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Alden NA, Yeingst TJ, Pfeiffer HM, Celik N, Arrizabalaga JH, Helton AM, Liu Y, Stairs DB, Glick AB, Goyal N, Hayes DJ. Near-Infrared Induced miR-34a Delivery from Nanoparticles in Esophageal Cancer Treatment. Adv Healthc Mater 2024; 13:e2303593. [PMID: 38215360 PMCID: PMC11032112 DOI: 10.1002/adhm.202303593] [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: 10/18/2023] [Revised: 12/21/2023] [Indexed: 01/14/2024]
Abstract
Current nucleic acid delivery methods have not achieved efficient, non-toxic delivery of miRNAs with tumor-specific selectivity. In this study, a new delivery system based on light-inducible gold-silver-gold, core-shell-shell (CSS) nanoparticles is presented. This system delivers small nucleic acid therapeutics with precise spatiotemporal control, demonstrating the potential for achieving tumor-specific selectivity and efficient delivery of miRNA mimics. The light-inducible particles leverage the photothermal heating of metal nanoparticles due to the local surface plasmonic resonance for controlled chemical cleavage and release of the miRNA mimic payload. The CSS morphology and composition result in a plasmonic resonance within the near-infrared (NIR) region of the light spectrum. Through this method, exogenous miR-34a-5p mimics are effectively delivered to human squamous cell carcinoma TE10 cells, leading to apoptosis induction without adverse effects on untransformed keratinocytes in vitro. The CSS nanoparticle delivery system is tested in vivo in Foxn1nu athymic nude mice with bilateral human esophageal TE10 cancer cells xenografts. These experiments reveal that this CSS nanoparticle conjugates, when systemically administered, followed by 850 nm light emitting diode irradiation at the tumor site, 6 h post-injection, produce a significant and sustained reduction in tumor volume, exceeding 87% in less than 72 h.
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Affiliation(s)
- Nick A. Alden
- Department of Biomedical Engineering, The Pennsylvania State University, University Park, PA 16802, United States
| | - Tyus J. Yeingst
- Department of Biomedical Engineering, The Pennsylvania State University, University Park, PA 16802, United States
| | - Hanna M. Pfeiffer
- Department of Biomedical Engineering, The Pennsylvania State University, University Park, PA 16802, United States
| | - Nazmiye Celik
- The Huck Institute of the Life Sciences, Millennium Science Complex, The Pennsylvania State University, University Park, PA 16802, United States
- Department of Engineering Science and Mechanics, Penn State University, 212 Earth-Engineering Sciences Bldg., University Park, PA 16802, United States
| | - Julien H. Arrizabalaga
- Department of Biomedical Engineering, The Pennsylvania State University, University Park, PA 16802, United States
| | - Angelica M. Helton
- Department of Biomedical Engineering, The Pennsylvania State University, University Park, PA 16802, United States
| | - Yiming Liu
- Department of Biomedical Engineering, The Pennsylvania State University, University Park, PA 16802, United States
| | - Douglas B. Stairs
- Department of Pathology, College of Medicine, The Pennsylvania State University, Hershey, PA 17033, United States
- Penn State Cancer Institute, College of Medicine, The Pennsylvania State University, Hershey, PA 17033, United States
| | - Adam B. Glick
- The Huck Institute of the Life Sciences, Millennium Science Complex, The Pennsylvania State University, University Park, PA 16802, United States
- Department of Veterinary and Biomedical Sciences, The Pennsylvania State University, University Park, PA 16802, United States
- The Center for Molecular Toxicology and Carcinogenesis, The Pennsylvania State University, University Park, PA 16802, United States
| | - Neerav Goyal
- Department of Otolaryngology - Head and Neck Surgery, College of Medicine, The Pennsylvania State University, Hershey, PA 17033, United States
| | - Daniel J. Hayes
- Department of Biomedical Engineering, The Pennsylvania State University, University Park, PA 16802, United States
- The Huck Institute of the Life Sciences, Millennium Science Complex, The Pennsylvania State University, University Park, PA 16802, United States
- Materials Research Institute, Millennium Science Complex, The Pennsylvania State University, University Park, PA 16802, United States
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Wei X, Hayes DJ, Li D, Butman DE, Brewin RJW. Fates of Terrigenous Dissolved Organic Carbon in the Gulf of Maine. Environ Sci Technol 2024. [PMID: 38324705 DOI: 10.1021/acs.est.3c08218] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/09/2024]
Abstract
A significant amount of organic carbon is transported in dissolved form from soils to coastal oceans via inland water systems, bridging land and ocean carbon reservoirs. However, it has been discovered that the presence of terrigenous dissolved organic carbon (tDOC) in oceans is relatively limited. Therefore, understanding the fates of tDOC in coastal oceans is essential to account for carbon sequestration through land ecosystems and ensure accurate regional carbon budgeting. In this study, we developed a state-of-the-art modeling approach by coupling a land-to-ocean tDOC flux simulation model and a coastal tDOC tracking model to determine the potential fates of tDOC exported from three primary drainage basins in the Gulf of Maine (GoM). According to our findings, over half a year in the GoM, 56.4% of tDOC was mineralized. Biomineralization was responsible for 90% of that amount, with the remainder attributed to photomineralization. Additionally, 37% of the tDOC remained suspended in the GoM, and 6.6% was buried in the marine sediment.
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Affiliation(s)
- Xinyuan Wei
- Center for Research on Sustainable Forests, University of Maine, Orono, Maine 04469, United States
- School of Forest Resources, University of Maine, Orono, Maine 04469, United States
| | - Daniel J Hayes
- Center for Research on Sustainable Forests, University of Maine, Orono, Maine 04469, United States
- School of Forest Resources, University of Maine, Orono, Maine 04469, United States
| | - Denghui Li
- School of Marine Sciences, University of Maine, Orono, Maine 04469, United States
| | - David E Butman
- School of Environmental and Forest Sciences, University of Washington, Seattle, Washington 98195, United States
| | - Robert J W Brewin
- Department of Earth and Environmental Science, University of Exeter, Penryn Campus, Cornwall TR10 9FE, U.K
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Yeingst TJ, Arrizabalaga JH, Rawnaque FS, Stone LP, Yeware A, Helton AM, Dhawan A, Simon JC, Hayes DJ. Controlled Degradation of Polycaprolactone Polymers through Ultrasound Stimulation. ACS Appl Mater Interfaces 2023; 15:34607-34616. [PMID: 37432796 PMCID: PMC10496768 DOI: 10.1021/acsami.3c06873] [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] [Subscribe] [Scholar Register] [Indexed: 07/13/2023]
Abstract
This study describes the development of an ultrasound-responsive polymer system that provides on-demand degradation when exposed to high-intensity focused ultrasound (HIFU). Diels-Alder cycloadducts were used to crosslink polycaprolactone (PCL) polymers and underwent a retro Diels-Alder reaction when stimulated with HIFU. Two Diels-Alder polymer compositions were explored to evaluate the link between reverse reaction energy barriers and polymer degradation rates. PCL crosslinked with isosorbide was also used as a non-Diels-Alder-based control polymer. An increase of HIFU exposure time and amplitude correlated with an increase of PCL degradation for Diels-Alder-based polymers. Ultrasound imaging during HIFU allowed for real-time visualization of the on-demand degradation through cavitation-based mechanisms. The temperature surrounding the sample was monitored with a thermocouple during HIFU stimulation; a minimal increase in temperature was observed. PCL polymers were characterized using Fourier transform infrared (FTIR) spectroscopy, nuclear magnetic resonance (NMR), differential scanning calorimetry (DSC), optical profilometry, and mechanical testing. PCL degradation byproducts were identified by mass spectrometry, and their cytocompatibility was evaluated in vitro. Overall, this study demonstrated that HIFU is an effective image-guided, external stimulus to control the degradation of Diels-Alder-based PCL polymers on-demand.
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Affiliation(s)
- Tyus J Yeingst
- Department of Biomedical Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
| | - Julien H Arrizabalaga
- Department of Biomedical Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
| | - Ferdousi S Rawnaque
- Graduate Program in Acoustics, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
| | - Lindsay P Stone
- Department of Biomedical Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
| | - Amar Yeware
- Department of Biomedical Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
| | - Angelica M Helton
- Department of Biomedical Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
| | - Aman Dhawan
- Department of Orthopaedics and Rehabilitation, Penn State College of Medicine, Milton S. Hershey Medical Center, Hershey, Pennsylvania 17033, United States
| | - Julianna C Simon
- Department of Biomedical Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
- Graduate Program in Acoustics, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
| | - Daniel J Hayes
- Department of Biomedical Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
- Materials Research Institute, Millennium Science Complex, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
- The Huck Institute of Life Sciences, Millennium Science Complex, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
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4
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Wei X, Zhao J, Hayes DJ, Daigneault A, Zhu H. A life cycle and product type based estimator for quantifying the carbon stored in wood products. Carbon Balance Manag 2023; 18:1. [PMID: 36645509 PMCID: PMC9844030 DOI: 10.1186/s13021-022-00220-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/31/2022] [Accepted: 12/08/2022] [Indexed: 06/17/2023]
Abstract
BACKGROUND Timber harvesting and industrial wood processing laterally transfer the carbon stored in forest sectors to wood products creating a wood products carbon pool. The carbon stored in wood products is allocated to end-use wood products (e.g., paper, furniture), landfill, and charcoal. Wood products can store substantial amounts of carbon and contribute to the mitigation of greenhouse effects. Therefore, accurate accounts for the size of wood products carbon pools for different regions are essential to estimating the land-atmosphere carbon exchange by using the bottom-up approach of carbon stock change. RESULTS To quantify the carbon stored in wood products, we developed a state-of-the-art estimator (Wood Products Carbon Storage Estimator, WPsCS Estimator) that includes the wood products disposal, recycling, and waste wood decomposition processes. The wood products carbon pool in this estimator has three subpools: (1) end-use wood products, (2) landfill, and (3) charcoal carbon. In addition, it has a user-friendly interface, which can be used to easily parameterize and calibrate an estimation. To evaluate its performance, we applied this estimator to account for the carbon stored in wood products made from the timber harvested in Maine, USA, and the carbon storage of wood products consumed in the United States. CONCLUSION The WPsCS Estimator can efficiently and easily quantify the carbon stored in harvested wood products for a given region over a specific period, which was demonstrated with two illustrative examples. In addition, WPsCS Estimator has a user-friendly interface, and all parameters can be easily modified.
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Affiliation(s)
- Xinyuan Wei
- Environmental Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37830, USA.
- Center for Research on Sustainable Forests, University of Maine, Orono, ME, 04469, USA.
| | - Jianheng Zhao
- Center for Research on Sustainable Forests, University of Maine, Orono, ME, 04469, USA
- School of Forest Resources, University of Maine, Orono, ME, 04469, USA
| | - Daniel J Hayes
- School of Forest Resources, University of Maine, Orono, ME, 04469, USA
| | - Adam Daigneault
- School of Forest Resources, University of Maine, Orono, ME, 04469, USA
| | - He Zhu
- Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, 100101, China
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5
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Yeingst TJ, Arrizabalaga JH, Hayes DJ. Ultrasound-Induced Drug Release from Stimuli-Responsive Hydrogels. Gels 2022; 8:554. [PMID: 36135267 PMCID: PMC9498906 DOI: 10.3390/gels8090554] [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] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2022] [Revised: 08/27/2022] [Accepted: 08/29/2022] [Indexed: 12/16/2022] Open
Abstract
Stimuli-responsive hydrogel drug delivery systems are designed to release a payload when prompted by an external stimulus. These platforms have become prominent in the field of drug delivery due to their ability to provide spatial and temporal control for drug release. Among the different external triggers that have been used, ultrasound possesses several advantages: it is non-invasive, has deep tissue penetration, and can safely transmit acoustic energy to a localized area. This review summarizes the current state of understanding about ultrasound-responsive hydrogels used for drug delivery. The mechanisms of inducing payload release and activation using ultrasound are examined, along with the latest innovative formulations and hydrogel design strategies. We also report on the most recent applications leveraging ultrasound activation for both cancer treatment and tissue engineering. Finally, the future perspectives offered by ultrasound-sensitive hydrogels are discussed.
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Affiliation(s)
- Tyus J. Yeingst
- Department of Biomedical Engineering, The Pennsylvania State University, University Park, Centre County, PA 16802, USA
| | - Julien H. Arrizabalaga
- Department of Biomedical Engineering, The Pennsylvania State University, University Park, Centre County, PA 16802, USA
| | - Daniel J. Hayes
- Department of Biomedical Engineering, The Pennsylvania State University, University Park, Centre County, PA 16802, USA
- Materials Research Institute, Millennium Science Complex, The Pennsylvania State University, University Park, Centre County, PA 16802, USA
- The Huck Institute of the Life Sciences, Millennium Science Complex, The Pennsylvania State University, University Park, Centre County, PA 16802, USA
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Celik N, Kim MH, Yeo M, Kamal F, Hayes DJ, Ozbolat IT. miRNA induced 3D bioprinted-heterotypic osteochondral interface. Biofabrication 2022; 14:10.1088/1758-5090/ac7fbb. [PMID: 35803212 PMCID: PMC9588307 DOI: 10.1088/1758-5090/ac7fbb] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Accepted: 07/08/2022] [Indexed: 11/12/2022]
Abstract
The engineering of osteochondral interfaces remains a challenge. MicroRNAs (miRs) have emerged as significant tools to regulate the differentiation and proliferation of osteogenic and chondrogenic formation in the human musculoskeletal system. Here, we describe a novel approach to osteochondral reconstruction based on the three-dimensional (3D) bioprinting of miR-transfected adipose-derived stem cell (ADSC) spheroids to produce a heterotypic interface that addresses the intrinsic limitations of the traditional approach to inducing zonal differentiation via the use of diffusible cytokines. We evaluated the delivery of miR-148b for osteogenic differentiation and the codelivery of miR-140 and miR-21 for the chondrogenic differentiation of ADSC spheroids. Our results demonstrated that miR-transfected ADSC spheroids exhibited upregulated expression of osteogenic and chondrogenic differentiation related gene and protein markers, and enhanced mineralization and cell proliferation compared to spheroids differentiated using a commercially-available differentiation medium. Upon confirmation of the osteogenic and chondrogenic potential of miR-transfected ADSC spheroids, using aspiration-assisted bioprinting, these spheroids were 3D bioprinted into a dual-layer heterotypic osteochondral interface with a stratified arrangement of distinct osteogenic and chondrogenic zones. The proposed approach holds great promise for the biofabrication of stratified tissues, not only for the osteochondral interfaces presented in this work, but also for other composite tissues and tissue interfaces, such as, but not limited to, the bone-tendon-muscle interface and craniofacial tissues.
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Affiliation(s)
- Nazmiye Celik
- Department of Engineering Science and Mechanics, Penn State University, 212 Earth-Engineering Sciences Bldg., University Park, PA 16802, USA
- The Huck Institutes of the Life Sciences, Penn State University, University Park, PA 16802, USA
| | - Myoung Hwan Kim
- The Huck Institutes of the Life Sciences, Penn State University, University Park, PA 16802, USA
- Department of Biomedical Engineering, Penn State University, Chemical and Biomedical Engineering Bldg., University Park, PA 16802, USA
| | - Miji Yeo
- Department of Engineering Science and Mechanics, Penn State University, 212 Earth-Engineering Sciences Bldg., University Park, PA 16802, USA
- The Huck Institutes of the Life Sciences, Penn State University, University Park, PA 16802, USA
| | - Fadia Kamal
- Center for Orthopedic Research and Translational Sciences, Department of Orthopedics and Re-Habilitation, Penn State University, Hershey, PA 17033, USA
| | - Daniel J. Hayes
- The Huck Institutes of the Life Sciences, Penn State University, University Park, PA 16802, USA
- Department of Biomedical Engineering, Penn State University, Chemical and Biomedical Engineering Bldg., University Park, PA 16802, USA
- Materials Research Institute, Penn State University, University Park, PA 16802, USA
| | - Ibrahim T. Ozbolat
- Department of Engineering Science and Mechanics, Penn State University, 212 Earth-Engineering Sciences Bldg., University Park, PA 16802, USA
- The Huck Institutes of the Life Sciences, Penn State University, University Park, PA 16802, USA
- Department of Biomedical Engineering, Penn State University, Chemical and Biomedical Engineering Bldg., University Park, PA 16802, USA
- Materials Research Institute, Penn State University, University Park, PA 16802, USA
- Department of Neurosurgery, Penn State College of Medicine, Hershey, PA 17033, USA
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Alden NA, Arrizabalaga JH, Liu Y, Amin S, Gowda K, Yao S, Archetti M, Glick AB, Hayes DJ. Delivery of Therapeutic miR-148b Mimic via Poly(β Amino Ester) Polyplexes for Post-transcriptional Gene Regulation and Apoptosis of A549 Cells. Langmuir 2022; 38:9833-9843. [PMID: 35916504 PMCID: PMC10496413 DOI: 10.1021/acs.langmuir.2c00913] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
In this study, we utilized selectively modified, biodegradable polymer-based polyplexes to deliver custom, exogenous miR-148b mimics to induce apoptosis in human lung cancer (A549) cells. The gene regulatory effects of the payload miRNA mimics (miR-148b-3p) were first evaluated through bioinformatic analyses to uncover specific gene targets involved in critical carcinogenic pathways. Hyperbranched poly(β amino ester) polyplexes (hPBAE) loaded with custom miR-148b mimics were then developed for targeted therapy. When evaluated in vitro, these hPBAE-based polyplexes sustained high intracellular uptake, low cytotoxicity, and efficient escape from endosomes to deliver functionally intact miRNA mimics to the cytosol. High-resolution confocal microscopy revealed successful intracellular uptake, cell viability was assessed through qualitative fluorescence microscopy and fluorescence-based DNA quantification, and successful cytosolic delivery of intact miRNA mimics was evaluated using real-time polymerase chain reaction (RT-PCR) to demonstrate target gene knockdown. The hPBAE-miRNA mimic polyplexes were shown to induce apoptosis among A549 cells through direct modulation of intracellular protein expression, targeting multiple potential carcinogenic pathways at the gene level. These results indicated that spatially controlled miR-148b mimic delivery can promote efficient cancer cell death in vitro and may lead to an enhanced therapeutic design for in vivo application.
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Affiliation(s)
- Nick A Alden
- The Department of Biomedical Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
| | - Julien H Arrizabalaga
- The Department of Biomedical Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
| | - Yiming Liu
- The Department of Biomedical Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
| | - Shantu Amin
- Penn State Hershey Cancer Institute, The Pennsylvania State University, College of Medicine, Hershey, Pennsylvania 17033, United States
- The Department of Pharmacology, The Pennsylvania State University, College of Medicine, Hershey, Pennsylvania 17033, United States
| | - Krishne Gowda
- Penn State Hershey Cancer Institute, The Pennsylvania State University, College of Medicine, Hershey, Pennsylvania 17033, United States
- The Department of Pharmacology, The Pennsylvania State University, College of Medicine, Hershey, Pennsylvania 17033, United States
| | - Shun Yao
- The Department of Biology, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
| | - Marco Archetti
- The Department of Biology, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
- The Huck Institute of the Life Sciences, Millennium Science Complex, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
| | - Adam B Glick
- The Huck Institute of the Life Sciences, Millennium Science Complex, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
- Department of Veterinary and Biomedical Sciences, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
- The Center for Molecular Toxicology and Carcinogenesis, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
| | - Daniel J Hayes
- The Department of Biomedical Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
- The Huck Institute of the Life Sciences, Millennium Science Complex, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
- Materials Research Institute, Millennium Science Complex, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
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Arrizabalaga JH, Smallcomb M, Abu-Laban M, Liu Y, Yeingst TJ, Dhawan A, Simon JC, Hayes DJ. Ultrasound-Responsive Hydrogels for On-Demand Protein Release. ACS Appl Bio Mater 2022; 5:3212-3218. [PMID: 35700312 PMCID: PMC10496416 DOI: 10.1021/acsabm.2c00192] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [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: 12/14/2022]
Abstract
The development of tunable, ultrasound-responsive hydrogels that can deliver protein payload on-demand when exposed to focused ultrasound is described in this study. Reversible Diels-Alder linkers, which undergo a retro reaction when stimulated with ultrasound, were used to cross-link chitosan hydrogels with entrapped FITC-BSA as a model protein therapeutic payload. Two Diels-Alder linkage compositions with large differences in the reverse reaction energy barriers were compared to explore the influence of linker composition on ultrasound response. Selected physicochemical properties of the hydrogel construct, its basic degradation kinetics, and its cytocompatibility were measured with respect to Diels-Alder linkage composition. Focused ultrasound initiated the retro Diels-Alder reaction, controlling the release of the entrapped payload while also allowing for real-time visualization of the ongoing process. Additionally, increasing the focused ultrasound amplitude and time correlated with an increased rate of protein release, indicating stimuli responsive control.
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Affiliation(s)
- Julien H Arrizabalaga
- Department of Biomedical Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
| | - Molly Smallcomb
- Graduate Program in Acoustics, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
| | - Mohammad Abu-Laban
- Department of Biomedical Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
| | - Yiming Liu
- Department of Biomedical Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
| | - Tyus J Yeingst
- Department of Biomedical Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
| | - Aman Dhawan
- Department of Orthopaedics and Rehabilitation, Penn State College of Medicine, Milton S. Hershey Medical Center, Hershey, Pennsylvania 17033, United States
| | - Julianna C Simon
- Department of Biomedical Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
- Graduate Program in Acoustics, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
| | - Daniel J Hayes
- Department of Biomedical Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
- Materials Research Institute, Millennium Science Complex, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
- The Huck Institute of the Life Sciences, Millennium Science Complex, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
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Hayes DJ, Gimble JM. Developing a clinical grade human adipose decellularized biomaterial. Biomater Biosyst 2022; 7:100053. [PMID: 36824487 PMCID: PMC9934471 DOI: 10.1016/j.bbiosy.2022.100053] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2022] [Revised: 05/18/2022] [Accepted: 05/24/2022] [Indexed: 11/29/2022] Open
Abstract
While tissue engineering investigators have appreciated adipose tissue as a repository of stromal/stem cells, they are only now beginning to see its value as a decellularized tissue resource. Independent academic investigators have successfully extracted lipid, genomic DNA and proteins from human fat to create a decellularized extracellular matrix enriched in collagen, glycoproteins, and proteoglycans. Pre-clinical studies have validated its compatibility with stromal/stem cells and its ability to support adipogenesis in vitro and in vivo in both small (murine) and large (porcine) subcutaneous implant models. Furthermore, Phase I safety clinical trials have injected decellularized human adipose tissue scaffolds in human volunteers without incident for periods of up to 127 days. This commentary takes an opinionated look at the under-appreciated but potential benefits of obesity as an increasingly available biomaterial resource.
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Affiliation(s)
- Daniel J. Hayes
- Department of Biomedical Engineering, Pennsylvania State University, State College, PA, USA
| | - Jeffrey M Gimble
- Obatala Sciences Inc., New Orleans, LA, USA,Corresponding author
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10
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Berntsen L, Forghani A, Hayes DJ. Mesenchymal Stem Cell Sheets for Engineering of the Tendon-Bone Interface. Tissue Eng Part A 2022; 28:341-352. [PMID: 34476994 PMCID: PMC9057909 DOI: 10.1089/ten.tea.2021.0072] [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: 04/08/2021] [Accepted: 08/25/2021] [Indexed: 11/12/2022] Open
Abstract
Failure to regenerate the gradient tendon-bone interface of the enthesis results in poor clinical outcomes for surgical repair. The goal of this study was to evaluate the potential of composite cell sheets for engineering of the tendon-bone interface to improve regeneration of the functionally graded tissue. We hypothesize that stacking cell sheets at early stages of differentiation into tenogenic and osteogenic progenitors will create a composite structure with integrated layers. Cell sheets were fabricated on methyl cellulose and poly(N-isopropylacrylamide) thermally reversible polymers with human adipose-derived stem cells and differentiated into progenitors of tendon and bone with chemical induction media. Tenogenic and osteogenic cell sheets were stacked, and the engineered tendon-bone interface (TM-OM) was characterized in vitro in comparison to stacked cell sheet controls cultured in basal growth medium (GM-GM), osteogenic medium (OM-OM), and tenogenic medium (TM-TM). Samples were characterized by histology, quantitative real-time polymerase chain reaction, and immunofluorescent staining for markers of tendon, fibrocartilage, and bone including mineralization, scleraxis, tenomodulin, COL2, COLX, RUNX2, osteonectin, and osterix. After 1 week co-culture in basal growth medium, TM-OM cell sheets formed a tissue construct with integrated layers expressing markers of tendon, mineralized fibrocartilage, and bone with a spatial gradient in RUNX2 expression. Tenogenic cell sheets had increased expression of scleraxis and tenomodulin. Osteogenic cell sheets exhibited mineralization 1 week after stacking and upregulation of osterix and osteonectin. Additionally, in the engineered interface, there was significantly increased gene expression of IHH and COLX, indicative of endochondral ossification. These results highlight the potential for composite cell sheets fabricated with adipose-derived stem cells for engineering of the tendon-bone interface. Impact statement This study presents a method for fabrication of the tendon-bone interface using stacked cell sheets of tenogenic and osteogenic progenitors differentiated from human adipose-derived mesenchymal stem cells, resulting in a composite structure expressing markers of tendon, mineralized fibrocartilage, and bone. This work is an important step toward regeneration of the biological gradient of the enthesis and demonstrates the potential for engineering complex tissue interfaces from a single autologous cell source to facilitate clinical translation.
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Affiliation(s)
- Lisa Berntsen
- Department of Biomedical Engineering, Pennsylvania State University, University Park, Pennsylvania, USA
| | - Anoosha Forghani
- Department of Biomedical Engineering, Pennsylvania State University, University Park, Pennsylvania, USA
| | - Daniel J Hayes
- Department of Biomedical Engineering, Pennsylvania State University, University Park, Pennsylvania, USA
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11
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Arrizabalaga JH, Casey JS, Becca JC, Liu Y, Jensen L, Hayes DJ. Development of Magnetic Nanoparticles for the Intracellular Delivery of miR-148b in Non-Small Cell Lung Cancer. Biomedical Engineering Advances 2022. [DOI: 10.1016/j.bea.2022.100031] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
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12
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Celik N, Kim MH, Hayes DJ, Ozbolat IT. miRNA induced co-differentiation and cross-talk of adipose tissue-derived progenitor cells for 3D heterotypic pre-vascularized bone formation. Biofabrication 2021; 13:10.1088/1758-5090/ac23ae. [PMID: 34479220 PMCID: PMC8596330 DOI: 10.1088/1758-5090/ac23ae] [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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2021] [Accepted: 09/03/2021] [Indexed: 11/12/2022]
Abstract
Engineered bone grafts require a vascular network to supply cells with oxygen, nutrients and remove waste. Using heterotypic mature cells to create these graftsin vivohas resulted in limited cell density, ectopic tissue formation and disorganized tissue. Despite evidence that progenitor cell aggregates, such as progenitor spheroids, are a potential candidate for fabrication of native-like pre-vascularized bone tissue, the factors dictating progenitor co-differentiation to create heterotypic pre-vascularized bone tissue remains poorly understood. In this study, we examined a three-dimensional heterotypic pre-vascularized bone tissue model, using osteogenic and endotheliogenic progenitor spheroids induced by miR-148b and miR-210 mimic transfection, respectively. Spheroids made of transfected cells were assembled into heterotypic structures to determine the impact on co-differentiation as a function of micro-RNA (miRNA) mimic treatment group and induction time. Our results demonstrated that miRNAs supported the differentiation in heterotypic structures, and that developing heterotypic structures is determined in part by progenitor maturity, as confirmed by gene and protein markers of osteogenic and endotheliogenic differentiation and the mineralization assay. As a proof of concept, miRNA-transfected spheroids were also bioprinted using aspiration-assisted bioprinting and organized into hollow structures to mimic the Haversian canal. Overall, the presented approach could be useful in fabrication of vascularized bone tissue using spheroids as building blocks.
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Affiliation(s)
- Nazmiye Celik
- Department of Engineering Science and Mechanics, Pennsylvania State University, 212 Earth-Engineering Sciences Bldg., University Park, PA 16802, United States of America
- The Huck Institutes of the Life Sciences, Penn State University, University Park, PA 16802, United States of America
| | - Myoung Hwan Kim
- The Huck Institutes of the Life Sciences, Penn State University, University Park, PA 16802, United States of America
- Department of Biomedical Engineering, Pennsylvania State University, Chemical and Biomedical Engineering Bldg., University Park, PA 16802, United States of America
| | - Daniel J Hayes
- The Huck Institutes of the Life Sciences, Penn State University, University Park, PA 16802, United States of America
- Department of Biomedical Engineering, Pennsylvania State University, Chemical and Biomedical Engineering Bldg., University Park, PA 16802, United States of America
- Materials Research Institute, Penn State University, University Park, PA 16802, United States of America
| | - Ibrahim T Ozbolat
- Department of Engineering Science and Mechanics, Pennsylvania State University, 212 Earth-Engineering Sciences Bldg., University Park, PA 16802, United States of America
- The Huck Institutes of the Life Sciences, Penn State University, University Park, PA 16802, United States of America
- Department of Biomedical Engineering, Pennsylvania State University, Chemical and Biomedical Engineering Bldg., University Park, PA 16802, United States of America
- Materials Research Institute, Penn State University, University Park, PA 16802, United States of America
- Department of Neurosurgery, Penn State College of Medicine, Hershey, PA 17033, United States of America
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13
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Li S, Liu Y, McCann J, Ravnic DJ, Gimble JM, Hayes DJ. Hybrid adipose graft materials synthesized from chemically modified adipose extracellular matrix. J Biomed Mater Res A 2021; 110:156-163. [PMID: 34263999 DOI: 10.1002/jbm.a.37273] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Revised: 06/24/2021] [Accepted: 07/07/2021] [Indexed: 12/17/2022]
Abstract
Decellularized extracellular matrix (ECM) from tissues is a promising biomaterial that can provide a complex 3D microenvironment capable of modulating cell response and tissue regeneration. In this study, we have integrated the decellularized thiolated adipose-derived ECM, at different concentrations, with polyethylene glycol (PEG) using Michael addition between thiol and acrylate moieties. The potential for this material to support adipogenic differentiation of human adipose-derived stem cells was evaluated by encapsulating cells in hydrogels with increasing concentrations of chemically modified ECM (mECM). Our results demonstrated a positive correlation between the ECM content in the hydrogels and cell proliferation, adipogenic marker expression, and lipid formation and accumulation. Furthermore, we have shown host cell infiltration and enhanced adipogenesis in vivo after implantation. These findings support the graft as a potential alternative for adipose tissue regeneration.
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Affiliation(s)
- Shue Li
- Department of Biomedical Engineering, The Pennsylvania State University, University Park, Pennsylvania, USA
| | - Yiming Liu
- Department of Biomedical Engineering, The Pennsylvania State University, University Park, Pennsylvania, USA
| | - Jacob McCann
- Department of Biomedical Engineering, The Pennsylvania State University, University Park, Pennsylvania, USA
| | - Dino J Ravnic
- Department of Surgery, Penn State Health Milton S. Hershey Medical Center, Hershey, Pennsylvania, USA
| | - Jeffrey M Gimble
- Obatala Sciences, Inc., Advanced Materials Research Institute, University of New Orleans, New Orleans, Louisiana, USA
| | - Daniel J Hayes
- Department of Biomedical Engineering, The Pennsylvania State University, University Park, Pennsylvania, USA.,Material Research Institute, The Pennsylvania State University, University Park, Pennsylvania, USA.,The Huck Institutes of the Life Sciences, The Pennsylvania State University, University Park, Pennsylvania, USA
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14
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Wei X, Hayes DJ, Fernandez I, Fraver S, Zhao J, Weiskittel A. Climate and atmospheric deposition drive the inter-annual variability and long-term trend of dissolved organic carbon flux in the conterminous United States. Sci Total Environ 2021; 771:145448. [PMID: 33736179 DOI: 10.1016/j.scitotenv.2021.145448] [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] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Revised: 01/19/2021] [Accepted: 01/23/2021] [Indexed: 06/12/2023]
Abstract
The lateral flux of dissolved organic carbon (DOC) from soils to inland waters and ultimately to the ocean represents a fundamental component of the global carbon cycle. To estimate the DOC flux, we developed an empirical terrestrial-aquatic DOC fluxes model (TAF-DOC). TAF-DOC incorporates various environmental factors (e.g., meteorology, sulfur, and nitrogen deposition) that to-date have not been comprehensively considered or well-represented in existing modeling frameworks. TAF-DOC was applied to estimate spatial-temporal patterns of DOC flux and potential fates across the conterminous United States during the 1985 to 2018 time period. Our results suggest that TAF-DOC successfully characterized spatial-temporal of DOC flux. As expected, the interannual pattern of DOC flux was strongly regulated by precipitation, but the long-term trend was significantly influenced by the rate of atmospheric wet sulfur deposition. From 1985 to 2018, TAF-DOC estimated DOC loading from terrestrial to aquatic ecosystems in the conterminous United States to be 33.5 ± 2.2 TgC per year, which was roughly 0.39-0.49% of total soil organic carbon stock estimates. The dominant fate of terrestrially-derived DOC was delivery to the coastal ocean in riverine export (41%), with another 21% buried in sediment and the remaining 12.8 ± 0.4 TgC per year (38%) returned to the atmosphere through outgassing from inland waters. Assuming the quantities of DOC sediment burial and export to the ocean as an annual sink of terrestrially-derived carbon, budget inventories and models that do not account for DOC flux in the conterminous United States will underestimate the net annual carbon sink by as much as 5.5-6.4%.
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Affiliation(s)
- Xinyuan Wei
- School of Forest Resources, University of Maine, Orono, ME 04469, USA; Environmental Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA.
| | - Daniel J Hayes
- School of Forest Resources, University of Maine, Orono, ME 04469, USA
| | - Ivan Fernandez
- School of Forest Resources, University of Maine, Orono, ME 04469, USA; Climate Change Institute, University of Maine, Orono, ME 04469, USA
| | - Shawn Fraver
- School of Forest Resources, University of Maine, Orono, ME 04469, USA
| | - Jianheng Zhao
- School of Forest Resources, University of Maine, Orono, ME 04469, USA
| | - Aaron Weiskittel
- School of Forest Resources, University of Maine, Orono, ME 04469, USA; Center for Research on Sustainable Forests, University of Maine, Orono, ME 04469, USA
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15
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Liu X, Cho SH, Armsworth PR, Hayes DJ. Where and When Carbon Storage can be Bought Cost Effectively from Private Forest Owners. Environ Manage 2021; 67:930-948. [PMID: 33555406 DOI: 10.1007/s00267-021-01427-4] [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] [Subscribe] [Scholar Register] [Received: 12/28/2019] [Accepted: 01/13/2021] [Indexed: 06/12/2023]
Abstract
The role of time in estimating the cost of forest carbon is often ignored in the literature, nor does the literature address the issues of where and when the purchase of forest carbon storage becomes socially beneficial. In our study, we identify the spatial and temporal allocations of forest carbon investments that are socially beneficial based on empirical analysis. We use the Central and Southern Appalachian region in the Eastern United States as a case study over three periods (i.e., 1992-2001, 2001-2006, and 2006-2011) that are roughly in line with moderate, upturn, and downturn market conditions. The areas from which it is socially beneficial to buy carbon storage are mainly in flat terrain and further away from urban boundaries, hence facing lower development pressure and lower urban net returns. These areas also have less urban land and more forestland. The mapping of carbon cost over the three market conditions in our case study also indicates that the socially beneficial carbon area shrinks as the opportunity cost increases when the real-estate market evolves from a moderately growing to a booming market. The socially beneficial carbon area shrinks further as the demand from urban development on forestland collapses when the real-estate market enters a downturn stage.
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Affiliation(s)
- Xiangping Liu
- Department of Agriculture Science, Texas State University, San Marcos, TX, USA.
| | - Seong-Hoon Cho
- Department of Agricultural and Resource Economics, University of Tennessee, Knoxville, TN, USA
| | - Paul R Armsworth
- Department of Ecology and Evolutionary Biology, University of Tennessee, Knoxville, TN, USA
| | - Daniel J Hayes
- School of Forest Resources, University of Maine, Orono, ME, USA
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16
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Frazier T, Williams C, Henderson M, Duplessis T, Rogers E, Wu X, Hamel K, Martin EC, Mohiuddin O, Shaik S, Devireddy R, Rowan BG, Hayes DJ, Gimble JM. Breast Cancer Reconstruction: Design Criteria for a Humanized Microphysiological System. Tissue Eng Part A 2021; 27:479-488. [PMID: 33528293 DOI: 10.1089/ten.tea.2020.0372] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
International regulatory agencies such as the Food and Drug Administration have mandated that the scientific community develop humanized microphysiological systems (MPS) as an in vitro alternative to animal models in the near future. While the breast cancer research community has long appreciated the importance of three-dimensional growth dynamics in their experimental models, there are remaining obstacles preventing a full conversion to humanized MPS for drug discovery and pathophysiological studies. This perspective evaluates the current status of human tissue-derived cells and scaffolds as building blocks for an "idealized" breast cancer MPS based on bioengineering design principles. It considers the utility of adipose tissue as a potential source of endothelial, lymphohematopoietic, and stromal cells for the support of breast cancer epithelial cells. The relative merits of potential MPS scaffolds derived from adipose tissue, blood components, and synthetic biomaterials is evaluated relative to the current "gold standard" material, Matrigel, a murine chondrosarcoma-derived basement membrane-enriched hydrogel. The advantages and limitations of a humanized breast cancer MPS are discussed in the context of in-process and destructive read-out assays. Impact statement Regulatory authorities have highlighted microphysiological systems as an emerging tool in breast cancer research. This has been led by calls for more predictive human models and reduced animal experimentation. This perspective describes how human-derived cells, extracellular matrices, and hydrogels will provide the building blocks to create breast cancer models that accurately reflect diversity at multiple levels, that is, patient ethnicity, pathophysiology, and metabolic status.
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Affiliation(s)
| | - Christopher Williams
- Division of Basic Pharmaceutical Sciences, Xavier University of Louisiana, New Orleans, Louisiana, USA
| | | | - Tamika Duplessis
- Department of Physical Sciences, Delgado Community College, New Orleans, Louisiana, USA
| | - Emma Rogers
- Obatala Sciences, Inc., New Orleans, Louisiana, USA
| | - Xiying Wu
- Obatala Sciences, Inc., New Orleans, Louisiana, USA
| | - Katie Hamel
- Obatala Sciences, Inc., New Orleans, Louisiana, USA.,Department of Biological and Agricultural Engineering, Louisiana State University, Baton Rouge, Louisiana, USA
| | - Elizabeth C Martin
- Department of Biological and Agricultural Engineering, Louisiana State University, Baton Rouge, Louisiana, USA
| | - Omair Mohiuddin
- Panjwani Center for Molecular Medicine and Drug Research, International Center for Chemical and Biological Science, University of Karachi, Karachi, Pakistan
| | - Shahensha Shaik
- Cell and Molecular Biology Core Laboratory, Xavier University of Louisiana, New Orleans, Louisiana, USA
| | - Ram Devireddy
- Department of Mechanical Engineering, Louisiana State University, New Orleans, Louisiana, USA
| | - Brian G Rowan
- Department of Structural and Cellular Biology, Tulane University School of Medicine, New Orleans, Louisiana, USA
| | - Daniel J Hayes
- Department of Biomedical Engineering, Pennsylvania State University, State College, Pennsylvania, USA
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17
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Mohiuddin OA, Motherwell JM, Rogers E, Bratton MR, Zhang Q, Wang G, Bunnell B, Hayes DJ, Gimble JM. Characterization and Proteomic Analysis of Decellularized Adipose Tissue Hydrogels Derived from Lean and Overweight/Obese Human Donors. ACTA ACUST UNITED AC 2020; 4:e2000124. [PMID: 32914579 DOI: 10.1002/adbi.202000124] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [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: 05/07/2020] [Revised: 07/28/2020] [Indexed: 12/19/2022]
Abstract
While decellularized adipose tissue (DAT) has potential as an "off-the-shelf" biomaterial product for regenerative medicine, it remains to be determined if donor-source body mass index (BMI) impacts the functionality of DAT. This study set out to comparatively characterize lean versus overweight/obese-donor derived DAT hydrogel based on proteome and to analyze their respective effects on adipose stromal/stem cell (ASC) viability, and differentiation in vitro. Decellularized adipose tissue from lean (lDAT) and overweight/obese (oDAT) donors is produced and characterized. Variability in the fibril microstructures is found, with dense fibrotic fiber clusters and large pore area uniquely present in the oDAT samples. Proteomic analysis reveals that lDAT contains a greater proportion of enriched extracellular proteins and a smaller proportion of enriched intracellular proteins relative to oDAT. Biocompatibility studies show that ASCs cultured in lDAT and oDAT hydrogels remain viable. The adipogenic and osteogenic differentiation capability of ASCs seeded in lDAT and oDAT hydrogels is confirmed by an upregulation in marker gene expression and phenotypic analysis. In conclusion, this study establishes that DAT hydrogels derived from lean and overweight/obese adipose donors present similar physicochemical profiles with some distinctive features while comparably supporting the viability and adipogenic differentiation of ASCs in vitro.
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Affiliation(s)
- Omair A Mohiuddin
- Center for Stem Cell Research and Regenerative Medicine, Tulane University School of Medicine, New Orleans, LA, 70112, USA
| | - Jessica M Motherwell
- Center for Stem Cell Research and Regenerative Medicine, Tulane University School of Medicine, New Orleans, LA, 70112, USA
| | - Emma Rogers
- Department of Biomedical Engineering, Tulane University, New Orleans, LA, 70112, USA
| | | | - Qiang Zhang
- Department of Chemistry, Xavier University of Louisiana, New Orleans, LA, 70125, USA
| | - Guangdi Wang
- Department of Chemistry, Xavier University of Louisiana, New Orleans, LA, 70125, USA
| | - Bruce Bunnell
- Center for Stem Cell Research and Regenerative Medicine, Tulane University School of Medicine, New Orleans, LA, 70112, USA
| | - Daniel J Hayes
- Department of Biomedical Engineering, Pennsylvania State University, State College, PA, 16802, USA
| | - Jeffrey M Gimble
- Center for Stem Cell Research and Regenerative Medicine, Tulane University School of Medicine, New Orleans, LA, 70112, USA
- LaCell LLC and Obatala Sciences Inc., New Orleans, LA, 70148, USA
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18
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Casey JS, Arrizabalaga JH, Abu-Laban M, Becca JC, Rose BJ, Strickland KT, Bursavich JB, McCann JS, Pacheco CN, Jensen L, Attaluri A, Hayes DJ. Alternating magnetic field mediated release of fluorophores from magnetic nanoparticles by hysteretic heating. J Colloid Interface Sci 2020; 571:348-355. [PMID: 32209489 PMCID: PMC7570445 DOI: 10.1016/j.jcis.2020.03.056] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2019] [Revised: 02/24/2020] [Accepted: 03/16/2020] [Indexed: 01/05/2023]
Abstract
This study explores the use of differential heating of magnetic nanoparticles with different sizes and compositions (MFe2O4 (M = Fe, Co)) for heteroplexed temporal controlled release of conjugated fluorophores from the surface of nanoparticles. By exploiting these differences, we were able to control the amount of hysteretic heating occurring with the distinct sets of magnetic nanoparticles using the same applied alternating magnetic field radio frequency (AMF-RF). Using thermally labile retro-Diels-Alder linkers conjugated to the surface of nanoparticles, the fluorescent payload from the different nanoparticles disengaged when sufficient energy was locally generated during hysteretic heating. 1H, 13C NMR, ESI-MS, and SIMS characterized the thermally responsive fluorescent cycloadducts used in this study; the Diels Alder cycloadducts were modeled using density functional theory (DFT) computations. The localized point heating of the different nanoparticle compositions drove the retro-Diels-Alder reaction at different times resulting in higher release rates of fluorophores from the CoFe2O4 compared to the Fe3O4 nanoparticles.
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Affiliation(s)
- Jonathan S Casey
- The Department of Biomedical Engineering, The Pennsylvania State University, University Park, PA 16802, United States
| | - Julien H Arrizabalaga
- The Department of Biomedical Engineering, The Pennsylvania State University, University Park, PA 16802, United States
| | - Mohammad Abu-Laban
- Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, United States
| | - Jeffrey C Becca
- The Department of Chemistry, The Pennsylvania State University, University Park, PA 16802, United States
| | - Benjamin J Rose
- The Department of Biomedical Engineering, The Pennsylvania State University, University Park, PA 16802, United States
| | - Kevin T Strickland
- The Department of Biomedical Engineering, The Pennsylvania State University, University Park, PA 16802, United States
| | - Jacob B Bursavich
- The Department of Agricultural and Biological Engineering, Louisiana State University, Baton Rouge, LA 70803, United States
| | - Jacob S McCann
- The Department of Biochemistry and Molecular Biology, The Pennsylvania State University, University Park, PA 16802, United States
| | - Carlos N Pacheco
- The Department of Chemistry, The Pennsylvania State University, University Park, PA 16802, United States; The NMR Facility, The Pennsylvania State University, University Park, PA 16802, United States
| | - Lasse Jensen
- The Department of Chemistry, The Pennsylvania State University, University Park, PA 16802, United States
| | - Anilchandra Attaluri
- The Department of Mechanical Engineering, The Pennsylvania State University, Harrisburg, PA 17057, United States
| | - Daniel J Hayes
- The Department of Biomedical Engineering, The Pennsylvania State University, University Park, PA 16802, United States; Materials Research Institute, Millennium Science Complex, The Pennsylvania State University, University Park, PA 16802, United States; The Huck Institute of the Life Sciences, Millennium Science Complex, The Pennsylvania State University, University Park, PA 16802, United States.
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19
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Forghani A, Koduru SV, Chen C, Leberfinger AN, Ravnic DJ, Hayes DJ. Differentiation of Adipose Tissue-Derived CD34+/CD31- Cells into Endothelial Cells In Vitro. Regen Eng Transl Med 2020; 6:101-110. [PMID: 33344757 PMCID: PMC7747864 DOI: 10.1007/s40883-019-00093-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2018] [Accepted: 02/07/2019] [Indexed: 12/18/2022]
Abstract
In this study, CD34+/CD31- progenitor cells were isolated from the stromal vascular fraction (SVF) of adipose tissue using magnetic activated cell sorting. The endothelial differentiation capability of these cells in vitro was evaluated by culturing them in vascular endothelial growth factor (VEGF) induced medium for 14 days. Viability, proliferation, differentiation and tube formation of these cells were evaluated. Cell viability study revealed that both undifferentiated and endothelial differentiated cells remained healthy for 14 days. However, the proliferation rate was higher in undifferentiated cells compared to endothelial differentiated ones. Upregulation of endothelial characteristic genes (Von Willebrand Factor (vWF) and VE Cadherin) was observed in 2D culture. However, PECAM (CD31) was only found to be upregulated after the cells had formed tube-like structures in 3D Matrigel culture. These results indicate that adipose derived CD34+/CD31- cells when cultured in VEGF induced medium, are capable differentiation into endothelial-like lineages. Tube formation of the cells started 3h after seeding the cells on Matrigel and formed more stable and connected network 24 h post seeding in presence of VEGF.
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Affiliation(s)
- Anoosha Forghani
- Department of Biomedical Engineering, Millennium Science Complex, Pennsylvania State University, University Park, Pennsylvania, USA
| | - Srinivas V Koduru
- Department of Surgery, College of Medicine, Penn State Health Milton S. Hershey Medical Center, Hershey, Pennsylvania, USA
| | - Cong Chen
- Department of Biomedical Engineering, Millennium Science Complex, Pennsylvania State University, University Park, Pennsylvania, USA
| | - Ashley N Leberfinger
- Department of Surgery, College of Medicine, Penn State Health Milton S. Hershey Medical Center, Hershey, Pennsylvania, USA
| | - Dino J Ravnic
- Department of Surgery, College of Medicine, Penn State Health Milton S. Hershey Medical Center, Hershey, Pennsylvania, USA
| | - Daniel J Hayes
- Department of Biomedical Engineering, Millennium Science Complex, Pennsylvania State University, University Park, Pennsylvania, USA
- Materials Research Institute, Materials Characterization Lab, Millennium Science Complex, Pennsylvania State University, University Park, Pennsylvania, USA
- The Huck Institute of the Life Sciences, Millennium Science Complex, Pennsylvania State University, University Park, Pennsylvania, USA
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20
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Abu-Laban M, Hamal P, Arrizabalaga JH, Forghani A, Dikkumbura AS, Kumal RR, Haber LH, Hayes DJ. Combinatorial Delivery of miRNA-Nanoparticle Conjugates in Human Adipose Stem Cells for Amplified Osteogenesis. Small 2019; 15:e1902864. [PMID: 31725198 PMCID: PMC8530457 DOI: 10.1002/smll.201902864] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [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: 06/02/2019] [Revised: 10/15/2019] [Indexed: 05/25/2023]
Abstract
It is becoming more apparent in tissue engineering applications that fine temporal control of multiple therapeutics is desirable to modulate progenitor cell fate and function. Herein, the independent temporal control of the co-delivery of miR-148b and miR-21 mimic plasmonic nanoparticle conjugates to induce osteogenic differentiation of human adipose stem cells (hASCs), in a de novo fashion, is described. By applying a thermally labile retro-Diels-Alder caging and linkage chemistry, these miRNAs can be triggered to de-cage serially with discrete control of activation times. The method relies on illumination of the nanoparticles at their resonant wavelengths to generate sufficient local heating and trigger the untethering of the Diels-Alder cycloadduct. Characterization of the photothermal release using fluorophore-tagged miRNA mimics in vitro is carried out with fluorescence measurements, second harmonic generation, and confocal imaging. Osteogenesis of hASCs from the sequential co-delivery of miR-21 and miR-148b mimics is assessed using xylenol orange and alizarin red staining of deposited minerals, and quantitative polymerase chain reaction for gene expression of osteogenic markers. The results demonstrate that sequential miRNA mimic activation results in upregulation of osteogenic markers and mineralization relative to miR-148b alone, and co-activation of miR-148b and miR-21 at the same time.
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Affiliation(s)
- Mohammad Abu-Laban
- The Department of Biomedical Engineering, The Pennsylvania State University, University Park, PA, 16802, USA
| | - Prakash Hamal
- The Department of Chemistry, Louisiana State University, Baton Rouge, LA, 70803, USA
| | - Julien H Arrizabalaga
- The Department of Biomedical Engineering, The Pennsylvania State University, University Park, PA, 16802, USA
| | - Anoosha Forghani
- The Department of Biomedical Engineering, The Pennsylvania State University, University Park, PA, 16802, USA
| | - Asela S Dikkumbura
- The Department of Chemistry, Louisiana State University, Baton Rouge, LA, 70803, USA
| | - Raju R Kumal
- John and Willie Leone Family Department of Energy and Mineral Engineering, Pennsylvania State University, University Park, PA, 16802, USA
| | - Louis H Haber
- The Department of Chemistry, Louisiana State University, Baton Rouge, LA, 70803, USA
| | - Daniel J Hayes
- The Department of Biomedical Engineering, The Pennsylvania State University, University Park, PA, 16802, USA
- Materials Research Institute, Millennium Science Complex, Pennsylvania State University, University Park, PA, 16802, USA
- The Huck Institute of the Life Sciences, Millennium Science Complex, Pennsylvania State University, University Park, PA, 16802, USA
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21
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Liu X, Cho SH, Hayes DJ, Armsworth PR. Potential efficiency gains in payment programs from resolving spatial and temporal heterogeneity in the cost of supplying forest carbon. J Environ Manage 2019; 250:109421. [PMID: 31476518 DOI: 10.1016/j.jenvman.2019.109421] [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] [Subscribe] [Scholar Register] [Received: 12/18/2018] [Revised: 08/15/2019] [Accepted: 08/16/2019] [Indexed: 06/10/2023]
Abstract
The environmental benefits and costs of conservation policies often vary over space and through time. Accounting for this spatial and temporal heterogeneity has important implications for the potential cost effectiveness of different payment program designs. In this study, we examine the cost efficiency gain from spatial and temporal targeting in payment designs for forest carbon storage in the Central and Southern Appalachian Mountains in the Eastern United States. We run a forest land change model and a carbon simulation model utilizing a panel data on forest land and its competing uses, economic returns, and spatial characteristics for each 1 km2 grid cells in 1992, 2001, 2006 and 2011. A time- and space-specific carbon cost for each individual 1 km2 grid cell is calculated that captures the spatial and temporal heterogeneity in carbon cost efficiency. From there, we compare carbon cost efficiency levels of various payment designs that allow for different degrees of spatial and temporal flexibility. We find that 1) spatial targeting improves carbon cost efficiency, and this efficiency gain is larger as payments become more narrowly targeted, 2) this carbon efficiency gain is present in all market conditions, but is largest in a moderately growing market and smallest in a downturn market, 3) accounting for temporal heterogeneity results in even larger carbon efficiency gains, almost double those from spatial targeting. Just as policies that enable spatial targeting (e.g., auctions) increase cost efficiency savings, so too will policy mechanisms that emphasize budget flexibility through time. These could include utilizing loans or flexible conservation financing, or allowing movement across budgeting categories within a given time period.
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Affiliation(s)
- Xiangping Liu
- Department of Agriculture, Texas State University, San Marcos, TX, USA.
| | - Seong-Hoon Cho
- Department of Agricultural and Resource Economics, University of Tennessee, Knoxville, TN, USA.
| | - Daniel J Hayes
- School of Forest Resources, University of Maine, Orono, ME, USA.
| | - Paul R Armsworth
- Department of Ecology and Evolutionary Biology, University of Tennessee, Knoxville, TN, USA.
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22
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Mohiuddin OA, Campbell B, Poche JN, Ma M, Rogers E, Gaupp D, Harrison MAA, Bunnell BA, Hayes DJ, Gimble JM. Decellularized Adipose Tissue Hydrogel Promotes Bone Regeneration in Critical-Sized Mouse Femoral Defect Model. Front Bioeng Biotechnol 2019; 7:211. [PMID: 31552237 PMCID: PMC6743019 DOI: 10.3389/fbioe.2019.00211] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [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: 07/11/2019] [Accepted: 08/19/2019] [Indexed: 12/18/2022] Open
Abstract
Critical-sized bone defects fail to heal and often cause non-union. Standard treatments employ autologous bone grafting, which can cause donor tissue loss/pain. Although several scaffold types can enhance bone regeneration, multiple factors limit their level of success. To address this issue, this study evaluated a novel decellularized human adipose tissue (DAT) hydrogel as an alternative. In this study, DAT hydrogel alone, or in combination with adipose-derived stromal/stem cells (ASC), osteo-induced ASCs (OIASC), and hydroxyapatite were tested for their ability to mediate repair of a critical-sized (3 mm) femoral defect created in C57BL/6 mice. Micro-computed tomography results showed that all DAT hydrogel treated groups significantly enhanced bone regeneration, with OIASC + hydroxyapatite treated group displaying the most robust bone regeneration. Histological analyses revealed that all treatments resulted in significantly higher tissue areas with the relative mineralized tissue area significantly increased at 12 weeks; however, cartilaginous content was lowest among treatment groups with OIASC. Immunohistochemical analyses showed that DAT hydrogel enhanced collagen I and osteopontin expression, while the addition of OIASCs to the hydrogel reduced collagen II levels. Thus, DAT hydrogel promotes bone regeneration in a critical-sized femoral defect model that is further enhanced in the presence of OIASCs and hydroxyapatite.
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Affiliation(s)
- Omair A Mohiuddin
- Center for Stem Cell Research and Regenerative Medicine, Tulane University School of Medicine, New Orleans, LA, United States
| | - Brett Campbell
- School of Medicine, Tulane University, New Orleans, LA, United States
| | - J Nick Poche
- School of Medicine, Louisiana State University, New Orleans, LA, United States
| | - Michelle Ma
- Center for Stem Cell Research and Regenerative Medicine, Tulane University School of Medicine, New Orleans, LA, United States.,Obatala Sciences, New Orleans, LA, United States
| | - Emma Rogers
- Department of Biomedical Engineering, Tulane University, New Orleans, LA, United States
| | - Dina Gaupp
- Center for Stem Cell Research and Regenerative Medicine, Tulane University School of Medicine, New Orleans, LA, United States
| | - Mark A A Harrison
- Center for Stem Cell Research and Regenerative Medicine, Tulane University School of Medicine, New Orleans, LA, United States
| | - Bruce A Bunnell
- Center for Stem Cell Research and Regenerative Medicine, Tulane University School of Medicine, New Orleans, LA, United States
| | - Daniel J Hayes
- Department of Biomedical Engineering, Pennsylvania State University, State College, PA, United States
| | - Jeffrey M Gimble
- Center for Stem Cell Research and Regenerative Medicine, Tulane University School of Medicine, New Orleans, LA, United States.,LaCell LLC, New Orleans, LA, United States
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23
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Shaik S, Martin EC, Hayes DJ, Gimble JM, Devireddy RV. Transcriptomic Profiling of Adipose Derived Stem Cells Undergoing Osteogenesis by RNA-Seq. Sci Rep 2019; 9:11800. [PMID: 31409848 PMCID: PMC6692320 DOI: 10.1038/s41598-019-48089-1] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2019] [Accepted: 07/25/2019] [Indexed: 02/06/2023] Open
Abstract
Adipose-derived stromal/stem cells (ASCs) are multipotent in nature that can be differentiated into various cells lineages such as adipogenic, osteogenic, and chondrogenic. The commitment of a cell to differentiate into a particular lineage is regulated by the interplay between various intracellular pathways and their resultant secretome. Similarly, the interactions of cells with the extracellular matrix (ECM) and the ECM bound growth factors instigate several signal transducing events that ultimately determine ASC differentiation. In this study, RNA-sequencing (RNA-Seq) was performed to identify the transcriptome profile of osteogenic induced ASCs to understand the associated genotype changes. Gene ontology (GO) functional annotations analysis using Database for Annotation Visualization and Integrated Discovery (DAVID) bioinformatics resources on the differentially expressed genes demonstrated the enrichment of pathways mainly associated with ECM organization and angiogenesis. We, therefore, studied the expression of genes coding for matrisome proteins (glycoproteins, collagens, proteoglycans, ECM-affiliated, regulators, and secreted factors) and ECM remodeling enzymes (MMPs, integrins, ADAMTSs) and the expression of angiogenic markers during the osteogenesis of ASCs. The upregulation of several pro-angiogenic ELR+ chemokines and other angiogenic inducers during osteogenesis indicates the potential role of the secretome from differentiating ASCs in the vascular development and its integration with the bone tissue. Furthermore, the increased expression of regulatory genes such as CTNNB1, TGBR2, JUN, FOS, GLI3, and MAPK3 involved in the WNT, TGF-β, JNK, HedgeHog and ERK1/2 pathways suggests the regulation of osteogenesis through interplay between these pathways. The RNA-Seq data was also validated by performing QPCR on selected up- and down-regulated genes (COL10A1, COL11A1, FBLN, FERMT1, FN1, FOXF1, LAMA3, LAMA4, LAMB1, IGF1, WNT10B, MMP1, MMP3, MMP16, ADAMTS6, and ADAMTS14).
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Affiliation(s)
- Shahensha Shaik
- Bioengineering Laboratory, Department of Mechanical Engineering, Louisiana State University, Baton Rouge, LA, USA
| | - Elizabeth C Martin
- Department of Biological and Agricultural Engineering, Louisiana State University, Baton Rouge, LA, USA
| | - Daniel J Hayes
- Department of Biomedical Engineering, Pennsylvania State University, University Park, PA, USA
| | - Jeffrey M Gimble
- La Cell LLC and Center for Stem Cell Research & Regenerative Medicine and Departments of Medicine, Structural & Cellular Biology, and Surgery, Tulane University School of Medicine, New Orleans, LA, USA
| | - Ram V Devireddy
- Bioengineering Laboratory, Department of Mechanical Engineering, Louisiana State University, Baton Rouge, LA, USA.
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24
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Li S, Poche JN, Liu Y, Scherr T, McCann J, Forghani A, Smoak M, Muir M, Berntsen L, Chen C, Ravnic DJ, Gimble J, Hayes DJ. Hybrid Synthetic-Biological Hydrogel System for Adipose Tissue Regeneration. Macromol Biosci 2018; 18:e1800122. [PMID: 30247815 DOI: 10.1002/mabi.201800122] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2018] [Revised: 08/12/2018] [Indexed: 01/28/2023]
Abstract
Hydrogels are promising scaffolds for adipose tissue regeneration. Currently, the incorporation of bioactive molecules in hydrogel system is used, which can increase the cell proliferation rate or improve adipogenic differentiation performance of stromal stem cells but often suffers from high expense or cytotoxicity because of light/thermal curing used for polymerization. In this study, decellularized adipose tissue is incorporated, at varying concentrations, with a thiol-acrylate fraction that is then polymerized to produce hydrogels via a Michael addition reaction. The results reveal that the major component of isolated adipose-derived extracellular matrix (ECM) is Collagen I. Mechanical properties of ECM polyethylene glycol (PEG) are not negatively affected by the incorporation of ECM. Additionally, human adipose-derived stem cells (hASCs) are encapsulated in ECM PEG hydrogel with ECM concentrations varying from 0% to 1%. The results indicate that hASCs maintained the highest viability and proliferation rate in 1% ECM PEG hydrogel with most lipids formation when cultured in adipogenic conditions. Furthermore, more adipose regeneration is observed in 1% ECM group with in vivo study by Day 14 compared to other ECM PEG hydrogels with lower ECM content. Taken together, these findings suggest the ECM PEG hydrogel is a promising substitute for adipose tissue regeneration applications.
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Affiliation(s)
- Shue Li
- Department of Stomatology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China.,Department of Biomedical Engineering, Pennsylvania State University, Millennium Science Complex, University Park, PA, 16802, USA
| | | | - Yiming Liu
- Department of Biomedical Engineering, Pennsylvania State University, Millennium Science Complex, University Park, PA, 16802, USA
| | - Thomas Scherr
- Department of Chemistry, Vanderbilt University, Nashville, TN, 37235, USA
| | - Jacob McCann
- Department of Biomedical Engineering, Pennsylvania State University, Millennium Science Complex, University Park, PA, 16802, USA
| | - Anoosha Forghani
- Department of Biomedical Engineering, Pennsylvania State University, Millennium Science Complex, University Park, PA, 16802, USA
| | - Mollie Smoak
- Department of Bioengineering, Rice University, Houston, TX, 77030, USA
| | - Mitchell Muir
- Department of Biological Engineering, Louisiana State University, Baton Rouge, LA, 70803, USA
| | - Lisa Berntsen
- Department of Biomedical Engineering, Pennsylvania State University, Millennium Science Complex, University Park, PA, 16802, USA
| | - Cong Chen
- Department of Biomedical Engineering, Pennsylvania State University, Millennium Science Complex, University Park, PA, 16802, USA
| | - Dino J Ravnic
- Division of Plastic Surgery, Department of Surgery, PennState Health Milton S. Hershey Medical Center, Hershey, PA, 17033, USA
| | - Jeffrey Gimble
- Department of Medicine and Surgery, School of Medicine, Tulane University, New Orleans, LA, 70112, USA
| | - Daniel J Hayes
- Department of Biomedical Engineering, Pennsylvania State University, Millennium Science Complex, University Park, PA, 16802, USA
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25
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Kumal RR, Abu-Laban M, Hamal P, Kruger B, Smith HT, Hayes DJ, Haber LH. Near-Infrared Photothermal Release of siRNA from the Surface of Colloidal Gold-Silver-Gold Core-Shell-Shell Nanoparticles Studied with Second-Harmonic Generation. J Phys Chem C Nanomater Interfaces 2018; 122:19699-19704. [PMID: 30637038 PMCID: PMC6326572 DOI: 10.1021/acs.jpcc.8b06117] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Photothermal release of oligonucleotides from the surface of plasmonic nanoparticles represents a promising platform for spatiotemporal controlled drug delivery. Here we demonstrate the use of novel gold-silver-gold core-shell-shell (CSS) nanoparticles to study the photothermal cleaving and release of micro-RNA (miRNA) mimics or small interfering RNA (siRNA) under nearinfrared (NIR) irradiation. The furan-maleimide-based Diels-Alder adduct cleaves thermally above 60 °C and is used to bind siRNA to the colloidal nanoparticle surface in water. We investigate the photothermal cleaving kinetics of siRNA under different NIR laser powers using surface-sensitive time-dependent second-harmonic generation (SHG) spectroscopy. The photothermal release of siRNA from the surface of CSS nanoparticles is significantly higher than that from the surface of gold nanoparticles (GNPs) under similar experimental conditions. These results demonstrate that plasmonic CSS nanoparticles with photothermal cleaving linkers have important potential applications for nanoparticle-based NIR-mediated drug-delivery systems.
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Affiliation(s)
- Raju R. Kumal
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, United States
| | - Mohammad Abu-Laban
- Department of Biomedical Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
| | - Prakash Hamal
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, United States
| | - Blake Kruger
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, United States
| | - Holden T. Smith
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, United States
| | - Daniel J. Hayes
- Department of Biomedical Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
| | - Louis H. Haber
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, United States
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26
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Abu-Laban M, Kumal RR, Casey J, Becca J, LaMaster D, Pacheco CN, Sykes DG, Jensen L, Haber LH, Hayes DJ. Comparison of thermally actuated retro-diels-alder release groups for nanoparticle based nucleic acid delivery. J Colloid Interface Sci 2018; 526:312-321. [PMID: 29751265 DOI: 10.1016/j.jcis.2018.04.085] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [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: 02/15/2018] [Revised: 04/03/2018] [Accepted: 04/23/2018] [Indexed: 12/18/2022]
Abstract
The present study explores alternate pericyclic chemistries for tethering amine-terminal biomolecules onto silver nanoparticles. Employing the versatile tool of the retro-Diels-Alder (rDA) reaction, three thermally-labile cycloadducts are constructed that cleave at variable temperature ranges. While the reaction between furan and maleimide has widely been reported, the current study also evaluates the reverse reaction kinetics between thiophene-maleimide, and pyrrole-maleimide cycloadducts. Density Functional Theorem (DFT) calculations used to model and plan the experiments, predict energy barriers for the thiophene-maleimide reverse reaction to be greatest, and the pyrrole-maleimide barriers the lowest. Based on the computational analyses, it is projected that the cycloreversion rate would occur slowest with the thiophene, followed by furan, and finally pyrrole would yield the promptest release. These thermally-responsive linkers, characterized by Electrospray Ionization Mass Spectrometry, 1H and 13C NMR, are thiol-linked to silver nanoparticles and conjugate single stranded siRNA mimics with 5' fluorescein tag. Second harmonic generation spectroscopy (SHG) and fluorescence spectroscopy are used to measure release and rate of release. The SHG decay constants and fluorescence release profiles obtained for the three rDA reactions confirm the trends obtained from the DFT computations.
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Affiliation(s)
- Mohammad Abu-Laban
- The Department of Biomedical Engineering, The Pennsylvania State University, University Park, PA 16802, United States.
| | - Raju R Kumal
- The Department of Chemistry, Louisiana State University, Baton Rouge, LA 70803, United States.
| | - Jonathan Casey
- The Department of Biomedical Engineering, The Pennsylvania State University, University Park, PA 16802, United States.
| | - Jeff Becca
- The Department of Chemistry, The Pennsylvania State University, University Park, PA 16802, United States.
| | - Daniel LaMaster
- The Department of Chemistry, Louisiana State University, Baton Rouge, LA 70803, United States.
| | - Carlos N Pacheco
- The Department of Chemistry, The Pennsylvania State University, University Park, PA 16802, United States; The NMR Facility, The Pennsylvania State University, University Park, PA 16802, United States.
| | - Dan G Sykes
- The Department of Chemistry, The Pennsylvania State University, University Park, PA 16802, United States.
| | - Lasse Jensen
- The Department of Chemistry, The Pennsylvania State University, University Park, PA 16802, United States.
| | - Louis H Haber
- The Department of Chemistry, Louisiana State University, Baton Rouge, LA 70803, United States.
| | - Daniel J Hayes
- The Department of Biomedical Engineering, The Pennsylvania State University, University Park, PA 16802, United States; Materials Research Institute, Materials Characterization Lab, Millennium Science Complex, The Pennsylvania State University, University Park, PA 16802, United States; The Huck Institute of the Life Sciences, Millennium Science Complex, The Pennsylvania State University, University Park, PA 16802, United States.
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27
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Bateman ME, Strong AL, Hunter RS, Bratton MR, Komati R, Sridhar J, Riley KE, Wang G, Hayes DJ, Boue SM, Burow ME, Bunnell BA. Osteoinductive effects of glyceollins on adult mesenchymal stromal/stem cells from adipose tissue and bone marrow. Phytomedicine 2017; 27:39-51. [PMID: 28314478 DOI: 10.1016/j.phymed.2017.02.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2016] [Revised: 01/04/2017] [Accepted: 02/12/2017] [Indexed: 06/06/2023]
Abstract
BACKGROUND While current therapies for osteoporosis focus on reducing bone resorption, the development of therapies to regenerate bone may also be beneficial. Promising anabolic therapy candidates include phytoestrogens, such as daidzein, which effectively induce osteogenesis of adipose-derived stromal cells (ASCs) and bone marrow stromal cells (BMSCs). PURPOSE To investigate the effects of glyceollins, structural derivatives of daidzein, on osteogenesis of ASCs and BMSCs. STUDY DESIGN Herein, the osteoinductive effects of glyceollin I and glyceollin II were assessed and compared to estradiol in ASCs and BMSCs. The mechanism by which glyceollin II induces osteogenesis was further examined. METHODS The ability of glyceollins to promote osteogenesis of ASCs and BMSCs was evaluated in adherent and scaffold cultures. Relative deposition of calcium was analyzed using Alizarin Red staining, Bichinchoninic acid Protein Assay, and Alamar Blue Assay. To further explore the mechanism by which glyceollin II exerts its osteoinductive effects, docking studies of glyceollin II, RNA isolation, cDNA synthesis, and quantitative RT-PCR (qPCR) were performed. RESULTS In adherent cultures, ASCs and BMSCs treated with estradiol, glyceollin I, or glyceollin II demonstrated increased calcium deposition relative to vehicle-treated cells. During evaluation on PLGA scaffolds seeded with ASCs and BMSCs, glyceollin II was the most efficacious in inducing ASC and BMSC osteogenesis compared to estradiol and glyceollin I. Dose-response analysis in ASCs and BMSCs revealed that glyceollin II has the highest potency at 10nM in adherent cultures and 1µM in tissue scaffold cultures. At all doses, osteoinductive effects were attenuated by fulvestrant, suggesting that glyceollin II acts at least in part through estrogen receptor-mediated pathways to induce osteogenesis. Analysis of gene expression demonstrated that, similar to estradiol, glyceollin II induces upregulation of genes involved in osteogenic differentiation. CONCLUSION The ability of glyceollin II to induce osteogenic differentiation in ASCs and BMSCs indicates that glyceollins hold the potential for the development of pharmacological interventions to improve clinical outcomes of patients with osteoporosis.
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Affiliation(s)
- Marjorie E Bateman
- Center for Stem Cell Research and Regenerative Medicine, Tulane University School of Medicine, New Orleans, LA, USA
| | - Amy L Strong
- Center for Stem Cell Research and Regenerative Medicine, Tulane University School of Medicine, New Orleans, LA, USA
| | - Ryan S Hunter
- Center for Stem Cell Research and Regenerative Medicine, Tulane University School of Medicine, New Orleans, LA, USA
| | - Melyssa R Bratton
- Cell and Molecular Biology Core Facility, Xavier University of Louisiana, New Orleans, LA, USA
| | - Rajesh Komati
- Department of Chemistry, Xavier University of Louisiana, New Orleans, LA, USA
| | - Jayalakshmi Sridhar
- Department of Chemistry, Xavier University of Louisiana, New Orleans, LA, USA
| | - Kevin E Riley
- Department of Chemistry, Xavier University of Louisiana, New Orleans, LA, USA
| | - Guangdi Wang
- Department of Chemistry, Xavier University of Louisiana, New Orleans, LA, USA
| | - Daniel J Hayes
- Department of Biological and Agricultural Engineering, Louisiana State University and Agricultural Center, Baton Rouge, LA, USA
| | - Stephen M Boue
- Southern Regional Research Center, US Department of Agriculture, 1100 Robert E. Lee Blvd, New Orleans, LA, USA
| | - Matthew E Burow
- Department of Medicine, Tulane University School of Medicine, New Orleans, LA, USA
| | - Bruce A Bunnell
- Center for Stem Cell Research and Regenerative Medicine, Tulane University School of Medicine, New Orleans, LA, USA; Department of Pharmacology, Tulane University School of Medicine, New Orleans, LA, USA; Division of Regenerative Medicine, Tulane National Primate Research Center, Tulane University, Covington, LA USA.
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28
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Kumal RR, Abu-Laban M, Landry CR, Kruger B, Zhang Z, Hayes DJ, Haber LH. Plasmon-Enhanced Photocleaving Dynamics in Colloidal MicroRNA-Functionalized Silver Nanoparticles Monitored with Second Harmonic Generation. Langmuir 2016; 32:10394-10401. [PMID: 27605308 PMCID: PMC5124014 DOI: 10.1021/acs.langmuir.6b02538] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
The photocleaving dynamics of colloidal microRNA-functionalized nanoparticles are studied using time-dependent second harmonic generation (SHG) measurements. Model drug-delivery systems composed of oligonucleotides attached to either silver nanoparticles or polystyrene nanoparticles using a nitrobenzyl photocleavable linker are prepared and characterized. The photoactivated controlled release is observed to be most efficient on resonance at 365 nm irradiation, with pseudo-first-order rate constants that are linearly proportional to irradiation powers. Additionally, silver nanoparticles show a 6-fold plasmon enhancement in photocleaving efficiency over corresponding polystyrene nanoparticle rates, while our previous measurements on gold nanoparticles show a 2-fold plasmon enhancement compared to polystyrene nanoparticles. Characterizations including extinction spectroscopy, electrophoretic mobility, and fluorimetry measurements confirm the analysis from the SHG results. The real-time SHG measurements are shown to be a highly sensitive method for investigating plasmon-enhanced photocleaving dynamics in model drug delivery systems.
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Affiliation(s)
- Raju R. Kumal
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, United States
| | - Mohammad Abu-Laban
- Department of Biological and Agricultural Engineering, Louisiana State University, Baton Rouge, Louisiana 70803, United States
| | - Corey R. Landry
- Department of Biological and Agricultural Engineering, Louisiana State University, Baton Rouge, Louisiana 70803, United States
| | - Blake Kruger
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, United States
| | - Zhenyu Zhang
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, United States
| | - Daniel J. Hayes
- Department of Biomedical Engineering, the Pennsylvania State University, University Park, Pennsylvania 16802, United States
| | - Louis H. Haber
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, United States
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29
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Strong AL, Hunter RS, Jones RB, Bowles AC, Dutreil MF, Gaupp D, Hayes DJ, Gimble JM, Levi B, McNulty MA, Bunnell BA. Obesity inhibits the osteogenic differentiation of human adipose-derived stem cells. J Transl Med 2016; 14:27. [PMID: 26818763 PMCID: PMC4730660 DOI: 10.1186/s12967-016-0776-1] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2015] [Accepted: 01/06/2016] [Indexed: 12/25/2022] Open
Abstract
Background Craniomaxillofacial defects secondary to trauma, tumor resection, or congenital malformations are frequent unmet challenges, due to suboptimal alloplastic options and limited autologous tissues such as bone. Significant advances have been made in the application of adipose-derived stem/stromal cells (ASCs) in the pre-clinical and clinical settings as a cell source for tissue engineering approaches. To fully realize the translational potential of ASCs, the identification of optimal donors for ASCs will ensure the successful implementation of these cells for tissue engineering approaches. In the current study, the impact of obesity on the osteogenic differentiation of ASCs was investigated. Methods ASCs isolated from lean donors (body mass index <25; lnASCs) and obese donors (body mass index >30; obASCs) were induced with osteogenic differentiation medium as monolayers in an estrogen-depleted culture system and on three-dimensional scaffolds. Critical size calvarial defects were generated in male nude mice and treated with scaffolds implanted with lnASCs or obASCs. Results lnASCs demonstrated enhanced osteogenic differentiation in monolayer culture system, on three-dimensional scaffolds, and for the treatment of calvarial defects, whereas obASCs were unable to induce similar levels of osteogenic differentiation in vitro and in vivo. Gene expression analysis of lnASCs and obASCs during osteogenic differentiation demonstrated higher levels of osteogenic genes in lnASCs compared to obASCs. Conclusion Collectively, these results indicate that obesity reduces the osteogenic differentiation capacity of ASCs such that they may have a limited suitability as a cell source for tissue engineering. Electronic supplementary material The online version of this article (doi:10.1186/s12967-016-0776-1) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Amy L Strong
- Center for Stem Cell Research and Regenerative Medicine, Tulane University School of Medicine, 1430 Tulane Avenue, New Orleans, LA, 70112, USA.
| | - Ryan S Hunter
- Center for Stem Cell Research and Regenerative Medicine, Tulane University School of Medicine, 1430 Tulane Avenue, New Orleans, LA, 70112, USA.
| | - Robert B Jones
- Center for Stem Cell Research and Regenerative Medicine, Tulane University School of Medicine, 1430 Tulane Avenue, New Orleans, LA, 70112, USA.
| | - Annie C Bowles
- Center for Stem Cell Research and Regenerative Medicine, Tulane University School of Medicine, 1430 Tulane Avenue, New Orleans, LA, 70112, USA.
| | - Maria F Dutreil
- Center for Stem Cell Research and Regenerative Medicine, Tulane University School of Medicine, 1430 Tulane Avenue, New Orleans, LA, 70112, USA.
| | - Dina Gaupp
- Center for Stem Cell Research and Regenerative Medicine, Tulane University School of Medicine, 1430 Tulane Avenue, New Orleans, LA, 70112, USA.
| | - Daniel J Hayes
- Department of Biological and Agricultural Engineering, Louisiana State University, Baton Rouge, LA, 70803, USA.
| | - Jeffrey M Gimble
- Center for Stem Cell Research and Regenerative Medicine, Tulane University School of Medicine, 1430 Tulane Avenue, New Orleans, LA, 70112, USA. .,LaCell LLC, New Orleans, LA, 70112, USA. .,Department of Surgery, Tulane University School of Medicine, New Orleans, LA, 70112, USA.
| | - Benjamin Levi
- Department of Surgery, Division of Plastic Surgery, University of Michigan, Ann Arbor, MI, USA.
| | - Margaret A McNulty
- Department of Comparative Biomedical Sciences, School of Veterinary Medicine, Louisiana State University, Baton Rouge, LA, 70803, USA.
| | - Bruce A Bunnell
- Center for Stem Cell Research and Regenerative Medicine, Tulane University School of Medicine, 1430 Tulane Avenue, New Orleans, LA, 70112, USA. .,Department of Pharmacology, Tulane University School of Medicine, New Orleans, LA, 70112, USA.
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30
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Hayes DJ, Berman MG. Editorial: Nature and the Environment: The Psychology of Its Benefits and Its Protection. Front Psychol 2015; 6:1804. [PMID: 26635700 PMCID: PMC4658421 DOI: 10.3389/fpsyg.2015.01804] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2015] [Accepted: 11/09/2015] [Indexed: 11/13/2022] Open
Affiliation(s)
- Daniel J Hayes
- Department of Psychology, The University of Chicago Chicago, IL, USA
| | - Marc G Berman
- Department of Psychology, The University of Chicago Chicago, IL, USA
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31
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Koven CD, Schuur EAG, Schädel C, Bohn TJ, Burke EJ, Chen G, Chen X, Ciais P, Grosse G, Harden JW, Hayes DJ, Hugelius G, Jafarov EE, Krinner G, Kuhry P, Lawrence DM, MacDougall AH, Marchenko SS, McGuire AD, Natali SM, Nicolsky DJ, Olefeldt D, Peng S, Romanovsky VE, Schaefer KM, Strauss J, Treat CC, Turetsky M. A simplified, data-constrained approach to estimate the permafrost carbon-climate feedback. Philos Trans A Math Phys Eng Sci 2015; 373:20140423. [PMID: 26438276 PMCID: PMC4608038 DOI: 10.1098/rsta.2014.0423] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 08/05/2015] [Indexed: 05/05/2023]
Abstract
We present an approach to estimate the feedback from large-scale thawing of permafrost soils using a simplified, data-constrained model that combines three elements: soil carbon (C) maps and profiles to identify the distribution and type of C in permafrost soils; incubation experiments to quantify the rates of C lost after thaw; and models of soil thermal dynamics in response to climate warming. We call the approach the Permafrost Carbon Network Incubation-Panarctic Thermal scaling approach (PInc-PanTher). The approach assumes that C stocks do not decompose at all when frozen, but once thawed follow set decomposition trajectories as a function of soil temperature. The trajectories are determined according to a three-pool decomposition model fitted to incubation data using parameters specific to soil horizon types. We calculate litterfall C inputs required to maintain steady-state C balance for the current climate, and hold those inputs constant. Soil temperatures are taken from the soil thermal modules of ecosystem model simulations forced by a common set of future climate change anomalies under two warming scenarios over the period 2010 to 2100. Under a medium warming scenario (RCP4.5), the approach projects permafrost soil C losses of 12.2-33.4 Pg C; under a high warming scenario (RCP8.5), the approach projects C losses of 27.9-112.6 Pg C. Projected C losses are roughly linearly proportional to global temperature changes across the two scenarios. These results indicate a global sensitivity of frozen soil C to climate change (γ sensitivity) of -14 to -19 Pg C °C(-1) on a 100 year time scale. For CH4 emissions, our approach assumes a fixed saturated area and that increases in CH4 emissions are related to increased heterotrophic respiration in anoxic soil, yielding CH4 emission increases of 7% and 35% for the RCP4.5 and RCP8.5 scenarios, respectively, which add an additional greenhouse gas forcing of approximately 10-18%. The simplified approach presented here neglects many important processes that may amplify or mitigate C release from permafrost soils, but serves as a data-constrained estimate on the forced, large-scale permafrost C response to warming.
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Affiliation(s)
- C D Koven
- Earth Sciences Division, Lawrence Berkeley National Lab, Berkeley, CA, USA
| | - E A G Schuur
- Center for Ecosystem Science and Society, Northern Arizona University, Flagstaff, AZ, USA
| | - C Schädel
- Center for Ecosystem Science and Society, Northern Arizona University, Flagstaff, AZ, USA
| | - T J Bohn
- Department of Civil and Environmental Engineering, University of Washington, Seattle, WA, USA School of Earth and Space Exploration, Arizona State University, Tempe, AZ, USA
| | - E J Burke
- Met Office Hadley Centre, Exeter, UK
| | - G Chen
- Environmental Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN, USA
| | - X Chen
- Department of Civil and Environmental Engineering, University of Washington, Seattle, WA, USA
| | - P Ciais
- Laboratoire des Sciences du Climat et de l'Environnement (LSCE CEA-CNRS-UVSQ), Gif-sur-Yvette, France
| | - G Grosse
- Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Periglacial Research Unit, Potsdam, Germany
| | - J W Harden
- United States Geological Survey, Menlo Park, CA, USA
| | - D J Hayes
- Environmental Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN, USA
| | - G Hugelius
- Department of Physical Geography, Bolin Centre of Climate Research, Stockholm University, Stockholm, Sweden
| | - E E Jafarov
- National Snow and Ice Data Center, University of Colorado, Boulder, CO, USA
| | - G Krinner
- Laboratoire de Glaciologie et Géophysique de l'Environnement, CNRS and Université Grenoble Alpes, Grenoble 38041, France
| | - P Kuhry
- Department of Physical Geography, Bolin Centre of Climate Research, Stockholm University, Stockholm, Sweden
| | - D M Lawrence
- Climate and Global Dynamics Division, National Center for Atmospheric Research, Boulder, CO, USA
| | - A H MacDougall
- School of Earth and Ocean Sciences, University of Victoria, Victoria, British Columbia, Canada
| | - S S Marchenko
- Geophysical Institute Permafrost Laboratory, University of Alaska, Fairbanks, AK, USA
| | - A D McGuire
- US Geological Survey, Alaska Cooperative Fish and Wildlife Research Unit, University of Alaska Fairbanks, Fairbanks, AK, USA
| | - S M Natali
- Woods Hole Research Center, Falmouth, MA, USA
| | - D J Nicolsky
- Geophysical Institute Permafrost Laboratory, University of Alaska, Fairbanks, AK, USA
| | - D Olefeldt
- Department of Renewable Resources, University of Alberta, Edmonton, Alberta, Canada
| | - S Peng
- Laboratoire des Sciences du Climat et de l'Environnement (LSCE CEA-CNRS-UVSQ), Gif-sur-Yvette, France Laboratoire de Glaciologie et Géophysique de l'Environnement, CNRS and Université Grenoble Alpes, Grenoble 38041, France
| | - V E Romanovsky
- Geophysical Institute Permafrost Laboratory, University of Alaska, Fairbanks, AK, USA
| | - K M Schaefer
- National Snow and Ice Data Center, University of Colorado, Boulder, CO, USA
| | - J Strauss
- Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Periglacial Research Unit, Potsdam, Germany
| | - C C Treat
- United States Geological Survey, Menlo Park, CA, USA
| | - M Turetsky
- Department of Integrative Biology, University of Ontario, Guelph, Ontario, Canada
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Parmentier FJW, Zhang W, Mi Y, Zhu X, van Huissteden J, Hayes DJ, Zhuang Q, Christensen TR, McGuire AD. Rising methane emissions from northern wetlands associated with sea ice decline. Geophys Res Lett 2015; 42:7214-7222. [PMID: 27667870 PMCID: PMC5014133 DOI: 10.1002/2015gl065013] [Citation(s) in RCA: 2] [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] [Received: 06/19/2015] [Revised: 07/22/2015] [Accepted: 07/23/2015] [Indexed: 05/26/2023]
Abstract
The Arctic is rapidly transitioning toward a seasonal sea ice-free state, perhaps one of the most apparent examples of climate change in the world. This dramatic change has numerous consequences, including a large increase in air temperatures, which in turn may affect terrestrial methane emissions. Nonetheless, terrestrial and marine environments are seldom jointly analyzed. By comparing satellite observations of Arctic sea ice concentrations to methane emissions simulated by three process-based biogeochemical models, this study shows that rising wetland methane emissions are associated with sea ice retreat. Our analyses indicate that simulated high-latitude emissions for 2005-2010 were, on average, 1.7 Tg CH4 yr-1 higher compared to 1981-1990 due to a sea ice-induced, autumn-focused, warming. Since these results suggest a continued rise in methane emissions with future sea ice decline, observation programs need to include measurements during the autumn to further investigate the impact of this spatial connection on terrestrial methane emissions.
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Affiliation(s)
- Frans-Jan W Parmentier
- Department of Physical Geography and Ecosystem Science Lund University Lund Sweden; Arctic Research Centre Aarhus University Aarhus Denmark
| | - Wenxin Zhang
- Department of Physical Geography and Ecosystem Science Lund University Lund Sweden
| | - Yanjiao Mi
- Faculty of Earth and Life Sciences VU University Amsterdam Amsterdam Netherlands; Institute of Arctic Biology University of Alaska Fairbanks Fairbanks Alaska USA
| | - Xudong Zhu
- Department of Earth, Atmospheric, and Planetary Sciences and Department of Agronomy Purdue University West Lafayette Indiana USA
| | | | - Daniel J Hayes
- Environmental Sciences Division Oak Ridge National Laboratory Oak Ridge Tennessee USA
| | - Qianlai Zhuang
- Department of Earth, Atmospheric, and Planetary Sciences and Department of Agronomy Purdue University West Lafayette Indiana USA
| | - Torben R Christensen
- Department of Physical Geography and Ecosystem Science Lund University Lund Sweden; Arctic Research Centre Aarhus University Aarhus Denmark
| | - A David McGuire
- U.S. Geological Survey, Alaska Cooperative Fish and Wildlife Research Unit University of Alaska Fairbanks Fairbanks Alaska USA
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Kumal RR, Landry CR, Abu-Laban M, Hayes DJ, Haber LH. Monitoring the Photocleaving Dynamics of Colloidal MicroRNA-Functionalized Gold Nanoparticles Using Second Harmonic Generation. Langmuir 2015; 31:9983-90. [PMID: 26313536 PMCID: PMC4819427 DOI: 10.1021/acs.langmuir.5b02199] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Photoactivated drug delivery systems using gold nanoparticles provide the promise of spatiotemporal control of delivery that is crucial for applications ranging from regenerative medicine to cancer therapy. In this study, we use second harmonic generation (SHG) spectroscopy to monitor the light-activated controlled release of oligonucleotides from the surface of colloidal gold nanoparticles. MicroRNA is functionalized to spherical gold nanoparticles using a nitrobenzyl linker that undergoes photocleaving upon ultraviolet irradiation. The SHG signal generated from the colloidal nanoparticle sample is shown to be a sensitive probe for monitoring the photocleaving dynamics in real time. The photocleaving irradiation wavelength is scanned to show maximum efficiency on resonance at 365 nm, and the kinetics are investigated at varying irradiation powers to demonstrate that the nitrobenzyl photocleaving is a one-photon process. Additional characterization methods including electrophoretic mobility measurements, extinction spectroscopy, and fluorimetry are used to verify the SHG results, leading to a better understanding of the photocleaving dynamics for this model oligonucleotide therapeutic delivery system.
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Affiliation(s)
- Raju R. Kumal
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, United States
| | - Corey R. Landry
- Department of Biological, Agricultural Engineering, Louisiana State University, Baton Rouge, Louisiana 70803, United States
| | - Mohammad Abu-Laban
- Department of Biological, Agricultural Engineering, Louisiana State University, Baton Rouge, Louisiana 70803, United States
| | - Daniel J. Hayes
- Department of Biological, Agricultural Engineering, Louisiana State University, Baton Rouge, Louisiana 70803, United States
| | - Louis H. Haber
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, United States
- Corresponding Author: ; phone: (225) 578-7965
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Totaro NP, Murphy ZD, Burcham AE, King CT, Scherr TF, Bounds CO, Dasa V, Pojman JA, Hayes DJ. In vitro evaluation of thermal frontally polymerized thiol-ene composites as bone augments. J Biomed Mater Res B Appl Biomater 2015; 104:1152-60. [PMID: 26061219 DOI: 10.1002/jbm.b.33466] [Citation(s) in RCA: 7] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2014] [Revised: 03/31/2015] [Accepted: 05/07/2015] [Indexed: 11/12/2022]
Abstract
Because of the large number of total knee replacement (TKR) surgeries conducted per year, and with projections of increased demand to almost a million primary TKR surgeries per year by 2030 in the United States alone, there is a need to discover more efficient working materials as alternatives to current bone cements. There is a need for surgeons and hospitals to become more efficient and better control over the operative environment. One area of inefficiency is the cement steps during TKR. Currently the surgeon has very little control over cement polymerization. This leads to an increase in time, waste, and procedural inefficiencies. There is a clear need to create an extended working time, moldable, osteoconductive, and osteoinductive bone augment as a substitution for the current clinically used bone cement where the surgeon has better control over the polymerization process. This study explored several compositions of pentaerythritol-co-trimethylolpropane tris-(3-mercaptopropionate) hydroxyapatite composite materials prepared via benzoyl peroxide-initiated thermal frontal polymerization. The 4:1 acrylate to thiol ratio containing augment material shows promise with a maximal propagation temperature of 160°C ± 10°C, with mechanical strength of 3.65 MPa, and 111% cytocompatibility, relative to the positive control. This frontally polymerized material may have application as an augment with controlled polymerization supporting cemented implants. © 2015 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 104B: 1152-1160, 2016.
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Affiliation(s)
- Nicholas P Totaro
- Department of Biological and Agricultural Engineering, Louisiana State University and LSU AgCenter, Baton Rouge, Louisiana, 70803
| | - Zachari D Murphy
- Department of Biological Sciences, Louisiana State University, Baton Rouge, Louisiana, 70803
| | - Abigail E Burcham
- Cain Department of Chemical Engineering, Louisiana State University, Baton Rouge, Louisiana, 70803
| | - Connor T King
- Department of Biological and Agricultural Engineering, Louisiana State University and LSU AgCenter, Baton Rouge, Louisiana, 70803
| | - Thomas F Scherr
- Department of Biomedical Engineering, Vanderbilt University, Nashville, Tennessee, 37235
| | - Christopher O Bounds
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana, 70803
| | - Vinod Dasa
- Department of Orthopedics, Louisiana State University Health Science Center, New Orleans, Louisiana, 70115
| | - John A Pojman
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana, 70803
| | - Daniel J Hayes
- Department of Biological and Agricultural Engineering, Louisiana State University and LSU AgCenter, Baton Rouge, Louisiana, 70803
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Chen C, Watkins-Curry P, Smoak M, Hogan K, Deese S, McCandless GT, Chan JY, Hayes DJ. Targeting Calcium Magnesium Silicates for Polycaprolactone/Ceramic Composite Scaffolds. ACS Biomater Sci Eng 2015. [DOI: 10.1021/ab500011x] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Cong Chen
- Department
of Biological Engineering, Louisiana State University and Louisiana State University Agricultural Center, Baton Rouge, Louisiana 70803, United States
| | - Pilanda Watkins-Curry
- Department
of Chemistry, University of Texas at Dallas, 800 West Campbell Road, Richardson, Texas 75080, United States
- Department
of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, United States
| | - Mollie Smoak
- Department
of Biological Engineering, Louisiana State University and Louisiana State University Agricultural Center, Baton Rouge, Louisiana 70803, United States
| | - Katie Hogan
- Department
of Biological Engineering, Louisiana State University and Louisiana State University Agricultural Center, Baton Rouge, Louisiana 70803, United States
| | - Steve Deese
- Department
of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, United States
| | - Gregory T. McCandless
- Department
of Chemistry, University of Texas at Dallas, 800 West Campbell Road, Richardson, Texas 75080, United States
| | - Julia Y. Chan
- Department
of Chemistry, University of Texas at Dallas, 800 West Campbell Road, Richardson, Texas 75080, United States
| | - Daniel J. Hayes
- Department
of Biological Engineering, Louisiana State University and Louisiana State University Agricultural Center, Baton Rouge, Louisiana 70803, United States
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Qureshi AT, Doyle A, Chen C, Coulon D, Dasa V, Del Piero F, Levi B, Monroe WT, Gimble JM, Hayes DJ. Photoactivated miR-148b-nanoparticle conjugates improve closure of critical size mouse calvarial defects. Acta Biomater 2015; 12:166-173. [PMID: 25462528 DOI: 10.1016/j.actbio.2014.10.010] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2014] [Revised: 09/26/2014] [Accepted: 10/09/2014] [Indexed: 12/21/2022]
Abstract
Inducible systems providing temporal control of differentiation have the potential to improve outcomes in surgical reconstruction and regenerative medicine by precise modulation of wound healing and tissue repair processes. The aim of this study was to demonstrate that nanoformulated microRNA (miRNA) conjugates activated via photo exposure can lead to the induced osteogenic differentiation of human adipose-derived stromal/stem cells (hASCs) in vivo. The conjugate PC-miR-148b-SNP, a mimic of miRNA-148b tethered to silver nanoparticles (SNPs) via a photolabile linker, was used to modulate gene expression for improved closure of a critical size defect drilled on the right parietal bone of male CD-1 nude homozygous mice. The PC-miR-148b-SNP conjugates added to hASCs and loaded to either Matrigel or polycaprolactone (PCL) scaffolds resulted in different levels of healing of the defect. After 4 and 12weeks, 3-D micro-computed tomography reconstructed images indicate statistically significant defect closure from 3.83±1.19% to 5.46±2.01% and 6.54±4.28% to 32.53±8.3% for non-photoactivated and photoactivated conjugates, respectively, in the PCL scaffolds. The results were confirmed with H&E and Masson's Trichrome stains in the transverse sections of photoactivated conjugates. Collagen fiber staining was greatest at 12weeks when it reached approximately the same density and thickness as the native calvarium. This technology provides a platform that can be used with other miRNAs that actively govern the pathways responsible for regenerative and wound healing processes.
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Tian H, Chen G, Lu C, Xu X, Hayes DJ, Ren W, Pan S, Huntzinger DN, Wofsy SC. North American terrestrial CO 2 uptake largely offset by CH 4 and N 2O emissions: toward a full accounting of the greenhouse gas budget. Clim Change 2015; 129:413-426. [PMID: 26005232 PMCID: PMC4439729 DOI: 10.1007/s10584-014-1072-9] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2013] [Accepted: 01/25/2014] [Indexed: 05/05/2023]
Abstract
The terrestrial ecosystems of North America have been identified as a sink of atmospheric CO2 though there is no consensus on the magnitude. However, the emissions of non-CO2 greenhouse gases (CH4 and N2O) may offset or even overturn the climate cooling effect induced by the CO2 sink. Using a coupled biogeochemical model, in this study, we have estimated the combined global warming potentials (GWP) of CO2, CH4 and N2O fluxes in North American terrestrial ecosystems and quantified the relative contributions of environmental factors to the GWP changes during 1979-2010. The uncertainty range for contemporary global warming potential has been quantified by synthesizing the existing estimates from inventory, forward modeling, and inverse modeling approaches. Our "best estimate" of net GWP for CO2, CH4 and N2O fluxes was -0.50 ± 0.27 Pg CO2 eq/year (1 Pg = 1015 g) in North American terrestrial ecosystems during 2001-2010. The emissions of CH4 and N2O from terrestrial ecosystems had offset about two thirds (73 %±14 %) of the land CO2 sink in the North American continent, showing large differences across the three countries, with offset ratios of 57 % ± 8 % in US, 83 % ± 17 % in Canada and 329 % ± 119 % in Mexico. Climate change and elevated tropospheric ozone concentration have contributed the most to GWP increase, while elevated atmospheric CO2 concentration have contributed the most to GWP reduction. Extreme drought events over certain periods could result in a positive GWP. By integrating the existing estimates, we have found a wide range of uncertainty for the combined GWP. From both climate change science and policy perspectives, it is necessary to integrate ground and satellite observations with models for a more accurate accounting of these three greenhouse gases in North America.
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Affiliation(s)
- Hanqin Tian
- International Center for Climate and Global Change Research and School of Forestry and Wildlife Sciences, Auburn University, Auburn, AL 36849 USA
| | - Guangsheng Chen
- International Center for Climate and Global Change Research and School of Forestry and Wildlife Sciences, Auburn University, Auburn, AL 36849 USA
| | - Chaoqun Lu
- International Center for Climate and Global Change Research and School of Forestry and Wildlife Sciences, Auburn University, Auburn, AL 36849 USA
| | - Xiaofeng Xu
- Environmental Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831 USA
| | - Daniel J. Hayes
- Environmental Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831 USA
| | - Wei Ren
- International Center for Climate and Global Change Research and School of Forestry and Wildlife Sciences, Auburn University, Auburn, AL 36849 USA
| | - Shufen Pan
- International Center for Climate and Global Change Research and School of Forestry and Wildlife Sciences, Auburn University, Auburn, AL 36849 USA
| | - Deborah N. Huntzinger
- School of Earth Sciences and Environmental Sustainability, North Arizona University, Flagstaff, AZ 86011 USA
| | - Steven C. Wofsy
- Department of Earth and Planetary Science, Harvard University, 29 Oxford St., Cambridge, MA 02138 USA
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Hayes DJ, van Buuren S, ter Kuile FO, Stasinopoulos DM, Rigby RA, Terlouw DJ. Developing regional weight-for-age growth references for malaria-endemic countries to optimize age-based dosing of antimalarials. Bull World Health Organ 2014; 93:74-83. [PMID: 25883400 PMCID: PMC4339962 DOI: 10.2471/blt.14.139113] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [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: 03/31/2014] [Revised: 10/22/2014] [Accepted: 10/22/2014] [Indexed: 11/27/2022] Open
Abstract
Objective To derive regional weight-for-age growth references to help optimize age-based dosing of antimalarials in Africa, the Americas, South-East Asia and the Western Pacific. Methods A weight-for-age database was constructed from pre-existing population-based anthropometric data obtained from household surveys and research groups. It contained data collected between 1995 and 2012 on 1 263 119 individuals (909 368 female, 353 751 male) older than 14 days and younger than 50 years in 64 malaria-endemic countries. Regional growth references were generated using a generalized additive model for location, scale and shape by combining data with varying distributions from a range of sources. Countries were weighted by their population at risk of malaria to enable references to be used in optimizing the dosing of antimalarials. Findings Large differences in weight-for-age distributions existed between the regions and between the regions and global growth standards. For example, the average adult male from the Americas weighed 68.1 kg – 6.0 kg more than males in South-East Asia and the Western Pacific (average: 62.1 kg). For adult women, the difference was over 10.4 kg: the average was 60.4 kg in the Americas and 50.0 kg in South-East Asia and the Western Pacific. Conclusion There were substantial variations in weight-for-age growth curves between malaria-endemic areas. The growth reference charts derived here can be used to guide the evidence-based optimization of aged-based dosing regimens for antimalarials and other drugs often prescribed by age.
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Affiliation(s)
- Daniel J Hayes
- Department of Clinical Sciences, Liverpool School of Tropical Medicine, Pembroke Place, Liverpool, L3 5QA, England
| | - Stef van Buuren
- Netherlands Organisation for Applied Scientific Research, Leiden, Netherlands
| | - Feiko O ter Kuile
- Department of Clinical Sciences, Liverpool School of Tropical Medicine, Pembroke Place, Liverpool, L3 5QA, England
| | | | - Robert A Rigby
- STORM Research Centre, London Metropolitan University, London, England
| | - Dianne J Terlouw
- Department of Clinical Sciences, Liverpool School of Tropical Medicine, Pembroke Place, Liverpool, L3 5QA, England
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Chen C, Garber L, Smoak M, Fargason C, Scherr T, Blackburn C, Bacchus S, Lopez MJ, Pojman JA, Del Piero F, Hayes DJ. In vitro and in vivo characterization of pentaerythritol triacrylate-co-trimethylolpropane nanocomposite scaffolds as potential bone augments and grafts. Tissue Eng Part A 2014; 21:320-31. [PMID: 25134965 DOI: 10.1089/ten.tea.2014.0018] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
A thiol-acrylate-based copolymer synthesized via an amine-catalyzed Michael addition was studied in vitro and in vivo to assess its potential as an in situ polymerizing graft or augment in bone defect repair. The blends of hydroxyapatite (HA) with pentaerythritol triacrylate-co-trimethylolpropane (PETA), cast as solids or gas foamed as porous scaffolds, were evaluated in an effort to create a biodegradable osteogenic material for use as a bone-void-filling augment. Osteogenesis experiments were conducted with human adipose-derived mesenchymal stromal cells (hASCs) to determine the ability of the material to serve as an osteoinductive substrate. Poly(ɛ-caprolactone) (PCL) composites PCL:HA (80:20) (wt/wt%) served as the control scaffold, while the experimental scaffolds included PETA:HA (100:0), (85:15), (80:20), and (75:25) composites (wt/wt%). The results indicate that PETA:HA (80:20) foam composites had higher mechanical strength than the corresponding porous PCL:HA (80:20) scaffolds made by thermo-precipitation method, and in the case of foamed composites, increasing HA content directly correlated with increased yield strength. For cytotoxicity and osteogenesis experiments, hASCs cultured for 21 days on PETA:HA scaffolds in stromal medium displayed the greatest number of live cells compared with PCL:HA composites. Moreover, hASCs cultured on foamed PETA:HA (80:20) scaffolds resulted in the greatest mineralization, increased alkaline phosphatase (ALP) expression, and the highest osteocalcin (OCN) expression after 21 days. Overall, the PETA:HA (80:20) and PETA:HA (85:15) scaffolds, with 66.38% and 72.02% porosity, respectively, had higher mechanical strength and cytocompatibility compared with the PCL:HA control. The results of the 6-week in vivo biocompatibility study using a posterior lumbar spinal fusion model demonstrate that PETA:HA can be foamed in vivo without serious adverse effects at the surgical site. Additionally, it was demonstrated that cells migrate into the interconnected pore volume and are found within centers of ossification.
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Affiliation(s)
- Cong Chen
- 1 Department of Biological Engineering, Louisiana State University Agricultural Center , Louisiana State University, Baton Rouge, Louisiana
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Smoak M, Chen C, Qureshi A, Garber L, Pojman JA, Janes ME, Hayes DJ. Antimicrobial cytocompatible pentaerythritol triacrylate-co-trimethylolpropane composite scaffolds for orthopaedic implants. J Appl Polym Sci 2014. [DOI: 10.1002/app.41099] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Mollie Smoak
- Department of Biological Engineering; Louisiana State University and Louisiana State University Agricultural Center; Louisiana
| | - Cong Chen
- Department of Biological Engineering; Louisiana State University and Louisiana State University Agricultural Center; Louisiana
| | - Ammar Qureshi
- Department of Biological Engineering; Louisiana State University and Louisiana State University Agricultural Center; Louisiana
| | - Leah Garber
- Department of Chemistry; Louisiana State University; Baton Rouge Louisiana
| | - John A. Pojman
- Department of Chemistry; Louisiana State University; Baton Rouge Louisiana
| | - Marlene E. Janes
- Department of Food Science; Louisiana State University; Baton Rouge Louisiana
| | - Daniel J. Hayes
- Department of Biological Engineering; Louisiana State University and Louisiana State University Agricultural Center; Louisiana
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Hodel EM, Kay K, Hayes DJ, Terlouw DJ, Hastings IM. Optimizing the programmatic deployment of the anti-malarials artemether-lumefantrine and dihydroartemisinin-piperaquine using pharmacological modelling. Malar J 2014; 13:138. [PMID: 24708571 PMCID: PMC4036747 DOI: 10.1186/1475-2875-13-138] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [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: 01/12/2014] [Accepted: 03/27/2014] [Indexed: 01/06/2023] Open
Abstract
BACKGROUND Successful programmatic use of anti-malarials faces challenges that are not covered by standard drug development processes. The development of appropriate pragmatic dosing regimens for low-resource settings or community-based use is not formally regulated, even though these may alter factors which can substantially affect individual patient and population level outcome, such as drug exposure, patient adherence and the spread of drug resistance and can affect a drug's reputation and its eventual therapeutic lifespan. METHODS An in silico pharmacological model of anti-malarial drug treatment with the pharmacokinetic/pharmacodynamic profiles of artemether-lumefantrine (AM-LF, Coartem®) and dihydroartemisinin-piperaquine (DHA-PPQ, Eurartesim®) was constructed to assess the potential impact of programmatic factors, including regionally optimized, age-based dosing regimens, poor patient adherence, food effects and drug resistance on treatment outcome at population level, and compared both drugs' susceptibility to these factors. RESULTS Compared with DHA-PPQ, therapeutic effectiveness of AM-LF seems more robust to factors affecting drug exposure, such as age- instead of weight-based dosing or poor adherence. The model highlights the sub-optimally low ratio of DHA:PPQ which, in combination with the narrow therapeutic dose range of PPQ compared to DHA that drives the weight or age cut-offs, leaves DHA at a high risk of under-dosing. CONCLUSION Pharmacological modelling of real-life scenarios can provide valuable supportive data and highlight modifiable determinants of therapeutic effectiveness that can help optimize the deployment of anti-malarials in control programmes.
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Affiliation(s)
- Eva Maria Hodel
- Liverpool School of Tropical Medicine, Pembroke Place, Liverpool L3 5QA, UK.
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Qureshi AT, Chen C, Shah F, Thomas-Porch C, Gimble JM, Hayes DJ. Human Adipose-Derived Stromal/Stem Cell Isolation, Culture, and Osteogenic Differentiation. Methods Enzymol 2014; 538:67-88. [DOI: 10.1016/b978-0-12-800280-3.00005-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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Dumke JC, Qureshi A, Hamdan S, Rupnik K, El-Zahab B, Hayes DJ, Warner IM. In vitro activity studies of hyperthermal near-infrared nanoGUMBOS in MDA-MB-231 breast cancer cells. Photochem Photobiol Sci 2014; 13:1270-80. [DOI: 10.1039/c4pp00030g] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Nanoparticles devised entirely of ionic liquid-like materials called GUMBOS created a localized hyperthermal effect within breast cancer cells concurrent with near-infrared laser excitation.
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Affiliation(s)
| | - Ammar Qureshi
- Department of Biological and Agricultural Engineering
- Louisiana State University
- Baton Rouge, USA
| | - Suzana Hamdan
- Department of Chemistry
- Louisiana State University
- Baton Rouge, USA
| | - Kresimir Rupnik
- Department of Chemistry
- Louisiana State University
- Baton Rouge, USA
| | - Bilal El-Zahab
- Department of Chemistry
- Louisiana State University
- Baton Rouge, USA
| | - Daniel J. Hayes
- Department of Biological and Agricultural Engineering
- Louisiana State University
- Baton Rouge, USA
| | - Isiah M. Warner
- Department of Chemistry
- Louisiana State University
- Baton Rouge, USA
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Dumke JC, Qureshi A, Hamdan S, El-Zahab B, Das S, Hayes DJ, Boldor D, Rupnik K, Warner IM. Photothermal response of near-infrared-absorbing NanoGUMBOS. Appl Spectrosc 2014; 68:340-352. [PMID: 24666951 DOI: 10.1366/13-07268] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The photothermal properties of several near-infrared-absorbing nanoparticles derived from group of uniform materials based on organic salts (GUMBOS) and composed of cationic dyes coupled with biocompatible anions are evaluated. These nanoparticles were synthesized using a reprecipitation method performed at various pH values: 2.0, 5.0, 7.0, 9.0, and 11.0. The cations for the nanoparticles derived from GUMBOS (nanoGUMBOS), [1048] and [1061], have absorbance maxima at wavelengths overlapping with human soft tissue absorbance minima. Near-infrared-absorbing nanoGUMBOS excited with a 1064 nm continuous laser led to heat generation, with an average temperature increase of 20.4 ± 2.7 °C. Although the [1061][Deoxycholate] nanoGUMBOS generated the highest temperature increase (23.7 ± 2.4 °C), it was the least photothermally efficient compound (13.0%) due to its relatively large energy band gap of 0.892 eV. The more photothermally efficient compound [1048][Ascorbate] (64.4%) had a smaller energy band gap of 0.861 eV and provided an average photothermal temperature increase of 21.0 ± 2.1 °C.
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Affiliation(s)
- Jonathan C Dumke
- Department of Chemistry, Louisiana State University, Baton Rouge, LA 70803 USA
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Kicklighter DW, Hayes DJ, McClelland JW, Peterson BJ, McGuire AD, Melillo JM. Insights and issues with simulating terrestrial DOC loading of Arctic river networks. Ecol Appl 2013; 23:1817-36. [PMID: 24555311 DOI: 10.1890/11-1050.1] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Terrestrial carbon dynamics influence the contribution of dissolved organic carbon (DOC) to river networks in addition to hydrology. In this study, we use a biogeochemical process model to simulate the lateral transfer of DOC from land to the Arctic Ocean via riverine transport. We estimate that, over the 20th century, the pan-Arctic watershed has contributed, on average, 32 Tg C/yr of DOC to river networks emptying into the Arctic Ocean with most of the DOC coming from the extensive area of boreal deciduous needle-leaved forests and forested wetlands in Eurasian watersheds. We also estimate that the rate of terrestrial DOC loading has been increasing by 0.037 Tg C/yr2 over the 20th century primarily as a result of climate-induced increases in water yield. These increases have been offset by decreases in terrestrial DOC loading caused by wildfires. Other environmental factors (CO2 fertilization, ozone pollution, atmospheric nitrogen deposition, timber harvest, agriculture) are estimated to have relatively small effects on terrestrial DOC loading to Arctic rivers. The effects of the various environmental factors on terrestrial carbon dynamics have both offset and enhanced concurrent effects on hydrology to influence terrestrial DOC loading and may be changing the relative importance of terrestrial carbon dynamics on this carbon flux. Improvements in simulating terrestrial DOC loading to pan-Arctic rivers in the future will require better information on the production and consumption of DOC within the soil profile, the transfer of DOC from land to headwater streams, the spatial distribution of precipitation and its temporal trends, carbon dynamics of larch-dominated ecosystems in eastern Siberia, and the role of industrial organic effluents on carbon budgets of rivers in western Russia.
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Affiliation(s)
- David W Kicklighter
- The Ecosystems Center, Marine Biological Laboratory, Woods Hole, Massachusetts 02543, USA.
| | - Daniel J Hayes
- Institute of Arctic Biology, University of Alaska, Fairbanks, Alaska 99775, USA
| | - James W McClelland
- Marine Science Institute, University of Texas at Austin, Port Aransas, Texas 78373, USA
| | - Bruce J Peterson
- The Ecosystems Center, Marine Biological Laboratory, Woods Hole, Massachusetts 02543, USA
| | - A David McGuire
- U.S. Geological Survey, Alaska Cooperative Fish and Wildlife Research Unit, University of Alaska, Fairbanks, Alaska 99775, USA
| | - Jerry M Melillo
- The Ecosystems Center, Marine Biological Laboratory, Woods Hole, Massachusetts 02543, USA
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Olliaro PL, Vaillant M, Hayes DJ, Montresor A, Chitsulo L. Practical dosing of praziquantel for schistosomiasis in preschool-aged children. Trop Med Int Health 2013; 18:1085-1089. [PMID: 23937700 DOI: 10.1111/tmi.12152] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [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: 12/29/2022]
Abstract
OBJECTIVE Schistosomiasis is known to occur in preschool-aged children, but achieving accurate dosing of praziquantel in its current form is challenging. While waiting for a paediatric formulation, there is a need to develop a means for using the available products to treat this age group. Current 600-mg tablets are differently scored to give units of 150 mg (a quarter of a tablet) or 300 mg (half a tablet). METHODS We examined several dosing schemes to dose accurately (40-60 mg/kg) children aged 3-72 months (weight range 4-25 kg, based on available weight-for-age growth references from sub-Saharan Africa and Brazil, n = 106,230). RESULTS Adequate dosing can be achieved with formulations that can be split into four 150 mg quarters for children weighing 5 kg or more, and with tablets than can be split into two 300 mg halves for children weighing 10 kg or more. Giving ½ tablet for 5-7 kg; ¾ tablet for 8-10 kg; 1 tablet for 11-15 kg; 1 ½ tablet for 16-21 kg; and two tablets for 22-25 kg will have 100% of subjects correctly dosed within the target 40-60 mg/kg range. CONCLUSIONS Formulations that can be divided into four parts (to give 150 mg increments) are preferred for children weighing less than 11 kg; the same dosing can be applied with 600 mf praziquantel formulations that can be divided into four quarters or two halves from 11 kg body weight.
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Affiliation(s)
- Piero L Olliaro
- UNICEF/UNDP/World Bank/WHO Special Programme for Research & Training in Tropical Diseases (TDR), Geneva, Switzerland
| | - Michel Vaillant
- Methodology and Statistics Unit, Centre de Recherche Public - Santé (CRP-Santé), Strassen, Luxembourg
| | - Daniel J Hayes
- Department of Clinical Sciences, Liverpool School of Tropical Medicine, Liverpool, UK
| | - Antonio Montresor
- Department of Control of Neglected Tropical Diseases, World Health Organization (WHO), Geneva, Switzerland
| | - Lester Chitsulo
- Department of Control of Neglected Tropical Diseases, World Health Organization (WHO), Geneva, Switzerland
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Zanetti AS, McCandless GT, Chan JY, Gimble JM, Hayes DJ. In vitro human adipose-derived stromal/stem cells osteogenesis in akermanite:poly-ε-caprolactone scaffolds. J Biomater Appl 2013; 28:998-1007. [PMID: 23796629 DOI: 10.1177/0885328213490974] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [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: 01/28/2023]
Abstract
This study compared the metabolic activity, cell proliferation and osteogenic differentiation of human adipose-derived stromal/stem cells cultured on four different scaffolds (poly-ε-caprolactone, akermanite:poly-ε-caprolactone composites, akermanite and β-tricalcium phosophate) with or without osteogenic media supplementation for up to 21 days. The hypothesis was that human adipose-derived stromal/stem cells osteogenesis in akermanite-containing scaffolds would be greater than the other scaffold types independent of the media supplementation. According to the results, human adipose-derived stromal/stem cells loaded on different scaffolds and cultured in both media conditions displayed significant changes in the metabolic activity and cell proliferation. After 21 days of culture in osteogenic medium, the human adipose-derived stromal/stem cells loaded onto akermanite-based scaffolds had greater calcium deposition and osteocalcin expression relative to human adipose-derived stromal/stem cells loaded onto β-tricalcium phosophate and poly-ε-caprolactone. In vivo investigations are needed to further assess the bone tissue engineering potential of human adipose-derived stromal/stem cells loaded to akermanite:poly-ε-caprolactone composites.
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Affiliation(s)
- Andrea S Zanetti
- 1Department of Biological Engineering, Louisiana State University and LSU AgCenter, Baton Rouge, LA, USA
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Abstract
Herein we report a facile layer-by-layer method for creating an antimicrobial coating composed of silver nanoparticles on medical grade titanium test discs. Nanoscale silver nanoparticle layers are attached to the titanium orthopedic implant material via aminopropyltriethoxy silane crosslinker that reacts with neighboring silane moieties to create an interconnected network. A monolayer of silane, followed by a monolayer of silver nanoparticles would form one self-assembled layer and this process can be repeated serially, resulting in increased silver nanoparticles deposition. The release rate of silver ion increases predictably with increasing numbers of layers and at appropriate thicknesses these coatings demonstrate 3-4 log reduction of viable Escherichia coli and Staphylococcus aureus bacteria. Increasing the thickness of the coatings resulted in reduced bacterial colonization as determined by fluorescent staining and image analysis. Interestingly, the cytotoxicity of murine 3T3 cells as quantified by fluorescent staining and flow cytometry, was minimal and did not vary significantly with the coating thickness. Additionally, these coatings are mechanically stable and resist delamination by orthogonal stress test. This simple layer-by-layer coating technique may provide a cost-effective and biocompatible method for reducing microbial colonization of implantable orthopedic devices.
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Affiliation(s)
- Ammar T Qureshi
- 1Department of Biological and Agricultural Engineering, Louisiana State University and Agricultural Center, Baton Rouge, USA
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Zhou C, Shi Q, Guo W, Terrell L, Qureshi AT, Hayes DJ, Wu Q. Electrospun bio-nanocomposite scaffolds for bone tissue engineering by cellulose nanocrystals reinforcing maleic anhydride grafted PLA. ACS Appl Mater Interfaces 2013; 5:3847-3854. [PMID: 23590943 DOI: 10.1021/am4005072] [Citation(s) in RCA: 165] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Electrospun fibrous bio-nanocomposite scaffolds reinforced with cellulose nanocrystals (CNCs) were fabricated by using maleic anhydride (MAH) grafted poly(lactic acid) (PLA) as matrix with improved interfacial adhesion between the two components. Morphological, thermal, mechanical, and in vitro degradation properties as well as basic cytocompatibility using human adult adipose derived mesenchymal stem cells (hASCs) of MAH grafted PLA/CNC (i.e., MPLA/CNC) scaffolds were characterized. Morphological investigation indicated that the diameter and polydispersity of electrospun MPLA/CNC nanofibers were reduced with the increased CNC content. The addition of CNCs improved both the thermal stability and mechanical properties of MPLA/CNC composites. The MPLA/CNC scaffolds at the 5 wt % CNC loading level showed not only superior tensile strength (more than 10 MPa), but also improved stability during in vitro degradation compared with the MPLA and PLA/CNC counterparts. Moreover, the fibrous MPLA/CNC composite scaffolds were non-toxic to hASCs and capable of supporting cell proliferation. This study demonstrates that fibrous MPLA/CNC bio-nanocomposite scaffolds are biodegradable, cytocompatible, and possess useful mechanical properties for bone tissue engineering.
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Affiliation(s)
- Chengjun Zhou
- School of Renewable Natural Resources, Louisiana State University Agricultural Center, Baton Rouge, Louisiana 70803, United States
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Brown PK, Qureshi AT, Moll AN, Hayes DJ, Monroe WT. Silver nanoscale antisense drug delivery system for photoactivated gene silencing. ACS Nano 2013; 7:2948-59. [PMID: 23473419 DOI: 10.1021/nn304868y] [Citation(s) in RCA: 91] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The unique photophysical properties of noble metal nanoparticles contribute to their potential as photoactivated drug delivery vectors. Here we demonstrate the synthesis and characterization of 60-80 nm silver nanoparticles (SNPs) decorated with thiol-terminated photolabile DNA oligonucleotides. In vitro assays and fluorescent confocal microscopy of treated cell cultures show efficient UV-wavelength photoactivation of surface-tethered caged ISIS2302 antisense oligonucleotides possessing internal photocleavable linkers. As a demonstration of the advantages of these novel nanocarriers, we investigate properties including: enhanced stability to nucleases, increased hybridization activity upon photorelease, and efficient cellular uptake as compared to commercial transfection vectors. Their potential as multicomponent delivery agents for oligonucleotide therapeutics is shown through regulation of ICAM-1 (Intracellular Adhesion Molecule-1) silencing. Our results suggest a means to achieve light-triggered, spatiotemporally controlled gene silencing via nontoxic silver nanocarriers, which hold promise as tailorable platforms for nanomedicine, gene expression studies, and genetic therapies.
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Affiliation(s)
- Paige K Brown
- Biological and Agricultural Engineering, Louisiana State University and LSU AgCenter, Baton Rouge, Louisiana 70803, United States
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