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Chen M, Li H, Xu X, Bao X, Xue L, Ai X, Xu J, Xu M, Shi Y, Zhen T, Li J, Yang Y, Ji Y, Fu Z, Xing K, Qing T, Wang Q, Zhong P, Zhu S. Identification of RAC1 in promoting brain metastasis of lung adenocarcinoma using single-cell transcriptome sequencing. Cell Death Dis 2023; 14:330. [PMID: 37202394 DOI: 10.1038/s41419-023-05823-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2022] [Revised: 04/20/2023] [Accepted: 04/21/2023] [Indexed: 05/20/2023]
Abstract
This study aims to give a new perspective to the biomarkers in the lung adenocarcinoma (LUAD) brain metastasis, pathways involved and potential therapeutics. We performed a comprehensive single-cell level transcriptomic analysis on one LUAD patient with circulating tumor cells (CTCs), primary tumor tissue and metastatic tumor tissue using scRNA-seq approach to identify metastasis related biomarkers. Further scRNA-seq were performed on 7 patients to validate the cancer metastatic hallmark. with single cells collected from either metastatic or primary LUAD tissues. Pathological and functional studies were also performed to evidence the critical role of RAC1 in the LUAD metastasis. Hallmark gene was verified based on immunohistochemistry staining, cytological experiment, survival information from The Cancer Genome Atlas (TCGA), and staining results from Human Protein Atlas (HPA) databases. PCA analysis revealed that CTCs were in the intermediate place between the metastatic group and primary group. In the unsupervised clustering analysis CTCs were closer to one of the metastatic tumor cells, implying heterogeneity of the metastatic tumor and origin of the CTCs were from metastatic site. Transitional phase related gene analysis identified RAC1 was enriched in metastatic tumor tissue (MTT) preferred gene set functioning as regulated cell death and apoptosis as well as promoted macromolecule organization. Compared with normal tissue, expression levels of RAC1 increased significantly in LUAD tissue based on HPA database. High expression of RAC1 predicts worse prognosis and higher-risk. EMT analysis identified the propensity of mesenchymal state in primary cells while epithelial signals were higher in the metastatic site. Functional clustering and pathway analyses suggested genes in RAC1 highly expressed cells played critical roles in adhesion, ECM and VEGF signaling pathways. Inhibition of RAC1 attenuates the proliferation, invasiveness and migration ability of lung cancer cells. Besides, through MRI T2WI results, we proved that RAC1 can promote brain metastasis in the RAC1-overexpressed H1975 cell burden nude mouse model. RAC1 and its mechanisms might promote drug design against LUAD brain metastasis.
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Affiliation(s)
- Mingyu Chen
- Department of Neurosurgery, Huashan Hospital, Shanghai Medical College, Fudan University, 200040, Shanghai, China
- School of Life Sciences, Fudan University, 200438, Shanghai, China
- Research Unit of New Technologies of Micro-Endoscopy Combination in Skull Base Surgery (2018RU008), Chinese Academy of Medical Sciences, Beijing, China
- Neurosurgical Institute of Fudan University, Shanghai, China
- Shanghai Clinical Medical Center of Neurosurgery, Shanghai, China
- Shanghai Key Laboratory of Brain Function Restoration and Neural Regeneration, Shanghai, China
| | - Hanyue Li
- Department of Lung Tumor Clinical Center, Shanghai Chest Hospital, Shanghai Jiaotong University, 200030, Shanghai, China
| | - Xiaolin Xu
- Department of Cardiothoracic Surgery, Third Affiliated Hospital of Naval Military Medical University, 200003, Shanghai, China
- Department of Thoracic Surgery, Shanghai Pulmonary Hospital, Tongji University, 507 Zhengmin Road, Shanghai, PR China
| | - Xunxia Bao
- School of Life Science, Anhui Medical University, 230032, Hefei, China
| | - Lei Xue
- Department of Thoracic Surgery, Shanghai Changzheng Hospital, Second Affiliated Hospital of Naval Military Medical University, 200003, Shanghai, China
| | - Xinghao Ai
- Department of Lung Tumor Clinical Center, Shanghai Chest Hospital, Shanghai Jiaotong University, 200030, Shanghai, China
| | - Jian Xu
- Department of Neurosurgery, Huashan Hospital, Shanghai Medical College, Fudan University, 200040, Shanghai, China
- School of Life Sciences, Fudan University, 200438, Shanghai, China
- Research Unit of New Technologies of Micro-Endoscopy Combination in Skull Base Surgery (2018RU008), Chinese Academy of Medical Sciences, Beijing, China
- Neurosurgical Institute of Fudan University, Shanghai, China
- Shanghai Clinical Medical Center of Neurosurgery, Shanghai, China
- Shanghai Key Laboratory of Brain Function Restoration and Neural Regeneration, Shanghai, China
| | - Ming Xu
- Department of Neurosurgery, Huashan Hospital, Shanghai Medical College, Fudan University, 200040, Shanghai, China
- School of Life Sciences, Fudan University, 200438, Shanghai, China
- Research Unit of New Technologies of Micro-Endoscopy Combination in Skull Base Surgery (2018RU008), Chinese Academy of Medical Sciences, Beijing, China
- Neurosurgical Institute of Fudan University, Shanghai, China
- Shanghai Clinical Medical Center of Neurosurgery, Shanghai, China
- Shanghai Key Laboratory of Brain Function Restoration and Neural Regeneration, Shanghai, China
| | - Yong Shi
- Cinoasia Institute, 200438, Shanghai, China
| | | | - Jie Li
- Cinoasia Institute, 200438, Shanghai, China
| | - Yi Yang
- Cinoasia Institute, 200438, Shanghai, China
| | - Yang Ji
- Cinoasia Institute, 200438, Shanghai, China
| | | | | | - Tao Qing
- Cinoasia Institute, 200438, Shanghai, China
| | - Qiubo Wang
- Department of Clinical Laboratory, Wuxi 9th People's Hospital Affiliated to Soochow University, 214000, Wuxi, Jiangsu, China.
| | - Ping Zhong
- Department of Neurosurgery, Huashan Hospital, Shanghai Medical College, Fudan University, 200040, Shanghai, China.
- School of Life Sciences, Fudan University, 200438, Shanghai, China.
- Research Unit of New Technologies of Micro-Endoscopy Combination in Skull Base Surgery (2018RU008), Chinese Academy of Medical Sciences, Beijing, China.
- Neurosurgical Institute of Fudan University, Shanghai, China.
- Shanghai Clinical Medical Center of Neurosurgery, Shanghai, China.
- Shanghai Key Laboratory of Brain Function Restoration and Neural Regeneration, Shanghai, China.
| | - Sibo Zhu
- Department of Neurosurgery, Huashan Hospital, Shanghai Medical College, Fudan University, 200040, Shanghai, China.
- School of Life Sciences, Fudan University, 200438, Shanghai, China.
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Circulating Tumor Cells in Breast Cancer Patients: A Balancing Act between Stemness, EMT Features and DNA Damage Responses. Cancers (Basel) 2022; 14:cancers14040997. [PMID: 35205744 PMCID: PMC8869884 DOI: 10.3390/cancers14040997] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2022] [Revised: 02/11/2022] [Accepted: 02/13/2022] [Indexed: 02/04/2023] Open
Abstract
Circulating tumor cells (CTCs) traverse vessels to travel from the primary tumor to distant organs where they adhere, transmigrate, and seed metastases. To cope with these challenges, CTCs have reached maximal flexibility to change their differentiation status, morphology, migratory capacity, and their responses to genotoxic stress caused by metabolic changes, hormones, the inflammatory environment, or cytostatic treatment. A significant percentage of breast cancer cells are defective in homologous recombination repair and other mechanisms that protect the integrity of the replication fork. To prevent cell death caused by broken forks, alternative, mutagenic repair, and bypass pathways are engaged but these increase genomic instability. CTCs, arising from such breast tumors, are endowed with an even larger toolbox of escape mechanisms that can be switched on and off at different stages during their journey according to the stress stimulus. Accumulating evidence suggests that DNA damage responses, DNA repair, and replication are integral parts of a regulatory network orchestrating the plasticity of stemness features and transitions between epithelial and mesenchymal states in CTCs. This review summarizes the published information on these regulatory circuits of relevance for the design of biomarkers reflecting CTC functions in real-time to monitor therapeutic responses and detect evolving chemoresistance mechanisms.
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Walters K, Stornetta A, Jacobs F, Villalta PW, Razzoli M, Grant M, Zordoky B, Bartolomucci A, Borgatti A, Balbo S. Identification of new candidate biomarkers to support doxorubicin treatments in canine cancer patients. BMC Vet Res 2021; 17:378. [PMID: 34876121 PMCID: PMC8650425 DOI: 10.1186/s12917-021-03062-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Accepted: 10/13/2021] [Indexed: 11/10/2022] Open
Abstract
Background Both human and veterinary cancer chemotherapy are undergoing a paradigm shift from a “one size fits all” approach to more personalized, patient-oriented treatment strategies. Personalized chemotherapy is dependent on the identification and validation of biomarkers that can predict treatment outcome and/or risk of toxicity. Many cytotoxic chemotherapy agents, including doxorubicin, base their mechanism of action by interaction with DNA and disruption of normal cellular processes. We developed a high-resolution/accurate-mass liquid chromatography-mass spectrometry DNA screening approach for monitoring doxorubicin-induced DNA modifications (adducts) in vitro and in vivo. We used, for the first time, a new strategy involving the use of isotope-labeled DNA, which greatly facilitates adduct discovery. The overall goal of this work was to identify doxorubicin-DNA adducts to be used as biomarkers to predict drug efficacy for use in veterinary oncology. Results We used our novel mass spectrometry approach to screen for adducts in purified DNA exposed to doxorubicin. This initial in vitro screening identified nine potential doxorubicin-DNA adduct masses, as well as an intense signal corresponding to DNA-intercalated doxorubicin. Two of the adduct masses, together with doxorubicin and its metabolite doxorubicinol, were subsequently detected in vivo in liver DNA extracted from mice exposed to doxorubicin. Finally, the presence of these adducts and analytes was explored in the DNA isolated from dogs undergoing treatment with doxorubicin. The previously identified nine DOX-DNA adducts were not detected in these preliminary three samples collected seven days post-treatment, however intercalated doxorubicin and doxorubicinol were detected. Conclusions This work sets the stage for future evaluation of doxorubicin-DNA adducts and doxorubicin-related molecules as candidate biomarkers to personalize chemotherapy protocols for canine cancer patients. It demonstrates our ability to combine in one method the analysis of DNA adducts and DNA-intercalated doxorubicin and doxorubicinol. The last two analytes interestingly, were persistent in samples from canine patients undergoing doxorubicin chemotherapy seven days after treatment. The presence of doxorubicin in all samples suggests a role for it as a promising biomarker for use in veterinary chemotherapy. Future studies will involve the analysis of more samples from canine cancer patients to elucidate optimal timepoints for monitoring intercalated doxorubicin and doxorubicin-DNA adducts and the correlation of these markers with therapy outcome. Supplementary Information The online version contains supplementary material available at 10.1186/s12917-021-03062-x.
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Affiliation(s)
- Kristine Walters
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, University of Minnesota, 1365 Gortner Avenue, St Paul, MN, 55108, USA.,WestVet 24/7 Animal Emergency & Specialty Center, 5024 W Chinden Boulevard, Garden City, ID, 83714, USA
| | - Alessia Stornetta
- Masonic Cancer Center, University of Minnesota, 2231 6th Street Southeast, Minneapolis, MN, 55455, USA
| | - Foster Jacobs
- Masonic Cancer Center, University of Minnesota, 2231 6th Street Southeast, Minneapolis, MN, 55455, USA.,Division of Environmental Health Sciences, School of Public Health, University of Minnesota, 420 Delaware Street SE, Minneapolis, MN, 55455, USA
| | - Peter W Villalta
- Masonic Cancer Center, University of Minnesota, 2231 6th Street Southeast, Minneapolis, MN, 55455, USA
| | - Maria Razzoli
- Department of Integrative Biology and Physiology, University of Minnesota, 2231 6th Street SE, Minneapolis, MN, 55455, USA
| | - Marianne Grant
- Department of Experimental and Clinical Pharmacology, College of Pharmacy, University of Minnesota, 308 Harvard Street S.E, Minneapolis, MN, 55455, USA
| | - Beshay Zordoky
- Department of Experimental and Clinical Pharmacology, College of Pharmacy, University of Minnesota, 308 Harvard Street S.E, Minneapolis, MN, 55455, USA
| | - Alessandro Bartolomucci
- Department of Integrative Biology and Physiology, University of Minnesota, 2231 6th Street SE, Minneapolis, MN, 55455, USA
| | - Antonella Borgatti
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, University of Minnesota, 1365 Gortner Avenue, St Paul, MN, 55108, USA.,Masonic Cancer Center, University of Minnesota, 2231 6th Street Southeast, Minneapolis, MN, 55455, USA.,Clinical Investigation Center, College of Veterinary Medicine, St. Paul, MN, 55108, USA
| | - Silvia Balbo
- Masonic Cancer Center, University of Minnesota, 2231 6th Street Southeast, Minneapolis, MN, 55455, USA. .,Division of Environmental Health Sciences, School of Public Health, University of Minnesota, 420 Delaware Street SE, Minneapolis, MN, 55455, USA.
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Detection of doxorubicin, cisplatin and therapeutic antibodies in formalin-fixed paraffin-embedded human cancer cells. Histochem Cell Biol 2020; 153:367-377. [PMID: 32125512 PMCID: PMC7225197 DOI: 10.1007/s00418-020-01857-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/19/2020] [Indexed: 11/27/2022]
Abstract
A major limitation in the pharmacological treatment of clinically detectable primary cancers and their metastases is their limited accessibility to anti-cancer drugs (cytostatics, inhibitory antibodies, small-molecule inhibitors) critically impairing therapeutic efficacies. Investigations on the tissue distribution of such drugs are rare and have only been based on fresh frozen material or methanol-fixed cell culture cells so far. In this paper, we expand the detection of cisplatin-induced DNA adducts and anthracyclines as well as therapeutic antibodies to routinely prepared formalin-fixed, paraffin-embedded sections (FFPE). Using pre-treated cell lines prepared as FFPE samples comparable to tissues from routine analysis, we demonstrate that our method allows for the detection of chemotherapeutics (anthracyclines by autofluorescence, cisplatin by immune detection of DNA adducts) as well as therapeutic antibodies. This methodology thus allows for analyzing archival FFPE tissues, as demonstrated here for the detection of cisplatin, doxorubicin and trastuzumab in FFPE sections of tumor xenografts from drug-treated mice. Analyzing human tumor samples, this will lead to new insights into the tissue penetration of drugs.
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Bartelink IH, Jones EF, Shahidi‐Latham SK, Lee PRE, Zheng Y, Vicini P, van ‘t Veer L, Wolf D, Iagaru A, Kroetz DL, Prideaux B, Cilliers C, Thurber GM, Wimana Z, Gebhart G. Tumor Drug Penetration Measurements Could Be the Neglected Piece of the Personalized Cancer Treatment Puzzle. Clin Pharmacol Ther 2019; 106:148-163. [PMID: 30107040 PMCID: PMC6617978 DOI: 10.1002/cpt.1211] [Citation(s) in RCA: 52] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2018] [Accepted: 07/30/2018] [Indexed: 12/30/2022]
Abstract
Precision medicine aims to use patient genomic, epigenomic, specific drug dose, and other data to define disease patterns that may potentially lead to an improved treatment outcome. Personalized dosing regimens based on tumor drug penetration can play a critical role in this approach. State-of-the-art techniques to measure tumor drug penetration focus on systemic exposure, tissue penetration, cellular or molecular engagement, and expression of pharmacological activity. Using in silico methods, this information can be integrated to bridge the gap between the therapeutic regimen and the pharmacological link with clinical outcome. These methodologies are described, and challenges ahead are discussed. Supported by many examples, this review shows how the combination of these techniques provides enhanced patient-specific information on drug accessibility at the tumor tissue level, target binding, and downstream pharmacology. Our vision of how to apply tumor drug penetration measurements offers a roadmap for the clinical implementation of precision dosing.
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Affiliation(s)
- Imke H. Bartelink
- Department of MedicineUniversity of California, San FranciscoSan FranciscoCaliforniaUSA
- Clinical Pharmacology, Pharmacometrics and DMPK (CPD)MedImmuneSouth San FranciscoCaliforniaUSA
- Department of Clinical Pharmacology and PharmacyAmsterdam UMCVrije Universiteit AmsterdamThe Netherlands
| | - Ella F. Jones
- Department of Radiology and Biomedical ImagingUniversity of California, San FranciscoSan FranciscoCaliforniaUSA
| | | | - Pei Rong Evelyn Lee
- Department of Laboratory Medicine of the UCSF Helen Diller Family Comprehensive Cancer CenterUniversity of California, San FranciscoSan FranciscoCaliforniaUSA
| | - Yanan Zheng
- Clinical Pharmacology, Pharmacometrics and DMPK (CPD)MedImmuneSouth San FranciscoCaliforniaUSA
| | - Paolo Vicini
- Clinical Pharmacology, Pharmacometrics and DMPK (CPD)MedImmuneCambridgeUK
| | - Laura van ‘t Veer
- Department of Laboratory Medicine of the UCSF Helen Diller Family Comprehensive Cancer CenterUniversity of California, San FranciscoSan FranciscoCaliforniaUSA
| | - Denise Wolf
- Department of Laboratory Medicine of the UCSF Helen Diller Family Comprehensive Cancer CenterUniversity of California, San FranciscoSan FranciscoCaliforniaUSA
| | - Andrei Iagaru
- Division of Nuclear Medicine and Molecular Imaging at Stanford Health CareStanfordCaliforniaUSA
| | - Deanna L. Kroetz
- Department of Bioengineering and Therapeutic Sciences (BTS)School of PharmacyUniversity of California, San FranciscoSan FranciscoCaliforniaUSA
| | - Brendan Prideaux
- Rutgers New Jersey Medical SchoolPublic Health Research InstituteRutgers, The State University of New JerseyNew BrunswickNew JerseyUSA
| | - Cornelius Cilliers
- Departments of Chemical Engineering and Biomedical EngineeringUniversity of MichiganAnn ArborMichiganUSA
| | - Greg M. Thurber
- Departments of Chemical Engineering and Biomedical EngineeringUniversity of MichiganAnn ArborMichiganUSA
| | - Zena Wimana
- Institut Jules BordetUniversité Libre de Bruxelles (ULB)BrusselsBelgium
| | - Geraldine Gebhart
- Institut Jules BordetUniversité Libre de Bruxelles (ULB)BrusselsBelgium
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6
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Melnikova M, Thomale J. Visualization and Quantitative Measurement of Drug-Induced Platinum Adducts in the Nuclear DNA of Individual Cells by an Immuno-Cytological Assay. Methods Mol Biol 2018; 1655:351-358. [PMID: 28889396 DOI: 10.1007/978-1-4939-7234-0_24] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Immunocytological staining with adduct-specific antibodies allows the visualization and measurement of structurally defined types of DNA damage in the nuclei of individual cells. Here we describe an immunocytological assay (ICA) procedure for the localization and quantification of such damage, in particular induced by platinum-based anticancer drugs, in cell lines , in primary cell suspensions and in frozen tissue sections.
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Affiliation(s)
- Margarita Melnikova
- Institute of Cell Biology (Cancer Research), University of Duisburg-Essen Medical School, Hufelandstr. 55, 45122, Essen, Germany
| | - Jürgen Thomale
- Institute of Cell Biology (Cancer Research), University of Duisburg-Essen Medical School, Hufelandstr. 55, 45122, Essen, Germany.
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ERCC1-expressing circulating tumor cells as a potential diagnostic tool for monitoring response to platinum-based chemotherapy and for predicting post-therapeutic outcome of ovarian cancer. Oncotarget 2018; 8:24303-24313. [PMID: 28388557 PMCID: PMC5421848 DOI: 10.18632/oncotarget.13286] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2016] [Accepted: 10/13/2016] [Indexed: 11/25/2022] Open
Abstract
Background We recently showed that the presence of ERCC1+CTCs is an independent predictive biomarker for platinum-resistance and poor prognosis of ovarian cancer. The goal of our current research was to determine how the auxiliary assessment of ERCC1-transcripts influences overall CTC-detection rate. We extended this investigation from an initially predictive setting to paired pre- and post-therapeutic blood analysis in order to see, whether ERCC1+CTCs dynamics mirror response to chemotherapy. Methods 65 Paired blood samples (10ml) of primary ovarian cancer patients at primary diagnosis and after chemotherapy were studied for CTCs with the AdnaTest Ovarian Cancer (QIAGEN Hannover GmbH). We analyzed the tumor-associated transcripts EpCAM, MUC-1 and CA-125. ERCC1-transcripts were investigated in a separate approach by singleplex RT-PCR. RESULTS Auxiliary assessment of ERCC1-transcripts enhanced the overall CTC-detection rate up to 17%. ERCC1+CTCs (defined as positive for one of the AdnaTest markers plus ERCC1-positivity) were detected in 15% of patients at primary diagnosis and in 12% after chemotherapy. The presence of ERCC1+CTCs after chemotherapy correlated with platinum-resistance (P=0.01), reduced PFS (P=0.0293) and OS (P=0.0008) and their persistence indicated poor post-therapeutic outcome (PFS: P=0.005; OS: P=0.0058). Interestingly, the assessment of ERCC1-transcripts alone was sufficient for the detection of prognostic relevant ERCC1-expressing CTCs. Conclusion Auxiliary assessment of ERCC1-transcripts expands the phenotypic spectrum of CTC detection and defines an additional overlapping fraction of ERCC1-expressing CTCs, which are potentially selected by platinum-based chemotherapy. Specifically, we suggest that ERCC1+CTCs could additionally be useful as a surrogate for monitoring platinum-based chemotherapy and to assess the post-therapeutic outcome of ovarian cancer.
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Ruhe L, Ickert S, Hochkirch U, Hofmann J, Beck S, Thomale J, Linscheid MW. Comprehensive Molecular Characterization of a Cisplatin-Specific Monoclonal Antibody. Mol Pharm 2017; 14:4454-4461. [PMID: 29129076 DOI: 10.1021/acs.molpharmaceut.7b00575] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Despite their immense and rapidly increasing importance as analytical tools or therapeutic drugs, the detailed structural features of particular monoclonal antibodies are widely unknown. Here, an antibody already in use for diagnostic purposes and for molecular dosimetry studies in cancer therapy with very high affinity and specificity for cisplatin-induced DNA modifications was studied extensively. The molecular structure and modifications as well as the antigen specificity were investigated mainly by mass spectrometry. Using nano electrospray ionization mass spectrometry, it was possible to characterize the antibody in its native state. Tandem-MS experiments not only revealed specific fragments but also gave information on the molecular structure. The detailed primary structure was further elucidated by proteolytic treatment with a selection of enzymes and high resolution tandem-MS. The data were validated by comparison with known antibody sequences. Then, the complex glycan structures bound to the antibody were characterized in all detail. The Fc-bound oligosaccharides were released enzymatically and studied by matrix-assisted laser desorption/ionization mass spectrometry. Overall 16 different major glycan structures were identified. The binding specificity of the antibody was investigated by applying synthetic single and double stranded DNA oligomers harboring distinct Pt adducts. The antibody-antigen complexes were analyzed by mass spectrometry under native conditions. The stability of the complex with double stranded DNA was also investigated.
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Affiliation(s)
- Lena Ruhe
- Department of Chemistry, Humboldt-Universitaet zu Berlin , Brook-Taylor-Strasse 2, 12489 Berlin, Germany
| | - Stefanie Ickert
- Department of Chemistry, Humboldt-Universitaet zu Berlin , Brook-Taylor-Strasse 2, 12489 Berlin, Germany.,Federal Institute for Materials Research and Testing , Richard-Willstaetter-Strasse 11, 12489 Berlin, Germany
| | - Ulrike Hochkirch
- Department of Chemistry, Humboldt-Universitaet zu Berlin , Brook-Taylor-Strasse 2, 12489 Berlin, Germany
| | - Johanna Hofmann
- Fritz Haber Institute of the Max Planck Society , Faradayweg 4-6, 14195 Berlin, Germany
| | - Sebastian Beck
- Department of Chemistry, Humboldt-Universitaet zu Berlin , Brook-Taylor-Strasse 2, 12489 Berlin, Germany
| | - Jürgen Thomale
- Department of Cell Biology, Universitaetsklinikum Essen , Hufelandstrasse 55, 45122 Essen, Germany
| | - Michael W Linscheid
- Department of Chemistry, Humboldt-Universitaet zu Berlin , Brook-Taylor-Strasse 2, 12489 Berlin, Germany
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Bartelink IH, Prideaux B, Krings G, Wilmes L, Lee PRE, Bo P, Hann B, Coppé JP, Heditsian D, Swigart-Brown L, Jones EF, Magnitsky S, Keizer RJ, de Vries N, Rosing H, Pawlowska N, Thomas S, Dhawan M, Aggarwal R, Munster PN, Esserman LJ, Ruan W, Wu AHB, Yee D, Dartois V, Savic RM, Wolf DM, van ’t Veer L. Heterogeneous drug penetrance of veliparib and carboplatin measured in triple negative breast tumors. Breast Cancer Res 2017; 19:107. [PMID: 28893315 PMCID: PMC5594551 DOI: 10.1186/s13058-017-0896-4] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2017] [Accepted: 08/14/2017] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Poly(ADP-ribose) polymerase inhibitors (PARPi), coupled to a DNA damaging agent is a promising approach to treating triple negative breast cancer (TNBC). However, not all patients respond; we hypothesize that non-response in some patients may be due to insufficient drug penetration. As a first step to testing this hypothesis, we quantified and visualized veliparib and carboplatin penetration in mouse xenograft TNBCs and patient blood samples. METHODS MDA-MB-231, HCC70 or MDA-MB-436 human TNBC cells were implanted in 41 beige SCID mice. Low dose (20 mg/kg) or high dose (60 mg/kg) veliparib was given three times daily for three days, with carboplatin (60 mg/kg) administered twice. In addition, blood samples were analyzed from 19 patients from a phase 1 study of carboplatin + PARPi talazoparib. Veliparib and carboplatin was quantified using liquid chromatography-mass spectrometry (LC-MS). Veliparib tissue penetration was visualized using matrix-assisted laser desorption/ionization mass spectrometric imaging (MALDI-MSI) and platinum adducts (covalent nuclear DNA-binding) were quantified using inductively coupled plasma-mass spectrometry (ICP-MS). Pharmacokinetic modeling and Pearson's correlation were used to explore associations between concentrations in plasma, tumor cells and peripheral blood mononuclear cells (PBMCs). RESULTS Veliparib penetration in xenograft tumors was highly heterogeneous between and within tumors. Only 35% (CI 95% 26-44%), 74% (40-97%) and 46% (9-37%) of veliparib observed in plasma penetrated into MDA-MB-231, HCC70 and MDA-MB-436 cell-based xenografts, respectively. Within tumors, penetration heterogeneity was larger with the 60 mg/kg compared to the 20 mg/kg dose (RSD 155% versus 255%, P = 0.001). These tumor concentrations were predicted similar to clinical dosing levels, but predicted tumor concentrations were below half maximal concentration values as threshold of response. Xenograft veliparib concentrations correlated positively with platinum adduct formation (R 2 = 0.657), but no PARPi-platinum interaction was observed in patients' PBMCs. Platinum adduct formation was significantly higher in five gBRCA carriers (ratio of platinum in DNA in PBMCs/plasma 0.64% (IQR 0.60-1.16%) compared to nine non-carriers (ratio 0.29% (IQR 0.21-0.66%, P < 0.0001). CONCLUSIONS PARPi/platinum tumor penetration can be measured by MALDI-MSI and ICP-MS in PBMCs and fresh frozen, OCT embedded core needle biopsies. Large variability in platinum adduct formation and spatial heterogeneity in veliparib distribution may lead to insufficient drug exposure in select cell populations.
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Affiliation(s)
- Imke H. Bartelink
- Department of Medicine, University of California San Francisco, 2340 Sutter Street, San Francisco, CA 9411 USA
| | - Brendan Prideaux
- Rutgers New Jersey Medical School, Public Health Research Institute, Rutgers, The State University of New Jersey, 225 Warren Ave, Newark, NJ USA
| | - Gregor Krings
- Department of Pathology, University of California, San Francisco, CA USA
| | - Lisa Wilmes
- Department of Radiology and Biomedical Imaging, University of California, San Francisco, CA USA
| | - Pei Rong Evelyn Lee
- Department of Laboratory Medicine, UCSF Helen Diller Family Comprehensive Cancer Center, San Francisco, CA USA
| | - Pan Bo
- Department of Laboratory Medicine, UCSF Helen Diller Family Comprehensive Cancer Center, San Francisco, CA USA
| | - Byron Hann
- UCSF Helen Diller Family Comprehensive Cancer Center, San Francisco, CA USA
| | - Jean-Philippe Coppé
- Department of Laboratory Medicine, UCSF Helen Diller Family Comprehensive Cancer Center, San Francisco, CA USA
| | - Diane Heditsian
- Patient advocate University of California, San Francisco Breast Science Advocacy Core, San Francisco, CA USA
| | - Lamorna Swigart-Brown
- Department of Laboratory Medicine, UCSF Helen Diller Family Comprehensive Cancer Center, San Francisco, CA USA
| | - Ella F. Jones
- Department of Radiology and Biomedical Imaging, University of California, San Francisco, CA USA
| | - Sergey Magnitsky
- Department of Radiology and Biomedical Imaging, University of California, San Francisco, CA USA
| | - Ron J Keizer
- Department of Bioengineering & Therapeutic Sciences, University of California San Francisco, San Francisco, USA
| | - Niels de Vries
- Department of Clinical Pharmacy, Department of Pharmacy & Pharmacology, The Netherlands Cancer Institute, NKI-AVL, Amsterdam, The Netherlands
| | - Hilde Rosing
- Department of Clinical Pharmacy, Department of Pharmacy & Pharmacology, The Netherlands Cancer Institute, NKI-AVL, Amsterdam, The Netherlands
| | - Nela Pawlowska
- Department of Medicine, University of California San Francisco, 2340 Sutter Street, San Francisco, CA 9411 USA
| | - Scott Thomas
- Department of Medicine, University of California San Francisco, 2340 Sutter Street, San Francisco, CA 9411 USA
| | - Mallika Dhawan
- Department of Medicine, University of California San Francisco, 2340 Sutter Street, San Francisco, CA 9411 USA
| | - Rahul Aggarwal
- Department of Medicine, University of California San Francisco, 2340 Sutter Street, San Francisco, CA 9411 USA
| | - Pamela N. Munster
- Department of Medicine, University of California San Francisco, 2340 Sutter Street, San Francisco, CA 9411 USA
| | - Laura J. Esserman
- UCSF Helen Diller Family Comprehensive Cancer Center, San Francisco, CA USA
| | - Weiming Ruan
- Department of Laboratory Medicine, University of California San Francisco, San Francisco, CA USA
| | - Alan H. B. Wu
- Department of Laboratory Medicine, University of California San Francisco, San Francisco, CA USA
| | - Douglas Yee
- Division of Hematology Oncology, University of Minnesota, Minneapolis, MN USA
| | - Véronique Dartois
- Rutgers New Jersey Medical School, Public Health Research Institute, Rutgers, The State University of New Jersey, 225 Warren Ave, Newark, NJ USA
| | - Radojka M. Savic
- Department of Bioengineering & Therapeutic Sciences, University of California San Francisco, San Francisco, USA
| | - Denise M. Wolf
- Department of Laboratory Medicine, UCSF Helen Diller Family Comprehensive Cancer Center, San Francisco, CA USA
| | - Laura van ’t Veer
- Department of Laboratory Medicine, UCSF Helen Diller Family Comprehensive Cancer Center, San Francisco, CA USA
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10
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Chebouti I, Kuhlmann JD, Buderath P, Weber S, Wimberger P, Bokeloh Y, Hauch S, Kimmig R, Kasimir-Bauer S. ERCC1-expressing circulating tumor cells as a potential diagnostic tool for monitoring response to platinum-based chemotherapy and for predicting post-therapeutic outcome of ovarian cancer. Oncotarget 2017. [PMID: 28388557 DOI: 10.18632/oncotarget.13286] [] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
BACKGROUND We recently showed that the presence of ERCC1+CTCs is an independent predictive biomarker for platinum-resistance and poor prognosis of ovarian cancer. The goal of our current research was to determine how the auxiliary assessment of ERCC1-transcripts influences overall CTC-detection rate. We extended this investigation from an initially predictive setting to paired pre- and post-therapeutic blood analysis in order to see, whether ERCC1+CTCs dynamics mirror response to chemotherapy. METHODS 65 Paired blood samples (10ml) of primary ovarian cancer patients at primary diagnosis and after chemotherapy were studied for CTCs with the AdnaTest Ovarian Cancer (QIAGEN Hannover GmbH). We analyzed the tumor-associated transcripts EpCAM, MUC-1 and CA-125. ERCC1-transcripts were investigated in a separate approach by singleplex RT-PCR. RESULTS Auxiliary assessment of ERCC1-transcripts enhanced the overall CTC-detection rate up to 17%. ERCC1+CTCs (defined as positive for one of the AdnaTest markers plus ERCC1-positivity) were detected in 15% of patients at primary diagnosis and in 12% after chemotherapy. The presence of ERCC1+CTCs after chemotherapy correlated with platinum-resistance (P=0.01), reduced PFS (P=0.0293) and OS (P=0.0008) and their persistence indicated poor post-therapeutic outcome (PFS: P=0.005; OS: P=0.0058). Interestingly, the assessment of ERCC1-transcripts alone was sufficient for the detection of prognostic relevant ERCC1-expressing CTCs. CONCLUSION Auxiliary assessment of ERCC1-transcripts expands the phenotypic spectrum of CTC detection and defines an additional overlapping fraction of ERCC1-expressing CTCs, which are potentially selected by platinum-based chemotherapy. Specifically, we suggest that ERCC1+CTCs could additionally be useful as a surrogate for monitoring platinum-based chemotherapy and to assess the post-therapeutic outcome of ovarian cancer.
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Affiliation(s)
- Issam Chebouti
- Department of Gynecology and Obstetrics, University Hospital Essen, Essen, Germany.,German Cancer Consortium (DKTK), Dresden and German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Jan Dominik Kuhlmann
- Department of Gynecology and Obstetrics, Medical Faculty and University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany.,National Center for Tumor Diseases (NCT), Partner Site Dresden, Dresden, Germany.,German Cancer Consortium (DKTK), Dresden and German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Paul Buderath
- Department of Gynecology and Obstetrics, University Hospital Essen, Essen, Germany.,German Cancer Consortium (DKTK), Dresden and German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Stephan Weber
- ACOMED Statistik, Department of Biostatics, Magdeburg, Germany
| | - Pauline Wimberger
- Department of Gynecology and Obstetrics, Medical Faculty and University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany.,National Center for Tumor Diseases (NCT), Partner Site Dresden, Dresden, Germany.,German Cancer Consortium (DKTK), Dresden and German Cancer Research Center (DKFZ), Heidelberg, Germany
| | | | | | - Rainer Kimmig
- Department of Gynecology and Obstetrics, University Hospital Essen, Essen, Germany.,German Cancer Consortium (DKTK), Dresden and German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Sabine Kasimir-Bauer
- Department of Gynecology and Obstetrics, University Hospital Essen, Essen, Germany.,German Cancer Consortium (DKTK), Dresden and German Cancer Research Center (DKFZ), Heidelberg, Germany
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11
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Chebouti I, Kuhlmann JD, Buderath P, Weber S, Wimberger P, Bokeloh Y, Hauch S, Kimmig R, Kasimir-Bauer S. ERCC1-expressing circulating tumor cells as a potential diagnostic tool for monitoring response to platinum-based chemotherapy and for predicting post-therapeutic outcome of ovarian cancer. Oncotarget 2017. [PMID: 28388557 DOI: 10.18632/oncotarget.13286]+[] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
BACKGROUND We recently showed that the presence of ERCC1+CTCs is an independent predictive biomarker for platinum-resistance and poor prognosis of ovarian cancer. The goal of our current research was to determine how the auxiliary assessment of ERCC1-transcripts influences overall CTC-detection rate. We extended this investigation from an initially predictive setting to paired pre- and post-therapeutic blood analysis in order to see, whether ERCC1+CTCs dynamics mirror response to chemotherapy. METHODS 65 Paired blood samples (10ml) of primary ovarian cancer patients at primary diagnosis and after chemotherapy were studied for CTCs with the AdnaTest Ovarian Cancer (QIAGEN Hannover GmbH). We analyzed the tumor-associated transcripts EpCAM, MUC-1 and CA-125. ERCC1-transcripts were investigated in a separate approach by singleplex RT-PCR. RESULTS Auxiliary assessment of ERCC1-transcripts enhanced the overall CTC-detection rate up to 17%. ERCC1+CTCs (defined as positive for one of the AdnaTest markers plus ERCC1-positivity) were detected in 15% of patients at primary diagnosis and in 12% after chemotherapy. The presence of ERCC1+CTCs after chemotherapy correlated with platinum-resistance (P=0.01), reduced PFS (P=0.0293) and OS (P=0.0008) and their persistence indicated poor post-therapeutic outcome (PFS: P=0.005; OS: P=0.0058). Interestingly, the assessment of ERCC1-transcripts alone was sufficient for the detection of prognostic relevant ERCC1-expressing CTCs. CONCLUSION Auxiliary assessment of ERCC1-transcripts expands the phenotypic spectrum of CTC detection and defines an additional overlapping fraction of ERCC1-expressing CTCs, which are potentially selected by platinum-based chemotherapy. Specifically, we suggest that ERCC1+CTCs could additionally be useful as a surrogate for monitoring platinum-based chemotherapy and to assess the post-therapeutic outcome of ovarian cancer.
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Affiliation(s)
- Issam Chebouti
- Department of Gynecology and Obstetrics, University Hospital Essen, Essen, Germany.,German Cancer Consortium (DKTK), Dresden and German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Jan Dominik Kuhlmann
- Department of Gynecology and Obstetrics, Medical Faculty and University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany.,National Center for Tumor Diseases (NCT), Partner Site Dresden, Dresden, Germany.,German Cancer Consortium (DKTK), Dresden and German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Paul Buderath
- Department of Gynecology and Obstetrics, University Hospital Essen, Essen, Germany.,German Cancer Consortium (DKTK), Dresden and German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Stephan Weber
- ACOMED Statistik, Department of Biostatics, Magdeburg, Germany
| | - Pauline Wimberger
- Department of Gynecology and Obstetrics, Medical Faculty and University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany.,National Center for Tumor Diseases (NCT), Partner Site Dresden, Dresden, Germany.,German Cancer Consortium (DKTK), Dresden and German Cancer Research Center (DKFZ), Heidelberg, Germany
| | | | | | - Rainer Kimmig
- Department of Gynecology and Obstetrics, University Hospital Essen, Essen, Germany.,German Cancer Consortium (DKTK), Dresden and German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Sabine Kasimir-Bauer
- Department of Gynecology and Obstetrics, University Hospital Essen, Essen, Germany.,German Cancer Consortium (DKTK), Dresden and German Cancer Research Center (DKFZ), Heidelberg, Germany
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12
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Stornetta A, Zimmermann M, Cimino GD, Henderson PT, Sturla SJ. DNA Adducts from Anticancer Drugs as Candidate Predictive Markers for Precision Medicine. Chem Res Toxicol 2017; 30:388-409. [PMID: 27936622 PMCID: PMC5379252 DOI: 10.1021/acs.chemrestox.6b00380] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2016] [Indexed: 01/23/2023]
Abstract
Biomarker-driven drug selection plays a central role in cancer drug discovery and development, and in diagnostic strategies to improve the use of traditional chemotherapeutic drugs. DNA-modifying anticancer drugs are still used as first line medication, but drawbacks such as resistance and side effects remain an issue. Monitoring the formation and level of DNA modifications induced by anticancer drugs is a potential strategy for stratifying patients and predicting drug efficacy. In this perspective, preclinical and clinical data concerning the relationship between drug-induced DNA adducts and biological response for platinum drugs and combination therapies, nitrogen mustards and half-mustards, hypoxia-activated drugs, reductase-activated drugs, and minor groove binding agents are presented and discussed. Aspects including measurement strategies, identification of adducts, and biological factors that influence the predictive relationship between DNA modification and biological response are addressed. A positive correlation between DNA adduct levels and response was observed for the majority of the studies, demonstrating the high potential of using DNA adducts from anticancer drugs as mechanism-based biomarkers of susceptibility, especially as bioanalysis approaches with higher sensitivity and throughput emerge.
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Affiliation(s)
- Alessia Stornetta
- Department
of Health Sciences and Technology, ETH Zurich, Schmelzbergstrasse 9, 8092 Zurich, Switzerland
| | - Maike Zimmermann
- Department
of Internal Medicine, Division of Hematology and Oncology and the
UC Davis Comprehensive Cancer Center, University
of California Davis, 4501 X Street, Sacramento, California 95655, United States
- Accelerated
Medical Diagnostics, Inc., 2121 Second Street, B101, Davis, California 95618, United States
| | - George D. Cimino
- Accelerated
Medical Diagnostics, Inc., 2121 Second Street, B101, Davis, California 95618, United States
| | - Paul T. Henderson
- Department
of Internal Medicine, Division of Hematology and Oncology and the
UC Davis Comprehensive Cancer Center, University
of California Davis, 4501 X Street, Sacramento, California 95655, United States
- Accelerated
Medical Diagnostics, Inc., 2121 Second Street, B101, Davis, California 95618, United States
| | - Shana J. Sturla
- Department
of Health Sciences and Technology, ETH Zurich, Schmelzbergstrasse 9, 8092 Zurich, Switzerland
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13
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Cui L, Her S, Dunne M, Borst GR, De Souza R, Bristow RG, Jaffray DA, Allen C. Significant Radiation Enhancement Effects by Gold Nanoparticles in Combination with Cisplatin in Triple Negative Breast Cancer Cells and Tumor Xenografts. Radiat Res 2017; 187:147-160. [PMID: 28085639 DOI: 10.1667/rr14578.1] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Gold nanoparticles (AuNPs) and cisplatin have been explored in concomitant chemoradiotherapy, wherein they elicit their effects by distinct and overlapping mechanisms. Cisplatin is one of the most frequently utilized radiosensitizers in the clinical setting; however, the therapeutic window of cisplatin-aided chemoradiotherapy is limited by its toxicity. The goal of this study was to determine whether AuNPs contribute to improving the treatment response when combined with fractionated cisplatin-based chemoradiation in both in vitro and in vivo models of triple-negative breast cancer (MDA-MB-231Luc+). Cellular-targeting AuNPs with receptor-mediated endocytosis (AuNP-RME) in vitro at a noncytotoxic concentration (0.5 mg/ml) or cisplatin at IC25 (12 μM) demonstrated dose enhancement factors (DEFs) of 1.25 and 1.14, respectively; the combination of AuNP-RME and cisplatin resulted in a significant DEF of 1.39 in vitro. Transmission electron microscopy (TEM) images showed effective cellular uptake of AuNPs at tumor sites 24 h after intratumoral infusion. Computed tomography (CT) images demonstrated that the intratumoral levels of gold remained stable up to 120 h after infusion. AuNPs (0.5 mg gold per tumor) demonstrated a radiation enhancement effect that was equivalent to three doses of cisplatin at IC25 (4 mg/kg), but did not induce intrinsic toxicity or increased radiotoxicity. Results from this study suggest that AuNPs are the true radiosensitizer in these settings. Importantly, AuNPs enhance the treatment response when combined with cisplatin-based fractionated chemoradiation. This combination of AuNPs and cisplatin provides a promising approach to improving the therapeutic ratio of fractionated radiotherapy.
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Affiliation(s)
- Lei Cui
- Departments of a Pharmaceutical Sciences, Leslie Dan Faculty of Pharmacy
| | - Sohyoung Her
- Departments of a Pharmaceutical Sciences, Leslie Dan Faculty of Pharmacy
| | - Michael Dunne
- Departments of a Pharmaceutical Sciences, Leslie Dan Faculty of Pharmacy
| | - Gerben R Borst
- d Department of Radiation Oncology, the Netherlands Cancer Institute - Antoni van Leeuwenhoek Hospital, Amsterdam, The Netherlands; and
| | - Raquel De Souza
- Departments of a Pharmaceutical Sciences, Leslie Dan Faculty of Pharmacy
| | - Robert G Bristow
- b Radiation Oncology and Medical Biophysics and.,e Ontario Cancer Institute.,f STTARR Innovation Centre, Radiation Medicine Program
| | - David A Jaffray
- b Radiation Oncology and Medical Biophysics and.,c Institute of Biomaterials and Biomedical Engineering, University of Toronto, Toronto, Ontario, Canada.,f STTARR Innovation Centre, Radiation Medicine Program.,g TECHNA Institute and.,h Department of Radiation Physics, Princess Margaret Cancer Centre, University Health Network, Toronto, Ontario, Canada
| | - Christine Allen
- Departments of a Pharmaceutical Sciences, Leslie Dan Faculty of Pharmacy.,c Institute of Biomaterials and Biomedical Engineering, University of Toronto, Toronto, Ontario, Canada.,f STTARR Innovation Centre, Radiation Medicine Program
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Delayed DNA double-strand break repair following platin-based chemotherapy predicts treatment response in head and neck squamous cell carcinoma. Br J Cancer 2016; 115:825-30. [PMID: 27584664 PMCID: PMC5046213 DOI: 10.1038/bjc.2016.266] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2016] [Revised: 07/27/2016] [Accepted: 08/01/2016] [Indexed: 01/31/2023] Open
Abstract
INTRODUCTION The aim of this study was to investigate if defective repair of DNA double-strand break (DSB) in head and neck squamous cell carcinoma (HNSCC) could be used as an early predictor of treatment response. METHODS Tumour biopsy 24-36 h following induction chemotherapy (IC) and pre-treatment biopsies were stained for RAD51 and geminin (S-phase marker) for immunofluorescence in patients with HNSCC. The difference between RAD51 score (percentage of geminin-positive cells that were also positive for RAD51) was calculated for the two specimens. Tumours with a percentage difference of⩽10% were deemed to have repaired IC-induced DSBs, and were classified as 'RAD51 negative'. Response at 3 months post treatment and human papilloma virus (HPV) status were assessed. RESULTS Thirteen pairs of samples were available for analyses. Three samples were classified as RAD51 negative and 10 as RAD51 positive at 24 h post IC. All of the three patients with tumours classified as RAD51 negative had partial response or progressive disease and the 10 patients with tumours deemed RAD51 positive had a complete response. 100% of the HPV-positive tumours were RAD51 positive and had a complete response. CONCLUSIONS We have demonstrated that impaired DSB DNA repair may underlie enhanced treatment sensitivity of HPV-positive HNSCC and repair capacity following platinum-induced DNA damage predicts response in HNSCC. This has potential as a biomarker for patient selection in trials of DNA damage response pathway modulation.
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Can the response to a platinum-based therapy be predicted by the DNA repair status in non-small cell lung cancer? Cancer Treat Rev 2016; 48:8-19. [DOI: 10.1016/j.ctrv.2016.05.004] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2015] [Revised: 04/04/2016] [Accepted: 05/12/2016] [Indexed: 12/17/2022]
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16
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Nel I, Jehn U, Gauler T, Hoffmann AC. Individual profiling of circulating tumor cell composition in patients with non-small cell lung cancer receiving platinum based treatment. Transl Lung Cancer Res 2015; 3:100-6. [PMID: 25806288 DOI: 10.3978/j.issn.2218-6751.2014.03.05] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2014] [Accepted: 03/23/2014] [Indexed: 12/30/2022]
Abstract
BACKGROUND Circulating tumor cells (CTC) could serve as a "liquid biopsy" for individualizing and monitoring treatment in patients with solid tumors as recently shown by our group. We assessed which non-hematopoietic cell types are identifiable in the peripheral blood of patients with non-small cell lung cancer (NSCLC) and correlated those to clinical characteristics. METHODS Blood from NSCLC patients (n=43) was processed as previously described. For subtype analyses CTC were negatively enriched by hematopoietic cell depletion. The remaining cell suspension included pre-enriched tumor cells and was spun onto glass slides and further characterized by multi-immunofluorescence staining against epithelial markers pan-cytokeratin (CK) and epithelial cell adhesion molecule (EpCAM), mesenchymal marker N-cadherin, stem cell marker CD133, hematopoietic marker CD45 and nuclear counterstain DAPI. Individual cell type profiles were analyzed and correlated to therapeutic outcome. RESULTS Among other associations of CTC subtypes with clinical parameters Kaplan-Meier test revealed that an increased CD133-positive to pan-CK-positive cell type ratio (stem cell like to epithelial ratio) and the presence of mesenchymal N-cadherin+ cells, both were significantly associated to shortened PFS (2 vs. 8 months, P=0.003, HR =4.43; 5 vs. 8 months, P=0.03, HR =2.63). CONCLUSIONS Our data suggest that different CTC populations are identifiable in peripheral blood and that these individual cell type profiles might be used to predict outcome to platinum based systemic therapies in lung cancer patients.
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Affiliation(s)
- Ivonne Nel
- 1 Molecular Oncology Risk-Profile Evaluation, Department of Medical Oncology, West German Cancer Center, 2 Department of Radiotherapy, 3 Department of Medical Oncology, West German Cancer Center, University Duisburg-Essen, 45122 Essen, Germany
| | - Ulrich Jehn
- 1 Molecular Oncology Risk-Profile Evaluation, Department of Medical Oncology, West German Cancer Center, 2 Department of Radiotherapy, 3 Department of Medical Oncology, West German Cancer Center, University Duisburg-Essen, 45122 Essen, Germany
| | - Thomas Gauler
- 1 Molecular Oncology Risk-Profile Evaluation, Department of Medical Oncology, West German Cancer Center, 2 Department of Radiotherapy, 3 Department of Medical Oncology, West German Cancer Center, University Duisburg-Essen, 45122 Essen, Germany
| | - Andreas-Claudius Hoffmann
- 1 Molecular Oncology Risk-Profile Evaluation, Department of Medical Oncology, West German Cancer Center, 2 Department of Radiotherapy, 3 Department of Medical Oncology, West German Cancer Center, University Duisburg-Essen, 45122 Essen, Germany
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17
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Detection of circulating tumor cell subpopulations in patients with head and neck squamous cell carcinoma (HNSCC). PLoS One 2014; 9:e113706. [PMID: 25479539 PMCID: PMC4257624 DOI: 10.1371/journal.pone.0113706] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2014] [Accepted: 10/28/2014] [Indexed: 12/21/2022] Open
Abstract
Background Since image based diagnostic tools fail to detect early metastasis in head and neck squamous cell carcinoma (HNSCC) it is crucial to develop minimal invasive diagnostic methods. A promising approach is to identify and characterize circulating tumor cells (CTC) in the peripheral blood of HNSCC patients. In this pilot study, we assessed which non-hematopoietic cell types are identifiable and whether their numbers differ in pre- and postoperative blood samples. Methods 20 ml citrated peripheral blood was taken from 10 HNSCC patients before and after curative resection. CTC were enriched using density gradient centrifugation. CTC presence was verified by multi-immunofluorescence staining against cytokeratin (CK; epithelial), N-cadherin (mesenchymal); CD133 (stem-cell), CD45 (hematopoietic) and DAPI (nucleus). Individual cell type profiles were analyzed. Results We were able to detect cells with epithelial properties like CK+/N-cadherin−/CD45− and CK+/CD133−/CD45− as well as cells with mesenchymal features such as N-cadherin+/CK−/CD45− and cells with both characteristics like N-cadherin+/CK+/CD45−. We also observed cells showing stem cell-like features like CD133+/CK−/CD45− and cells with both epithelial and stem cell-like features such as CD133+/CK+/CD45−. The number of CK positive cells (p = 0.002), N-cadherin positive cells (p = 0.002) and CD133 positive cells (p = 0.01) decreased significantly after resection. Kaplan-Meier test showed that the survival was significantly shorter when N-cadherin+ cells were present after resection (p = 0.04; 474 vs. 235 days; [HR] = 3.1). Conclusions This is - to the best of our knowledge- the first pilot study identifying different CTC populations in peripheral blood of HNSCC patients and showing that these individual cell type profiles may have distinct clinical implications.
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