1
|
Zhang R, Hao T, Hu S, Wang K, Ren S, Tian Z, Jia Y. Electrolyte-Gated Graphene Field Effect Transistor-Based Ca 2+ Detection Aided by Machine Learning. SENSORS (BASEL, SWITZERLAND) 2022; 23:353. [PMID: 36616952 PMCID: PMC9824237 DOI: 10.3390/s23010353] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 12/21/2022] [Accepted: 12/27/2022] [Indexed: 06/17/2023]
Abstract
Flexible electrolyte-gated graphene field effect transistors (Eg-GFETs) are widely developed as sensors because of fast response, versatility and low-cost. However, their sensitivities and responding ranges are often altered by different gate voltages. These bias-voltage-induced uncertainties are an obstacle in the development of Eg-GFETs. To shield from this risk, a machine-learning-algorithm-based LgGFETs' data analyzing method is studied in this work by using Ca2+ detection as a proof-of-concept. For the as-prepared Eg-GFET-Ca2+ sensors, their transfer and output features are first measured. Then, eight regression models are trained with the use of different machine learning algorithms, including linear regression, support vector machine, decision tree and random forest, etc. Then, the optimized model is obtained with the random-forest-method-treated transfer curves. Finally, the proposed method is applied to determine Ca2+ concentration in a calibration-free way, and it is found that the relation between the estimated and real Ca2+ concentrations is close-to y = x. Accordingly, we think the proposed method may not only provide an accurate result but also simplify the traditional calibration step in using Eg-GFET sensors.
Collapse
Affiliation(s)
- Rong Zhang
- College of Electronic Information and Optical Engineering, Nankai University, Tianjin 300350, China
- School of Integrated Circuit Science and Engineering, Tianjin University of Technology, Tianjin 300384, China
| | - Tiantian Hao
- College of Electronic Information and Optical Engineering, Nankai University, Tianjin 300350, China
| | - Shihui Hu
- College of Electronic Information and Optical Engineering, Nankai University, Tianjin 300350, China
| | - Kaiyang Wang
- College of Electronic Information and Optical Engineering, Nankai University, Tianjin 300350, China
| | - Shuhui Ren
- College of Electronic Information and Optical Engineering, Nankai University, Tianjin 300350, China
| | - Ziwei Tian
- College of Electronic Information and Optical Engineering, Nankai University, Tianjin 300350, China
| | - Yunfang Jia
- College of Electronic Information and Optical Engineering, Nankai University, Tianjin 300350, China
| |
Collapse
|
2
|
Chen T, Gao F, Luo D, Wang S, Zhao Y, Liu S, Huang J, Lin Y, Zhang Z, Huang H, Wan L. Cistanoside A promotes osteogenesis of primary osteoblasts by alleviating apoptosis and activating autophagy through involvement of the Wnt/β-catenin signal pathway. ANNALS OF TRANSLATIONAL MEDICINE 2022; 10:64. [PMID: 35282110 PMCID: PMC8848445 DOI: 10.21037/atm-21-6742] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/12/2021] [Accepted: 01/07/2022] [Indexed: 11/22/2022]
Abstract
Background As a phenylethanoid glycoside extracted from Cistanche deserticola, cistanoside A has been shown to have antioxidative effects. In recent years, it has been found to play an important role in osteoporosis. Methods Primary osteoblasts were randomly divided into a cistanoside A (Cis A)-1 group (5 µM), a Cis A-2 group (10 µM), and a Cis A-3 group (20 µM) to screen the optimal dose. Then, cells were treated with Rapamycin (Rapa), 3-MA, Dickkopf-1 (DKK-1), 3MA + Cis A (10 µM), and DKK-1 + Cis A (10 µM). After a certain period of routine culture, Alkaline Phosphatase (ALP) and Alizarin Red S Staining were performed again and the cells were collected for subsequent experiments including immunofluorescence staining, western blotting, transmission electron microscopy, mitochondrial membrane measurement, and Annexin-V-Fluorescein isothiocyanate (Annexin-V-FITC). Results The optimal Cis A dose that preserved osteoblast viability and activated osteogenesis was 10 µM. It appeared that Cis A (10 µM) decreased apoptosis and augmented autophagy via increasing microtubule-associated protein light chain 3 (LC3)-I/II expressions as well as raising Wnt/β-catenin signal pathway activity. The addition of 3-MA further inhibited osteogenic differentiation and suppressed Wnt/β-catenin signal pathway activity to increase apoptosis while reducing autophagy levels. A combination of Cis A and DKK-1 resulted in higher levels of apoptosis but lower levels of autophagy. Conclusions Cis A appears to be a potent inducer of autophagy and inhibitor of apoptosis in primary osteoblasts by working through the Wnt/β-catenin signal pathway, thereby resulting in enhanced osteogenic differentiation.
Collapse
Affiliation(s)
- Tongying Chen
- Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Fenghe Gao
- Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Dan Luo
- Research Laboratory of Spine Degenerative Disease, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Shihao Wang
- Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Yu Zhao
- Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Shuhua Liu
- Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Jiachun Huang
- Department of Osteoporosis, The Third Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Yanping Lin
- Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Zhihai Zhang
- Department of Osteoporosis, The Third Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Hongxing Huang
- Department of Osteoporosis, The Third Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Lei Wan
- Department of Osteoporosis, The Third Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China
| |
Collapse
|
3
|
Poly(Alizarin Red S) on pyrolytic graphite electrodes as a new multi-electronic system for sensing oxandrolone in urine. Biosens Bioelectron 2021; 185:113234. [PMID: 33945892 DOI: 10.1016/j.bios.2021.113234] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2020] [Revised: 03/29/2021] [Accepted: 04/07/2021] [Indexed: 11/21/2022]
Abstract
This study presents a new polymeric and multielectronic system, the poly-Alizarin Red S (PARS), obtained from the electropolymerization of Alizarin Red S (ARS) dye on an edge-plane pyrolytic graphite electrode (EPPGE) surface. During EPPGE/PARS electrochemical characterization, we identified seven stable and reversible redox peaks in acidic medium (0.10 mol L-1, pH 1.62 KH2PO4), which indicated its mechanisms underlying electropolymerization and electrochemical behavior. To the best of our knowledge, this is the first study to use an EPPGE/PARS electrode to detect oxandrolone (OXA) in artificial urine, where PARS acts as a synthetic receptor for OXA. The interactions of OXA with EPPGE/PARS as well as the properties of PARS were investigated using density functional theory (DFT). Atomic force microscopy (AFM) was used to characterize EPPGE/PARS, and it was found that the PARS polymer formed a semi-globular phase on the EPPGE surface. The limit of detection for OXA found by the sensor was close to 0.50 nmol L-1, with a recovery rate of approximately 100% in artificial urine. In addition to the application proposed in this study, EPPGE/PARS is a low-cost product that could be applied in several devices and processes, such as supercapacitors and electrocatalysis.
Collapse
|
4
|
Feng JQ, Shi DK, Ding WQ, Cheng YJ, Qin SY, Zhang AQ. A Self-Assembled Nanoindicator from Alizarin Red S-Borono-Peptide for Potential Imaging of Cellular Copper(II) Ions. ACS Biomater Sci Eng 2021; 7:3361-3369. [PMID: 34180219 DOI: 10.1021/acsbiomaterials.1c00457] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Recently, smart nanomaterials from peptide self-assembly have received extensive attention in the field of biological and medical applications. Through rationally designing the molecular structure, we constructed a borono-peptide that self-assembled into well-defined nanofibers. Relying on the specific recognition between the vicinal diol compound and boronic acid, a novel alizarin red S (ARS)-borono-peptide (BP) spherical nanoindicator was fabricated, accompanying with the emission of strong fluorescent signal. The fluorescent nanoindicator displayed an intense response to copper(II) ions and underwent the fluorescent "turn-off" due to the strong binding-induced displacement. Originating from the high selectivity toward copper(II) ions, good biocompatibility and cancer cell targeting, the nanoindicator offered the opportunity to image copper(II) ions in cancer cells via fluorescent change.
Collapse
Affiliation(s)
- Jia-Qi Feng
- The Key Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education & Hubei Key Laboratory of Catalysis and Materials Science, South-Central University for Nationalities, Wuhan 430074, P. R. China
| | - Dao-Kun Shi
- The Key Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education & Hubei Key Laboratory of Catalysis and Materials Science, South-Central University for Nationalities, Wuhan 430074, P. R. China
| | - Wen-Qiang Ding
- The Key Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education & Hubei Key Laboratory of Catalysis and Materials Science, South-Central University for Nationalities, Wuhan 430074, P. R. China
| | - Yin-Jia Cheng
- The Key Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education & Hubei Key Laboratory of Catalysis and Materials Science, South-Central University for Nationalities, Wuhan 430074, P. R. China
| | - Si-Yong Qin
- The Key Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education & Hubei Key Laboratory of Catalysis and Materials Science, South-Central University for Nationalities, Wuhan 430074, P. R. China
| | - Ai-Qing Zhang
- The Key Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education & Hubei Key Laboratory of Catalysis and Materials Science, South-Central University for Nationalities, Wuhan 430074, P. R. China
| |
Collapse
|
5
|
Li Y, Liu X, Li B, Zheng Y, Han Y, Chen DF, Yeung KWK, Cui Z, Liang Y, Li Z, Zhu S, Wang X, Wu S. Near-Infrared Light Triggered Phototherapy and Immunotherapy for Elimination of Methicillin-Resistant Staphylococcus aureus Biofilm Infection on Bone Implant. ACS NANO 2020; 14:8157-8170. [PMID: 32585104 DOI: 10.1021/acsnano.0c01486] [Citation(s) in RCA: 101] [Impact Index Per Article: 25.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Clinically, methicillin-resistant Staphylococcus aureus (MRSA) biofilm infection inevitably induces the failure of bone implants. Herein, a hydrophilic and viscous hydrogel of poly(vinyl alcohol) modified with chitosan, polydopamine, and NO release donor was formed on a red phosphorus nanofilm deposited on a titanium implant (Ti-RP/PCP/RSNO). Under the irradiation of near-infrared light (NIR), peroxynitrite (•ONOO-) was formed by the reaction between the released NO and superoxide (•O2-) produced by the RP nanofilm. Specifically, we revealed the antibacterial mechanism of the ONOO- against the MRSA biofilm. In addition, osteogenic differentiation was promoted and inflammatory polarization was regulated by the released NO without NIR irradiation through upregulating the expression of Opn and Ocn genes and TNF-α. The MRSA biofilm was synergistically eradicated by •ONOO-, hyperthermia, and •O2- under NIR irradiation as well as the immunoreaction of the M1 polarization. The in vivo results also confirmed the excellent osteogenesis and biofilm eradication by released NO from the RP/PCP/RSNO system under NIR irradiation, indicating the noninvasive tissue reconstruction of MRSA-infected tissues through phototherapy and immunotherapy.
Collapse
Affiliation(s)
- Yuan Li
- The Key Laboratory of Advanced Ceramics and Machining Technology by the Ministry of Education of China, School of Materials Science & Engineering, Tianjin University, Tianjin 300072, China
| | - Xiangmei Liu
- Hubei Key Laboratory of Polymer Materials, Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional Materials, School of Materials Science & Engineering, Hubei University, Wuhan 430062, China
| | - Bo Li
- State Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China
| | - Yufeng Zheng
- State Key Laboratory for Turbulence and Complex System and Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing 100871, China
| | - Yong Han
- State Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China
| | - Da-Fu Chen
- Beijing JiShuiTan Hospital, Beijing Research Institute Orthopaedics & Traumatology, Lab Bone Tissue Engineering, Beijing 100035, China
| | - Kelvin Wai Kwok Yeung
- Department of Orthopaedics & Traumatology, Li KaShing Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong 999077, China
| | - Zhenduo Cui
- The Key Laboratory of Advanced Ceramics and Machining Technology by the Ministry of Education of China, School of Materials Science & Engineering, Tianjin University, Tianjin 300072, China
| | - Yanqin Liang
- The Key Laboratory of Advanced Ceramics and Machining Technology by the Ministry of Education of China, School of Materials Science & Engineering, Tianjin University, Tianjin 300072, China
| | - Zhaoyang Li
- The Key Laboratory of Advanced Ceramics and Machining Technology by the Ministry of Education of China, School of Materials Science & Engineering, Tianjin University, Tianjin 300072, China
| | - Shengli Zhu
- The Key Laboratory of Advanced Ceramics and Machining Technology by the Ministry of Education of China, School of Materials Science & Engineering, Tianjin University, Tianjin 300072, China
| | - Xianbao Wang
- Hubei Key Laboratory of Polymer Materials, Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional Materials, School of Materials Science & Engineering, Hubei University, Wuhan 430062, China
| | - Shuilin Wu
- The Key Laboratory of Advanced Ceramics and Machining Technology by the Ministry of Education of China, School of Materials Science & Engineering, Tianjin University, Tianjin 300072, China
| |
Collapse
|
6
|
Fan X, Xing L, Ge P, Cong L, Hou Q, Ge Q, Liu R, Zhang W, Zhou G. Electrochemical sensor using gold nanoparticles and plasma pretreated graphene based on the complexes of calcium and Troponin C to detect Ca2+ in meat. Food Chem 2020; 307:125645. [DOI: 10.1016/j.foodchem.2019.125645] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2019] [Revised: 09/18/2019] [Accepted: 10/01/2019] [Indexed: 12/11/2022]
|
7
|
Siriwardhane T, Ou Y, Pathirathna P, Hashemi P. Analysis of Electrochemically Elusive Trace Metals with Carbon Fiber Microelectrodes. Anal Chem 2018; 90:11917-11924. [PMID: 30152681 DOI: 10.1021/acs.analchem.8b02210] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
There is great interest in rapidly monitoring metals of biological and environmental interest. Electrochemistry is traditionally a powerful tool for metal analysis but can be limited by its scope and low temporal resolution. The scope is limited by the potential window of the working electrode and rapid analysis is limited, in part, by the need for nucleation/growth for preconcentration. In prior work, we showed that a rapid equilibrium mediated preconcentration process facilitated fast scan cyclic voltammetry (FSCV) responses to Cu(II) and Pb(II) at carbon fiber microelectrodes (CFMs). In this manuscript, we apply this same principle to Ca(II), Al(III), Mg(II), and Zn(II), metal ions that are traditionally difficult to electroanalyze. We demonstrate FSCV reduction peaks for these four metals whose positions and amplitudes are dependent on scan rate. The adsorption profiles of these ions onto CFMs follow Langmuir's theory for monolayer coverage. We calculate the thermodynamic equilibrium constant of metal adsorption onto CFMs and find that these constants follow the same order as those previously reported by other groups on other activated carbon materials. Finally, a real-time complexation study is performed with ligands that have preference for divalent or multivalent ions to probe the selectivity of the real-time signal. We observe a linear relationship between formation constant ( kf) and % change in the FSCV signal and use this correlation to, for the first time, report the kf of an Al(III)-complex. This work demonstrates the versatility of FSCV as a method with capacity to extend the scope of rapid electroanalysis.
Collapse
Affiliation(s)
- Thushani Siriwardhane
- Department of Chemistry and Biochemistry , University of South Carolina , 631 Sumter Street , Columbia , South Carolina 29208 , United States
| | - Yangguang Ou
- Department of Chemistry and Biochemistry , University of South Carolina , 631 Sumter Street , Columbia , South Carolina 29208 , United States
| | - Pavithra Pathirathna
- Department of Chemistry and Biochemistry , University of South Carolina , 631 Sumter Street , Columbia , South Carolina 29208 , United States
| | - Parastoo Hashemi
- Department of Chemistry and Biochemistry , University of South Carolina , 631 Sumter Street , Columbia , South Carolina 29208 , United States
| |
Collapse
|
8
|
Basheer SM, Haribabu J, Bhuvanesh NS, Karvembu R, Sreekanth A. Naphthalenyl appended semicarbazone as “turn on” fluorescent chemosensor for selective recognition of fluoride ion. J Mol Struct 2017. [DOI: 10.1016/j.molstruc.2017.05.056] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
|
9
|
Takahashi S, Suzuki I, Sugawara T, Seno M, Minaki D, Anzai JI. Alizarin Red S-Confined Layer-By-Layer Films as Redox-Active Coatings on Electrodes for the Voltammetric Determination of L-Dopa. MATERIALS (BASEL, SWITZERLAND) 2017; 10:E581. [PMID: 28772942 PMCID: PMC5552174 DOI: 10.3390/ma10060581] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/24/2017] [Revised: 05/23/2017] [Accepted: 05/23/2017] [Indexed: 11/17/2022]
Abstract
The preparation of redox-active coatings is a key step in fabricating electrochemical biosensors. To this goal, a variety of coating materials have been used in combination with redox-active compounds. In this study, alizarin red S (ARS) was confined in layer-by-layer (LbL) films composed of poly(ethyleneimine) (PEI) and carboxymethylcellulose (CMC) to study the redox properties. A gold (Au) disc electrode coated with PEI/CMC LbL film was immersed in an ARS solution to uptake ARS into the film. ARS was successfully confined in the LbL film through electrostatic interactions. The cyclic voltammogram (CV) of ARS-confined PEI/CMC film-coated electrodes thus prepared exhibited redox waves in the potential range from -0.5 to -0.7 V originating from 9,10-anthraquinone moiety in ARS, demonstrating that ARS preserves its redox activity in the LbL film. An additional oxidation peak appeared around -0.4 V in the CV recorded in the solution containing phenylboronic acid (PBA), due to the formation of a boronate ester of ARS (ARS-PBA) in the film. The oxidation peak current at -0.4 V decreased upon addition of 3,4-dihydroxyphenylalanine (L-dopa) to the solution. Thus, the results suggest a potential use of the ARS-confined PEI/CMC films for constructing voltammetric sensors for L-dopa.
Collapse
Affiliation(s)
- Shigehiro Takahashi
- Faculty of Pharmacy, Takasaki University of Health and Welfare, 37-1 Nakaorui, Takasaki 370-0033, Japan.
| | - Iwao Suzuki
- Faculty of Pharmacy, Takasaki University of Health and Welfare, 37-1 Nakaorui, Takasaki 370-0033, Japan.
| | - Tatsuro Sugawara
- Graduate School of Pharmaceutical Sciences, Tohoku University, Aramaki, Aoba-ku, Sendai 980-8578, Japan.
| | - Masaru Seno
- Graduate School of Pharmaceutical Sciences, Tohoku University, Aramaki, Aoba-ku, Sendai 980-8578, Japan.
| | - Daichi Minaki
- Graduate School of Pharmaceutical Sciences, Tohoku University, Aramaki, Aoba-ku, Sendai 980-8578, Japan.
| | - Jun-Ichi Anzai
- Graduate School of Pharmaceutical Sciences, Tohoku University, Aramaki, Aoba-ku, Sendai 980-8578, Japan.
| |
Collapse
|
10
|
Labib M, Sargent EH, Kelley SO. Electrochemical Methods for the Analysis of Clinically Relevant Biomolecules. Chem Rev 2016; 116:9001-90. [DOI: 10.1021/acs.chemrev.6b00220] [Citation(s) in RCA: 555] [Impact Index Per Article: 69.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Mahmoud Labib
- Department
of Pharmaceutical Sciences, University of Toronto, Toronto, Ontario M5S 3M2, Canada
| | | | - Shana O. Kelley
- Department
of Pharmaceutical Sciences, University of Toronto, Toronto, Ontario M5S 3M2, Canada
- Institute
of Biomaterials and Biomedical Engineering, University of Toronto, Toronto, Ontario M5S 3G4, Canada
| |
Collapse
|
11
|
Atluri K, Seabold D, Hong L, Elangovan S, Salem AK. Nanoplex-Mediated Codelivery of Fibroblast Growth Factor and Bone Morphogenetic Protein Genes Promotes Osteogenesis in Human Adipocyte-Derived Mesenchymal Stem Cells. Mol Pharm 2015; 12:3032-42. [PMID: 26121311 PMCID: PMC4613810 DOI: 10.1021/acs.molpharmaceut.5b00297] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
This study highlights the importance of transfection mediated coordinated bone morphogenetic protein 2 (BMP-2) and fibroblast growth factor 2 (FGF-2) signaling in promoting osteogenesis. We employed plasmids independently encoding BMP-2 and FGF-2 complexed with polyethylenimine (PEI) to transfect human adipose derived mesenchymal stem cells (hADMSCs) in vitro. The nanoplexes were characterized for size, surface charge, in vitro cytotoxicity, and transfection ability in hADMSCs. A significant enhancement in BMP-2 protein secretion was observed on day 7 post-transfection of hADMSCs with PEI nanoplexes loaded with both pFGF-2 and pBMP-2 (PEI/(pFGF-2+pBMP-2)) versus transfection with PEI nanoplexes of either pFGF-2 alone or pBMP-2 alone. Osteogenic differentiation of transfected hADMSCs was determined by measuring osteocalcin and Runx-2 gene expression using real time polymerase chain reactions. A significant increase in the expression of Runx-2 and osteocalcin was observed on day 3 and day 7 post-transfection, respectively, by cells transfected with PEI/(pFGF-2+pBMP-2) compared to cells transfected with nanoplexes containing pFGF-2 or pBMP-2 alone. Alizarin Red staining and atomic absorption spectroscopy revealed elevated levels of calcium deposition in hADMSC cultures on day 14 and day 30 post-transfection with PEI/(pFGF-2+pBMP-2) compared to other treatments. We have shown that codelivery of pFGF-2 and pBMP-2 results in a significant enhancement in osteogenic protein synthesis, osteogenic marker expression, and subsequent mineralization. This research points to a new clinically translatable strategy for achieving efficient bone regeneration.
Collapse
Affiliation(s)
- Keerthi Atluri
- †Division of Pharmaceutics and Translational Therapeutics, College of Pharmacy, The University of Iowa, Iowa City, Iowa 52242, United States
| | - Denise Seabold
- ‡Department of Periodontics, College of Dentistry, The University of Iowa, Iowa City, Iowa 52242, United States
| | - Liu Hong
- ‡Department of Periodontics, College of Dentistry, The University of Iowa, Iowa City, Iowa 52242, United States
| | - Satheesh Elangovan
- ‡Department of Periodontics, College of Dentistry, The University of Iowa, Iowa City, Iowa 52242, United States
| | - Aliasger K Salem
- †Division of Pharmaceutics and Translational Therapeutics, College of Pharmacy, The University of Iowa, Iowa City, Iowa 52242, United States
- ‡Department of Periodontics, College of Dentistry, The University of Iowa, Iowa City, Iowa 52242, United States
| |
Collapse
|