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Gaihre B, Potes MDA, Liu X, Tilton M, Camilleri E, Rezaei A, Serdiuk V, Park S, Lucien F, Terzic A, Lu L. Extrusion 3D-printing and characterization of poly(caprolactone fumarate) for bone regeneration applications. J Biomed Mater Res A 2024; 112:672-684. [PMID: 37971074 PMCID: PMC10948318 DOI: 10.1002/jbm.a.37646] [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: 07/17/2023] [Revised: 10/18/2023] [Accepted: 10/30/2023] [Indexed: 11/19/2023]
Abstract
Polycaprolactone fumarate (PCLF) is a cross-linkable PCL derivative extensively considered for tissue engineering applications. Although injection molding has been widely used to develop PCLF scaffolds, platforms developed using such technique lack precise control on architecture, design, and porosity required to ensure adequate cellular and tissue responses. In particular, the scaffolds should provide a suitable surface for cell attachment and proliferation, and facilitate cell-cell communication and nutrient flow. 3D printing technologies have led to new architype for biomaterial development with micro-architecture mimicking native tissue. Here, we developed a method for 3D printing of PCLF structures using the extrusion printing technique. The crosslinking property of PCLF enabled the unique post-processing of 3D printed scaffolds resulting in highly porous and flexible PCLF scaffolds with compressive properties imitating natural features of cancellous bone. Generated scaffolds supported excellent attachment and proliferation of mesenchymal stem cells (MSC). The high porosity of PCLF scaffolds facilitated vascularized membrane formation demonstrable with the stringency of the ex ovo chicken chorioallantoic membrane (CAM) implantation. Furthermore, upon implantation to rat calvarium defects, PCLF scaffolds enabled an exceptional new bone formation with a bone mineral density of newly formed bone mirroring native bone tissue. These studies suggest that the 3D-printed highly porous PCLF scaffolds may serve as a suitable biomaterial platform to significantly expand the utility of the PCLF biomaterial for bone tissue engineering applications.
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Affiliation(s)
- Bipin Gaihre
- Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, Minnesota, USA
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, Minnesota, USA
| | - Maria D Astudillo Potes
- Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, Minnesota, USA
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, Minnesota, USA
| | - Xifeng Liu
- Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, Minnesota, USA
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, Minnesota, USA
| | - Maryam Tilton
- Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, Minnesota, USA
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, Minnesota, USA
| | - Emily Camilleri
- Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, Minnesota, USA
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, Minnesota, USA
| | - Asghar Rezaei
- Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, Minnesota, USA
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, Minnesota, USA
| | - Vitalii Serdiuk
- Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, Minnesota, USA
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, Minnesota, USA
| | - Sungjo Park
- Department of Cardiovascular Diseases and Center for Regenerative Medicine, Mayo Clinic, Rochester, Minnesota, USA
| | - Fabrice Lucien
- Department of Urology, Mayo Clinic, Rochester, Minnesota, USA
| | - Andre Terzic
- Department of Cardiovascular Diseases and Center for Regenerative Medicine, Mayo Clinic, Rochester, Minnesota, USA
| | - Lichun Lu
- Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, Minnesota, USA
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, Minnesota, USA
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2
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Qayoom I, Prasad A, Srivastava E, Fazili KM, Nussler AK, Kumar A. Organic-inorganic composite of polypropylene fumarate and nanohydroxyapatite as carrier of antibiotics for the treatment of bone infections. Biomater Adv 2024; 157:213714. [PMID: 38096647 DOI: 10.1016/j.bioadv.2023.213714] [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: 02/16/2023] [Revised: 10/27/2023] [Accepted: 11/26/2023] [Indexed: 02/02/2024]
Abstract
Current treatment approaches in clinics to treat the infectious lesions have partial success thus demanding the need for development of advanced treatment modalities. In this study we fabricated an organic-inorganic composite of polypropylene fumarate (PPF) and nanohydroxyapatite (nHAP) by photo-crosslinking as a carrier of two clinically used antibiotics, ciprofloxacin (CIP) and rifampicin (RFP) for the treatment of bone infections. Carboxy terminal-PPF was first synthesized by cis-trans isomerization of maleic anhydride which was then photo-crosslinked using diethylfumarate (DEF) as crosslinker and bis-acylphosphine oxide (BAPO) as photo-initiator under UV lights (P). A composite of PPF and nHAP was fabricated by incorporating 40 % of nHAP in the polymeric matrix of PPF (PH) which was then characterized for different physicochemical parameters. CIP was added along with nHAP to fabricated CIPloaded composite scaffolds (PHC) which was then coated with RFP to synthesize RFP coated CIP-loaded scaffolds (PHCR). It was observed that there was a temporal separation in the in vitro release of two antibiotics after coating PHC with RFP with 80.48 ± 0.40 % release of CIP from PHC and 62.43 ± 0.21 % release of CIP from PHCR for a period of 60 days. Moreover, in vitro protein adsorption was also found to be maximum in PHCR (154.95 ± 0.07 μg/mL) as observed in PHC (75.42 ± 0.06 μg/mL), PH (24.47 ± 0.08 μg/mL) and P alone (4.47 ± 0.02 μg/mL). The scaffolds were also evaluated using in vivo infection model to assess their capacity in reducing the bacterial burden at the infection site. The outcome of this study suggests that RFP coated CIP-loaded PPF composite scaffolds could reduce bacterial burden and simultaneously augment bone healing during infection related fractures.
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Affiliation(s)
- Irfan Qayoom
- Department of Biological Sciences and Bioengineering, Indian Institute of Technology Kanpur, Kanpur 208016, UP, India
| | - Abhay Prasad
- Department of Biological Sciences and Bioengineering, Indian Institute of Technology Kanpur, Kanpur 208016, UP, India
| | - Ekta Srivastava
- Department of Biological Sciences and Bioengineering, Indian Institute of Technology Kanpur, Kanpur 208016, UP, India
| | - Khalid Majid Fazili
- Department of Biotechnology, University of Kashmir, Srinagar 190006, Jammu and Kashmir, India
| | - Andreas K Nussler
- Siegfried Weller Research Institute at the BG Trauma Center Tübingen, Department of Trauma and Reconstructive Surgery, University of Tübingen, Tübingen 72076, Germany
| | - Ashok Kumar
- Department of Biological Sciences and Bioengineering, Indian Institute of Technology Kanpur, Kanpur 208016, UP, India; Centre for Environmental Science and Engineering, Indian Institute of Technology Kanpur, Kanpur 208016, UP, India; Center for Nanosciences, Indian Institute of Technology Kanpur, Kanpur 208016, UP, India; The Mehta Family Centre for Engineering in Medicine, Indian Institute of Technology Kanpur, Kanpur 208016, UP, India; Centre of Excellence for Orthopedics and Prosthetics, Gangwal School of Medical Sciences and Technology, Indian Institute of Technology Kanpur, Kanpur 208016, UP, India.
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3
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Li P, Guo K, Fu L, Wang B, Zhang B, Gong N, Lu Y, Ma C, Huang H, Lu Y, Li G. Solubility-driven optimization of benzothiopyranone salts leading to a preclinical candidate with improved pharmacokinetic properties and activity against Mycobacterium tuberculosis. Eur J Med Chem 2023; 246:114993. [PMID: 36495631 DOI: 10.1016/j.ejmech.2022.114993] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2022] [Revised: 11/26/2022] [Accepted: 11/28/2022] [Indexed: 12/03/2022]
Abstract
Solubility-driven optimization of the salts of nitro benzothiopyranone 1, which targets DprE1, led to an antimycobacterial preclinical candidate 2. Five pharmaceutically acceptable salts, including the maleate (2), fumarate (3), citrate (4, 5), and l-malate (6) of compound 1, were prepared via the salt formation reaction and evaluated for their physicochemical and pharmacokinetic properties. Compared with 1, all the target salts exhibited greatly increased aqueous solubility and improved oral bioavailability in mice. Maleate salt 2, which displayed higher chemical stability and lower log P, showed substantially improved bioavailability in rats and a much better in vivo effect compared with free base 1 at the same dose. The X-ray crystal structure of 2 revealed that the exposed hydrophilic piperazine-maleate moiety in the crystal structure cell may be critical in increasing the solubility of 2. Thus, this maleate salt 2 overcame the poor druggability of benzothiopyranone derivatives and was identified as a promising preclinical candidate for treating tuberculosis.
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Affiliation(s)
- Peng Li
- Beijing Key Laboratory of Active Substance Discovery and Druggability Evaluation, Chinese Academy of Medical Sciences Key Laboratory of Anti-DR TB Innovative Drug Research, Institute of Materia Medica, Peking Union Medical College, Chinese Academy of Medical Sciences, 1 Xian Nong Tan Street, Beijing, 100050, PR China
| | - Kaijing Guo
- Beijing Key Laboratory of Active Substance Discovery and Druggability Evaluation, Chinese Academy of Medical Sciences Key Laboratory of Anti-DR TB Innovative Drug Research, Institute of Materia Medica, Peking Union Medical College, Chinese Academy of Medical Sciences, 1 Xian Nong Tan Street, Beijing, 100050, PR China
| | - Lei Fu
- Beijing Key Laboratory of Drug Resistance Tuberculosis Research, Department of Pharmacology, Beijing Tuberculosis and Thoracic Tumor Research Institute, Beijing Chest Hospital, Capital Medical University, 97 Ma Chang Street, Beijing, 101149, PR China
| | - Bin Wang
- Beijing Key Laboratory of Drug Resistance Tuberculosis Research, Department of Pharmacology, Beijing Tuberculosis and Thoracic Tumor Research Institute, Beijing Chest Hospital, Capital Medical University, 97 Ma Chang Street, Beijing, 101149, PR China
| | - Baoxi Zhang
- Beijing Key Laboratory of Polymorphic Drugs, Institute of Materia Medica, Peking Union Medical College, Chinese Academy of Medical Sciences, 1 Xian Nong Tan Street, Beijing, 100050, PR China
| | - Ningbo Gong
- Beijing Key Laboratory of Polymorphic Drugs, Institute of Materia Medica, Peking Union Medical College, Chinese Academy of Medical Sciences, 1 Xian Nong Tan Street, Beijing, 100050, PR China
| | - Yang Lu
- Beijing Key Laboratory of Polymorphic Drugs, Institute of Materia Medica, Peking Union Medical College, Chinese Academy of Medical Sciences, 1 Xian Nong Tan Street, Beijing, 100050, PR China
| | - Chen Ma
- Beijing Key Laboratory of Active Substance Discovery and Druggability Evaluation, Chinese Academy of Medical Sciences Key Laboratory of Anti-DR TB Innovative Drug Research, Institute of Materia Medica, Peking Union Medical College, Chinese Academy of Medical Sciences, 1 Xian Nong Tan Street, Beijing, 100050, PR China
| | - Haihong Huang
- Beijing Key Laboratory of Active Substance Discovery and Druggability Evaluation, Chinese Academy of Medical Sciences Key Laboratory of Anti-DR TB Innovative Drug Research, Institute of Materia Medica, Peking Union Medical College, Chinese Academy of Medical Sciences, 1 Xian Nong Tan Street, Beijing, 100050, PR China.
| | - Yu Lu
- Beijing Key Laboratory of Drug Resistance Tuberculosis Research, Department of Pharmacology, Beijing Tuberculosis and Thoracic Tumor Research Institute, Beijing Chest Hospital, Capital Medical University, 97 Ma Chang Street, Beijing, 101149, PR China.
| | - Gang Li
- Beijing Key Laboratory of Active Substance Discovery and Druggability Evaluation, Chinese Academy of Medical Sciences Key Laboratory of Anti-DR TB Innovative Drug Research, Institute of Materia Medica, Peking Union Medical College, Chinese Academy of Medical Sciences, 1 Xian Nong Tan Street, Beijing, 100050, PR China.
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4
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Hesse F, Wright AJ, Bulat F, Somai V, Kreis F, Brindle KM. Deuterium MRSI of tumor cell death in vivo following oral delivery of 2 H-labeled fumarate. Magn Reson Med 2022; 88:2014-2020. [PMID: 35816502 PMCID: PMC9545469 DOI: 10.1002/mrm.29379] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2022] [Revised: 05/25/2022] [Accepted: 06/16/2022] [Indexed: 01/07/2023]
Abstract
PURPOSE There is an unmet clinical need for direct and sensitive methods to detect cell death in vivo, especially with regard to monitoring tumor treatment response. We have shown previously that tumor cell death can be detected in vivo from 2 H MRS and MRSI measurements of increased [2,3-2 H2 ]malate production following intravenous injection of [2,3-2 H2 ]fumarate. We show here that cell death can be detected with similar sensitivity following oral administration of the 2 H-labeled fumarate. METHODS Mice with subcutaneously implanted EL4 tumors were fasted for 1 h before administration (200 μl) of [2,3-2 H2 ]fumarate (2 g/kg bodyweight) via oral gavage without anesthesia. The animals were then anesthetized, and after 30 min, tumor conversion of [2,3-2 H2 ]fumarate to [2,3-2 H2 ]malate was assessed from a series of 13 2 H spectra acquired over a period of 65 min. The 2 H spectra and 2 H spectroscopic images were acquired using a surface coil before and at 48 h after treatment with a chemotherapeutic drug (etoposide, 67 mg/kg). RESULTS The malate/fumarate signal ratio increased from 0.022 ± 0.03 before drug treatment to 0.12 ± 0.04 following treatment (p = 0.023, n = 4). Labeled malate was undetectable in spectroscopic images acquired before treatment and increased in the tumor area following treatment. The increase in the malate/fumarate signal ratio was similar to that observed previously following intravenous administration of labeled fumarate. CONCLUSION Orally administered [2,3-2 H2 ]fumarate can be used to detect tumor cell death noninvasively following treatment with a sensitivity that is similar to that obtained with intravenous administration.
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Affiliation(s)
| | | | - Flaviu Bulat
- Cancer Research UK Cambridge Institute
CambridgeUK
- Department of ChemistryUniversity of CambridgeCambridgeUK
| | - Vencel Somai
- Cancer Research UK Cambridge Institute
CambridgeUK
- Department of RadiologyUniversity of CambridgeCambridgeUK
| | - Felix Kreis
- Cancer Research UK Cambridge Institute
CambridgeUK
| | - Kevin M. Brindle
- Cancer Research UK Cambridge Institute
CambridgeUK
- Department of BiochemistryUniversity of CambridgeCambridgeUK
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Stewart NJ, Nakano H, Sugai S, Tomohiro M, Kase Y, Uchio Y, Yamaguchi T, Matsuo Y, Naganuma T, Takeda N, Nishimura I, Hirata H, Hashimoto T, Matsumoto S. Hyperpolarized 13 C Magnetic Resonance Imaging of Fumarate Metabolism by Parahydrogen-induced Polarization: A Proof-of-Concept in vivo Study. Chemphyschem 2021; 22:915-923. [PMID: 33590933 PMCID: PMC8251594 DOI: 10.1002/cphc.202001038] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [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: 12/23/2020] [Revised: 02/11/2021] [Indexed: 01/18/2023]
Abstract
Hyperpolarized [1-13 C]fumarate is a promising magnetic resonance imaging (MRI) biomarker for cellular necrosis, which plays an important role in various disease and cancerous pathological processes. To demonstrate the feasibility of MRI of [1-13 C]fumarate metabolism using parahydrogen-induced polarization (PHIP), a low-cost alternative to dissolution dynamic nuclear polarization (dDNP), a cost-effective and high-yield synthetic pathway of hydrogenation precursor [1-13 C]acetylenedicarboxylate (ADC) was developed. The trans-selectivity of the hydrogenation reaction of ADC using a ruthenium-based catalyst was elucidated employing density functional theory (DFT) simulations. A simple PHIP set-up was used to generate hyperpolarized [1-13 C]fumarate at sufficient 13 C polarization for ex vivo detection of hyperpolarized 13 C malate metabolized from fumarate in murine liver tissue homogenates, and in vivo 13 C MR spectroscopy and imaging in a murine model of acetaminophen-induced hepatitis.
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Affiliation(s)
- Neil J. Stewart
- Division of Bioengineering & BioinformaticsGraduate School of Information Science & TechnologyHokkaido UniversityNorth 14, West 9, Kita-ku, SapporoHokkaido060-0814Japan
| | - Hitomi Nakano
- Division of Bioengineering & BioinformaticsGraduate School of Information Science & TechnologyHokkaido UniversityNorth 14, West 9, Kita-ku, SapporoHokkaido060-0814Japan
| | - Shuto Sugai
- Division of Bioengineering & BioinformaticsGraduate School of Information Science & TechnologyHokkaido UniversityNorth 14, West 9, Kita-ku, SapporoHokkaido060-0814Japan
| | - Mitsushi Tomohiro
- Division of Bioengineering & BioinformaticsGraduate School of Information Science & TechnologyHokkaido UniversityNorth 14, West 9, Kita-ku, SapporoHokkaido060-0814Japan
| | - Yuki Kase
- Division of Bioengineering & BioinformaticsGraduate School of Information Science & TechnologyHokkaido UniversityNorth 14, West 9, Kita-ku, SapporoHokkaido060-0814Japan
| | - Yoshiki Uchio
- Division of Bioengineering & BioinformaticsGraduate School of Information Science & TechnologyHokkaido UniversityNorth 14, West 9, Kita-ku, SapporoHokkaido060-0814Japan
| | - Toru Yamaguchi
- Division of Computational ChemistryTransition State Technology Co. Ltd.2-16-1 Tokiwadai, UbeYamaguchi755-8611Japan
| | - Yujirou Matsuo
- Division of Computational ChemistryTransition State Technology Co. Ltd.2-16-1 Tokiwadai, UbeYamaguchi755-8611Japan
| | - Tatsuya Naganuma
- R&D DepartmentJapan REDOX Ltd.4-29-49-805 Chiyo, Hakata-kuFukuoka812-0044Japan
| | - Norihiko Takeda
- Division of Cardiology and MetabolismCenter for Molecular MedicineJichi Medical University3311-1 Yakushiji, Shimotsuke-shiTochigi329-0498Japan
| | - Ikuya Nishimura
- Division of Bioengineering & BioinformaticsGraduate School of Information Science & TechnologyHokkaido UniversityNorth 14, West 9, Kita-ku, SapporoHokkaido060-0814Japan
| | - Hiroshi Hirata
- Division of Bioengineering & BioinformaticsGraduate School of Information Science & TechnologyHokkaido UniversityNorth 14, West 9, Kita-ku, SapporoHokkaido060-0814Japan
| | - Takuya Hashimoto
- Chiba Iodine Resource Innovation Center and Department of ChemistryGraduate School of ScienceChiba University1-33 Yayoi-cho, Inage-kuChiba263-8522Japan
| | - Shingo Matsumoto
- Division of Bioengineering & BioinformaticsGraduate School of Information Science & TechnologyHokkaido UniversityNorth 14, West 9, Kita-ku, SapporoHokkaido060-0814Japan
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Sohn JS, Kim JS, Choi JS. Development of a naftopidil-chitosan-based fumaric acid solid dispersion to improve the dissolution rate and stability of naftopidil. Int J Biol Macromol 2021; 176:520-529. [PMID: 33607140 DOI: 10.1016/j.ijbiomac.2021.02.096] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2020] [Revised: 01/25/2021] [Accepted: 02/13/2021] [Indexed: 11/18/2022]
Abstract
Naftopidil (NAF), an α1-adrenoceptor antagonist, is administered as a treatment for benign prostatic hyperplasia; however, according to the Biopharmaceutical Classification System (BCS IV), it is a poorly-soluble drug that exhibits poor permeability. We aimed to increase the dissolution (%) of NAF by adding chitosan to a polymer-free formulation. Compared to the formulation prepared using Flivas®, at 60 min, the solid dispersion (SD) formulation containing NAF, fumaric acid, chitosan, and US2® in a 1:1:2:1 weight ratio improved the dissolution (%) of NAF in distilled water, pH 1.2 media, pH 4.0 and pH 6.8 buffers by 27.2-, 1.2-, 1.1- and 6.5-fold, respectively. The physicochemical properties of the SD1 formulation were also found to be altered, including its thermal properties, crystal intensity, and chemical interaction. As a result, the hydrogen bonding that occurs between NAF and fumaric acid was identified as a major factor in the increase in NAF dissolution (%). Further, chitosan was observed to contribute to the stability of NAF and SD1, which was assessed over a 3-month period. To our knowledge, this is the first study to employ a polymer-free system to improve the solubilization of NAF.
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Affiliation(s)
- Jeong Sun Sohn
- College of General Education, Chosun University, Gwangju 61452, Republic of Korea
| | - Jae-Seon Kim
- Central R&D Center, Yuyu Phama, 17, Daehak4-ro, Yeongtong-gu, Suwon-si, Gyeonggi-do, Republic of Korea
| | - Jin-Seok Choi
- Department of Health Care and Medical Administration, Chodang University, 380 Muan-ro, Muan-eup, Muan-gun, Jeollanam-do 58530, Republic of Korea.
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Di Muzio S, Ramondo F, Gontrani L, Ferella F, Nardone M, Benassi P. Choline Hydrogen Dicarboxylate Ionic Liquids by X-ray Scattering, Vibrational Spectroscopy and Molecular Dynamics: H-Fumarate and H-Maleate and Their Conformations. Molecules 2020; 25:E4990. [PMID: 33126573 PMCID: PMC7663696 DOI: 10.3390/molecules25214990] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2020] [Revised: 10/18/2020] [Accepted: 10/24/2020] [Indexed: 11/30/2022] Open
Abstract
We explore the structure of two ionic liquids based on the choline cation and the monoanion of the maleic acid. We consider two isomers of the anion (H-maleate, the cis-isomer and H-fumarate, the trans-isomer) having different physical chemical properties. H-maleate assumes a closed structure and forms a strong intramolecular hydrogen bond whereas H-fumarate has an open structure. X-ray diffraction, infrared and Raman spectroscopy and molecular dynamics have been used to provide a reliable picture of the interactions which characterize the structure of the fluids. All calculations indicate that the choline cation prefers to connect mainly to the carboxylate group through OH⋯O interactions in both the compounds and orient the charged head N(CH3)3+ toward the negative portion of the anion. However, the different structure of the two anions affects the distribution of the ionic components in the fluid. The trans conformation of H-fumarate allows further interactions between anions through COOH and CO2- groups whereas intramolecular hydrogen bonding in H-maleate prevents this association. Our theoretical findings have been validated by comparing them with experimental X-ray data and infrared and Raman spectra.
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Affiliation(s)
- Simone Di Muzio
- Department of Physical and Chemical Sciences, University of L’Aquila, Via Vetoio, I-67100 L’Aquila, Italy; (S.D.M.); (F.F.); (M.N.); (P.B.)
| | - Fabio Ramondo
- Department of Chemistry, University of Rome La Sapienza, P.le A. Moro 5, 00185 Rome, Italy;
| | - Lorenzo Gontrani
- Department of Chemistry, University of Rome La Sapienza, P.le A. Moro 5, 00185 Rome, Italy;
| | - Francesco Ferella
- Department of Physical and Chemical Sciences, University of L’Aquila, Via Vetoio, I-67100 L’Aquila, Italy; (S.D.M.); (F.F.); (M.N.); (P.B.)
- INFN, Gran Sasso National Laboratories, I-67100 Assergi (AQ), Italy
| | - Michele Nardone
- Department of Physical and Chemical Sciences, University of L’Aquila, Via Vetoio, I-67100 L’Aquila, Italy; (S.D.M.); (F.F.); (M.N.); (P.B.)
| | - Paola Benassi
- Department of Physical and Chemical Sciences, University of L’Aquila, Via Vetoio, I-67100 L’Aquila, Italy; (S.D.M.); (F.F.); (M.N.); (P.B.)
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8
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Hegner R, Neubert K, Kroner C, Holtmann D, Harnisch F. Coupled Electrochemical and Microbial Catalysis for the Production of Polymer Bricks. ChemSusChem 2020; 13:5295-5300. [PMID: 32658366 PMCID: PMC7590143 DOI: 10.1002/cssc.202001272] [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] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/20/2020] [Revised: 06/29/2020] [Indexed: 06/11/2023]
Abstract
Power-to-X technologies have the potential to pave the way towards a future resource-secure bioeconomy as they enable the exploitation of renewable resources and CO2 . Herein, the coupled electrocatalytic and microbial catalysis of the C5 -polymer precursors mesaconate and 2S-methylsuccinate from CO2 and electric energy by in situ coupling electrochemical and microbial catalysis at 1 L-scale was developed. In the first phase, 6.1±2.5 mm formate was produced by electrochemical CO2 reduction. In the second phase, formate served as the substrate for microbial catalysis by an engineered strain of Methylobacterium extorquens AM-1 producing 7±2 μm and 10±5 μm of mesaconate and 2S-methylsuccinate, respectively. The proof of concept showed an overall conversion efficiency of 0.2 % being 0.4 % of the theoretical maximum.
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Affiliation(s)
- Richard Hegner
- Helmholtz Center for Environmental Research GmbH – UFZDepartment of Environmental MicrobiologyPermoserstraße 1504318LeipzigGermany
| | - Katharina Neubert
- Helmholtz Center for Environmental Research GmbH – UFZDepartment of Environmental MicrobiologyPermoserstraße 1504318LeipzigGermany
| | - Cora Kroner
- DECHEMA Research InstituteIndustrial BiotechnologyTheodor-Heuss-Allee 2560486Frankfurt am MainGermany
| | - Dirk Holtmann
- DECHEMA Research InstituteIndustrial BiotechnologyTheodor-Heuss-Allee 2560486Frankfurt am MainGermany
- Technische Hochschule MittelhessenInstitute of Bioprocess Engineering and Pharmaceutical TechnologyWiesenstraße 1435390GießenGermany
| | - Falk Harnisch
- Helmholtz Center for Environmental Research GmbH – UFZDepartment of Environmental MicrobiologyPermoserstraße 1504318LeipzigGermany
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9
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Zhou Q, Shen Y, Li Y, Xu L, Cai Y, Deng X. Terahertz spectroscopic characterizations and DFT calculations of carbamazepine cocrystals with nicotinamide, saccharin and fumaric acid. Spectrochim Acta A Mol Biomol Spectrosc 2020; 236:118346. [PMID: 32302958 DOI: 10.1016/j.saa.2020.118346] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [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: 03/02/2020] [Revised: 04/05/2020] [Accepted: 04/05/2020] [Indexed: 06/11/2023]
Abstract
Carbamazepine cocrystals with nicotinamide, saccharin and fumaric acid were synthesized and characterized by time-domain terahertz spectroscopy. Lattice vibrations of cocrystals with their individual constituents were investigated by means of the dispersion-corrected density functional theory with and without cell parameter constraints. The simulated THz spectra successfully reproduce the features of all the crystals in their experimental spectra. A better agreement between experimental and theoretical THz spectra is achieved when the cell parameter constraints are applied in geometry optimization. Some intensive modes of neat carbamazepine and cocrystals were discussed in terms of the motions of hydrogen bonds. The effect of lattice vibration on these cocrystallizations was further examined to gain insights into the thermodynamics. It is found that lattice vibration is favorable for all these cocrystal formations.
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Affiliation(s)
- Qi Zhou
- Department of Physics, School of Sciences, Nanchang University, Xuefu Avenue 999, Nanchang City 330031, China
| | - Yun Shen
- Department of Physics, School of Sciences, Nanchang University, Xuefu Avenue 999, Nanchang City 330031, China
| | - Yin Li
- Department of Physics, School of Sciences, Nanchang University, Xuefu Avenue 999, Nanchang City 330031, China.
| | - Li Xu
- Department of Chemical Engineering and Technology, School of Chemistry, Biology and Materials Science, East China University of Technology, Guanglan Avenue 418, Nanchang City 330013, China
| | - Yingxiang Cai
- Department of Physics, School of Sciences, Nanchang University, Xuefu Avenue 999, Nanchang City 330031, China
| | - Xiaohua Deng
- Department of Physics, School of Sciences, Nanchang University, Xuefu Avenue 999, Nanchang City 330031, China; Institute of Space Science and Technology, Nanchang University, Xuefu Avenue 999, Nanchang City 330031, China
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10
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George MN, Liu X, Miller AL, Xu H, Lu L. Phosphate functionalization and enzymatic calcium mineralization synergistically enhance oligo[poly(ethylene glycol) fumarate] hydrogel osteoconductivity for bone tissue engineering. J Biomed Mater Res A 2020; 108:515-527. [PMID: 31702863 PMCID: PMC7224962 DOI: 10.1002/jbm.a.36832] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [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: 05/20/2019] [Revised: 09/28/2019] [Accepted: 10/10/2019] [Indexed: 12/22/2022]
Abstract
A current approach in bone tissue engineering is the implantation of polymeric scaffolds that promote osteoblast attachment and growth as well as biomineralization. One promising polymer is oligo[poly(ethylene glycol) fumarate] (OPF), a polyethylene glycol-based material that is biocompatible, injectable, and biodegradable, but in its native form does not support robust bone cell attachment or growth. To address this issue, this study evaluated the osteoconductivity of bis[02-(methacryloyloxy)ethyl] phosphate (BP) functionalized OPF hydrogels (OPF-BP) using MC3T3-E1 pre-osteoblast cells, both before and after enzymatic mineralization with a calcium solution. The inclusion of negatively charged functional groups allowed for the tailored uptake and release of calcium, while also altering the mechanical properties and surface topography of the hydrogel surface. In cell culture, OPF-BP hydrogels with 20 and 30% (w/w) BP optimized osteoblast attachment, proliferation, and differentiation after a 21-day in vitro period. In addition, the OPF-BP30 treatment, when mineralized with calcium, exhibited a 128% increase in osteocalcin expression when compared with the non-mineralized treatment. These findings suggest that phosphate functionalization and enzymatic calcium mineralization can act synergistically to enhance the osteoconductivity of OPF hydrogels, making this processed material an attractive candidate for bone tissue engineering applications.
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Affiliation(s)
- Matthew N. George
- Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, MN 55905, USA
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, MN 55905, USA
| | - Xifeng Liu
- Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, MN 55905, USA
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, MN 55905, USA
| | - A. Lee Miller
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, MN 55905, USA
| | - Haocheng Xu
- Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, MN 55905, USA
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, MN 55905, USA
| | - Lichun Lu
- Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, MN 55905, USA
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, MN 55905, USA
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11
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Basha SI, Ghosh S, Vinothkumar K, Ramesh B, Kumari PHP, Mohan KVM, Sukumar E. Fumaric acid incorporated Ag/agar-agar hybrid hydrogel: A multifunctional avenue to tackle wound healing. Mater Sci Eng C Mater Biol Appl 2020; 111:110743. [PMID: 32279739 DOI: 10.1016/j.msec.2020.110743] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [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: 08/24/2019] [Revised: 02/11/2020] [Accepted: 02/12/2020] [Indexed: 12/30/2022]
Abstract
Wound and its treatment is one of the major health concerns throughout the globe. Various extrinsic and intrinsic factors can influence the dynamics of healing mechanism. One such extrinsic factor is moist environment in wound healing. The advantages of optimum hydration in wound healing are enhanced autolytic debridement, angiogenesis and accelerated cell proliferation and collagen formation. But hydrated wounds often end up with patient's uncomfortability, associated infection, and tissue lipid peroxidation. Healing process prefers antimicrobial, anti-inflammatory and optimum moist microenvironment. Here, we have synthesized fumaric acid incorporated agar-silver hydrogel (AA-Ag-FA); characterized by UV-Visible spectroscopy, FTIR spectroscopy and TEM. The surface morphology is evaluated through SEM. The size of the silver nanoparticles (Ag NPs) was found to be 10-15 nm. The hydrogel shows potential antibacterial effect against Escherichia coli, Staphylococcus aureus and Pseudomonas aeruginosa which are predominantly responsible for wound infection. The gel shows reasonable antioxidant property evaluated through 2,2-diphenyl-1-picrylhydrazyl (DPPH) assay. Topical application of the gel on the wound site heals the wound at much faster rate even compared to standard (Mega heal, Composition: Colloidal silver 32 ppm hydrogel) gel. Histological analysis reveals better tissue proliferation (i.e. epithelialization), more granulation tissue formation, neovascularisation, fibroblast and mature collagen bundles. The lipid peroxidation of wound tissue estimated through malondialdehyde (MDA) assay was found to be reasonably less when treated with AA-Ag-FA hydrogel compared to standard (Mega heal). Cytotoxicity of the samples tested through MTT assay and live-dead cell staining shows its nontoxic biocompatibility nature. In our hydrogel scaffold, the bio-degradable agar-agar provides the moist environment; the Ag NPs inside the gel acts as bactericidal agent and fumaric acid facilities the antioxidant and angiogenesis path implicitly.
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Affiliation(s)
- Syed Ilias Basha
- GITAM Institute of Medical Sciences and Research (GIMSR), Department of Pharmacology, Visakhapatnam, Andhra Pradesh 530045, India; Department of Research and Development, Saveetha Institute of Medical and Technical Sciences (Deemed University), Thandalam, Chennai, Tamilnadu 602105, India
| | - Somnath Ghosh
- Indian Institute of Petroleum and Energy (IIPE), Department of Chemistry, Visakhapatnam, Andhra Pradesh 530003, India.
| | - K Vinothkumar
- VPro Biotech, 51-Arumparthapuram Main Road, Puducherry-605 110, India
| | - B Ramesh
- GITAM Institute of Medical Sciences and Research (GIMSR), Department of Pharmacology, Visakhapatnam, Andhra Pradesh 530045, India
| | - P Hema Praksh Kumari
- GITAM Institute of Medical Sciences and Research (GIMSR), Department of Microbiology, Visakhapatnam, Andhra Pradesh 530045, India
| | - K V Murali Mohan
- GITAM Institute of Medical Sciences and Research (GIMSR), Department of Pathology, Visakhapatnam, Andhra Pradesh 530045, India
| | - E Sukumar
- Department of Research and Development, Saveetha Institute of Medical and Technical Sciences (Deemed University), Thandalam, Chennai, Tamilnadu 602105, India.
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12
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Liu X, Miller AL, Xu H, Waletzki BE, Lu L. Injectable Catalyst-Free Poly(Propylene Fumarate) System Cross-Linked by Strain Promoted Alkyne-Azide Cycloaddition Click Chemistry for Spine Defect Filling. Biomacromolecules 2019; 20:3352-3365. [PMID: 31398020 PMCID: PMC9009285 DOI: 10.1021/acs.biomac.9b00133] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
A new PPF-BCN/hyPCL32-N3 injectable system that can be cross-linked by catalyst-free, strain promoted alkyne-azide cycloaddition (SPAAC) click chemistry was developed for tissue engineering applications. The system consisted of two components: PPF-BCN, poly(propylene fumarate) (PPF) functionalized with (1R,8S,9s)-bicyclo[6.1.0]non-4-yn-9-ylmethanol (BCN-OH), and hyPCL32-N3, a hyper-branched 32-arm poly(ε-caprolactone) (PCL) dendrimer functionalized with azide as the cross-linker core. Fast SPAAC click reaction allowed the desired gelation of the system without using any toxic initiator or catalyst. Compared to the conventional injectable formulation, e.g., poly(methyl methacrylate) (PMMA), our PPF-BCN/hyPCL32-N3 (abbreviated as PFCL-Click) injectable system showed enhanced biocompatibility and low heat generation during cross-linking. After reaction, the cross-linked PFCL-Click scaffolds supported excellent proliferation and differentiation of preosteoblast cells on the surface. The PFCL-Click system can be successfully injected into vertebral bodies of rabbit spine and can be monitored by X-ray imaging after incorporating zirconium dioxide (ZrO2) powder. With these unique advantages, this injectable system has promising potential for bone defect repair and other tissue engineering and regenerative medicine applications.
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Affiliation(s)
- Xifeng Liu
- Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, MN 55905, USA
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, MN 55905, USA
| | - A. Lee Miller
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, MN 55905, USA
| | - Hao Xu
- Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, MN 55905, USA
| | - Brian E. Waletzki
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, MN 55905, USA
| | - Lichun Lu
- Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, MN 55905, USA
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, MN 55905, USA
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13
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Park JB, Park H, Son J, Ha SJ, Cho HS. Structural Study of Monomethyl Fumarate-Bound Human GAPDH. Mol Cells 2019; 42:597-603. [PMID: 31387164 PMCID: PMC6715340 DOI: 10.14348/molcells.2019.0114] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2019] [Revised: 07/19/2019] [Accepted: 07/19/2019] [Indexed: 01/05/2023] Open
Abstract
Glyceraldehyde-3-phosphate dehydrogenase (GAPDH) is a core enzyme of the aerobic glycolytic pathway with versatile functions and is associated with cancer development. Recently, Kornberg et al . published the detailed correlation between GAPDH and di- or monomethyl fumarate (DMF or MMF), which are well-known GAPDH antagonists in the immune system. As an extension, herein, we report the crystal structure of MMF-bound human GAPDH at 2.29 Å. The MMF molecule is covalently linked to the catalytic Cys152 of human GAPDH, and inhibits the catalytic activity of the residue and dramatically reduces the enzymatic activity of GAPDH. Structural comparisons between NAD+bound GAPDH and MMF-bound GAPDH revealed that the covalently linked MMF can block the binding of the NAD+ cosubstrate due to steric hindrance of the nicotinamide portion of the NAD+ molecule, illuminating the specific mechanism by which MMF inhibits GAPDH. Our data provide insights into GAPDH antagonist development for GAPDH-mediated disease treatment.
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Affiliation(s)
- Jun Bae Park
- Department of Systems Biology, College of Life Science and Biotechnology, Yonsei University, Seoul 03722,
Korea
| | - Hayeong Park
- Department of Systems Biology, College of Life Science and Biotechnology, Yonsei University, Seoul 03722,
Korea
| | - Jimin Son
- Department of Biochemistry, College of Life Science and Biotechnology, Yonsei University, Seoul 03722,
Korea
| | - Sang-Jun Ha
- Department of Biochemistry, College of Life Science and Biotechnology, Yonsei University, Seoul 03722,
Korea
| | - Hyun-Soo Cho
- Department of Systems Biology, College of Life Science and Biotechnology, Yonsei University, Seoul 03722,
Korea
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14
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Elemam NM, Al-Jaderi Z, Hachim MY, Maghazachi AA. HCT-116 colorectal cancer cells secrete chemokines which induce chemoattraction and intracellular calcium mobilization in NK92 cells. Cancer Immunol Immunother 2019; 68:883-895. [PMID: 30847498 PMCID: PMC11028293 DOI: 10.1007/s00262-019-02319-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2018] [Accepted: 02/28/2019] [Indexed: 10/27/2022]
Abstract
We recently reported that pretreatment of IL-2 activated human natural killer (NK) cells with the drugs dimethyl fumarate (DMF) and monomethyl fumarate (MMF) upregulated the expression of surface chemokine receptor CCR10. Ligands for CCR10, namely CCL27 and CCL28, induced the chemotaxis of these cells. Here, we performed a bioinformatics analysis to see which chemokines might be expressed by the human HCT-116 colorectal cancer cells. We observed that, in addition to CCL27 and CCL28, HCT-116 colorectal cancer cells profoundly express CXCL16 which binds CXCR6. Consequently, NK92 cells were treated with DMF and MMF for 24 h to investigate in vitro chemotaxis towards CXCL16, CCL27, and CCL28. Furthermore, supernatants collected from HCT-116 cells after 24 or 48 h incubation induced the chemotaxis of NK92 cells. Similar to their effects on human IL-2-activated NK cells, MMF and DMF enhanced the expression of CCR10 and CXCR6 in NK92 cells. Neutralizing anti-CXCL16 or anti-CCL28 inhibited the chemotactic effects of 24 and 48 supernatants, whereas anti-CCL27 only inhibited the 48 h supernatant activity, suggesting that 24 h supernatant contains CXCL16 and CCL28, whereas HCT-116 secretes all three chemokines after 48 h in vitro cultures. CXCL16, CCL27, and CCL28, as well as the supernatants collected from HCT-116, induced the mobilization of (Ca)2+ in NK92 cells. Cross-desensitization experiments confirmed the results of the chemotaxis experiments. Finally, incubation of NK92 cells with HCT-116 induced the lysis of the tumor cells. In summary, these results might have important implications in directing the anti-tumor effectors NK cells towards tumor growth sites.
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Affiliation(s)
- Noha Mousaad Elemam
- Department of Clinical Sciences, College of Medicine and The Immuno-Oncology Group, Sharjah Institute for Medical Research (SIMR), University of Sharjah, PO Box 27272, Sharjah, United Arab Emirates
| | - Zaidoon Al-Jaderi
- Department of Clinical Sciences, College of Medicine and The Immuno-Oncology Group, Sharjah Institute for Medical Research (SIMR), University of Sharjah, PO Box 27272, Sharjah, United Arab Emirates
| | - Mahmood Yaseen Hachim
- Department of Clinical Sciences, College of Medicine and The Immuno-Oncology Group, Sharjah Institute for Medical Research (SIMR), University of Sharjah, PO Box 27272, Sharjah, United Arab Emirates
| | - Azzam A Maghazachi
- Department of Clinical Sciences, College of Medicine and The Immuno-Oncology Group, Sharjah Institute for Medical Research (SIMR), University of Sharjah, PO Box 27272, Sharjah, United Arab Emirates.
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15
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Chen JW, Lim K, Bandini SB, Harris GM, Spechler JA, Arnold CB, Fardel R, Schwarzbauer JE, Schwartz J. Controlling the Surface Chemistry of a Hydrogel for Spatially Defined Cell Adhesion. ACS Appl Mater Interfaces 2019; 11:15411-15416. [PMID: 30924633 DOI: 10.1021/acsami.9b04023] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
A two-step synthesis is described for activating the surface of a fully hydrated hydrogel that is of interest as a possible scaffold for neural regeneration devices. The first step exploits the water content of the hydrogel and the hydrophobicity of the reaction solvent to create a thin oxide layer on the hydrogel surface using a common titanium or zirconium alkoxide. This layer serves as a reactive interface that enables rapid transformation of the hydrophilic, cell-nonadhesive hydrogel into either a highly hydrophobic surface by reaction with an alkylphosphonic acid, or into a cell-adhesive one using a (α,ω-diphosphono)alkane. Physically imprinting a mask ("debossing") into the hydrogel, followed by a two-step surface modification with a phosphonate, allows for patterning its surface to create spatially defined, cell-adhesive regions.
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16
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Li J, Liu X, Park S, Miller AL, Terzic A, Lu L. Strontium-substituted hydroxyapatite stimulates osteogenesis on poly(propylene fumarate) nanocomposite scaffolds. J Biomed Mater Res A 2019; 107:631-642. [PMID: 30422387 PMCID: PMC7224963 DOI: 10.1002/jbm.a.36579] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [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: 08/29/2018] [Revised: 10/09/2018] [Accepted: 11/05/2018] [Indexed: 12/11/2022]
Abstract
Incorporation of hydroxyapatite (HA) into polymer networks is a promising strategy to enhance the mechanical properties and osteoinductivity of the composite scaffolds for bone tissue engineering. In this study, we designed a group of nanocomposite scaffolds based on cross-linkable poly(propylene fumarate) (PPF) and 30 wt % strontium-hydroxyapatite (Sr-HA) nanoparticles. Four different Sr contents [Sr:(Sr + Ca), molar ratio] in the Sr-HA particles were studied: 0% (HA), 5% (Sr5-HA), 10% (Sr10-HA), and 20% (Sr20-HA). Two-dimensional (2D) disks were prepared using a thermal crosslinking method. The structure and surface morphology of different Sr-HA and PPF/Sr-HA composites were characterized using scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), transmission electron microscopy (TEM), and atomic force microscopy (AFM). To detect cellular responses in vitro, MC3T3-E1 cells were seeded and cultured on the different PPF/Sr-HA composite disks. Cell morphology after 24 h and 5 days were imaged using Live/Dead live cell staining and SEM, respectively. Cell proliferation was quantified using an MTS assay at 1, 4, and 7 days. Osteogenic differentiation of the cells was examined by alkaline phosphatase (ALP) staining at 10 days and quantified using ALP activity and osteocalcin assays at 7, 14, and 21 days. The sizes of the HA, Sr5-HA, Sr10-HA, and Sr20-HA particles were mainly between 10 × 20 nm and 10 × 250 nm, and these nanoparticles were dispersed or clustered in the composite scaffolds. in vitro cell studies showed that the PPF/Sr10-HA scaffold was significantly better than the other three groups (PPF/HA, PPF/Sr5-HA, and PPF/Sr20-HA) in supporting MC3T3-E1 cell adhesion, proliferation, and differentiation. PPF/Sr10-HA may, therefore, serve as a promising scaffold material for bone tissue engineering. © 2018 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 107A: 631-642, 2019.
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Affiliation(s)
- Jingfeng Li
- Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, Minnesota 55905, USA
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, Minnesota 55905, USA
- Department of Orthopedics, Zhongnan Hospital of Wuhan University, Wuhan, Hubei 430071, China
| | - Xifeng Liu
- Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, Minnesota 55905, USA
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, Minnesota 55905, USA
| | - Sungjo Park
- Department of Cardiovascular Diseases and Center for Regenerative Medicine, Mayo Clinic, Rochester, Minnesota 55905, USA
| | - A. Lee Miller
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, Minnesota 55905, USA
| | - Andre Terzic
- Department of Cardiovascular Diseases and Center for Regenerative Medicine, Mayo Clinic, Rochester, Minnesota 55905, USA
| | - Lichun Lu
- Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, Minnesota 55905, USA
- Department of Orthopedic Surgery, Mayo Clinic, Rochester, Minnesota 55905, USA
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17
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Teng Y, Giambini H, Rezaei A, Liu X, Lee Miller A, Waletzki BE, Lu L. Poly(Propylene Fumarate)-Hydroxyapatite Nanocomposite Can Be a Suitable Candidate for Cervical Cages. J Biomech Eng 2018; 140:2683663. [PMID: 30029248 PMCID: PMC6056183 DOI: 10.1115/1.4040458] [Citation(s) in RCA: 9] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2018] [Revised: 05/29/2018] [Indexed: 11/08/2022]
Abstract
A wide range of materials have been used for the development of intervertebral cages. Poly(propylene fumarate) (PPF) has been shown to be an excellent biomaterial with characteristics similar to trabecular bone. Hydroxyapatite (HA) has been shown to enhance biocompatibility and mechanical properties of PPF. The purpose of this study was to characterize the effect of PPF augmented with HA (PPF:HA) and evaluate the feasibility of this material for the development of cervical cages. PPF was synthesized and combined with HA at PPF:HA wt:wt ratios of 100:0, 80:20, 70:30, and 60:40. Molds were fabricated for testing PPF:HA bulk materials in compression, bending, tension, and hardness according to ASTM standards, and also for cage preparation. The cages were fabricated with and without holes and with porosity created by salt leaching. The samples as well as the cages were mechanically tested using a materials testing frame. All elastic moduli as well as the hardness increased significantly by adding HA to PPF (p < 0.0001). The 20 wt % HA increased the moduli significantly compared to pure PPF (p < 0.0001). Compressive stiffness of all cages also increased with the addition of HA. HA increased the failure load of the porous cages significantly (p = 0.0018) compared with nonporous cages. PPF:HA wt:wt ratio of 80:20 proved to be significantly stiffer and stronger than pure PPF. The current results suggest that this polymeric composite can be a suitable candidate material for intervertebral body cages.
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Affiliation(s)
- Yong Teng
- Department of Physiology and
Biomedical Engineering,
Mayo Clinic College of Medicine,
Rochester, MN 55905
- Department of Orthopedic Surgery,Mayo Clinic College of Medicine,
Rochester, MN 55905
- Orthopedic Center,General Hospital of Xinjiang
Military Region PLA,
Uygur Autonomous Region,
Xinjiang 830000, China
e-mail:
| | - Hugo Giambini
- Department of Orthopedic Surgery,
Mayo Clinic College of Medicine,
Rochester, MN 55905
e-mail:
| | - Asghar Rezaei
- Department of Physiology and
Biomedical Engineering,
Mayo Clinic College of Medicine,
Rochester, MN 55905
e-mail:
| | - Xifeng Liu
- Department of Physiology andBiomedical Engineering,
Mayo Clinic College of Medicine,
Rochester, MN 55905
- Department of Orthopedic Surgery,Mayo Clinic College of Medicine,
Rochester, MN 55905
e-mail:
| | - A. Lee Miller
- Department of Orthopedic Surgery,
Mayo Clinic College of Medicine,
Rochester, MN 55905
e-mail:
| | - Brian E. Waletzki
- Department of Orthopedic Surgery,
Mayo Clinic College of Medicine,
Rochester, MN 55905
e-mail:
| | - Lichun Lu
- Department of Physiology andBiomedical Engineering,
Mayo Clinic College of Medicine,
Rochester, MN 55905
- Department of Orthopedic Surgery,Mayo Clinic College of Medicine,
Rochester, MN 55905
e-mail:
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18
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Abánades Lázaro I, Haddad S, Rodrigo-Muñoz JM, Marshall RJ, Sastre B, Del Pozo V, Fairen-Jimenez D, Forgan RS. Surface-Functionalization of Zr-Fumarate MOF for Selective Cytotoxicity and Immune System Compatibility in Nanoscale Drug Delivery. ACS Appl Mater Interfaces 2018; 10:31146-31157. [PMID: 30136840 DOI: 10.1021/acsami.8b11652] [Citation(s) in RCA: 79] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Metal-organic frameworks (MOFs), network structures wherein metal ions or clusters link organic ligands into porous materials, are being actively researched as nanoscale drug delivery devices as they offer tunable structures with high cargo loading that can easily be further functionalized for targeting and enhanced physiological stability. The excellent biocompatibility of Zr has meant that its MOFs are among the most studied to date, in particular the archetypal Zr terephthalate UiO-66. In contrast, the isoreticular analog linked by fumarate (Zr-fum) has received little attention, despite the endogenous linker being part of the Krebs cycle. Herein, we report a comprehensive study of Zr-fum in the context of drug delivery. Reducing particle size is shown to increase uptake by cancer cells while reducing internalization by macrophages, immune system cells that remove foreign objects from the bloodstream. Zr-fum is compatible with defect loading of the drug dichloroacetate (DCA) as well as surface modification during synthesis, through coordination modulation and postsynthetically. DCA-loaded, PEGylated Zr-fum shows selective in vitro cytotoxicity toward HeLa and MCF-7 cancer cells, likely as a consequence of its enhanced caveolae-mediated endocytosis compared to uncoated precursors, and it is well tolerated by HEK293 kidney cells, J774 macrophages, and human peripheral blood lymphocytes. Compared to UiO-66, Zr-fum is more efficient at transporting the drug mimic calcein into HeLa cells, and DCA-loaded, PEGylated Zr-fum is more effective at reducing HeLa and MCF-7 cell proliferation than the analogous UiO-66 sample. In vitro examination of immune system response shows that Zr-fum samples induce less reactive oxygen species than UiO-66 analogs, possibly as a consequence of the linker being endogenous, and do not activate the C3 and C4 complement cascade pathways, suggesting that Zr-fum can avoid phagocytic activation. The results show that Zr-fum is an attractive alternative to UiO-66 for nanoscale drug delivery, and that a wide range of in vitro experiments is available to greatly inform the design of drug delivery systems prior to early stage animal studies.
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Affiliation(s)
- Isabel Abánades Lázaro
- WestCHEM School of Chemistry , University of Glasgow , Joseph Black Building, University Avenue , Glasgow G12 8QQ , U.K
| | - Salame Haddad
- Adsorption & Advanced Materials Laboratory, Department of Chemical Engineering & Biotechnology , University of Cambridge , Philippa Fawcett Drive , Cambridge CB3 0AS , U.K
| | - Jose M Rodrigo-Muñoz
- Department of Immunology, Instituto de Investigación Sanitaria Fundación Jiménez Díaz , Universidad Autónoma de Madrid (IIS-FJD, UAM), and CIBER de Enfermedades Respiratorias (CIBERES) , 28029 Madrid , Spain
| | - Ross J Marshall
- WestCHEM School of Chemistry , University of Glasgow , Joseph Black Building, University Avenue , Glasgow G12 8QQ , U.K
| | - Beatriz Sastre
- Department of Immunology, Instituto de Investigación Sanitaria Fundación Jiménez Díaz , Universidad Autónoma de Madrid (IIS-FJD, UAM), and CIBER de Enfermedades Respiratorias (CIBERES) , 28029 Madrid , Spain
| | - Victoria Del Pozo
- Department of Immunology, Instituto de Investigación Sanitaria Fundación Jiménez Díaz , Universidad Autónoma de Madrid (IIS-FJD, UAM), and CIBER de Enfermedades Respiratorias (CIBERES) , 28029 Madrid , Spain
| | - David Fairen-Jimenez
- Adsorption & Advanced Materials Laboratory, Department of Chemical Engineering & Biotechnology , University of Cambridge , Philippa Fawcett Drive , Cambridge CB3 0AS , U.K
| | - Ross S Forgan
- WestCHEM School of Chemistry , University of Glasgow , Joseph Black Building, University Avenue , Glasgow G12 8QQ , U.K
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19
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Shishmarev D, Wright AJ, Rodrigues TB, Pileio G, Stevanato G, Brindle KM, Kuchel PW. Sub-minute kinetics of human red cell fumarase: 1 H spin-echo NMR spectroscopy and 13 C rapid-dissolution dynamic nuclear polarization. NMR Biomed 2018; 31. [PMID: 29315908 DOI: 10.1002/nbm.3870] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2017] [Revised: 10/13/2017] [Accepted: 10/30/2017] [Indexed: 06/07/2023]
Abstract
Fumarate is an important probe of metabolism in hyperpolarized magnetic resonance imaging and spectroscopy. It is used to detect the release of fumarase in cancer tissues, which is associated with necrosis and drug treatment. Nevertheless, there are limited reports describing the detailed kinetic studies of this enzyme in various cells and tissues. Thus, we aimed to evaluate the sub-minute kinetics of human red blood cell fumarase using nuclear magnetic resonance (NMR) spectroscopy, and to provide a quantitative description of the enzyme that is relevant to the use of fumarate as a probe of cell rupture. The fumarase reaction was studied using time courses of 1 H spin-echo and 13 C-NMR spectra. 1 H-NMR experiments showed that the fumarase reaction in hemolysates is sufficiently rapid to make its kinetics amenable to study in a period of approximately 3 min, a timescale characteristic of hyperpolarized 13 C-NMR spectroscopy. The rapid-dissolution dynamic nuclear polarization (RD-DNP) technique was used to hyperpolarize [1,4-13 C]fumarate, which was injected into concentrated hemolysates. The kinetic data were analyzed using recently developed FmRα analysis and modeling of the enzymatic reaction using Michaelis-Menten equations. In RD-DNP experiments, the decline in the 13 C-NMR signal from fumarate, and the concurrent rise and fall of that from malate, were captured with high spectral resolution and signal-to-noise ratio, which allowed the robust quantification of fumarase kinetics. The kinetic parameters obtained indicate the potential contribution of hemolysis to the overall rate of the fumarase reaction when 13 C-NMR RD-DNP is used to detect necrosis in animal models of implanted tumors. The analytical procedures developed will be applicable to studies of other rapid enzymatic reactions using conventional and hyperpolarized substrate NMR spectroscopy.
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Affiliation(s)
- Dmitry Shishmarev
- School of Life and Environmental Sciences, The University of Sydney, Sydney, NSW, Australia
- The John Curtin School of Medical Research, The Australian National University, Canberra, ACT, Australia
| | - Alan J Wright
- Cancer Research UK Cambridge Institute, Li Ka Shing Centre, University of Cambridge, Cambridge, UK
| | - Tiago B Rodrigues
- Cancer Research UK Cambridge Institute, Li Ka Shing Centre, University of Cambridge, Cambridge, UK
| | - Giuseppe Pileio
- School of Chemistry, University of Southampton, Southampton, UK
| | | | - Kevin M Brindle
- Cancer Research UK Cambridge Institute, Li Ka Shing Centre, University of Cambridge, Cambridge, UK
| | - Philip W Kuchel
- School of Life and Environmental Sciences, The University of Sydney, Sydney, NSW, Australia
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20
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Sallam S, Luo Y, Becker ML, Wesdemiotis C. Multidimensional mass spectrometry characterization of isomeric biodegradable polyesters. Eur J Mass Spectrom (Chichester) 2017; 23:402-410. [PMID: 29183194 DOI: 10.1177/1469066717711401] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The biodegradable polyester copolymer poly(propylene fumarate) (PPF) is increasingly utilized in bone tissue engineering studies due to its suitability as inert cross-linkable scaffold material. The well-defined poly(propylene fumarate) oligomers needed for this purpose are synthesized by post-polymerization isomerization of poly(propylene maleate), which is prepared by ring opening polymerization of maleic anhydride and propylene oxide. In this study, multidimensional mass spectrometry methodologies, interfacing matrix-assisted laser desorption ionization and electrospray ionization with mass analysis, tandem mass spectrometry fragmentation and/or ion mobility mass spectrometry, have been employed to characterize the composition, end groups, chain connectivity and isomeric purity of the isomeric copolyesters poly(propylene maleate)and poly(propylene fumarate). It is demonstrated that the polymerization catalyst is incorporated into the polymer chain (as the initiating chain end) and that the poly(propylene maleate) to poly(propylene fumarate) isomerization using an amine base proceeds with quantitative yield. Hydrolytic degradation is shown not to alter the double bond geometry of the poly(propylene fumarate) or poly(propylene maleate) chains.
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Affiliation(s)
- Sahar Sallam
- 1 Department of Chemistry, The University of Akron, Akron, OH, USA
| | - Yuanyuan Luo
- 2 Department of Polymer Science, The University of Akron, Akron, OH, USA
| | - Matthew L Becker
- 2 Department of Polymer Science, The University of Akron, Akron, OH, USA
| | - Chrys Wesdemiotis
- 1 Department of Chemistry, The University of Akron, Akron, OH, USA
- 2 Department of Polymer Science, The University of Akron, Akron, OH, USA
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21
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S IP, Varanasi MB, Mohammed I. Bioanalysis of monomethyl fumarate in human plasma by a sensitive and rapid LC-MS/MS method and its pharmacokinetic application. J Pharm Biomed Anal 2017; 146:109-116. [PMID: 28873360 DOI: 10.1016/j.jpba.2017.08.015] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [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: 05/07/2017] [Revised: 08/08/2017] [Accepted: 08/09/2017] [Indexed: 11/18/2022]
Abstract
Dimethyl fumarate (DMF) is the methyl ester of fumaric acid, after oral administration completely converts to its active metabolite monomethyl fumarate (MMF). A simple, rapid and sensitive LC-MS/MS method was developed and validated for the quantification of MMF in human plasma. Monomethyl fumarate d3 was used as an internal standard (IS). The analyte and the IS were extracted from plasma using a selective solid phase extraction technique. The clean samples were chromatographed on a C18 column using formic acid and acetonitrile (25:75, v/v) as mobile phase. An API-4000 LC-MS/MS system equipped with turbo ion spray (TIS) source and operated in multiple reactions monitoring (MRM) mode was used for the study. The method was validated for linearity in the range of 5.03-2006.92ng/mL. Also, a number of stability tests were conducted to evaluate the stability of analyte, IS in plasma samples and in neat samples, the results comply with recent bioanalytical guidelines. A shortest run time helped us to analyze more than 300 samples in a day. The method was applied to a pharmacokinetic study in ten healthy male Indian subjects and the study data was authenticated by conducting incurred sample reanalysis (ISR).
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Affiliation(s)
- Imam Pasha S
- Sultan Ul Uloom college of Pharmacy, Banjara Hills, Hyderabad 500 034, Telangana, India.
| | | | - Ibrahim Mohammed
- Pratap Narendar Reddy College of Pharmacy, Shamshabad, Hyderabad 509 325, Telangana, India
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22
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Cai Q, Xue J, Wang Q, Du Y. Solid-state cocrystal formation between acyclovir and fumaric acid: Terahertz and Raman vibrational spectroscopic studies. Spectrochim Acta A Mol Biomol Spectrosc 2017; 186:29-36. [PMID: 28605686 DOI: 10.1016/j.saa.2017.06.011] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [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: 03/09/2017] [Revised: 05/16/2017] [Accepted: 06/05/2017] [Indexed: 06/07/2023]
Abstract
The vibrational spectra of solid-state acyclovir, fumaric acid and their cocrystal have been investigated by using terahertz time-domain spectroscopy (THz-TDS) and Raman spectroscopy at room temperature. In experimental THz spectra, the cocrystal has absorption peaks in 0.65, 0.94 and 1.10THz respectively, while the raw materials are absolutely different in this region. Raman spectra also show similar results about differences between the cocrystal and raw materials. Density functional theory (DFT) was performed to simulate vibrational modes of different theoretical forms between acyclovir and fumaric acid. The calculation of theoretical THz spectra shows that O8C7N1H27 and the carboxyl group COOH establish a dimer theoretical cocrystal form by the hydrogen bonding effect, which makes contributions to the formation of absorption peaks in 0.70, 1.01 and 1.34THz, and agrees well with experimental observations. The theoretical Raman result also indicates that this dimer form matches with experimental results. The characteristic bands of the cocrystal between acyclovir and fumaric acid are also assigned based on the simulation results from the DFT calculation.
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Affiliation(s)
- Qiang Cai
- Centre for THz Research, China Jiliang University, Hangzhou 310018, China
| | - Jiadan Xue
- Department of Chemisty, Zhejiang Sci-Tech University, Hangzhou 310018, China
| | - Qiqi Wang
- Centre for THz Research, China Jiliang University, Hangzhou 310018, China
| | - Yong Du
- Centre for THz Research, China Jiliang University, Hangzhou 310018, China.
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23
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Trachtenberg JE, Placone JK, Smith BT, Fisher JP, Mikos AG. Extrusion-based 3D printing of poly(propylene fumarate) scaffolds with hydroxyapatite gradients. J Biomater Sci Polym Ed 2017; 28:532-554. [PMID: 28125380 PMCID: PMC5597446 DOI: 10.1080/09205063.2017.1286184] [Citation(s) in RCA: 68] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2016] [Accepted: 01/20/2017] [Indexed: 12/30/2022]
Abstract
The primary focus of this work is to present the current challenges of printing scaffolds with concentration gradients of nanoparticles with an aim to improve the processing of these scaffolds. Furthermore, we address how print fidelity is related to material composition and emphasize the importance of considering this relationship when developing complex scaffolds for bone implants. The ability to create complex tissues is becoming increasingly relevant in the tissue engineering community. For bone tissue engineering applications, this work demonstrates the ability to use extrusion-based printing techniques to control the spatial deposition of hydroxyapatite (HA) nanoparticles in a 3D composite scaffold. In doing so, we combined the benefits of synthetic, degradable polymers, such as poly(propylene fumarate) (PPF), with osteoconductive HA nanoparticles that provide robust compressive mechanical properties. Furthermore, the final 3D printed scaffolds consisted of well-defined layers with interconnected pores, two critical features for a successful bone implant. To demonstrate a controlled gradient of HA, thermogravimetric analysis was carried out to quantify HA on a per-layer basis. Moreover, we non-destructively evaluated the tendency of HA particles to aggregate within PPF using micro-computed tomography (μCT). This work provides insight for proper fabrication and characterization of composite scaffolds containing particle gradients and has broad applicability for future efforts in fabricating complex scaffolds for tissue engineering applications.
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Key Words
- (Tukey’s) Honestly Significant Difference test, HSD
- Analysis of variance, ANOVA
- Atomic force microscopy, AFM
- Diethyl fumarate, DEF
- Dimethyl sulfoxide, DMSO
- Extracellular matrix, ECM
- Fourier transform-infrared spectroscopy, FT-IR
- Hydroxyapatite, HA
- Micro-computed tomography, μCT.
- Phenylbis(246-trimethylbenzoyl)-phosphine oxide, BAPO
- Poly(propylene fumarate), PPF
- Poly(propylene fumarate)-co-poly(ε-caprolactone), PPF-co-PCL
- Polydispersity index, PDI
- Scanning electron microscopy, SEM
- Sodium dodecyl sulfate, SDS
- Stereolithography, STL
- Thermogravimetric analysis, TGA
- Viscosity
- bone tissue engineering
- composites
- compressive modulus
- gradient
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Affiliation(s)
| | - Jesse K. Placone
- Fischell Department of Bioengineering, University of Maryland, College Park, MD, USA
| | | | - John P. Fisher
- Fischell Department of Bioengineering, University of Maryland, College Park, MD, USA
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24
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Marszalek D, Goldnik A, Winiecka I, Jaworsk P. NEW RENIN INHIBITORS - STABILITY AND ACTIVITY DETERMINATION. PART IV. Acta Pol Pharm 2017; 74:393-399. [PMID: 29624244] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
A series of new seven potential renin inhibitors containing pseudodipeptides were synthesized. Stability for all compounds (1-7) in homogenates of liver, kidney, lung and in serum, gastric, intestinal juice and in the presence of α-chymotrypsin was determined. Compound 1 was unstable in all determined mediums. Compounds 2, 4, 5 and 7 were unstable, compound 3 was stable, compound 6 was unstable only in α-chy-motrypsin solution. Inhibitory activity of the compounds was measured in vitro by HPLC determination of low-ering concentration of substrate (angiotensinogen) in the presence of renin and the potential renin inhibitor (compounds 1-7). Compounds 1, 2, 4, 5, 6 and 7 showed inhibitory activity (1.12 x 10⁻⁷, 0.96 x 10⁻⁶, 1.58 x10⁻⁷,1.68 x 10⁻⁶, 1.30 x 10⁻⁶, 0.96 x 10⁻⁷M, respectively).
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25
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Farshid B, Lalwani G, Mohammadi MS, Simonsen J, Sitharaman B. Boron nitride nanotubes and nanoplatelets as reinforcing agents of polymeric matrices for bone tissue engineering. J Biomed Mater Res B Appl Biomater 2017; 105:406-419. [PMID: 26526153 PMCID: PMC4854812 DOI: 10.1002/jbm.b.33565] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [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: 05/23/2015] [Revised: 09/17/2015] [Accepted: 10/14/2015] [Indexed: 11/07/2022]
Abstract
This study investigates the mechanical properties and in vitro cytotoxicity of one- and two-dimensional boron nitride nanomaterials-reinforced biodegradable polymeric nanocomposites. Poly(propylene fumarate) (PPF) nanocomposites were fabricated using crosslinking agent N-vinyl pyrrolidone and inorganic nanomaterials: boron nitride nanotubes (BNNTs) and boron nitride nanoplatelets (BNNPs) dispersed at 0.2 wt % in the polymeric matrix. The incorporation of BNNPs and BNNTs resulted in a ∼38 and ∼15% increase in compressive (Young's) modulus, and ∼31 and ∼6% increase in compressive yield strength compared to PPF control, respectively. The nanocomposites showed a time-dependent increased protein adsorption for collagen I protein. The cytotoxicity evaluation of aqueous BNNT and BNNP dispersions (at 1-100 μg/mL concentrations) using murine MC3T3 preosteoblast cells showed ∼73-99% viability. The cytotoxicity evaluation of media extracts of nanocomposites before crosslinking, after crosslinking, and upon degradation (using 1×-100× dilutions) showed dose-dependent cytotoxicity responses. Crosslinked nanocomposites showed excellent (∼79-100%) cell viability, cellular attachment (∼57-67%), and spreading similar to cells grown on the surface of tissue culture polystyrene control. The media extracts of degradation products showed a dose-dependent cytotoxicity. The favorable cytocompatibility results in combination with improved mechanical properties of BNNT and BNNP nanocomposites opens new avenues for further in vitro and in vivo safety and efficacy studies towards bone tissue engineering applications. © 2015 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 105B: 406-419, 2017.
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Affiliation(s)
- Behzad Farshid
- Department of Biomedical Engineering, Stony Brook University, Stony Brook, New York 11794, USA
- Department of Materials Science and Engineering, Stony Brook University, Stony Brook, New York 11794, USA
| | - Gaurav Lalwani
- Department of Biomedical Engineering, Stony Brook University, Stony Brook, New York 11794, USA
| | - Meisam Shir Mohammadi
- Department of Wood Science and Engineering, Oregon State University, Corvallis, Oregon 97331, USA
| | - John Simonsen
- Department of Wood Science and Engineering, Oregon State University, Corvallis, Oregon 97331, USA
| | - Balaji Sitharaman
- Department of Biomedical Engineering, Stony Brook University, Stony Brook, New York 11794, USA
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26
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Abstract
While antioxidants are on everyone's lips, antireductants are their much less-known counterparts. Following an antioxidant's definition, an antireductant prevents the chemical reduction of another compound by undergoing reduction itself. Antireductants have been traced back as far as the origin of life, which they facilitated by removal of atmospheric dihydrogen, H2 Moreover, as electron acceptors, antireductants equipped the first metabolic pathways, enabling lithoautotrophic microbial growth. When the Earth's atmosphere became more oxidizing, certain antireductants revealed their Janus-face by acting as antioxidants. Both capacities, united in one compound, were detected in primary as well as plant secondary metabolites. Substantiated by product identification, such antireductants comprise antiradicals (e.g. carotenoids) up to diminishers of ruminal methane emission (e.g. fumarate, catechin or resveratrol). Beyond these Janus-faced, multifunctional compounds, the spectrum of antireductants extends to pure electron-attractors (e.g. atmospheric triplet oxygen, O2, for plant root and gut protection). Current and prospective fields of antireductant application range from health promotion over industrial production to environmental sustainability.
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Affiliation(s)
- Petra Maria Becker
- IEZ-Institute for Ethnobotany and Zoopharmacognosy, Rijksstraatweg 158, 6573 DG Beek-Ubbergen, The Netherlands
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27
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Díez-Pascual AM, Díez-Vicente AL. Poly(propylene fumarate)/Polyethylene Glycol-Modified Graphene Oxide Nanocomposites for Tissue Engineering. ACS Appl Mater Interfaces 2016; 8:17902-14. [PMID: 27383639 DOI: 10.1021/acsami.6b05635] [Citation(s) in RCA: 113] [Impact Index Per Article: 14.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
Poly(propylene fumarate) (PPF)-based nanocomposites incorporating different amounts of polyethylene glycol-functionalized graphene oxide (PEG-GO) have been prepared via sonication and thermal curing, and their surface morphology, structure, thermal stability, hydrophilicity, water absorption, biodegradation, cytotoxicity, mechanical, viscoelastic and antibacterial properties have been investigated. SEM and TEM images corroborated that the noncovalent functionalization with PEG caused the exfoliation of GO into thinner flakes. IR spectra suggested the presence of strong hydrogen-bonding interactions between the nanocomposite components. A gradual rise in the level of hydrophilicity, water uptake, biodegradation rate, surface roughness, protein absorption capability and thermal stability was found upon increasing GO concentration in the composites. Tensile tests revealed improved stiffness, strength and toughness for the composites compared to unfilled PPF, ascribed to a homogeneous GO dispersion within the matrix along with a strong PPF/PEG-GO interfacial adhesion via polar and hydrogen bonding interactions. Further, the nanocomposites retained enough stiffness and strength under a biological state to provide effective support for bone tissue formation. The antibacterial activity was investigated against Gram-positive Staphylococcus aureus and Staphylococcus epidermidis as well as Gram-negative Pseudomonas aeruginosa and Escherichia coli microorganisms, and it rose sharply upon increasing GO concentration; systematically, the biocide effect was stronger versus Gram-positive bacteria. Cell viability data demonstrated that PPF/PEG-GO composites do not induce toxicity over human dermal fibroblasts. These novel materials show great potential to be applied in the bone tissue engineering field.
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Affiliation(s)
- Ana M Díez-Pascual
- Analytical Chemistry, Physical Chemistry and Chemical Engineering Department, Faculty of Biology, Environmental Sciences and Chemistry, Alcalá University , E-28871 Alcalá de Henares, Madrid, Spain
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28
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Rubio-Martinez M, Hadley TD, Batten MP, Constanti-Carey K, Barton T, Marley D, Mönch A, Lim KS, Hill MR. Scalability of Continuous Flow Production of Metal-Organic Frameworks. ChemSusChem 2016; 9:938-941. [PMID: 27075923 DOI: 10.1002/cssc.201501684] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [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: 12/23/2015] [Revised: 02/22/2016] [Indexed: 06/05/2023]
Abstract
Achieving the large-scale production of metal-organic frameworks (MOFs) is crucial for their utilization in applied settings. For many MOFs, quality suffers from large-scale, batch reaction systems. We have developed continuous processes for their production which showed promise owing to their versatility and the high quality of the products. Here, we report the successful upscaling of this concept by more than two orders of magnitude to deliver unprecedented production rates and space-time-yields (STYs) while maintaining the product quality. Encouragingly, no change in the reaction parameters, obtained at small scale, was required. The production of aluminium fumarate was achieved at an STY of 97 159 kg m(-3) day(-1) and a rate of 5.6 kg h(-1) .
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Affiliation(s)
| | | | | | | | - Tim Barton
- CSIRO, Private Bag 10, Clayton, South VIC, 3169, Australia
| | - Dylan Marley
- CSIRO, Private Bag 10, Clayton, South VIC, 3169, Australia
| | - Andreas Mönch
- CSIRO, Private Bag 10, Clayton, South VIC, 3169, Australia
| | - Kok-Seng Lim
- CSIRO, Private Bag 10, Clayton, South VIC, 3169, Australia
| | - Matthew R Hill
- CSIRO, Private Bag 10, Clayton, South VIC, 3169, Australia.
- Department of Chemical Engineering, Monash University, Clayton, VIC, 3800, Australia.
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29
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Karmakar S, Dechnik J, Janiak C, De S. Aluminium fumarate metal-organic framework: A super adsorbent for fluoride from water. J Hazard Mater 2016; 303:10-20. [PMID: 26513559 DOI: 10.1016/j.jhazmat.2015.10.030] [Citation(s) in RCA: 86] [Impact Index Per Article: 10.8] [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: 07/16/2015] [Revised: 10/01/2015] [Accepted: 10/13/2015] [Indexed: 06/05/2023]
Abstract
Potential of aluminium fumarate metal organic framework (MOF) for fluoride removal from groundwater has been explored in this work. The laboratory produced MOF exhibited characteristics similar to the commercial version. MOF was found to be micro-porous with surface area of 1156 m(2)/g and average pore size 17Å. Scanning electron micrograph of the AlFu MOF showed minute pores and texture was completely different from either of the parent materials. Change in the composition of AlFu MOF after fluoride adsorption was evident from powder X-ray diffraction analysis. Thermal stability of the AlFu MOF up to 700K was established by thermo-gravimetric analysis. Incorporation of fluoride phase after adsorption was confirmed by X-ray fluorescence analysis. As observed from FTIR study, hydroxyl ions in AlFu MOF were substituted by fluoride. 0.75 g/l AlFu MOF was good enough for complete removal of 30 mg/l fluoride concentration in feed solution. The maximum adsorption capacity for fluoride was 600, 550, 504 and 431 mg/g, respectively, at 293, 303, 313 and 333K.
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Affiliation(s)
- Sankha Karmakar
- Department of Chemical Engineering, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
| | - Janina Dechnik
- Institut fur Anorganische Chemie und Strukturchemie, Heinrich-Heine-Universität Düsseldorf, 40204 Düsseldorf, Germany
| | - Christoph Janiak
- Institut fur Anorganische Chemie und Strukturchemie, Heinrich-Heine-Universität Düsseldorf, 40204 Düsseldorf, Germany.
| | - Sirshendu De
- Department of Chemical Engineering, Indian Institute of Technology Kharagpur, Kharagpur 721302, India.
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30
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Du Y, Fang HX, Zhang Q, Zhang HL, Hong Z. Spectroscopic investigation on cocrystal formation between adenine and fumaric acid based on infrared and Raman techniques. Spectrochim Acta A Mol Biomol Spectrosc 2016; 153:580-585. [PMID: 26436846 DOI: 10.1016/j.saa.2015.09.020] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [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: 03/02/2015] [Revised: 07/24/2015] [Accepted: 09/26/2015] [Indexed: 06/05/2023]
Abstract
As an important component of double-stranded DNA, adenine has powerful hydrogen-bond capability, due to rich hydrogen bond donors and acceptors existing within its molecular structure. Therefore, it is easy to form cocrystal between adenine and other small molecules with intermolecular hydrogen-bond effect. In this work, cocrystal of adenine and fumaric acid has been characterized as model system by FT-IR and FT-Raman spectral techniques. The experimental results show that the cocrystal formed between adenine and fumaric acid possesses unique spectroscopical characteristic compared with that of starting materials. Density functional theory (DFT) calculation has been performed to optimize the molecular structures and simulate vibrational modes of adenine, fumaric acid and the corresponding cocrystal. Combining the theoretical and experimental vibrational results, the characteristic bands corresponding to bending and stretching vibrations of amino and carbonyl groups within cocrystal are shifted into lower frequencies upon cocrystal formation, and the corresponding bond lengths show some increase due to the effect of intermolecular hydrogen bonding. Different vibrational modes shown in the experimental spectra have been assigned based on the simulation DFT results. The study could provide experimental and theoretical benchmarks to characterize cocrystal formed between active ingredients and cocrystal formers and also the intermolecular hydrogen-bond effect within cocrystal formation process by vibrational spectroscopic techniques.
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Affiliation(s)
- Yong Du
- Centre for THz Research, China Jiliang University, Hangzhou 310018, China.
| | - Hong Xia Fang
- Centre for THz Research, China Jiliang University, Hangzhou 310018, China
| | - Qi Zhang
- Centre for THz Research, China Jiliang University, Hangzhou 310018, China
| | - Hui Li Zhang
- Centre for THz Research, China Jiliang University, Hangzhou 310018, China
| | - Zhi Hong
- Centre for THz Research, China Jiliang University, Hangzhou 310018, China
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31
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Hassan SA, Elzanfaly ES, Salem MY, El-Zeany BA. Mean centering of double divisor ratio spectra, a novel spectrophotometric method for analysis of ternary mixtures. Spectrochim Acta A Mol Biomol Spectrosc 2016; 153:132-142. [PMID: 26298680 DOI: 10.1016/j.saa.2015.07.109] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [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: 06/06/2015] [Revised: 07/29/2015] [Accepted: 07/30/2015] [Indexed: 06/04/2023]
Abstract
A novel spectrophotometric method was developed for determination of ternary mixtures without previous separation, showing significant advantages over conventional methods. The new method is based on mean centering of double divisor ratio spectra. The mathematical explanation of the procedure is illustrated. The method was evaluated by determination of model ternary mixture and by the determination of Amlodipine (AML), Aliskiren (ALI) and Hydrochlorothiazide (HCT) in laboratory prepared mixtures and in a commercial pharmaceutical preparation. For proper presentation of the advantages and applicability of the new method, a comparative study was established between the new mean centering of double divisor ratio spectra (MCDD) and two similar methods used for analysis of ternary mixtures, namely mean centering (MC) and double divisor of ratio spectra-derivative spectrophotometry (DDRS-DS). The method was also compared with a reported one for analysis of the pharmaceutical preparation. The method was validated according to the ICH guidelines and accuracy, precision, repeatability and robustness were found to be within the acceptable limits.
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Affiliation(s)
- Said A Hassan
- Department of Analytical Chemistry, Faculty of Pharmacy, Cairo University, Kasr El-Aini Street, 11562 Cairo, Egypt.
| | - Eman S Elzanfaly
- Department of Analytical Chemistry, Faculty of Pharmacy, Cairo University, Kasr El-Aini Street, 11562 Cairo, Egypt
| | - Maissa Y Salem
- Department of Analytical Chemistry, Faculty of Pharmacy, Cairo University, Kasr El-Aini Street, 11562 Cairo, Egypt
| | - Badr A El-Zeany
- Department of Analytical Chemistry, Faculty of Pharmacy, Cairo University, Kasr El-Aini Street, 11562 Cairo, Egypt
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32
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Gustafson CT, Boakye-Agyeman F, Brinkman CL, Reid JM, Patel R, Bajzer Z, Dadsetan M, Yaszemski MJ. Controlled Delivery of Vancomycin via Charged Hydrogels. PLoS One 2016; 11:e0146401. [PMID: 26760034 PMCID: PMC4711919 DOI: 10.1371/journal.pone.0146401] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2015] [Accepted: 12/16/2015] [Indexed: 01/08/2023] Open
Abstract
Surgical site infection (SSI) remains a significant risk for any clean orthopedic surgical procedure. Complications resulting from an SSI often require a second surgery and lengthen patient recovery time. The efficacy of antimicrobial agents delivered to combat SSI is diminished by systemic toxicity, bacterial resistance, and patient compliance to dosing schedules. We submit that development of localized, controlled release formulations for antimicrobial compounds would improve the effectiveness of prophylactic surgical wound antibiotic treatment while decreasing systemic side effects. Our research group developed and characterized oligo(poly(ethylene glycol)fumarate) / sodium methacrylate (OPF/SMA) charged copolymers as biocompatible hydrogel matrices. Here, we report the engineering of this copolymer for use as an antibiotic delivery vehicle in surgical applications. We demonstrate that these hydrogels can be efficiently loaded with vancomycin (over 500 μg drug per mg hydrogel) and this loading mechanism is both time- and charge-dependent. Vancomycin release kinetics are shown to be dependent on copolymer negative charge. In the first 6 hours, we achieved as low as 33.7% release. In the first 24 hours, under 80% of total loaded drug was released. Further, vancomycin release from this system can be extended past four days. Finally, we show that the antimicrobial activity of released vancomycin is equivalent to stock vancomycin in inhibiting the growth of colonies of a clinically derived strain of methicillin-resistant Staphylococcus aureus. In summary, our work demonstrates that OPF/SMA hydrogels are appropriate candidates to deliver local antibiotic therapy for prophylaxis of surgical site infection.
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Affiliation(s)
- Carl T. Gustafson
- Department of Molecular Pharmacology and Experimental Therapeutics, Mayo Graduate School, Mayo Clinic College of Medicine, Mayo Clinic, Rochester, Minnesota 55902, United States of America
- * E-mail:
| | - Felix Boakye-Agyeman
- Pharmacometrics Center, Duke Clinical Research Institute (DCRI), Durham, North Carolina 27705, United States of America
| | - Cassandra L. Brinkman
- Division of Clinical Microbiology, Department of Laboratory Medicine and Pathology, Mayo Clinic Infectious Disease Research Laboratory, Mayo Clinic, Rochester, Minnesota 55902, United States of America
| | - Joel M. Reid
- Department of Molecular Pharmacology and Experimental Therapeutics, Mayo Graduate School, Mayo Clinic College of Medicine, Mayo Clinic, Rochester, Minnesota 55902, United States of America
| | - Robin Patel
- Division of Clinical Microbiology, Department of Laboratory Medicine and Pathology, Mayo Clinic Infectious Disease Research Laboratory, Mayo Clinic, Rochester, Minnesota 55902, United States of America
| | - Zeljko Bajzer
- Division of Biomathematics, Department of Biochemistry and Molecular Biology, Mayo Clinic College of Medicine, Mayo Clinic, Rochester, Minnesota 55902, United States of America
- Division of Biomathematics, Department of Physiology and Biomedical Engineering, Mayo Clinic College of Medicine, Mayo Clinic, Rochester, Minnesota 55902, United States of America
| | - Mahrokh Dadsetan
- Division of Orthopaedic Research, Department of Physiology and Biomedical Engineering, Mayo Clinic College of Medicine, Mayo Clinic, Rochester, Minnesota 55902, United States of America
| | - Michael J. Yaszemski
- Department of Molecular Pharmacology and Experimental Therapeutics, Mayo Graduate School, Mayo Clinic College of Medicine, Mayo Clinic, Rochester, Minnesota 55902, United States of America
- Division of Orthopaedic Research, Department of Physiology and Biomedical Engineering, Mayo Clinic College of Medicine, Mayo Clinic, Rochester, Minnesota 55902, United States of America
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Wang MO, Piard CM, Melchiorri A, Dreher ML, Fisher JP. Evaluating changes in structure and cytotoxicity during in vitro degradation of three-dimensional printed scaffolds. Tissue Eng Part A 2015; 21:1642-53. [PMID: 25627168 PMCID: PMC4426330 DOI: 10.1089/ten.tea.2014.0495] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2014] [Accepted: 01/26/2015] [Indexed: 01/04/2023] Open
Abstract
This study evaluated the structural, mechanical, and cytocompatibility changes of three-dimensional (3D) printed porous polymer scaffolds during degradation. Three porous scaffold designs were fabricated from a poly(propylene fumarate) (PPF) resin. PPF is a hydrolytically degradable polymer that has been well characterized for applications in bone tissue engineering. Over a 224 day period, scaffolds were hydrolytically degraded and changes in scaffold parameters, such as porosity and pore size, were measured nondestructively using micro-computed tomography. In addition, changes in scaffold mechanical properties were also measured during degradation. Scaffold degradation was verified through decreasing pH and increasing mass loss as well as the formation of micropores and surface channels. Current methods to evaluate polymer cytotoxicity have been well established; however, the ability to evaluate toxicity of an absorbable polymer as it degrades has not been well explored. This study, therefore, also proposes a novel method to evaluate the cytotoxicity of the absorbable scaffolds using a combination of degradation extract, phosphate-buffered saline, and cell culture media. Fibroblasts were incubated with this combination media, and cytotoxicity was evaluated using XTT assay and fluorescence imaging. Cell culture testing demonstrated that the 3D-printed scaffold extracts did not induce significant cell death. In addition, results showed that over a 224 day time period, porous PPF scaffolds provided mechanical stability while degrading. Overall, these results show that degradable, 3D-printed PPF scaffolds are suitable for bone tissue engineering through the use of a novel toxicity during degradation assay.
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Affiliation(s)
- Martha O. Wang
- Fischell Department of Bioengineering, University of Maryland, College Park, Maryland
| | - Charlotte M. Piard
- Fischell Department of Bioengineering, University of Maryland, College Park, Maryland
| | - Anthony Melchiorri
- Fischell Department of Bioengineering, University of Maryland, College Park, Maryland
| | - Maureen L. Dreher
- Division of Applied Mechanics, Office of Science and Engineering Laboratories, Center for Devices and Radiological Health, Food and Drug Administration, Silver Spring, Maryland
| | - John P. Fisher
- Fischell Department of Bioengineering, University of Maryland, College Park, Maryland
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Liu X, Xu X, Zhang C. Interface morphology and DFT computation of L-valinium fumarate. Spectrochim Acta A Mol Biomol Spectrosc 2015; 136 Pt B:162-167. [PMID: 25261403 DOI: 10.1016/j.saa.2014.08.105] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2014] [Revised: 08/09/2014] [Accepted: 08/24/2014] [Indexed: 06/03/2023]
Abstract
Based on crystal surface observation from AFM, the growth mechanism of L-valinium fumarate (LVF) crystal is in agreement with continuous growth mode. It is suggested that the microcrystals and pits may lead to the formation of inclusion macrodefects during growth. In addition, quantum chemical computations based on density functional theory (DFT) have been performed on LVF. The optimized molecular geometry, natural bond orbital analysis, Mulliken's net charges and frontier molecular orbital analysis have been calculated. The linear polarizability and first hyperpolarizability have also been computed.
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Affiliation(s)
- Xiaojing Liu
- School of Physics and Technology, University of Jinan, Jinan 250022, Shandong Province, PR China.
| | - Xijin Xu
- School of Physics and Technology, University of Jinan, Jinan 250022, Shandong Province, PR China
| | - Changwen Zhang
- School of Physics and Technology, University of Jinan, Jinan 250022, Shandong Province, PR China
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Zheng L, Cardaci S, Jerby L, MacKenzie ED, Sciacovelli M, Johnson TI, Gaude E, King A, Leach JDG, Edrada-Ebel R, Hedley A, Morrice NA, Kalna G, Blyth K, Ruppin E, Frezza C, Gottlieb E. Fumarate induces redox-dependent senescence by modifying glutathione metabolism. Nat Commun 2015; 6:6001. [PMID: 25613188 PMCID: PMC4340546 DOI: 10.1038/ncomms7001] [Citation(s) in RCA: 183] [Impact Index Per Article: 20.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2014] [Accepted: 12/01/2014] [Indexed: 12/11/2022] Open
Abstract
Mutations in the tricarboxylic acid (TCA) cycle enzyme fumarate hydratase (FH) are associated with a highly malignant form of renal cancer. We combined analytical chemistry and metabolic computational modelling to investigate the metabolic implications of FH loss in immortalized and primary mouse kidney cells. Here, we show that the accumulation of fumarate caused by the inactivation of FH leads to oxidative stress that is mediated by the formation of succinicGSH, a covalent adduct between fumarate and glutathione. Chronic succination of GSH, caused by the loss of FH, or by exogenous fumarate, leads to persistent oxidative stress and cellular senescence in vitro and in vivo. Importantly, the ablation of p21, a key mediator of senescence, in Fh1-deficient mice resulted in the transformation of benign renal cysts into a hyperplastic lesion, suggesting that fumarate-induced senescence needs to be bypassed for the initiation of renal cancers.
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Affiliation(s)
- Liang Zheng
- Cancer Research UK, Beatson Institute, Switchback Road, Glasgow G61 1BD, UK
| | - Simone Cardaci
- Cancer Research UK, Beatson Institute, Switchback Road, Glasgow G61 1BD, UK
| | - Livnat Jerby
- The Blavatnik School of Computer Science—Tel Aviv University, Tel Aviv 69978, Israel
| | | | - Marco Sciacovelli
- MRC Cancer Unit, University of Cambridge, Hutchison/MRC Research Centre, Box 197, Cambridge Biomedical Campus, Cambridge CB2 0XZ, UK
| | - T. Isaac Johnson
- MRC Cancer Unit, University of Cambridge, Hutchison/MRC Research Centre, Box 197, Cambridge Biomedical Campus, Cambridge CB2 0XZ, UK
| | - Edoardo Gaude
- MRC Cancer Unit, University of Cambridge, Hutchison/MRC Research Centre, Box 197, Cambridge Biomedical Campus, Cambridge CB2 0XZ, UK
| | - Ayala King
- Institute of Cancer Sciences, University of Glasgow, Switchback Road, Glasgow G61 1BD, UK
| | - Joshua D. G. Leach
- School of Veterinary Medicine, College of Medical Veterinary and Life Sciences, University of Glasgow, Bearsden Road, Glasgow G61 1QH, UK
| | - RuAngelie Edrada-Ebel
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, 16 Richmond Street, Glasgow G1 1XQ, UK
| | - Ann Hedley
- Cancer Research UK, Beatson Institute, Switchback Road, Glasgow G61 1BD, UK
| | | | - Gabriela Kalna
- Cancer Research UK, Beatson Institute, Switchback Road, Glasgow G61 1BD, UK
| | - Karen Blyth
- Cancer Research UK, Beatson Institute, Switchback Road, Glasgow G61 1BD, UK
| | - Eytan Ruppin
- The Blavatnik School of Computer Science—Tel Aviv University, Tel Aviv 69978, Israel
- The Sackler School of Medicine—Tel Aviv University, Tel Aviv 69978, Israel
| | - Christian Frezza
- MRC Cancer Unit, University of Cambridge, Hutchison/MRC Research Centre, Box 197, Cambridge Biomedical Campus, Cambridge CB2 0XZ, UK
| | - Eyal Gottlieb
- Cancer Research UK, Beatson Institute, Switchback Road, Glasgow G61 1BD, UK
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Wang MO, Vorwald CE, Dreher ML, Mott EJ, Cheng MH, Cinar A, Mehdizadeh H, Somo S, Dean D, Brey EM, Fisher JP. Evaluating 3D-printed biomaterials as scaffolds for vascularized bone tissue engineering. Adv Mater 2015; 27:138-44. [PMID: 25387454 PMCID: PMC4404492 DOI: 10.1002/adma.201403943] [Citation(s) in RCA: 162] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2014] [Indexed: 05/19/2023]
Abstract
There is an unmet need for a consistent set of tools for the evaluation of 3D-printed constructs. A toolbox developed to design, characterize, and evaluate 3D-printed poly(propylene fumarate) scaffolds is proposed for vascularized engineered tissues. This toolbox combines modular design and non-destructive fabricated design evaluation, evaluates biocompatibility and mechanical properties, and models angiogenesis.
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Affiliation(s)
- Martha O. Wang
- Fischell Department of Bioengineering, 3238 Jeong H. Kim Engineering Building, University of Maryland, College Park, MD
| | - Charlotte E. Vorwald
- Fischell Department of Bioengineering, 3238 Jeong H. Kim Engineering Building, University of Maryland, College Park, MD
| | - Maureen L. Dreher
- Division of Solid and Fluid Mechanics, Office of Science and Engineering Laboratories, Center for Devices and Radiological Health, Food and Drug Administration, 10903 New Hampshire Ave, Silver Spring, MD
| | - Eric J. Mott
- Department of Plastic Surgery, Ohio State University, 460 West 12th Avenue, Columbus, OH
| | - Ming-Huei Cheng
- Division of Reconstructive Microsurgery, Department of Plastic and Reconstructive Surgery, Chang Gung Memorial Hospital, College of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Ali Cinar
- Department of Chemical and Biological Engineering, Illinois Institute of Technology, 10 West 33rd Street, Chicago, IL
| | - Hamidreza Mehdizadeh
- Department of Chemical and Biological Engineering, Illinois Institute of Technology, 10 West 33rd Street, Chicago, IL
| | - Sami Somo
- Department of Biomedical Engineering, Illinois Institute of Technology, 3255 South Dearborn Street, Chicago, IL
| | - David Dean
- Department of Plastic Surgery, Ohio State University, 460 West 12th Avenue, Columbus, OH
| | - Eric M. Brey
- Department of Biomedical Engineering, Illinois Institute of Technology, 3255 South Dearborn Street, Chicago, IL
- Research Service, Hines VA Hospital, 5000 South 5th Avenue, Hines, IL
| | - John P. Fisher
- Fischell Department of Bioengineering, 3238 Jeong H. Kim Engineering Building, University of Maryland, College Park, MD
- Corresponding Author: John P. Fisher, Ph.D., Fischell Family Distinguished Professor of Bioengineering, Fischell Department of Bioengineering, University of Maryland, 3238 Jeong H. Kim Building, College Park, Maryland 20742, Work: 301 405 7475, Fax: 301 314 6868, , Web Site: http://www.terpconnect.umd.edu/~jpfisher
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Bornet A, Ji X, Mammoli D, Vuichoud B, Milani J, Bodenhausen G, Jannin S. Long-lived states of magnetically equivalent spins populated by dissolution-DNP and revealed by enzymatic reactions. Chemistry 2014; 20:17113-8. [PMID: 25346515 PMCID: PMC4497350 DOI: 10.1002/chem.201404967] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2014] [Indexed: 12/04/2022]
Abstract
Hyperpolarization by dissolution dynamic nuclear polarization (D-DNP) offers a way of enhancing NMR signals by up to five orders of magnitude in metabolites and other small molecules. Nevertheless, the lifetime of hyperpolarization is inexorably limited, as it decays toward thermal equilibrium with the nuclear spin-lattice relaxation time. This lifetime can be extended by storing the hyperpolarization in the form of long-lived states (LLS) that are immune to most dominant relaxation mechanisms. Levitt and co-workers have shown how LLS can be prepared for a pair of inequivalent spins by D-DNP. Here, we demonstrate that this approach can also be applied to magnetically equivalent pairs of spins such as the two protons of fumarate, which can have very long LLS lifetimes. As in the case of para-hydrogen, these hyperpolarized equivalent LLS (HELLS) are not magnetically active. However, a chemical reaction such as the enzymatic conversion of fumarate into malate can break the magnetic equivalence and reveal intense NMR signals.
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Affiliation(s)
- Aurélien Bornet
- Institut des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne1015 Lausanne (Switzerland), Fax: (+41) 76-693-9435
| | - Xiao Ji
- Institut des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne1015 Lausanne (Switzerland), Fax: (+41) 76-693-9435
| | - Daniele Mammoli
- Institut des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne1015 Lausanne (Switzerland), Fax: (+41) 76-693-9435
| | - Basile Vuichoud
- Institut des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne1015 Lausanne (Switzerland), Fax: (+41) 76-693-9435
| | - Jonas Milani
- Institut des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne1015 Lausanne (Switzerland), Fax: (+41) 76-693-9435
| | - Geoffrey Bodenhausen
- Institut des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne1015 Lausanne (Switzerland), Fax: (+41) 76-693-9435
- École Normale Supérieure-PSL Research University, Département de Chimie24 rue Lhomond, 75005 Paris (France)
- Sorbonne UniversitésUPMC Univ Paris 06, 4 place Jussieu, 75005 Paris (France)
- CNRS, UMR 7203 LBM, 75005 Paris (France)
| | - Sami Jannin
- Institut des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne1015 Lausanne (Switzerland), Fax: (+41) 76-693-9435
- Bruker BioSpin AG, Industriestrasse 268117 Fällanden (Switzerland)
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38
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Refat MS. Preparation of manganese(II), chromium(III) and ferric(III) oxides nanoparticles in situ metal citraconate complexes frameworks. Spectrochim Acta A Mol Biomol Spectrosc 2014; 133:281-291. [PMID: 24952090 DOI: 10.1016/j.saa.2014.05.066] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [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: 04/05/2014] [Revised: 05/06/2014] [Accepted: 05/14/2014] [Indexed: 06/03/2023]
Abstract
The new reactions of some divalent and trivalent transition metal ions (Mn(II), Cr(III), and Fe(III)) with citraconic acid has been studied. The obtained results indicate the formation of citraconic acid compounds with molar ratio of metal to citraconic acid of 2:2 or 2:3 with general formulas Mn2(C5H4O4)2 or M2(C5H4O4)3⋅nH2O where n=6 for Cr, and Fe(III). The thermal decomposition of the crystalline solid complexes was investigated. The IR spectra of citraconate suggested that the carboxylic groups are bidentatically bridging and chelating. In the course of decomposition the complexes are dehydrated and then decompose either directly to oxides in only one step or with intermediate formation of oxocarbonates. This proposal dealing the preparation of MnO2, Fe2O3 and Cr2O3 nanoparticles. The crystalline structure of oxide products were checked by X-ray powder diffraction (XRD), and the morphology of particles by scanning electron microscopy (SEM).
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Affiliation(s)
- Moamen S Refat
- Chemistry Department, Faculty of Science, Taif University, P.O. Box 888, Al-Hawiah, Taif 21974, Saudi Arabia; Chemistry Department, Faculty of Science, Port Said University, Port Said, Egypt.
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Gill AJ, Kovacsics CE, Cross SA, Vance PJ, Kolson LL, Jordan-Sciutto KL, Gelman BB, Kolson DL. Heme oxygenase-1 deficiency accompanies neuropathogenesis of HIV-associated neurocognitive disorders. J Clin Invest 2014; 124:4459-72. [PMID: 25202977 DOI: 10.1172/jci72279] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2013] [Accepted: 08/04/2014] [Indexed: 11/17/2022] Open
Abstract
Heme oxygenase-1 (HO-1) is an inducible, detoxifying enzyme that is critical for limiting oxidative stress, inflammation, and cellular injury within the CNS and other tissues. Here, we demonstrate a deficiency of HO-1 expression in the brains of HIV-infected individuals. This HO-1 deficiency correlated with cognitive dysfunction, HIV replication in the CNS, and neuroimmune activation. In vitro analysis of HO-1 expression in HIV-infected macrophages, a primary CNS HIV reservoir along with microglia, demonstrated a decrease in HO-1 as HIV replication increased. HO-1 deficiency correlated with increased culture supernatant glutamate and neurotoxicity, suggesting a link among HIV infection, macrophage HO-1 deficiency, and neurodegeneration. HO-1 siRNA knockdown and HO enzymatic inhibition in HIV-infected macrophages increased supernatant glutamate and neurotoxicity. In contrast, increasing HO-1 expression through siRNA derepression or with nonselective pharmacologic inducers, including the CNS-penetrating drug dimethyl fumarate (DMF), decreased supernatant glutamate and neurotoxicity. Furthermore, IFN-γ, which is increased in CNS HIV infection, reduced HO-1 expression in cultured human astrocytes and macrophages. These findings indicate that HO-1 is a protective host factor against HIV-mediated neurodegeneration and suggest that HO-1 deficiency contributes to this degeneration. Furthermore, these results suggest that HO-1 induction in the CNS of HIV-infected patients on antiretroviral therapy could potentially protect against neurodegeneration and associated cognitive dysfunction.
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40
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Hsieh JY, Liu JH, Yang PC, Lin CL, Liu GY, Hung HC. Fumarate analogs act as allosteric inhibitors of the human mitochondrial NAD(P)+-dependent malic enzyme. PLoS One 2014; 9:e98385. [PMID: 24911153 PMCID: PMC4049574 DOI: 10.1371/journal.pone.0098385] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2014] [Accepted: 05/02/2014] [Indexed: 11/20/2022] Open
Abstract
Human mitochondrial NAD(P)+-dependent malic enzyme (m-NAD(P)-ME) is allosterically activated by the four-carbon trans dicarboxylic acid, fumarate. Previous studies have suggested that the dicarboxylic acid in a trans conformation around the carbon-carbon double bond is required for the allosteric activation of the enzyme. In this paper, the allosteric effects of fumarate analogs on m-NAD(P)-ME are investigated. Two fumarate-insensitive mutants, m-NAD(P)-ME_R67A/R91A and m-NAD(P)-ME_K57S/E59N/K73E/D102S, as well as c-NADP-ME, were used as the negative controls. Among these analogs, mesaconate, trans-aconitate, monomethyl fumarate and monoethyl fumarate were allosteric activators of the enzyme, while oxaloacetate, diethyl oxalacetate, and dimethyl fumarate were found to be allosteric inhibitors of human m-NAD(P)-ME. The IC50 value for diethyl oxalacetate was approximately 2.5 mM. This paper suggests that the allosteric inhibitors may impede the conformational change from open form to closed form and therefore inhibit m-NAD(P)-ME enzyme activity.
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Affiliation(s)
- Ju-Yi Hsieh
- Department of Life Sciences, National Chung Hsing University, Taichung, Taiwan
| | - Jyung-Hurng Liu
- Department of Life Sciences, National Chung Hsing University, Taichung, Taiwan
- Institute of Genomics and Bioinformatics, National Chung Hsing University, Taichung, Taiwan
| | - Pai-Chun Yang
- Department of Life Sciences, National Chung Hsing University, Taichung, Taiwan
| | - Chi-Li Lin
- Institute of Medicine, Chung Shan Medical University, Taichung, Taiwan
| | - Guang-Yaw Liu
- Institute of Microbiology & Immunology, Chung Shan Medical University, and Division of Allergy, Immunology, and Rheumatology, Chung Shan Medical University Hospital, Taichung, Taiwan
- * E-mail: (HCH); (GYL)
| | - Hui-Chih Hung
- Department of Life Sciences, National Chung Hsing University, Taichung, Taiwan
- Institute of Genomics and Bioinformatics, National Chung Hsing University, Taichung, Taiwan
- Agricultural Biotechnology Center (ABC), National Chung Hsing University, Taichung, Taiwan
- * E-mail: (HCH); (GYL)
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Rousselle C, Pernelet-Joly V, Mourton-Gilles C, Lepoittevin JP, Vincent R, Lefranc A, Garnier R. Risk assessment of dimethylfumarate residues in dwellings following contamination by treated furniture. Risk Anal 2014; 34:879-888. [PMID: 24329910 DOI: 10.1111/risa.12147] [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] [Indexed: 06/03/2023]
Abstract
Recently, numerous cases of dermatitis induced by dimethylfumarate (DMFu) have been reported in Europe. DMFu has been used to prevent mold development in various items, although it is not registered as a biocide. In France, from October 2008 to December 2009, more than 100 cases were reported. Despite a ban on articles containing DMFu and the removal of potentially contaminated products, some people were still suffering from dermatitis or other health problems. The French Agency for Food, Environmental and Occupational Health & Safety was mandated to assess whether the existence in the past of DMFu-contaminated items in dwellings could continue to pose a threat to the health of inhabitants. A risk assessment was performed based on the classical risk analysis approach for environmental contaminants. Hazard assessment of DMFu with regard to its sensitizing properties was performed, based on human case reports collected in France between January 2009 and February 2010. For around half of the 132 individual cases reported, the causal link to DMFu was considered at least probable. An Organisation for Economic Co-Operation and Development (OECD) local lymph node assay performed in a study on mice showed strong sensitizing potential for DMFu. Exposure was assessed by measuring DMFu in items sampled in preselected dwellings. These investigations demonstrated that DMFu exposure can persist after removal of the primary contaminated items. We therefore concluded that there was clearly a risk of skin reactions in patients previously sensitized to DMFu. Furthermore, the available data do not support the existence of significant health effects through the respiratory route.
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Affiliation(s)
- C Rousselle
- French Agency for Food, Environmental and Occupational Health & Safety (ANSES), Risk Assessment Department, Maisons-Alfort, France
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42
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Si GN, Chen L, Li BG. [Theoretical modeling and experimental research on direct compaction characteristics of multi-component pharmaceutical powders based on the Kawakita equation]. Yao Xue Xue Bao 2014; 49:550-557. [PMID: 24974476] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Base on the Kawakita powder compression equation, a general theoretical model for predicting the compression characteristics of multi-components pharmaceutical powders with different mass ratios was developed. The uniaxial flat-face compression tests of powder lactose, starch and microcrystalline cellulose were carried out, separately. Therefore, the Kawakita equation parameters of the powder materials were obtained. The uniaxial flat-face compression tests of the powder mixtures of lactose, starch, microcrystalline cellulose and sodium stearyl fumarate with five mass ratios were conducted, through which, the correlation between mixture density and loading pressure and the Kawakita equation curves were obtained. Finally, the theoretical prediction values were compared with experimental results. The analysis showed that the errors in predicting mixture densities were less than 5.0% and the errors of Kawakita vertical coordinate were within 4.6%, which indicated that the theoretical model could be used to predict the direct compaction characteristics of multi-component pharmaceutical powders.
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43
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Marco-Rius I, Bohndiek SE, Kettunen MI, Larkin TJ, Basharat M, Seeley C, Brindle KM. Quantitation of a spin polarization-induced nuclear Overhauser effect (SPINOE) between a hyperpolarized (13) C-labeled cell metabolite and water protons. Contrast Media Mol Imaging 2014; 9:182-6. [PMID: 24523064 PMCID: PMC4265858 DOI: 10.1002/cmmi.1556] [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] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/18/2013] [Revised: 05/25/2013] [Accepted: 06/22/2013] [Indexed: 01/19/2023]
Abstract
The spin polarization-induced nuclear Overhauser effect (SPINOE) describes the enhancement of spin polarization of solvent nuclei by the hyperpolarized spins of a solute. In this communication we demonstrate that SPINOEs can be observed between [1,4-(13) C2 ]fumarate, hyperpolarized using the dissolution dynamic nuclear polarization technique, and solvent water protons. We derive a theoretical expression for the expected enhancement and demonstrate that this fits well with experimental measurements. Although the magnitude of the effect is relatively small (around 2% measured here), the SPINOE increases at lower field strengths, so that at clinically relevant magnetic fields (1.5-3 T) it may be possible to track the passage through the circulation of a bolus containing a hyperpolarized (13) C-labeled substrate through the increase in solvent water (1) H signal.
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Affiliation(s)
- Irene Marco-Rius
- Department of Biochemistry, University of Cambridge and Cancer Research UK, Cambridge Research InstituteCambridge, UK
| | - Sarah E Bohndiek
- Department of Biochemistry, University of Cambridge and Cancer Research UK, Cambridge Research InstituteCambridge, UK
| | - Mikko I Kettunen
- Department of Biochemistry, University of Cambridge and Cancer Research UK, Cambridge Research InstituteCambridge, UK
| | - Timothy J Larkin
- Department of Biochemistry, University of Cambridge and Cancer Research UK, Cambridge Research InstituteCambridge, UK
| | - Meer Basharat
- Department of Biochemistry, University of Cambridge and Cancer Research UK, Cambridge Research InstituteCambridge, UK
| | - Colm Seeley
- Department of Biochemistry, University of Cambridge and Cancer Research UK, Cambridge Research InstituteCambridge, UK
| | - Kevin M Brindle
- Department of Biochemistry, University of Cambridge and Cancer Research UK, Cambridge Research InstituteCambridge, UK
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Mohammed M, Ch S, Ch RV. Aniline is an inducer, and not a precursor, for indole derivatives in Rubrivivax benzoatilyticus JA2. PLoS One 2014; 9:e87503. [PMID: 24533057 PMCID: PMC3922755 DOI: 10.1371/journal.pone.0087503] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2013] [Accepted: 12/27/2013] [Indexed: 11/19/2022] Open
Abstract
Rubrivivax benzoatilyticus JA2 and other anoxygenic photosynthetic bacteria produce indole derivatives when exposed to aniline, a xenobiotic compound. Though this phenomenon has been reported previously, the role of aniline in the production of indoles is still a biochemical riddle. The present study aims at understanding the specific role of aniline (as precursor or stimulator) in the production of indoles and elucidating the biochemical pathway of indoles in aniline-exposed cells by using stable isotope approaches. Metabolic profiling revealed tryptophan accumulation only in aniline exposed cells along with indole 3-acetic acid (IAA) and indole 3-aldehyde (IAld), the two major catabolites of tryptophan. Deuterium labelled aniline feeding studies revealed that aniline is not a precursor of indoles in strain JA2. Further, production of indoles only in aniline-exposed cells suggests that aniline is an indoles stimulator. In addition, production of indoles depended on the presence of a carbon source, and production enhanced when carbon sources were added to the culture. Isotope labelled fumarate feeding identified, fumarate as the precursor of indole, indicating de novo synthesis of indoles. Glyphosate (shikimate pathway inhibitor) inhibited the indoles production, accumulation of tryptophan, IAA and IAld indicating that indoles synthesis in strain JA2 occurs via the de novo shikimate pathway. The up-regulation of anthranilate synthase gene and induction of anthranilate synthase activity correlated well with tryptophan production in strain JA2. Induction of tryptophan aminotransferase and tryptophan 2-monooxygenase activities corroborated well with IAA levels, suggesting that tryptophan catabolism occurs simultaneously in aniline exposed cells. Our study demonstrates that aniline (stress) stimulates tryptophan/indoles synthesis via the shikimate pathway by possibly modulating the metabolic pathway.
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Affiliation(s)
- Mujahid Mohammed
- Department of Plant Sciences, School of Life Sciences, University of Hyderabad, Hyderabad, India
| | - Sasikala Ch
- Bacterial Discovery Laboratory, Centre for Environment, IST, J NT University Hyderabad, Kukatpally, Hyderabad, India
| | - Ramana V. Ch
- Department of Plant Sciences, School of Life Sciences, University of Hyderabad, Hyderabad, India
- * E-mail:
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Lendvai N, Pawlosky R, Bullova P, Eisenhofer G, Patocs A, Veech RL, Pacak K. Succinate-to-fumarate ratio as a new metabolic marker to detect the presence of SDHB/D-related paraganglioma: initial experimental and ex vivo findings. Endocrinology 2014; 155:27-32. [PMID: 24189137 PMCID: PMC5398636 DOI: 10.1210/en.2013-1549] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Pheochromocytomas (PHEOs) and paragangliomas (PGLs; extra-adrenal tumors) are rare neuroendocrine chromaffin cell tumors with a hereditary background in about 30%-35%. Those caused by succinate dehydrogenase subunit B (SDHB) germline mutations are associated with a high metastatic potential and ultimately higher patient mortality. Succinate dehydrogenase converts succinate to fumarate, uniquely linking the Krebs cycle and oxidative phosphorylation. SDH mutations result in the accumulation of succinate associated with various metabolic disturbances and the shift to aerobic glycolysis in tumor tissue. In the present study, we measured succinate and fumarate levels in mouse pheochromocytoma (MPC) and mouse tumor tissue (MTT) cells and in 10 apparently sporadic, 10 SDHB-, 5 SDHD-, and 2 neurofibromatosis 1-related PHEOs/PGLs and plasma samples using mass spectrometry. We found that the succinate-to-fumarate ratio was significantly higher in the SDHB- and SDHD-related PGLs than in apparently sporadic and neurofibromatosis 1-related PHEOs/PGLs (P = .0376). To further support our data, we silenced SDHB expression in MPC and MTT cells and evaluated the succinate and fumarate levels. Compared with control samples, SDHB-silenced MTT cells also showed an increase in the succinate-to-fumarate ratio (MTT cells: 2.45 vs 7.53), similar to the findings in SDHB-related PGLs. The present findings for the first time demonstrate a significantly increased succinate-to-fumarate ratio in SDHB/D-related PGLs and thus suggest this ratio may be used as a new metabolic marker for the detection of SDHB/D-related PHEOs/PGLs.
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Affiliation(s)
- Nikoletta Lendvai
- Program in Reproductive and Adult Endocrinology (N.L., P.B., K.P.), Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland 20892; Second Department of Medicine (N.L.), Semmelweis University, Budapest, Hungary 1088; Section on Metabolic Control Analysis (R.P., R.L.V.), National Institute on Alcohol Abuse and Alcoholism, National Institutes of Health, Rockville, Maryland 20852; Department of Molecular Medicine (P.B.), Institute of Virology, Slovak Academy of Sciences, Bratislava, Slovak Republic 84505; Institute of Clinical Chemistry and Laboratory Medicine (G.E.), University Hospital Carl Gustav Carus at the TU Dresden, Dresden, Germany; Department of Medicine III (G.E.), University Hospital Carl Gustav Carus at the TU Dresden, Dresden, Germany 01307; Molecular Medicine Research Group (A.P.), Hungarian Academy of Sciences and Semmelweis University, Budapest, Hungary; and Department of Laboratory Medicine Institute (A.P.), Central Isotope Laboratory, Semmelweis University, Budapest, Hungary 1088
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Shrestha PM, Rotaru AE, Aklujkar M, Liu F, Shrestha M, Summers ZM, Malvankar N, Flores DC, Lovley DR. Syntrophic growth with direct interspecies electron transfer as the primary mechanism for energy exchange. Environ Microbiol Rep 2013; 5:904-10. [PMID: 24249299 DOI: 10.1111/1758-2229.12093] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2013] [Accepted: 08/07/2013] [Indexed: 05/26/2023]
Abstract
Direct interspecies electron transfer (DIET) through biological electrical connections is an alternative to interspecies H2 transfer as a mechanism for electron exchange in syntrophic cultures. However, it has not previously been determined whether electrons received via DIET yield energy to support cell growth. In order to investigate this, co-cultures of Geobacter metallireducens, which can transfer electrons to wild-type G. sulfurreducens via DIET, were established with a citrate synthase-deficient G. sulfurreducens strain that can receive electrons for respiration through DIET only. In a medium with ethanol as the electron donor and fumarate as the electron acceptor, co-cultures with the citrate synthase-deficient G. sulfurreducens strain metabolized ethanol as fast as co-cultures with wild-type, but the acetate that G. metallireducens generated from ethanol oxidation accumulated. The lack of acetate metabolism resulted in less fumarate reduction and lower cell abundance of G. sulfurreducens. RNAseq analysis of transcript abundance was consistent with a lack of acetate metabolism in G. sulfurreducens and revealed gene expression levels for the uptake hydrogenase, formate dehydrogenase, the pilus-associated c-type cytochrome OmcS and pili consistent with electron transfer via DIET. These results suggest that electrons transferred via DIET can serve as the sole energy source to support anaerobic respiration.
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Pasqualone M, Oberti TG, Andreetta HA, Cortizo MS. Fumarate copolymers-based membranes overlooking future transdermal delivery devices: synthesis and properties. J Mater Sci Mater Med 2013; 24:1683-1692. [PMID: 23588672 DOI: 10.1007/s10856-013-4925-2] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2013] [Accepted: 04/04/2013] [Indexed: 06/02/2023]
Abstract
Novel copolymers of vinyl acetate and dialkylfumarates, poly(VA-co-DRF) with R = isopropyl (DIPF) or octan-2-yl (DOF), were synthesized by radical copolymerization under microwave conditions. The products were characterized by (1)H NMR and FTIR spectroscopies, size exclusion chromatography and differential scanning calorimetry. Based on these copolymers three membranes supported on polyvinyl alcohol were prepared and their morphology, swelling and mechanical properties were studied. The swelling kinetic was analyzed and interpreted in light of the Fick transport model, showing that the water transport occurs through a non-Fickian diffusion mechanism. The results show that the membrane prepared of poly(VA-co-DOF) exhibited excellent properties as potential platform for transdermal delivery system: they exhibited good tensile strength, moderated swelling and form thin and transparent films.
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Affiliation(s)
- Magalí Pasqualone
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), CONICET, CCT, La Plata, Argentina
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Pirog TP, Antoniuk SI, Konon AD, Shevchuk TA, Parfeniuk SA. [Influence of pH on synthesis of Acinetobacter calcoaceticus IMV B-7241 biosurfactants]. Mikrobiol Z 2013; 75:32-40. [PMID: 23866584] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Synthesis of extracellular metabolites with surface-active and emulsifying properties, pH being maintained at the level of 5.8-8.0, in the process of cultivation of Acinetobacter calcoaceticus IMV B-7241 in the medium with ethanol (2%, volume part) was investigated. It is established that the neutral value of pH is optimal for synthesis of surface-active substances (SAS, biosurfactants) of A. calcoaceticus IMV B-7241. The maintenance of pH at the level of 7.0 with the help of KOH solution was accompanied by the 1.8-fold increase of the amount of synthesized SAS as compared with the process indicators without regulation of pH. The substitution of KOH by NaOH to maintain pH at the optimal level led to the 1.2-1.5-fold decrease of SAS concentration that is determined by the inhibiting effect of sodium cations on activity of biosynthesis enzymes of surface-active amino- and glycolipids of A. calcoaceticus IMV B-7241. The medium neutralization by KOH solution in the process of cultivation of the strain IMV B-7241 with further introduction of fumarate (0.01%) and citrate (0.01%) at the end of the exponential phase was accompanied by the 1.2-fold increase of the amount of synthesized SAS compared with the indicators of the analogous process without neutralization and by the 3 5-fold increase compared with bacteria cultivation on ethanol without organic acids and pH regulation.
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Desai V, Kowshik M. Synthesis and characterization of fumaric acid functionalized AgCl/titania nanocomposite with enhanced antibacterial activity. J Nanosci Nanotechnol 2013; 13:2826-2834. [PMID: 23763167 DOI: 10.1166/jnn.2013.7370] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [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
Silver based antimicrobial agents with TiO2 as a host support (AgCl/TiO2) are increasingly being evaluated for disinfection and therapeutic applications. In this work TiO2 supported silver chloride nanocomposites were synthesized and functionalized with fumaric acid. X-ray diffraction results showed that the TiO2 was in anatase phase and AgCI was in the cubic chalcoargyrite phase. The functionalization was confirmed by FTIR analysis. The fumaric acid functionalized AgCl/TiO2 (Fu-AgCl/TiO2) showed uniform particle size distribution in the range of 4-5 nm. The intensity size distribution of Fu-AgCl/TiO2 nanocomposite by DLS showed an average particle diameter of -290 nm with a polydispersity index (P. I.) of 0.47. Further, a high BET surface area of -320.7 m2/g was observed for Fu-AgCl/TiO2 with an average pore size distribution of 3.8 nm. The antimicrobial activity of Fu-AgCl/TiO2 and AgCl/TiO2 was evaluated by determining the MIC and MBC values, and it was observed that Fu-AgCl/TiO2 exhibited better antimicrobial activity as compared to the unfunctionalized nanocomposite. The antimicrobial activity of Fu-AgCl/TiO2 is mainly attributed to its superior physicochemical properties coupled with the synergistic action of both fumaric acid and silver ions. The changes in the cytoplasmic membrane of the cells due to the formation of intracellular ROS were observed by SEM imaging.
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Affiliation(s)
- Vilas Desai
- Department of Biological Sciences, Birla Institute of Technology and Science Pilani, K K Birla Goa Campus, Zuarinagar, Goa 403726, India
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Bongio M, van den Beucken JJJ, Nejadnik MR, Tahmasebi Birgani Z, Habibovic P, Kinard LA, Kasper FK, Mikos AG, Leeuwenburgh SCG, Jansen JA. Subcutaneous tissue response and osteogenic performance of calcium phosphate nanoparticle-enriched hydrogels in the tibial medullary cavity of guinea pigs. Acta Biomater 2013; 9:5464-74. [PMID: 23107797 DOI: 10.1016/j.actbio.2012.10.026] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2012] [Revised: 10/12/2012] [Accepted: 10/19/2012] [Indexed: 01/24/2023]
Abstract
In the current study, oligo(poly(ethylene glycol) fumarate) (OPF)-based hydrogels were tested for the first time as injectable bone substitute materials. The primary feature of the material design was the incorporation of calcium phosphate (CaP) nanoparticles within the polymeric matrix in order to compare the soft tissue response and bone-forming capacity of plain OPF hydrogels with CaP-enriched OPF hydrogel composites. To that end, pre-set scaffolds were implanted subcutaneously, whereas flowable polymeric precursor solutions were injected in a tibial ablation model in guinea pigs. After 8 weeks of implantation, histological and histomorphometrical evaluation of the subcutaneous scaffolds confirmed the biocompatibility of both types of hydrogels. Nevertheless, OPF hydrogels presented a loose structure, massive cellular infiltration and extensive material degradation compared to OPF-CaP hydrogels that were more compact. Microcomputed tomography and histological and histomorphometrical analyses showed comparable amounts of new trabecular bone in all tibias and some material remnants in the medial and distal regions. Particularly, highly calcified areas were observed in the distal region of OPF-CaP-treated tibias, which indicate a heterogeneous distribution of the mineral phase throughout the hydrogel matrix. This phenomenon can be attributed to either hindered gelation under highly perfused in vivo conditions or a faster degradation rate of the polymeric hydrogel matrix compared to the nanostructured mineral phase, resulting in loss of entrapment of the CaP nanoparticles and subsequent sedimentation.
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Affiliation(s)
- Matilde Bongio
- Department of Biomaterials, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands
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