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Guo D, Huang Y, Wang K, Yang C, Ma L, Zhang Y, Yu H, Cui M, Tang Z. Preparation and Characterization Evaluation of Poly(L-Glutamic Acid)- g-Methoxy Poly(Ethylene Glycol)/Combretastatin A4/BLZ945 Nanoparticles for Cervical Cancer Therapy. Int J Nanomedicine 2023; 18:6901-6914. [PMID: 38026524 PMCID: PMC10676729 DOI: 10.2147/ijn.s441131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2023] [Accepted: 11/12/2023] [Indexed: 12/01/2023] Open
Abstract
Purpose Cervical cancer (CC) is a highly vascularized tumor with abundant abnormal blood vessel, which could be targeted by therapeutic strategies. Poly(L-glutamic acid)-g-methoxy poly(ethylene glycol)/combretastatin A4 (CA4)/BLZ945 nanoparticles (CB-NPs) have shown great potential as nano vascular disrupting agents (VDAs) in the realm of synergistic cancer therapy. Methods In this study, we investigated the nanocharacteristics of CB-NPs, focusing on active pharmaceutical ingredients (API), as well as lyophilized samples combining API with protective agents (PAs). The in vivo efficacy of final sample (API + PAs) was evaluated. Results The assembled sphere of API with complex core and thin-shell structure was confirmed. PAs were found to significantly influence in vivo efficacy. Collaborative efforts between API and PAs, namely mannitol and lactose, resulted in the most promising lyophilized sample, ie, the final sample (FS2) for CC therapy. Impressively, FS2 demonstrated an exceptional 100% cure rate on the CC U14-bearing mice model. Conclusion FS2 has provided significant insights for cervical cancer therapy. It is also crucial to develop a comprehensive evaluation strategy for the formulation of nanomedicine, which has the potential to serve as a guideline for future clinical trials.
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Affiliation(s)
- Dongmei Guo
- Department of Gynecology and Obstetrics, The Second Hospital of Jilin University, Changchun, Jilin Province, 130041, People’s Republic of China
| | - Yue Huang
- Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, People’s Republic of China
| | - Kun Wang
- Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, People’s Republic of China
| | - Chenguang Yang
- Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, People’s Republic of China
| | - Lili Ma
- Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, People’s Republic of China
| | - Yu Zhang
- Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, People’s Republic of China
| | - Haiyang Yu
- Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, People’s Republic of China
| | - Manhua Cui
- Department of Gynecology and Obstetrics, The Second Hospital of Jilin University, Changchun, Jilin Province, 130041, People’s Republic of China
| | - Zhaohui Tang
- Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, People’s Republic of China
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WANG T, YANG L, XIE Y, CHENG S, XIONG M, LUO X. [An injectable hydrogel/staple fiber composite for sustained release of CA4P and doxorubicin for combined chemotherapy of xenografted breast tumor in mice]. NAN FANG YI KE DA XUE XUE BAO = JOURNAL OF SOUTHERN MEDICAL UNIVERSITY 2022; 42:625-632. [PMID: 35673904 PMCID: PMC9178649 DOI: 10.12122/j.issn.1673-4254.2022.05.01] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Accepted: 04/29/2022] [Indexed: 11/24/2022]
Abstract
OBJECTIVE To prepare an injectable hydrogel/staple fiber composite loaded with combretastain A-4 disodium phosphate (CA4P) and doxorubicin (DOX) and evaluate its antitumor efficacy via intratumoral injection. METHODS DOX-loaded PELA staple fibers (FDOX) were prepared using electro-spinning and cryo-cutting, and the drug distribution on the surface of the fibers was observed using a fluorescence microscope, and the encapsulation efficiency and loading capacity of FDOX were determined with a fluorospectro photometer. The fibers were then dispersed in CA4P-loaded PLGA-PEG-PLGA tri-block polymer solution at room temperature to obtain the hydrogel/staple fiber composite (GCA4P/FDOX). The thermo-sensitivity of this composite was determined by a test tube inverting method. An ultraviolet spectrophotometer and a fluorospectrophotometer were used to detect the release profile of CA4P and DOX, respectively. We observed in vivo gel formation of the composite after subcutaneous injection in mice. The in vitro cytotoxicity of GCA4P/FDOX composite in MCF-7 and 4T1 cells was assessed using cell Counting Kit-8 (CCK-8) reagent. In a mouse model bearing breast tumor 4T1 cell xenograft, we evaluated the antitumor efficacy of the composite by monitoring tumor growth within 30 days after intratumoral injection of the composite. HE staining, immunohistochemistry for Ki67 and immunofluorescence (TUNEL) assay were used for pathological examination of the tumor tissues 21 days after the treatments. RESULTS The average length of FDOX was 4.0±1.3 μm, and its drug loading capacity was (2.69±0.35)% with an encapsulation efficiency of (89.70±0.12)%. DOX was well distributed on the surface of the fibers. When the temperature increased to 37 ℃, the composite rapidly solidified to form a gel in vitro. Drug release behavior test showed that CA4P was completely released from the composite in 5 days and 87% of DOX was released in 30 days. After subcutaneous injection, the composite solidified rapidly without degradation at 24 h after injection. After incubation with GCA4P/FDOX for 72 h, only 30.6% of MCF-7 cells and 28.9% of 4T1 cells were viable. In the tumor-bearing mice, the tumor volume was 771.9±76.9 mm3 in GCA4P/FDOX treatment group at 30 days. Pathological examination revealed obvious necrosis of the tumor tissues and tumor cell apoptosis induced by intratumoral injection of G4A4P/FDOX. CONCLUSION As an efficient dual drug delivery system, this hydrogel/staple fiber composite provides a new strategy for local combined chemotherapy of solid tumors.
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Affiliation(s)
- Ting WANG
- />School of Public Health, Chengdu Medical College, Chengdu 610500, China成都医学院公共卫生学院,四川 成都 610500
| | - Ling YANG
- />School of Public Health, Chengdu Medical College, Chengdu 610500, China成都医学院公共卫生学院,四川 成都 610500
| | - Yuhan XIE
- />School of Public Health, Chengdu Medical College, Chengdu 610500, China成都医学院公共卫生学院,四川 成都 610500
| | - Siyu CHENG
- />School of Public Health, Chengdu Medical College, Chengdu 610500, China成都医学院公共卫生学院,四川 成都 610500
| | - Min XIONG
- />School of Public Health, Chengdu Medical College, Chengdu 610500, China成都医学院公共卫生学院,四川 成都 610500
| | - Xiaoming LUO
- />School of Public Health, Chengdu Medical College, Chengdu 610500, China成都医学院公共卫生学院,四川 成都 610500
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Liu L, O’Kelly D, Schuetze R, Carlson G, Zhou H, Trawick ML, Pinney KG, Mason RP. Non-Invasive Evaluation of Acute Effects of Tubulin Binding Agents: A Review of Imaging Vascular Disruption in Tumors. Molecules 2021; 26:2551. [PMID: 33925707 PMCID: PMC8125421 DOI: 10.3390/molecules26092551] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2021] [Revised: 04/15/2021] [Accepted: 04/19/2021] [Indexed: 12/16/2022] Open
Abstract
Tumor vasculature proliferates rapidly, generally lacks pericyte coverage, and is uniquely fragile making it an attractive therapeutic target. A subset of small-molecule tubulin binding agents cause disaggregation of the endothelial cytoskeleton leading to enhanced vascular permeability generating increased interstitial pressure. The resulting vascular collapse and ischemia cause downstream hypoxia, ultimately leading to cell death and necrosis. Thus, local damage generates massive amplification and tumor destruction. The tumor vasculature is readily accessed and potentially a common target irrespective of disease site in the body. Development of a therapeutic approach and particularly next generation agents benefits from effective non-invasive assays. Imaging technologies offer varying degrees of sophistication and ease of implementation. This review considers technological strengths and weaknesses with examples from our own laboratory. Methods reveal vascular extent and patency, as well as insights into tissue viability, proliferation and necrosis. Spatiotemporal resolution ranges from cellular microscopy to single slice tomography and full three-dimensional views of whole tumors and measurements can be sufficiently rapid to reveal acute changes or long-term outcomes. Since imaging is non-invasive, each tumor may serve as its own control making investigations particularly efficient and rigorous. The concept of tumor vascular disruption was proposed over 30 years ago and it remains an active area of research.
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Affiliation(s)
- Li Liu
- Department of Radiology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA; (L.L.); (D.O.); (R.S.); (H.Z.)
| | - Devin O’Kelly
- Department of Radiology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA; (L.L.); (D.O.); (R.S.); (H.Z.)
| | - Regan Schuetze
- Department of Radiology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA; (L.L.); (D.O.); (R.S.); (H.Z.)
| | - Graham Carlson
- Department of Chemistry and Biochemistry, Baylor University, Waco, TX 76798, USA; (G.C.); (M.L.T.); (K.G.P.)
| | - Heling Zhou
- Department of Radiology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA; (L.L.); (D.O.); (R.S.); (H.Z.)
| | - Mary Lynn Trawick
- Department of Chemistry and Biochemistry, Baylor University, Waco, TX 76798, USA; (G.C.); (M.L.T.); (K.G.P.)
| | - Kevin G. Pinney
- Department of Chemistry and Biochemistry, Baylor University, Waco, TX 76798, USA; (G.C.); (M.L.T.); (K.G.P.)
| | - Ralph P. Mason
- Department of Radiology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA; (L.L.); (D.O.); (R.S.); (H.Z.)
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Karatoprak GŞ, Küpeli Akkol E, Genç Y, Bardakcı H, Yücel Ç, Sobarzo-Sánchez E. Combretastatins: An Overview of Structure, Probable Mechanisms of Action and Potential Applications. Molecules 2020; 25:E2560. [PMID: 32486408 PMCID: PMC7321081 DOI: 10.3390/molecules25112560] [Citation(s) in RCA: 48] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2020] [Revised: 05/25/2020] [Accepted: 05/26/2020] [Indexed: 01/08/2023] Open
Abstract
Combretastatins are a class of closely related stilbenes (combretastatins A), dihydrostilbenes (combretastatins B), phenanthrenes (combretastatins C) and macrocyclic lactones (combretastatins D) found in the bark of Combretum caffrum (Eckl. & Zeyh.) Kuntze, commonly known as the South African bush willow. Some of the compounds in this series have been shown to be among the most potent antitubulin agents known. Due to their structural simplicity many analogs have also been synthesized. Combretastatin A4 phosphate is the most frequently tested compounds in preclinical and clinical trials. It is a water-soluble prodrug that the body can rapidly metabolize to combretastatin A4, which exhibits anti-tumor properties. In addition, in vitro and in vivo studies on combretastatins have determined that these compounds also have antioxidant, anti-inflammatory and antimicrobial effects. Nano-based formulations of natural or synthetic active agents such as combretastatin A4 phosphate exhibit several clear advantages, including improved low water solubility, prolonged circulation, drug targeting properties, enhanced efficiency, as well as fewer side effects. In this review, a synopsis of the recent literature exploring the combretastatins, their potential effects and nanoformulations as lead compounds in clinical applications is provided.
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Affiliation(s)
- Gökçe Şeker Karatoprak
- Department of Pharmacognosy, Faculty of Pharmacy, Erciyes University, 38039 Kayseri, Turkey;
| | - Esra Küpeli Akkol
- Department of Pharmacognosy Faculty of Pharmacy, Gazi University, 06330 Ankara, Turkey
| | - Yasin Genç
- Department of Pharmacognosy, Faculty of Pharmacy, Hacettepe University, 06100 Sıhhiye, Ankara, Turkey;
| | - Hilal Bardakcı
- Department of Pharmacognosy, Faculty of Pharmacy, Acibadem Mehmet Ali Aydınlar University, 34752 Istanbul, Turkey;
| | - Çiğdem Yücel
- Department of Pharmaceutical Technology, Faculty of Pharmacy, Erciyes University, 38039 Kayseri, Turkey;
| | - Eduardo Sobarzo-Sánchez
- Instituto de Investigación e Innovación en Salud, Facultad de Ciencias de la Salud, Universidad Central de Chile, Santiago 8330507, Chile;
- Department of Organic Chemistry, Faculty of Pharmacy, University of Santiago de Compostela, 15782 Santiago de Compostela, Spain
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Theranostic MRI liposomes for magnetic targeting and ultrasound triggered release of the antivascular CA4P. J Control Release 2020; 322:137-148. [PMID: 32145266 DOI: 10.1016/j.jconrel.2020.03.003] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2019] [Revised: 02/05/2020] [Accepted: 03/03/2020] [Indexed: 02/06/2023]
Abstract
Theranostic nanocarriers of antivascular drug encapsulated in thermosensitive ultramagnetic liposomes can be advantageously designed to provide a locally high concentration and an active delivery, with image-guided Magnetic Resonance Imaging (MRI) so as to reliably cure tumor. We propose a novel therapeutic strategy consisting of the magnetic accumulation of Ultra Magnetic Liposomes (UML) followed by High-Intensity Focused Ultrasound (HIFU) to trigger the release of an antivascular agent monitored by MRI. For this purpose, we co-encapsulated Combretastatin A4 phosphate (CA4P), a vascular disrupting agent, in the core of UML to obtain CA4P-loaded thermosensitive Ultra Magnetic Liposomes (CA4P-UML). To assess the HIFU parameters, the CA4P release has been triggered in vitro by local heating HIFU at the lipids transition temperature. Morphology of endothelial cells was assessed to evaluate the effect of encapsulated versus non-encapsulated CA4P. The efficiency of a treatment combining the magnetic targeting of CA4P-UML with the CA4P release triggered by HIFU was studied in CT26 murine tumors. Tumor perfusion and volume regression parameters were monitored by multiparametric quantitative anatomical and dynamic in vivo MRI at 7 T. Additionally, vascularization and cellularity were evaluated ex-vivo by histology. This thorough investigation showed that the combined treatment exhibited a full benefit. A 150-fold improvement compared with the chemotherapy alone was obtained using a magnetic targeting of CA4P-UML triggered by HIFU, and was consistent with an expected effect on vascularization 24 h after treatment.
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Han W, Shi L, Xie B, Wan J, Ren L, Wang Y, Chen X, Wang H. Supramolecular Engineering of Molecular Inhibitors in an Adaptive Cytotoxic Nanoparticle for Synergistic Cancer Therapy. ACS APPLIED MATERIALS & INTERFACES 2020; 12:1707-1720. [PMID: 31816241 DOI: 10.1021/acsami.9b20178] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Combinatorial regimens that rationally pair molecular inhibitors with standard cytotoxic chemotherapeutics are used to improve therapeutic outcomes. Simultaneously engineering these therapies within a single nanocarrier that spans cytotoxic, antiangiogenic, and anti-invasive mechanisms and that enables the delivery of unique drug combinations remains a technical challenge. In this study, we developed a simple and broadly applicable strategy in which ultrastable cytotoxic nanoparticles with an established excellent antitumor efficacy and π-rich inner core structure supramolecularly stabilized the antiangiogenic molecular inhibitor apatinib to create a synergistic drug delivery system (termed sTKI-pSN38). This small-sized nanoparticle accomplished the sequential release of both encapsulated drugs to exert antimetastatic, antivascular, and cytotoxic activities simultaneously. In xenograft models of hepatocellular carcinoma, a single intravenous administration of sTKI-pSN38 elicited robust and durable tumor reduction and suppressed metastasis to lymph nodes. Interestingly, sTKI-pSN38 treatment alleviated intratumoral hypoxia, which could contribute to impaired tumor metastasis and reduced drug resistance. Collectively, this nanotherapeutic platform offers a new strategy for cancer therapy by simply engineering a drug cocktail in conventional nanoparticles and by enabling the spatiotemporal modulation of drug release to enhance the synergy of the combined drugs.
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Affiliation(s)
- Weidong Han
- Department of Medical Oncology, Sir Run Run Shaw Hospital, School of Medicine , Zhejiang University , Hangzhou , 310016 , PR China
| | - Linlin Shi
- Department of Medical Oncology, Sir Run Run Shaw Hospital, School of Medicine , Zhejiang University , Hangzhou , 310016 , PR China
| | - Binbin Xie
- Department of Medical Oncology, Sir Run Run Shaw Hospital, School of Medicine , Zhejiang University , Hangzhou , 310016 , PR China
| | - Jianqin Wan
- Key Laboratory of Combined Multi-Organ Transplantation, Ministry of Public Health, The First Affiliated Hospital, School of Medicine , Zhejiang University , Hangzhou , 310003 , PR China
| | - Lulu Ren
- Department of Medical Oncology, Sir Run Run Shaw Hospital, School of Medicine , Zhejiang University , Hangzhou , 310016 , PR China
| | - Yuchen Wang
- Key Laboratory of Combined Multi-Organ Transplantation, Ministry of Public Health, The First Affiliated Hospital, School of Medicine , Zhejiang University , Hangzhou , 310003 , PR China
| | - Xiaona Chen
- Key Laboratory of Combined Multi-Organ Transplantation, Ministry of Public Health, The First Affiliated Hospital, School of Medicine , Zhejiang University , Hangzhou , 310003 , PR China
| | - Hangxiang Wang
- Department of Medical Oncology, Sir Run Run Shaw Hospital, School of Medicine , Zhejiang University , Hangzhou , 310016 , PR China
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Gill JH, Rockley KL, De Santis C, Mohamed AK. Vascular Disrupting Agents in cancer treatment: Cardiovascular toxicity and implications for co-administration with other cancer chemotherapeutics. Pharmacol Ther 2019; 202:18-31. [PMID: 31173840 DOI: 10.1016/j.pharmthera.2019.06.001] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2018] [Accepted: 05/30/2019] [Indexed: 02/08/2023]
Abstract
Destruction of the established tumour vasculature by a class of compound termed Vascular Disrupting Agents (VDAs) is showing considerable promise as a viable approach for the management of solid tumours. VDAs induce a rapid shutdown and collapse of tumour blood vessels, leading to ischaemia and consequent necrosis of the tumour mass. Their efficacy is hindered by the persistence of a viable rim of tumour cells, supported by the peripheral normal vasculature, necessitating their co-administration with additional chemotherapeutics for maximal therapeutic benefit. However, a major limitation for the use of many cancer therapeutics is the development of life-threatening cardiovascular toxicities, with significant consequences for treatment response and the patient's quality of life. The aim of this review is to outline VDAs as a cancer therapeutic approach and define the mechanistic basis of cardiovascular toxicities of current chemotherapeutics, with the overall objective of discussing whether VDA combinations with specific chemotherapeutic classes would be good or bad in terms of cardiovascular toxicity.
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Affiliation(s)
- Jason H Gill
- Northern Institute for Cancer Research (NICR), Faculty of Medical Sciences, Newcastle University, UK; School of Pharmacy, Faculty of Medical Sciences, Newcastle University, UK.
| | - Kimberly L Rockley
- Northern Institute for Cancer Research (NICR), Faculty of Medical Sciences, Newcastle University, UK
| | - Carol De Santis
- Northern Institute for Cancer Research (NICR), Faculty of Medical Sciences, Newcastle University, UK
| | - Asma K Mohamed
- Northern Institute for Cancer Research (NICR), Faculty of Medical Sciences, Newcastle University, UK
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Tomaszewski MR, Gonzalez IQ, O'Connor JPB, Abeyakoon O, Parker GJM, Williams KJ, Gilbert FJ, Bohndiek SE. Oxygen Enhanced Optoacoustic Tomography (OE-OT) Reveals Vascular Dynamics in Murine Models of Prostate Cancer. Theranostics 2017; 7:2900-2913. [PMID: 28824724 PMCID: PMC5562224 DOI: 10.7150/thno.19841] [Citation(s) in RCA: 67] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2017] [Accepted: 05/02/2017] [Indexed: 02/07/2023] Open
Abstract
Poor oxygenation of solid tumours has been linked with resistance to chemo- and radio-therapy and poor patient outcomes, hence non-invasive imaging of oxygen supply and demand in tumours could improve disease staging and therapeutic monitoring. Optoacoustic tomography (OT) is an emerging clinical imaging modality that provides static images of endogenous haemoglobin concentration and oxygenation. Here, we demonstrate oxygen enhanced (OE)-OT, exploiting an oxygen gas challenge to visualise the spatiotemporal heterogeneity of tumour vascular function. We show that tracking oxygenation dynamics using OE-OT reveals significant differences between two prostate cancer models in nude mice with markedly different vascular function (PC3 & LNCaP), which appear identical in static OT. LNCaP tumours showed a spatially heterogeneous response within and between tumours, with a substantial but slow response to the gas challenge, aligned with ex vivo analysis, which revealed a generally perfused and viable tumour with marked areas of haemorrhage. PC3 tumours had a lower fraction of responding pixels compared to LNCaP with a high disparity between rim and core response. While the PC3 core showed little or no dynamic response, the rim showed a rapid change, consistent with our ex vivo findings of hypoxic and necrotic core tissue surrounded by a rim of mature and perfused vasculature. OE-OT metrics are shown to be highly repeatable and correlate directly on a per-tumour basis to tumour vessel function assessed ex vivo. OE-OT provides a non-invasive approach to reveal the complex dynamics of tumour vessel perfusion, permeability and vasoactivity in real time. Our findings indicate that OE-OT holds potential for application in prostate cancer patients, to improve delineation of aggressive and indolent disease as well as in patient stratification for chemo- and radio-therapy.
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Affiliation(s)
- Michal R Tomaszewski
- Department of Physics, University of Cambridge, U.K
- Cancer Research UK Cambridge Institute, University of Cambridge, U.K
| | - Isabel Quiros Gonzalez
- Department of Physics, University of Cambridge, U.K
- Cancer Research UK Cambridge Institute, University of Cambridge, U.K
| | - James PB O'Connor
- Institute of Cancer Sciences, University of Manchester, U.K
- Department of Radiology, The Christie NHS Foundation Trust, U.K
| | | | - Geoff JM Parker
- Centre for Imaging Sciences, University of Manchester, U.K
- Bioxydyn Limited, Manchester, U.K
| | | | | | - Sarah E Bohndiek
- Department of Physics, University of Cambridge, U.K
- Cancer Research UK Cambridge Institute, University of Cambridge, U.K
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