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Wen H, Poutiainen P, Batnasan E, Latonen L, Lehto VP, Xu W. Biomimetic Inorganic Nanovectors as Tumor-Targeting Theranostic Platform against Triple-Negative Breast Cancer. Pharmaceutics 2023; 15:2507. [PMID: 37896267 PMCID: PMC10610067 DOI: 10.3390/pharmaceutics15102507] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2023] [Revised: 10/18/2023] [Accepted: 10/20/2023] [Indexed: 10/29/2023] Open
Abstract
Mesoporous silicon nanoparticles (PSi NPs) are promising platforms of nanomedicine because of their good compatibility, high payload capacities of anticancer drugs, and easy chemical modification. Here, PSi surfaces were functionalized with bisphosphonates (BP) for radiolabeling, loaded with doxorubicin (DOX) for chemotherapy, and the NPs were coated with cancer cell membrane (CCm) for homotypic cancer targeting. To enhance the CCm coating, the NP surfaces were covered with polyethylene glycol prior to the CCm coating. The effects of the BP amount and pH conditions on the radiolabeling efficacy were studied. The maximum BP was (2.27 wt%) on the PSi surfaces, and higher radiochemical yields were obtained for 99mTc (97% ± 2%) and 68Ga (94.6% ± 0.2%) under optimized pH conditions (pH = 5). The biomimetic NPs exhibited a good radiochemical and colloidal stability in phosphate-buffered saline and cell medium. In vitro studies demonstrated that the biomimetic NPs exhibited an enhanced cellular uptake and increased delivery of DOX to cancer cells, resulting in better chemotherapy than free DOX or pure NPs. Altogether, these findings indicate the potential of the developed platform for cancer treatment and diagnosis.
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Affiliation(s)
- Huang Wen
- Department of Technical Physics, University of Eastern Finland, Yliopistonranta 1F, 70211 Kuopio, Finland;
| | - Pekka Poutiainen
- Kuopio University Hospital, University of Eastern Finland, Puijonlaaksontie 2, 70210 Kuopio, Finland;
| | - Enkhzaya Batnasan
- School of Medicine, University of Eastern Finland, Yliopistonranta 1F, 70211 Kuopio, Finland; (E.B.); (L.L.)
| | - Leena Latonen
- School of Medicine, University of Eastern Finland, Yliopistonranta 1F, 70211 Kuopio, Finland; (E.B.); (L.L.)
| | - Vesa-Pekka Lehto
- Department of Technical Physics, University of Eastern Finland, Yliopistonranta 1F, 70211 Kuopio, Finland;
| | - Wujun Xu
- Department of Technical Physics, University of Eastern Finland, Yliopistonranta 1F, 70211 Kuopio, Finland;
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Li X, Yue R, Guan G, Zhang C, Zhou Y, Song G. Recent development of pH-responsive theranostic nanoplatforms for magnetic resonance imaging-guided cancer therapy. EXPLORATION (BEIJING, CHINA) 2023; 3:20220002. [PMID: 37933379 PMCID: PMC10624388 DOI: 10.1002/exp.20220002] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/24/2022] [Accepted: 09/16/2022] [Indexed: 11/08/2023]
Abstract
The acidic characteristic of the tumor site is one of the most well-known features and provides a series of opportunities for cancer-specific theranostic strategies. In this regard, pH-responsive theranostic nanoplatforms that integrate diagnostic and therapeutic capabilities are highly developed. The fluidity of the tumor microenvironment (TME), with its temporal and spatial heterogeneities, makes noninvasive molecular magnetic resonance imaging (MRI) technology very desirable for imaging TME constituents and developing MRI-guided theranostic nanoplatforms for tumor-specific treatments. Therefore, various MRI-based theranostic strategies which employ assorted therapeutic modes have been drawn up for more efficient cancer therapy through the raised local concentration of therapeutic agents in pathological tissues. In this review, we summarize the pH-responsive mechanisms of organic components (including polymers, biological molecules, and organosilicas) as well as inorganic components (including metal coordination compounds, metal oxides, and metal salts) of theranostic nanoplatforms. Furthermore, we review the designs and applications of pH-responsive theranostic nanoplatforms for the diagnosis and treatment of cancer. In addition, the challenges and prospects in developing theranostic nanoplatforms with pH-responsiveness for cancer diagnosis and therapy are discussed.
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Affiliation(s)
- Xu Li
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical EngineeringHunan UniversityChangshaP. R. China
| | - Renye Yue
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical EngineeringHunan UniversityChangshaP. R. China
| | - Guoqiang Guan
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical EngineeringHunan UniversityChangshaP. R. China
| | - Cheng Zhang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical EngineeringHunan UniversityChangshaP. R. China
| | - Ying Zhou
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical EngineeringHunan UniversityChangshaP. R. China
| | - Guosheng Song
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical EngineeringHunan UniversityChangshaP. R. China
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Radhakrishnan D, Mohanan S, Choi G, Choy JH, Tiburcius S, Trinh HT, Bolan S, Verrills N, Tanwar P, Karakoti A, Vinu A. The emergence of nanoporous materials in lung cancer therapy. SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS 2022; 23:225-274. [PMID: 35875329 PMCID: PMC9307116 DOI: 10.1080/14686996.2022.2052181] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/01/2021] [Revised: 01/31/2022] [Accepted: 03/08/2022] [Indexed: 06/15/2023]
Abstract
Lung cancer is one of the most common cancers, affecting more than 2.1 million people across the globe every year. A very high occurrence and mortality rate of lung cancer have prompted active research in this area with both conventional and novel forms of therapies including the use of nanomaterials based drug delivery agents. Specifically, the unique physico-chemical and biological properties of porous nanomaterials have gained significant momentum as drug delivery agents for delivering a combination of drugs or merging diagnosis with targeted therapy for cancer treatment. This review focuses on the emergence of nano-porous materials for drug delivery in lung cancer. The review analyses the currently used nanoporous materials, including inorganic, organic and hybrid porous materials for delivering drugs for various types of therapies, including chemo, radio and phototherapy. It also analyses the selected research on stimuli-responsive nanoporous materials for drug delivery in lung cancer before summarizing the various findings and projecting the future of emerging trends. This review provides a strong foundation for the current status of the research on nanoporous materials, their limitations and the potential for improving their design to overcome the unique challenges of delivering drugs for the treatment of lung cancer.
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Affiliation(s)
- Deepika Radhakrishnan
- Global Innovative Centre for Advanced Nanomaterials, College of Engineering, Science and Environment, School of Engineering, The University of Newcastle, Callaghan, NSW, 2308, Australia
| | - Shan Mohanan
- Global Innovative Centre for Advanced Nanomaterials, College of Engineering, Science and Environment, School of Engineering, The University of Newcastle, Callaghan, NSW, 2308, Australia
| | - Goeun Choi
- Global Innovative Centre for Advanced Nanomaterials, College of Engineering, Science and Environment, School of Engineering, The University of Newcastle, Callaghan, NSW, 2308, Australia
- Intelligent Nanohybrid Materials Laboratory (INML), Institute of Tissue Regeneration Engineering (ITREN), Dankook University, Cheonan31116, Republic of Korea
- College of Science and Technology, Dankook University, Cheonan31116, Republic of Korea
- Department of Nanobiomedical Science and BK21 PLUS NBM Global Research Center for Regenerative Medicine, Dankook University, Cheonan31116, Korea
| | - Jin-Ho Choy
- Global Innovative Centre for Advanced Nanomaterials, College of Engineering, Science and Environment, School of Engineering, The University of Newcastle, Callaghan, NSW, 2308, Australia
- Intelligent Nanohybrid Materials Laboratory (INML), Institute of Tissue Regeneration Engineering (ITREN), Dankook University, Cheonan31116, Republic of Korea
- Course, College of Medicine, Dankook UniversityDepartment of Pre-medical, Cheonan31116, Korea
- Tokyo Tech World Research Hub Initiative (WRHI), Institute of Innovative Research, Tokyo Institute of Technology, Yokohama226-8503, Japan
| | - Steffi Tiburcius
- Global Innovative Centre for Advanced Nanomaterials, College of Engineering, Science and Environment, School of Engineering, The University of Newcastle, Callaghan, NSW, 2308, Australia
| | - Hoang Trung Trinh
- Global Innovative Centre for Advanced Nanomaterials, College of Engineering, Science and Environment, School of Engineering, The University of Newcastle, Callaghan, NSW, 2308, Australia
| | - Shankar Bolan
- Global Innovative Centre for Advanced Nanomaterials, College of Engineering, Science and Environment, School of Engineering, The University of Newcastle, Callaghan, NSW, 2308, Australia
| | - Nikki Verrills
- Global Innovative Centre for Advanced Nanomaterials, College of Engineering, Science and Environment, School of Engineering, The University of Newcastle, Callaghan, NSW, 2308, Australia
- School of Biomedical Sciences and Pharmacy, College of Health, Medicine and Wellness, The University of Newcastle, Callaghan, NSW, 2308, Australia
| | - Pradeep Tanwar
- Global Innovative Centre for Advanced Nanomaterials, College of Engineering, Science and Environment, School of Engineering, The University of Newcastle, Callaghan, NSW, 2308, Australia
- School of Biomedical Sciences and Pharmacy, College of Health, Medicine and Wellness, The University of Newcastle, Callaghan, NSW, 2308, Australia
| | - Ajay Karakoti
- Global Innovative Centre for Advanced Nanomaterials, College of Engineering, Science and Environment, School of Engineering, The University of Newcastle, Callaghan, NSW, 2308, Australia
| | - Ajayan Vinu
- Global Innovative Centre for Advanced Nanomaterials, College of Engineering, Science and Environment, School of Engineering, The University of Newcastle, Callaghan, NSW, 2308, Australia
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Qian J, Wen H, Tamarov K, Xu W, Lehto VP. Recent developments of porous silicon nanovectors with various imaging modalities in the framework of theranostics. ChemMedChem 2022; 17:e202200004. [PMID: 35212460 PMCID: PMC9314675 DOI: 10.1002/cmdc.202200004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2022] [Revised: 02/24/2022] [Indexed: 11/17/2022]
Abstract
The number of in vitro, ex vivo, and in vivo studies on porous silicon (PSi) nanoparticles for biomedical applications has increased extensively over the last decade. The focus of the reports has been on the carrier properties of PSi concerning the therapeutic aspect due to several beneficial nanovector characteristics including high payload capacity, biocompatibility, and versatile surface chemistry. Recently, increasing attention has been paid to the diagnostic aspects of PSi, which is typically attributed to the biotraceability of the nanovector. Also, PSi has been studied as a contrast agent. When both these aspects, therapy and diagnosis, are integrated into one nanovector, we can discuss a real nanotheranostics approach. Herein, we review the recent progress developing PSi for various imaging modalities, specifically focusing on optical imaging, magnetic resonance imaging, and nuclear medicine imaging. Furthermore, we summarized the knowledge gaps that must be covered before applying PSi in clinical imaging, highlighting future research trends.
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Affiliation(s)
- Jing Qian
- University of Eastern Finland - Kuopio Campus: Ita-Suomen yliopisto - Kuopion kampus, Applied Physics, Yliopistonranta 1, 70211, KUOPIO, FINLAND
| | - Huang Wen
- University of Eastern Finland - Kuopio Campus: Ita-Suomen yliopisto - Kuopion kampus, Applied Physics, Yliopistonranta 1, Melania 112-3, KUOPIO, 70211, KUOPIO, FINLAND
| | - Konstantin Tamarov
- University of Eastern Finland - Kuopio Campus: Ita-Suomen yliopisto - Kuopion kampus, Applied Physics, FINLAND
| | - Wujun Xu
- University of Eastern Finland - Kuopio Campus: Ita-Suomen yliopisto - Kuopion kampus, Applied Physics, FINLAND
| | - Vesa-Pekka Lehto
- University of Eastern Finland, Department of Applied Physics, POB 1627, 70211, Kuopio, FINLAND
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de Menezes BRC, Rodrigues KF, Schatkoski VM, Pereira RM, Ribas RG, Montanheiro TLDA, Thim GP. Current advances in drug delivery of nanoparticles for respiratory disease treatment. J Mater Chem B 2021; 9:1745-1761. [PMID: 33508058 DOI: 10.1039/d0tb01783c] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Cases of respiratory diseases have been increasing around the world, affecting the health and quality of life of millions of people every year. Chronic respiratory diseases (CRDs) and acute respiratory infections (ARIs) are responsible for many hospital admissions and deaths, requiring sophisticated treatments that facilitate the delivery of therapeutics to specific target sites with controlled release. In this context, different nanoparticles (NPs) have been explored to match this demand, such as lipid, liposome, protein, carbon-based, polymeric, metallic, oxide, and magnetic NPs. The use of NPs as drug delivery systems can improve the efficacy of commercial drugs due to their advantages related to sustained drug release, targeting effects, and patient compliance. The current review presents an updated summary of recent advances regarding the use of NPs as drug delivery systems to treat diseases related to the respiratory tract, such as CRDs and ARIs. The latest applications presented in the literature were considered, and the opportunities and challenges of NPs in the drug delivery field are discussed.
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Affiliation(s)
- Beatriz Rossi Canuto de Menezes
- Laboratory of Plasma and Processes (LPP), Technological Institute of Aeronautics (ITA), Praça Marechal Eduardo Gomes, 50, Vila das Acácias, São José dos Campos, SP 12228-900, Brazil.
| | - Karla Faquine Rodrigues
- Laboratory of Plasma and Processes (LPP), Technological Institute of Aeronautics (ITA), Praça Marechal Eduardo Gomes, 50, Vila das Acácias, São José dos Campos, SP 12228-900, Brazil.
| | - Vanessa Modelski Schatkoski
- Laboratory of Plasma and Processes (LPP), Technological Institute of Aeronautics (ITA), Praça Marechal Eduardo Gomes, 50, Vila das Acácias, São José dos Campos, SP 12228-900, Brazil.
| | - Raíssa Monteiro Pereira
- Laboratory of Plasma and Processes (LPP), Technological Institute of Aeronautics (ITA), Praça Marechal Eduardo Gomes, 50, Vila das Acácias, São José dos Campos, SP 12228-900, Brazil.
| | - Renata Guimarães Ribas
- Laboratory of Plasma and Processes (LPP), Technological Institute of Aeronautics (ITA), Praça Marechal Eduardo Gomes, 50, Vila das Acácias, São José dos Campos, SP 12228-900, Brazil.
| | - Thaís Larissa do Amaral Montanheiro
- Laboratory of Plasma and Processes (LPP), Technological Institute of Aeronautics (ITA), Praça Marechal Eduardo Gomes, 50, Vila das Acácias, São José dos Campos, SP 12228-900, Brazil.
| | - Gilmar Patrocínio Thim
- Laboratory of Plasma and Processes (LPP), Technological Institute of Aeronautics (ITA), Praça Marechal Eduardo Gomes, 50, Vila das Acácias, São José dos Campos, SP 12228-900, Brazil.
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Parra-Nieto J, Del Cid MAG, de Cárcer IA, Baeza A. Inorganic Porous Nanoparticles for Drug Delivery in Antitumoral Therapy. Biotechnol J 2020; 16:e2000150. [PMID: 32476279 DOI: 10.1002/biot.202000150] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Revised: 05/21/2020] [Indexed: 12/26/2022]
Abstract
The use of nanoparticles in oncology to deliver chemotherapeutic agents has received considerable attention in the last decades due to their tendency to be passively accumulated in solid tumors. Besides this remarkable property, the surface of these nanocarriers can be decorated with targeting moieties capable to recognize malignant cells which lead to selective nanoparticle uptake mainly in the diseased cells, without affecting the healthy ones. Among the different nanocarriers which have been developed with this purpose, inorganic porous nanomaterials constitute some of the most interesting due to their unique properties such as excellent cargo capacity, high biocompatibility and chemical, thermal and mechanical robustness, among others. Additionally, these materials can be engineered to present an exquisite control in the drug release behavior placing stimuli-responsive pore-blockers or sensitive hybrid coats on their surface. Herein, the recent advances developed in the use of porous inorganic nanomedicines will be described in order to provide an overview of their huge potential in the look out of an efficient and safe therapy against this complex disease. Porous inorganic nanoparticles have been designed to be accumulated in tumoral tissues; once there to recognize the target cell and finally, to release their payload in a controlled manner.
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Affiliation(s)
- Jorge Parra-Nieto
- Dpto. Materiales y Producción Aeroespacial, ETSI Aeronáutica y del Espacio, Universidad Politécnica de Madrid, Madrid, 28040, Spain
| | - María Amor García Del Cid
- Dpto. Materiales y Producción Aeroespacial, ETSI Aeronáutica y del Espacio, Universidad Politécnica de Madrid, Madrid, 28040, Spain
| | - Iñigo Aguirre de Cárcer
- Dpto. Materiales y Producción Aeroespacial, ETSI Aeronáutica y del Espacio, Universidad Politécnica de Madrid, Madrid, 28040, Spain
| | - Alejandro Baeza
- Dpto. Materiales y Producción Aeroespacial, ETSI Aeronáutica y del Espacio, Universidad Politécnica de Madrid, Madrid, 28040, Spain
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Cabeza L, Perazzoli G, Mesas C, Jiménez-Luna C, Prados J, Rama AR, Melguizo C. Nanoparticles in Colorectal Cancer Therapy: Latest In Vivo Assays, Clinical Trials, and Patents. AAPS PharmSciTech 2020; 21:178. [PMID: 32591920 DOI: 10.1208/s12249-020-01731-y] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2020] [Accepted: 06/08/2020] [Indexed: 02/07/2023] Open
Abstract
Colorectal cancer (CRC) is the third most common cancer worldwide. Its poor response to current treatment options in advanced stages and the need for efficient diagnosis in early stages call for the development of new therapeutic and diagnostic strategies. Some of them are based on the use of nanometric materials as carriers and releasers of therapeutic agents and fluorescent molecules, or even on the utilization of magnetic materials that provide very interesting properties. These nanoformulations present several advantages compared with the free molecular cargo, including increased drug solubility, bioavailability, stability, and tumor specificity. Moreover, tumor multidrug resistance has been decreased in some cases, leading to improved treatment effectiveness by reducing drug dose and potential side effects. Here, we present an updated overview of the latest advances in clinical research, in vivo studies, and patents regarding the application of nanoformulations in the treatment of CRC. Based on the information gathered, a wide variety of nanomaterials are being investigated in clinical research, even in advanced phases, i.e., close to reaching the market. In sum, these novel materials can offer remarkable advantages with respect to current therapies, which could be complemented or even replaced by these nanosystems in the near future.
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Rahman HS, Othman HH, Hammadi NI, Yeap SK, Amin KM, Abdul Samad N, Alitheen NB. Novel Drug Delivery Systems for Loading of Natural Plant Extracts and Their Biomedical Applications. Int J Nanomedicine 2020; 15:2439-2483. [PMID: 32346289 PMCID: PMC7169473 DOI: 10.2147/ijn.s227805] [Citation(s) in RCA: 70] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2019] [Accepted: 10/10/2019] [Indexed: 12/18/2022] Open
Abstract
Many types of research have distinctly addressed the efficacy of natural plant metabolites used for human consumption both in cell culture and preclinical animal model systems. However, these in vitro and in vivo effects have not been able to be translated for clinical use because of several factors such as inefficient systemic delivery and bioavailability of promising agents that significantly contribute to this disconnection. Over the past decades, extraordinary advances have been made successfully on the development of novel drug delivery systems for encapsulation of plant active metabolites including organic, inorganic and hybrid nanoparticles. The advanced formulas are confirmed to have extraordinary benefits over conventional and previously used systems in the manner of solubility, bioavailability, toxicity, pharmacological activity, stability, distribution, sustained delivery, and both physical and chemical degradation. The current review highlights the development of novel nanocarrier for plant active compounds, their method of preparation, type of active ingredients, and their biomedical applications.
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Affiliation(s)
- Heshu Sulaiman Rahman
- Department of Physiology, College of Medicine, University of Sulaimani, Sulaymaniyah46001, Republic of Iraq
- Department of Medical Laboratory Sciences, College of Health Sciences, Komar University of Science and Technology, Sulaymaniyah, Republic of Iraq
| | - Hemn Hassan Othman
- Department of Pharmacology and Toxicology, College of Pharmacy, University of Sulaimani, Sulaymaniyah46001, Republic of Iraq
| | - Nahidah Ibrahim Hammadi
- Department of Histology, College of Veterinary Medicine, University of Al-Anbar, Ramadi, Republic of Iraq
| | - Swee Keong Yeap
- China-ASEAN College of Marine Sciences, Xiamen University Malaysia, Sepang, Malaysia
| | - Kawa Mohammad Amin
- Department of Microbiology, College of Medicine, University of Sulaimani, Sulaymaniyah46001, Republic of Iraq
| | - Nozlena Abdul Samad
- Integrative Medicine Cluster, Institut Perubatan dan Pergigian Termaju (IPPT), Sains@BERTAM, Universiti Sains Malaysia, Kepala Batas13200, Pulau Pinang, Malaysia
| | - Noorjahan Banu Alitheen
- Department of Cell and Molecular Biology, Faculty of Biotechnology and Bio-Molecular Sciences, Universiti Putra Malaysia, Selangor, Malaysia
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Site-Specific 111In-Radiolabeling of Dual-PEGylated Porous Silicon Nanoparticles and Their In Vivo Evaluation in Murine 4T1 Breast Cancer Model. Pharmaceutics 2019; 11:pharmaceutics11120686. [PMID: 31861119 PMCID: PMC6969933 DOI: 10.3390/pharmaceutics11120686] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2019] [Revised: 12/05/2019] [Accepted: 12/12/2019] [Indexed: 12/11/2022] Open
Abstract
Polyethylene glycol (PEG) has been successfully used for improving circulation time of several nanomaterials but prolonging the circulation of porous silicon nanoparticles (PSi NPs) has remained challenging. Here, we report a site specific radiolabeling of dual-PEGylated thermally oxidized porous silicon (DPEG-TOPSi) NPs and investigation of influence of the PEGylation on blood circulation time of TOPSi NPs. Trans-cyclooctene conjugated DPEG-TOPSi NPs were radiolabeled through a click reaction with [111In]In-DOTA-PEG4-tetrazine (DOTA = 1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetic acid) and the particle behavior was evaluated in vivo in Balb/c mice bearing 4T1 murine breast cancer allografts. The dual-PEGylation significantly prolonged circulation of [111In]In-DPEG-TOPSi particles when compared to non-PEGylated control particles, yielding 10.8 ± 1.7% of the injected activity/g in blood at 15 min for [111In]In-DPEG-TOPSi NPs. The improved circulation time will be beneficial for the accumulation of targeted DPEG-TOPSi to tumors.
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