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An Y, Wang H, Li J, Li G, Ma X, Du Y, Tian J. Reconstruction based on adaptive group least angle regression for fluorescence molecular tomography. BIOMEDICAL OPTICS EXPRESS 2023; 14:2225-2239. [PMID: 37206151 PMCID: PMC10191665 DOI: 10.1364/boe.486451] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2023] [Revised: 03/17/2023] [Accepted: 03/27/2023] [Indexed: 05/21/2023]
Abstract
Fluorescence molecular tomography can combine two-dimensional fluorescence imaging with anatomical information to reconstruct three-dimensional images of tumors. Reconstruction based on traditional regularization with tumor sparsity priors does not take into account that tumor cells form clusters, so it performs poorly when multiple light sources are used. Here we describe reconstruction based on an "adaptive group least angle regression elastic net" (AGLEN) method, in which local spatial structure correlation and group sparsity are integrated with elastic net regularization, followed by least angle regression. The AGLEN method works iteratively using the residual vector and a median smoothing strategy in order to adaptively obtain a robust local optimum. The method was verified using numerical simulations as well as imaging of mice bearing liver or melanoma tumors. AGLEN reconstruction performed better than state-of-the-art methods with different sizes of light sources at different distances from the sample and in the presence of Gaussian noise at 5-25%. In addition, AGLEN-based reconstruction accurately imaged tumor expression of cell death ligand-1, which can guide immunotherapy.
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Affiliation(s)
- Yu An
- the Key Laboratory of Big Data-Based Precision Medicine (Beihang University), Ministry of Industry and Information Technology of the People's Republic of China, School of Engineering Medicine, Beihang University, Beijing, 100191, China
| | - Hanfan Wang
- the CAS Key Laboratory of Molecular Imaging, Institute of Automation, Chinese Academy of Sciences, Beijing, 100190, China
| | - Jiaqian Li
- the Key Laboratory of Big Data-Based Precision Medicine (Beihang University), Ministry of Industry and Information Technology of the People's Republic of China, School of Engineering Medicine, Beihang University, Beijing, 100191, China
| | - Guanghui Li
- the Key Laboratory of Big Data-Based Precision Medicine (Beihang University), Ministry of Industry and Information Technology of the People's Republic of China, School of Engineering Medicine, Beihang University, Beijing, 100191, China
| | - Xiaopeng Ma
- School of Control Science and Engineering, Shandong University, Jinan, Shandong 250061, China
| | - Yang Du
- the CAS Key Laboratory of Molecular Imaging, Institute of Automation, Chinese Academy of Sciences, Beijing, 100190, China
| | - Jie Tian
- the Key Laboratory of Big Data-Based Precision Medicine (Beihang University), Ministry of Industry and Information Technology of the People's Republic of China, School of Engineering Medicine, Beihang University, Beijing, 100191, China
- the CAS Key Laboratory of Molecular Imaging, Institute of Automation, Chinese Academy of Sciences, Beijing, 100190, China
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Rojas-Torres M, Sánchez-Gomar I, Rosal-Vela A, Beltrán-Camacho L, Eslava-Alcón S, Alonso-Piñeiro JÁ, Martín-Ramírez J, Moreno-Luna R, Durán-Ruiz MC. Assessment of endothelial colony forming cells delivery routes in a murine model of critical limb threatening ischemia using an optimized cell tracking approach. Stem Cell Res Ther 2022; 13:266. [PMID: 35729651 PMCID: PMC9210810 DOI: 10.1186/s13287-022-02943-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Accepted: 04/07/2022] [Indexed: 01/15/2023] Open
Abstract
Background Endothelial colony forming cells (ECFCs), alone or in combination with mesenchymal stem cells, have been selected as potential therapeutic candidates for critical limb-threatening ischemia (CLTI), mainly for those patients considered as “no-option,” due to their capability to enhance revascularization and perfusion recovery of ischemic tissues. Nevertheless, prior to translating cell therapy to the clinic, biodistribution assays are required by regulatory guidelines to ensure biosafety as well as to discard undesired systemic translocations. Different approaches, from imaging technologies to qPCR-based methods, are currently applied. Methods In the current study, we have optimized a cell-tracking assay based on DiR fluorescent cell labeling and near-infrared detection for in vivo and ex vivo assays. Briefly, an improved protocol for DiR staining was set up, by incubation of ECFCs with 6.67 µM DiR and intensive washing steps prior cell administration. The minimal signal detected for the residual DiR, remaining after these washes, was considered as a baseline signal to estimate cell amounts correlated to the DiR intensity values registered in vivo. Besides, several assays were also performed to determine any potential effect of DiR over ECFCs functionality. Furthermore, the optimized protocol was applied in combination with qPCR amplification of specific human Alu sequences to assess the final distribution of ECFCs after intramuscular or intravenous administration to a murine model of CLTI. Results The optimized DiR labeling protocol indicated that ECFCs administered intramuscularly remained mainly within the hind limb muscle while cells injected intravenously were found in the spleen, liver and lungs. Conclusion Overall, the combination of DiR labeling and qPCR analysis in biodistribution assays constitutes a highly sensitive approach to systemically track cells in vivo. Thereby, human ECFCs administered intramuscularly to CLTI mice remained locally within the ischemic tissues, while intravenously injected cells were found in several organs. Our data corroborate the need to perform biodistribution assays in order to define specific parameters such as the optimal delivery route for ECFCs before their application into the clinic. Supplementary Information The online version contains supplementary material available at 10.1186/s13287-022-02943-8.
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Affiliation(s)
- Marta Rojas-Torres
- Biomedicine, Biotechnology and Public Health Department, Cádiz University, Cádiz, Spain.,Institute of Research and Innovation in Biomedical Sciences of Cádiz (INiBICA), Cádiz, Spain
| | - Ismael Sánchez-Gomar
- Biomedicine, Biotechnology and Public Health Department, Cádiz University, Cádiz, Spain.,Institute of Research and Innovation in Biomedical Sciences of Cádiz (INiBICA), Cádiz, Spain
| | - Antonio Rosal-Vela
- Biomedicine, Biotechnology and Public Health Department, Cádiz University, Cádiz, Spain.,Institute of Research and Innovation in Biomedical Sciences of Cádiz (INiBICA), Cádiz, Spain
| | - Lucía Beltrán-Camacho
- Biomedicine, Biotechnology and Public Health Department, Cádiz University, Cádiz, Spain.,Institute of Research and Innovation in Biomedical Sciences of Cádiz (INiBICA), Cádiz, Spain
| | - Sara Eslava-Alcón
- Biomedicine, Biotechnology and Public Health Department, Cádiz University, Cádiz, Spain.,Institute of Research and Innovation in Biomedical Sciences of Cádiz (INiBICA), Cádiz, Spain
| | - José Ángel Alonso-Piñeiro
- Biomedicine, Biotechnology and Public Health Department, Cádiz University, Cádiz, Spain.,Institute of Research and Innovation in Biomedical Sciences of Cádiz (INiBICA), Cádiz, Spain
| | | | - Rafael Moreno-Luna
- Laboratory of Neuroinflammation, Hospital Nacional de Paraplejicos, SESCAM, Toledo, Spain
| | - Mª Carmen Durán-Ruiz
- Biomedicine, Biotechnology and Public Health Department, Cádiz University, Cádiz, Spain. .,Institute of Research and Innovation in Biomedical Sciences of Cádiz (INiBICA), Cádiz, Spain.
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Ao H, Wang Z, Lu L, Ma H, Li H, Fu J, Li M, Han M, Guo Y, Wang X. Enhanced tumor accumulation and therapeutic efficacy of liposomal drugs through over-threshold dosing. J Nanobiotechnology 2022; 20:137. [PMID: 35292036 PMCID: PMC8922779 DOI: 10.1186/s12951-022-01349-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2021] [Accepted: 03/02/2022] [Indexed: 12/12/2022] Open
Abstract
Background Most intravenously administered drug-loaded nanoparticles are taken up by liver Kupffer cells, and only a small portion can accumulate at the tumor, resulting in an unsatisfactory therapeutic efficacy and side effects for chemotherapeutic agents. Tumor-targeted drug delivery proves to be the best way to solve this problem; however, the complex synthesis, or surface modification process, together with the astonishing high cost make its clinical translation nearly impossible. Methods Referring to Ouyang’s work and over-threshold dosing theory in general, blank PEGylated liposomes (PEG-Lipo) were prepared and used as tumor delivery enhancers to determine whether they could significantly enhance the tumor accumulation and in vivo antitumor efficacy of co-injected liposomal ACGs (PEG-ACGs-Lipo), a naturally resourced chemotherapeutic. Here, the phospholipid dose was used as an indicator of the number of liposomes particles with similar particle sizes, and the liposomes was labelled with DiR, a near-red fluorescent probe, to trace their in vivo biodistribution. Two mouse models, 4T1-bearing and U87-bearing, were employed for in vivo examination. Results PEG-Lipo and PEG-ACGs-Lipo had similar diameters. At a low-threshold dose (12 mg/kg equivalent phospholipids), PEG-Lipo was mainly distributed in the liver rather than in the tumor, with the relative tumor targeting index (RTTI) being ~ 0.38 at 72 h after administration. When over-threshold was administered (50 mg/kg or 80 mg/kg of equivalent phospholipids), a much higher and quicker drug accumulation in tumors and a much lower drug accumulation in the liver were observed, with the RTTI increasing to ~ 0.9. The in vivo antitumor study in 4T1 tumor-bearing mice showed that, compared to PEG-ACGs-Lipo alone (2.25 mg/kg phospholipids), the co-injection of a large dose of blank PEG-Lipo (50 mg/kg of phospholipids) significantly reduced the tumor volume of the mice by 22.6% (P < 0.05) and enhanced the RTTI from 0.41 to 1.34. The intravenous injection of a low drug loading content (LDLC) of liposomal ACGs (the same dose of ACGs at 50 mg/kg of equivalent phospholipids) achieved a similar tumor inhibition rate (TIR) to that of co-injection. In the U87 MG tumor-bearing mouse model, co-injection of the enhancer also significantly promoted the TIR (83.32% vs. 66.80%, P < 0.05) and survival time of PEG-ACGs-Lipo. Conclusion An over-threshold dosing strategy proved to be a simple and feasible way to enhance the tumor delivery and antitumor efficacy of nanomedicines and was benefited to benefit their clinical result, especially for liposomal drugs. Graphical Abstract ![]()
Supplementary Information The online version contains supplementary material available at 10.1186/s12951-022-01349-1.
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Affiliation(s)
- Hui Ao
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, No. 151, Malianwa North Road, Haidian District, Beijing, 100193, People's Republic of China
| | - Zhuo Wang
- College of Pharmacy, Heilongjiang University of Chinese Medicine, No. 24, Heping Road, Xiangfang District, Harbin, 150040, People's Republic of China
| | - Likang Lu
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, No. 151, Malianwa North Road, Haidian District, Beijing, 100193, People's Republic of China
| | - Hongwei Ma
- College of Pharmacy, Heilongjiang University of Chinese Medicine, No. 24, Heping Road, Xiangfang District, Harbin, 150040, People's Republic of China
| | - Haowen Li
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, No. 151, Malianwa North Road, Haidian District, Beijing, 100193, People's Republic of China
| | - Jingxin Fu
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, No. 151, Malianwa North Road, Haidian District, Beijing, 100193, People's Republic of China
| | - Manzhen Li
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, No. 151, Malianwa North Road, Haidian District, Beijing, 100193, People's Republic of China
| | - Meihua Han
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, No. 151, Malianwa North Road, Haidian District, Beijing, 100193, People's Republic of China
| | - Yifei Guo
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, No. 151, Malianwa North Road, Haidian District, Beijing, 100193, People's Republic of China
| | - Xiangtao Wang
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, No. 151, Malianwa North Road, Haidian District, Beijing, 100193, People's Republic of China.
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An Y, Bian C, Yan D, Wang H, Wang Y, Du Y, Tian J. A Fast and Automated FMT/XCT Reconstruction Strategy Based on Standardized Imaging Space. IEEE TRANSACTIONS ON MEDICAL IMAGING 2022; 41:657-666. [PMID: 34648436 DOI: 10.1109/tmi.2021.3120011] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
The traditional finite element method-based fluorescence molecular tomography (FMT)/ X-ray computed tomography (XCT) imaging reconstruction suffers from complicated mesh generation and dual-modality image data fusion, which limits the application of in vivo imaging. To solve this problem, a novel standardized imaging space reconstruction (SISR) method for the quantitative determination of fluorescent probe distributions inside small animals was developed. In conjunction with a standardized dual-modality image data fusion technology, and novel reconstruction strategy based on Laplace regularization and L1-fused Lasso method, the in vivo distribution can be calculated rapidly and accurately, which enables standardized and algorithm-driven data process. We demonstrated the method's feasibility through numerical simulations and quantitatively monitored in vivo programmed death ligand 1 (PD-L1) expression in mouse tumor xenografts, and the results demonstrate that our proposed SISR can increase data throughput and reproducibility, which helps to realize the dynamically and accurately in vivo imaging.
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Tian Y, Shi P, Zhou Y, Yuan R, Hu Z, Tan Y, Ma G, Yang L, Jiang H. DiR-labeled tolerogenic dendritic cells for targeted imaging in collagen- induced arthritis rats. Int Immunopharmacol 2021; 91:107273. [PMID: 33360828 DOI: 10.1016/j.intimp.2020.107273] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2020] [Revised: 11/13/2020] [Accepted: 12/01/2020] [Indexed: 01/06/2023]
Abstract
Tolerogenic dendritic cells (tolDCs) are immunosuppressive cells and play an important role in rheumatoid arthritis (RA) as immunotherapeutic tools. We aimed to investigate whether allogeneic tolDCs (allo-tolDCs) and autologous tolDCs (auto-tolDCs) had long-time tolerogenic potential in vivo and improve arthritis in collagen-induced arthritis (CIA) rats. TolDCs were induced by NF-κB Decoy ODN, and loaded with Bovine Type II collagen (CII- loaded tolDCs) and identified by flow cytometry, and labeled with DiR and injected into CIA rats. The biodistribution of DiR-labeled tolDCs was monitored by IVIS imaging at different time points. Major organs were harvested and analyzed by ex-in vivo cell imaging. The tolDCs were successfully constructed, along with expressing low levels of CD80 and CD86 compared to DCs. The fluorescent signals of all DiR (+) groups were observed at least 25 days, and as long as 35 days. DiR (+) CII- loaded allo-and auto-tolDCs at post injection mainly distributed in the chest and abdomen and gradually moved to limb joints over time. The allo- and auto-tolDCs decreased the expression of IFN-γ and IL-2 in CIA rats with different severity compared to CIA rats without tolDCs treatment, while significantly increased the expression of IL-4 and IL-10. Additionally, these tolDCs ameliorated the ankle joints injury in CIA rats with different severity. The both allo- and auto-tolDCs showed long-time tolerogenic potential in vivo and ameliorated arthritis in CIA rats with different severity.
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Affiliation(s)
- Yaling Tian
- School of Clinical Laboratory Science, Guizhou Medical University, Guiyang 550000, Guizhou, China; Department of Clinical Laboratory, Minda Hospital affiliated Hubei Minzu University, Enshi 445000, Hubei, China
| | - Ping Shi
- Department of Microbiology and Immunology, Affiliated Hospital of Guizhou Medical University, Guiyang 550000, Guizhou, China
| | - Yan Zhou
- School of Clinical Laboratory Science, Guizhou Medical University, Guiyang 550000, Guizhou, China
| | - Rui Yuan
- Department of Microbiology and Immunology, Affiliated Hospital of Guizhou Medical University, Guiyang 550000, Guizhou, China
| | - Zhicheng Hu
- Department of Microbiology and Immunology, Affiliated Hospital of Guizhou Medical University, Guiyang 550000, Guizhou, China
| | - Yan Tan
- Affiliated Tianyou Hospital of Wuhan University of Science & Technology, Wuhan 430000, Hubei, China
| | - Guilan Ma
- School of Clinical Laboratory Science, Guizhou Medical University, Guiyang 550000, Guizhou, China
| | - Lei Yang
- Department of Microbiology and Immunology, Affiliated Hospital of Guizhou Medical University, Guiyang 550000, Guizhou, China
| | - Hongmei Jiang
- School of Clinical Laboratory Science, Guizhou Medical University, Guiyang 550000, Guizhou, China; Department of Microbiology and Immunology, Affiliated Hospital of Guizhou Medical University, Guiyang 550000, Guizhou, China.
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Immunity-and-matrix-regulatory cells derived from human embryonic stem cells safely and effectively treat mouse lung injury and fibrosis. Cell Res 2020; 30:794-809. [PMID: 32546764 PMCID: PMC7296193 DOI: 10.1038/s41422-020-0354-1] [Citation(s) in RCA: 49] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Accepted: 05/29/2020] [Indexed: 01/16/2023] Open
Abstract
Lung injury and fibrosis represent the most significant outcomes of severe and acute lung disorders, including COVID-19. However, there are still no effective drugs to treat lung injury and fibrosis. In this study, we report the generation of clinical-grade human embryonic stem cells (hESCs)-derived immunity- and matrix-regulatory cells (IMRCs) produced under good manufacturing practice requirements, that can treat lung injury and fibrosis in vivo. We generate IMRCs by sequentially differentiating hESCs with serum-free reagents. IMRCs possess a unique gene expression profile distinct from that of umbilical cord mesenchymal stem cells (UCMSCs), such as higher expression levels of proliferative, immunomodulatory and anti-fibrotic genes. Moreover, intravenous delivery of IMRCs inhibits both pulmonary inflammation and fibrosis in mouse models of lung injury, and significantly improves the survival rate of the recipient mice in a dose-dependent manner, likely through paracrine regulatory mechanisms. IMRCs are superior to both primary UCMSCs and the FDA-approved drug pirfenidone, with an excellent efficacy and safety profile in mice and monkeys. In light of public health crises involving pneumonia, acute lung injury and acute respiratory distress syndrome, our findings suggest that IMRCs are ready for clinical trials on lung disorders.
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7
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Huang W, Wang K, An Y, Meng H, Gao Y, Xiong Z, Yan H, Wang Q, Cai X, Yang X, Zhang B, Chen Q, Yang X, Tian J, Zhang S. In vivo three-dimensional evaluation of tumour hypoxia in nasopharyngeal carcinomas using FMT-CT and MSOT. Eur J Nucl Med Mol Imaging 2019; 47:1027-1038. [PMID: 31705175 PMCID: PMC7101302 DOI: 10.1007/s00259-019-04526-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2019] [Accepted: 09/05/2019] [Indexed: 11/26/2022]
Abstract
Purpose Accurate evaluation of hypoxia is particularly important in patients with nasopharyngeal carcinoma (NPC) undergoing radiotherapy. The aim of this study was to propose a novel imaging strategy for quantitative three-dimensional (3D) evaluation of hypoxia in a small animal model of NPC. Methods A carbonic anhydrase IX (CAIX)-specific molecular probe (CAIX-800) was developed for imaging of hypoxia. Mouse models of subcutaneous, orthotopic, and spontaneous lymph node metastasis from NPC (5 mice per group) were established to assess the imaging strategy. A multi-modality imaging method that consisted of a hybrid combination of fluorescence molecular tomography-computed tomography (FMT-CT) and multispectral optoacoustic tomography (MSOT) was used for 3D quantitative evaluation of tumour hypoxia. Magnetic resonance imaging, histological examination, and immunohistochemical analysis were used as references for comparison and validation. Results In the early stage of NPC (2 weeks after implantation), FMT-CT enabled precise 3D localisation of the hypoxia biomarker with high sensitivity. At the advanced stage (6 weeks after implantation), MSOT allowed multispectral analysis of the biomarker and haemoglobin molecules with high resolution. The combination of high sensitivity and high resolution from FMT-CT and MSOT could not only detect hypoxia in small-sized NPCs but also visualise the heterogeneity of hypoxia in 3D. Conclusions Integration of FMT-CT and MSOT could allow comprehensive and quantifiable evaluation of hypoxia in NPC. These findings may potentially benefit patients with NPC undergoing radiotherapy in the future. A novel multimodality imaging strategy for three-dimensional evaluation of tumour hypoxia in an orthotopic model of nasopharyngeal carcinoma. ![]()
Electronic supplementary material The online version of this article (10.1007/s00259-019-04526-x) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Wenhui Huang
- Medical Imaging Center, the First Affiliated Hospital, Jinan University, No. 163, Huangpu West Road, Tianhe District, Guangzhou, Guangdong, 510632, China.,CAS Key Laboratory of Molecular Imaging, Institute of Automation Chinese Academy of Sciences, No. 95 Zhongguancun East Road, Haidian District, Beijing, 100190, China
| | - Kun Wang
- CAS Key Laboratory of Molecular Imaging, Institute of Automation Chinese Academy of Sciences, No. 95 Zhongguancun East Road, Haidian District, Beijing, 100190, China
| | - Yu An
- CAS Key Laboratory of Molecular Imaging, Institute of Automation Chinese Academy of Sciences, No. 95 Zhongguancun East Road, Haidian District, Beijing, 100190, China
| | - Hui Meng
- CAS Key Laboratory of Molecular Imaging, Institute of Automation Chinese Academy of Sciences, No. 95 Zhongguancun East Road, Haidian District, Beijing, 100190, China
| | - Yuan Gao
- CAS Key Laboratory of Molecular Imaging, Institute of Automation Chinese Academy of Sciences, No. 95 Zhongguancun East Road, Haidian District, Beijing, 100190, China
| | - Zhiyuan Xiong
- Medical Imaging Center, the First Affiliated Hospital, Jinan University, No. 163, Huangpu West Road, Tianhe District, Guangzhou, Guangdong, 510632, China.,Department of Chemical and Bio-molecular Engineering, The university of Melbourne, Melbourne, Victoria, 3010, Australia
| | - Hao Yan
- Engineering Laboratory for Functionalized Carbon Materials, Graduate School at Shenzhen, Tsinghua University, Shenzhen, 518055, China
| | - Qian Wang
- Department of Diagnostic Imaging, National Cancer Center/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100021, China
| | - Xuekang Cai
- Department of Nuclear Medicine, Peking University First Hospital, No. 8 Xishiku Road, Xicheng District, Beijing, 100034, China
| | - Xin Yang
- CAS Key Laboratory of Molecular Imaging, Institute of Automation Chinese Academy of Sciences, No. 95 Zhongguancun East Road, Haidian District, Beijing, 100190, China
| | - Bin Zhang
- Medical Imaging Center, the First Affiliated Hospital, Jinan University, No. 163, Huangpu West Road, Tianhe District, Guangzhou, Guangdong, 510632, China
| | - Qiuying Chen
- Medical Imaging Center, the First Affiliated Hospital, Jinan University, No. 163, Huangpu West Road, Tianhe District, Guangzhou, Guangdong, 510632, China
| | - Xing Yang
- Department of Nuclear Medicine, Peking University First Hospital, No. 8 Xishiku Road, Xicheng District, Beijing, 100034, China.
| | - Jie Tian
- CAS Key Laboratory of Molecular Imaging, Institute of Automation Chinese Academy of Sciences, No. 95 Zhongguancun East Road, Haidian District, Beijing, 100190, China. .,Beijing Advanced Innovation Center for Big Data-Based Precision Medicine, Beihang University, Beijing, 100191, China.
| | - Shuixing Zhang
- Medical Imaging Center, the First Affiliated Hospital, Jinan University, No. 163, Huangpu West Road, Tianhe District, Guangzhou, Guangdong, 510632, China.
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Li X, An G, Wang Y, Liang D, Zhu Z, Tian L. Targeted migration of bone marrow mesenchymal stem cells inhibits silica-induced pulmonary fibrosis in rats. Stem Cell Res Ther 2018; 9:335. [PMID: 30514375 PMCID: PMC6280342 DOI: 10.1186/s13287-018-1083-y] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2018] [Revised: 10/24/2018] [Accepted: 11/19/2018] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND Silicosis is a common occupational disease, characterized by silicotic nodules and diffuse pulmonary fibrosis. We demonstrated an anti-fibrotic effect of bone marrow mesenchymal stem cells (BMSCs) in silica-induced lung fibrosis. In the present study, we sought to clarify the homing ability of BMSCs and the specific mechanisms for their effects. METHODS AND RESULTS The biodistribution of BMSCs was identified by near-infrared fluorescence (NIRF) imaging in vivo and in vitro. The results showed that BMSCs labeled with NIR-DiR dyes targeted silica-injured lung tissue, wherein they reached a peak at 6 h post-injection and declined dramatically by day 3. Based on these findings, a second injection of BMSCs was administered 3 days after the first injection. The injected BMSCs migrated to the injured lungs, but did not undergo transformation into specific lung cell types. Interestingly, the injection of BMSC-conditioned medium (BMSCs-CM) significantly attenuated silica-induced pulmonary fibrosis. The collagen deposition and number of nodules were decreased in lung tissues of BMSCs-CM-treated rats. In parallel with these findings, the mRNA levels of collagen I, collagen III, and fibronectin, and the content of transforming growth factor (TGF)-β1 and hydroxyproline were decreased in the BMSCs-CM-treated group compared with the silica group. In addition, alveolar epithelial markers were upregulated by BMSCs-CM treatment. CONCLUSIONS BMSCs migrated to injured areas of the lung after silica instillation and attenuated pulmonary fibrosis. The anti-fibrotic effects of BMSCs were mainly exerted in paracrine manner, rather than through their ability to undergo differentiation.
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Affiliation(s)
- Xiaoli Li
- Beijing Tropical Medicine Research Institute, Beijing Friendship Hospital, Capital Medical University, Beijing, China.,Department of Occupational and Environmental Health, School of Public Health, Capital Medical University, No. 10, Xi toutiao outside You anmen, Beijing, 100069, China
| | - Guoliang An
- Department of Occupational and Environmental Health, School of Public Health, Capital Medical University, No. 10, Xi toutiao outside You anmen, Beijing, 100069, China
| | - Yan Wang
- Department of Occupational and Environmental Health, School of Public Health, Capital Medical University, No. 10, Xi toutiao outside You anmen, Beijing, 100069, China
| | - Di Liang
- Department of Occupational and Environmental Health, School of Public Health, Capital Medical University, No. 10, Xi toutiao outside You anmen, Beijing, 100069, China
| | - Zhonghui Zhu
- Department of Occupational and Environmental Health, School of Public Health, Capital Medical University, No. 10, Xi toutiao outside You anmen, Beijing, 100069, China
| | - Lin Tian
- Department of Occupational and Environmental Health, School of Public Health, Capital Medical University, No. 10, Xi toutiao outside You anmen, Beijing, 100069, China.
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Zhang S, Ma X, Wang Y, Wu M, Meng H, Chai W, Wang X, Wei S, Tian J. Robust Reconstruction of Fluorescence Molecular Tomography Based on Sparsity Adaptive Correntropy Matching Pursuit Method for Stem Cell Distribution. IEEE TRANSACTIONS ON MEDICAL IMAGING 2018; 37:2176-2184. [PMID: 29993826 DOI: 10.1109/tmi.2018.2825102] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Fluorescence molecular tomography (FMT), as a promising imaging modality in preclinical research, can obtain the three-dimensional (3-D) position information of the stem cell in mice. However, because of the ill-posed nature and sensitivity to noise of the inverse problem, it is a challenge to develop a robust reconstruction method, which can accurately locate the stem cells and define the distribution. In this paper, we proposed a sparsity adaptive correntropy matching pursuit (SACMP) method. SACMP method is independent on the noise distribution of measurements and it assigns small weights on severely corrupted entries of data and large weights on clean ones adaptively. These properties make it more suitable for in vivo experiment. To analyze the performance in terms of robustness and practicability of SACMP, we conducted numerical simulation and in vivo mice experiments. The results demonstrated that the SACMP method obtained the highest robustness and accuracy in locating stem cells and depicting stem cell distribution compared with stagewise orthogonal matching pursuit and sparsity adaptive subspace pursuit reconstruction methods. To the best of our knowledge, this is the first study that acquired such accurate and robust FMT distribution reconstruction for stem cell tracking in mice brain. This promotes the application of FMT in locating stem cell and distribution reconstruction in practical mice brain injury models.
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An Y, Wang K, Tian J. Recent methodology advances in fluorescence molecular tomography. Vis Comput Ind Biomed Art 2018; 1:1. [PMID: 32240398 PMCID: PMC7098398 DOI: 10.1186/s42492-018-0001-6] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2018] [Accepted: 06/30/2018] [Indexed: 12/26/2022] Open
Abstract
Molecular imaging (MI) is a novel imaging discipline that has been continuously developed in recent years. It combines biochemistry, multimodal imaging, biomathematics, bioinformatics, cell & molecular physiology, biophysics, and pharmacology, and it provides a new technology platform for the early diagnosis and quantitative analysis of diseases, treatment monitoring and evaluation, and the development of comprehensive physiology. Fluorescence Molecular Tomography (FMT) is a type of optical imaging modality in MI that captures the three-dimensional distribution of fluorescence within a biological tissue generated by a specific molecule of fluorescent material within a biological tissue. Compared with other optical molecular imaging methods, FMT has the characteristics of high sensitivity, low cost, and safety and reliability. It has become the research frontier and research hotspot of optical molecular imaging technology. This paper took an overview of the recent methodology advances in FMT, mainly focused on the photon propagation model of FMT based on the radiative transfer equation (RTE), and the reconstruction problem solution consist of forward problem and inverse problem. We introduce the detailed technologies utilized in reconstruction of FMT. Finally, the challenges in FMT were discussed. This survey aims at summarizing current research hotspots in methodology of FMT, from which future research may benefit.
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Affiliation(s)
- Yu An
- Key Laboratory of Molecular Imaging, Institute of Automation, Chinese Academy of Sciences, Beijing, China
| | - Kun Wang
- Key Laboratory of Molecular Imaging, Institute of Automation, Chinese Academy of Sciences, Beijing, China
| | - Jie Tian
- Key Laboratory of Molecular Imaging, Institute of Automation, Chinese Academy of Sciences, Beijing, China.
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Chaurasiya B, Zhou M, Tu J, Sun C. Design and validation of a simple device for insufflation of dry powders in a mice model. Eur J Pharm Sci 2018; 123:495-501. [PMID: 30098390 DOI: 10.1016/j.ejps.2018.08.010] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2018] [Revised: 08/04/2018] [Accepted: 08/08/2018] [Indexed: 01/08/2023]
Abstract
Delivery of inhalational dry powders (DPs) to the lung of mice is pivotal for pre-clinical pharmacokinetic and pharmacodynamic investigations. Although several devices have been reported, their application is always limited by many factors, including complicated design, high price, commercially discontinued status, as well as requirement of special skills. Here, we have introduced a simple device for non-invasive and precise delivery of DPs in mice. We set up the self-made device using a 20 G cannula tube and a 1 mL syringe. Subsequently, it was validated in terms for proper installation, delivery of dry powder and safety. Taken together, we believe that this device will be helpful in pre-clinical studies, especially in laboratory experiments, for respiratory drug delivery in small animal models.
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Affiliation(s)
- Birendra Chaurasiya
- Center for Research Development and Evaluation of Pharmaceutical Excipients and Generic Drugs, China Pharmaceutical University, 24 Tong Jia Xiang, Nanjing 210009, China; State Key Laboratory of Natural Medicines, Department of Pharmaceutics, School of Pharmacy, China Pharmaceutical University, 24 Tong Jia Xiang, Nanjing 210009, China
| | - Muye Zhou
- Center for Research Development and Evaluation of Pharmaceutical Excipients and Generic Drugs, China Pharmaceutical University, 24 Tong Jia Xiang, Nanjing 210009, China; State Key Laboratory of Natural Medicines, Department of Pharmaceutics, School of Pharmacy, China Pharmaceutical University, 24 Tong Jia Xiang, Nanjing 210009, China
| | - Jiasheng Tu
- Center for Research Development and Evaluation of Pharmaceutical Excipients and Generic Drugs, China Pharmaceutical University, 24 Tong Jia Xiang, Nanjing 210009, China; State Key Laboratory of Natural Medicines, Department of Pharmaceutics, School of Pharmacy, China Pharmaceutical University, 24 Tong Jia Xiang, Nanjing 210009, China.
| | - Chunmeng Sun
- Center for Research Development and Evaluation of Pharmaceutical Excipients and Generic Drugs, China Pharmaceutical University, 24 Tong Jia Xiang, Nanjing 210009, China; State Key Laboratory of Natural Medicines, Department of Pharmaceutics, School of Pharmacy, China Pharmaceutical University, 24 Tong Jia Xiang, Nanjing 210009, China.
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