentistry, Griffith University, Brisbane, Queensland, Australia
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Qasim MM, Khan AA, Kostanyan A, Kidambi PR, Cabrero-Vilatela A, Braeuninger-Weimer P, Gardiner DJ, Hofmann S, Wilkinson TD. Hybrid graphene nematic liquid crystal light scattering device. Nanoscale 2015; 7:14114-14120. [PMID: 26243047 DOI: 10.1039/c5nr04094a] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
A hybrid graphene nematic liquid crystal (LC) light scattering device is presented. This device exploits the inherent poly-crystallinity of chemical vapour deposited (CVD) graphene films to induce directional anchoring and formation of LC multi-domains. This thereby enables efficient light scattering without the need for crossed polarisers or separate alignment layers/additives. The hybrid LC device exhibits switching thresholds at very low electric fields (< 1 V μm(-1)) and repeatable, hysteresis free characteristics. This exploitation of LC alignment effects on CVD graphene films enables a new generation of highly efficient nematic LC scattering displays as well as many other possible applications.
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Affiliation(s)
- M M Qasim
- Centre of Molecular Materials for Photonics and Electronics, Department of Engineering, University of Cambridge, 9 J.J. Thomson Avenue, Cambridge, CB3 0FA, UK.
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Castles F, Day FV, Morris SM, Ko DH, Gardiner DJ, Qasim MM, Nosheen S, Hands PJW, Choi SS, Friend RH, Coles HJ. Blue-phase templated fabrication of three-dimensional nanostructures for photonic applications. Nat Mater 2012; 11:599-603. [PMID: 22581313 DOI: 10.1038/nmat3330] [Citation(s) in RCA: 105] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2011] [Accepted: 04/10/2012] [Indexed: 05/31/2023]
Abstract
A promising approach to the fabrication of materials with nanoscale features is the transfer of liquid-crystalline structure to polymers. However, this has not been achieved in systems with full three-dimensional periodicity. Here we demonstrate the fabrication of self-assembled three-dimensional nanostructures by polymer templating blue phase I, a chiral liquid crystal with cubic symmetry. Blue phase I was photopolymerized and the remaining liquid crystal removed to create a porous free-standing cast, which retains the chiral three-dimensional structure of the blue phase, yet contains no chiral additive molecules. The cast may in turn be used as a hard template for the fabrication of new materials. By refilling the cast with an achiral nematic liquid crystal, we created templated blue phases that have unprecedented thermal stability in the range -125 to 125 °C, and that act as both mirrorless lasers and switchable electro-optic devices. Blue-phase templated materials will facilitate advances in device architectures for photonics applications in particular.
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Affiliation(s)
- F Castles
- Centre of Molecular Materials for Photonics and Electronics, Department of Engineering, University of Cambridge, 9 JJ Thomson Avenue, Cambridge CB3 0FA, UK
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Abstract
Raman microscopy--the analysis of scattered photons after excitation--is well established in non-biological sciences for the identification of crystals. It shows promise in biological (clinical) specimens also, as demonstrated here in studies of synovial fluid, synovium, and gouty tophus, selected for their known content of sodium urate and calcium pyrophosphate crystals.
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Affiliation(s)
- N McGill
- Rheumatology Unit, Bristol Royal Infirmary, Newcastle upon Tyne, UK
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