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Lawrence MG, Taylor RA, Cuffe GB, Ang LS, Clark AK, Goode DL, Porter LH, Le Magnen C, Navone NM, Schalken JA, Wang Y, van Weerden WM, Corey E, Isaacs JT, Nelson PS, Risbridger GP. The future of patient-derived xenografts in prostate cancer research. Nat Rev Urol 2023; 20:371-384. [PMID: 36650259 PMCID: PMC10789487 DOI: 10.1038/s41585-022-00706-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/09/2022] [Indexed: 01/19/2023]
Abstract
Patient-derived xenografts (PDXs) are generated by engrafting human tumours into mice. Serially transplantable PDXs are used to study tumour biology and test therapeutics, linking the laboratory to the clinic. Although few prostate cancer PDXs are available in large repositories, over 330 prostate cancer PDXs have been established, spanning broad clinical stages, genotypes and phenotypes. Nevertheless, more PDXs are needed to reflect patient diversity, and to study new treatments and emerging mechanisms of resistance. We can maximize the use of PDXs by exchanging models and datasets, and by depositing PDXs into biorepositories, but we must address the impediments to accessing PDXs, such as institutional, ethical and legal agreements. Through collaboration, researchers will gain greater access to PDXs representing diverse features of prostate cancer.
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Affiliation(s)
- Mitchell G Lawrence
- Department of Anatomy and Developmental Biology, Monash University, Clayton, Victoria, Australia.
- Melbourne Urological Research Alliance, Monash Biomedicine Discovery Institute, Clayton, Victoria, Australia.
- Peter MacCallum Cancer Centre, Melbourne, Victoria, Australia.
- Sir Peter MacCallum Department of Oncology, The University of Melbourne, Melbourne, Victoria, Australia.
- Cabrini Institute, Cabrini Health, Malvern, Victoria, Australia.
| | - Renea A Taylor
- Melbourne Urological Research Alliance, Monash Biomedicine Discovery Institute, Clayton, Victoria, Australia
- Peter MacCallum Cancer Centre, Melbourne, Victoria, Australia
- Sir Peter MacCallum Department of Oncology, The University of Melbourne, Melbourne, Victoria, Australia
- Cabrini Institute, Cabrini Health, Malvern, Victoria, Australia
- Department of Physiology, Monash University, Clayton, Victoria, Australia
| | - Georgia B Cuffe
- Department of Anatomy and Developmental Biology, Monash University, Clayton, Victoria, Australia
| | - Lisa S Ang
- Divisions of Human Biology and Clinical Research, Fred Hutchinson Cancer Research Center, Seattle, WA, USA
| | - Ashlee K Clark
- Department of Anatomy and Developmental Biology, Monash University, Clayton, Victoria, Australia
- Department of Urology, Radboud University Medical Center, Nijmegen, Netherlands
| | - David L Goode
- Peter MacCallum Cancer Centre, Melbourne, Victoria, Australia
- Sir Peter MacCallum Department of Oncology, The University of Melbourne, Melbourne, Victoria, Australia
| | - Laura H Porter
- Department of Anatomy and Developmental Biology, Monash University, Clayton, Victoria, Australia
| | - Clémentine Le Magnen
- Institute of Medical Genetics and Pathology, University Hospital Basel, Basel, Switzerland
- Department of Urology, University Hospital Basel, Basel, Switzerland
- Department of Biomedicine, University Hospital Basel, University of Basel, Basel, Switzerland
| | - Nora M Navone
- Department of Genitourinary Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
- David H. Koch Center for Applied Research of Genitourinary Cancers, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Jack A Schalken
- Department of Urology, Radboud University Medical Center, Nijmegen, Netherlands
| | - Yuzhuo Wang
- Vancouver Prostate Centre, Vancouver, British Columbia, Canada
- Department of Urologic Sciences, Faculty of Medicine, University of British Columbia, Vancouver, British Columbia, Canada
- Department of Experimental Therapeutics, BC Cancer Agency, Vancouver, British Columbia, Canada
| | | | - Eva Corey
- Department of Urology, University of Washington, Seattle, WA, USA
| | - John T Isaacs
- Department of Oncology, Sidney Kimmel Comprehensive Cancer Center (SKCCC), Johns Hopkins University School of Medicine, Baltimore, MD, USA
- Department of Pharmacology and Molecular Science, Johns Hopkins University School of Medicine, Baltimore, MD, USA
- Department of Urology, James Buchanan Brady Urological Institute, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Peter S Nelson
- Divisions of Human Biology and Clinical Research, Fred Hutchinson Cancer Research Center, Seattle, WA, USA
- Department of Urology, University of Washington, Seattle, WA, USA
| | - Gail P Risbridger
- Department of Anatomy and Developmental Biology, Monash University, Clayton, Victoria, Australia.
- Melbourne Urological Research Alliance, Monash Biomedicine Discovery Institute, Clayton, Victoria, Australia.
- Peter MacCallum Cancer Centre, Melbourne, Victoria, Australia.
- Sir Peter MacCallum Department of Oncology, The University of Melbourne, Melbourne, Victoria, Australia.
- Cabrini Institute, Cabrini Health, Malvern, Victoria, Australia.
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Nagai T, Terada N, Fujii M, Nagata Y, Nakahara K, Mukai S, Okasho K, Kamiyama Y, Akamatsu S, Kobayashi T, Iida K, Denawa M, Hagiwara M, Inoue T, Ogawa O, Kamoto T. Identification of the α2 chain of interleukin-13 receptor as a potential biomarker for predicting castration resistance of prostate cancer using patient-derived xenograft models. Cancer Rep (Hoboken) 2023; 6:e1701. [PMID: 36806727 PMCID: PMC9939991 DOI: 10.1002/cnr2.1701] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2022] [Revised: 06/30/2022] [Accepted: 07/31/2022] [Indexed: 11/08/2022] Open
Abstract
BACKGROUND Several treatment strategies use upfront chemotherapy or androgen receptor axis-targeting therapies for metastatic prostate cancer. However, there are no useful biomarkers for selecting appropriate patients who urgently require these treatments. METHODS Novel patient-derived xenograft (PDX) castration-sensitive and -resistant models were established and gene expression patterns were comprehensively compared. The function of a gene highly expressed in the castration-resistant models was evaluated by its overexpression in LNCaP prostate cancer cells. Protein expression in the tumors and serum of patients was examined by immunohistochemistry and ELISA, and correlations with castration resistance were analyzed. RESULTS Expression of the α2 chain of interleukin-13 receptor (IL13Rα2) was higher in castration-resistant PDX tumors. LNCaP cells overexpressing IL13Rα2 acquired castration resistance in vitro and in vivo. In tissue samples, IL13Rα2 expression levels were significantly associated with castration-resistant progression (p < 0.05). In serum samples, IL13Rα2 levels could be measured in 5 of 28 (18%) castration-resistant prostate cancer patients. CONCLUSION IL13Rα2 was highly expressed in castration-resistant prostate cancer PDX models and was associated with the castration resistance of prostate cancer cells. It might be a potential tissue and serum biomarker for predicting castration resistance in prostate cancer patients.
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Affiliation(s)
- Takahiro Nagai
- Department of UrologyMiyazaki University Graduate School of MedicineMiyazakiJapan
| | - Naoki Terada
- Department of UrologyMiyazaki University Graduate School of MedicineMiyazakiJapan
| | - Masato Fujii
- Department of UrologyMiyazaki University Graduate School of MedicineMiyazakiJapan
| | - Yasuhisa Nagata
- Department of UrologyMiyazaki University Graduate School of MedicineMiyazakiJapan
| | - Kozue Nakahara
- Department of UrologyMiyazaki University Graduate School of MedicineMiyazakiJapan
| | - Shoichiro Mukai
- Department of UrologyMiyazaki University Graduate School of MedicineMiyazakiJapan
| | - Kosuke Okasho
- Department of UrologyKyoto University Graduate School of MedicineKyotoJapan
| | - Yuki Kamiyama
- Department of UrologyKyoto University Graduate School of MedicineKyotoJapan
| | - Shusuke Akamatsu
- Department of UrologyKyoto University Graduate School of MedicineKyotoJapan
| | - Takashi Kobayashi
- Department of UrologyKyoto University Graduate School of MedicineKyotoJapan
| | - Kei Iida
- Medical Research Support Center, Graduate School of MedicineKyoto UniversityKyotoJapan
| | - Masatsugu Denawa
- Medical Research Support Center, Graduate School of MedicineKyoto UniversityKyotoJapan
| | - Masatoshi Hagiwara
- Department of Anatomy and Developmental Biology, Graduate School of MedicineKyoto UniversityKyotoJapan
| | - Takahiro Inoue
- Department of Nephro‐Urologic Surgery and AndrologyMie University Graduate School of MedicineTsuJapan
| | - Osamu Ogawa
- Department of UrologyKyoto University Graduate School of MedicineKyotoJapan
| | - Toshiyuki Kamoto
- Department of UrologyMiyazaki University Graduate School of MedicineMiyazakiJapan
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3
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Cao J, Chan WC, Chow MSS. Use of conditional reprogramming cell, patient derived xenograft and organoid for drug screening for individualized prostate cancer therapy: Current and future perspectives (Review). Int J Oncol 2022; 60:52. [PMID: 35322860 DOI: 10.3892/ijo.2022.5342] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2021] [Accepted: 01/14/2022] [Indexed: 11/06/2022] Open
Abstract
Prostate cancer mortality is ranked second among all cancer mortalities in men worldwide. There is a great need for a method of efficient drug screening for precision therapy, especially for patients with existing drug‑resistant prostate cancer. Based on the concept of bacterial cell culture and drug sensitivity testing, the traditional approach of cancer drug screening is inadequate. The current and more innovative use of cancer cell culture and in vivo tumor models in drug screening for potential individualization of anti‑cancer therapy is reviewed and discussed in the present review. An ideal screening model would have the ability to identify drug activity for the targeted cells resembling what would have occurred in the in vivo environment. Based on this principle, three available cell culture/tumor screening models for prostate cancer are reviewed and considered. The culture conditions, advantages and disadvantages for each model together with ideas to best utilize these models are discussed. The first screening model uses conditional reprogramed cells derived from patient cancer cells. Although these cells are convenient to grow and use, they are likely to have different markers and characteristics from original tumor cells and thus not likely to be informative. The second model employs patient derived xenograft (PDX) which resembles an in vivo approach, but its main disadvantages are that it cannot be easily genetically modified and it is not suitable for high‑throughput drug screening. Finally, high‑throughput screening is more feasible with tumor organoids grown from patient cancer cells. The last system still needs a large number of tumor cells. It lacks in situ blood vessels, immune cells and the extracellular matrix. Based on these current models, future establishment of an organoid data bank would allow the selection of a specific organoid resembling that of an individual's prostate cancer and used for screening of suitable anticancer drugs. This can be further confirmed using the PDX model. Thus, this combined organoid‑PDX approach is expected to be able to provide the drug sensitivity testing approach for individualization of prostate cancer therapy in the near future.
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Affiliation(s)
- Jessica Cao
- College of Osteopathic Medicine of The Pacific, Western University of Health Sciences, Pomona, CA 91766‑1854, USA
| | - Wing C Chan
- City of Hope Comprehensive Cancer Center, City of Hope Medical Center, Duarte, CA 91010‑3012, USA
| | - Moses S S Chow
- College of Pharmacy, Western University of Health Sciences, Pomona, CA 91766‑1854, USA
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Okasho K, Mizuno K, Fukui T, Lin Y, Kamiyama Y, Sunada T, Li X, Kimura H, Sumiyoshi T, Goto T, Kobayashi T, Lin D, Wang Y, Collins CC, Inoue T, Ogawa O, Akamatsu S. Establishment and characterization of a novel treatment-related neuroendocrine prostate cancer cell line KUCaP13. Cancer Sci 2021; 112:2781-2791. [PMID: 33960594 PMCID: PMC8253279 DOI: 10.1111/cas.14935] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Revised: 04/24/2021] [Accepted: 04/26/2021] [Indexed: 12/15/2022] Open
Abstract
The prevalence of neuroendocrine prostate cancer (NEPC) arising from adenocarcinoma (AC) upon potent androgen receptor (AR) pathway inhibition is increasing. Deeper understanding of NEPC biology and development of novel therapeutic agents are needed. However, research is hindered by the paucity of research models, especially cell lines developed from NEPC patients. We established a novel NEPC cell line, KUCaP13, from tissue of a patient initially diagnosed with AC which later recurred as NEPC. The cell line has been maintained permanently in vitro under regular cell culture conditions and is amenable to gene engineering with lentivirus. KUCaP13 cells lack the expression of AR and overexpress NEPC-associated genes, including SOX2, EZH2, AURKA, PEG10, POU3F2, ENO2, and FOXA2. Importantly, the cell line maintains the homozygous deletion of CHD1, which was confirmed in the primary AC of the index patient. Loss of heterozygosity of TP53 and PTEN, and an allelic loss of RB1 with a transcriptomic signature compatible with Rb pathway aberration were revealed. Knockdown of PEG10 using shRNA significantly suppressed growth in vivo. Introduction of luciferase allowed serial monitoring of cells implanted orthotopically or in the renal subcapsule. Although H3K27me was reduced by EZH2 inhibition, reversion to AC was not observed. KUCaP13 is the first patient-derived, treatment-related NEPC cell line with triple loss of tumor suppressors critical for NEPC development through lineage plasticity. It could be valuable in research to deepen the understanding of NEPC.
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MESH Headings
- Adenocarcinoma/pathology
- Animals
- Apoptosis Regulatory Proteins/genetics
- Carcinoma, Neuroendocrine/genetics
- Carcinoma, Neuroendocrine/pathology
- Carcinoma, Neuroendocrine/secondary
- Cell Line, Tumor/metabolism
- Cell Line, Tumor/pathology
- DNA Helicases/genetics
- DNA-Binding Proteins/genetics
- Drug Screening Assays, Antitumor
- Enhancer of Zeste Homolog 2 Protein/antagonists & inhibitors
- Gene Deletion
- Gene Expression
- Genes, Neoplasm
- Genes, Retinoblastoma
- Genes, Tumor Suppressor
- Genes, p53
- Genetic Engineering
- Heterografts
- Homozygote
- Humans
- Karyotyping
- Loss of Heterozygosity
- Male
- Mice, SCID
- Middle Aged
- Neoplasm Recurrence, Local/pathology
- Neoplasm Transplantation
- PTEN Phosphohydrolase/genetics
- Penile Neoplasms/genetics
- Penile Neoplasms/secondary
- Prostatic Neoplasms/genetics
- Prostatic Neoplasms/pathology
- RNA-Binding Proteins/genetics
- Receptors, Androgen
- Mice
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Affiliation(s)
- Kosuke Okasho
- Department of UrologyKyoto University Graduate School of MedicineKyotoJapan
| | - Kei Mizuno
- Department of UrologyKyoto University Graduate School of MedicineKyotoJapan
| | - Tomohiro Fukui
- Department of UrologyKyoto University Graduate School of MedicineKyotoJapan
| | - Yen‐Yi Lin
- Vancouver Prostate CentreUniversity of British ColumbiaVancouverBCCanada
| | - Yuki Kamiyama
- Department of UrologyKyoto University Graduate School of MedicineKyotoJapan
| | - Takuro Sunada
- Department of UrologyKyoto University Graduate School of MedicineKyotoJapan
| | - Xin Li
- Department of UrologyKyoto University Graduate School of MedicineKyotoJapan
| | - Hiroko Kimura
- Department of UrologyKyoto University Graduate School of MedicineKyotoJapan
| | - Takayuki Sumiyoshi
- Department of UrologyKyoto University Graduate School of MedicineKyotoJapan
| | - Takayuki Goto
- Department of UrologyKyoto University Graduate School of MedicineKyotoJapan
| | - Takashi Kobayashi
- Department of UrologyKyoto University Graduate School of MedicineKyotoJapan
| | - Dong Lin
- Department of Experimental TherapeuticsBC Cancer AgencyVancouverBCCanada
| | - Yuzhuo Wang
- Department of Experimental TherapeuticsBC Cancer AgencyVancouverBCCanada
| | - Colin C. Collins
- Vancouver Prostate CentreUniversity of British ColumbiaVancouverBCCanada
| | - Takahiro Inoue
- Department of Nephro‐Urologic SurgeryMie University Graduate School of MedicineTsuJapan
| | - Osamu Ogawa
- Department of UrologyKyoto University Graduate School of MedicineKyotoJapan
| | - Shusuke Akamatsu
- Department of UrologyKyoto University Graduate School of MedicineKyotoJapan
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5
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Wu P, Xu R, Chen X, Zhao Y, Tan D, Zhao Y, Qin W, Zhang C, Ge X, Shi C. Establishment and characterization of patient-derived xenografts for hormone-naïve and castrate-resistant prostate cancers to improve treatment modality evaluation. Aging (Albany NY) 2020; 12:3848-3861. [PMID: 32092044 PMCID: PMC7066917 DOI: 10.18632/aging.102854] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2019] [Accepted: 01/28/2020] [Indexed: 04/12/2023]
Abstract
Prostate cancer (PC) is a heterogeneous disease characterized by variable morphological patterns. Thus, establishing a patient-derived xenograft (PDX) model that retains the key features of the primary tumor for each type of PC is important for appropriate evaluation. In this study, we established PDX models of hormone-naïve (D17225) and castration-resistant (B45354) PC by implanting fresh tumor samples, obtained from patients with advanced PC under the renal capsule of immune-compromised mice. Supplementation with exogenous androgens shortened the latent period of tumorigenesis and increased the tumor formation rate. The PDX models exhibited the same major genomic and phenotypic features of the disease in humans and maintained the main pathological features of the primary tumors. Moreover, both PDX models showed different outcomes after castration or docetaxel treatment. The hormone-naïve D17225 PDX model displayed a range of responses from complete tumor regression to overt tumor progression, and the development of castrate-resistant PC was induced after castration. The responses of the two PDX models to androgen deprivation and docetaxel were similar to those observed in patients with advanced PC. These new preclinical PC models will facilitate research on the mechanisms underlying treatment response and resistance.
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Affiliation(s)
- Pengpeng Wu
- Division of Cancer Biology, Laboratory Animal Center, The Fourth Military Medical University, Xi’an, Shaanxi 710032, China
| | - Rong Xu
- Division of Cancer Biology, Laboratory Animal Center, The Fourth Military Medical University, Xi’an, Shaanxi 710032, China
| | - Xue Chen
- Division of Cancer Biology, Laboratory Animal Center, The Fourth Military Medical University, Xi’an, Shaanxi 710032, China
| | - Ya Zhao
- Division of Cancer Biology, Laboratory Animal Center, The Fourth Military Medical University, Xi’an, Shaanxi 710032, China
- Biomedicine Application Laboratory, School of Life Science and Technology, Xidian University, Xi’an, Shaanxi 710071, China
| | - Dengxu Tan
- Division of Cancer Biology, Laboratory Animal Center, The Fourth Military Medical University, Xi’an, Shaanxi 710032, China
| | - Yong Zhao
- Division of Cancer Biology, Laboratory Animal Center, The Fourth Military Medical University, Xi’an, Shaanxi 710032, China
| | - Weijun Qin
- Department of Urology, Xijing Hospital, Fourth Military Medical University, Xi’an, Shaanxi 710032, China
| | - Caiqin Zhang
- Division of Cancer Biology, Laboratory Animal Center, The Fourth Military Medical University, Xi’an, Shaanxi 710032, China
| | - Xu Ge
- Division of Cancer Biology, Laboratory Animal Center, The Fourth Military Medical University, Xi’an, Shaanxi 710032, China
| | - Changhong Shi
- Division of Cancer Biology, Laboratory Animal Center, The Fourth Military Medical University, Xi’an, Shaanxi 710032, China
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Shi C, Chen X, Tan D. Development of patient-derived xenograft models of prostate cancer for maintaining tumor heterogeneity. Transl Androl Urol 2019; 8:519-528. [PMID: 31807428 DOI: 10.21037/tau.2019.08.31] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
Prostate cancer (Pca) is a heterogeneous disease with multiple morphological patterns. Thus, the establishment of a patient-derived xenograft (PDX) model that retains key features of the primary tumor is of great significance. This review demonstrates the characteristics and advantages of the Pca PDX model and summarizes the main factors affecting the establishment of the model. Because this model well recapitulates the diverse heterogeneity observed in the clinic, it was extensively utilized to discover new therapeutic targets, screen drugs, and explore metastatic mechanisms. In the future, clinical phenotype and different stages of the Pca patient might be faithfully reflected by PDX model, which provides tremendous potential for understanding Pca biology and achieving individualized treatment.
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Affiliation(s)
- Changhong Shi
- Division of Cancer Biology, Laboratory Animal Center, the Fourth Military Medical University, Xi'an 710032, China.,School of Basic Medical Sciences, the Chengdu Medical University, Xindu 610500, China
| | - Xue Chen
- Division of Cancer Biology, Laboratory Animal Center, the Fourth Military Medical University, Xi'an 710032, China.,School of Basic Medical Sciences, the Chengdu Medical University, Xindu 610500, China
| | - Dengxu Tan
- Division of Cancer Biology, Laboratory Animal Center, the Fourth Military Medical University, Xi'an 710032, China
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7
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Patient-Derived Xenograft Models of Breast Cancer and Their Application. Cells 2019; 8:cells8060621. [PMID: 31226846 PMCID: PMC6628218 DOI: 10.3390/cells8060621] [Citation(s) in RCA: 84] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2019] [Revised: 06/06/2019] [Accepted: 06/18/2019] [Indexed: 02/06/2023] Open
Abstract
Recently, patient-derived xenograft (PDX) models of many types of tumors including breast cancer have emerged as a powerful tool for predicting drug efficacy and for understanding tumor characteristics. PDXs are established by the direct transfer of human tumors into highly immunodeficient mice and then maintained by passaging from mouse to mouse. The ability of PDX models to maintain the original features of patient tumors and to reflect drug sensitivity has greatly improved both basic and clinical study outcomes. However, current PDX models cannot completely predict drug efficacy because they do not recapitulate the tumor microenvironment of origin, a failure which puts emphasis on the necessity for the development of the next generation PDX models. In this article, we summarize the advantages and limitations of current PDX models and discuss the future directions of this field.
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Collins AT, Lang SH. A systematic review of the validity of patient derived xenograft (PDX) models: the implications for translational research and personalised medicine. PeerJ 2018; 6:e5981. [PMID: 30498642 PMCID: PMC6252062 DOI: 10.7717/peerj.5981] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2018] [Accepted: 10/22/2018] [Indexed: 01/11/2023] Open
Abstract
Patient-derived xenograft (PDX) models are increasingly being used in oncology drug development because they offer greater predictive value than traditional cell line models. Using novel tools to critique model validity and reliability we performed a systematic review to identify all original publications describing the derivation of PDX models of colon, prostate, breast and lung cancer. Validity was defined as the ability to recapitulate the disease of interest. The study protocol was registered with the Collaborative Approach to Meta-Analysis and Review of Animal Data from Experimental Studies (CAMARADES). Searches were performed in Embase, MEDLINE and Pubmed up to July 2017. A narrative data synthesis was performed. We identified 105 studies of model validations; 29 for breast, 29 for colon, 25 for lung, 23 for prostate and 4 for multiple tissues. 133 studies were excluded because they did not perform any validation experiments despite deriving a PDX. Only one study reported following the ARRIVE guidelines; developed to improve the standard of reporting for animal experimentation. Remarkably, half of all breast (52%) and prostate (50%) studies were judged to have high concern, in contrast to 16% of colon and 28% of lung studies. The validation criteria that most commonly failed (evidence to the contrary) were: tissue of origin not proven and histology of the xenograft not comparable to the parental tumour. Overall, most studies were categorized as unclear because one or more validation conditions were not reported, or researchers failed to provide data for a proportion of their models. For example, failure to demonstrate tissue of origin, response to standard of care agents and to exclude development of lymphoma. Validation tools have the potential to improve reproducibility, reduce waste in research and increase the success of translational studies.
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Affiliation(s)
- Anne T. Collins
- Department of Biology, University of York, York, United Kingdom
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9
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Inoue T, Terada N, Kobayashi T, Ogawa O. Patient-derived xenografts as in vivo models for research in urological malignancies. Nat Rev Urol 2017; 14:267-283. [PMID: 28248952 DOI: 10.1038/nrurol.2017.19] [Citation(s) in RCA: 57] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Lack of appropriate models that recapitulate the complexity and heterogeneity of urological tumours precludes most of the preclinical reagents that target urological tumours from receiving regulatory approval. Patient-derived xenograft (PDX) models are characterized by direct engraftment of patient-derived tumour fragments into immunocompromised mice. PDXs can maintain the original histology, as well as the molecular and genetic characteristics of the source tumour. Thus, PDX models have various advantages over conventional cell-line-derived xenograft (CDX) and other models, which has resulted in an increase in the use of urological tumour PDXs in the analysis of tumour biology and, importantly, for drug development and treatment decisions in personalized medicine. PDX models of urological malignancies have great potential to be used for both basic and clinical research, but limitations exist and need to be overcome. In particular, several agents targeting the immune system have shown promising results in kidney and bladder cancer; however, establishing PDX models in mice with an intact immune system so that an immune response against the tumour is triggered is important to investigate these new therapeutics. Moreover, international collaboration to share PDX models is essential for research concerning fatal urological tumours.
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Affiliation(s)
- Takahiro Inoue
- Department of Urology, Kyoto University Graduate School of Medicine, 54 Kawaharacho Shogoin Sakyo-ku, Kyoto, 6068507, Japan
| | - Naoki Terada
- Department of Urology, Kyoto University Graduate School of Medicine, 54 Kawaharacho Shogoin Sakyo-ku, Kyoto, 6068507, Japan
| | - Takashi Kobayashi
- Department of Urology, Kyoto University Graduate School of Medicine, 54 Kawaharacho Shogoin Sakyo-ku, Kyoto, 6068507, Japan
| | - Osamu Ogawa
- Department of Urology, Kyoto University Graduate School of Medicine, 54 Kawaharacho Shogoin Sakyo-ku, Kyoto, 6068507, Japan
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