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Chen F, Zhang Z, Shen R, Chen M, Li G, Zhu X. Generation and characterization of patient-derived xenografts from patients with osteosarcoma. Tissue Cell 2022; 79:101911. [DOI: 10.1016/j.tice.2022.101911] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2022] [Revised: 06/03/2022] [Accepted: 08/28/2022] [Indexed: 02/07/2023]
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Miyamoto S, Tanaka T, Hirosuna K, Nishie R, Ueda S, Hashida S, Terada S, Konishi H, Kogata Y, Taniguchi K, Komura K, Ohmichi M. Validation of a Patient-Derived Xenograft Model for Cervical Cancer Based on Genomic and Phenotypic Characterization. Cancers (Basel) 2022; 14:cancers14122969. [PMID: 35740635 PMCID: PMC9221029 DOI: 10.3390/cancers14122969] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2022] [Revised: 06/09/2022] [Accepted: 06/14/2022] [Indexed: 12/04/2022] Open
Abstract
Simple Summary The rate of total tumor engraftment of patient-derived xenografts is 50% in cervical cancer. These cancers retain their histopathological characteristics. The gene mutations and expression patterns associated with carcinogenesis and infiltration and the expression levels of genes in extracellular vesicles released from the tumors are similar between patient-derived xenograft models and primary tumors. Patient-derived xenograft models of cervical cancer could be potentially useful tools for translational research. Abstract Patient-derived xenograft (PDX) models are useful tools for preclinical drug evaluation, biomarker identification, and personalized medicine strategies, and can be developed by the heterotopic or orthotopic grafting of surgically resected tumors into immunodeficient mice. We report the PDX models of cervical cancer and demonstrate the similarities among original and different generations of PDX tumors. Fresh tumor tissues collected from 22 patients with primary cervical cancer were engrafted subcutaneously into NOD.CB17-PrkdcSCID/J mice. Histological and immunohistochemical analyses were performed to compare primary and different generations of PDX tumors. DNA and RNA sequencing were performed to verify the similarity between the genetic profiles of primary and PDX tumors. Total RNA in extracellular vesicles (EVs) released from primary and PDX tumors was also quantified to evaluate gene expression. The total tumor engraftment rate was 50%. Histologically, no major differences were observed between the original and PDX tumors. Most of the gene mutations and expression patterns related to carcinogenesis and infiltration were similar between the primary tumor and xenograft. Most genes associated with carcinogenesis and infiltration showed similar expression levels in the primary tumor and xenograft EVs. Therefore, compared with primary tumors, PDX models could be potentially more useful for translational research.
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Affiliation(s)
- Shunsuke Miyamoto
- Department of Obstetrics and Gynecology, Educational Foundation of Osaka Medical and Pharmaceutical University, 2-7, Daigaku-machi, Takatsuki 569-8686, Osaka, Japan; (S.M.); (R.N.); (S.U.); (S.H.); (S.T.); (H.K.); (Y.K.); (M.O.)
- Translational Research Program, Educational Foundation of Osaka Medical and Pharmaceutical University, 2-7, Daigaku-machi, Takatsuki 569-8686, Osaka, Japan; (K.H.); (K.T.); (K.K.)
| | - Tomohito Tanaka
- Department of Obstetrics and Gynecology, Educational Foundation of Osaka Medical and Pharmaceutical University, 2-7, Daigaku-machi, Takatsuki 569-8686, Osaka, Japan; (S.M.); (R.N.); (S.U.); (S.H.); (S.T.); (H.K.); (Y.K.); (M.O.)
- Translational Research Program, Educational Foundation of Osaka Medical and Pharmaceutical University, 2-7, Daigaku-machi, Takatsuki 569-8686, Osaka, Japan; (K.H.); (K.T.); (K.K.)
- Correspondence: ; Tel.: +81-726-83-1221
| | - Kensuke Hirosuna
- Translational Research Program, Educational Foundation of Osaka Medical and Pharmaceutical University, 2-7, Daigaku-machi, Takatsuki 569-8686, Osaka, Japan; (K.H.); (K.T.); (K.K.)
| | - Ruri Nishie
- Department of Obstetrics and Gynecology, Educational Foundation of Osaka Medical and Pharmaceutical University, 2-7, Daigaku-machi, Takatsuki 569-8686, Osaka, Japan; (S.M.); (R.N.); (S.U.); (S.H.); (S.T.); (H.K.); (Y.K.); (M.O.)
| | - Shoko Ueda
- Department of Obstetrics and Gynecology, Educational Foundation of Osaka Medical and Pharmaceutical University, 2-7, Daigaku-machi, Takatsuki 569-8686, Osaka, Japan; (S.M.); (R.N.); (S.U.); (S.H.); (S.T.); (H.K.); (Y.K.); (M.O.)
| | - Sousuke Hashida
- Department of Obstetrics and Gynecology, Educational Foundation of Osaka Medical and Pharmaceutical University, 2-7, Daigaku-machi, Takatsuki 569-8686, Osaka, Japan; (S.M.); (R.N.); (S.U.); (S.H.); (S.T.); (H.K.); (Y.K.); (M.O.)
| | - Shinichi Terada
- Department of Obstetrics and Gynecology, Educational Foundation of Osaka Medical and Pharmaceutical University, 2-7, Daigaku-machi, Takatsuki 569-8686, Osaka, Japan; (S.M.); (R.N.); (S.U.); (S.H.); (S.T.); (H.K.); (Y.K.); (M.O.)
| | - Hiromi Konishi
- Department of Obstetrics and Gynecology, Educational Foundation of Osaka Medical and Pharmaceutical University, 2-7, Daigaku-machi, Takatsuki 569-8686, Osaka, Japan; (S.M.); (R.N.); (S.U.); (S.H.); (S.T.); (H.K.); (Y.K.); (M.O.)
| | - Yuhei Kogata
- Department of Obstetrics and Gynecology, Educational Foundation of Osaka Medical and Pharmaceutical University, 2-7, Daigaku-machi, Takatsuki 569-8686, Osaka, Japan; (S.M.); (R.N.); (S.U.); (S.H.); (S.T.); (H.K.); (Y.K.); (M.O.)
| | - Kohei Taniguchi
- Translational Research Program, Educational Foundation of Osaka Medical and Pharmaceutical University, 2-7, Daigaku-machi, Takatsuki 569-8686, Osaka, Japan; (K.H.); (K.T.); (K.K.)
| | - Kazumasa Komura
- Translational Research Program, Educational Foundation of Osaka Medical and Pharmaceutical University, 2-7, Daigaku-machi, Takatsuki 569-8686, Osaka, Japan; (K.H.); (K.T.); (K.K.)
| | - Masahide Ohmichi
- Department of Obstetrics and Gynecology, Educational Foundation of Osaka Medical and Pharmaceutical University, 2-7, Daigaku-machi, Takatsuki 569-8686, Osaka, Japan; (S.M.); (R.N.); (S.U.); (S.H.); (S.T.); (H.K.); (Y.K.); (M.O.)
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DMPC/Chol liposomal copper CX5461 is therapeutically superior to a DSPC/Chol formulation. J Control Release 2022; 345:75-90. [DOI: 10.1016/j.jconrel.2022.03.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2021] [Revised: 02/25/2022] [Accepted: 03/02/2022] [Indexed: 11/20/2022]
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Cai Y, Chen T, Liu J, Peng S, Liu H, Lv M, Ding Z, Zhou Z, Li L, Zeng S, Xiao E. Orthotopic Versus Allotopic Implantation: Comparison of Radiological and Pathological Characteristics. J Magn Reson Imaging 2021; 55:1133-1140. [PMID: 34611963 PMCID: PMC9291575 DOI: 10.1002/jmri.27940] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2021] [Revised: 09/14/2021] [Accepted: 09/14/2021] [Indexed: 11/11/2022] Open
Abstract
Background In experimental animal models, implantation location might influence the heterogeneity and overall development of the tumor, leading to an interpretation bias. Purpose To investigate the effects of implantation location in experimental tumor model using magnetic resonance imaging (MRI) and pathological findings. Study Type Prospective. Subjects Forty‐five breast cancer‐bearing mice underwent orthotopic (N = 15) and heterotopic (intrahepatic [N = 15] and subcutaneous [N = 15]) implantation. Field Strength/Sequence Sequences including: T1‐weighted turbo spin echo sequence, T2‐weighted blade sequence, diffusion‐weighted imaging, pre‐ and post‐contrast T1 mapping, multi‐echo T2 mapping at 3.0 T. Assessment MRI was performed at 7, 14, and 21 days after implantation. Native T1, post‐contrast T1, T2, and apparent diffusion coefficient (ADC) of tumors, the tumor volume and necrosis volume within tumor were obtained. Lymphocyte cells from H&E staining, Ki67‐positive, and CD31‐positive cells from immunohistochemistry were determined. Statistical Tests One‐way analysis of variance and Spearman's rank correlation were performed. P value <0.05 was considered statistically significant. Results The tumor volume (intrahepatic vs. orthotopic vs. subcutaneous: 587.50 ± 77.62 mm3 vs. 814.00 ± 43.85 mm3 vs. 956.13 ± 119.22 mm3), necrosis volume within tumor (89.10 ± 26.60 mm3 vs. 292.41 ± 57.92 mm3 vs. 179.91 ± 31.73 mm3, respectively), ADC at day 21 (543.41 ± 42.28 vs. 542.92 ± 99.67 vs. 369.83 ± 42.90, respectively), and post‐contrast T1 at all timepoints (day 7: 442.00 ± 11.52 vs. 435.00 ± 22.90 vs. 394.33 ± 29.95; day 14: 459.00 ± 26.11 vs. 436.83 ± 26.01 vs. 377.00 ± 27.83; day 21: 463.50 ± 23.49 vs. 458.00 ± 34.28 vs. 375.00 ± 30.55) were significantly different between three groups. Necrosis volumes of subcutaneous and intrahepatic tumors were significantly lower than those of orthotopic tumors. The CD31‐positive rate in the intrahepatic implantation was significantly higher than in orthotopic and subcutaneous groups. Necrosis volume (r = −0.71), ADC (r = −0.85), and post‐contrast T1 (r = −0.75) were strongly correlated with vascular invasion index. Data Conclusion Orthotopic and heterotopic tumors have their unique growth kinetics, necrosis volume, and vascular invasion. Non‐invasive MR quantitative parameters, including ADC and post‐contrast T1, may reflect vascular invasion in mice. Level of Evidence 1 Technical Efficacy Stage 3
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Affiliation(s)
- YeYu Cai
- Department of Radiology, The Second Xiangya Hospital, Central South University, Changsha, China
| | - TaiLi Chen
- Department of Oncology, Xiangya Hospital, Central South University, Changsha, China
| | - JiaYi Liu
- Department of Radiology, The Second Xiangya Hospital, Central South University, Changsha, China
| | - ShuHui Peng
- Department of Radiology, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Huan Liu
- Department of Radiology, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Min Lv
- Department of Radiology, The Second Xiangya Hospital, Central South University, Changsha, China
| | - ZhuYuan Ding
- Department of Radiology, The Second Xiangya Hospital, Central South University, Changsha, China
| | - ZiYi Zhou
- Department of Radiology, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Lan Li
- Department of Pathology, The Second Xiangya Hospital, Central South University, Changsha, China
| | - Shan Zeng
- Department of Oncology, Xiangya Hospital, Central South University, Changsha, China
| | - EnHua Xiao
- Department of Radiology, The Second Xiangya Hospital, Central South University, Changsha, China.,Molecular Imaging Research Center, Central South University, Changsha, China.,Clinical Research Center for Medical Imaging in Hunan Province, Changsha, China
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Chen C, Lin W, Huang Y, Chen X, Wang H, Teng L. The Essential Factors of Establishing Patient-derived Tumor Model. J Cancer 2021; 12:28-37. [PMID: 33391400 PMCID: PMC7738839 DOI: 10.7150/jca.51749] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2020] [Accepted: 10/18/2020] [Indexed: 12/15/2022] Open
Abstract
Establishing an applicable preclinical model is vital for translational cancer research. Patient-derived xenograft has been important preclinical model systems and widely used for cancer research. Patient-derived xenograft models that represent the tumors of the patients are necessary to better translate research discoveries and to test potential therapeutic approaches. However, research in this field is hampered by the limited engraftment rate. In this review, we go over a large number of researches on patient-derived xenograft transplantation and firstly systematically summarize the main factors in methodology to successfully establish models. These results will be applied to the development of patient-derived xenograft leading to better preclinical research.
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Affiliation(s)
- Chuanzhi Chen
- Department of Surgical Oncology, the First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou 310003, China
| | - Wu Lin
- Department of Surgical Oncology, the First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou 310003, China
| | - Yingying Huang
- Department of Surgical Oncology, the First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou 310003, China
| | - Xiangliu Chen
- Department of Surgical Oncology, the First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou 310003, China
| | - Haohao Wang
- Department of Surgical Oncology, the First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou 310003, China
| | - Lisong Teng
- Department of Surgical Oncology, the First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou 310003, China
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Dunlop CR, Wallez Y, Johnson TI, Bernaldo de Quirós Fernández S, Durant ST, Cadogan EB, Lau A, Richards FM, Jodrell DI. Complete loss of ATM function augments replication catastrophe induced by ATR inhibition and gemcitabine in pancreatic cancer models. Br J Cancer 2020; 123:1424-1436. [PMID: 32741974 PMCID: PMC7591912 DOI: 10.1038/s41416-020-1016-2] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2020] [Revised: 07/01/2020] [Accepted: 07/16/2020] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND Personalised medicine strategies may improve outcomes in pancreatic ductal adenocarcinoma (PDAC), but validation of predictive biomarkers is required. Having developed a clinical trial to assess the ATR inhibitor, AZD6738, in combination with gemcitabine (ATRi/gem), we investigated ATM loss as a predictive biomarker of response to ATRi/gem in PDAC. METHODS Through kinase inhibition, siRNA depletion and CRISPR knockout of ATM, we assessed how ATM targeting affected the sensitivity of PDAC cells to ATRi/gem. Using flow cytometry, immunofluorescence and immunoblotting, we investigated how ATRi/gem synergise in ATM-proficient and ATM-deficient cells, before assessing the impact of ATM loss on ATRi/gem sensitivity in vivo. RESULTS Complete loss of ATM function (through pharmacological inhibition or CRISPR knockout), but not siRNA depletion, sensitised to ATRi/gem. In ATM-deficient cells, ATRi/gem-induced replication catastrophe was augmented, while phospho-Chk2-T68 and phospho-KAP1-S824 persisted via DNA-PK activity. ATRi/gem caused growth delay in ATM-WT xenografts in NSG mice and induced regression in ATM-KO xenografts. CONCLUSIONS ATM loss augments replication catastrophe-mediated cell death induced by ATRi/gem and may predict clinical responsiveness to this combination. ATM status should be carefully assessed in tumours from patients with PDAC, since distinction between ATM-low and ATM-null could be critical in maximising the success of clinical trials using ATM expression as a predictive biomarker.
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Affiliation(s)
- Charles R Dunlop
- Cancer Research UK Cambridge Institute, University of Cambridge, Cambridge, UK.
| | - Yann Wallez
- Cancer Research UK Cambridge Institute, University of Cambridge, Cambridge, UK
- Bioscience, Early Oncology R&D, AstraZeneca, Cambridge, UK
| | | | | | | | | | - Alan Lau
- Bioscience, Early Oncology R&D, AstraZeneca, Cambridge, UK
| | - Frances M Richards
- Cancer Research UK Cambridge Institute, University of Cambridge, Cambridge, UK
| | - Duncan I Jodrell
- Cancer Research UK Cambridge Institute, University of Cambridge, Cambridge, UK.
- Department of Oncology, University of Cambridge, Cambridge, UK.
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Hessmann E, Buchholz SM, Demir IE, Singh SK, Gress TM, Ellenrieder V, Neesse A. Microenvironmental Determinants of Pancreatic Cancer. Physiol Rev 2020; 100:1707-1751. [DOI: 10.1152/physrev.00042.2019] [Citation(s) in RCA: 86] [Impact Index Per Article: 21.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Pancreatic ductal adenocarcinoma (PDAC) belongs to the most lethal solid tumors in humans. A histological hallmark feature of PDAC is the pronounced tumor microenvironment (TME) that dynamically evolves during tumor progression. The TME consists of different non-neoplastic cells such as cancer-associated fibroblasts, immune cells, endothelial cells, and neurons. Furthermore, abundant extracellular matrix components such as collagen and hyaluronic acid as well as matricellular proteins create a highly dynamic and hypovascular TME with multiple biochemical and physical interactions among the various cellular and acellular components that promote tumor progression and therapeutic resistance. In recent years, intensive research efforts have resulted in a significantly improved understanding of the biology and pathophysiology of the TME in PDAC, and novel stroma-targeted approaches are emerging that may help to improve the devastating prognosis of PDAC patients. However, none of anti-stromal therapies has been approved in patients so far, and there is still a large discrepancy between multiple successful preclinical results and subsequent failure in clinical trials. Furthermore, recent findings suggest that parts of the TME may also possess tumor-restraining properties rendering tailored therapies even more challenging.
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Affiliation(s)
- Elisabeth Hessmann
- Department of Gastroenterology, Gastrointestinal Oncology, and Endocrinology, University Medical Centre Goettingen, Georg August University, Goettingen, Germany; Department of Surgery, Klinikum rechts der Isar, Technische Universität München, School of Medicine Munich, Munich, Germany; Sonderforschungsbereich/Collaborative Research Centre 1321 Modeling and Targeting Pancreatic Cancer, Munich, Germany; Deutsches Konsortium für Translationale Krebsforschung (DKTK) Munich Site, Munich, Germany; and
| | - Soeren M. Buchholz
- Department of Gastroenterology, Gastrointestinal Oncology, and Endocrinology, University Medical Centre Goettingen, Georg August University, Goettingen, Germany; Department of Surgery, Klinikum rechts der Isar, Technische Universität München, School of Medicine Munich, Munich, Germany; Sonderforschungsbereich/Collaborative Research Centre 1321 Modeling and Targeting Pancreatic Cancer, Munich, Germany; Deutsches Konsortium für Translationale Krebsforschung (DKTK) Munich Site, Munich, Germany; and
| | - Ihsan Ekin Demir
- Department of Gastroenterology, Gastrointestinal Oncology, and Endocrinology, University Medical Centre Goettingen, Georg August University, Goettingen, Germany; Department of Surgery, Klinikum rechts der Isar, Technische Universität München, School of Medicine Munich, Munich, Germany; Sonderforschungsbereich/Collaborative Research Centre 1321 Modeling and Targeting Pancreatic Cancer, Munich, Germany; Deutsches Konsortium für Translationale Krebsforschung (DKTK) Munich Site, Munich, Germany; and
| | - Shiv K. Singh
- Department of Gastroenterology, Gastrointestinal Oncology, and Endocrinology, University Medical Centre Goettingen, Georg August University, Goettingen, Germany; Department of Surgery, Klinikum rechts der Isar, Technische Universität München, School of Medicine Munich, Munich, Germany; Sonderforschungsbereich/Collaborative Research Centre 1321 Modeling and Targeting Pancreatic Cancer, Munich, Germany; Deutsches Konsortium für Translationale Krebsforschung (DKTK) Munich Site, Munich, Germany; and
| | - Thomas M. Gress
- Department of Gastroenterology, Gastrointestinal Oncology, and Endocrinology, University Medical Centre Goettingen, Georg August University, Goettingen, Germany; Department of Surgery, Klinikum rechts der Isar, Technische Universität München, School of Medicine Munich, Munich, Germany; Sonderforschungsbereich/Collaborative Research Centre 1321 Modeling and Targeting Pancreatic Cancer, Munich, Germany; Deutsches Konsortium für Translationale Krebsforschung (DKTK) Munich Site, Munich, Germany; and
| | - Volker Ellenrieder
- Department of Gastroenterology, Gastrointestinal Oncology, and Endocrinology, University Medical Centre Goettingen, Georg August University, Goettingen, Germany; Department of Surgery, Klinikum rechts der Isar, Technische Universität München, School of Medicine Munich, Munich, Germany; Sonderforschungsbereich/Collaborative Research Centre 1321 Modeling and Targeting Pancreatic Cancer, Munich, Germany; Deutsches Konsortium für Translationale Krebsforschung (DKTK) Munich Site, Munich, Germany; and
| | - Albrecht Neesse
- Department of Gastroenterology, Gastrointestinal Oncology, and Endocrinology, University Medical Centre Goettingen, Georg August University, Goettingen, Germany; Department of Surgery, Klinikum rechts der Isar, Technische Universität München, School of Medicine Munich, Munich, Germany; Sonderforschungsbereich/Collaborative Research Centre 1321 Modeling and Targeting Pancreatic Cancer, Munich, Germany; Deutsches Konsortium für Translationale Krebsforschung (DKTK) Munich Site, Munich, Germany; and
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EGFR-mutated lung adenocarcinomas from patients who progressed on EGFR-inhibitors show high engraftment rates in xenograft models. Lung Cancer 2020; 145:144-151. [DOI: 10.1016/j.lungcan.2020.03.022] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2020] [Revised: 03/17/2020] [Accepted: 03/20/2020] [Indexed: 12/11/2022]
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9
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Roche S, O’Neill F, Murphy J, Swan N, Meiller J, Conlon NT, Geoghegan J, Conlon K, McDermott R, Rahman R, Toomey S, Straubinger NL, Straubinger RM, O’Connor R, McVey G, Moriarty M, Clynes M. Establishment and Characterisation by Expression Microarray of Patient-Derived Xenograft Panel of Human Pancreatic Adenocarcinoma Patients. Int J Mol Sci 2020; 21:ijms21030962. [PMID: 32024004 PMCID: PMC7037178 DOI: 10.3390/ijms21030962] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2019] [Revised: 01/28/2020] [Accepted: 01/29/2020] [Indexed: 12/11/2022] Open
Abstract
Pancreatic cancer remains among the most lethal cancers worldwide, with poor early detection rates and poor survival rates. Patient-derived xenograft (PDX) models have increasingly been used in preclinical and clinical research of solid cancers to fulfil unmet need. Fresh tumour samples from human pancreatic adenocarcinoma patients were implanted in severe combined immunodeficiency (SCID) mice. Samples from 78% of treatment-naïve pancreatic ductal adenocarcinoma patients grew as PDX tumours and were confirmed by histopathology. Frozen samples from F1 PDX tumours could be later successfully passaged in SCID mice to F2 PDX tumours. The human origin of the PDX was confirmed using human-specific antibodies; however, the stromal component was replaced by murine cells. Cell lines were successfully developed from three PDX tumours. RNA was extracted from eight PDX tumours and where possible, corresponding primary tumour (T) and adjacent normal tissues (N). mRNA profiles of tumour vs. F1 PDX and normal vs. tumour were compared by Affymetrix microarray analysis. Differential gene expression showed over 5000 genes changed across the N vs. T and T vs. PDX samples. Gene ontology analysis of a subset of genes demonstrated genes upregulated in normal vs. tumour vs. PDX were linked with cell cycle, cycles cell process and mitotic cell cycle. Amongst the mRNA candidates elevated in the PDX and tumour vs. normal were SERPINB5, FERMT1, AGR2, SLC6A14 and TOP2A. These genes have been associated with growth, proliferation, invasion and metastasis in pancreatic cancer previously. Cumulatively, this demonstrates the applicability of PDX models and transcriptomic array to identify genes associated with growth and proliferation of pancreatic cancer.
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Affiliation(s)
- Sandra Roche
- National Institute for Cellular Biotechnology, Dublin City University, Dublin 9, Ireland
- Correspondence:
| | - Fiona O’Neill
- National Institute for Cellular Biotechnology, Dublin City University, Dublin 9, Ireland
| | - Jean Murphy
- St. Vincent’s University Hospital, Dublin 4, Ireland
| | - Niall Swan
- St. Vincent’s University Hospital, Dublin 4, Ireland
| | - Justine Meiller
- National Institute for Cellular Biotechnology, Dublin City University, Dublin 9, Ireland
| | - Neil T. Conlon
- National Institute for Cellular Biotechnology, Dublin City University, Dublin 9, Ireland
| | | | - Kevin Conlon
- St. Vincent’s University Hospital, Dublin 4, Ireland
- Trinity College Dublin, College Green, Dublin 2, Ireland
| | - Ray McDermott
- St. Vincent’s University Hospital, Dublin 4, Ireland
| | - Rozana Rahman
- St. Vincent’s University Hospital, Dublin 4, Ireland
| | - Sinead Toomey
- Department of Molecular Medicine, Beaumont Hospital, Royal College of Surgeons in Ireland, Dublin 9, Ireland
| | - Ninfa L. Straubinger
- Department of Pharmaceutical Sciences, University at Buffalo, State University of New York, Buffalo, NY 14214, USA
| | - Robert M. Straubinger
- Department of Pharmaceutical Sciences, University at Buffalo, State University of New York, Buffalo, NY 14214, USA
| | - Robert O’Connor
- National Institute for Cellular Biotechnology, Dublin City University, Dublin 9, Ireland
| | - Gerard McVey
- St. Vincent’s University Hospital, Dublin 4, Ireland
- St Luke’s Radiation Oncology Network, Dublin 6, Ireland
| | - Michael Moriarty
- National Institute for Cellular Biotechnology, Dublin City University, Dublin 9, Ireland
- St Luke’s Radiation Oncology Network, Dublin 6, Ireland
| | - Martin Clynes
- National Institute for Cellular Biotechnology, Dublin City University, Dublin 9, Ireland
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