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Ruan S, Yin W, Chang J, Yang Y, Sun J, Ma X, Liu Y, Zang J, Liu Y, Li Y, Ren T, Dong H. Correction: Acidic and hypoxic tumor microenvironment regulation by CaO 2-loaded polydopamine nanoparticles. J Nanobiotechnology 2023; 21:180. [PMID: 37280613 DOI: 10.1186/s12951-023-01934-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023] Open
Affiliation(s)
- Shuangrong Ruan
- Key Laboratory of Spine and Spinal Cord Injury Repair and Regeneration, Ministry of Education, School of Medicine, Tongji Hospital, The Institute for Biomedical Engineering & Nano Science, Tongji University, 389 Xincun Road, Shanghai, 200092, China
| | - Weimin Yin
- Key Laboratory of Spine and Spinal Cord Injury Repair and Regeneration, Ministry of Education, School of Medicine, Tongji Hospital, The Institute for Biomedical Engineering & Nano Science, Tongji University, 389 Xincun Road, Shanghai, 200092, China
| | - Jiao Chang
- School of Medicine, Shanghai Skin Disease Hospital, Tongji University, Shanghai, 200092, China
| | - Yan Yang
- Key Laboratory of Spine and Spinal Cord Injury Repair and Regeneration, Ministry of Education, School of Medicine, Tongji Hospital, The Institute for Biomedical Engineering & Nano Science, Tongji University, 389 Xincun Road, Shanghai, 200092, China
| | - Jiuyuan Sun
- School of Medicine, Shanghai Skin Disease Hospital, Tongji University, Shanghai, 200092, China
| | - Xiaoyi Ma
- School of Medicine, Shanghai Skin Disease Hospital, Tongji University, Shanghai, 200092, China
| | - Ying Liu
- Key Laboratory of Spine and Spinal Cord Injury Repair and Regeneration, Ministry of Education, School of Medicine, Tongji Hospital, The Institute for Biomedical Engineering & Nano Science, Tongji University, 389 Xincun Road, Shanghai, 200092, China
| | - Jie Zang
- School of Medicine, Shanghai Skin Disease Hospital, Tongji University, Shanghai, 200092, China
| | - Yiqiong Liu
- School of Medicine, Shanghai Skin Disease Hospital, Tongji University, Shanghai, 200092, China
| | - Yongyong Li
- School of Medicine, Shanghai Skin Disease Hospital, Tongji University, Shanghai, 200092, China.
| | - Tianbin Ren
- School of Medicine, Shanghai Skin Disease Hospital, Tongji University, Shanghai, 200092, China.
| | - Haiqing Dong
- Key Laboratory of Spine and Spinal Cord Injury Repair and Regeneration, Ministry of Education, School of Medicine, Tongji Hospital, The Institute for Biomedical Engineering & Nano Science, Tongji University, 389 Xincun Road, Shanghai, 200092, China.
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Su R, Gu J, Sun J, Zang J, Zhao Y, Zhang T, Chen Y, Chong G, Yin W, Zheng X, Liu B, Huang L, Ruan S, Dong H, Li Y, Li Y. CaCO 3 powder-mediated biomineralization of antigen nanosponges synergize with PD-1 blockade to potentiate anti-tumor immunity. J Nanobiotechnology 2023; 21:120. [PMID: 37024939 PMCID: PMC10080855 DOI: 10.1186/s12951-023-01870-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2022] [Accepted: 03/20/2023] [Indexed: 04/08/2023] Open
Abstract
Antigen self-assembly nanovaccines advance the minimalist design of therapeutic cancer vaccines, but the issue of inefficient cross-presentation has not yet been fully addressed. Herein, we report a unique approach by combining the concepts of "antigen multi-copy display" and "calcium carbonate (CaCO3) biomineralization" to increase cross-presentation. Based on this strategy, we successfully construct sub-100 nm biomineralized antigen nanosponges (BANSs) with high CaCO3 loading (38.13 wt%) and antigen density (61.87%). BANSs can be effectively uptaken by immature antigen-presenting cells (APCs) in the lymph node upon subcutaneous injection. Achieving efficient spatiotemporal coordination of antigen cross-presentation and immune effects, BANSs induce the production of CD4+ T helper cells and cytotoxic T lymphocytes, resulting in effective tumor growth inhibition. BANSs combined with anti-PD-1 antibodies synergistically enhance anti-tumor immunity and reverse the tumor immunosuppressive microenvironment. Overall, this CaCO3 powder-mediated biomineralization of antigen nanosponges offer a robust and safe strategy for cancer immunotherapy.
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Affiliation(s)
- Runping Su
- Shanghai Skin Disease Hospital, The Institute for Biomedical Engineering & Nano Science, School of Medicine, Tongji University, Shanghai, 200092, P. R. China
- Key Laboratory of Medical Molecular Virology (MOE/NHC/CAMS), School of Basic Medical Sciences, Fudan University, Shanghai, 200032, China
| | - Jingjing Gu
- Shanghai Skin Disease Hospital, The Institute for Biomedical Engineering & Nano Science, School of Medicine, Tongji University, Shanghai, 200092, P. R. China
| | - Juanjuan Sun
- Shanghai Skin Disease Hospital, The Institute for Biomedical Engineering & Nano Science, School of Medicine, Tongji University, Shanghai, 200092, P. R. China
| | - Jie Zang
- Shanghai Skin Disease Hospital, The Institute for Biomedical Engineering & Nano Science, School of Medicine, Tongji University, Shanghai, 200092, P. R. China
| | - Yuge Zhao
- Shanghai Skin Disease Hospital, The Institute for Biomedical Engineering & Nano Science, School of Medicine, Tongji University, Shanghai, 200092, P. R. China
| | - Tingting Zhang
- Shanghai Skin Disease Hospital, The Institute for Biomedical Engineering & Nano Science, School of Medicine, Tongji University, Shanghai, 200092, P. R. China
| | - Yingna Chen
- Institute of Acoustics, School of Physics Science and Engineering, Tongji University, Shanghai, 200092, China
| | - Gaowei Chong
- Shanghai Skin Disease Hospital, The Institute for Biomedical Engineering & Nano Science, School of Medicine, Tongji University, Shanghai, 200092, P. R. China
| | - Weimin Yin
- Shanghai Skin Disease Hospital, The Institute for Biomedical Engineering & Nano Science, School of Medicine, Tongji University, Shanghai, 200092, P. R. China
| | - Xiao Zheng
- Shanghai Skin Disease Hospital, The Institute for Biomedical Engineering & Nano Science, School of Medicine, Tongji University, Shanghai, 200092, P. R. China
| | - Bingbing Liu
- Shanghai Skin Disease Hospital, The Institute for Biomedical Engineering & Nano Science, School of Medicine, Tongji University, Shanghai, 200092, P. R. China
| | - Li Huang
- Shanghai Skin Disease Hospital, The Institute for Biomedical Engineering & Nano Science, School of Medicine, Tongji University, Shanghai, 200092, P. R. China
| | - Shuangrong Ruan
- Shanghai Skin Disease Hospital, The Institute for Biomedical Engineering & Nano Science, School of Medicine, Tongji University, Shanghai, 200092, P. R. China
| | - Haiqing Dong
- Shanghai Skin Disease Hospital, The Institute for Biomedical Engineering & Nano Science, School of Medicine, Tongji University, Shanghai, 200092, P. R. China
| | - Yan Li
- Shanghai Skin Disease Hospital, The Institute for Biomedical Engineering & Nano Science, School of Medicine, Tongji University, Shanghai, 200092, P. R. China
| | - Yongyong Li
- Shanghai Skin Disease Hospital, The Institute for Biomedical Engineering & Nano Science, School of Medicine, Tongji University, Shanghai, 200092, P. R. China.
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Ruan S, Yin W, Chang J, Yang Y, Sun J, Ma X, Liu Y, Zang J, Liu Y, Li Y, Ren T, Dong H. Acidic and hypoxic tumor microenvironment regulation by CaO 2-loaded polydopamine nanoparticles. J Nanobiotechnology 2022; 20:544. [PMID: 36577992 PMCID: PMC9798656 DOI: 10.1186/s12951-022-01752-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Accepted: 12/21/2022] [Indexed: 12/29/2022] Open
Abstract
Hypoxia and high accumulation of lactic acid in the tumor microenvironment provide fertile soil for tumor development, maintenance and metastasis. Herein, we developed a calcium peroxide (CaO2)-loaded nanostructure that can play a role of "one stone kill two birds", i.e., acidic and hypoxic tumor microenvironment can be simultaneously regulated by CaO2 loaded nanostructure. Specifically, CaO2-loaded mesoporous polydopamine nanoparticles modified with sodium hyaluronate (denoted as CaO2@mPDA-SH) can gradually accumulate in a tumor site. CaO2 exposed in acidic microenvironment can succeed in consuming the lactic acid with oxygen generation simultaneously, which could remodel the acid and hypoxia tumor microenvironment. More importantly, the relief of hypoxia could further reduce lactate production from the source by down-regulating the hypoxia inducible factor-1α (HIF-1α), which further down-regulated the glycolysis associated enzymes including glycolysis-related glucose transporter 1 (GLUT1) and lactate dehydrogenase A (LDHA). As a result, CaO2@mPDA-SH alone without the employment of other therapeutics can dually regulate the tumor hypoxia and lactic acid metabolism, which efficiently represses tumor progression in promoting immune activation, antitumor metastasis, and anti-angiogenesis.
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Affiliation(s)
- Shuangrong Ruan
- grid.24516.340000000123704535Key Laboratory of Spine and Spinal Cord Injury Repair and Regeneration, Ministry of Education, School of Medicine, Tongji Hospital, The Institute for Biomedical Engineering & Nano Science, Tongji University, 389 Xincun Road, Shanghai, 200092 China
| | - Weimin Yin
- grid.24516.340000000123704535Shanghai Skin Disease Hospital, School of Medicine, Tongji University, Shanghai, 200092 China
| | - Jiao Chang
- grid.24516.340000000123704535Key Laboratory of Spine and Spinal Cord Injury Repair and Regeneration, Ministry of Education, School of Medicine, Tongji Hospital, The Institute for Biomedical Engineering & Nano Science, Tongji University, 389 Xincun Road, Shanghai, 200092 China
| | - Yan Yang
- grid.24516.340000000123704535Shanghai Skin Disease Hospital, School of Medicine, Tongji University, Shanghai, 200092 China
| | - Jiuyuan Sun
- grid.24516.340000000123704535Key Laboratory of Spine and Spinal Cord Injury Repair and Regeneration, Ministry of Education, School of Medicine, Tongji Hospital, The Institute for Biomedical Engineering & Nano Science, Tongji University, 389 Xincun Road, Shanghai, 200092 China
| | - Xiaoyi Ma
- grid.24516.340000000123704535Key Laboratory of Spine and Spinal Cord Injury Repair and Regeneration, Ministry of Education, School of Medicine, Tongji Hospital, The Institute for Biomedical Engineering & Nano Science, Tongji University, 389 Xincun Road, Shanghai, 200092 China
| | - Ying Liu
- grid.24516.340000000123704535Shanghai Skin Disease Hospital, School of Medicine, Tongji University, Shanghai, 200092 China
| | - Jie Zang
- grid.24516.340000000123704535Key Laboratory of Spine and Spinal Cord Injury Repair and Regeneration, Ministry of Education, School of Medicine, Tongji Hospital, The Institute for Biomedical Engineering & Nano Science, Tongji University, 389 Xincun Road, Shanghai, 200092 China
| | - Yiqiong Liu
- grid.24516.340000000123704535Key Laboratory of Spine and Spinal Cord Injury Repair and Regeneration, Ministry of Education, School of Medicine, Tongji Hospital, The Institute for Biomedical Engineering & Nano Science, Tongji University, 389 Xincun Road, Shanghai, 200092 China
| | - Yongyong Li
- grid.24516.340000000123704535Key Laboratory of Spine and Spinal Cord Injury Repair and Regeneration, Ministry of Education, School of Medicine, Tongji Hospital, The Institute for Biomedical Engineering & Nano Science, Tongji University, 389 Xincun Road, Shanghai, 200092 China
| | - Tianbin Ren
- grid.24516.340000000123704535Key Laboratory of Spine and Spinal Cord Injury Repair and Regeneration, Ministry of Education, School of Medicine, Tongji Hospital, The Institute for Biomedical Engineering & Nano Science, Tongji University, 389 Xincun Road, Shanghai, 200092 China
| | - Haiqing Dong
- grid.24516.340000000123704535Shanghai Skin Disease Hospital, School of Medicine, Tongji University, Shanghai, 200092 China
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Zheng X, Liu Y, Liu Y, Zhang T, Zhao Y, Zang J, Yang Y, He R, Chong G, Ruan S, Xu D, Li Y, Dong H. Dual Closed-Loop of Catalyzed Lactate Depletion and Immune Response to Potentiate Photothermal Immunotherapy. ACS Appl Mater Interfaces 2022; 14:23260-23276. [PMID: 35578899 DOI: 10.1021/acsami.2c07254] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Lactate accumulation in the solid tumor is highly relevant to the immunosuppressive tumor microenvironment (TME). Targeting lactate metabolism significantly enhances the efficacy of immunotherapy. However, lactate depletion by lactate oxidase (LOX) consumes oxygen and results in the aggravated hypoxia situation, counteracting the benefit of lactate depletion. Beyond the TME regulation, it is necessary to initiate the effective immunity cycle for therapeutic purposes. In this fashion, dual close-loop of catalyzed lactate depletion and immune response by a rational material design are established to address this issue. Here, we constructed PEG-modified mesoporous polydopamine nanoparticles with Cu2+ chelation and LOX encapsulation (denoted as mCuLP). After mCuLP nanosystems targeting into the tumor sites, released LOX consumes lactate to H2O2. Subsequently, the produced H2O2 is further catalyzed by Cu2+-chelated mPDA to produce oxygen, supplying the oxygen source for the closed-loop of lactate depletion. Meanwhile, the mild PTT caused by the photothermal mPDA induces ICD of tumor cells to promote DC maturation and then T lymphocyte infiltration to kill tumor cells, which forms another closed-loop for cancer immunity. Therefore, this dual closed-loop strategy of mCuLP nanosystems effectively inhibits tumor growth, providing a promising treatment modality to cancer immunotherapy.
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Affiliation(s)
- Xiao Zheng
- Key Laboratory of Spine and Spinal Cord Injury Repair and Regeneration, Ministry of Education, Tongji Hospital, The Institute for Biomedical Engineering & Nano Science, School of Medicine, Tongji University, 200092 Shanghai, P. R. China
| | - Ying Liu
- Key Laboratory of Spine and Spinal Cord Injury Repair and Regeneration, Ministry of Education, Tongji Hospital, The Institute for Biomedical Engineering & Nano Science, School of Medicine, Tongji University, 200092 Shanghai, P. R. China
| | - Yiqiong Liu
- Shanghai Skin Disease Hospital, The Institute for Biomedical Engineering & Nano Science, School of Medicine, Tongji University, 200092 Shanghai, P. R. China
| | - Tingting Zhang
- Shanghai Skin Disease Hospital, The Institute for Biomedical Engineering & Nano Science, School of Medicine, Tongji University, 200092 Shanghai, P. R. China
| | - Yuge Zhao
- Shanghai Skin Disease Hospital, The Institute for Biomedical Engineering & Nano Science, School of Medicine, Tongji University, 200092 Shanghai, P. R. China
| | - Jie Zang
- Shanghai Skin Disease Hospital, The Institute for Biomedical Engineering & Nano Science, School of Medicine, Tongji University, 200092 Shanghai, P. R. China
| | - Yan Yang
- Key Laboratory of Spine and Spinal Cord Injury Repair and Regeneration, Ministry of Education, Tongji Hospital, The Institute for Biomedical Engineering & Nano Science, School of Medicine, Tongji University, 200092 Shanghai, P. R. China
| | - Ruiqing He
- Shanghai Skin Disease Hospital, The Institute for Biomedical Engineering & Nano Science, School of Medicine, Tongji University, 200092 Shanghai, P. R. China
| | - Gaowei Chong
- Key Laboratory of Spine and Spinal Cord Injury Repair and Regeneration, Ministry of Education, Tongji Hospital, The Institute for Biomedical Engineering & Nano Science, School of Medicine, Tongji University, 200092 Shanghai, P. R. China
| | - Shuangrong Ruan
- Shanghai Skin Disease Hospital, The Institute for Biomedical Engineering & Nano Science, School of Medicine, Tongji University, 200092 Shanghai, P. R. China
| | - Dailin Xu
- Shanghai Skin Disease Hospital, The Institute for Biomedical Engineering & Nano Science, School of Medicine, Tongji University, 200092 Shanghai, P. R. China
| | - Yongyong Li
- Shanghai Skin Disease Hospital, The Institute for Biomedical Engineering & Nano Science, School of Medicine, Tongji University, 200092 Shanghai, P. R. China
| | - Haiqing Dong
- Key Laboratory of Spine and Spinal Cord Injury Repair and Regeneration, Ministry of Education, Tongji Hospital, The Institute for Biomedical Engineering & Nano Science, School of Medicine, Tongji University, 200092 Shanghai, P. R. China
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5
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Liu Y, Xu D, Liu Y, Zheng X, Zang J, Ye W, Zhao Y, He R, Ruan S, Zhang T, Dong H, Li Y, Li Y. Remotely boosting hyaluronidase activity to normalize the hypoxic immunosuppressive tumor microenvironment for photothermal immunotherapy. Biomaterials 2022; 284:121516. [DOI: 10.1016/j.biomaterials.2022.121516] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2021] [Revised: 04/03/2022] [Accepted: 04/05/2022] [Indexed: 12/20/2022]
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Liu Y, Liu Y, Xu D, Zang J, Zheng X, Zhao Y, Li Y, He R, Ruan S, Dong H, Gu J, Yang Y, Cheng Q, Li Y. Targeting the Negative Feedback of Adenosine-A2AR Metabolic Pathway by a Tailored Nanoinhibitor for Photothermal Immunotherapy. Adv Sci (Weinh) 2022; 9:e2104182. [PMID: 35306759 PMCID: PMC9108638 DOI: 10.1002/advs.202104182] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2021] [Revised: 02/21/2022] [Indexed: 05/10/2023]
Abstract
The metabolite adenosine plays an important immunosuppressive role in the tumor microenvironment (TME) through its ligation with the metabolic checkpoint adenosine 2A receptor (A2AR). Here, an adenosine-A2AR negative feedback pathway is highlighted during photothermal-induced immunogenic cell death (ICD). Adenosine, hydrolyzed from ATP, is amplified during the photothermal-induced ICD process. It is possible to achieve a robust ICD-based immunotherapy via targeting the adenosine-A2AR metabolic pathway. In this regard, an A2AR inhibitor-loaded polydopamine nanocarrier masked by an acid-sensitive PEG shell is designed to enable tumor-specific delivery and photothermal-induced ICD simultaneously. Upon reaching the acidic TME, the PEG shell selectively detaches and exposes the adhesive polydopamine layer, causing the inhibitors to accumulate at the tumor tissue. The accumulated inhibitors attenuate adenosine's metabolically suppressive effect and strengthen the ICD immune response. It occurs through promoting dendritic cell (DC) activation, increasing CD8+ T lymphocyte infiltration, and reducing the myeloid-derived suppressor cell (MDSC) population. Furthermore, this synergistic therapy significantly regresses the primary tumor, inhibits distal tumor growth, and prevents lung metastasis. The study highlights a strategy to enhance the immunotherapy efficacy of ICD by blocking the metabolic checkpoint A2AR using advanced nanomaterials.
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Affiliation(s)
- Yiqiong Liu
- Shanghai Skin Disease HospitalThe Institute for Biomedical Engineering & Nano ScienceSchool of MedicineTongji UniversityShanghai200092China
| | - Ying Liu
- Shanghai Skin Disease HospitalThe Institute for Biomedical Engineering & Nano ScienceSchool of MedicineTongji UniversityShanghai200092China
| | - Dailin Xu
- Shanghai Skin Disease HospitalThe Institute for Biomedical Engineering & Nano ScienceSchool of MedicineTongji UniversityShanghai200092China
| | - Jie Zang
- Shanghai Skin Disease HospitalThe Institute for Biomedical Engineering & Nano ScienceSchool of MedicineTongji UniversityShanghai200092China
| | - Xiao Zheng
- Shanghai Skin Disease HospitalThe Institute for Biomedical Engineering & Nano ScienceSchool of MedicineTongji UniversityShanghai200092China
| | - Yuge Zhao
- Shanghai Skin Disease HospitalThe Institute for Biomedical Engineering & Nano ScienceSchool of MedicineTongji UniversityShanghai200092China
| | - Yan Li
- Shanghai Skin Disease HospitalThe Institute for Biomedical Engineering & Nano ScienceSchool of MedicineTongji UniversityShanghai200092China
| | - Ruiqing He
- Shanghai Skin Disease HospitalThe Institute for Biomedical Engineering & Nano ScienceSchool of MedicineTongji UniversityShanghai200092China
| | - Shuangrong Ruan
- Shanghai Skin Disease HospitalThe Institute for Biomedical Engineering & Nano ScienceSchool of MedicineTongji UniversityShanghai200092China
| | - Haiqing Dong
- Shanghai Skin Disease HospitalThe Institute for Biomedical Engineering & Nano ScienceSchool of MedicineTongji UniversityShanghai200092China
| | - Jingjing Gu
- Shanghai Skin Disease HospitalThe Institute for Biomedical Engineering & Nano ScienceSchool of MedicineTongji UniversityShanghai200092China
| | - Yan Yang
- Shanghai Skin Disease HospitalThe Institute for Biomedical Engineering & Nano ScienceSchool of MedicineTongji UniversityShanghai200092China
| | - Qian Cheng
- Institute of acousticsSchool of Physics Science and EngineeringTongji UniversityShanghai200092China
| | - Yongyong Li
- Shanghai Skin Disease HospitalThe Institute for Biomedical Engineering & Nano ScienceSchool of MedicineTongji UniversityShanghai200092China
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7
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Ma X, Guo S, Ruan S, Liu Y, Zang J, Yang Y, Dong H, Li Y, Ren T, An M, Li Y. HACE2-Exosome-Based Nano-Bait for Concurrent SARS-CoV-2 Trapping and Antioxidant Therapy. ACS Appl Mater Interfaces 2022; 14:4882-4891. [PMID: 35067058 PMCID: PMC8805705 DOI: 10.1021/acsami.1c19541] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2021] [Accepted: 01/12/2022] [Indexed: 05/22/2023]
Abstract
Corona Virus Disease 2019 (COVID-19) pandemic, caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), is seriously threatening human health. Following SARS-CoV-2 infection, immune cell infiltration creates an inflammatory and oxidative microenvironment, which can cause pneumonia, severe acute respiratory syndrome, kidney failure, and even death. Clinically, a safe and effective treatment strategy remains to be established. Herein, a nano-bait strategy for inhibition of SARS-CoV-2 infection by redirecting viral attack while simultaneously relieving inflammation is developed. Specifically, the nano-bait was based on the exosome-sheathed polydopamine (PDA@Exosome) nanoparticles, which were generated by exocytosis of the PDA nanoparticles from H293T cells. In this approach, PDA@Exosome inherits from the source cells of H293T cells a surface display of ACE2 through pre-engineered expression. The resulting PDA@Exosome can compete with ACE2-expressing epithelial cells for S protein binding, in either the pre-exposure or post-exposure route. Moreover, relying on the ability of PDA to intercept and deactivate radical species, the PDA@Exosome can significantly attenuate the level of inflammatory cytokines by mediating oxidative stress, a major cause of organ injury. Due to its high trapping, multiple antioxidant ability, and good biocompatibility, the HACE2-exosome based nano-bait is a promising robust antiviral nanotherapeutics for the ongoing COVID-19 pandemic.
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Affiliation(s)
- Xiaoyi Ma
- Shanghai
Skin Disease Hospital, The Institute for Biomedical Engineering &
Nano Science, Tongji University School of
Medicine, Shanghai 200092, P. R. China
| | - Shiyu Guo
- Department
of Pharmacology, Tongji University School of Medicine, Shanghai Tenth People’s Hospital, Shanghai 200092, P. R. China
| | - Shuangrong Ruan
- Shanghai
Skin Disease Hospital, The Institute for Biomedical Engineering &
Nano Science, Tongji University School of
Medicine, Shanghai 200092, P. R. China
| | - Yao Liu
- Shanghai
Skin Disease Hospital, The Institute for Biomedical Engineering &
Nano Science, Tongji University School of
Medicine, Shanghai 200092, P. R. China
| | - Jie Zang
- Shanghai
Skin Disease Hospital, The Institute for Biomedical Engineering &
Nano Science, Tongji University School of
Medicine, Shanghai 200092, P. R. China
| | - Yushan Yang
- Shanghai
Skin Disease Hospital, The Institute for Biomedical Engineering &
Nano Science, Tongji University School of
Medicine, Shanghai 200092, P. R. China
| | - Haiqing Dong
- Shanghai
Skin Disease Hospital, The Institute for Biomedical Engineering &
Nano Science, Tongji University School of
Medicine, Shanghai 200092, P. R. China
| | - Yan Li
- Shanghai
Skin Disease Hospital, The Institute for Biomedical Engineering &
Nano Science, Tongji University School of
Medicine, Shanghai 200092, P. R. China
| | - Tianbin Ren
- Shanghai
Skin Disease Hospital, The Institute for Biomedical Engineering &
Nano Science, Tongji University School of
Medicine, Shanghai 200092, P. R. China
| | - Maomao An
- Department
of Pharmacology, Tongji University School of Medicine, Shanghai Tenth People’s Hospital, Shanghai 200092, P. R. China
| | - Yongyong Li
- Shanghai
Skin Disease Hospital, The Institute for Biomedical Engineering &
Nano Science, Tongji University School of
Medicine, Shanghai 200092, P. R. China
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8
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9
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He R, Zang J, Zhao Y, Liu Y, Ruan S, Zheng X, Chong G, Xu D, Yang Y, Yang Y, Zhang T, Gu J, Dong H, Li Y. Nanofactory for metabolic and chemodynamic therapy: pro-tumor lactate trapping and anti-tumor ROS transition. J Nanobiotechnology 2021; 19:426. [PMID: 34922541 PMCID: PMC8684183 DOI: 10.1186/s12951-021-01169-9] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2021] [Accepted: 11/28/2021] [Indexed: 12/22/2022] Open
Abstract
Lactate plays a critical role in tumorigenesis, invasion and metastasis. Exhausting lactate in tumors holds great promise for the reversal of the immunosuppressive tumor microenvironment (TME). Herein, we report on a “lactate treatment plant” (i.e., nanofactory) that can dynamically trap pro-tumor lactate and in situ transformation into anti-tumor cytotoxic reactive oxygen species (ROS) for a synergistic chemodynamic and metabolic therapy. To this end, lactate oxidase (LOX) was nano-packaged by cationic polyethyleneimine (PEI), assisted by a necessary amount of copper ions (PLNPCu). As a reservoir of LOX, the tailored system can actively trap lactate through the cationic PEI component to promote lactate degradation by two-fold efficiency. More importantly, the byproducts of lactate degradation, hydrogen peroxide (H2O2), can be transformed into anti-tumor ROS catalyzing by copper ions, mediating an immunogenic cell death (ICD). With the remission of immunosuppressive TME, ICD process effectively initiated the positive immune response in 4T1 tumor model (88% tumor inhibition). This work provides a novel strategy that rationally integrates metabolic therapy and chemodynamic therapy (CDT) for combating tumors. ![]()
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Affiliation(s)
- Ruiqing He
- Shanghai Skin Disease Hospital, The Institute for Biomedical Engineering & Nano Science, School of Medicine, Tongji University, 200092, Shanghai, China
| | - Jie Zang
- Shanghai Skin Disease Hospital, The Institute for Biomedical Engineering & Nano Science, School of Medicine, Tongji University, 200092, Shanghai, China
| | - Yuge Zhao
- Shanghai Skin Disease Hospital, The Institute for Biomedical Engineering & Nano Science, School of Medicine, Tongji University, 200092, Shanghai, China
| | - Ying Liu
- Shanghai Skin Disease Hospital, The Institute for Biomedical Engineering & Nano Science, School of Medicine, Tongji University, 200092, Shanghai, China
| | - Shuangrong Ruan
- Shanghai Skin Disease Hospital, The Institute for Biomedical Engineering & Nano Science, School of Medicine, Tongji University, 200092, Shanghai, China
| | - Xiao Zheng
- Shanghai Skin Disease Hospital, The Institute for Biomedical Engineering & Nano Science, School of Medicine, Tongji University, 200092, Shanghai, China
| | - Gaowei Chong
- Shanghai Skin Disease Hospital, The Institute for Biomedical Engineering & Nano Science, School of Medicine, Tongji University, 200092, Shanghai, China
| | - Dailin Xu
- Shanghai Skin Disease Hospital, The Institute for Biomedical Engineering & Nano Science, School of Medicine, Tongji University, 200092, Shanghai, China
| | - Yan Yang
- Shanghai Skin Disease Hospital, The Institute for Biomedical Engineering & Nano Science, School of Medicine, Tongji University, 200092, Shanghai, China
| | - Yushan Yang
- Shanghai Skin Disease Hospital, The Institute for Biomedical Engineering & Nano Science, School of Medicine, Tongji University, 200092, Shanghai, China
| | - Tingting Zhang
- Shanghai Skin Disease Hospital, The Institute for Biomedical Engineering & Nano Science, School of Medicine, Tongji University, 200092, Shanghai, China
| | - Jingjing Gu
- Shanghai Skin Disease Hospital, The Institute for Biomedical Engineering & Nano Science, School of Medicine, Tongji University, 200092, Shanghai, China
| | - Haiqing Dong
- Shanghai East hospital, School of Medicine, Tongji University, 200092, Shanghai, China.
| | - Yongyong Li
- Shanghai Skin Disease Hospital, The Institute for Biomedical Engineering & Nano Science, School of Medicine, Tongji University, 200092, Shanghai, China.
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Brochet T, Lapuyade-Lahorgue J, Bougleux S, Salaün M, Ruan S. Deep Learning Using Havrda-Charvat Entropy for Classification of Pulmonary Optical Endomicroscopy. Ing Rech Biomed 2021. [DOI: 10.1016/j.irbm.2021.06.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Xie J, Cao Y, Zhu Z, Ruan S, Wang M, Shi J. Transcriptomic Alterations Induced By Vemurafenib after Treatment of Melanoma: A Comprehensive Bioinformatics Analysis. Indian J Pharm Sci 2021. [DOI: 10.36468/pharmaceutical-sciences.spl.351] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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Ouyang B, Liu F, Ruan S, Liu Y, Guo H, Cai Z, Yu X, Pang Z, Shen S. Localized Free Radicals Burst Triggered by NIR-II Light for Augmented Low-Temperature Photothermal Therapy. ACS Appl Mater Interfaces 2019; 11:38555-38567. [PMID: 31558017 DOI: 10.1021/acsami.9b15009] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
As a novel treatment modality of tumors, hypothermal hyperthermia employed relatively lower temperature (<45 °C) to damage cancer cells with mild toxicity to normal tissues. However, beyond that inducible heat resistance of tumor cells, the discounted therapeutic effect of low temperature hyperthermia was also ascribed to poor penetration of exogenous light stimulation and low accumulation of photothermal agents in tumor sites. Herein, we constructed a multifunctional in situ hydrogel of sodium alginate (ALG) via Ca2+ coordinated with ALG to encapsulate the photothermal agent of Ink and azo initiator of 2,2'-azobis[2-(2-imidazolin-2-yl)propane]dihydrochloride (AIPH) for effective tumor treatment. The designed ALG hydrogel was used to improve the therapeutic effect by increased accumulation of Ink and AIPH and avoid potential side-effects caused by the unexpected spread to the surrounding normal tissues. After injection, local low temperature stimulation was generated with near-infrared-II irradiation by a 1064 nm laser, triggering rapid decomposition of AIPH to produce alkyl radicals. The synergistic low temperature photothermal therapy and cytotoxic-free radicals enhanced the apoptosis of tumor cells via physical heat damage and lipid peroxidation. Thus, remarkable inhibition of tumor growth was observed in a subcutaneous colorectal cancer with negligible side effects. Furthermore, the formulation could also exert strong photoacoustic signals, which were utilized to monitor the stability of the composite hydrogel.
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Affiliation(s)
- Boshu Ouyang
- Central Laboratory, First Affiliated Hospital, Institute (College) of Integrative Medicine , Dalian Medical University , Dalian 116021 , China
- The Institute for Translational Nanomedicine, Shanghai East Hospital , Tongji University School of Medicine , Shanghai 200120 , China
| | - Funan Liu
- Department of Surgical Oncology, Affiliated Hospital 1 , China Medical University , Shenyang 110001 , China
| | - Shuangrong Ruan
- The Institute for Translational Nanomedicine, Shanghai East Hospital , Tongji University School of Medicine , Shanghai 200120 , China
| | - Yao Liu
- The Institute for Translational Nanomedicine, Shanghai East Hospital , Tongji University School of Medicine , Shanghai 200120 , China
| | - Huishu Guo
- Central Laboratory, First Affiliated Hospital, Institute (College) of Integrative Medicine , Dalian Medical University , Dalian 116021 , China
| | - Zhengxu Cai
- Department of Neurology, Affiliated Hospital 1 , Dalian Medical University , Dalian 116011 , China
| | - Xiangrong Yu
- Department of Radiology, Zhuhai Hospital, Zhuhai Peoples Hospital , Jinan University , Zhuhai 519000 , China
| | - Zhiqing Pang
- School of Pharmacy & Key Laboratory of Smart Drug Delivery , Fudan University , Shanghai 201203 , China
| | - Shun Shen
- The Institute for Translational Nanomedicine, Shanghai East Hospital , Tongji University School of Medicine , Shanghai 200120 , China
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Ruan S, Zhao J, He Z, Yang H, Zhang G. Analysis of pathogenicity and immune efficacy of fowl adenovirus serotype 4 isolates. Poult Sci 2018; 97:2647-2653. [DOI: 10.3382/ps/pey113] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2017] [Accepted: 03/09/2018] [Indexed: 11/20/2022] Open
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Samuelson D, Siggins R, Ruan S, Amedee A, Shellito J, Welsh D. Alcohol use and alcohol-associated dysbiosis increase susceptibility to pneumococcal pneumonia in a humanized murine HIV model. Alcohol 2018. [DOI: 10.1016/j.alcohol.2017.11.028] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Trullo R, Petitjean C, Ruan S, Dubray B, Nie D, Shen D. SEGMENTATION OF ORGANS AT RISK IN THORACIC CT IMAGES USING A SHARPMASK ARCHITECTURE AND CONDITIONAL RANDOM FIELDS. Proc IEEE Int Symp Biomed Imaging 2017; 2017:1003-1006. [PMID: 29062466 PMCID: PMC5649634 DOI: 10.1109/isbi.2017.7950685] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Cancer is one of the leading causes of death worldwide. Radiotherapy is a standard treatment for this condition and the first step of the radiotherapy process is to identify the target volumes to be targeted and the healthy organs at risk (OAR) to be protected. Unlike previous methods for automatic segmentation of OAR that typically use local information and individually segment each OAR, in this paper, we propose a deep learning framework for the joint segmentation of OAR in CT images of the thorax, specifically the heart, esophagus, trachea and the aorta. Making use of Fully Convolutional Networks (FCN), we present several extensions that improve the performance, including a new architecture that allows to use low level features with high level information, effectively combining local and global information for improving the localization accuracy. Finally, by using Conditional Random Fields (specifically the CRF as Recurrent Neural Network model), we are able to account for relationships between the organs to further improve the segmentation results. Experiments demonstrate competitive performance on a dataset of 30 CT scans.
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Affiliation(s)
- R Trullo
- Normandie Univ, UNIROUEN, UNIHAVRE, INSA Rouen, LITIS, 76000 Rouen, France
- Department of Radiology and BRIC, UNC-Chapel Hill, USA
| | - C Petitjean
- Normandie Univ, UNIROUEN, UNIHAVRE, INSA Rouen, LITIS, 76000 Rouen, France
| | - S Ruan
- Normandie Univ, UNIROUEN, UNIHAVRE, INSA Rouen, LITIS, 76000 Rouen, France
| | - B Dubray
- Normandie Univ, UNIROUEN, UNIHAVRE, INSA Rouen, LITIS, 76000 Rouen, France
| | - D Nie
- Department of Radiology and BRIC, UNC-Chapel Hill, USA
| | - D Shen
- Department of Radiology and BRIC, UNC-Chapel Hill, USA
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Seloi O, Heintz A, Hanafi R, Laborde R, Dou W, Ruan S, Prades J, Le Gars D, Deramond H, Lefranc M, Coutte A, Toussaint P, Desenclos C, Chauffert B, Boone M, Constans J. Intérêt des séquences avancées en IRM dans l’évaluation à la réponse au Bevacizumab. Suivi multimodal de 20 glioblastomes. J Neuroradiol 2017. [DOI: 10.1016/j.neurad.2017.01.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Constans JM, Heintz A, Seloi O, Deleval N, Beauvois M, Hanafi R, Dallery F, Dou W, Ruan S, Prades J, Le Gars D, Baledent O, Deramond H, Houessinon A, Fichten A, Lefranc M, Coutte A, Toussaint P, Desenclos C, Chauffert B, Boone M. Importance des variations spectrales durant 36 mois de suivi longitudinal IRM et SRM de 80 patients atteints de glioblastomes traités. J Neuroradiol 2017. [DOI: 10.1016/j.neurad.2017.01.048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Lapuyade-Lahorgue J, Ruan S, Li H, Vera P. TU-AB-202-11: Tumor Segmentation by Fusion of Multi-Tracer PET Images Using Copula Based Statistical Methods. Med Phys 2016. [DOI: 10.1118/1.4957433] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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Djemal K, Ruan S, Toumoulin C. Special Issue on Medical Image Analysis for Computer Aided Diagnosis. Ing Rech Biomed 2016. [DOI: 10.1016/j.irbm.2016.01.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Gil H, Qualls WA, Cosner C, DeAngelis DL, Hassan A, Gad AM, Ruan S, Cantrell SR, Beier JC. A model for the coupling of the Greater Bairam and local environmental factors in promoting Rift-Valley Fever epizootics in Egypt. Public Health 2016; 130:64-71. [PMID: 26298586 PMCID: PMC4718900 DOI: 10.1016/j.puhe.2015.07.034] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2014] [Revised: 04/13/2015] [Accepted: 07/09/2015] [Indexed: 11/25/2022]
Abstract
OBJECTIVES Rift-Valley Fever (RVF) is a zoonotic mosquito-borne disease in Africa and the Arabian Peninsula. Drivers for this disease vary by region and are not well understood for North African countries such as Egypt. A deeper understanding of RVF risk factors would inform disease management policies. STUDY DESIGN The present study employs mathematical and computational modeling techniques to ascertain the extent to which the severity of RVF epizootics in Egypt differs depending on the interaction between imported ruminant and environmentally-constrained mosquito populations. METHODS An ordinary differential system of equations, a numerical model, and an individual-based model (IBM) were constructed to represent RVF disease dynamics between localized mosquitoes and ruminants being imported into Egypt for the Greater Bairam. Four cases, corresponding to the Greater Bairam's occurrence during distinct quarters of the solar year, were set up in both models to assess whether the different season-associated mosquito populations present during the Greater Bairam resulted in RVF epizootics of variable magnitudes. RESULTS The numerical model and the IBM produced nearly identical results: ruminant and mosquito population plots for both models were similar in shape and magnitude for all four cases. In both models, all four cases differed in the severity of their corresponding simulated RVF epizootics. The four cases, ranked by the severity of the simulated RVF epizootics in descending order, correspond with the occurrence of the Greater Bairam on the following months: July, October, April, and January. The numerical model was assessed for sensitivity with respect to parameter values and exhibited a high degree of robustness. CONCLUSIONS Limiting the importation of infected ruminants beginning one month prior to the Greater Bairam festival (on years in which the festival falls between the months of July and October: 2014-2022) might be a feasible way of mitigating future RVF epizootics in Egypt.
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Affiliation(s)
- H Gil
- Department of Public Health Sciences, University of Miami Miller School of Medicine, Miami, FL, USA.
| | - W A Qualls
- Department of Public Health Sciences, University of Miami Miller School of Medicine, Miami, FL, USA.
| | - C Cosner
- Department of Mathematics, University of Miami, Miami, FL, USA.
| | - D L DeAngelis
- Department of Biology, University of Miami, Miami, FL, USA.
| | - A Hassan
- Institute of Environmental Studies and Research, Ain Shams University, Egypt.
| | - A M Gad
- Department of Entomology, Ain Shams University, Egypt.
| | - S Ruan
- Department of Mathematics, University of Miami, Miami, FL, USA.
| | - S R Cantrell
- Department of Mathematics, University of Miami, Miami, FL, USA.
| | - J C Beier
- Department of Public Health Sciences, University of Miami Miller School of Medicine, Miami, FL, USA.
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Ruan S, Mi H, Petitjean C, Li H, Chen H, Robinson C, Dubray B, Vera P. Robust Optimal Feature Selection for Lung Tumor Recurrence Prediction in PET Imaging. Int J Radiat Oncol Biol Phys 2015. [DOI: 10.1016/j.ijrobp.2015.07.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Lian C, Li H, Denoeux T, Chen H, Robinson C, Vera P, Ruan S. MO-AB-BRA-10: Cancer Therapy Outcome Prediction Based On Dempster-Shafer Theory and PET Imaging. Med Phys 2015. [DOI: 10.1118/1.4925280] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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Chen H, Dolly S, Victoria J, Anastasio M, Ruan S, Low D, Li H, Wooten H, Dempsey J, Gay H, Mutic S, Thorstad W, Li H. WE-G-BRD-04: BEST IN PHYSICS (JOINT IMAGING-THERAPY): An Integrated Model-Based Intrafractional Organ Motion Tracking Approach with Dynamic MRI in Head and Neck Radiotherapy. Med Phys 2015. [DOI: 10.1118/1.4926060] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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Chen H, Dolly S, Victoria J, Ruan S, Low D, Anastasio M, Fischer-Valuck B, Kashani R, Green O, Rodriguez V, Dempsey J, Mutic S, Gay H, Thorstad W, Li H. SU-C-210-07: Assessment of Intra-/Inter-Fractional Internal Tumor and Organ Movement in Radiotherapy of Head and Neck Cancer Using On-Board Cine MRI. Med Phys 2015. [DOI: 10.1118/1.4923852] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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Guinin M, Ruan S, Nkhali L, Dubray B, Massoptier L, Gardin I. PO-0971: Segmentation of organs at risk using superpixels on MRI or CT images in prostate radiotherapy. Radiother Oncol 2015. [DOI: 10.1016/s0167-8140(15)40963-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Onoma DP, Ruan S, Thureau S, Nkhali L, Modzelewski R, Monnehan GA, Vera P, Gardin I. Segmentation of heterogeneous or small FDG PET positive tissue based on a 3D-locally adaptive random walk algorithm. Comput Med Imaging Graph 2014; 38:753-63. [PMID: 25450759 DOI: 10.1016/j.compmedimag.2014.09.007] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2013] [Revised: 08/19/2014] [Accepted: 09/19/2014] [Indexed: 10/24/2022]
Abstract
A segmentation algorithm based on the random walk (RW) method, called 3D-LARW, has been developed to delineate small tumors or tumors with a heterogeneous distribution of FDG on PET images. Based on the original algorithm of RW [1], we propose an improved approach using new parameters depending on the Euclidean distance between two adjacent voxels instead of a fixed one and integrating probability densities of labels into the system of linear equations used in the RW. These improvements were evaluated and compared with the original RW method, a thresholding with a fixed value (40% of the maximum in the lesion), an adaptive thresholding algorithm on uniform spheres filled with FDG and FLAB method, on simulated heterogeneous spheres and on clinical data (14 patients). On these three different data, 3D-LARW has shown better segmentation results than the original RW algorithm and the three other methods. As expected, these improvements are more pronounced for the segmentation of small or tumors having heterogeneous FDG uptake.
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Affiliation(s)
- D P Onoma
- LITIS EA 4108 - QuantIF, University of Rouen, France; LPNR, UFR-SSMT, University of Cocody, 22 BP 582 Abidjan 22, Côte d'Ivoire.
| | - S Ruan
- LITIS EA 4108 - QuantIF, University of Rouen, France
| | - S Thureau
- LITIS EA 4108 - QuantIF, University of Rouen, France; Department of Nuclear Medicine, Centre Henri-Becquerel & LITIS EA 4108 - QuantIF, France
| | - L Nkhali
- LITIS EA 4108 - QuantIF, University of Rouen, France; Department of Nuclear Medicine, Centre Henri-Becquerel & LITIS EA 4108 - QuantIF, France
| | - R Modzelewski
- LITIS EA 4108 - QuantIF, University of Rouen, France; Department of Nuclear Medicine, Centre Henri-Becquerel & LITIS EA 4108 - QuantIF, France
| | - G A Monnehan
- LPNR, UFR-SSMT, University of Cocody, 22 BP 582 Abidjan 22, Côte d'Ivoire
| | - P Vera
- LITIS EA 4108 - QuantIF, University of Rouen, France; Department of Nuclear Medicine, Centre Henri-Becquerel & LITIS EA 4108 - QuantIF, France
| | - I Gardin
- LITIS EA 4108 - QuantIF, University of Rouen, France; Department of Nuclear Medicine, Centre Henri-Becquerel & LITIS EA 4108 - QuantIF, France.
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Guinin M, Buyssens P, Massoptier L, Ruan S, Nkhali L, Dubray B, Gardin I. Segmentation d’organes à risque du pelvis masculin à l’aide de superpixels. Cancer Radiother 2014. [DOI: 10.1016/j.canrad.2014.07.135] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Buyssens P, Gardin I, Ruan S. Eikonal based region growing for superpixels generation: Application to semi-supervised real time organ segmentation in CT images. Ing Rech Biomed 2014. [DOI: 10.1016/j.irbm.2013.12.007] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Dubray B, Thureau S, Nkhali L, Modzelewski R, Doyeux K, Ruan S, Vera P. FDG-PET imaging for radiotherapy target volume definition in lung cancer. Ing Rech Biomed 2014. [DOI: 10.1016/j.irbm.2013.12.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Mueller GA, Maleki SJ, Johnson K, Hurlburt BK, Cheng H, Ruan S, Nesbit JB, Pomés A, Edwards LL, Schorzman A, Deterding LJ, Park H, Tomer KB, London RE, Williams JG. Identification of Maillard reaction products on peanut allergens that influence binding to the receptor for advanced glycation end products. Allergy 2013; 68:1546-54. [PMID: 24266677 DOI: 10.1111/all.12261] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/07/2013] [Indexed: 11/30/2022]
Abstract
BACKGROUND Recent immunological data demonstrated that dendritic cells preferentially recognize advanced glycation end product (AGE)-modified proteins, upregulate expression of the receptor for AGE (RAGE), and consequently bias the immune response toward allergy. METHODS Peanut extract was characterized by mass spectrometry (MS) to elucidate the specific residues and specific AGE modifications found in raw and roasted peanuts and on rAra h 1 that was artificially glycated by incubation with glucose or xylose. The binding of the RAGE-V1C1 domain to peanut allergens was assessed by PAGE and Western analysis with anti-Ara h 1, 2, and 3 antibodies. IgE binding to rAra h 1 was also assessed using the same methods. RESULTS AGE modifications were found on Ara h 1 and Ara h 3 in both raw and roasted peanut extract. No AGE modifications were found on Ara h 2. Mass spectrometry and Western blot analysis demonstrated that RAGE binds selectively to Ara h 1 and Ara h 3 derived from peanut extract, whereas the analysis failed to demonstrate Ara h 2 binding to RAGE. rAra h 1 with no AGE modifications did not bind RAGE; however, after AGE modification with xylose, rAra h 1 bound to RAGE. CONCLUSIONS AGE modifications to Ara h 1 and Ara h 3 can be found in both raw and roasted peanuts. Receptor for AGE was demonstrated to selectively interact with AGE-modified rAra h 1. If sensitization to peanut allergens occurs in dendritic cells via RAGE interactions, these cells are likely interacting with modified Ara h 1 and Ara h 3, but not Ara h 2.
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Affiliation(s)
- G. A. Mueller
- Laboratory of Structural Biology; National Institute of Environmental Health Sciences; Research Triangle Park NC USA
| | - S. J. Maleki
- US Department of Agriculture; Agricultural Research Service; Southern Regional Research Center; New Orleans LA USA
| | - K. Johnson
- Laboratory of Structural Biology; National Institute of Environmental Health Sciences; Research Triangle Park NC USA
| | - B. K. Hurlburt
- US Department of Agriculture; Agricultural Research Service; Southern Regional Research Center; New Orleans LA USA
| | - H. Cheng
- US Department of Agriculture; Agricultural Research Service; Southern Regional Research Center; New Orleans LA USA
| | - S. Ruan
- US Department of Agriculture; Agricultural Research Service; Southern Regional Research Center; New Orleans LA USA
| | - J. B. Nesbit
- US Department of Agriculture; Agricultural Research Service; Southern Regional Research Center; New Orleans LA USA
| | - A. Pomés
- Indoor Biotechnologies, Inc.; Charlottesville VA USA
| | - L. L. Edwards
- Laboratory of Structural Biology; National Institute of Environmental Health Sciences; Research Triangle Park NC USA
| | - A. Schorzman
- Laboratory of Structural Biology; National Institute of Environmental Health Sciences; Research Triangle Park NC USA
| | - L. J. Deterding
- Laboratory of Structural Biology; National Institute of Environmental Health Sciences; Research Triangle Park NC USA
| | - H. Park
- The Scripps Research Institute; Jupiter FL USA
| | - K. B. Tomer
- Laboratory of Structural Biology; National Institute of Environmental Health Sciences; Research Triangle Park NC USA
| | - R. E. London
- Laboratory of Structural Biology; National Institute of Environmental Health Sciences; Research Triangle Park NC USA
| | - J. G. Williams
- Laboratory of Structural Biology; National Institute of Environmental Health Sciences; Research Triangle Park NC USA
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Baudrier E, Millon G, Nicolier F, Seulin R, Ruan S. Hausdorff distance-based multiresolution maps applied to image similarity measure. The Imaging Science Journal 2013. [DOI: 10.1179/174313107x166884] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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Abou-Alfa G, O'Donoghue J, Gansukh B, Ma J, Ruan S, Koga M, Lee R, Ohishi N, Othomo T, Carrasquillo J. 328 124I GC33 Positron Emission Tomography (PET), Imaging Biomarker of Glypican-3 in Hepatocellular Carcinoma. Eur J Cancer 2012. [DOI: 10.1016/s0959-8049(12)72126-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Wang J, Wang L, Magal P, Wang Y, Zhuo J, Lu X, Ruan S. Corrigendum to “Modelling the transmission dynamics of meticillin-resistant Staphylococcus aureus in Beijing Tongren hospital” [Journal of Hospital Infection 2011;79:302–308]. J Hosp Infect 2012. [DOI: 10.1016/j.jhin.2012.04.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Mattison C, Grimm C, Desormeaux W, Ruan S, Maleki S. Identification of Maillard reaction induced chemical modifications on Ara h 1. J Allergy Clin Immunol 2012. [DOI: 10.1016/j.jaci.2011.12.225] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Maleki SJ, Teuber SS, Cheng H, Chen D, Comstock SS, Ruan S, Schein CH. Computationally predicted IgE epitopes of walnut allergens contribute to cross-reactivity with peanuts. Allergy 2011; 66:1522-9. [PMID: 21883278 DOI: 10.1111/j.1398-9995.2011.02692.x] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
BACKGROUND Cross-reactivity between peanuts and tree nuts implies that similar immunoglobulin E (IgE) epitopes are present in their proteins. OBJECTIVE To determine whether walnut sequences similar to known peanut IgE-binding sequences, according to the property distance (PD) scale implemented in the Structural Database of Allergenic Proteins, react with IgE from sera of patients with allergy to walnut and/or peanut. METHODS Patient sera were characterized by western blotting for IgE binding to nut protein extracts and to peptides from walnut and peanut allergens, similar to known peanut epitopes as defined by low PD values, synthesized on membranes. Competitive enzyme-linked immunosorbent assay (ELISA) was used to show that peanut and predicted walnut epitope sequences compete with purified Ara h 2 for binding to IgE in serum from a cross-reactive patient. RESULTS Sequences from the vicilin walnut allergen Jug r 2, which had low PD values to epitopes of the peanut allergen Ara h 2, a 2S albumin, bound to IgE in sera from five patients who reacted to either walnut or peanut or both. A walnut epitope recognized by sera from six patients mapped to a surface-exposed region on a model of the N-terminal pro-region of Jug r 2. This predicted walnut epitope competed for IgE binding to Ara h 2 in serum as well as the known IgE epitope from Ara h 2. CONCLUSIONS Sequences with low PD value (< 8.5) to known IgE epitopes could contribute to cross-reactivity between allergens. This further validates the PD scoring method for predicting cross-reactive epitopes in allergens.
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Affiliation(s)
- S J Maleki
- U.S. Department of Agriculture-Agricultural Research Service-Southern Regional Research Center (USDA-ARS-SRRC), New Orleans, LA 70124, USA.
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Wang J, Wang L, Magal P, Wang Y, Zhuo J, Lu X, Ruan S. Modelling the transmission dynamics of meticillin-resistant Staphylococcus aureus in Beijing Tongren hospital. J Hosp Infect 2011; 79:302-8. [PMID: 22033439 DOI: 10.1016/j.jhin.2011.08.019] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2010] [Accepted: 08/16/2011] [Indexed: 11/18/2022]
Abstract
Semi-professional volunteers work in many tertiary care hospitals in China as healthcare assistants. Proper infection control measures are needed to reduce nosocomial transmission involving volunteers. A compartmental model was constructed to describe the transmission characteristics of meticillin-resistant Staphylococcus aureus (MRSA) in the emergency ward (EW) and respiratory intensive care unit (RICU) for volunteers in Beijing Tongren Hospital, Beijing, China. The model consists of components describing uncolonized and colonized patients, uncontaminated and contaminated healthcare workers (HCWs), and uncontaminated and contaminated volunteers. The basic reproduction number (R(0)) was calculated, and the dependence of R(0) on various model parameters was analysed. Moreover, simulations of the model were performed for comparision with the reported data on the numbers of colonized patients in the EW and RICU from 3 March 2009 to 28 February 2010, respectively. Sensitivity analysis of R(0) showed that increasing handwashing compliance among HCWs and volunteers would reduce the risk of transmission dramatically. As volunteers care for patients on a one-to-one basis, this study showed that the number of MRSA-positive patients would increase if volunteers were replaced by HCWs. Therefore, in addition to improving hand hygiene among HCWs, the employment of properly trained volunteers is an attractive alternative to decrease MRSA and other multi-drug resistant bacteria infections in the hospital setting.
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Affiliation(s)
- J Wang
- Clinical Laboratory, Beijing Tongren Hospital, Capital Medical University, Beijing, China
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Graber T, Anderson S, Brewer H, Chen YS, Cho HS, Dashdorj N, Henning RW, Kosheleva I, Macha G, Meron M, Pahl R, Ren Z, Ruan S, Schotte F, Srajer V, Viccaro PJ, Westferro F, Anfinrud P, Moffat K. BioCARS: a synchrotron resource for time-resolved X-ray science. J Synchrotron Radiat 2011; 18:658-70. [PMID: 21685684 PMCID: PMC3121234 DOI: 10.1107/s0909049511009423] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2010] [Accepted: 03/11/2011] [Indexed: 05/02/2023]
Abstract
BioCARS, a NIH-supported national user facility for macromolecular time-resolved X-ray crystallography at the Advanced Photon Source (APS), has recently completed commissioning of an upgraded undulator-based beamline optimized for single-shot laser-pump X-ray-probe measurements with time resolution as short as 100 ps. The source consists of two in-line undulators with periods of 23 and 27 mm that together provide high-flux pink-beam capability at 12 keV as well as first-harmonic coverage from 6.8 to 19 keV. A high-heat-load chopper reduces the average power load on downstream components, thereby preserving the surface figure of a Kirkpatrick-Baez mirror system capable of focusing the X-ray beam to a spot size of 90 µm horizontal by 20 µm vertical. A high-speed chopper isolates single X-ray pulses at 1 kHz in both hybrid and 24-bunch modes of the APS storage ring. In hybrid mode each isolated X-ray pulse delivers up to ~4 × 10(10) photons to the sample, thereby achieving a time-averaged flux approaching that of fourth-generation X-FEL sources. A new high-power picosecond laser system delivers pulses tunable over the wavelength range 450-2000 nm. These pulses are synchronized to the storage-ring RF clock with long-term stability better than 10 ps RMS. Monochromatic experimental capability with Biosafety Level 3 certification has been retained.
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Affiliation(s)
- T Graber
- Center for Advanced Radiation Sources, The University of Chicago, Chicago, IL 60637, USA.
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Constans JM, Collet S, Kauffmann F, Hossu G, Dou W, Ruan S, Rioult F, Derlon JM, Lechapt-Zalcmann E, Chapon F, Valable S, Théron J, Guillamo JS, Courthéoux P. Five-Year Longitudinal MRI Follow-up and (1)H Single Voxel MRS in 14 patients with Gliomatosis Treated with Temodal, Radiotherapy and Antiangiogenic Therapy. Neuroradiol J 2011; 24:401-14. [PMID: 24059663 DOI: 10.1177/197140091102400309] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2010] [Accepted: 01/03/2011] [Indexed: 11/15/2022] Open
Abstract
Gliomatosis cerebri (GC) is a challenging tumor, considered to have a poor prognosis and poor response to treatments. The purpose of this study is to better understand glial tumor metabolism and post chemotherapy, radiotherapy and antiangiogenic variations in a longitudinal study to determine cerebral variation in MRS area, amplitude, and ratios of metabolites and spectral profiles during a five year longitudinal follow-up in 14 patients with gliomatosis without initial hyperperfusion and treated with chemotherapy (Temozolomide (Temodal(®))), radiotherapy and subsequent antiangiogenic therapy. The study also aimed to detect changes in infiltration, proliferation, lipids or glycolytic metabolism, as these changes could be monitored longitudinally in humans with glial brain tumors (low and high grade) after therapy, using conventional magnetic resonance imaging (MRI), spectroscopy (MRS) and MR perfusion. Most patients had first initial clinical and MRS improvement and stable MRI. After 12 to 24 chemotherapy treatment cycles MRS usually showed an increase in the Cho/Cr ratio (proliferation) and sometimes contrast enhancements. Later, the patients showed clinical deterioration and radiotherapy was started. There was an improvement with radiotherapy that lasted nine to 18 months. This was followed by a worsening that led to try antiangiogenic therapy. Later in the evolution for three patients with hyperperfusion this symptom disappeared, but proliferation, infiltration and glycolytic metabolism remained at a high level. Spectroscopic and metabolic changes often occur well before clinical deterioration and sometimes before improvement. Therefore, MRS could be more sensitive and could detect changes earlier than MRI and is sometimes predictive. Despite the difficulty, the variability and unknown factors, these repeated measurements give us a better insight into the nature of the different processes, tumor progression and could lead to better understanding of therapeutic response.
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Affiliation(s)
- J M Constans
- CHU Caen; Caen, France - Cervoxy, UMR 6232 CI-NAPS, CNRS, CEA Basse Normandie Caen University, Centre CYCERON; Caen, France -
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Schwartz J, Jaggi JS, O'Donoghue JA, Ruan S, McDevitt M, Larson SM, Scheinberg DA, Humm JL. Renal uptake of bismuth-213 and its contribution to kidney radiation dose following administration of actinium-225-labeled antibody. Phys Med Biol 2011; 56:721-33. [PMID: 21220845 DOI: 10.1088/0031-9155/56/3/012] [Citation(s) in RCA: 67] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Clinical therapeutic studies using (225)Ac-labeled antibodies have begun. Of major concern is renal toxicity that may result from the three alpha-emitting progeny generated following the decay of (225)Ac. The purpose of this study was to determine the amount of (225)Ac and non-equilibrium progeny in the mouse kidney after the injection of (225)Ac-huM195 antibody and examine the dosimetric consequences. Groups of mice were sacrificed at 24, 96 and 144 h after injection with (225)Ac-huM195 antibody and kidneys excised. One kidney was used for gamma ray spectroscopic measurements by a high-purity germanium (HPGe) detector. The second kidney was used to generate frozen tissue sections which were examined by digital autoradiography (DAR). Two measurements were performed on each kidney specimen: (1) immediately post-resection and (2) after sufficient time for any non-equilibrium excess (213)Bi to decay completely. Comparison of these measurements enabled estimation of the amount of excess (213)Bi reaching the kidney (γ-ray spectroscopy) and its sub-regional distribution (DAR). The average absorbed dose to whole kidney, determined by spectroscopy, was 0.77 (SD 0.21) Gy kBq(-1), of which 0.46 (SD 0.16) Gy kBq(-1) (i.e. 60%) was due to non-equilibrium excess (213)Bi. The relative contributions to renal cortex and medulla were determined by DAR. The estimated dose to the cortex from non-equilibrium excess (213)Bi (0.31 (SD 0.11) Gy kBq(-1)) represented ∼46% of the total. For the medulla the dose contribution from excess (213)Bi (0.81 (SD 0.28) Gy kBq(-1)) was ∼80% of the total. Based on these estimates, for human patients we project a kidney-absorbed dose of 0.28 Gy MBq(-1) following administration of (225)Ac-huM195 with non-equilibrium excess (213)Bi responsible for approximately 60% of the total. Methods to reduce renal accumulation of radioactive progeny appear to be necessary for the success of (225)Ac radioimmunotherapy.
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Affiliation(s)
- J Schwartz
- Department of Medical Physics, Memorial Sloan-Kettering Cancer Center, New York, NY 10065, USA.
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Wang X, Guo J, Ruan S, Lu Y, Bi Y, Xiao X, Wang G. MP-12.15: Ureteroscopic Lithotripsy for the Treatment of Urinary Calculi in Infants and Young Children. Urology 2009. [DOI: 10.1016/j.urology.2009.07.902] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Ruan S, Noyes K, Bazarian J. 11: S100β Screening: A Cost-Minimization Study for Managing Adult Patients With Mild Traumatic Brain Injury in the Emergency Department. Ann Emerg Med 2008. [DOI: 10.1016/j.annemergmed.2008.01.279] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Li X, Lebonvallet S, Qiu T, Ruan S. An Improved Level Set Method for Automatically Volume Measure: Application in Tumor Tracking from MRI Images. ACTA ACUST UNITED AC 2007; 2007:808-11. [DOI: 10.1109/iembs.2007.4352413] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Zhang M, Chen Q, Li X, O'Donoghue J, Ruan S, Zanzonico P, Ling C, Humm J. SU-FF-I-109: Image Deconvolution in Autoradiography: A Preliminary Study. Med Phys 2007. [DOI: 10.1118/1.2760486] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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Feng X, Du Y, Chen X, Shen R, Ruan S, Wu Q, Tan J. Control of hypertrophic scar from inception by using xenogenic (porcine) acellular dermal matrix (ADM) to cover deep second degree burn. Burns 2007. [DOI: 10.1016/j.burns.2006.10.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Pugachev A, Claus F, Sun X, Ruan S, Cai S, Koziorowsky J, Finn R, O”Donoghue J, Ling C, Humm J. MO-D-I-609-08: Validation of PET Hypoxia Tracers by Autoradiography and Fluorescent Microscopy. Med Phys 2005. [DOI: 10.1118/1.1998244] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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Humm JL, Ballon D, Hu YC, Ruan S, Chui C, Tulipano PK, Erdi A, Koutcher J, Zakian K, Urano M, Zanzonico P, Mattis C, Dyke J, Chen Y, Harrington P, O'Donoghue JA, Ling CC. A stereotactic method for the three‐dimensional registration of multi‐modality biologic images in animals: NMR, PET, histology, and autoradiography. Med Phys 2003; 30:2303-14. [PMID: 14528951 DOI: 10.1118/1.1600738] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
The objective of this work was to develop and then validate a stereotactic fiduciary marker system for tumor xenografts in rodents which could be used to co-register magnetic resonance imaging (MRI), PET, tissue histology, autoradiography, and measurements from physiologic probes. A Teflon fiduciary template has been designed which allows the precise insertion of small hollow Teflon rods (0.71 mm diameter) into a tumor. These rods can be visualized by MRI and PET as well as by histology and autoradiography on tissue sections. The methodology has been applied and tested on a rigid phantom, on tissue phantom material, and finally on tumor bearing mice. Image registration has been performed between the MRI and PET images for the rigid Teflon phantom and among MRI, digitized microscopy images of tissue histology, and autoradiograms for both tissue phantom and tumor-bearing mice. A registration accuracy, expressed as the average Euclidean distance between the centers of three fiduciary markers among the registered image sets, of 0.2 +/- 0.06 mm was achieved between MRI and microPET image sets of a rigid Teflon phantom. The fiduciary template allows digitized tissue sections to be co-registered with three-dimensional MRI images with an average accuracy of 0.21 and 0.25 mm for the tissue phantoms and tumor xenografts, respectively. Between histology and autoradiograms, it was 0.19 and 0.21 mm for tissue phantoms and tumor xenografts, respectively. The fiduciary marker system provides a coordinate system with which to correlate information from multiple image types, on a voxel-by-voxel basis, with sub-millimeter accuracy--even among imaging modalities with widely disparate spatial resolution and in the absence of identifiable anatomic landmarks.
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Affiliation(s)
- J L Humm
- Department of Medical Physics and Radiology, Memorial Sloan-Kettering Cancer Center, 1275 York Avenue, New York, New York 10021, USA.
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Schmidt M, Pahl R, Srajer V, Anderson S, Brister K, Ruan S, Rajagopal S, Ren Z, Moffat K. Application of singular value decomposition to time-resolved X-ray data; simulations and experiments. Acta Crystallogr A 2002. [DOI: 10.1107/s0108767302099956] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Abstract
Recently, ratio-dependent predator-prey systems have been regarded by some researchers to be more appropriate for predator-prey interactions where predation involves serious searching processes. However, such models have set up a challenging issue regarding their dynamics near the origin since these models are not well-defined there. In this paper, the qualitative behavior of a class of ratio-dependent predator-prey system at the origin in the interior of the first quadrant is studied. It is shown that the origin is indeed a critical point of higher order. There can exist numerous kinds of topological structures in a neighborhood of the origin including the parabolic orbits, the elliptic orbits, the hyperbolic orbits, and any combination of them. These structures have important implications for the global behavior of the model. Global qualitative analysis of the model depending on all parameters is carried out, and conditions of existence and non-existence of limit cycles for the model are given. Computer simulations are presented to illustrate the conclusions.
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Affiliation(s)
- D Xiao
- Department of Mathematics, Central China Normal University, Wuhan, Hubei.
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