1
|
Bakshi S, Pandey P, Mohammed Y, Wang J, Sailor MJ, Popat A, Parekh HS, Kumeria T. Porous silicon embedded in a thermoresponsive hydrogel for intranasal delivery of lipophilic drugs to treat rhinosinusitis. J Control Release 2023; 363:452-463. [PMID: 37769816 DOI: 10.1016/j.jconrel.2023.09.045] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2023] [Revised: 09/09/2023] [Accepted: 09/25/2023] [Indexed: 10/03/2023]
Abstract
Intranasal delivery is the most preferred route of drug administration for treatment of a range of nasal conditions including chronic rhinosinusitis (CRS), caused by an infection and inflammation of the nasal mucosa. However, localised delivery of lipophilic drugs for persistent nasal inflammation is a challenge especially with traditional topical nasal sprays. In this study, a composite thermoresponsive hydrogel is developed and tuned to obtain desired rheological and physiochemical properties suitable for intranasal administration of lipophilic drugs. The composite is comprised of drug-loaded porous silicon (pSi) particles embedded in a poloxamer 407 (P407) hydrogel matrix. Mometasone Furoate (MF), a lipophilic corticosteroid (log P of 4.11), is used as the drug, which is loaded onto pSi particles at a loading capacity of 28 wt%. The MF-loaded pSi particles (MF@pSi) are incorporated into the P407-based thermoresponsive hydrogel (HG) matrix to form the composite hydrogel (MF@pSi-HG) with a final drug content ranging between 0.1 wt% to 0.5 wt%. Rheomechanical studies indicate that the MF@pSi component exerts a minimal impact on gelation temperature or strength of the hydrogel host. The in-vitro release of the MF payload from MF@pSi-HG shows a pronounced increase in the amount of drug released over 8 h (4.5 to 21-fold) in comparison to controls consisting of pure MF incorporated in hydrogel (MF@HG), indicating an improvement in kinetic solubility of MF upon loading into pSi. Ex-vivo toxicity studies conducted on human nasal mucosal tissue show no adverse effect from exposure to either pure HG or the MF@pSi-HG formulation, even at the highest drug content of 0.5 wt%. Experiments on human nasal mucosal tissue show the MF@pSi-HG formulation deposits a quantity of MF into the tissues within 8 h that is >19 times greater than the MF@HG control (194 ± 7 μg of MF/g of tissue vs. <10 μg of MF/g of tissue, respectively).
Collapse
Affiliation(s)
- Shrishty Bakshi
- School of Pharmacy, The University of Queensland, Queensland 4102, Australia
| | - Preeti Pandey
- School of Pharmacy, The University of Queensland, Queensland 4102, Australia
| | - Yousuf Mohammed
- Therapeutics Research Group, Diamantina Institute, University of Queensland, Brisbane, Queensland 4102, Australia
| | - Joanna Wang
- Department of Radiology, School of Medicine, Stanford University, Stanford, CA 94305, United States of America
| | - Michael J Sailor
- Department of Chemistry and Biochemistry, University of California-San Diego, La Jolla, CA 92093, United States of America
| | - Amirali Popat
- School of Pharmacy, The University of Queensland, Queensland 4102, Australia.
| | - Harendra S Parekh
- School of Pharmacy, The University of Queensland, Queensland 4102, Australia.
| | - Tushar Kumeria
- School of Pharmacy, The University of Queensland, Queensland 4102, Australia; School of Materials Science and Engineering, The University of New South Wales, New South Wales 2052, Australia; Australian Centre for Nanomedicine, The University of New South Wales, New South Wales 2052, Australia.
| |
Collapse
|
2
|
Chaix A, Cueto-Diaz E, Dominguez-Gil S, Spiteri C, Lichon L, Maynadier M, Dumail X, Aggad D, Delalande A, Bessière A, Pichon C, Chiappini C, Sailor MJ, Bettache N, Gary-Bobo M, Durand JO, Nguyen C, Cunin F. Two-Photon Light Trigger siRNA Transfection of Cancer Cells Using Non-Toxic Porous Silicon Nanoparticles. Adv Healthc Mater 2023; 12:e2301052. [PMID: 37499629 DOI: 10.1002/adhm.202301052] [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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2023] [Revised: 07/23/2023] [Indexed: 07/29/2023]
Abstract
The concept of using two-photon excitation in the NIR for the spatiotemporal control of biological processes holds great promise. However, its use for the delivery of nucleic acids has been very scarcely described and the reported procedures are not optimal as they often involve potentially toxic materials and irradiation conditions. This work prepares a simple system made of biocompatible porous silicon nanoparticles (pSiNP) for the safe siRNA photocontrolled delivery and gene silencing in cells upon two-photon excitation. PSiNP are linked to an azobenzene moiety, which possesses a lysine group (pSiNP@ICPES-azo@Lys) to efficiently complex siRNA. Non-linear excitation of the two-photon absorber system (pSiNP) followed by intermolecular energy transfer (FRET) to trans azobenzene moiety, result in the photoisomerization of the azobenzene from trans to cis and in the destabilization of the azobenzene-siRNA complex, thus inducing the delivery of the cargo siRNA to the cytoplasm of cells. Efficient silencing in MCF-7 expressing stable firefly luciferase with siRNAluc against luciferase is observed. Furthermore, siRNA against inhibitory apoptotic protein (IAP) leads to over 70% of MCF-7 cancer cell death. The developed technique using two-photon light allows a unique high spatiotemporally controlled and safe siRNA delivery in cells in few seconds of irradiation.
Collapse
Affiliation(s)
- Arnaud Chaix
- ICGM, CNRS, ENSCM, University of Montpellier, Montpellier, 34293, France
| | - Eduardo Cueto-Diaz
- ICGM, CNRS, ENSCM, University of Montpellier, Montpellier, 34293, France
| | | | - Chantelle Spiteri
- Centre for Craniofacial and Regenerative Biology, King's College London, London, SE1 9RT, UK
- London Centre for Nanotechnology, King's College London, London, WC2R 2LS, UK
| | - Laure Lichon
- IBMM, Univ. Montpellier, CNRS, ENSCM, Montpellier, 34093, France
| | - Marie Maynadier
- NanoMedSyn Avenue Charles Flahault, Montpellier Cedex 05, 34093, France
| | - Xavier Dumail
- ICGM, CNRS, ENSCM, University of Montpellier, Montpellier, 34293, France
| | - Dina Aggad
- IBMM, Univ. Montpellier, CNRS, ENSCM, Montpellier, 34093, France
| | - Anthony Delalande
- Centre de Biophysique Moléculaire, CNRS UPR4301, Orléans cedex 02, F-45071, France
- Inserm UMS 55, ART ARNm and University of Orléans, Orléans, F-45100, France
- Institut Universitaire de France, 1 rue Descartes, Paris, F-75035, France
| | - Aurélie Bessière
- ICGM, CNRS, ENSCM, University of Montpellier, Montpellier, 34293, France
| | - Chantal Pichon
- Centre de Biophysique Moléculaire, CNRS UPR4301, Orléans cedex 02, F-45071, France
- Inserm UMS 55, ART ARNm and University of Orléans, Orléans, F-45100, France
- Institut Universitaire de France, 1 rue Descartes, Paris, F-75035, France
| | - Ciro Chiappini
- Centre for Craniofacial and Regenerative Biology, King's College London, London, SE1 9RT, UK
- London Centre for Nanotechnology, King's College London, London, WC2R 2LS, UK
| | - Michael J Sailor
- University of California, San Diego, Department of Chemistry and Biochemistry, 9500 Gilman Drive, m/c 0358, La Jolla, CA, 92093, USA
| | - Nadir Bettache
- IBMM, Univ. Montpellier, CNRS, ENSCM, Montpellier, 34093, France
| | - Magali Gary-Bobo
- IBMM, Univ. Montpellier, CNRS, ENSCM, Montpellier, 34093, France
| | | | | | - Frédérique Cunin
- ICGM, CNRS, ENSCM, University of Montpellier, Montpellier, 34293, France
| |
Collapse
|
3
|
Sailor MJ. The Three Laws of Nano-Robotics. ACS Sens 2023; 8:1868-1870. [PMID: 37231672 DOI: 10.1021/acssensors.3c00920] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
|
4
|
Vijayakumar S, Nasr SH, Davis JE, Wang E, Zuidema JM, Lu YS, Lo YH, Sicklick JK, Sailor MJ, Ray P. Anti-KIT DNA aptamer-conjugated porous silicon nanoparticles for the targeted detection of gastrointestinal stromal tumors. Nanoscale 2022; 14:17700-17713. [PMID: 36416809 PMCID: PMC9744628 DOI: 10.1039/d2nr03905b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Evaluation of Gastrointestinal Stromal Tumors (GIST) during initial clinical staging, surgical intervention, and postoperative management can be challenging. Current imaging modalities (e.g., PET and CT scans) lack sensitivity and specificity. Therefore, advanced clinical imaging modalities that can provide clinically relevant images with high resolution would improve diagnosis. KIT is a tyrosine kinase receptor overexpressed on GIST. Here, the application of a specific DNA aptamer targeting KIT, decorated onto a fluorescently labeled porous silicon nanoparticle (pSiNP), is used for the in vitro & in vivo imaging of GIST. This nanoparticle platform provides high-fidelity GIST imaging with minimal cellular toxicity. An in vitro analysis shows greater than 15-fold specific KIT protein targeting compared to the free KIT aptamer, while in vivo analyses of GIST-burdened mice that had been injected intravenously (IV) with aptamer-conjugated pSiNPs show extensive nanoparticle-to-tumor signal co-localization (>90% co-localization) compared to control particles. This provides an effective platform for which aptamer-conjugated pSiNP constructs can be used for the imaging of KIT-expressing cancers or for the targeted delivery of therapeutics.
Collapse
Affiliation(s)
- Sanahan Vijayakumar
- Materials Science and Engineering Program, University of California, San Diego, La Jolla, California, 92093, USA.
| | - Seyedmehdi H Nasr
- Department of Chemistry & Biochemistry, University of California, San Diego, La Jolla, California, 92093, USA
| | - Jacob E Davis
- Department of Surgery, Division of Surgical Oncology, University of California, San Diego, San Diego, California, 92093, USA.
- Moores Cancer Center, University of California, San Diego, La Jolla, California, 92093, USA
| | - Edward Wang
- Materials Science and Engineering Program, University of California, San Diego, La Jolla, California, 92093, USA.
| | - Jonathan M Zuidema
- Department of Chemistry & Biochemistry, University of California, San Diego, La Jolla, California, 92093, USA
- Department of Neurosciences, University of California, San Diego, San Diego, California, 92093, USA
| | - Yi-Sheng Lu
- Materials Science and Engineering Program, University of California, San Diego, La Jolla, California, 92093, USA.
| | - Yu-Hwa Lo
- Materials Science and Engineering Program, University of California, San Diego, La Jolla, California, 92093, USA.
- Department of Electrical & Computer Engineering, University of California, San Diego, La Jolla, California, 92093, USA
| | - Jason K Sicklick
- Department of Surgery, Division of Surgical Oncology, University of California, San Diego, San Diego, California, 92093, USA.
- Moores Cancer Center, University of California, San Diego, La Jolla, California, 92093, USA
- Department of Pharmacology, University of California, San Diego, San Diego, California, 92093, USA
| | - Michael J Sailor
- Materials Science and Engineering Program, University of California, San Diego, La Jolla, California, 92093, USA.
- Department of Chemistry & Biochemistry, University of California, San Diego, La Jolla, California, 92093, USA
| | - Partha Ray
- Department of Surgery, Division of Surgical Oncology, University of California, San Diego, San Diego, California, 92093, USA.
- Moores Cancer Center, University of California, San Diego, La Jolla, California, 92093, USA
| |
Collapse
|
5
|
Grondek JF, Huffman K, Lee EJ, Cavichini M, Warter A, P Kalaw FG, Heinke A, Fan R, Cheng L, Sailor MJ, Freeman WR. Effective treatment of retinal neovascular leakage with fusogenic porous silicon nanoparticles delivering VEGF-siRNA. Nanomedicine (Lond) 2022; 17:2089-2108. [PMID: 36748946 PMCID: PMC10031552 DOI: 10.2217/nnm-2022-0255] [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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Accepted: 01/13/2023] [Indexed: 02/08/2023] Open
Abstract
Aim: To evaluate an intravitreally injected nanoparticle platform designed to deliver VEGF-A siRNA to inhibit retinal neovascular leakage as a new treatment for proliferative diabetic retinopathy and diabetic macular edema. Materials & methods: Fusogenic lipid-coated porous silicon nanoparticles loaded with VEGF-A siRNA, and pendant neovascular integrin-homing iRGD, were evaluated for efficacy by intravitreal injection in a rabbit model of retinal neovascularization. Results: For 12 weeks post-treatment, a reduction in vascular leakage was observed for treated diseased eyes versus control eyes (p = 0.0137), with a corresponding reduction in vitreous VEGF-A. Conclusion: Fusogenic lipid-coated porous silicon nanoparticles siRNA delivery provides persistent knockdown of VEGF-A and reduced leakage in a rabbit model of retinal neovascularization as a potential new intraocular therapeutic.
Collapse
Affiliation(s)
- Joel F Grondek
- Department of Chemistry & Biochemistry, University of California, San Diego, CA 92093, USA
| | - Kristyn Huffman
- Department of Ophthalmology, Jacobs Retinal Center at Shiley Eye Institute, University of California, San Diego, CA 92093, USA
| | - Ella Jiyoon Lee
- Department of Chemistry & Biochemistry, University of California, San Diego, CA 92093, USA
| | - Melina Cavichini
- Department of Ophthalmology, Jacobs Retinal Center at Shiley Eye Institute, University of California, San Diego, CA 92093, USA
| | - Alexandra Warter
- Department of Ophthalmology, Jacobs Retinal Center at Shiley Eye Institute, University of California, San Diego, CA 92093, USA
| | - Fritz Gerald P Kalaw
- Department of Ophthalmology, Jacobs Retinal Center at Shiley Eye Institute, University of California, San Diego, CA 92093, USA
| | - Anna Heinke
- Department of Ophthalmology, Jacobs Retinal Center at Shiley Eye Institute, University of California, San Diego, CA 92093, USA
| | - Ruhan Fan
- Materials Science & Engineering, University of California, San Diego, CA 92093, USA
| | - Lingyun Cheng
- Department of Ophthalmology, Jacobs Retinal Center at Shiley Eye Institute, University of California, San Diego, CA 92093, USA
| | - Michael J Sailor
- Department of Chemistry & Biochemistry, University of California, San Diego, CA 92093, USA
- Materials Science & Engineering, University of California, San Diego, CA 92093, USA
| | - William R Freeman
- Department of Ophthalmology, Jacobs Retinal Center at Shiley Eye Institute, University of California, San Diego, CA 92093, USA
| |
Collapse
|
6
|
Sailor MJ. The Future of Engineered Living Sensors ─ I Hope It Is Not the Thing with Feathers. ACS Sens 2022; 7:2795-2796. [DOI: 10.1021/acssensors.2c02178] [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]
|
7
|
Jeong M, Jung Y, Yoon J, Kang J, Lee SH, Back W, Kim H, Sailor MJ, Kim D, Park JH. Porous Silicon-Based Nanomedicine for Simultaneous Management of Joint Inflammation and Bone Erosion in Rheumatoid Arthritis. ACS Nano 2022; 16:16118-16132. [PMID: 36214219 DOI: 10.1021/acsnano.2c04491] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [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: 06/16/2023]
Abstract
The lack of drugs that target both disease progression and tissue preservation makes it difficult to effectively manage rheumatoid arthritis (RA). Here, we report a porous silicon-based nanomedicine that efficiently delivers an antirheumatic drug to inflamed synovium while degrading into bone-remodeling products. Methotrexate (MTX) is loaded into the porous silicon nanoparticles using a calcium silicate based condenser chemistry. The calcium silicate-porous silicon nanoparticle constructs (pCaSiNPs) degrade and release the drug preferentially in an inflammatory environment. The biodegradation products of the pCaSiNP drug carrier are orthosilicic acid and calcium ions, which exhibit immunomodulatory and antiresorptive effects. In a mouse model of collagen-induced arthritis, systemically administered MTX-loaded pCaSiNPs accumulate in the inflamed joints and ameliorate the progression of RA at both early and established stages of the disease. The disease state readouts show that the combination is more effective than the monotherapies.
Collapse
Affiliation(s)
- Moonkyoung Jeong
- Department of Bio and Brain Engineering and KAIST Institute for Health Science and Technology, Korea Advanced Institute of Science and Technology (KAIST), Daejeon34141, Republic of Korea
| | - Yuna Jung
- Department of Biomedical Science, Graduate School, Kyung Hee University, Seoul02447, Republic of Korea
| | - Junyong Yoon
- Department of Bio and Brain Engineering and KAIST Institute for Health Science and Technology, Korea Advanced Institute of Science and Technology (KAIST), Daejeon34141, Republic of Korea
| | | | - Seo Hyeon Lee
- Department of Biomedical Science, Graduate School, Kyung Hee University, Seoul02447, Republic of Korea
| | - Woojin Back
- Department of Bio and Brain Engineering and KAIST Institute for Health Science and Technology, Korea Advanced Institute of Science and Technology (KAIST), Daejeon34141, Republic of Korea
| | - Hyoyeon Kim
- Department of Bio and Brain Engineering and KAIST Institute for Health Science and Technology, Korea Advanced Institute of Science and Technology (KAIST), Daejeon34141, Republic of Korea
| | | | - Dokyoung Kim
- Department of Biomedical Science, Graduate School, Kyung Hee University, Seoul02447, Republic of Korea
| | - Ji-Ho Park
- Department of Bio and Brain Engineering and KAIST Institute for Health Science and Technology, Korea Advanced Institute of Science and Technology (KAIST), Daejeon34141, Republic of Korea
| |
Collapse
|
8
|
Kumeria T, Wang J, Kim B, Park JH, Zuidema JM, Klempner M, Cavacini L, Wang Y, Sailor MJ. Enteric Polymer-Coated Porous Silicon Nanoparticles for Site-Specific Oral Delivery of IgA Antibody. ACS Biomater Sci Eng 2022; 8:4140-4152. [PMID: 36210772 PMCID: PMC10036216 DOI: 10.1021/acsbiomaterials.0c01313] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [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] [Indexed: 01/10/2023]
Abstract
Porous silicon (pSi) nanoparticles are loaded with Immunoglobulin A-2 (IgA2) antibodies, and the assembly is coated with pH-responsive polymers on the basis of the Eudragit family of enteric polymers (L100, S100, and L30-D55). The temporal release of the protein from the nanocomposite formulations is quantified following an in vitro protocol simulating oral delivery: incubation in simulated gastric fluid (SGF; at pH 1.2) for 2 h, followed by a fasting state simulated intestinal fluid (FasSIF; at pH 6.8) or phosphate buffer solution (PBS; at pH 7.4). The nanocomposite formulations display a negligible release in SGF, while more than 50% of the loaded IgA2 is released in solutions at a pH of 6.8 (FasSIF) or 7.4 (PBS). Between 21 and 44% of the released IgA2 retains its functional activity. A capsule-based system is also evaluated, where the IgA2-loaded particles are packed into a gelatin capsule and the capsule is coated with either EudragitL100 or EudragitS100 polymer for a targeted release in the small intestine or the colon, respectively. The capsule-based formulations outperform polymer-coated nanoparticles in vitro, preserving 45-54% of the activity of the released protein.
Collapse
Affiliation(s)
- Tushar Kumeria
- Department of Chemistry and Biochemistry, University of California, San Diego, California 92093, United States
- School of Materials Science and Engineering, University of New South Wales-Sydney, Sydney, NSW 2052, Australia
| | - Joanna Wang
- Materials Science and Engineering Program, University of California, San Diego, California 92093, United States
| | - Byungji Kim
- Materials Science and Engineering Program, University of California, San Diego, California 92093, United States
| | - Ji-Ho Park
- Department of Bio and Brain Engineering, KAIST, Daejeon 34141, Korea
| | - Jonathan M Zuidema
- Department of Chemistry and Biochemistry, University of California, San Diego, California 92093, United States
| | - Mark Klempner
- MassBiologics of the University of Massachusetts Medical School, Boston, Massachusetts 02126, United States
| | - Lisa Cavacini
- MassBiologics of the University of Massachusetts Medical School, Boston, Massachusetts 02126, United States
| | - Yang Wang
- MassBiologics of the University of Massachusetts Medical School, Boston, Massachusetts 02126, United States
| | - Michael J Sailor
- Department of Chemistry and Biochemistry, University of California, San Diego, California 92093, United States
| |
Collapse
|
9
|
Waggoner LE, Kang J, Zuidema JM, Vijayakumar S, Hurtado AA, Sailor MJ, Kwon EJ. Porous Silicon Nanoparticles Targeted to the Extracellular Matrix for Therapeutic Protein Delivery in Traumatic Brain Injury. Bioconjug Chem 2022; 33:1685-1697. [PMID: 36017941 PMCID: PMC9492643 DOI: 10.1021/acs.bioconjchem.2c00305] [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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Traumatic brain injury (TBI) is a major cause of disability and death among children and young adults in the United States, yet there are currently no treatments that improve the long-term brain health of patients. One promising therapeutic for TBI is brain-derived neurotrophic factor (BDNF), a protein that promotes neurogenesis and neuron survival. However, outstanding challenges to the systemic delivery of BDNF are its instability in blood, poor transport into the brain, and short half-life in circulation and brain tissue. Here, BDNF is encapsulated into an engineered, biodegradable porous silicon nanoparticle (pSiNP) in order to deliver bioactive BDNF to injured brain tissue after TBI. The pSiNP carrier is modified with the targeting ligand CAQK, a peptide that binds to extracellular matrix components upregulated after TBI. The protein cargo retains bioactivity after release from the pSiNP carrier, and systemic administration of the CAQK-modified pSiNPs results in effective delivery of the protein cargo to injured brain regions in a mouse model of TBI. When administered after injury, the CAQK-targeted pSiNP delivery system for BDNF reduces lesion volumes compared to free BDNF, supporting the hypothesis that pSiNPs mediate therapeutic protein delivery after systemic administration to improve outcomes in TBI.
Collapse
Affiliation(s)
- Lauren E. Waggoner
- Department of Nanoengineering, University of California, San Diego, La Jolla, CA, 92093, USA
| | - Jinyoung Kang
- Department of Nanoengineering, University of California, San Diego, La Jolla, CA, 92093, USA
| | - Jonathan M. Zuidema
- Department of Chemistry & Biochemistry, University of California, San Diego, La Jolla, CA, 92093, USA
- Department of Neuroscience, University of California, San Diego, La Jolla, CA, 92093, USA
| | - Sanahan Vijayakumar
- Department of Chemistry & Biochemistry, University of California, San Diego, La Jolla, CA, 92093, USA
| | - Alan A. Hurtado
- Department of Bioengineering, University of California, San Diego, La Jolla, CA, 92093, USA
| | - Michael J. Sailor
- Department of Nanoengineering, University of California, San Diego, La Jolla, CA, 92093, USA
- Department of Chemistry & Biochemistry, University of California, San Diego, La Jolla, CA, 92093, USA
- Department of Bioengineering, University of California, San Diego, La Jolla, CA, 92093, USA
| | - Ester J. Kwon
- Department of Bioengineering, University of California, San Diego, La Jolla, CA, 92093, USA
| |
Collapse
|
10
|
Guo K, Alba M, Chin GP, Tong Z, Guan B, Sailor MJ, Voelcker NH, Prieto-Simón B. Designing Electrochemical Biosensing Platforms Using Layered Carbon-Stabilized Porous Silicon Nanostructures. ACS Appl Mater Interfaces 2022; 14:15565-15575. [PMID: 35286082 PMCID: PMC9682479 DOI: 10.1021/acsami.2c02113] [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] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Porous silicon (pSi) is an established porous material that offers ample opportunities for biosensor design thanks to its tunable structure, versatile surface chemistry, and large surface area. Nonetheless, its potential for electrochemical sensing is relatively unexplored. This study investigates layered carbon-stabilized pSi nanostructures with site-specific functionalities as an electrochemical biosensor. A double-layer nanostructure combining a top hydrophilic layer of thermally carbonized pSi (TCpSi) and a bottom hydrophobic layer of thermally hydrocarbonized pSi (THCpSi) is prepared. The modified layers are formed in a stepwise process, involving first an electrochemical anodization step to generate a porous layer with precisely defined pore morphological features, followed by deposition of a thin thermally carbonized coating on the pore walls via temperature-controlled acetylene decomposition. The second layer is then generated beneath the first by following the same two-step process, but the acetylene decomposition conditions are adjusted to deposit a thermally hydrocarbonized coating. The double-layer platform features excellent electrochemical properties such as fast electron-transfer kinetics, which underpin the performance of a TCpSi-THCpSi voltammetric DNA sensor. The biosensor targets a 28-nucleotide single-stranded DNA sequence with a detection limit of 0.4 pM, two orders of magnitude lower than the values reported to date by any other pSi-based electrochemical DNA sensor.
Collapse
Affiliation(s)
- Keying Guo
- Monash
Institute of Pharmaceutical Sciences, Monash
University, Parkville, Victoria 3052, Australia
- Melbourne
Centre for Nanofabrication, Victorian Node
of the Australian National Fabrication Facility, Clayton, Victoria 3168, Australia
| | - Maria Alba
- Monash
Institute of Pharmaceutical Sciences, Monash
University, Parkville, Victoria 3052, Australia
- Melbourne
Centre for Nanofabrication, Victorian Node
of the Australian National Fabrication Facility, Clayton, Victoria 3168, Australia
- Commonwealth
Scientific and Industrial Research Organisation (CSIRO), Clayton, Victoria 3168, Australia
| | - Grace Pei Chin
- Monash
Institute of Pharmaceutical Sciences, Monash
University, Parkville, Victoria 3052, Australia
| | - Ziqiu Tong
- Monash
Institute of Pharmaceutical Sciences, Monash
University, Parkville, Victoria 3052, Australia
| | - Bin Guan
- Future
Industries Institute, University of South
Australia, Mawson
Lakes, South Australia 5095, Australia
| | - Michael J. Sailor
- Department
of Chemistry and Biochemistry and Department of Nanoengineering, University of California, San Diego, La Jolla, California 92093-0358, United States
| | - Nicolas H. Voelcker
- Monash
Institute of Pharmaceutical Sciences, Monash
University, Parkville, Victoria 3052, Australia
- Melbourne
Centre for Nanofabrication, Victorian Node
of the Australian National Fabrication Facility, Clayton, Victoria 3168, Australia
- Commonwealth
Scientific and Industrial Research Organisation (CSIRO), Clayton, Victoria 3168, Australia
| | - Beatriz Prieto-Simón
- Department
of Electronic Engineering, Universitat Rovira
i Virgili, Tarragona 43007, Spain
- ICREA, Pg. Lluís Companys 23, Barcelona 08010, Spain
| |
Collapse
|
11
|
Neri M, Kang J, Zuidema JM, Gasparello J, Finotti A, Gambari R, Sailor MJ, Bertucci A, Corradini R. Tuning the Loading and Release Properties of MicroRNA-Silencing Porous Silicon Nanoparticles by Using Chemically Diverse Peptide Nucleic Acid Payloads. ACS Biomater Sci Eng 2021; 8:4123-4131. [PMID: 34468123 PMCID: PMC9554869 DOI: 10.1021/acsbiomaterials.1c00431] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [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] [Indexed: 12/30/2022]
Abstract
Peptide nucleic acids (PNAs) are a class of artificial oligonucleotide mimics that have garnered much attention as precision biotherapeutics for their efficient hybridization properties and their exceptional biological and chemical stability. However, the poor cellular uptake of PNA is a limiting factor to its more extensive use in biomedicine; encapsulation in nanoparticle carriers has therefore emerged as a strategy for internalization and delivery of PNA in cells. In this study, we demonstrate that PNA can be readily loaded into porous silicon nanoparticles (pSiNPs) following a simple salt-based trapping procedure thus far employed only for negatively charged synthetic oligonucleotides. We show that the ease and versatility of PNA chemistry also allows for producing PNAs with different net charge, from positive to negative, and that the use of differently charged PNAs enables optimization of loading into pSiNPs. Differently charged PNA payloads determine different release kinetics and allow modulation of the temporal profile of the delivery process. In vitro silencing of a set of specific microRNAs using a pSiNP-PNA delivery platform demonstrates the potential for biomedical applications.
Collapse
Affiliation(s)
- Martina Neri
- Department of Chemistry, Life Sciences and Environmental Sustainability, University of Parma, Parco Area delle Scienze 17/A, 43124 Parma, Italy
| | - Jinyoung Kang
- Department of Nanoengineering, University of California San Diego, 9500 Gilman Drive, La Jolla, California 92093, United States
| | - Jonathan M Zuidema
- Department of Chemistry and Biochemistry and Department of Neurosciences, University of California San Diego, 9500 Gilman Drive, La Jolla, California 92093, United States
| | - Jessica Gasparello
- Department of Life Sciences and Biotechnology, University of Ferrara, Via Fossato di Mortara 74, 44121 Ferrara, Italy
| | - Alessia Finotti
- Department of Life Sciences and Biotechnology, University of Ferrara, Via Fossato di Mortara 74, 44121 Ferrara, Italy
| | - Roberto Gambari
- Department of Life Sciences and Biotechnology, University of Ferrara, Via Fossato di Mortara 74, 44121 Ferrara, Italy
| | - Michael J Sailor
- Department of Chemistry and Biochemistry, University of California San Diego, 9500 Gilman Drive, La Jolla, California 92093, United States
| | - Alessandro Bertucci
- Department of Chemistry, Life Sciences and Environmental Sustainability, University of Parma, Parco Area delle Scienze 17/A, 43124 Parma, Italy
| | - Roberto Corradini
- Department of Chemistry, Life Sciences and Environmental Sustainability, University of Parma, Parco Area delle Scienze 17/A, 43124 Parma, Italy
| |
Collapse
|
12
|
Xiao Y, Choi KS, Warther D, Huffman K, Landeros S, Freeman WR, Sailor MJ, Cheng L. A sustained dual drug delivery system for proliferative vitreoretinopathy. Drug Deliv 2021; 27:1461-1473. [PMID: 33100053 PMCID: PMC7594716 DOI: 10.1080/10717544.2020.1833382] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [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] [Indexed: 11/04/2022] Open
Abstract
Proliferative vitreoretinopathy (PVR) is a significant threat for vision recovery from retinal detachment or ocular trauma. Currently, no approved pharmacological intervention to prevent PVR. Daunorubicin (DNR) and dexamethasone (DEX) were sequentially loaded into oxidized porous silicon (pSiO2) particles by covalent conjugation. The DNR + DEX-loaded particles, and control particles loaded with DNR only and DEX only were incubated with RPE-populated collagen for daily gel surface quantitation. Toxicity was monitored by ophthalmic examinations and histological evaluation 21 days after injection. At 3rd week following intravitreal injection, a localized retinal detachment (RD) was created by subretinal injection of Healon in all pretreated eyes in addition to 3 non-interventional control eyes. 10 µg of bromodeoxyuridine (BrdU) was injected into the vitreous 4 h before sacrifice on day 3 after RD induction. Retinal sections were stained for glial fibrillary green protein (GFAP) and BrdU to identify activated glial cells and retinal cell proliferation. The studies demonstrated that all three pSiO2 particle types were well tolerated in vivo. DNR alone and DNR + DEX combination formulations demonstrated equally strong suppression on gel contraction (least square mean area of the gel: control = 1.71 vs. 30DNR = 1.85 or 30/40Dual = 1.83, p < .05). Eyes pretreated with pSiO2−DNR + DEX exhibited the least GFAP activation (least square mean intensity mm−2: Dual = 4.03, DNR = 7.76, Dex = 16.23, control = 29.11, p < .05) and BrdU expression (Mean number of BrdU positive cells per mm of retina: Dual = 2.77, DNR = 4.58, Dex = 4.01, control = 6.16, p < .05). The synergistic effect of a sustained release pSiO2−DNR/DEX showed promise for the prevention of PVR development while reducing the necessary therapeutic concentration of each drug.
Collapse
Affiliation(s)
- Ying Xiao
- Department of Ophthalmology, Jacobs Retina Center at Shiley Eye Institute, University of California San Diego, La Jolla, CA, USA
| | - Kyung Seek Choi
- Department of Ophthalmology, Jacobs Retina Center at Shiley Eye Institute, University of California San Diego, La Jolla, CA, USA
| | - David Warther
- Department of Chemistry and Biochemistry, University of California San Diego, La Jolla, CA, USA
| | - Kristyn Huffman
- Department of Ophthalmology, Jacobs Retina Center at Shiley Eye Institute, University of California San Diego, La Jolla, CA, USA
| | - Stephanie Landeros
- Department of Ophthalmology, Jacobs Retina Center at Shiley Eye Institute, University of California San Diego, La Jolla, CA, USA
| | - William R Freeman
- Department of Ophthalmology, Jacobs Retina Center at Shiley Eye Institute, University of California San Diego, La Jolla, CA, USA
| | - Michael J Sailor
- Department of Chemistry and Biochemistry, University of California San Diego, La Jolla, CA, USA
| | - Lingyun Cheng
- Department of Ophthalmology, Jacobs Retina Center at Shiley Eye Institute, University of California San Diego, La Jolla, CA, USA
| |
Collapse
|
13
|
Sailor MJ. Computationally Enabled Sensors. ACS Sens 2021; 6:1988-1989. [PMID: 34167306 DOI: 10.1021/acssensors.1c01189] [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]
|
14
|
Kim B, Yang Q, Chan LW, Bhatia SN, Ruoslahti E, Sailor MJ. Fusogenic porous silicon nanoparticles as a broad-spectrum immunotherapy against bacterial infections. Nanoscale Horiz 2021; 6:330-340. [PMID: 33599221 PMCID: PMC8098644 DOI: 10.1039/d0nh00624f] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Bacterial infections are re-emerging as substantial threats to global health due to the limited selection of antibiotics that are capable of overcoming antibiotic-resistant strains. By deterring such mutations whilst minimizing the need to develop new pathogen-specific antibiotics, immunotherapy offers a broad-spectrum therapeutic solution against bacterial infections. In particular, pathology resulting from excessive immune response (i.e. fibrosis, necrosis, exudation, breath impediment) contributes significantly to negative disease outcome. Herein, we present a nanoparticle that is targeted to activated macrophages and loaded with siRNA against the Irf5 gene. This formulation is able to induce >80% gene silencing in activated macrophages in vivo, and it inhibits the excessive inflammatory response, generating a significantly improved therapeutic outcome in mouse models of bacterial infection. The versatility of the approach is demonstrated using mice with antibiotic-resistant Gram-positive (methicillin-resistant Staphylococcus aureus) and Gram-negative (Pseudomonas aeruginosa) muscle and lung infections, respectively. Effective depletion of the Irf5 gene in macrophages is found to significantly improve the therapeutic outcome of infected mice, regardless of the bacteria strain and type.
Collapse
Affiliation(s)
- Byungji Kim
- Materials Science and Engineering Program, University of California, San Diego, 9500 Gilman Dr, La Jolla, CA 92093, USA.
| | | | | | | | | | | |
Collapse
|
15
|
Lu YS, Vijayakumar S, Chaix A, Pimentel BR, Bentz KC, Li S, Chan A, Wahl C, Ha JS, Hunka DE, Boss GR, Cohen SM, Sailor MJ. Remote Detection of HCN, HF, and Nerve Agent Vapors Based on Self-Referencing, Dye-Impregnated Porous Silicon Photonic Crystals. ACS Sens 2021; 6:418-428. [PMID: 33263399 DOI: 10.1021/acssensors.0c01931] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
A one-dimensional photonic crystal is prepared from porous silicon (pSi) and impregnated with a chemically specific colorimetric indicator dye to provide a self-referenced vapor sensor for the selective detection of hydrogen fluoride (HF), hydrogen cyanide (HCN), and the chemical nerve agent diisopropyl fluorophosphate (DFP). The photonic crystal is prepared with two stop bands: one that coincides with the optical absorbance of the relevant activated indicator dye and the other in a spectrally "clear" region, to provide a reference. The inner pore walls of the pSi sample are then modified with octadecylsilane to provide a hydrophobic interior, and the indicator dye of interest is then loaded into the mesoporous matrix. Remote analyte detection is achieved by measurement of the intensity ratio of the two stop bands in the white light reflectance spectrum, which provides a means to reliably detect colorimetric changes in the indicator dye. Indicator dyes were chosen for their specificity for the relevant agents: rhodamine-imidazole (RDI) for HF and DFP, and monocyanocobinamide (MCbi) for HCN. The ratiometric readout allows detection of HF and HCN at concentrations (14 and 5 ppm, respectively) that are below their respective IDLH (immediately dangerous to life and health) concentrations (30 ppm for HF; 50 ppm for HCN); detection of DFP at a concentration of 114 ppb is also demonstrated. The approach is insensitive to potential interferents such as ammonia, hydrogen chloride, octane, and the 43-component mixture of VOCs known as EPA TO-14A, and to variations in relative humidity (20-80% RH). Detection of HF and HCN spiked into the complex mixture EPA TO-14A is demonstrated. The approach provides a general means to construct robust remote detection systems for chemical agents.
Collapse
Affiliation(s)
- Yi-Sheng Lu
- Materials Science and Engineering Program, University of California, San Diego, La Jolla, California 92093, United States
| | - Sanahan Vijayakumar
- Materials Science and Engineering Program, University of California, San Diego, La Jolla, California 92093, United States
| | - Arnaud Chaix
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California 92093, United States
| | - Brian R. Pimentel
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California 92093, United States
| | - Kyle C. Bentz
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California 92093, United States
| | - Sheng Li
- Department of Medicine, University of California, San Diego, La Jolla, California 92093, United States
| | - Adriano Chan
- Department of Medicine, University of California, San Diego, La Jolla, California 92093, United States
| | - Charlotte Wahl
- Leidos, 10260 Campus Point Drive, San Diego, California 92121, United States
| | - James S. Ha
- Leidos, 10260 Campus Point Drive, San Diego, California 92121, United States
| | - Deborah E. Hunka
- Leidos, 10260 Campus Point Drive, San Diego, California 92121, United States
| | - Gerry R. Boss
- Department of Medicine, University of California, San Diego, La Jolla, California 92093, United States
| | - Seth M. Cohen
- Materials Science and Engineering Program, University of California, San Diego, La Jolla, California 92093, United States
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California 92093, United States
| | - Michael J. Sailor
- Materials Science and Engineering Program, University of California, San Diego, La Jolla, California 92093, United States
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California 92093, United States
| |
Collapse
|
16
|
Sun Y, Huffman K, Freeman WR, Sailor MJ, Cheng L. Intravitreal safety profiles of sol-gel mesoporous silica microparticles and the degradation product (Si(OH) 4). Drug Deliv 2021; 27:703-711. [PMID: 32393079 PMCID: PMC7269085 DOI: 10.1080/10717544.2020.1760401] [Citation(s) in RCA: 6] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
Mesoporous silica has attracted significant attention in the drug delivery area; however, impurities can be a source of toxicity. The current study used commercial microparticles produced at large scale in a well-controlled environment. Micrometer sized mesoporous silica particles were acquired through a commercial vendor and pore structures were characterized by SEM. The three silica particle formulations had a diameter of 15 micrometers and three different pore sizes of 10 nm, 30 nm, and 100 nm. The fourth formulation had particle size of 20–40 micrometers with 50 nm pores. Before in vivo tests, an in vitro cytotoxicity test was conducted with silicic acid, derived from the sol-gel particles, on EA.hy926 cells. Low concentration (2.5 µg/mL) of silicic acid showed no cytotoxicity; however, high concentration (25 µg/mL) was cytotoxic. In vivo intravitreal injection demonstrated that 15 um silica particles with 10 nm pore were safe in both rabbit and guinea pig eyes and the particles lasted in the vitreous for longer than two months. Formulations of with larger pores demonstrated variable localized vitreous cloudiness around the sol-gel particle depot and mild inflammatory cells in the aqueous humor. The incidence of reaction trended higher with larger pores (10 nm: 0%, 30 nm: 29%, 50 nm: 71%, 100 nm: 100%, p < .0001, Cochran Armitage Trend Test). Sol-gel mesoporous silica particles have uniform particle sizes and well-defined pores, which is an advantage for implantation via a fine needle. Selected formulations may be used as an intraocular drug delivery system with proper loading and encapsulation.
Collapse
Affiliation(s)
- Yaoyao Sun
- Department of Ophthalmology, Jacobs Retina Center at Shiley Eye Institute, University of California, San Diego, CA, USA
| | - Kristyn Huffman
- Department of Ophthalmology, Jacobs Retina Center at Shiley Eye Institute, University of California, San Diego, CA, USA
| | - William R Freeman
- Department of Ophthalmology, Jacobs Retina Center at Shiley Eye Institute, University of California, San Diego, CA, USA
| | - Michael J Sailor
- Department of Chemistry and Biochemistry, University of California, San Diego, CA, USA
| | - Lingyun Cheng
- Department of Ophthalmology, Jacobs Retina Center at Shiley Eye Institute, University of California, San Diego, CA, USA
| |
Collapse
|
17
|
Abstract
![]()
Tyrosine hydroxylase (TH) is the
enzyme catalyzing the rate-limiting
step in the synthesis of dopamine in the brain. Developing enzyme
replacement therapies using TH could therefore be beneficial to patient
groups with dopamine deficiency, and the use of nanocarriers that
cross the blood–brain barrier seems advantageous for this purpose.
Nanocarriers may also help to maintain the structure and function
of TH, which is complex and unstable. Understanding how TH may interact
with a nanocarrier is therefore crucial for the investigation of such
therapeutic applications. This work describes the interaction of TH
with porous silicon nanoparticles (pSiNPs), chosen since they have
been shown to deliver other macromolecular therapeutics successfully
to the brain. Size distributions obtained by dynamic light scattering
show a size increase of pSiNPs upon addition of TH and the changes
observed at the surface of pSiNPs by transmission electron microscopy
also indicated TH binding at pH 7. As pSiNPs are negatively charged,
we also investigated the binding at pH 6, which makes TH less negatively
charged than at pH 7. However, as seen by thioflavin-T fluorescence,
TH aggregated at this more acidic pH. TH activity was unaffected by
the binding to pSiNPs most probably because the active site stays
available for catalysis, in agreement with calculations of the surface
electrostatic potential pointing to the most positively charged regulatory
domains in the tetramer as the interacting regions. These results
reveal pSiNPs as a promising delivery device of enzymatically active
TH to increase local dopamine synthesis.
Collapse
Affiliation(s)
- Maria T Bezem
- Department of Biomedicine, University of Bergen, Jonas Lies vei 91, Bergen 5009, Norway
| | - Fredrik G Johannessen
- Department of Biomedicine, University of Bergen, Jonas Lies vei 91, Bergen 5009, Norway
| | - Trond-André Kråkenes
- Department of Biomedicine, University of Bergen, Jonas Lies vei 91, Bergen 5009, Norway
| | - Michael J Sailor
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California 92093, United States
| | - Aurora Martinez
- Department of Biomedicine, University of Bergen, Jonas Lies vei 91, Bergen 5009, Norway
| |
Collapse
|
18
|
Wu Q, Liu C, Tang L, Yan Y, Qiu H, Pei Y, Sailor MJ, Wu L. Stable electrically conductive, highly flame-retardant foam composites generated from reduced graphene oxide and silicone resin coatings. Soft Matter 2021; 17:68-82. [PMID: 33147311 DOI: 10.1039/d0sm01540g] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
To acheive flexible polyurethane (PU) foam composites with stable electrical conductivity and high flame retardancy involved first coating of graphene oxide (GO) onto PU foam surfaces and then chemically reducing the GO with hydrazine to form reduced GO (RGO). The RGO-coated PU foam is then dipped into a solution containing silicone resin (SiR) and silica nano-particles and cured. The resulting composites (PU-RGO-SiR) show superior flame retardancy, thermal stability and mechanical stability relative to the PU starting materials or PU coated with either RGO or SiR alone. The electrical conductivity of the PU-RGO-SiR composites (as high as 118 S m-1 at room temperature) could almost be retained but with small loss of 9.5% of the original value after 150 cyclic compression. When the samples were subjected to a temperature range from -50 to 400 °C, the electrical conductivity could remain constant at -50 °C, 25 °C, 100 °C, 200 °C, and even at 300 °C and 400 °C; the electrical-conductivity exhibited mild vibration but the vibration range was not beyond 5.6%. Flame retardancy tests show that the limiting oxygen index (LOI) increases from 14.7% for the pure foam to 31.5% for PU-RGO-SiR, and the PU-RGO-SiR composites exhibit a 65% reduction in the peak heat release rate (pHRR) and a 30% reduction in total smoke release (TSR). Thus, stable electrically conductive and highly flame-retardant foam composites have potential applications even in a variety of harsh conditions like high temperature, flame, organic solvents, and external compression.
Collapse
Affiliation(s)
- Qian Wu
- Key Laboratory of Organosilicon Chemistry and Materials Technology of Ministry of Education, Hangzhou Normal University, Hangzhou, 311121, P. R. China.
| | | | | | | | | | | | | | | |
Collapse
|
19
|
Sailor MJ. Celebrating Our Editorial Advisory Board. ACS Sens 2020; 5:3652. [PMID: 33290048 DOI: 10.1021/acssensors.0c02447] [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]
|
20
|
Kang RH, Jang JE, Huh E, Kang SJ, Ahn DR, Kang JS, Sailor MJ, Yeo SG, Oh MS, Kim D, Kim HY. A brain tumor-homing tetra-peptide delivers a nano-therapeutic for more effective treatment of a mouse model of glioblastoma. Nanoscale Horiz 2020; 5:1213-1225. [PMID: 32510090 DOI: 10.1039/d0nh00077a] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Organ-specific cell-penetrating peptides (CPPs) are a class of molecules that can be highly effective at delivering therapeutic cargoes, and they are currently of great interest in cancer treatment strategies. Herein, we describe a new CPP (amino acid sequence serine-isoleucine-tyrosine-valine, or SIWV) that homes to glioblastoma multiforme (GBM) brain tumor tissues with remarkable specificity in vitro and in vivo. The SIWV sequence was identified from an isoform of annexin-A3 (AA3H), a membrane-interacting human protein. The mechanism of intracellular permeation is proposed to follow a caveolin-mediated endocytotic pathway, based on in vitro and in vivo receptor inhibition and genetic knockdown studies. Feasibility as a targeting agent for therapeutics is demonstrated in a GBM xenograft mouse model, where porous silicon nanoparticles (pSiNPs) containing the clinically relevant anticancer drug SN-38 are grafted with SIWV via a poly-(ethylene glycol) (PEG) linker. The formulation shows enhanced in vivo targeting ability relative to a formulation employing a scrambled control peptide, and significant (P < 0.05) therapeutic efficacy relative to free SN-38 in the GBM xenograft animal model.
Collapse
Affiliation(s)
- Rae Hyung Kang
- Department of Biomedical Science, Graduate School, Kyung Hee University, Seoul 02447, Republic of Korea.
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
21
|
Zuidema JM, Dumont CM, Wang J, Batchelor WM, Lu YS, Kang J, Bertucci A, Ziebarth NM, Shea LD, Sailor MJ. Porous Silicon Nanoparticles Embedded in Poly(lactic- co-glycolic acid) Nanofiber Scaffolds Deliver Neurotrophic Payloads to Enhance Neuronal Growth. Adv Funct Mater 2020; 30:2002560. [PMID: 32982626 PMCID: PMC7513949 DOI: 10.1002/adfm.202002560] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2020] [Accepted: 03/27/2020] [Indexed: 06/11/2023]
Abstract
Scaffolds made from biocompatible polymers provide physical cues to direct the extension of neurites and to encourage repair of damaged nerves. The inclusion of neurotrophic payloads in these scaffolds can substantially enhance regrowth and repair processes. However, many promising neurotrophic candidates are excluded from this approach due to incompatibilities with the polymer or with the polymer processing conditions. This work provides one solution to this problem by incorporating porous silicon nanoparticles (pSiNPs) that are pre-loaded with the therapeutic into a polymer scaffold during fabrication. The nanoparticle-drug-polymer hybrids are prepared in the form of oriented poly(lactic-co-glycolic acid) nanofiber scaffolds. We test three different therapeutic payloads: bpV(HOpic), a small molecule inhibitor of phosphatase and tensin homolog (PTEN); an RNA aptamer specific to tropomyosin-related kinase receptor type B (TrkB); and the protein nerve growth factor (NGF). Each therapeutic is loaded using a loading chemistry that is optimized to slow the rate of release of these water-soluble payloads. The drug-loaded pSiNP-nanofiber hybrids release approximately half of their TrkB aptamer, bpV(HOpic), or NGF payload in 2, 10, and >40 days, respectively. The nanofiber hybrids increase neurite extension relative to drug-free control nanofibers in a dorsal root ganglion explant assay.
Collapse
Affiliation(s)
- Jonathan M Zuidema
- Department of Chemistry and Biochemistry, University of California San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USA
| | - Courtney M Dumont
- Department of Biomedical Engineering, University of Miami, 1251 Memorial Drive, Coral Gables, FL 33146, USA
| | - Joanna Wang
- Materials Science and Engineering, University of California San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USA
| | - Wyndham M Batchelor
- Department of Biomedical Engineering, University of Miami, 1251 Memorial Drive
| | - Yi-Sheng Lu
- Materials Science and Engineering, University of California San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USA
| | - Jinyoung Kang
- Department of Nanoengineering, University of California San Diego, 9500 Gilman Drive, La Jolla, CA 92093, CA
| | - Alessandro Bertucci
- Department of Chemistry and Biochemistry, University of California San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USA
| | - Noel M Ziebarth
- Department of Biomedical Engineering, University of Miami, 1251 Memorial Drive
| | - Lonnie D Shea
- Department of Biomedical Engineering, University of Michigan, 2200 Bonisteel Boulevard, Ann Arbor, MI 48109, USA
| | - Michael J Sailor
- Department of Chemistry and Biochemistry, University of California San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USA
| |
Collapse
|
22
|
Sailor MJ. Detect to Protect. ACS Sens 2020; 5:1247-1248. [PMID: 32438814 PMCID: PMC7262728 DOI: 10.1021/acssensors.0c00920] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2020] [Indexed: 11/30/2022]
Affiliation(s)
- Michael J. Sailor
- Department of Chemistry and Biochemistry, University of California, San Diego, California, United States
| |
Collapse
|
23
|
Zuidema JM, Bertucci A, Kang J, Sailor MJ, Ricci F. Hybrid polymer/porous silicon nanofibers for loading and sustained release of synthetic DNA-based responsive devices. Nanoscale 2020; 12:2333-2339. [PMID: 31930266 DOI: 10.1039/c9nr08474f] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Synthetic DNA-based oligonucleotides are loaded into porous silicon nanoparticles (pSiNPs) and incorporated into nanofibers of poly(lactide-co-glycolide) (PLGA), poly-l-lactic acid (PLA), or polycaprolactone (PCL). The resulting hybrid nanofibers are characterized for their ability to release the functional oligonucleotide payload under physiologic conditions. Under temperature and pH conditions mimicking physiological values, the PLGA-based nanofibers release >80% of their DNA cargo within 5 days, whereas the PLA and PCL-based fibers require 15 days to release >80% of their cargo. The quantity of DNA released scales with the quantity of DNA-loaded pSiNPs embedded in the nanofibers; mass loadings of between 2.4 and 9.1% (based on mass of DNA-pSiNP construct relative to mass of polymer composite) are investigated. When a responsive DNA-based nanodevice (i.e. molecular beacon) is used as a payload, it retains its functionality during the release period, independent of the polymer used for the formation of the nanofibers.
Collapse
Affiliation(s)
- Jonathan M Zuidema
- Department of Chemistry and Biochemistry, University of California San Diego, La Jolla, CA, USA.
| | - Alessandro Bertucci
- Department of Chemistry and Biochemistry, University of California San Diego, La Jolla, CA, USA. and Department of Chemical Science and Technologies, University of Rome Tor Vergata, 00133 Rome, Italy.
| | - Jinyoung Kang
- Department of Nanoengineering, University of California San Diego, La Jolla, CA, USA
| | - Michael J Sailor
- Department of Chemistry and Biochemistry, University of California San Diego, La Jolla, CA, USA. and Department of Nanoengineering, University of California San Diego, La Jolla, CA, USA
| | - Francesco Ricci
- Department of Chemical Science and Technologies, University of Rome Tor Vergata, 00133 Rome, Italy.
| |
Collapse
|
24
|
Mariani S, Robbiano V, Iglio R, La Mattina AA, Nadimi P, Wang J, Kim B, Kumeria T, Sailor MJ, Barillaro G. Moldless Printing of Silicone Lenses With Embedded Nanostructured Optical Filters. Adv Funct Mater 2020; 30:1906836. [PMID: 32377177 PMCID: PMC7202556 DOI: 10.1002/adfm.201906836] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Optical lenses are among the oldest technological innovations (3000 years ago) and they have enabled a multitude of applications in healthcare and in our daily lives. The primary function of optical lenses has changed little over time; they serve mainly as a light-collection (e.g. reflected, transmitted, diffracted) element, and the wavelength and/or intensity of the collected light is usually manipulated by coupling with various external optical filter elements or coatings. This generally results in losses associated with multiple interfacial reflections, and increases the complexity of design and construction. In this work we introduce a change in this paradigm, by integrating both light-shaping and image magnification into a single lens element using a moldless procedure that takes advantage of the physical and optical properties of mesoporous silicon (PSi) photonic crystal nanostructures. Casting of a liquid poly(dimethyl) siloxane (PDMS) pre-polymer solution onto a PSi film generates a droplet with contact angle that is readily controlled by the silicon nanostructure, and adhesion of the cured polymer to the PSi photonic crystal allows preparation of lightweight (10 mg) freestanding lenses (4.7 mm focal length) with an embedded optical component (e.g. optical rugate filter, resonant cavity, distributed Bragg reflector). Our fabrication process shows excellent reliability (yield 95%) and low cost and we expect our lens to have implications in a wide range of applications. As a proof-of-concept, using a single monolithic lens/filter element we demonstrate: fluorescence imaging of isolated human cancer cells with rejection of the blue excitation light, through a lens that is self-adhered to a commercial smartphone; shaping the emission spectrum of a white light emitting diode (LED) to tune the color from red through blue; and selection of a narrow wavelength band (bandwidth 5 nm) from a fluorescent molecular probe.
Collapse
Affiliation(s)
- Stefano Mariani
- Department of Information Engineering, University of Pisa, Via G. Caruso 16, 56122, Italy
| | - Valentina Robbiano
- Department of Information Engineering, University of Pisa, Via G. Caruso 16, 56122, Italy
| | - Rossella Iglio
- Department of Information Engineering, University of Pisa, Via G. Caruso 16, 56122, Italy
| | - Antonino A La Mattina
- Department of Information Engineering, University of Pisa, Via G. Caruso 16, 56122, Italy
| | - Pantea Nadimi
- Department of Information Engineering, University of Pisa, Via G. Caruso 16, 56122, Italy
| | - Joanna Wang
- Materials Science and Engineering Program, University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093, United States
| | - Byungji Kim
- Materials Science and Engineering Program, University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093, United States
| | - Tushar Kumeria
- Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093, United States
| | - Michael J Sailor
- Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093, United States
| | - Giuseppe Barillaro
- Department of Information Engineering, University of Pisa, Via G. Caruso 16, 56122, Italy
| |
Collapse
|
25
|
Affiliation(s)
- Joanna Wang
- Materials Science and Engineering Program University of California at San Diego 9500 Gilman Dr., La Jolla USA
| | - Michael J. Sailor
- Department of Chemistry and Biochemistry University of California at San Diego 9500 Gilman Dr., La Jolla USA
| | - Byoung‐Yong Chang
- Department of Chemistry Pukyong National University 45 Yongso-ro, Nam-gu Busan Korea
| |
Collapse
|
26
|
Kim B, Park JH, Sailor MJ. Rekindling RNAi Therapy: Materials Design Requirements for In Vivo siRNA Delivery. Adv Mater 2019; 31:e1903637. [PMID: 31566258 PMCID: PMC6891135 DOI: 10.1002/adma.201903637] [Citation(s) in RCA: 158] [Impact Index Per Article: 31.6] [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: 06/08/2019] [Revised: 07/12/2019] [Indexed: 05/07/2023]
Abstract
With the recent FDA approval of the first siRNA-derived therapeutic, RNA interference (RNAi)-mediated gene therapy is undergoing a transition from research to the clinical space. The primary obstacle to realization of RNAi therapy has been the delivery of oligonucleotide payloads. Therefore, the main aims is to identify and describe key design features needed for nanoscale vehicles to achieve effective delivery of siRNA-mediated gene silencing agents in vivo. The problem is broken into three elements: 1) protection of siRNA from degradation and clearance; 2) selective homing to target cell types; and 3) cytoplasmic release of the siRNA payload by escaping or bypassing endocytic uptake. The in vitro and in vivo gene silencing efficiency values that have been reported in publications over the past decade are quantitatively summarized by material type (lipid, polymer, metal, mesoporous silica, and porous silicon), and the overall trends in research publication and in clinical translation are discussed to reflect on the direction of the RNAi therapeutics field.
Collapse
Affiliation(s)
- Byungji Kim
- Materials Science and Engineering Program, University of California, San Diego, 9500 Gilman Dr., La Jolla, CA, 92093, USA
| | - Ji-Ho Park
- Department of Bio and Brain Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, Republic of Korea
| | - Michael J Sailor
- Materials Science and Engineering Program, University of California, San Diego, 9500 Gilman Dr., La Jolla, CA, 92093, USA
- Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Dr., La Jolla, CA, 92093, USA
| |
Collapse
|
27
|
Abstract
Most current nanoparticle-based PET tracers are radiolabeled through metal chelators conjugated on the nanoparticle surface. Metal chelation usually requires sophisticated optimization and may impact the physical or chemical properties of nanoparticles, which leads to the changes in their distribution and pharmacokinetics in vivo. A chelator-free radiolabeling approach is thus highly desirable. Here, we report that zinc sulfide (ZnS) quantum dots (QDs) can be rapidly radiolabeled with 68Ga or 64Cu through cation exchange without chelators. The radiolabeling was accomplished in times as short as 5 min at 37 °C in aqueous solution, yielding a high labeling efficiency and radiochemical purity for both isotopes. Surface functionalization with targeting peptides was also readily achieved to enable or enhance the cellular uptake of QDs. In vivo PET imaging showed that 64Cu-labeled QDs had a much higher tumor uptake (7.3% ID g-1) than 64Cu-DOTA in a murine cancer model. Overall, this study presents a QD-based platform to achieve convenient and chelator-free radiolabeling, and improve PET imaging of solid tumors.
Collapse
Affiliation(s)
- Tang Tang
- Department of Pharmaceutics, University of Minnesota, Minneapolis, MN 55455, USA.
| | | | | | | | | | | |
Collapse
|
28
|
Kang J, Kim D, Wang J, Han Y, Zuidema JM, Hariri A, Park JH, Jokerst JV, Sailor MJ. Enhanced Performance of a Molecular Photoacoustic Imaging Agent by Encapsulation in Mesoporous Silicon Nanoparticles. Adv Mater 2019; 31:e1905454. [PMID: 31595594 DOI: 10.1002/adma.201905454] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
|
29
|
Kim B, Sun S, Varner JA, Howell SB, Ruoslahti E, Sailor MJ. Securing the Payload, Finding the Cell, and Avoiding the Endosome: Peptide-Targeted, Fusogenic Porous Silicon Nanoparticles for Delivery of siRNA. Adv Mater 2019; 31:e1902952. [PMID: 31267590 PMCID: PMC6710136 DOI: 10.1002/adma.201902952] [Citation(s) in RCA: 60] [Impact Index Per Article: 12.0] [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: 05/08/2019] [Revised: 06/08/2019] [Indexed: 05/06/2023]
Abstract
Despite the promise of ribonucleic acid interference therapeutics, the delivery of oligonucleotides selectively to diseased tissues in the body, and specifically to the cellular location in the tissues needed to provide optimal therapeutic outcome, remains a significant challenge. Here, key material properties and biological mechanisms for delivery of short interfering RNAs (siRNAs) to effectively silence target-specific cells in vivo are identified. Using porous silicon nanoparticles as the siRNA host, tumor-targeting peptides for selective tissue homing, and fusogenic lipid coatings to induce fusion with the plasma membrane, it is shown that the uptake mechanism can be engineered to be independent of common receptor-mediated endocytosis pathways. Two examples of the potential broad clinical applicability of this concept in a mouse xenograft model of ovarian cancer peritoneal carcinomatosis are provided: silencing the Rev3l subunit of polymerase Pol ζ to impair DNA repair in combination with cisplatin; and reprogramming tumor-associated macrophages into a proinflammatory state.
Collapse
Affiliation(s)
- Byungji Kim
- Materials Science and Engineering Program, University of California, San Diego, 9500 Gilman Dr., La Jolla, CA, 92093, USA
| | - Si Sun
- Department of Obstetrics and Gynecology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China
| | - Judith A Varner
- Moores Cancer Center and Department of Pathology, University of California, San Diego, La Jolla, CA, 92037, USA
| | - Stephen B Howell
- Moores Cancer Center and Department of Medicine, University of California, San Diego, La Jolla, CA, 92037, USA
| | - Erkki Ruoslahti
- Cancer Research Center, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA, 92037, USA
| | - Michael J Sailor
- Materials Science and Engineering Program, University of California, San Diego, 9500 Gilman Dr., La Jolla, CA, 92093, USA
- Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Dr., La Jolla, CA, 92093, USA
| |
Collapse
|
30
|
Pérez KS, Warther D, Calixto ME, Méndez-Blas A, Sailor MJ. Harnessing the Aqueous Chemistry of Silicon: Self-Assembling Porous Silicon/Silica Microribbons. ACS Appl Mater Interfaces 2019; 11:27162-27169. [PMID: 31310495 DOI: 10.1021/acsami.9b03611] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The synthesis of microribbons based on the assembly of porous silicon nanoparticles (pSiNPs) in a silica matrix is reported. The formation of these structures is driven by dissolution and reprecipitation of silica derived from the NPs upon drying of an aqueous colloidal dispersion. The process generates composite films that fracture into filaments due to geometric stresses associated with drying of the film on a curved surface. By controlling NP concentration, solvent, and temperature during the evaporation process, well-defined microribbons with a rectangular cross section of ∼25 × 100 microns and lengths on the order of 1 cm are formed. Partial thermal oxidation of the ribbons generates luminescent Si-SiO2 core-shell composites, and complete oxidation generates porous SiO2 ribbons with retention of the mesoporous nanostructure. The pores can be infiltrated with daunorubicin as a model drug, and the resulting material shows sustained release of the chemotherapeutic for more than 70 days.
Collapse
Affiliation(s)
- Karina S Pérez
- Department of Chemistry and Biochemistry , University of California San Diego , La Jolla , California 92093 , United States
| | - David Warther
- Department of Chemistry and Biochemistry , University of California San Diego , La Jolla , California 92093 , United States
| | - Ma Estela Calixto
- Instituto de Física , Benemérita Universidad Autónoma de Puebla , A. P. J48, 72570 Puebla , México
| | - Antonio Méndez-Blas
- Instituto de Física , Benemérita Universidad Autónoma de Puebla , A. P. J48, 72570 Puebla , México
| | - Michael J Sailor
- Department of Chemistry and Biochemistry , University of California San Diego , La Jolla , California 92093 , United States
| |
Collapse
|
31
|
Hollett G, Roberts DS, Sewell M, Wensley E, Wagner J, Murray W, Krotz A, Toth B, Vijayakumar V, Sailor MJ. Quantum Ensembles of Silicon Nanoparticles: Discrimination of Static and Dynamic Photoluminescence Quenching Processes. J Phys Chem C Nanomater Interfaces 2019; 123:17976-17986. [PMID: 32489514 PMCID: PMC7266134 DOI: 10.1021/acs.jpcc.9b04334] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Porous silicon photoluminescence is characterized by a broad emission band that displays unusually long (tens to hundreds of micro-seconds), wavelength-dependent emissive lifetimes. The photoluminescence is associated with quantum confinement of excitons in silicon nanocrystallites contained within the porous matrix, and the broad emission spectrum derives from the wide distribution of nanocrystallite sizes in the material. The longer emissive lifetimes in the ensemble of quantum-confined emitters correspond to the larger nanocrystallites, with their longer wavelengths of emission. The quenching of this photoluminescence by aromatic, redox-active molecules aminochrome (AMC), dopamine, adrenochrome, sodium anthraquinone-2-sulfonate, benzyl viologen dichloride, methyl viologen dichloride hydrate, and ethyl viologen dibromide is studied, and dynamic and static quenching mechanisms are distinguished by the emission lifetime analysis. Because of the dependence of the emission lifetime on emission wavelength from the silicon nanocrystallite ensemble, a pronounced blue shift is observed in the steady-state emission spectrum upon exposure to dynamic-type quenchers. Conversely, static-type quenching systems show uniform quenching across all emission wavelengths. Thus, the difference between static and dynamic quenching mechanisms is readily distinguished by ratiometric photoluminescence spectroscopy. The application of this concept to imaging of AMC, the oxidized form of the neurotransmitter dopamine that is of interest for its role in neurodegenerative diseases, is demonstrated. It is found that static electron acceptors result in no ratiometric contrast, while AMC shows a strong contrast, allowing ready visualization in a 2-D imaging experiment.
Collapse
Affiliation(s)
- Geoffrey Hollett
- Materials Science and Engineering, University of California San Diego, La Jolla, California 92093, United States
| | - David S. Roberts
- Chemistry and Biochemistry, University of California San Diego, La Jolla, California 92093, United States
| | - Mollie Sewell
- Bioengineering, North Carolina A&T State University, Greensboro, North Carolina 27412, United States
| | - Emma Wensley
- Chemistry and Biochemistry, University of California San Diego, La Jolla, California 92093, United States
| | - Julia Wagner
- Chemistry and Biochemistry, University of California San Diego, La Jolla, California 92093, United States
| | - William Murray
- Chemistry and Biochemistry, University of California San Diego, La Jolla, California 92093, United States
| | - Alex Krotz
- Chemistry and Biochemistry, University of California San Diego, La Jolla, California 92093, United States
| | - Bryan Toth
- Chemistry and Biochemistry, University of California San Diego, La Jolla, California 92093, United States
| | - Vibha Vijayakumar
- Chemistry and Biochemistry, University of California San Diego, La Jolla, California 92093, United States
| | - Michael J. Sailor
- Chemistry and Biochemistry, University of California San Diego, La Jolla, California 92093, United States
| |
Collapse
|
32
|
Bertucci A, Kim KH, Kang J, Zuidema JM, Lee SH, Kwon EJ, Kim D, Howell SB, Ricci F, Ruoslahti E, Jang HJ, Sailor MJ. Tumor-Targeting, MicroRNA-Silencing Porous Silicon Nanoparticles for Ovarian Cancer Therapy. ACS Appl Mater Interfaces 2019; 11:23926-23937. [PMID: 31251556 DOI: 10.1021/acsami.9b07980] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [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: 06/09/2023]
Abstract
Silencing of aberrantly expressed microRNAs (miRNAs or miRs) has emerged as one of the strategies for molecular targeted cancer therapeutics. In particular, miR-21 is an oncogenic miRNA overexpressed in many tumors, including ovarian cancer. To achieve efficient administration of anti-miR therapeutics, delivery systems are needed that can ensure local accumulation in the tumor environment, low systemic toxicity, and reduced adverse side effects. In order to develop an improved anti-miR therapeutic agent for the treatment of ovarian cancer, a nanoformulation is engineered that leverages biodegradable porous silicon nanoparticles (pSiNPs) encapsulating an anti-miR-21 locked nucleic acid payload and displaying a tumor-homing peptide for targeted distribution. Targeting efficacy, miR-21 silencing, and anticancer activity are optimized in vitro on a panel of ovarian cancer cell lines, and a formulation of anti-miR-21 in a pSiNP displaying the targeting peptide CGKRK is identified for in vivo evaluation. When this nanoparticulate agent is delivered to mice bearing tumor xenografts, a substantial inhibition of tumor growth is achieved through silencing of miR-21. This study presents the first successful application of tumor-targeted anti-miR porous silicon nanoparticles for the treatment of ovarian cancer in a mouse xenograft model.
Collapse
Affiliation(s)
- Alessandro Bertucci
- Department of Chemical Sciences and Technologies , University of Rome Tor Vergata , Rome , 00133 , Italy
| | | | | | | | | | | | | | | | - Francesco Ricci
- Department of Chemical Sciences and Technologies , University of Rome Tor Vergata , Rome , 00133 , Italy
| | - Erkki Ruoslahti
- Cancer Center , Sanford Burnham Prebys Medical Discovery Institute , La Jolla , California 92037 , United States
| | | | | |
Collapse
|
33
|
Kim B, Sailor MJ. Synthesis, Functionalization, and Characterization of Fusogenic Porous Silicon Nanoparticles for Oligonucleotide Delivery. J Vis Exp 2019. [PMID: 31058889 DOI: 10.3791/59440] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
With the advent of gene therapy, the development of an effective in vivo nucleotide-payload delivery system has become of parallel import. Fusogenic porous silicon nanoparticles (F-pSiNPs) have recently demonstrated high in vivo gene silencing efficacy due to its high oligonucleotide loading capacity and unique cellular uptake pathway that avoids endocytosis. The synthesis of F-pSiNPs is a multi-step process that includes: (1) loading and sealing of oligonucleotide payloads in the silicon pores; (2) simultaneous coating and sizing of fusogenic lipids around the porous silicon cores; and (3) conjugation of targeting peptides and washing to remove excess oligonucleotide, silicon debris, and peptide. The particle's size uniformity is characterized by dynamic light scattering, and its core-shell structure may be verified by transmission electron microscopy. The fusogenic uptake is validated by loading a lipophilic dye, 1,1'-dioctadecyl-3,3,3',3'-tetramethylindocarbocyanine perchlorate (DiI), into the fusogenic lipid bilayer and treating it to cells in vitro to observe for plasma membrane staining versus endocytic localizations. The targeting and in vivo gene silencing efficacies were previously quantified in a mouse model of Staphylococcus aureus pneumonia, in which the targeting peptide is expected to help the F-pSiNPs to home to the site of infection. Beyond its application in S. aureus infection, the F-pSiNP system may be used to deliver any oligonucleotide for gene therapy of a wide range of diseases, including viral infections, cancer, and autoimmune diseases.
Collapse
Affiliation(s)
- Byungji Kim
- Materials Science and Engineering Program, University of California, San Diego;
| | - Michael J Sailor
- Materials Science and Engineering Program, University of California, San Diego; Department of Chemistry and Biochemistry, University of California, San Diego
| |
Collapse
|
34
|
Gongalsky MB, Kargina JV, Cruz JF, Sánchez-Royo JF, Chirvony VS, Osminkina LA, Sailor MJ. Formation of Si/SiO 2 Luminescent Quantum Dots From Mesoporous Silicon by Sodium Tetraborate/Citric Acid Oxidation Treatment. Front Chem 2019; 7:165. [PMID: 30984738 PMCID: PMC6450366 DOI: 10.3389/fchem.2019.00165] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [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: 10/18/2018] [Accepted: 03/04/2019] [Indexed: 11/13/2022] Open
Abstract
We propose a rapid, one-pot method to generate photoluminescent (PL) mesoporous silicon nanoparticles (PSiNPs). Typically, mesoporous silicon (meso-PSi) films, obtained by electrochemical etching of monocrystalline silicon substrates, do not display strong PL because the silicon nanocrystals (nc-Si) in the skeleton are generally too large to display quantum confinement effects. Here we describe an improved approach to form photoluminescent PSiNPs from meso-PSi by partial oxidation in aqueous sodium borate (borax) solutions. The borax solution acts to simultaneously oxidize the nc-Si surface and to partially dissolve the oxide product. This results in reduction of the size of the nc-Si core into the quantum confinement regime, and formation of an insulating silicon dioxide (SiO2) shell. The shell serves to passivate the surface of the silicon nanocrystals more effectively localizing excitons and increasing PL intensity. We show that the oxidation/dissolution process can be terminated by addition of excess citric acid, which changes the pH of the solution from alkaline to acidic. The process is monitored in situ by measurement of the steady-state PL spectrum from the PSiNPs. The measured PL intensity increases by 1.5- to 2-fold upon addition of citric acid, which we attribute to passivation of non-radiative recombination centers in the oxide shell. The measured PL quantum yield of the final product is up to 20%, the PL activation procedure takes <20 min, and the resulting material remains stable in aqueous dispersion for at least 1 day. The proposed phenomenological model explaining the process takes into account both pH changes in the solution and the potential increase in solubility of silicic acid due to interaction with sodium cations.
Collapse
Affiliation(s)
- Maxim B Gongalsky
- Faculty of Physics, Lomonosov Moscow State University, Moscow, Russia.,Department of Chemistry and Biochemistry, University of California, San Diego, San Diego, CA, United States
| | - Julia V Kargina
- Faculty of Physics, Lomonosov Moscow State University, Moscow, Russia
| | - Jose F Cruz
- Department of Chemistry and Biochemistry, University of California, San Diego, San Diego, CA, United States
| | | | | | - Liubov A Osminkina
- Faculty of Physics, Lomonosov Moscow State University, Moscow, Russia.,Institute for Biological Instrumentation of Russian Academy of Sciences, Moscow, Russia
| | - Michael J Sailor
- Department of Chemistry and Biochemistry, University of California, San Diego, San Diego, CA, United States
| |
Collapse
|
35
|
Tang T, Wei Y, Kang J, She ZG, Kim D, Sailor MJ, Ruoslahti E, Pang HB. Tumor-specific macrophage targeting through recognition of retinoid X receptor beta. J Control Release 2019; 301:42-53. [PMID: 30871996 DOI: 10.1016/j.jconrel.2019.03.009] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [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: 11/26/2018] [Revised: 03/01/2019] [Accepted: 03/08/2019] [Indexed: 12/11/2022]
Abstract
Macrophages play important and diverse roles during cancer progression. However, cancer therapies based on macrophage modulation are lacking in tools that can recognize and deliver therapeutic payloads to macrophages in a tumor-specific manner. As a result, treatments tend to interfere with normal macrophage functions in healthy organs. We previously identified a macrophage-binding peptide, termed CRV. Here, we show that upon systemic administration into tumor-bearing mice, CRV selectively homes to tumors, extravasates, and preferentially binds to macrophages within. CRV exhibits a higher affinity for tumor macrophages than for other cells in tumors or for other macrophage types elsewhere in the body. We further identified and validated retinoid X receptor beta (RXRB) as the CRV receptor. Intriguingly, although it is known as a nuclear receptor, RXRB shows a prominent cell surface localization that is largely restricted to tumor macrophages. Systemic administration of anti-RXRB antibodies also results in tumor-selective binding to macrophages similar to CRV. Lastly, we demonstrate the ability of CRV to improve the delivery of nano-carriers into solid tumors and macrophages within. In summary, we describe here a novel cell surface marker and targeting tools for tumor macrophages that may aid in future development of macrophage-modulatory cancer therapies.
Collapse
Affiliation(s)
- Tang Tang
- Department of Pharmaceutics, University of Minnesota, Minneapolis, MN 55455, USA; Cancer Center, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA 92037, USA
| | - Yushuang Wei
- Department of Pharmaceutics, University of Minnesota, Minneapolis, MN 55455, USA; Cancer Center, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA 92037, USA
| | - Jinyoung Kang
- Department of Nanoengineering, University of California, San Diego, La Jolla, CA 92093, USA
| | - Zhi-Gang She
- Department of Cardiology, Renmin Hospital, Wuhan University, Wuhan, Hubei, China
| | - Dokyoung Kim
- Department of Anatomy and Neurobiology, College of Medicine, Kyung Hee University, Seoul 02447, Republic of Korea
| | - Michael J Sailor
- Department of Nanoengineering, University of California, San Diego, La Jolla, CA 92093, USA; Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, CA 92093, USA
| | - Erkki Ruoslahti
- Cancer Center, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA 92037, USA
| | - Hong-Bo Pang
- Department of Pharmaceutics, University of Minnesota, Minneapolis, MN 55455, USA; Cancer Center, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA 92037, USA.
| |
Collapse
|
36
|
Sailor MJ. Helping Horton Hear His Whos. ACS Sens 2019; 4:265-266. [PMID: 30791689 DOI: 10.1021/acssensors.9b00255] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Michael J Sailor
- University of California , San Diego , California , United States
| |
Collapse
|
37
|
Jin Y, Kim D, Roh H, Kim S, Hussain S, Kang J, Pack CG, Kim JK, Myung SJ, Ruoslahti E, Sailor MJ, Kim SC, Joo J. Tracking the Fate of Porous Silicon Nanoparticles Delivering a Peptide Payload by Intrinsic Photoluminescence Lifetime. Adv Mater 2018; 30:e1802878. [PMID: 30003620 PMCID: PMC6177232 DOI: 10.1002/adma.201802878] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [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: 05/04/2018] [Revised: 06/13/2018] [Indexed: 05/19/2023]
Abstract
A nanoparticle system for systemic delivery of therapeutics is described, which incorporates a means of tracking the fate of the nanocarrier and its residual drug payload in vivo by photoluminescence (PL). Porous silicon nanoparticles (PSiNPs) containing the proapoptotic antimicrobial peptide payload, D [KLAKLAK]2 , are monitored by measurement of the intrinsic PL intensity and the PL lifetime of the nanoparticles. The PL lifetime of the PSiNPs is on the order of microseconds, substantially longer than the nanosecond lifetimes typically exhibited by conventional fluorescent tags or by autofluorescence from cells and tissues; thus, emission from the nanoparticles is readily discerned in the time-resolved PL spectrum. It is found that the luminescence lifetime of the PSiNP host decreases as the nanoparticle dissolves in phosphate-buffered saline solution (37 °C), and this correlates with the extent of release of the peptide payload. The time-resolved PL measurement allows tracking of the in vivo fate of PSiNPs injected (via tail vein) into mice. Clearance of the nanoparticles through the liver, kidneys, and lungs of the animals is observed. The luminescence lifetime of the PSiNPs decreases with increasing residence time in the mice, providing a measure of half-life for degradation of the drug nanocarriers.
Collapse
Affiliation(s)
- Yusung Jin
- Biomedical Engineering Research Center, Asan Institute for Life Sciences, Asan Medical Center, Seoul 05505, Rep. of Korea
- Department of Convergence Medicine, Asan Medical Center and University of Ulsan College of Medicine, Seoul 05505, Rep. of Korea
| | - Dokyoung Kim
- Department of Anatomy and Neurobiology, College of Medicine, and Biomedical Science Institute, Kyung Hee University, Seoul 02447, Rep. of Korea
| | - Hajung Roh
- Biomedical Engineering Research Center, Asan Institute for Life Sciences, Asan Medical Center, Seoul 05505, Rep. of Korea
- Department of Chemical Engineering, Pohang University of Science and Technology, Pohang 37673, Rep. of Korea
| | - Sojeong Kim
- Biomedical Engineering Research Center, Asan Institute for Life Sciences, Asan Medical Center, Seoul 05505, Rep. of Korea
- Department of Chemistry, Pohang University of Science and Technology, Pohang 37673, Rep. of Korea
| | - Sazid Hussain
- Cancer Research Center, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA 92037, USA
| | - Jinyoung Kang
- Department of Nanoengineering, University of California, San Diego, La Jolla, CA 92037, USA
| | - Chan-Gi Pack
- Department of Convergence Medicine, Asan Medical Center and University of Ulsan College of Medicine, Seoul 05505, Rep. of Korea
| | - Jun Ki Kim
- Biomedical Engineering Research Center, Asan Institute for Life Sciences, Asan Medical Center, Seoul 05505, Rep. of Korea
- Department of Convergence Medicine, Asan Medical Center and University of Ulsan College of Medicine, Seoul 05505, Rep. of Korea
| | - Seung-Jae Myung
- Department of Gastroenterology, University of Ulsan College of Medicine, Asan Medical Center, Seoul 05505, Rep. of Korea
| | - Erkki Ruoslahti
- Cancer Research Center, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA 92037, USA and Center for Nanomedicine, and Department of Cell, Molecular and Developmental Biology, University of California, Santa Barbara, CA 93106, USA
| | - Michael J. Sailor
- Department of Nanoengineering, University of California, San Diego, La Jolla, CA 92037, USA
| | - Song Cheol Kim
- Biomedical Engineering Research Center, Asan Institute for Life Sciences, Asan Medical Center, Seoul 05505, Rep. of Korea
- Department of Surgery, University of Ulsan College of Medicine, Asan Medical Center, Seoul 05505, Rep. of Korea
| | - Jinmyoung Joo
- Biomedical Engineering Research Center, Asan Institute for Life Sciences, Asan Medical Center, Seoul 05505, Rep. of Korea
- Department of Convergence Medicine, Asan Medical Center and University of Ulsan College of Medicine, Seoul 05505, Rep. of Korea
| |
Collapse
|
38
|
Kang J, Wang J, Hariri A, Kim D, Han Y, Park JH, Zuidema JM, Jokerst JV, Sailor MJ. Enhanced Performance of a Molecular Photoacoustic Imaging Agent by Encapsulation in Mesoporous Silicon Nanoparticles. Adv Mater 2018; 30:e1800512. [PMID: 29782671 PMCID: PMC6309700 DOI: 10.1002/adma.201800512] [Citation(s) in RCA: 70] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2018] [Revised: 03/20/2018] [Indexed: 05/22/2023]
Abstract
Photoacoustic (PA) imaging allows visualization of the physiology and pathology of tissues with good spatial resolution and relatively deep tissue penetration. The method converts near-infrared (NIR) laser excitation into thermal expansion, generating pressure transients that are detected with an acoustic transducer. Here, we find that the response of the PA contrast agent indocyanine green (ICG) can be enhanced 17-fold when it is sealed within a rigid nanoparticle. ICG encapsulated in particles composed of porous silicon (pSiNP), porous silica, or calcium silicate all show greater PA contrast relative to equivalent quantities of free ICG, with the pSiNPs showing the strongest enhancement. A liposomal formulation of ICG performs similar to free ICG, suggesting that a rigid host nanostructure is necessary to enhance ICG performance. The improved response of the nanoparticle formulations is attributed to the low thermal conductivity of the porous inorganic hosts and their ability to protect the ICG payload from photolytic and/or thermal degradation. The translational potential of ICG-loaded pSiNPs as photoacoustic probes is demonstrated via imaging of a whole mouse brain.
Collapse
Affiliation(s)
- Jinyoung Kang
- Department of Nanoengineering, University of California San Diego, 9500 Gilman Drive, La Jolla, California, 92093, USA
| | - Junxin Wang
- Department of Nanoengineering, University of California San Diego, 9500 Gilman Drive, La Jolla, California, 92093, USA
| | - Ali Hariri
- Department of Nanoengineering, University of California San Diego, 9500 Gilman Drive, La Jolla, California, 92093, USA
| | - Dokyoung Kim
- Department of Anatomy and Neurobiology, College of Medicine, Center for Converging Humanities, Kyung Hee University, 26 Kyungheedae-Ro, Dongdaemun-Gu, Seoul 02447, Republic of Korea
| | - Yunho Han
- Department of Bio and Brain Engineering & KAIST Institute for Health Science and Technology, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea
| | - Ji-Ho Park
- Department of Bio and Brain Engineering & KAIST Institute for Health Science and Technology, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea
| | - Jonathan M. Zuidema
- Department of Chemistry and Biochemistry, University of California San Diego, 9500 Gilman Drive, La Jolla, California, 92093, USA
| | - Jesse V. Jokerst
- Department of Nanoengineering, Materials Science and Engineering Program, University of California San Diego, 9500 Gilman Drive, La Jolla, California, 92093, USA
| | - Michael J. Sailor
- Department of Chemistry and Biochemistry, Department of Nanoengineering, Department of Bioengineering, Materials Science and Engineering Program, University of California San Diego, La Jolla, California, 92093, USA,
| |
Collapse
|
39
|
Kim B, Pang HB, Kang J, Park JH, Ruoslahti E, Sailor MJ. Immunogene therapy with fusogenic nanoparticles modulates macrophage response to Staphylococcus aureus. Nat Commun 2018; 9:1969. [PMID: 29773788 PMCID: PMC5958120 DOI: 10.1038/s41467-018-04390-7] [Citation(s) in RCA: 105] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2017] [Accepted: 04/25/2018] [Indexed: 01/06/2023] Open
Abstract
The incidence of adverse effects and pathogen resistance encountered with small molecule antibiotics is increasing. As such, there is mounting focus on immunogene therapy to augment the immune system’s response to infection and accelerate healing. A major obstacle to in vivo gene delivery is that the primary uptake pathway, cellular endocytosis, results in extracellular excretion and lysosomal degradation of genetic material. Here we show a nanosystem that bypasses endocytosis and achieves potent gene knockdown efficacy. Porous silicon nanoparticles containing an outer sheath of homing peptides and fusogenic liposome selectively target macrophages and directly introduce an oligonucleotide payload into the cytosol. Highly effective knockdown of the proinflammatory macrophage marker IRF5 enhances the clearance capability of macrophages and improves survival in a mouse model of Staphyloccocus aureus pneumonia. In the context of increasing bacterial antibiotic-resistance, gene therapy that targets the immune system to clear infection is a major goal. Here the authors show a silicon based nanosystem that modulates the macrophage response in an in vivo model of Staphylococcal pneumonia.
Collapse
Affiliation(s)
- Byungji Kim
- Materials Science and Engineering Program, University of California, San Diego, 9500 Gilman Drive, La Jolla, California, 92093, USA
| | - Hong-Bo Pang
- Cancer Research Center, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, California, 92037, USA.,Department of Pharmaceutics, University of Minnesota, Minneapolis, Minnesota, 55455, USA
| | - Jinyoung Kang
- Department of Nanoengineering, University of California, San Diego, 9500 Gilman Drive, La Jolla, California, 92093, USA
| | - Ji-Ho Park
- Department of Bio and Brain Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, Republic of Korea
| | - Erkki Ruoslahti
- Cancer Research Center, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, California, 92037, USA.,Center for Nanomedicine and Department of Cell, Molecular and Developmental Biology, University of California, Santa Barbara, Santa Barbara, California, 93106-9610, USA
| | - Michael J Sailor
- Materials Science and Engineering Program, University of California, San Diego, 9500 Gilman Drive, La Jolla, California, 92093, USA. .,Department of Nanoengineering, University of California, San Diego, 9500 Gilman Drive, La Jolla, California, 92093, USA. .,Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Drive, La Jolla, California, 92093, USA.
| |
Collapse
|
40
|
Lei Y, Chen Y, Gu Y, Wang C, Huang Z, Qian H, Nie J, Hollett G, Choi W, Yu Y, Kim N, Wang C, Zhang T, Hu H, Zhang Y, Li X, Li Y, Shi W, Liu Z, Sailor MJ, Dong L, Lo YH, Luo J, Xu S. Controlled Homoepitaxial Growth of Hybrid Perovskites. Adv Mater 2018; 30:e1705992. [PMID: 29611280 DOI: 10.1002/adma.201705992] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2017] [Revised: 12/08/2017] [Indexed: 06/08/2023]
Abstract
Organic-inorganic hybrid perovskites have demonstrated tremendous potential for the next-generation electronic and optoelectronic devices due to their remarkable carrier dynamics. Current studies are focusing on polycrystals, since controlled growth of device compatible single crystals is extremely challenging. Here, the first chemical epitaxial growth of single crystal CH3 NH3 PbBr3 with controlled locations, morphologies, and orientations, using combined strategies of advanced microfabrication, homoepitaxy, and low temperature solution method is reported. The growth is found to follow a layer-by-layer model. A light emitting diode array, with each CH3 NH3 PbBr3 crystal as a single pixel, with enhanced quantum efficiencies than its polycrystalline counterparts is demonstrated.
Collapse
Affiliation(s)
- Yusheng Lei
- Department of Nanoengineering, University of California San Diego, La Jolla, CA, 92093, USA
| | - Yimu Chen
- Department of Nanoengineering, University of California San Diego, La Jolla, CA, 92093, USA
| | - Yue Gu
- Materials Science and Engineering Program, University of California San Diego, La Jolla, CA, 92093, USA
| | - Chunfeng Wang
- Department of Nanoengineering, University of California San Diego, La Jolla, CA, 92093, USA
- The Key Laboratory of Materials Processing and Mold of Ministry of Education, School of Materials Science and Engineering, Zhengzhou University, Zhengzhou, Henan, 450001, P. R. China
| | - Zhenlong Huang
- Department of Nanoengineering, University of California San Diego, La Jolla, CA, 92093, USA
- School of Microelectronics and Solid State Electronics, University of Electronic Science and Technology of China, Chengdu, Sichuan, 611731, P. R. China
| | - Haoliang Qian
- Department of Electrical and Computer Engineering, University of California San Diego, La Jolla, CA, 92093, USA
| | - Jiuyuan Nie
- Materials Science and Engineering Program, University of California San Diego, La Jolla, CA, 92093, USA
| | - Geoff Hollett
- Materials Science and Engineering Program, University of California San Diego, La Jolla, CA, 92093, USA
| | - Woojin Choi
- Department of Electrical and Computer Engineering, University of California San Diego, La Jolla, CA, 92093, USA
| | - Yugang Yu
- Materials Science and Engineering Program, University of California San Diego, La Jolla, CA, 92093, USA
| | - NamHeon Kim
- Department of Nanoengineering, University of California San Diego, La Jolla, CA, 92093, USA
| | - Chonghe Wang
- Department of Nanoengineering, University of California San Diego, La Jolla, CA, 92093, USA
| | - Tianjiao Zhang
- Materials Science and Engineering Program, University of California San Diego, La Jolla, CA, 92093, USA
| | - Hongjie Hu
- Materials Science and Engineering Program, University of California San Diego, La Jolla, CA, 92093, USA
| | - Yunxi Zhang
- Department of Nanoengineering, University of California San Diego, La Jolla, CA, 92093, USA
| | - Xiaoshi Li
- Materials Science and Engineering Program, University of California San Diego, La Jolla, CA, 92093, USA
| | - Yang Li
- Department of Nanoengineering, University of California San Diego, La Jolla, CA, 92093, USA
| | - Wanjun Shi
- Zhejiang Research Institute of Chemical Industry, Hangzhou, Zhejiang, 310023, P. R. China
| | - Zhaowei Liu
- Materials Science and Engineering Program, University of California San Diego, La Jolla, CA, 92093, USA
- Department of Electrical and Computer Engineering, University of California San Diego, La Jolla, CA, 92093, USA
| | - Michael J Sailor
- Materials Science and Engineering Program, University of California San Diego, La Jolla, CA, 92093, USA
- Department of Chemistry and Biochemistry, University of California San Diego, La Jolla, CA, 92093, USA
| | - Lin Dong
- The Key Laboratory of Materials Processing and Mold of Ministry of Education, School of Materials Science and Engineering, Zhengzhou University, Zhengzhou, Henan, 450001, P. R. China
| | - Yu-Hwa Lo
- Materials Science and Engineering Program, University of California San Diego, La Jolla, CA, 92093, USA
- Department of Electrical and Computer Engineering, University of California San Diego, La Jolla, CA, 92093, USA
| | - Jian Luo
- Department of Nanoengineering, University of California San Diego, La Jolla, CA, 92093, USA
- Materials Science and Engineering Program, University of California San Diego, La Jolla, CA, 92093, USA
| | - Sheng Xu
- Department of Nanoengineering, University of California San Diego, La Jolla, CA, 92093, USA
- Materials Science and Engineering Program, University of California San Diego, La Jolla, CA, 92093, USA
| |
Collapse
|
41
|
Zuidema JM, Kumeria T, Kim D, Kang J, Wang J, Hollett G, Zhang X, Roberts DS, Chan N, Dowling C, Blanco-Suarez E, Allen NJ, Tuszynski MH, Sailor MJ. Oriented Nanofibrous Polymer Scaffolds Containing Protein-Loaded Porous Silicon Generated by Spray Nebulization. Adv Mater 2018; 30:e1706785. [PMID: 29363828 PMCID: PMC6475500 DOI: 10.1002/adma.201706785] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [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: 11/20/2017] [Revised: 12/13/2017] [Indexed: 06/07/2023]
Abstract
Oriented composite nanofibers consisting of porous silicon nanoparticles (pSiNPs) embedded in a polycaprolactone or poly(lactide-co-glycolide) matrix are prepared by spray nebulization from chloroform solutions using an airbrush. The nanofibers can be oriented by an appropriate positioning of the airbrush nozzle, and they can direct growth of neurites from rat dorsal root ganglion neurons. When loaded with the model protein lysozyme, the pSiNPs allow the generation of nanofiber scaffolds that carry and deliver the protein under physiologic conditions (phosphate-buffered saline (PBS), at 37 °C) for up to 60 d, retaining 75% of the enzymatic activity over this time period. The mass loading of protein in the pSiNPs is 36%, and in the resulting polymer/pSiNP scaffolds it is 3.6%. The use of pSiNPs that display intrinsic photoluminescence (from the quantum-confined Si nanostructure) allows the polymer/pSiNP composites to be definitively identified and tracked by time-gated photoluminescence imaging. The remarkable ability of the pSiNPs to protect the protein payload from denaturation, both during processing and for the duration of the long-term aqueous release study, establishes a model for the generation of biodegradable nanofiber scaffolds that can load and deliver sensitive biologics.
Collapse
Affiliation(s)
| | | | - Dokyoung Kim
- Department of Anatomy and Neurobiology, College of Medicine, Kyung Hee University, 26 Kyungheedae-Ro, Dongdaemun-Gu, Seoul 02447, Republic of Korea
| | - Jinyoung Kang
- Department of Nanoengineering, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093 (USA)
| | - Joanna Wang
- Materials Science and Engineering, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA, 92093 (USA)
| | - Geoffrey Hollett
- Materials Science and Engineering, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA, 92093 (USA)
| | - Xuan Zhang
- Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA, 92093 (USA)
| | - David S. Roberts
- Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA, 92093 (USA)
| | - Nicole Chan
- Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA, 92093 (USA)
| | - Cari Dowling
- Molecular Neurobiology Laboratory, Salk Institute for Biological Studies, 10010 N Torrey Pines, La Jolla, CA, 92037 (USA)
| | - Elena Blanco-Suarez
- Molecular Neurobiology Laboratory, Salk Institute for Biological Studies, 10010 N Torrey Pines, La Jolla, CA, 92037 (USA)
| | - Nicola J. Allen
- Molecular Neurobiology Laboratory, Salk Institute for Biological Studies, 10010 N Torrey Pines, La Jolla, CA, 92037 (USA)
| | - Mark H. Tuszynski
- Veterans Administration Medical Center, 3350 La Jolla Village Drive, San Diego, CA, 92161 (USA), Department of Neurosciences, University of California, San Diego, 9500 Gilman, La Jolla, CA 92093 (USA)
| | - Michael J. Sailor
- Department of Chemistry and BiochemistryUniversity of California, San Diego, 9500 Gilman Drive, La Jolla, CA, 92093 (USA)
| |
Collapse
|
42
|
|
43
|
Wang J, Kumeria T, Bezem MT, Wang J, Sailor MJ. Self-Reporting Photoluminescent Porous Silicon Microparticles for Drug Delivery. ACS Appl Mater Interfaces 2018; 10:3200-3209. [PMID: 29278488 PMCID: PMC5951298 DOI: 10.1021/acsami.7b09071] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [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] [Indexed: 05/08/2023]
Abstract
A porous Si (pSi) microparticle-based delivery system is investigated, and the intrinsic luminescence from the particles is employed as a probe to monitor the release of a model protein payload, bovine serum albumin (BSA). The microparticles consist of a core Si skeleton surrounded by a SiO2 shell. Two types of pSi are tested, one with smaller (10 nm) pores and the other with larger (20 nm) pores. The larger pore material yields a higher mass loading of BSA (3 vs 20%). Two different methods are used to load BSA into these nanostructures: the first involves loading by electrostatic physisorption, and the second involves trapping of BSA in the pSi matrix by local precipitation of magnesium silicate. Protein release from the former system is characterized by a burst release, whereas in the latter system, release is controlled by dissolution of the pSi/magnesium silicate matrix. The protein release characteristics are studied under accelerated (0.1 M aqueous KOH, 21 °C) and physiologically relevant (phosphate-buffered saline, pH 7.4, 37 °C) conditions, and the near-infrared photoluminescence signal from the pSi skeleton is monitored as a function of time and correlated with protein release and silicon dissolution. The thickness of the Si core and the SiO2 shell are systematically varied, and it is found that the luminescence signature can be tuned to provide a signal that either scales with protein elution or that changes rapidly near the end of useful life of the delivery system. Although payload release and particle dissolution are not driven by the same mechanism, the correlations between luminescence and payload elution for the various formulations can be used to define design rules for this self-reporting delivery system.
Collapse
Affiliation(s)
- Joanna Wang
- Material Science and Engineering Program, University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093-0358, United States
| | - Tushar Kumeria
- Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093-0358, United States
- School of Pharmacy, The University of Queensland, 20 Cornwall Street, Woolloongabba, Queensland 4102, Australia
| | - Maria Teresa Bezem
- Department of Biomedicine, University of Bergen, Jonas Lies vei 91, N-5020 Bergen, Norway
| | - Jian Wang
- School of Physics and Electronic Information Engineering, Henan Polytechnic University, Jiaozuo 454000, China
| | - Michael J. Sailor
- Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093-0358, United States
- Corresponding Author:
| |
Collapse
|
44
|
Abstract
A porous photonic crystal is integrated with a plastic medical fixture (IV connector hub) to provide a visual colorimetric sensor to indicate the presence or absence of alcohol used to sterilize the fixture. The photonic crystal is prepared in porous silicon (pSi) by electrochemical anodization of single crystal silicon, and the porosity and the stop band of the material is engineered such that the integrated device visibly changes color (green to red or blue to green) when infiltrated with alcohol. Two types of self-reporting devices are prepared and their performance compared: the first type involves heat-assisted fusion of a freestanding pSi photonic crystal to the connector end of a preformed polycarbonate hub, forming a composite where the unfilled portion of the pSi film acts as the sensor; the second involves generation of an all-polymer replica of the pSi photonic crystal by complete thermal infiltration of the pSi film and subsequent chemical dissolution of the pSi portion. Both types of sensors visibly change color when wetted with alcohol, and the color reverts to the original upon evaporation of the liquid. The sensor performance is verified using E. coli-infected samples.
Collapse
Affiliation(s)
- Tushar Kumeria
- Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093, United States
- School of Pharmacy, University of Queensland, 20 Cornwall Street, Woolloongabba, Queensland-4102, Australia
| | - Joanna Wang
- Materials Science and Engineering Program, University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093, United States
| | - Nicole Chan
- Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093, United States
| | - Todd J. Harris
- Sienna Biopharmaceuticals Inc., 30699 Russell Ranch Road, Suite 140, Westlake Village, California 91362, United States
| | - Michael J Sailor
- Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093, United States
| |
Collapse
|
45
|
Hussain S, Joo J, Kang J, Kim B, Braun GB, She ZG, Kim D, Mann AP, Mölder T, Teesalu T, Carnazza S, Guglielmino S, Sailor MJ, Ruoslahti E. Antibiotic-loaded nanoparticles targeted to the site of infection enhance antibacterial efficacy. Nat Biomed Eng 2018; 2:95-103. [PMID: 29955439 DOI: 10.1038/s41551-017-0187-5] [Citation(s) in RCA: 226] [Impact Index Per Article: 37.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Bacterial resistance to antibiotics has made it necessary to resort to antibiotics that have considerable toxicities. Here, we show that the cyclic 9-amino acid peptide CARGGLKSC (CARG), identified via phage display on Staphylococcus aureus (S. aureus) bacteria and through in vivo screening in mice with S. aureus-induced lung infections, increases the antibacterial activity of CARG-conjugated vancomycin-loaded nanoparticles in S. aureus-infected tissues and reduces the needed overall systemic dose, minimizing side effects. CARG binds specifically to S. aureus bacteria but not Pseudomonas bacteria in vitro, selectively accumulates in S. aureus-infected lungs and skin of mice but not in non-infected tissue and Pseudomonas-infected tissue, and significantly enhances the accumulation of intravenously injected vancomycin-loaded porous silicon nanoparticles bearing the peptide in S. aureus-infected mouse lung tissue. The targeted nanoparticles more effectively suppress staphylococcal infections in vivo relative to equivalent doses of untargeted vancomycin nanoparticles or of free vancomycin. The therapeutic delivery of antibiotic-carrying nanoparticles bearing peptides targeting infected tissue may help combat difficult-to-treat infections.
Collapse
Affiliation(s)
- Sazid Hussain
- Cancer Research Center, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA, USA
| | - Jinmyoung Joo
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, CA, USA.,Biomedical Engineering Research Center, Asan Institute for Life Sciences, Asan Medical Center, Seoul, Republic of Korea.,Department of Convergence Medicine, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Jinyoung Kang
- Department of Nanoengineering, University of California, San Diego, La Jolla, CA, USA
| | - Byungji Kim
- Materials Science and Engineering Program, University of California, San Diego, La Jolla, CA, USA
| | - Gary B Braun
- Cancer Research Center, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA, USA.,STEMCELL Technologies Inc., Vancouver, Canada
| | - Zhi-Gang She
- Cancer Research Center, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA, USA.,Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, China
| | - Dokyoung Kim
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, CA, USA
| | - Aman P Mann
- Cancer Research Center, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA, USA
| | - Tarmo Mölder
- Laboratory of Cancer Biology, Institute of Biomedicine and Translational Medicine, University of Tartu, Tartu, Estonia
| | - Tambet Teesalu
- Cancer Research Center, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA, USA.,Laboratory of Cancer Biology, Institute of Biomedicine and Translational Medicine, University of Tartu, Tartu, Estonia.,Center for Nanomedicine, and Department of Cell, Molecular and Developmental Biology, University of California, Santa Barbara, Santa Barbara, CA, USA
| | - Santina Carnazza
- Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali- ChiBioFarAm, Università di Messina, Messina, Italy
| | - Salvatore Guglielmino
- Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali- ChiBioFarAm, Università di Messina, Messina, Italy
| | - Michael J Sailor
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, CA, USA.,Department of Nanoengineering, University of California, San Diego, La Jolla, CA, USA.,Materials Science and Engineering Program, University of California, San Diego, La Jolla, CA, USA
| | - Erkki Ruoslahti
- Cancer Research Center, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA, USA. .,Center for Nanomedicine, and Department of Cell, Molecular and Developmental Biology, University of California, Santa Barbara, Santa Barbara, CA, USA.
| |
Collapse
|
46
|
Moon SW, Sun Y, Warther D, Huffman K, Freeman WR, Sailor MJ, Cheng L. New model of proliferative vitreoretinopathy in rabbit for drug delivery and pharmacodynamic studies. Drug Deliv 2018; 25:600-610. [PMID: 29461171 PMCID: PMC6058613 DOI: 10.1080/10717544.2018.1440664] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [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] [Indexed: 11/08/2022] Open
Abstract
Blinding retinal diseases become more epidemic as the population ages. These diseases, such as diabetic retinopathy and macular edema, are of chronic nature and require protracted drug presence at the disease site. A sustained intravitreal porous silicon delivery system with dexamethasone (pSiO2-COO-DEX) was evaluated in a new rabbit model of proliferative vitreoretinopathy (PVR) in a real treatment design. In contrast to the pretreatment design model, pSiO2-COO-DEX was intravitreally injected into the eyes with active inflammation. Subretinal injection of vascular endothelial growth factor (VEGF) and Matrigel induced a late-onset vitreoretinal inflammation that gradually developed into PVR. This method mimics the human disease better than PVR induced by either intravitreal cell injection or trauma. The pSiO2-COO-DEX intervened eyes had minimal PVR, while balanced saline solution or free dexamethasone intervened eyes had significantly more PVR formation. In addition, adding VEGF to the Matrigel for subretinal injection induced greater inflammation and retinal neovascularization in comparison to only Matrigel injected under the medullary ray. Clinical and pathological examinations, including fundus fluorescein angiography and optical coherence tomography, confirmed these changes. In the current study, neither subretinal injection of Matrigel or subretinal injection of VEGF and Matrigel induced choroidal neovascularization. However, the current PVR model demonstrates a chronic course with moderate severity, which may be useful for drug screening studies.
Collapse
Affiliation(s)
- Sang Woong Moon
- a Department of Ophthalmology , Jacobs Retina Center at Shiley Eye Institute, University of California San Diego , La Jolla , CA , USA.,b Department of Ophthalmology, College of Medicine , Kyung Hee University , Seoul , Republic of Korea
| | - Yaoyao Sun
- a Department of Ophthalmology , Jacobs Retina Center at Shiley Eye Institute, University of California San Diego , La Jolla , CA , USA.,c Department of Ophthalmology , Ophthalmology & Optometry Center, Peking University People's Hospital , Beijing , China
| | - David Warther
- d Department of Chemistry and Biochemistry , University of California San Diego , La Jolla , CA , USA
| | - Kristyn Huffman
- a Department of Ophthalmology , Jacobs Retina Center at Shiley Eye Institute, University of California San Diego , La Jolla , CA , USA
| | - William R Freeman
- a Department of Ophthalmology , Jacobs Retina Center at Shiley Eye Institute, University of California San Diego , La Jolla , CA , USA
| | - Michael J Sailor
- d Department of Chemistry and Biochemistry , University of California San Diego , La Jolla , CA , USA
| | - Lingyun Cheng
- a Department of Ophthalmology , Jacobs Retina Center at Shiley Eye Institute, University of California San Diego , La Jolla , CA , USA
| |
Collapse
|
47
|
Kim D, Kang J, Wang T, Ryu HG, Zuidema JM, Joo J, Kim M, Huh Y, Jung J, Ahn KH, Kim KH, Sailor MJ. Two-Photon In Vivo Imaging with Porous Silicon Nanoparticles. Adv Mater 2017; 29:1703309. [PMID: 28833739 DOI: 10.1002/adma.201703309] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2017] [Revised: 07/19/2017] [Indexed: 06/07/2023]
Abstract
A major obstacle in luminescence imaging is the limited penetration of visible light into tissues and interference associated with light scattering and autofluorescence. Near-infrared (NIR) emitters that can also be excited with NIR radiation via two-photon processes can mitigate these factors somewhat because they operate at wavelengths of 650-1000 nm where tissues are more transparent, light scattering is less efficient, and endogenous fluorophores are less likely to absorb. This study presents photolytically stable, NIR photoluminescent, porous silicon nanoparticles with a relatively high two-photon-absorption cross-section and a large emission quantum yield. Their ability to be targeted to tumor tissues in vivo using the iRGD targeting peptide is demonstrated, and the distribution of the nanoparticles with high spatial resolution is visualized.
Collapse
Affiliation(s)
- Dokyoung Kim
- Department of Anatomy and Neurobiology, College of Medicine, Kyung Hee University, 26 Kyungheedae-Ro, Dongdaemun-Gu, Seoul, 02447, Republic of Korea
- Center for Converging Humanities, Kyung Hee University, 26 Kyungheedae-Ro, Dongdaemun-Gu, Seoul, 02447, Republic of Korea
| | - Jinyoung Kang
- Department of Nanoengineering, University of California, San Diego, La Jolla, CA, 92093-0358, USA
| | - Taejun Wang
- Division of Integrative Biosciences and Biotechnology, Pohang University of Science and Technology (POSTECH), 77 Cheongam-Ro, Pohang, Gyungbuk, 37673, Republic of Korea
| | - Hye Gun Ryu
- Department of Chemistry, Pohang University of Science and Technology (POSTECH), 77 Cheongam-Ro, Nam-Gu, Pohang, Gyungbuk, 37673, Republic of Korea
| | - Jonathan M Zuidema
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, CA, 92093-0358, USA
| | - Jinmyoung Joo
- Department of Convergence Medicine, University of Ulsan College of Medicine, 88 Olympic-ro 43-gil, Songpa-gu, Seoul, 05505, Republic of Korea
- Biomedical Engineering Research Center, Asan Institute for Life Science, Asan Medical Center, 88 Olympic-ro 43-gil, Songpa-gu, Seoul, 05505, Republic of Korea
| | - Muwoong Kim
- Department of Anatomy and Neurobiology, College of Medicine, Kyung Hee University, 26 Kyungheedae-Ro, Dongdaemun-Gu, Seoul, 02447, Republic of Korea
| | - Youngbuhm Huh
- Department of Anatomy and Neurobiology, College of Medicine, Kyung Hee University, 26 Kyungheedae-Ro, Dongdaemun-Gu, Seoul, 02447, Republic of Korea
| | - Junyang Jung
- Department of Anatomy and Neurobiology, College of Medicine, Kyung Hee University, 26 Kyungheedae-Ro, Dongdaemun-Gu, Seoul, 02447, Republic of Korea
| | - Kyo Han Ahn
- Department of Chemistry, Pohang University of Science and Technology (POSTECH), 77 Cheongam-Ro, Nam-Gu, Pohang, Gyungbuk, 37673, Republic of Korea
| | - Ki Hean Kim
- Division of Integrative Biosciences and Biotechnology, Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), 77 Cheongam-Ro, Pohang, Gyungbuk, 37673, Republic of Korea
| | - Michael J Sailor
- Department of Chemistry and Biochemistry, Department of Nanoengineering, University of California, San Diego, La Jolla, CA, 92093-0358, USA
| |
Collapse
|
48
|
Kwon EJ, Skalak M, Bertucci A, Braun G, Ricci F, Ruoslahti E, Sailor MJ, Bhatia SN. Porous Silicon Nanoparticle Delivery of Tandem Peptide Anti-Infectives for the Treatment of Pseudomonas aeruginosa Lung Infections. Adv Mater 2017; 29:10.1002/adma.201701527. [PMID: 28699173 PMCID: PMC5765747 DOI: 10.1002/adma.201701527] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [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: 03/17/2017] [Revised: 05/25/2017] [Indexed: 05/07/2023]
Abstract
There is an urgent need for new materials to treat bacterial infections. In order to improve antibacterial delivery, an anti-infective nanomaterial is developed that utilizes two strategies for localization: i) a biodegradable nanoparticle carrier to localize therapeutics within the tissue, and ii) a novel tandem peptide cargo to localize payload to bacterial membranes. First, a library of antibacterial peptides is screened that combines a membrane-localizing peptide with a toxic peptide cargo and discovers a tandem peptide that displays synergy between the two domains and is able to kill Pseudomonas aeruginosa at sub-micromolar concentrations. To apply this material to the lung, the tandem peptide is loaded into porous silicon nanoparticles (pSiNPs). Charged peptide payloads are loaded into the pores of the pSiNP at ≈30% mass loading and ≈90% loading efficiency using phosphonate surface chemistry. When delivered to the lungs of mice, this anti-infective nanomaterial exhibits improved safety profiles over free peptides. Moreover, treatment of a lung infection of P. aeruginosa results in a large reduction in bacterial numbers and markedly improves survival compared to untreated mice. Collectively, this study presents the selection of a bifunctional peptide-based anti-infective agent and its delivery via biodegradable nanoparticles for application to an animal model of lung infection.
Collapse
Affiliation(s)
- Ester J Kwon
- Koch Institute for Integrative Cancer Research and Harvard-MIT Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| | - Matthew Skalak
- Koch Institute for Integrative Cancer Research and Harvard-MIT Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| | - Alessandro Bertucci
- Department of Chemistry and Biochemistry, University of California at San Diego, La Jolla, CA, 92093, USA
- Dipartimento di Scienze e Tecnologie Chimiche, University of Rome, Tor Vergata, Via della Ricerca Scientifica, Rome, 00133, Italy
| | - Gary Braun
- Cancer Research Center, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA, 92037, USA
| | - Francesco Ricci
- Dipartimento di Scienze e Tecnologie Chimiche, University of Rome, Tor Vergata, Via della Ricerca Scientifica, Rome, 00133, Italy
| | - Erkki Ruoslahti
- Cancer Research Center, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA, 92037, USA
| | - Michael J Sailor
- Department of Chemistry and Biochemistry, University of California at San Diego, La Jolla, CA, 92093, USA
| | - Sangeeta N Bhatia
- Koch Institute for Integrative Cancer Research, Institute for Medical Engineering and Science, Harvard-MIT Division of Health Sciences and Technology, Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
- Howard Hughes Medical Institute, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| |
Collapse
|
49
|
Kwon EJ, Skalak M, Bertucci A, Braun G, Ricci F, Ruoslahti E, Sailor MJ, Bhatia SN. Porous Silicon Nanoparticle Delivery of Tandem Peptide Anti-Infectives for the Treatment of Pseudomonas aeruginosa Lung Infections. Adv Mater 2017. [PMID: 28699173 DOI: 10.1002/adma.201701527.] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
There is an urgent need for new materials to treat bacterial infections. In order to improve antibacterial delivery, an anti-infective nanomaterial is developed that utilizes two strategies for localization: i) a biodegradable nanoparticle carrier to localize therapeutics within the tissue, and ii) a novel tandem peptide cargo to localize payload to bacterial membranes. First, a library of antibacterial peptides is screened that combines a membrane-localizing peptide with a toxic peptide cargo and discovers a tandem peptide that displays synergy between the two domains and is able to kill Pseudomonas aeruginosa at sub-micromolar concentrations. To apply this material to the lung, the tandem peptide is loaded into porous silicon nanoparticles (pSiNPs). Charged peptide payloads are loaded into the pores of the pSiNP at ≈30% mass loading and ≈90% loading efficiency using phosphonate surface chemistry. When delivered to the lungs of mice, this anti-infective nanomaterial exhibits improved safety profiles over free peptides. Moreover, treatment of a lung infection of P. aeruginosa results in a large reduction in bacterial numbers and markedly improves survival compared to untreated mice. Collectively, this study presents the selection of a bifunctional peptide-based anti-infective agent and its delivery via biodegradable nanoparticles for application to an animal model of lung infection.
Collapse
Affiliation(s)
- Ester J Kwon
- Koch Institute for Integrative Cancer Research and Harvard-MIT Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| | - Matthew Skalak
- Koch Institute for Integrative Cancer Research and Harvard-MIT Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| | - Alessandro Bertucci
- Department of Chemistry and Biochemistry, University of California at San Diego, La Jolla, CA, 92093, USA.,Dipartimento di Scienze e Tecnologie Chimiche, University of Rome, Tor Vergata, Via della Ricerca Scientifica, Rome, 00133, Italy
| | - Gary Braun
- Cancer Research Center, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA, 92037, USA
| | - Francesco Ricci
- Dipartimento di Scienze e Tecnologie Chimiche, University of Rome, Tor Vergata, Via della Ricerca Scientifica, Rome, 00133, Italy
| | - Erkki Ruoslahti
- Cancer Research Center, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA, 92037, USA
| | - Michael J Sailor
- Department of Chemistry and Biochemistry, University of California at San Diego, La Jolla, CA, 92093, USA
| | - Sangeeta N Bhatia
- Koch Institute for Integrative Cancer Research, Institute for Medical Engineering and Science, Harvard-MIT Division of Health Sciences and Technology, Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA.,Howard Hughes Medical Institute, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| |
Collapse
|
50
|
Kim T, Fu X, Warther D, Sailor MJ. Size-Controlled Pd Nanoparticle Catalysts Prepared by Galvanic Displacement into a Porous Si-Iron Oxide Nanoparticle Host. ACS Nano 2017; 11:2773-2784. [PMID: 28195692 DOI: 10.1021/acsnano.6b07820] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Porous silicon nanoparticles containing both Pd and iron oxide nanoparticles are prepared and studied as magnetically recoverable catalysts for organic reductions. The Pd nanoparticles are generated in situ by electroless deposition of Pd(NH3)42+, where the porous Si skeleton acts as both a template and as a reducing agent and the released ammonia ligands raise the local pH to exert control over the size of the Pd nanoparticles. The nanocomposites are characterized by transmission electron microscopy, energy-dispersive X-ray spectroscopy, nitrogen adsorption, X-ray diffraction, superconducting quantum interference device magnetization, and dynamic light scattering. The nanocomposite consists of a porous Si nanoparticle (150 nm mean diameter) containing ∼20 nm pores, uniformly decorated with a high loading of surfactant-free Pd nanoparticles (12 nm mean diameter) and superparamagnetic γ-Fe2O3 nanoparticles (∼7 nm mean diameter). The reduction of 4-nitrophenol to 4-aminophenol by sodium borohydride is catalyzed by the nanocomposite, which is stable through the course of the reaction. Catalytic reduction of the organic dyes methylene blue and rhodamine B is also demonstrated. The conversion efficiency and catalytic activity are found to be superior to a commercial Pd/C catalyst compared under comparable reaction conditions. The composite catalyst can be recovered from the reaction mixture by applying an external magnetic field due to the existence of the superparamagnetic iron oxide nanoparticles in the construct. The recovered particles retain their catalytic activity.
Collapse
Affiliation(s)
- Taeho Kim
- Department of Chemistry and Biochemistry and ‡Department of Nanoengineering, University of California, San Diego , La Jolla, California 92093, United States
| | - Xin Fu
- Department of Chemistry and Biochemistry and ‡Department of Nanoengineering, University of California, San Diego , La Jolla, California 92093, United States
| | - David Warther
- Department of Chemistry and Biochemistry and ‡Department of Nanoengineering, University of California, San Diego , La Jolla, California 92093, United States
| | - Michael J Sailor
- Department of Chemistry and Biochemistry and ‡Department of Nanoengineering, University of California, San Diego , La Jolla, California 92093, United States
| |
Collapse
|