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Yanar S, Sarihan M, Kasap M, Akpinar G, Teke K, Yaprak Bayrak B. GFP Transfection Alters Protein Expression Patterns in Prostate Cancer Cells: A Proteomic Study. J Fluoresc 2024:10.1007/s10895-023-03498-4. [PMID: 38502405 DOI: 10.1007/s10895-023-03498-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2023] [Accepted: 11/06/2023] [Indexed: 03/21/2024]
Abstract
PURPOSE Green Fluorescent Protein is widely used as a cellular marker tool, but its potential influence on cells has been questioned. Although the potential off-target effects of GFP on tumor cells have been studied to some extent, the findings at the molecular level are insufficient to explain the effect of GFP expression on the tumorigenic capacity of cancer cells. Here, we aimed to investigate the effect of GFP expression on the tumorigenicity of PC3 prostate cancer cells. METHODS Using GFP-expressing and wild-type PC-3 cells, xenograft models were generated in athymic BALB/C mice. To identify differentially expressed proteins, the change in cells proteome was investigated by label-free quantification with nano-high performance liquid chromatography to tandem mass spectrometry (nHPLC-MS/MS). Proteins that showed significantly altered expression levels were evaluated using the bioinformatics tools. RESULTS Unlike the wild-type PC-3 cells, GFP-expressing cells failed to develop tumor. Comparative proteome analysis of GFP-expressing cells with WT PC-3 cells revealed a total of 216 differentially regulated proteins, of which 98 were upregulated and 117 were downregulated. CONCLUSION Upon GFP expression, differential changes in several pathways including the immune system, translational machinery, energy metabolism, elements of cytoskeletal and VEGF signaling pathway were observed. Therefore, care should be taken into account to prevent reporting deceitful mechanisms generated from studies utilizing GFP.
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Affiliation(s)
- Sevinc Yanar
- Faculty of Medicine, Department of Medical Biology, Kocaeli University, Kocaeli, Turkey.
- Faculty of Medicine, Department of Histology and Embryology, Sakarya University, Korucuk, Sakarya, Turkey.
| | - Mehmet Sarihan
- Faculty of Medicine, Department of Medical Biology, Kocaeli University, Kocaeli, Turkey
| | - Murat Kasap
- Faculty of Medicine, Department of Medical Biology, Kocaeli University, Kocaeli, Turkey
| | - Gurler Akpinar
- Faculty of Medicine, Department of Medical Biology, Kocaeli University, Kocaeli, Turkey
| | - Kerem Teke
- Faculty of Medicine, Department of Urology, Kocaeli University, Kocaeli, Turkey
| | - Busra Yaprak Bayrak
- Faculty of Medicine, Department of Pathology, Kocaeli University, Kocaeli, Turkey
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2
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Zhuang B, Zhu X, Lin J, Zhang F, Qiao B, Kang J, Xie X, Wei X, Xie X. Radiofrequency ablation induces tumor cell dissemination in a mouse model of hepatocellular carcinoma. Eur Radiol Exp 2023; 7:74. [PMID: 38019353 PMCID: PMC10686970 DOI: 10.1186/s41747-023-00382-5] [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] [Received: 05/16/2023] [Accepted: 08/30/2023] [Indexed: 11/30/2023] Open
Abstract
BACKGROUND We tested the hypothesis that radiofrequency ablation (RFA) for hepatocellular carcinoma (HCC) promotes tumor cell release and explored a method for reducing these effects. METHODS A green fluorescent protein-transfected orthotopic HCC model was established in 99 nude mice. In vivo flow cytometry was used to monitor circulating tumor cell (CTC) dynamics. Pulmonary fluorescence imaging and pathology were performed to investigate lung metastases. First, the kinetics of CTCs during the periablation period and the survival rate of CTCs released during RFA were investigated. Next, mice were allocated to controls, sham ablation, or RFA with/without hepatic vessel blocking (ligation of the portal triads) for evaluating the postablation CTC level, lung metastases, and survival over time. Moreover, the kinetics of CTCs, lung metastases, and mice survival were evaluated for RFA with/without ethanol injection. Pathological changes in tumors and surrounding parenchyma after ethanol injection were noted. Statistical analysis included t-test, ANOVA, and Kaplan-Meier survival curves. RESULTS CTC counts were 12.3-fold increased during RFA, and 73.7% of RFA-induced CTCs were viable. Pre-RFA hepatic vessel blocking prevented the increase of peripheral CTCs, reduced the number of lung metastases, and prolonged survival (all p ≤ 0.05). Similarly, pre-RFA ethanol injection remarkably decreased CTC release during RFA and further decreased lung metastases with extended survival (all p ≤ 0.05). Histopathology revealed thrombus formation in blood vessels after ethanol injection, which may clog tumor cell dissemination during RFA. CONCLUSION RFA induces viable tumor cell dissemination, and pre-RFA ethanol injection may provide a prophylactic strategy to reduce this underestimated effect. RELEVANCE STATEMENT RFA for HCC promotes viable tumor cell release during ablation, while ethanol injection can prevent RFA induced tumor cell release. KEY POINTS • RFA induced the release of viable tumor cells during the ablation procedure in an animal model. • Hepatic vessel blocking can suppress tumor cells dissemination during RFA. • Ethanol injection can prevent RFA-induced tumor cell release, presumably because of the formation of thrombosis.
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Affiliation(s)
- Bowen Zhuang
- Department of Medical Ultrasonics, The First Affiliated Hospital of Sun Yat-Sen University, Institute of Diagnostic and Interventional Ultrasound, Guangzhou, 510080, China
| | - Xi Zhu
- Biomedical Engineering Research Center, Kunming Medical University, Kunming, China
| | - Jinhua Lin
- Department of Medical Ultrasonics, The First Affiliated Hospital of Sun Yat-Sen University, Institute of Diagnostic and Interventional Ultrasound, Guangzhou, 510080, China
| | - Fuli Zhang
- Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China
| | - Bin Qiao
- Department of Medical Ultrasonics, The First Affiliated Hospital of Sun Yat-Sen University, Institute of Diagnostic and Interventional Ultrasound, Guangzhou, 510080, China
| | - Jihui Kang
- Department of Pathology, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China
| | - Xiaohua Xie
- Department of Medical Ultrasonics, The First Affiliated Hospital of Sun Yat-Sen University, Institute of Diagnostic and Interventional Ultrasound, Guangzhou, 510080, China
| | - Xunbin Wei
- Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China.
- Biomedical Engineering Department, Peking University, Beijing, 100081, China.
- Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Peking University Cancer Hospital & Institute, Beijing, 100142, China.
| | - Xiaoyan Xie
- Department of Medical Ultrasonics, The First Affiliated Hospital of Sun Yat-Sen University, Institute of Diagnostic and Interventional Ultrasound, Guangzhou, 510080, China.
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Nabavinia M, Kanjilal B, Pandey M, Jonnalagadda S, Hesketh R, Martins-Green M, Noshadi I. Hydrogel-Encapsulated Heterogenous Mesoporous Resin Catalyst for In Situ Anti-Cancer Agent Production under Biological Conditions. Biomolecules 2022; 12:biom12121796. [PMID: 36551224 PMCID: PMC9776059 DOI: 10.3390/biom12121796] [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: 10/18/2022] [Revised: 11/21/2022] [Accepted: 11/25/2022] [Indexed: 12/02/2022] Open
Abstract
A heterogenous Palladium anchored Resorcinol-formaldehyde-hyperbranched PEI mesoporous catalyst, made by one-pot synthesis, was used successfully for in situ Suzuki-Miyaura cross coupling synthesis of anticancer prodrug PP-121 from iodoprazole and boronic ester precursors. The mesoporous catalyst with the non-cytotoxic precursors were tested in 2D in vitro model with excellent cytocompatibility and a strong suppression of PC3 cancer cell proliferation, underscored by 50% reduction in PC3 cells viability and 55% reduction in cell metabolism activity and an enhanced rate of early and late apoptosis in flow cytometry, that was induced only by successful in situ pro drug PP121 synthesis from the precursors. The 3D gelatin methacrylate hydrogel encapsulated in vitro cell models underscored the results with a 52% reduction in cell metabolism and underscored apoptosis of PC3 cells when the Pd anchored catalyst was combined with the precursors. In situ application of Suzuki-Miyaura cross coupling of non-cytotoxic precursors to cancer drug, along with their successful encapsulation in an injectable hydrogel could be applied for tumor point drug delivery strategies that can circumvent deleterious side effects and poor bioavailability chemotherapy routes with concomitant enhanced efficacy.
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Affiliation(s)
- Mahboubeh Nabavinia
- Department of Chemical Engineering, Rowan University, Glassboro, NJ 08029, USA
| | - Baishali Kanjilal
- Department of Bioengineering, University of California, Riverside, CA 92507, USA
| | - Manoj Pandey
- Department of Biomedical Sciences, Cooper Medical School of Rowan University, Glassboro, NJ 08103, USA
| | - Subash Jonnalagadda
- Department of Chemistry and Biochemistry, Rowan University, Glassboro, NJ 08028, USA
| | - Robert Hesketh
- Department of Chemical Engineering, Rowan University, Glassboro, NJ 08029, USA
| | - Manuela Martins-Green
- Department of Molecular, Cell and Systems Biology, University of California, Riverside, CA 92521, USA
| | - Iman Noshadi
- Department of Bioengineering, University of California, Riverside, CA 92507, USA
- Correspondence:
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Zhang D, Wang Y, Liu L, Li Z, Yang S, Zhao W, Wang X, Liao H, Zhou S. Establishment and evaluation of ectopic and orthotopic prostate cancer models using cell sheet technology. Lab Invest 2022; 20:381. [PMID: 36038939 PMCID: PMC9422158 DOI: 10.1186/s12967-022-03575-5] [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: 05/02/2022] [Accepted: 08/04/2022] [Indexed: 08/30/2023]
Abstract
Background The traditional prostate cancer (PCa) model is established by injecting cell suspension and is associated with a low tumor formation rate. Cell sheet technology is one of the advancements in tissue engineering for 3D cell-based therapy. In this study, we established ectopic and orthotopic PCa models by cell sheet technology, and then compared the efficiency of tumor formation with cell suspension injection. Methods DU145 cells were seeded on 35 mm temperature-sensitive dishes to form PCa cell sheets, while the cell suspension with the same cell density was prepared. After transplanting into the nude mice, the tumor volumes were measured every 3 days and the tumor growth curves were conducted. At the time points of 2 weeks and 4 weeks after the transplantation, magnetic resonance imaging (MRI) was used to evaluate the transplanting site and distant metastasis. Finally, the mice were sacrificed, and the related tissues were harvested for the further histological evaluation. Results The orthotopic tumor formation rate of the cell sheet injection group was obviously better than that in cell suspension injection group (100% vs 67%). Compared with cell suspension injection, the tumors of DU145 cell sheet fragments injection had the higher density of micro-vessels, more collagen deposition, and lower apoptosis rate. There was no evidence of metastasis in forelimb, lung and liver was found by MRI and histological tests. Conclusion We successfully cultured the DU145 cell sheet and can be used to establish ectopic and orthotopic PCa tumor-bearing models, which provide an application potential for preclinical drug development, drug-resistance mechanisms and patient individualized therapy.
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Affiliation(s)
- Dongliang Zhang
- Department of Urology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Ying Wang
- Department of Urology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai Eastern Institute of Urologic Reconstruction, Shanghai Jiao Tong University, Shanghai, 200233, China
| | - Lei Liu
- Department of Urology, Sichuan Cancer Hospital & Institute, Sichuan Cancer Center, School of Medicine, University of Electronic Science and Technology of China, Chengdu, 610041, China
| | - Zeng Li
- Department of Urology, Sichuan Cancer Hospital & Institute, Sichuan Cancer Center, School of Medicine, University of Electronic Science and Technology of China, Chengdu, 610041, China
| | - Shengke Yang
- Department of Urology, Sichuan Cancer Hospital & Institute, Sichuan Cancer Center, School of Medicine, University of Electronic Science and Technology of China, Chengdu, 610041, China
| | - Weixin Zhao
- Wake Forest Institute for Regenerative Medicine, Wake Forest University School of Medicine, Winston Salem, NC, 27157, USA
| | - Xiang Wang
- Department of Urology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Hong Liao
- Department of Urology, Sichuan Cancer Hospital & Institute, Sichuan Cancer Center, School of Medicine, University of Electronic Science and Technology of China, Chengdu, 610041, China.
| | - Shukui Zhou
- Department of Urology, Sichuan Cancer Hospital & Institute, Sichuan Cancer Center, School of Medicine, University of Electronic Science and Technology of China, Chengdu, 610041, China.
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5
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Inoue GN, Pimenta R, Camargo JA, Viana NI, Guimarães VR, Srougi M, Nahas WC, Leite KR, Reis ST. Combined spinal and general anesthesia attenuate tumor promoting effects of surgery. An experimental animal study. Ann Med Surg (Lond) 2022; 75:103398. [PMID: 35386811 PMCID: PMC8977895 DOI: 10.1016/j.amsu.2022.103398] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2022] [Accepted: 02/21/2022] [Indexed: 11/28/2022] Open
Abstract
Background Radical prostatectomy, a standard management approach for localized Prostate Cancer (PC), may cause a stress response associated with immune modulating effects. Regional anesthesia was hypothesized to reduce the immune effects of surgery by minimizing the neuroendocrine surgical stress response, thus mitigating tumor cells dissemination. Our primary objective was to investigate whether the use of spinal blocks attenuates PC tumor cells dissemination on an animal model. We also assessed the number of circulating NK cells and the amount of inflammatory and anti-inflammatory cytokines. Materials and methods A subcutaneous tumor model, with PC-3M cell line transfected with a luciferase-producing gene (PC-3M-luc-C6) was used. After proper tumor establishment and before tumors became metastatic, animals were submitted to tumor excision surgeries under general or combined (general and spinal) anesthesia. A control group was only anesthetized with general anesthesia. Results The subcutaneous tumor model with PC-3M-luc-C6 cells was effective in causing distant metastasis after 35 days. The number of circulating tumor cells increased in animals that underwent surgery under general anesthesia alone compared to the group submitted to combined anesthesia. Interleukin 6 levels were different in all groups, with increase in the general anesthesia group. Conclusion Our results suggest that combination of spinal and general anesthesia may attenuate the suppression of innate tumor immunity and it might be related to a reduction in the neuroendocrine response to surgery. Institutional protocol number Animal Ethics Committee 1332/2019. Regional anesthesia is related to a reduction in the neuroendocrine response to surgery. Spinal anesthesia combined with general anesthesia modulates Circulating Tumor Cells and cytokines after tissue damage. General anesthesia combined to spinal block could reduce cancer cells dissemination in the postoperative period.
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Affiliation(s)
- Gustavo N.C. Inoue
- Laboratory of Medical Investigation (LIM55), Urology Department, University of Sao Paulo Medical School, Sao Paulo, 01246-903, Brazil
- Corresponding author. Medical Investigation Laboratory (LIM55), Urology Department, University of Sao Paulo Medical School (FMUSP), Sao Paulo, Brazil, Av. Dr. Arnaldo 455, 2nd floor, room 2145, Cerqueira Cesar, São Paulo, SP, 01246-903, Brazil.
| | - Ruan Pimenta
- Laboratory of Medical Investigation (LIM55), Urology Department, University of Sao Paulo Medical School, Sao Paulo, 01246-903, Brazil
| | - Juliana A. Camargo
- Laboratory of Medical Investigation (LIM55), Urology Department, University of Sao Paulo Medical School, Sao Paulo, 01246-903, Brazil
| | - Nayara I. Viana
- Laboratory of Medical Investigation (LIM55), Urology Department, University of Sao Paulo Medical School, Sao Paulo, 01246-903, Brazil
| | - Vanessa R. Guimarães
- Laboratory of Medical Investigation (LIM55), Urology Department, University of Sao Paulo Medical School, Sao Paulo, 01246-903, Brazil
| | - Miguel Srougi
- Laboratory of Medical Investigation (LIM55), Urology Department, University of Sao Paulo Medical School, Sao Paulo, 01246-903, Brazil
| | - William C. Nahas
- Uro-Oncology Group, Urology Department, University of Sao Paulo Medical School and Instituto do Câncer do Estado de São Paulo (ICESP), Sao Paulo, 01246-000, Brazil
| | - Katia R.M. Leite
- Laboratory of Medical Investigation (LIM55), Urology Department, University of Sao Paulo Medical School, Sao Paulo, 01246-903, Brazil
| | - Sabrina T. Reis
- Laboratory of Medical Investigation (LIM55), Urology Department, University of Sao Paulo Medical School, Sao Paulo, 01246-903, Brazil
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6
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Hamza B, Miller AB, Meier L, Stockslager M, Ng SR, King EM, Lin L, DeGouveia KL, Mulugeta N, Calistri NL, Strouf H, Bray C, Rodriguez F, Freed-Pastor WA, Chin CR, Jaramillo GC, Burger ML, Weinberg RA, Shalek AK, Jacks T, Manalis SR. Measuring kinetics and metastatic propensity of CTCs by blood exchange between mice. Nat Commun 2021; 12:5680. [PMID: 34584084 PMCID: PMC8479082 DOI: 10.1038/s41467-021-25917-5] [Citation(s) in RCA: 7] [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: 10/12/2020] [Accepted: 08/24/2021] [Indexed: 01/02/2023] Open
Abstract
Existing preclinical methods for acquiring dissemination kinetics of rare circulating tumor cells (CTCs) en route to forming metastases have not been capable of providing a direct measure of CTC intravasation rate and subsequent half-life in the circulation. Here, we demonstrate an approach for measuring endogenous CTC kinetics by continuously exchanging CTC-containing blood over several hours between un-anesthetized, tumor-bearing mice and healthy, tumor-free counterparts. By tracking CTC transfer rates, we extrapolated half-life times in the circulation of between 40 and 260 s and intravasation rates between 60 and 107,000 CTCs/hour in mouse models of small-cell lung cancer (SCLC), pancreatic ductal adenocarcinoma (PDAC), and non-small cell lung cancer (NSCLC). Additionally, direct transfer of only 1-2% of daily-shed CTCs using our blood-exchange technique from late-stage, SCLC-bearing mice generated macrometastases in healthy recipient mice. We envision that our technique will help further elucidate the role of CTCs and the rate-limiting steps in metastasis.
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MESH Headings
- Animals
- Blood Transfusion/methods
- Carcinoma, Non-Small-Cell Lung/blood
- Carcinoma, Non-Small-Cell Lung/pathology
- Carcinoma, Pancreatic Ductal/blood
- Carcinoma, Pancreatic Ductal/pathology
- Cell Line, Tumor
- Humans
- Kinetics
- Lung Neoplasms/blood
- Lung Neoplasms/pathology
- Mice, 129 Strain
- Mice, Inbred C57BL
- Mice, Knockout
- Mice, Transgenic
- Neoplasm Metastasis
- Neoplastic Cells, Circulating/pathology
- Pancreatic Neoplasms/blood
- Pancreatic Neoplasms/pathology
- Propensity Score
- RNA-Seq/methods
- Single-Cell Analysis/methods
- Small Cell Lung Carcinoma/blood
- Small Cell Lung Carcinoma/pathology
- Mice
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Affiliation(s)
- Bashar Hamza
- Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, MA, USA
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Alex B Miller
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA, USA
- Harvard-MIT Department of Health Sciences and Technology, Institute for Medical Engineering and Science, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Lara Meier
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA, USA
- Department of Oncology, Hematology and Bone Marrow Transplantation with Section Pneumology, Hubertus Wald Comprehensive Cancer Center Hamburg, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, Hamburg, Germany
- Department of Tumor Biology, Center of Experimental Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Max Stockslager
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA, USA
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Sheng Rong Ng
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA, USA
- Department of Biology, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Emily M King
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Lin Lin
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Kelsey L DeGouveia
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA, USA
- Department of Biomedical Engineering, Wentworth Institute of Technology, Boston, MA, USA
| | - Nolawit Mulugeta
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Nicholas L Calistri
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Haley Strouf
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Christina Bray
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Felicia Rodriguez
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA, USA
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - William A Freed-Pastor
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA, USA
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA, USA
| | - Christopher R Chin
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Grissel C Jaramillo
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA, USA
- Department of Biology, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Megan L Burger
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Robert A Weinberg
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA, USA
- Department of Biology, Massachusetts Institute of Technology, Cambridge, MA, USA
- Whitehead Institute for Biomedical Research, Cambridge, MA, USA
| | - Alex K Shalek
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA, USA
- Harvard-MIT Department of Health Sciences and Technology, Institute for Medical Engineering and Science, Massachusetts Institute of Technology, Cambridge, MA, USA
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA, USA
- Institute for Medical Engineering and Science, Massachusetts Institute of Technology, Cambridge, MA, USA
- Broad Institute of MIT and Harvard, Cambridge, MA, USA
- Ragon Institute of MGH, MIT and Harvard University, Cambridge, MA, USA
- Department of Immunology, Massachusetts General Hospital, Boston, MA, USA
| | - Tyler Jacks
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA, USA
- Department of Biology, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Scott R Manalis
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA, USA.
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA.
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA.
- Broad Institute of MIT and Harvard, Cambridge, MA, USA.
- Ludwig Center at MIT's Koch Institute for Integrative Cancer Research, Cambridge, MA, USA.
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Abstract
In vivo flow cytometry (IVFC) was first designed to detect circulating cells in a mouse ear. It allows real-time monitoring of cells in peripheral blood with no need to draw blood. The IVFC field has made great progress during the last decade with the development of fluorescence, photoacoustic, and multiphoton microscopy. Moreover, the application of IVFC is no longer restricted to circulating cells. IVFC based on fluorescence and photoacoustic are most widely applied in biomedical research. Methods based on fluorescence are often used for object monitoring in superficial vessels, while methods based on photoacoustics have an advantage of label-free monitoring in deep vessels. In this chapter, we introduce technical points and key applications of IVFC. We focus on the principles, labeling strategies, sensitivity, and biomedical applications of the technology. In addition, we summarize this chapter and discuss important research directions of IVFC in the future.
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8
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Zhu X, Suo Y, Fu Y, Zhang F, Ding N, Pang K, Xie C, Weng X, Tian M, He H, Wei X. In vivo flow cytometry reveals a circadian rhythm of circulating tumor cells. LIGHT, SCIENCE & APPLICATIONS 2021; 10:110. [PMID: 34045431 PMCID: PMC8160330 DOI: 10.1038/s41377-021-00542-5] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2020] [Revised: 04/21/2021] [Accepted: 04/21/2021] [Indexed: 05/13/2023]
Abstract
Circulating tumor cells (CTCs) is an established biomarker of cancer metastasis. The circulation dynamics of CTCs are important for understanding the mechanisms underlying tumor cell dissemination. Although studies have revealed that the circadian rhythm may disrupt the growth of tumors, it is generally unclear whether the circadian rhythm controls the release of CTCs. In clinical examinations, the current in vitro methods for detecting CTCs in blood samples are based on a fundamental assumption that CTC counts in the peripheral blood do not change significantly over time, which is being challenged by recent studies. Since it is not practical to draw blood from patients repeatedly, a feasible strategy to investigate the circadian rhythm of CTCs is to monitor them by in vivo detection methods. Fluorescence in vivo flow cytometry (IVFC) is a powerful optical technique that is able to detect fluorescent circulating cells directly in living animals in a noninvasive manner over a long period of time. In this study, we applied fluorescence IVFC to monitor CTCs noninvasively in an orthotopic mouse model of human prostate cancer. We observed that CTCs exhibited stochastic bursts over cancer progression. The probability of the bursting activity was higher at early stages than at late stages. We longitudinally monitored CTCs over a 24-h period, and our results revealed striking daily oscillations in CTC counts that peaked at the onset of the night (active phase for rodents), suggesting that the release of CTCs might be regulated by the circadian rhythm.
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Affiliation(s)
- Xi Zhu
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University, 200030, Shanghai, China
| | - Yuanzhen Suo
- Biomedical Pioneering Innovation Center, Peking University, 100871, Beijing, China.
- School of Life Sciences, Peking University, 100871, Beijing, China.
| | - Yuting Fu
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University, 200030, Shanghai, China
| | - Fuli Zhang
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University, 200030, Shanghai, China
| | - Nan Ding
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University, 200030, Shanghai, China
| | - Kai Pang
- School of Instrument Science and Optoelectronics Engineering, Beijing Information Science and Technology University, 100192, Beijing, China
| | - Chengying Xie
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University, 200030, Shanghai, China
| | - Xiaofu Weng
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University, 200030, Shanghai, China
| | - Meilu Tian
- Biomedical Engineering Department, Peking University, 100081, Beijing, China
| | - Hao He
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University, 200030, Shanghai, China.
| | - Xunbin Wei
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University, 200030, Shanghai, China.
- Biomedical Engineering Department, Peking University, 100081, Beijing, China.
- Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Peking University Cancer Hospital and Institute, 100142, Beijing, China.
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9
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Weng X, Wei D, Zhu X, Tao L, Guo J, Pang K, Yang Z, Wei X. Real-time monitoring of single circulating tumor cells with a fluorescently labeled deoxy-glucose by in vivo flow cytometry. Cytometry A 2021; 99:586-592. [PMID: 33797159 DOI: 10.1002/cyto.a.24344] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2021] [Revised: 03/21/2021] [Accepted: 03/25/2021] [Indexed: 11/11/2022]
Abstract
Circulating tumor cells (CTCs) play an essential role in metastasis and serve as an important prognostic biomarker. The technology of CTC labeling and detection in vivo can greatly improve the research of cancer metastasis and therapy. However, there is no in vivo technology to detect CTCs in clinic. In this study, we demonstrate that 2-[N-(7-nitrobenz-2-oxa-1,3-diazol-4-yl) amino]-2-deoxy-d-glucose (2-NBDG), a 2-deoxy-glucose analog, can work in vivo to indicate CTCs and metastases fluorescently by direct intravenous injection. During the development of an implanted tumor in mice, the spontaneous CTCs released from the primary tumor into blood vessels can be labeled by 2-NBDG due to the abnormal metabolism of CTCs. The green fluorescence of 2-NBDG from CTCs is then noninvasively detected by an in vivo flow cytometry system. Due to the high uptake of glucose by tumor cells, the CTCs in mice can maintain a high 2-NBDG level and thus be distinguished by 2-NBDG fluorescence in vivo efficiently, enabling tumor detection in vivo like positron emission tomography (PET) but at the single-cell resolution. Our results suggest 2-NBDG, a glucose analog with high biosafety, holds promising potential in clinical applications, similar to the widely-used contrast medium 2-F18 -fluorodeoxyglucose in PET.
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Affiliation(s)
- Xiaofu Weng
- School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China
| | - Dan Wei
- Key Laboratory of Oceanographic Big Data Mining & Application of Zhejiang Province, School of Information Engineering, Zhejiang Ocean University, Zhejiang, China
| | - Xi Zhu
- School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China
| | - Lechan Tao
- School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China
| | - Jun Guo
- Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Peking University Cancer Hospital & Institute, Peking University Cancer Hospital, Beijing, China
| | - Kai Pang
- School of Instrument Science and Opto Electronics Engineering of Beijing Information Science & Technology University, Beijing, China
| | - Zhangru Yang
- Department of Radiation Oncology, Shanghai Chest Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Xunbin Wei
- School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China.,Biomedical Engineering Department, Peking University, Beijing, China.,Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Peking University Cancer Hospital & Institute, Peking University Cancer Hospital, Beijing, China
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10
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Zhang Y, Zhao J, Ding M, Su Y, Cui D, Jiang C, Zhao S, Jia G, Wang X, Ruan Y, Jing Y, Xia S, Han B. Loss of exosomal miR-146a-5p from cancer-associated fibroblasts after androgen deprivation therapy contributes to prostate cancer metastasis. JOURNAL OF EXPERIMENTAL & CLINICAL CANCER RESEARCH : CR 2020; 39:282. [PMID: 33317606 PMCID: PMC7734763 DOI: 10.1186/s13046-020-01761-1] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/13/2020] [Accepted: 11/03/2020] [Indexed: 12/29/2022]
Abstract
Background Androgen deprivation therapy (ADT) is the backbone of therapy for advanced prostate cancer (PCa). Despite the good initial response, castration resistance and metastatic progression will inevitably occur. Cancer-associated fibroblasts (CAFs) may be implicated in promoting metastasis of PCa after ADT. Our aim is to investigate the role and mechanism of CAFs-derived exosomes involving in metastasis of PCa after ADT. Methods PCa cells were co-cultured with exosomes derived from 10 nM dihydrotestosterone (DHT)-treated (simulating the high androgen level of prostate cancer microenvironment) or ethanol (ETOH) -treated (simulating the castration level of prostate cancer microenvironment after ADT) CAFs, and their migration and invasion differences under castration condition were examined both in vitro and in vivo. The miRNA profiles of exosomes derived from DHT-treated CAFs and matched ETOH-treated CAFs were analysed via next generation sequencing. The transfer of exosomal miR-146a-5p from CAFs to PCa cells was identified by fluorescent microscopy. The function and direct target gene of exosomal miR-146a-5p in PCa cells were confirmed through Transwell assays, luciferase reporter, and western blot. Results Compared with DHT-treated CAFs, exosomes derived from ETOH-treated CAFs dramatically increased migration and invasion of PCa cells under castration condition. MiR-146a-5p level in exosomes from ETOH-treated CAFs was significantly reduced. The loss of miR-146a-5p may strengthen the epithelial-mesenchymal transition (EMT) to accelerate cancer cells metastasis by modulating epidermal growth factor receptor (EGFR)/ERK pathway. Conclusions CAFs-derived exosomal miR-146a-5p confers metastasis in PCa cells under ADT through the EGFR/ERK pathway and it may present a new treatment for PCa.
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Affiliation(s)
- Yu Zhang
- Department of Urology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Wujin Road 85, Shanghai, 200080, China
| | - Jing Zhao
- Department of Urology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Wujin Road 85, Shanghai, 200080, China
| | - Mao Ding
- Department of Urology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Wujin Road 85, Shanghai, 200080, China
| | - Yiming Su
- Department of Urology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Wujin Road 85, Shanghai, 200080, China
| | - Di Cui
- Department of Urology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Wujin Road 85, Shanghai, 200080, China
| | - Chenyi Jiang
- Department of Urology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Wujin Road 85, Shanghai, 200080, China
| | - Sheng Zhao
- Department of Urology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Wujin Road 85, Shanghai, 200080, China
| | - Gaozhen Jia
- Department of Urology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Wujin Road 85, Shanghai, 200080, China
| | - Xiaohai Wang
- Department of Urology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Wujin Road 85, Shanghai, 200080, China
| | - Yuan Ruan
- Department of Urology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Wujin Road 85, Shanghai, 200080, China
| | - Yifeng Jing
- Department of Urology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Wujin Road 85, Shanghai, 200080, China
| | - Shujie Xia
- Department of Urology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Wujin Road 85, Shanghai, 200080, China. .,Institute of Urology, Shanghai Jiao Tong University, Shanghai, 200080, China.
| | - Bangmin Han
- Department of Urology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Wujin Road 85, Shanghai, 200080, China. .,Institute of Urology, Shanghai Jiao Tong University, Shanghai, 200080, China.
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11
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Fitzgerald JE, Byrd BK, Patil RA, Strawbridge RR, Davis SC, Bellini C, Niedre M. Heterogeneity of circulating tumor cell dissemination and lung metastases in a subcutaneous Lewis lung carcinoma model. BIOMEDICAL OPTICS EXPRESS 2020; 11:3633-3647. [PMID: 33014556 PMCID: PMC7510907 DOI: 10.1364/boe.395289] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Revised: 05/26/2020] [Accepted: 05/31/2020] [Indexed: 05/07/2023]
Abstract
Subcutaneous (s.c.) tumor models are widely used in pre-clinical cancer metastasis research. Despite this, the dynamics and natural progression of circulating tumor cells (CTCs) and CTC clusters (CTCCs) in peripheral blood are poorly understood in these models. In this work, we used a new technique called 'diffuse in vivo flow cytometry' (DiFC) to study CTC and CTCC dissemination in an s.c. Lewis lung carcinoma (LLC) model in mice. Tumors were grown in the rear flank and we performed DiFC up to 31 days after inoculation. At the study endpoint, lungs were excised and bioluminescence imaging (BLI) was performed to determine the extent of lung metastases. We also used fluorescence macro-cryotome imaging to visualize infiltration and growth of the primary tumor. DiFC revealed significant heterogeneity in CTC and CTCC numbers amongst all mice studied, despite using clonally identical LLC cells and tumor placement. Maximum DiFC count rates corresponded to 0.1 to 14 CTCs per mL of peripheral blood. In general, CTC numbers did not necessarily increase monotonically over time and were poorly correlated with tumor volume. However, there was a good correlation between CTC and CTCC numbers in peripheral blood and lung metastases. We attribute the differences in CTC numbers primarily due to growth patterns of the primary tumor. This study is one of the few reports of CTC shedding dynamics in sub-cutaneous metastasis models and underscores the value of in vivo methods for continuous, non-invasive CTC monitoring.
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Affiliation(s)
- Jessica E. Fitzgerald
- Department of Bioengineering, Northeastern University, 360 Huntington Avenue, Boston, MA 02115, USA
| | - Brook K. Byrd
- Thayer School of Engineering, Dartmouth College, 14 Engineering Drive, Hanover, NH 03755, USA
| | - Roshani A. Patil
- Department of Bioengineering, Northeastern University, 360 Huntington Avenue, Boston, MA 02115, USA
| | - Rendall R. Strawbridge
- Thayer School of Engineering, Dartmouth College, 14 Engineering Drive, Hanover, NH 03755, USA
| | - Scott C. Davis
- Thayer School of Engineering, Dartmouth College, 14 Engineering Drive, Hanover, NH 03755, USA
| | - Chiara Bellini
- Department of Bioengineering, Northeastern University, 360 Huntington Avenue, Boston, MA 02115, USA
| | - Mark Niedre
- Department of Bioengineering, Northeastern University, 360 Huntington Avenue, Boston, MA 02115, USA
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12
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Yu Q, Yao Y, Zhu X, Gao Y, Chen Y, Wang R, Xu P, Wei X, Jiang L. In Vivo Flow Cytometric Evaluation of Circulating Metastatic Pancreatic Tumor Cells after High-Intensity Focused Ultrasound Therapy. Cytometry A 2020; 97:900-908. [PMID: 32307867 PMCID: PMC7540359 DOI: 10.1002/cyto.a.24014] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2019] [Revised: 02/14/2020] [Accepted: 03/09/2020] [Indexed: 12/15/2022]
Abstract
We examined our hypothesis that high-intensity focused ultrasound (HIFU) treatment of pancreatic ductal adenocarcinoma (PDAC) in nude mice models may lead to an increased occurrence of hematogenous metastasis. The human PDAC cell line BxPC-3 transfected with mCherry was implanted into nude mice to establish orthotopic and subcutaneous xenograft (OX and SX) tumor models. Mice were exposed to HIFU when tumor sizes reached approximately 200-300 mm3 . The OX and SX tumor models were monitored continuously for tumor growth characteristics and hematogenous metastasis using in vivo flow cytometric (IVFC) detection of circulating tumor cells (CTCs) from the pancreas. We chose an appropriate mouse model to further examine whether or not HIFU increases the potential risk of hematogenous metastasis, using IVFC detection. Our results showed that the CTC number was greater in the OX model than in the SX model. The CTC number in the OX model increased gradually over time, whereas the CTC number in the SX model remained low. Therefore, the OX model was better for studying tumor metastasis by IVFC detection. We found significantly decreased CTC numbers and tumor volume after HIFU ablation. Our results showed the applicability of the PDAC OX tumor model for studying the occurrence of tumor metastasis due to the generation of CTCs. HIFU ablation substantially restricted PDAC hematogenous metastasis and provided effective tumor control locally. © 2020 The Authors. Cytometry Part A published by Wiley Periodicals Inc., on behalf of International Society for Advancement of Cytometry.
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Affiliation(s)
- Qian Yu
- Department of Ultrasonography, Shanghai Jiao Tong University Affiliated No. 6 Hospital, Shanghai, 200233, People's Republic of China.,Shanghai Institute of Ultrasound in Medicine, Shanghai, 200233, People's Republic of China
| | - Yijing Yao
- Department of Ultrasonography, Shanghai Jiao Tong University Affiliated No. 6 Hospital, Shanghai, 200233, People's Republic of China.,Shanghai Institute of Ultrasound in Medicine, Shanghai, 200233, People's Republic of China
| | - Xi Zhu
- Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, 200030, People's Republic of China
| | - Yihui Gao
- Department of Ultrasonography, Shanghai Jiao Tong University Affiliated No. 6 Hospital, Shanghai, 200233, People's Republic of China.,Shanghai Institute of Ultrasound in Medicine, Shanghai, 200233, People's Republic of China
| | - Yini Chen
- Department of Ultrasonography, Shanghai Jiao Tong University Affiliated No. 6 Hospital, Shanghai, 200233, People's Republic of China.,Shanghai Institute of Ultrasound in Medicine, Shanghai, 200233, People's Republic of China
| | - Rui Wang
- Department of Ultrasonography, Shanghai Jiao Tong University Affiliated No. 6 Hospital, Shanghai, 200233, People's Republic of China.,Shanghai Institute of Ultrasound in Medicine, Shanghai, 200233, People's Republic of China
| | - Pingping Xu
- Department of Ultrasonography, Shanghai Jiao Tong University Affiliated No. 6 Hospital, Shanghai, 200233, People's Republic of China.,Shanghai Institute of Ultrasound in Medicine, Shanghai, 200233, People's Republic of China
| | - Xunbin Wei
- Med-X Research Institute and School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, 200030, People's Republic of China.,Beijing Advanced Innovation Center for Biomedical Engineering, Beihang University, Beijing, 100083, People's Republic of China
| | - Lixin Jiang
- Department of Ultrasonography, Shanghai Jiao Tong University Affiliated No. 6 Hospital, Shanghai, 200233, People's Republic of China.,Shanghai Institute of Ultrasound in Medicine, Shanghai, 200233, People's Republic of China
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13
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Wei D, Zeng X, Yang Z, Zhou Q, Weng X, He H, Gao W, Gu Z, Wei X. Visualizing Interactions of Circulating Tumor Cell and Dendritic Cell in the Blood Circulation Using In Vivo Imaging Flow Cytometry. IEEE Trans Biomed Eng 2019; 66:2521-2526. [DOI: 10.1109/tbme.2019.2891068] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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14
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Suo Y, Gu Z, Wei X. Advances of In Vivo Flow Cytometry on Cancer Studies. Cytometry A 2019; 97:15-23. [DOI: 10.1002/cyto.a.23851] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2019] [Revised: 05/27/2019] [Accepted: 06/14/2019] [Indexed: 12/24/2022]
Affiliation(s)
- Yuanzhen Suo
- Biomedical Pioneering Innovation CenterPeking University Beijing China
- School of Life SciencesPeking University Beijing China
| | - Zhenqin Gu
- Department of Urology, Xinhua HospitalShanghai Jiao Tong University School of Medicine Shanghai China
| | - Xunbin Wei
- Med‐X Research Institute and School of Biomedical EngineeringShanghai Jiao Tong University Shanghai China
- School of PhysicsFoshan University Foshan 52800 China
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15
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Silva ED, Oliveira BC, Oliveira AP, Santos WJT, Diniz GT, de Melo Neto OP, Costa CHN, Silva MRB, Andrade LD, Medeiros ZM, Pereira VRA. Performance evaluation of anti-fixed Leishmania infantum promastigotes immunoglobulin G (IgG) detected by flow cytometry as a diagnostic tool for visceral Leishmaniasis. J Immunol Methods 2019; 469:18-25. [PMID: 30817916 DOI: 10.1016/j.jim.2019.02.009] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2018] [Revised: 02/08/2019] [Accepted: 02/22/2019] [Indexed: 12/30/2022]
Abstract
Visceral Leishmaniasis (VL) is a severe disease, caused by the protozoans Leishmania infantum and L. donovani that is widely diagnosed using serological tools. These, however, have limitations in performance that limit their use for the correct identification of the cases. This study aimed to evaluate the performance of flow cytometry with fixed parasites for VL diagnosis, comparing it with four other serological tests. Samples from two endemic VL regions in Brazil, diagnosed by direct examination (DG1) and by at least two or one standard serological test (DG2 and DG3, respectively), as well as patients with chronic Chagas' disease (CG1) and healthy controls (CG2) were used in this study. The flow cytometry results were expressed as levels of IgG reactivity, based on the percentage of positive fluorescent parasites (PPFP). Using a 1:4096 serum dilution, a ROC curve analysis of the serum titration on flow cytometry has indicated a PPFP of 2% as the cutoff point to segregate positive and negative results. In the present study, flow cytometry had the best performance for DG1 (sensitivity of 96%) while rK39 (imunocromagraphic rapid test) and DAT (Direct agglutination test) were also associated with high sensitivity and specificity. The substantial agreement and kappa indexes observed suggested similar performances between these two tests and flow cytometry. IFAT (Immunofluorescent antibody test) and ELISA (Enzyme-linked immunosorbent assay) had lower performances and the lower values of agreement with flow cytometry. Together, these findings suggest that although adjustments are needed in order to reduce cross reactivity with other trypanosomatids, flow cytometry has the potential to be a safe serological alternative for the diagnosis of VL.
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Affiliation(s)
- Elis D Silva
- Fundação Oswaldo Cruz (Fiocruz-Pernambuco), Instituto Aggeu Magalhães, Recife, Pernambuco, Brazil.
| | - Beatriz C Oliveira
- Fundação Oswaldo Cruz (Fiocruz-Pernambuco), Instituto Aggeu Magalhães, Recife, Pernambuco, Brazil
| | - Andresa P Oliveira
- Fundação Oswaldo Cruz (Fiocruz-Pernambuco), Instituto Aggeu Magalhães, Recife, Pernambuco, Brazil
| | - Wagner J T Santos
- Fundação Oswaldo Cruz (Fiocruz-Pernambuco), Instituto Aggeu Magalhães, Recife, Pernambuco, Brazil
| | - George T Diniz
- Fundação Oswaldo Cruz (Fiocruz-Pernambuco), Instituto Aggeu Magalhães, Recife, Pernambuco, Brazil
| | - Osvaldo P de Melo Neto
- Fundação Oswaldo Cruz (Fiocruz-Pernambuco), Instituto Aggeu Magalhães, Recife, Pernambuco, Brazil
| | - Carlos H N Costa
- Instituto de Doenças Tropicais Natan Portella (IDTNP), Teresina, Piaui, Brazil
| | | | - Luiz D Andrade
- Fundação Oswaldo Cruz (Fiocruz-Pernambuco), Instituto Aggeu Magalhães, Recife, Pernambuco, Brazil
| | - Zulma M Medeiros
- Fundação Oswaldo Cruz (Fiocruz-Pernambuco), Instituto Aggeu Magalhães, Recife, Pernambuco, Brazil; Faculdade de Ciências Médicas, Universidade de Pernambuco, Recife, Brazil
| | - Valéria R A Pereira
- Fundação Oswaldo Cruz (Fiocruz-Pernambuco), Instituto Aggeu Magalhães, Recife, Pernambuco, Brazil
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