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Zlotnikov ID, Belogurova NG, Poddubnaya IV, Kudryashova EV. Mucosal Adhesive Chitosan Nanogel Formulations of Antibiotics and Adjuvants (Terpenoids, Flavonoids, etc.) and Their Potential for the Treatment of Infectious Diseases of the Gastrointestinal Tract. Pharmaceutics 2023; 15:2353. [PMID: 37765322 PMCID: PMC10535539 DOI: 10.3390/pharmaceutics15092353] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2023] [Revised: 09/10/2023] [Accepted: 09/12/2023] [Indexed: 09/29/2023] Open
Abstract
Bacterial infections are usually found in the stomach and the first part of the small intestine in association with various pathologies, including ulcers, inflammatory diseases, and sometimes cancer. Treatment options may include combinations of antibiotics with proton pump inhibitors and anti-inflammatory drugs. However, all of them have high systemic exposure and, hence, unfavorable side effects, whereas their exposure in stomach mucus, the predominant location of the bacteria, is limited. Chitosan and nanogels based on chitosan presumably are not absorbed from the gastrointestinal tract and are known to adhere to the mucus. Therefore, they can serve as a basis for the local delivery of antibacterial drugs, increasing their exposure at the predominant location of therapeutic targets, thus improving the risk/benefit ratio. We have used E. coli ATCC 25922 (as a screening model of pathogenic bacteria) and Lactobacilli (as a model of a normal microbiome) to study the antibacterial activity of antibacterial drugs entrapped in a chitosan nanogel. Classical antibiotics were studied in a monotherapeutic regimen as well as in combination with individual terpenoids and flavonoids as adjuvants. It has been shown that levofloxacin (LF) in combination with zephirol demonstrate synergistic effects against E. coli (cell viability decreased by about 50%) and, surprisingly, a much weaker effect against Lactobacilli. A number of other combinations of antibiotic + adjuvant were also shown to be effective. Using FTIR and UV spectroscopy, it has been confirmed that chitosan nanogels with the drug are well adsorbed on the mucosal model, providing prolonged release at the target location. Using an ABTS assay, the antioxidant properties of flavonoids and other drugs are shown, which are potentially necessary to minimize the harmful effects of toxins and radicals produced by pathogens. In vivo experiments (on sturgeon fish) showed the effective action of antibacterial formulations developed based on LF in chitosan nanogels for up to 11 days. Thus, chitosan nanogels loaded with a combination of drugs and adjuvants can be considered as a new strategy for the treatment of infectious diseases of the gastrointestinal tract.
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Affiliation(s)
- Igor D. Zlotnikov
- Faculty of Chemistry, Lomonosov Moscow State University, Leninskie Gory, 1/3, 119991 Moscow, Russia;
| | - Natalya G. Belogurova
- Faculty of Chemistry, Lomonosov Moscow State University, Leninskie Gory, 1/3, 119991 Moscow, Russia;
| | - Irina V. Poddubnaya
- Research Laboratory of Aquatic Environment Protection and Ichthyopathology, Saratov State University of Genetics, Biotechnology and Engineering Named after N.I. Vavilov, 410005 Saratov, Russia;
| | - Elena V. Kudryashova
- Faculty of Chemistry, Lomonosov Moscow State University, Leninskie Gory, 1/3, 119991 Moscow, Russia;
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Štrbac F, Krnjajić S, Maurelli MP, Stojanović D, Simin N, Orčić D, Ratajac R, Petrović K, Knežević G, Cringoli G, Rinaldi L, Bosco A. A Potential Anthelmintic Phytopharmacological Source of Origanum vulgare (L.) Essential Oil against Gastrointestinal Nematodes of Sheep. Animals (Basel) 2022; 13. [PMID: 36611652 DOI: 10.3390/ani13010045] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2022] [Revised: 12/18/2022] [Accepted: 12/19/2022] [Indexed: 12/25/2022] Open
Abstract
The development of anthelmintic resistance in sheep gastrointestinal nematodes (GINs) requires novel strategies for the sustainable control of these parasites. This study aimed to evaluate the anthelmintic efficacy of the Origanum vulgare (L.) essential oil (EO) against sheep GINs and to evaluate the possibility of its use in control practice. The in vitro egg hatch test was conducted at eight different concentrations (50, 12.5, 3.125, 0.781, 0.195, 0.049, 0.025, and 0.0125 mg/mL) of the tested EO. For the in vivo fecal egg count reduction test, the EO of O. vulgare was administrated orally at a mean single dose of 150 mg/kg to sheep from two farms in Southern Italy, whereby potential toxic effects to the hosts were also evaluated. In the egg hatch test, the inhibition of egg hatchability varied from 71.3% to 93.7%, depending on the concentration used. The high anthelmintic potential was confirmed in the fecal egg count reduction test with an average reduction of nematode eggs in feces of 43.2% and 60.1% on days 7 and 14 after treatment, respectively. In addition, no toxic effects were noticed during the clinical examination of sheep or by observing blood count and liver or kidney function test results. The obtained results suggest the strong activity of the O. vulgare EO against sheep GINs, probably due to a high percentage of carvacrol (76.21%), whereby it can be considered safe for sheep at the dose tested in vivo. Therefore, it is suitable for use in veterinary practice as a part of an integrated strategy for the control of sheep GINs.
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Štrbac F, Bosco A, Maurelli MP, Ratajac R, Stojanović D, Simin N, Orčić D, Pušić I, Krnjajić S, Sotiraki S, Saralli G, Cringoli G, Rinaldi L. Anthelmintic Properties of Essential Oils to Control Gastrointestinal Nematodes in Sheep-In Vitro and In Vivo Studies. Vet Sci 2022; 9:vetsci9020093. [PMID: 35202346 PMCID: PMC8880401 DOI: 10.3390/vetsci9020093] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2021] [Revised: 02/08/2022] [Accepted: 02/16/2022] [Indexed: 02/01/2023] Open
Abstract
Herbal products such as essential oils may play a promising role in the treatment of infections caused by gastrointestinal nematodes (GINs). The aim of this study was to evaluate the in vitro potential of 11 essential oils (EOs) and one binary combination of isolated EO compounds, as well as the in vivo anthelmintic efficacy of two EO formulations. Four GIN genera were identified in the coproculture examination: Haemonchus, Trichostrongylus, Teladorsagia and Chabertia. The in vitro egg hatch test (EHT) was performed at six different concentrations (50, 12.5, 3.125, 0.781, 0.195 and 0.049 mg/mL) for each EO, whereas in the in vivo faecal egg count reduction test (FECRT), each EO sample was diluted in sunflower oil and orally administrated at a dose of 100 mg/kg to the different group of animals. In the EHT, the EOs of Origanum vulgare, Foeniculum vulgare, Satureja montana, Satureja hortensis and two types of Thymus vulgaris were the most effective. The dominant compounds of these EOs were carvacrol, thymol, anethol, p-cymene and γ-terpinene, indicating their importance for the anthelmintic activity. In the FECRT, both T. vulgaris EO type 1 and linalool:estragole combination show an anthelmintic potential with a mean effect on FECR of approximately 25%. The results suggest the possible role of tested EOs as anthelmintic agents in sheep farms, although further in vivo tests are needed.
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Affiliation(s)
- Filip Štrbac
- Department of Veterinary Medicine, Faculty of Agriculture, University of Novi Sad, Trg Dositeja Obradovića 8, 21102 Novi Sad, Serbia;
- Correspondence: ; Tel.: +381-613181091
| | - Antonio Bosco
- Department of Veterinary Medicine and Animal Production, University of Naples Federico II, CREMOPAR, Via Federico Delpino 1, 80137 Naples, Italy; (A.B.); (M.P.M.); (G.C.); (L.R.)
| | - Maria Paola Maurelli
- Department of Veterinary Medicine and Animal Production, University of Naples Federico II, CREMOPAR, Via Federico Delpino 1, 80137 Naples, Italy; (A.B.); (M.P.M.); (G.C.); (L.R.)
| | - Radomir Ratajac
- Scientific Veterinary Institute Novi Sad, Rumenački put 20, 21113 Novi Sad, Serbia; (R.R.); (I.P.)
| | - Dragica Stojanović
- Department of Veterinary Medicine, Faculty of Agriculture, University of Novi Sad, Trg Dositeja Obradovića 8, 21102 Novi Sad, Serbia;
| | - Nataša Simin
- Department of Chemistry, Biochemistry and Environmental Protection, Faculty of Sciences, University of Novi Sad, Trg Dositeja Obradovića 3, 21102 Novi Sad, Serbia; (N.S.); (D.O.)
| | - Dejan Orčić
- Department of Chemistry, Biochemistry and Environmental Protection, Faculty of Sciences, University of Novi Sad, Trg Dositeja Obradovića 3, 21102 Novi Sad, Serbia; (N.S.); (D.O.)
| | - Ivan Pušić
- Scientific Veterinary Institute Novi Sad, Rumenački put 20, 21113 Novi Sad, Serbia; (R.R.); (I.P.)
| | - Slobodan Krnjajić
- Institute for Multidisciplinary Research, University of Belgrade, Kneza Višeslava 1, 11030 Belgrade, Serbia;
| | - Smaragda Sotiraki
- Veterinary Research Institute, National Agricultural Research Foundation, NAGREF Campus, 57001 Thessaloniki, Greece;
| | - Giorgio Saralli
- Experimental Zooprophylactic Institute of Lazio and Tuscany M. Aleandri, Via Appia Nuova, 00178 Rome, Italy;
| | - Giuseppe Cringoli
- Department of Veterinary Medicine and Animal Production, University of Naples Federico II, CREMOPAR, Via Federico Delpino 1, 80137 Naples, Italy; (A.B.); (M.P.M.); (G.C.); (L.R.)
| | - Laura Rinaldi
- Department of Veterinary Medicine and Animal Production, University of Naples Federico II, CREMOPAR, Via Federico Delpino 1, 80137 Naples, Italy; (A.B.); (M.P.M.); (G.C.); (L.R.)
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Jiang Q, Ma X, Chai Y, Ma H, Tang F, Hua K, Chen R, Jin Z, Wang X, Ji J, Yang X, Li R, Lian H, Xue M. Reduced Graphene Oxide-Polypyrrole Aerogel-Based Coaxial Heterogeneous Microfiber Enables Ultrasensitive Pressure Monitoring of Living Organisms. ACS Appl Mater Interfaces 2021; 13:5425-5434. [PMID: 33496177 DOI: 10.1021/acsami.0c19949] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Pressure sensors for living organisms can monitor both the movement behavior of the organism and pressure changes of the organ, and they have vast perspectives for the health management information platform and disease diagnostics/treatment through the micropressure changes of organs. Although pressure sensors have been widely integrated with e-skin or other wearable systems for health monitoring, they have not been approved for comprehensive surveillance and monitoring of living organisms due to their unsatisfied sensing performance. To solve the problem, here, we introduce a novel structural design strategy to manufacture reduced graphene oxide-polypyrrole aerogel-based microfibers with a typical coaxial heterogeneous structure, which significantly enhances the sensitivity, resolution, and stability of the derived pressure microsensors. The as-fabricated pressure microsensors exhibit ultrahigh sensitivities of 12.84, 18.27, and 4.46 kPa-1 in the pressure ranges of 0-20, 20-40, and 40-65 Pa, respectively, high resolution (0.2 Pa), and good stability in 450 cycles. Furthermore, the microsensor is applied to detect the movement behavior and organic micropressure changes for mice and serves as a platform for monitoring micropressure for the integrative diagnosis both in vivo and in vitro of organisms.
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Affiliation(s)
- Qianqian Jiang
- Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- School of Chemical & Environmental Engineering, China University of Mining & Technology Beijing, Beijing 100083, China
| | - Xinlei Ma
- Department of Chemistry, Renmin University of China, Beijing 100872, China
| | - Yuqiao Chai
- Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Hui Ma
- Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Feng Tang
- Department of Chemistry, Renmin University of China, Beijing 100872, China
| | - Kun Hua
- Department of Cardiovascular Surgery, Beijing Anzhen Hospital, Capital Medical University, Beijing Institute of Heart, Lung and Blood Vessel Disease, Beijing 100029, China
| | - Ruoqi Chen
- Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Zhaoxia Jin
- Department of Chemistry, Renmin University of China, Beijing 100872, China
| | - Xusheng Wang
- Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Junhui Ji
- Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Xiubin Yang
- Department of Cardiovascular Surgery, Beijing Anzhen Hospital, Capital Medical University, Beijing Institute of Heart, Lung and Blood Vessel Disease, Beijing 100029, China
| | - Rui Li
- School of Advanced Materials, Peking University Shenzhen Graduate School, Shenzhen 518055, China
| | - Huiqin Lian
- College of Materials Science and Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, China
| | - Mianqi Xue
- Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- Beijing National Laboratory for Molecular Sciences, Beijing 100190, China
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Behr-Gross ME, Siklodi B, Le Tallec D, Halder M, Manou I, Sinitskaya N, Bruckner L, Dalmadi B, Kiss L, Redhead K. Collaborative study for the validation of cell line assays for in-process toxicity and antigenicity testing of Clostridium septicum vaccine antigens - Part 2: Optimisation of cell line assays. Pharmeur Bio Sci Notes 2021; 2021:101-156. [PMID: 34078535] [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] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
During the production of clostridial vaccines large numbers of mice are used for various in-process control tests. Replacement in vitro assays had been developed for the testing of the toxins and toxoids of several clostridial species, but none of these assays had been assessed in an international collaborative study. Under the common aegis of the European Partnership for Alternative Approaches to Animal Testing (EPAA) and of the European Directorate for the Quality of Medicines & HealthCare (EDQM), a project on clostridial vaccines for veterinary use was started as part of the EDQM-co-ordinated Biological Standardisation Programme (BSP). Within the framework of this project (coded BSP130) a collaborative study was organised to evaluate Vero cell-based alternative methods to the current mouse tests used to measure: i) the toxicity of Clostridium septicum toxin, ii) the absence of toxicity of C. septicum toxoid and iii) the antigenicity of C. septicum toxoid. The principal aims of the study were to determine the repeatability and reproducibility of the in vitro assays and to demonstrate concordance of the in vitro and current in vivo tests. The study results demonstrated good concordance, but the information gathered through the study (later on called Part 1) and the participants' workshop prompted the extension of the project in order to further optimise the in vitro protocols and improve their repeatability and reproducibility, which were comparable to but not better than those of the in vivo assays in Part 1. The 3 in vitro assays to be optimised in the extension of the BSP130 project were : i) the in vitro toxin neutralisation equivalence plus (TNE+), as a replacement for the in vivo minimum lethal dose (MLD) test for quantification of the toxicity of toxin; ii) the in vitro MLD, as a replacement for the in vivo MLD test for detection of residual toxicity associated with toxoid; iii) the in vitro total combining power (TCP), as a replacement for the in vivo TCP test for quantification of the antigenicity of toxoid. At this point, the Analytical Method Transfer Laboratory of Ceva-Phylaxia (Hungary), supported by the project management team, developed suitable SOPs for the 3 in vitro assays. These optimised methods were further assessed in BSP130 through a second international collaborative study (Part 2) aimed at defining repeatability and reproducibility in different laboratories and determining the levels of improvement compared with the original in vivo tests and the initial in vitro assays used in Part 1 of the project. Fourteen laboratories, comprising 4 public sector and 10 manufacturers' medicines control laboratories, from 11 countries participated in the collaborative Part 2 study, each testing 6 different C. septicum toxins and 6 C. septicum toxoids. Improved repeatability and reproducibility were observed for the optimised assays. The results of this study confirm the suitability of these assays for in-process control of C. septicum vaccines, with better repeatability and reproducibility than their in vivo equivalents. It is expected that, with appropriate minor changes and the use of relevant reagents, these optimised in vitro assays could be used not only for the assessment of C. septicum toxins and toxoids but for all cytotoxin-based clostridial antigens. The development and implementation of such in vitro assays would offer a great opportunity to significantly reduce animal usage, shorten the duration of QC test procedures and increase the precision of toxicity and antigenicity assays in clostridial veterinary vaccine in-process control. This would also provide more accurate and reproducible dosing of antigens in the final vaccine products, help to promote compendial acceptance and to proffer a basis for improved international harmonisation across this area of product testing.
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Affiliation(s)
- M-E Behr-Gross
- European Directorate for the Quality of Medicines & HealthCare, Department of Biological Standardisation, OMCL Network & Healthcare (DBO), Council of Europe, Strasbourg, France
| | - B Siklodi
- Ceva-Phylaxia, Veterinary Biologicals Co. Ltd, Hungary
| | - D Le Tallec
- European Directorate for the Quality of Medicines & HealthCare, Department of Biological Standardisation, OMCL Network & HealthCare (DBO), Council of Europe, Strasbourg, France
| | - M Halder
- European Commission, Joint Research Centre, Via E. Fermi, 2749, 21027 Ispra (VA), Italy
| | - I Manou
- European Partnership for Alternative Approaches to Animal Testing (EPAA), Brussels, Belgium
| | - N Sinitskaya
- European Directorate for the Quality of Medicines & HealthCare, Department of Biological Standardisation, OMCL Network & HealthCare (DBO), Council of Europe, Strasbourg, France
| | | | - B Dalmadi
- Ceva-Phylaxia, Veterinary Biologicals Co. Ltd, Hungary
| | - L Kiss
- Ceva-Phylaxia, Veterinary Biologicals Co. Ltd, Hungary
| | - K Redhead
- Vaccine & Assay Consultancy, Watford, WD25 0EX, United Kingdom
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Parisi V, Vassallo A, Pisano C, Signorino G, Cardile F, Sorrentino M, Colelli F, Fucci A, D’Andrea EL, De Tommasi N, Braca A, De Leo M. A Herbal Mixture from Propolis, Pomegranate, and Grape Pomace Endowed with Anti-Inflammatory Activity in an In Vivo Rheumatoid Arthritis Model. Molecules 2020; 25:molecules25092255. [PMID: 32403241 PMCID: PMC7248927 DOI: 10.3390/molecules25092255] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2020] [Revised: 04/30/2020] [Accepted: 05/04/2020] [Indexed: 11/27/2022] Open
Abstract
Rheumatoid arthritis (RA) is a chronic inflammatory autoimmune disease characterized by the production of inflammatory factors. In order to overcome the side effects of currently used anti-inflammatory drugs, several attempts have been made to identify natural products capable of relieving RA symptoms. In this work, a herbal preparation consisting of propolis, pomegranate peel, and Aglianico grape pomace (PPP) extracts (4:1:1) was designed and evaluated for its effect on a murine collagen-induced arthritis (CIA) model. Firstly, the chemical contents of four different Italian propolis collected in the Campania region (Italy) were here reported for the first time. LC-MS analyses showed the presence of 38 constituents, identified in all propolis extracts, belonging to flavonoids and phenolic acids classes. The Pietradefusi extract was the richest one and thus was selected to design the PPP preparation for the in vivo assay. Our results highlight the impact of PPP on RA onset and progression. By using in vivo CIA models, the treatment with PPP resulted in a delayed onset of the disease and alleviated the severity of the clinical symptoms. Furthermore, we demonstrated that early PPP treatment was associated with a reduction in serum levels of IL-17, IL-1b, and IL-17–triggering cytokines.
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Affiliation(s)
- Valentina Parisi
- Dipartimento di Farmacia, Università degli Studi di Salerno, 84084 Fisciano (SA), Italy;
- Università degli Studi di Salerno, Ph. D. School of Pharmacy, 84084 Fisciano (SA), Italy
| | - Antonio Vassallo
- Dipartimento di Scienze, Università della Basilicata, 85100 Potenza, Italy;
| | - Claudio Pisano
- Biogem, Research Institute “G. Salvatore”, 83031 Ariano Irpino (AV), Italy; (G.S.); (F.C.); (M.S.); (F.C.); (A.F.); (E.L.D.)
- Correspondence: (C.P.); (N.D.T.); Tel.: +39-334-6817269 (C.P.); +39-089-969754 (N.D.T.)
| | - Giacomo Signorino
- Biogem, Research Institute “G. Salvatore”, 83031 Ariano Irpino (AV), Italy; (G.S.); (F.C.); (M.S.); (F.C.); (A.F.); (E.L.D.)
| | - Francesco Cardile
- Biogem, Research Institute “G. Salvatore”, 83031 Ariano Irpino (AV), Italy; (G.S.); (F.C.); (M.S.); (F.C.); (A.F.); (E.L.D.)
| | - Milena Sorrentino
- Biogem, Research Institute “G. Salvatore”, 83031 Ariano Irpino (AV), Italy; (G.S.); (F.C.); (M.S.); (F.C.); (A.F.); (E.L.D.)
| | - Fabiana Colelli
- Biogem, Research Institute “G. Salvatore”, 83031 Ariano Irpino (AV), Italy; (G.S.); (F.C.); (M.S.); (F.C.); (A.F.); (E.L.D.)
| | - Alessandra Fucci
- Biogem, Research Institute “G. Salvatore”, 83031 Ariano Irpino (AV), Italy; (G.S.); (F.C.); (M.S.); (F.C.); (A.F.); (E.L.D.)
| | - Egildo Luca D’Andrea
- Biogem, Research Institute “G. Salvatore”, 83031 Ariano Irpino (AV), Italy; (G.S.); (F.C.); (M.S.); (F.C.); (A.F.); (E.L.D.)
| | - Nunziatina De Tommasi
- Dipartimento di Farmacia, Università degli Studi di Salerno, 84084 Fisciano (SA), Italy;
- Correspondence: (C.P.); (N.D.T.); Tel.: +39-334-6817269 (C.P.); +39-089-969754 (N.D.T.)
| | - Alessandra Braca
- Dipartimento di Farmacia, Università di Pisa, 56126 Pisa, Italy; (A.B.); (M.D.L.)
- Centro Interdipartimentale di Ricerca Nutraceutica e Alimentazione per la Salute “Nutrafood”, Università di Pisa, 56124 Pisa, Italy
| | - Marinella De Leo
- Dipartimento di Farmacia, Università di Pisa, 56126 Pisa, Italy; (A.B.); (M.D.L.)
- Centro Interdipartimentale di Ricerca Nutraceutica e Alimentazione per la Salute “Nutrafood”, Università di Pisa, 56124 Pisa, Italy
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Rabal O, Sánchez-Arias JA, Cuadrado-Tejedor M, de Miguel I, Pérez-González M, García-Barroso C, Ugarte A, Estella-Hermoso de Mendoza A, Sáez E, Espelosin M, Ursua S, Haizhong T, Wei W, Musheng X, Garcia-Osta A, Oyarzabal J. Discovery of in Vivo Chemical Probes for Treating Alzheimer's Disease: Dual Phosphodiesterase 5 (PDE5) and Class I Histone Deacetylase Selective Inhibitors. ACS Chem Neurosci 2019; 10:1765-1782. [PMID: 30525452 DOI: 10.1021/acschemneuro.8b00648] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
In order to determine the contributions of histone deacetylase (HDAC) isoforms to the beneficial effects of dual phosphodiesterase 5 (PDE5) and pan-HDAC inhibitors on in vivo models of Alzheimer's disease (AD), we have designed, synthesized, and tested novel chemical probes with the desired target compound profile of PDE5 and class I HDAC selective inhibitors. Compared to previous hydroxamate-based series, these molecules exhibit longer residence times on HDACs. In this scenario, shorter or longer preincubation times may have a significant impact on the IC50 values of these compounds and therefore on their corresponding selectivity profiles on the different HDAC isoforms. On the other hand, different chemical series have been explored and, as expected, some pairwise comparisons show a clear impact of the scaffold on biological responses (e.g., 35a vs 40a). The lead identification process led to compound 29a, which shows an adequate ADME-Tox profile and in vivo target engagement (histone acetylation and cAMP/cGMP response element-binding (CREB) phosphorylation) in the central nervous system (CNS), suggesting that this compound represents an optimized chemical probe; thus, 29a has been assayed in a mouse model of AD (Tg2576).
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Affiliation(s)
| | | | - Mar Cuadrado-Tejedor
- Anatomy Department, School of Medicine, University of Navarra, Irunlarrea 1, E-31008 Pamplona, Spain
| | | | | | | | | | | | | | | | | | - Tan Haizhong
- WuXi Apptec (Tianjin) Co. Ltd., TEDA, No. 111 HuangHai Road, Fourth Avenue, Tianjin 300456, PR China
| | - Wu Wei
- WuXi Apptec (Tianjin) Co. Ltd., TEDA, No. 111 HuangHai Road, Fourth Avenue, Tianjin 300456, PR China
| | - Xu Musheng
- WuXi Apptec (Tianjin) Co. Ltd., TEDA, No. 111 HuangHai Road, Fourth Avenue, Tianjin 300456, PR China
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Moon JS, Li L, Bang J, Han NS. Application of in vitro gut fermentation models to food components: A review. Food Sci Biotechnol 2016; 25:1-7. [PMID: 30263479 DOI: 10.1007/s10068-016-0091-x] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2015] [Revised: 03/01/2016] [Accepted: 03/02/2016] [Indexed: 12/18/2022] Open
Abstract
In vitro fermentation models have been developed for study of relationships between gut microbiota and food components. In vitro fermentation gut models involve use of pure cultures, mixed cultures, and human feces, and range from simple batch style fermentations performed in serum bottles to sophisticated pH-controlled multistage continuous culture systems. These models are increasingly used as an alternative to in vivo assays not only for disclosure of physiological activities of food components in the human intestine, but also for development of novel health functional foods. The purpose of this review is to introduce the present status and challenges of use of in vitro gut fermentation models in food studies.
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Affiliation(s)
- Jin Seok Moon
- Brain Korea 21 Center for Bio-Resource Development, Division of Animal, Horticultural, and Food Sciences, Chungbuk National University, Cheongju, Chungbuk, 28644 Korea
| | - Ling Li
- Brain Korea 21 Center for Bio-Resource Development, Division of Animal, Horticultural, and Food Sciences, Chungbuk National University, Cheongju, Chungbuk, 28644 Korea
| | - Jeongsu Bang
- Brain Korea 21 Center for Bio-Resource Development, Division of Animal, Horticultural, and Food Sciences, Chungbuk National University, Cheongju, Chungbuk, 28644 Korea
| | - Nam Soo Han
- Brain Korea 21 Center for Bio-Resource Development, Division of Animal, Horticultural, and Food Sciences, Chungbuk National University, Cheongju, Chungbuk, 28644 Korea
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Unterman S, Freiman A, Beckerman M, Abraham E, Stanley JR, Levy E, Artzi N, Edelman E. Tuning of collagen scaffold properties modulates embedded endothelial cell regulatory phenotype in repair of vascular injuries in vivo. Adv Healthc Mater 2015; 4:2220-8. [PMID: 26333178 PMCID: PMC4664078 DOI: 10.1002/adhm.201500457] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2015] [Revised: 07/31/2015] [Indexed: 01/08/2023]
Abstract
Perivascularly implanted matrix embedded endothelial cells (MEECs) are potent regulators of inflammation and intimal hyperplasia following vascular injuries. Endothelial cells (ECs) in collagen scaffolds adopt a reparative phenotype with significant therapeutic potential. Although the biology of MEECs is increasingly understood, tuning of scaffold properties to control cell-substrate interactions is less well-studied. It is hypothesized that modulating scaffold degradation would change EC phenotype. Scaffolds with differential degradation are prepared by cross-linking and predegradation. Vascular injury increases degradation and the presence of MEECs retards injury-mediated degradation. MEECs respond to differential scaffold properties with altered viability in vivo, suppressed smooth muscle cell (SMC) proliferation in vitro, and altered interleukin-6 and matrix metalloproteinase-9 expression. When implanted perivascularly to a murine carotid wire injury, tuned scaffolds change MEEC effects on vascular repair and inflammation. Live animal imaging enables real-time tracking of cell viability, inflammation, and scaffold degradation, affording an unprecedented understanding of interactions between cells, substrate, and tissue. MEEC-treated injuries improve endothelialization and reduce SMC hyperplasia over 14 d. These data demonstrate the potent role material design plays in tuning MEEC efficacy in vivo, with implications for the design of clinical therapies.
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Affiliation(s)
- Shimon Unterman
- Institute for Medical Engineering and Science, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Alina Freiman
- Institute for Medical Engineering and Science, Massachusetts Institute of Technology, Cambridge, MA 02139, USA. Ort Braude College, Karmiel, Israel
| | - Margarita Beckerman
- Institute for Medical Engineering and Science, Massachusetts Institute of Technology, Cambridge, MA 02139, USA. Ort Braude College, Karmiel, Israel
| | - Eytan Abraham
- Institute for Medical Engineering and Science, Massachusetts Institute of Technology, Cambridge, MA 02139, USA. Cardiovascular Division, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA 02115, USA
| | - James R.L. Stanley
- CBSET, Inc., Concord Biomedical Sciences and Emerging Technologies, Lexington, MA 02421, USA
| | - Ela Levy
- Institute for Medical Engineering and Science, Massachusetts Institute of Technology, Cambridge, MA 02139, USA. Ort Braude College, Karmiel, Israel
| | - Natalie Artzi
- Institute for Medical Engineering and Science, Massachusetts Institute of Technology, Cambridge, MA 02139, USA. Department of Anesthesiology, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA 02115, USA
| | - Elazer Edelman
- Institute for Medical Engineering and Science, Massachusetts Institute of Technology, Cambridge, MA 02139, USA. Cardiovascular Division, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA 02115, USA
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Komlev VS, Popov VK, Mironov AV, Fedotov AY, Teterina AY, Smirnov IV, Bozo IY, Rybko VA, Deev RV. 3D Printing of Octacalcium Phosphate Bone Substitutes. Front Bioeng Biotechnol 2015; 3:81. [PMID: 26106596 PMCID: PMC4459096 DOI: 10.3389/fbioe.2015.00081] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2015] [Accepted: 05/17/2015] [Indexed: 11/13/2022] Open
Abstract
Biocompatible calcium phosphate ceramic grafts are able of supporting new bone formation in appropriate environment. The major limitation of these materials usage for medical implants is the absence of accessible methods for their patient-specific fabrication. 3D printing methodology is an excellent approach to overcome the limitation supporting effective and fast fabrication of individual complex bone substitutes. Here, we proposed a relatively simple route for 3D printing of octacalcium phosphates (OCP) in complexly shaped structures by the combination of inkjet printing with post-treatment methodology. The printed OCP blocks were further implanted in the developed cranial bone defect followed by histological evaluation. The obtained result confirmed the potential of the developed OCP bone substitutes, which allowed 2.5-time reducing of defect's diameter at 6.5 months in a region where native bone repair is extremely inefficient.
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Affiliation(s)
- Vladimir S Komlev
- A.A. Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences , Moscow , Russia
| | - Vladimir K Popov
- Institute of Laser and Information Technologies, Russian Academy of Sciences , Moscow , Russia
| | - Anton V Mironov
- Institute of Laser and Information Technologies, Russian Academy of Sciences , Moscow , Russia
| | - Alexander Yu Fedotov
- A.A. Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences , Moscow , Russia
| | - Anastasia Yu Teterina
- A.A. Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences , Moscow , Russia
| | - Igor V Smirnov
- A.A. Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences , Moscow , Russia
| | - Ilya Y Bozo
- Human Stem Cells Institute , Moscow , Russia ; A.I. Evdokimov Moscow State University of Medicine and Dentistry , Moscow , Russia ; A.I. Burnazyan Federal Medical Biophysical Center of FMBA of Russia , Moscow , Russia
| | - Vera A Rybko
- Institute of Carcinogenesis, N.N. Blokhin Russian Cancer Research Center , Moscow , Russia
| | - Roman V Deev
- Human Stem Cells Institute , Moscow , Russia ; Kazan Federal University , Kazan , Russia
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11
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Liu H, Yang HL, Tang LH, Li XL, Huang F, Wang JZ, Li CF, Wang HY, Nie RH, Guo XR, Lin YX, Li M, Wang J, Xu JW. In vivo monitoring of dihydroartemisinin-piperaquine sensitivity in Plasmodium falciparum along the China-Myanmar border of Yunnan Province, China from 2007 to 2013. Malar J 2015; 14:47. [PMID: 25652213 PMCID: PMC4333884 DOI: 10.1186/s12936-015-0584-8] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2014] [Accepted: 01/25/2015] [Indexed: 12/23/2022] Open
Abstract
BACKGROUND Artemisinin-based combination therapy (ACT) is the recommended first-line treatment of falciparum malaria in all endemic countries. Artemisinin resistance in Plasmodium falciparum has been confirmed in the Greater Mekong subregion (GMS). Dihydroartemisinin-piperaquine (DAPQ) is the most commonly used ACT in China. To understand the DAPQ sensitivity of P. falciparum, DAPQ resistance was monitored in vivo along the China-Myanmar border from 2007 to 2013. METHODS Eligible patients with mono-infections of P. falciparum were recruited to this study after obtaining full informed consent. DAPQ tablets for different categories of kg body weight ranges were given once a day for three days. Patients were followed up for 42 days. Polymerase chain reaction (PCR) was conducted to distinguish between re-infection and recrudescence, to confirm the Plasmodium species. The data were entered and analysed by the Kaplan-Meier method. Treatment outcome was assessed according to the WHO recommended standards. RESULTS 243 patients were completed valid follow-up. The fever clearance time (FCT) and asexual parasite clearance times (APCT) were, respectively, 36.5 ± 10.9 and 43.5 ± 11.8 hours, and there was an increasing trend of both FCT (F = 268.41, P < 0.0001) and APCT (F = 88.6, P < 0.0001) from 2007 to 2013. Eight (3.3%, 95% confidence interval, 1.4-6.4%) patients present parasitaemia on day three after medication; however they were spontaneous cure on day four. 241 (99.2%; 95% CI, 97.1-99.9%) of the patients were adequate clinical and parasitological response (ACPR) and the proportions of ACPR had not changed significantly from 2007 to 2013 (X(2) = 2.81, P = 0.7288). CONCLUSION In terms of efficacy, DAPQ is still an effective treatment for falciparum malaria. DAPQ sensitivity in P. falciparum had not significantly changed along the China-Myanmar border of Yunnan Province, China. However more attentions should be given to becoming slower fever and parasite clearance.
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Affiliation(s)
- Hui Liu
- Yunnan Institute of Parasitic Diseases, Yunnan Provincial Center of Malaria Research, Yunnan Provincial Collaborative Innovation Center for Public Health and Disease Prevention and Control, Yunnan Provincial Key Laboratory of Vector-borne Diseases Control and Research, Puer, 665000, China.
| | - Heng-lin Yang
- Yunnan Institute of Parasitic Diseases, Yunnan Provincial Center of Malaria Research, Yunnan Provincial Collaborative Innovation Center for Public Health and Disease Prevention and Control, Yunnan Provincial Key Laboratory of Vector-borne Diseases Control and Research, Puer, 665000, China.
| | - Lin-hua Tang
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, Shanghai, 200025, PR China.
| | - Xing-liang Li
- Yunnan Institute of Parasitic Diseases, Yunnan Provincial Center of Malaria Research, Yunnan Provincial Collaborative Innovation Center for Public Health and Disease Prevention and Control, Yunnan Provincial Key Laboratory of Vector-borne Diseases Control and Research, Puer, 665000, China.
| | - Fang Huang
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, Shanghai, 200025, PR China.
| | - Jia-zhi Wang
- Tengchong County Center for Disease Control and Prevention, Tengchong, 679100, China.
| | - Chun-fu Li
- Yunnan Institute of Parasitic Diseases, Yunnan Provincial Center of Malaria Research, Yunnan Provincial Collaborative Innovation Center for Public Health and Disease Prevention and Control, Yunnan Provincial Key Laboratory of Vector-borne Diseases Control and Research, Puer, 665000, China.
| | - Heng-ye Wang
- Yunnan Institute of Parasitic Diseases, Yunnan Provincial Center of Malaria Research, Yunnan Provincial Collaborative Innovation Center for Public Health and Disease Prevention and Control, Yunnan Provincial Key Laboratory of Vector-borne Diseases Control and Research, Puer, 665000, China.
| | - Ren-hua Nie
- Yunnan Institute of Parasitic Diseases, Yunnan Provincial Center of Malaria Research, Yunnan Provincial Collaborative Innovation Center for Public Health and Disease Prevention and Control, Yunnan Provincial Key Laboratory of Vector-borne Diseases Control and Research, Puer, 665000, China.
| | - Xiang-rui Guo
- Yangjiang County Center for Disease Control and Prevention, Yingjiang, 679300, China.
| | - Ying-xue Lin
- Yangjiang County Center for Disease Control and Prevention, Yingjiang, 679300, China.
| | - Mei Li
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, Shanghai, 200025, PR China.
| | - Jian Wang
- Yunnan Institute of Parasitic Diseases, Yunnan Provincial Center of Malaria Research, Yunnan Provincial Collaborative Innovation Center for Public Health and Disease Prevention and Control, Yunnan Provincial Key Laboratory of Vector-borne Diseases Control and Research, Puer, 665000, China.
| | - Jian-wei Xu
- Yunnan Institute of Parasitic Diseases, Yunnan Provincial Center of Malaria Research, Yunnan Provincial Collaborative Innovation Center for Public Health and Disease Prevention and Control, Yunnan Provincial Key Laboratory of Vector-borne Diseases Control and Research, Puer, 665000, China.
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12
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Schmitt M, Allena R, Schouman T, Frasca S, Collombet JM, Holy X, Rouch P. Diffusion model to describe osteogenesis within a porous titanium scaffold. Comput Methods Biomech Biomed Engin 2015; 19:171-9. [PMID: 25573031 DOI: 10.1080/10255842.2014.998207] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
In this study, we develop a two-dimensional finite element model, which is derived from an animal experiment and allows simulating osteogenesis within a porous titanium scaffold implanted in ewe's hemi-mandible during 12 weeks. The cell activity is described through diffusion equations and regulated by the stress state of the structure. We compare our model to (i) histological observations and (ii) experimental data obtained from a mechanical test done on sacrificed animal. We show that our mechano-biological approach provides consistent numerical results and constitutes a useful tool to predict osteogenesis pattern.
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Affiliation(s)
- M Schmitt
- a Arts et Métiers ParisTech, LBM , 151 bd de l'hôpital, 75013 Paris , France
| | - R Allena
- a Arts et Métiers ParisTech, LBM , 151 bd de l'hôpital, 75013 Paris , France
| | - T Schouman
- a Arts et Métiers ParisTech, LBM , 151 bd de l'hôpital, 75013 Paris , France.,b Department of maxillofacial surgery , APHP - Pitie-Salpetriere University Hospital , University of Paris 6, 75013 Paris , France
| | - S Frasca
- c Institut de recherche biomédicale des armées , 91223 Brétigny sur Orge , France
| | - J M Collombet
- c Institut de recherche biomédicale des armées , 91223 Brétigny sur Orge , France
| | - X Holy
- c Institut de recherche biomédicale des armées , 91223 Brétigny sur Orge , France
| | - P Rouch
- a Arts et Métiers ParisTech, LBM , 151 bd de l'hôpital, 75013 Paris , France
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13
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Bellas E, Rollins A, Moreau JE, Lo T, Quinn KP, Fourligas N, Georgakoudi I, Leisk GG, Mazan M, Thane KE, Taeymans O, Hoffman AM, Kaplan DL, Kirker-Head CA. Equine model for soft-tissue regeneration. J Biomed Mater Res B Appl Biomater 2014; 103:1217-1227. [PMID: 25350377 DOI: 10.1002/jbm.b.33299] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2014] [Revised: 08/26/2014] [Accepted: 10/01/2014] [Indexed: 11/10/2022]
Abstract
Soft-tissue regeneration methods currently yield suboptimal clinical outcomes due to loss of tissue volume and a lack of functional tissue regeneration. Grafted tissues and natural biomaterials often degrade or resorb too quickly, while most synthetic materials do not degrade. In previous research we demonstrated that soft-tissue regeneration can be supported using silk porous biomaterials for at least 18 months in vivo in a rodent model. In the present study, we scaled the system to a survival study using a large animal model and demonstrated the feasibility of these biomaterials for soft-tissue regeneration in adult horses. Both slow and rapidly degrading silk matrices were evaluated in subcutaneous pocket and intramuscular defect depots. We showed that we can effectively employ an equine model over 6 months to simultaneously evaluate many different implants, reducing the number of animals needed. Furthermore, we were able to tailor matrix degradation by varying the initial format of the implanted silk. Finally, we demonstrate ultrasound imaging of implants to be an effective means for tracking tissue regeneration and implant degradation.
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Affiliation(s)
- E Bellas
- Department of Biomedical Engineering, Tufts University, Medford, MA
| | - A Rollins
- Cummings School of Veterinary Medicine, Tufts University, North Grafton, MA
| | - J E Moreau
- Department of Biomedical Engineering, Tufts University, Medford, MA
| | - T Lo
- Department of Mechanical Engineering, Tufts University, Medford, MA
| | - K P Quinn
- Department of Biomedical Engineering, Tufts University, Medford, MA
| | - N Fourligas
- Department of Biomedical Engineering, Tufts University, Medford, MA
| | - I Georgakoudi
- Department of Biomedical Engineering, Tufts University, Medford, MA
| | - G G Leisk
- Department of Mechanical Engineering, Tufts University, Medford, MA
| | - M Mazan
- Cummings School of Veterinary Medicine, Tufts University, North Grafton, MA
| | - K E Thane
- Cummings School of Veterinary Medicine, Tufts University, North Grafton, MA
| | - O Taeymans
- Cummings School of Veterinary Medicine, Tufts University, North Grafton, MA
| | - A M Hoffman
- Cummings School of Veterinary Medicine, Tufts University, North Grafton, MA
| | - D L Kaplan
- Department of Biomedical Engineering, Tufts University, Medford, MA
| | - C A Kirker-Head
- Cummings School of Veterinary Medicine, Tufts University, North Grafton, MA
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Xu N, Ye X, Wei D, Zhong J, Chen Y, Xu G, He D. 3D artificial bones for bone repair prepared by computed tomography-guided fused deposition modeling for bone repair. ACS Appl Mater Interfaces 2014; 6:14952-14963. [PMID: 25133309 DOI: 10.1021/am502716t] [Citation(s) in RCA: 106] [Impact Index Per Article: 10.6] [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: 06/03/2023]
Abstract
The medical community has expressed significant interest in the development of new types of artificial bones that mimic natural bones. In this study, computed tomography (CT)-guided fused deposition modeling (FDM) was employed to fabricate polycaprolactone (PCL)/hydroxyapatite (HA) and PCL 3D artificial bones to mimic natural goat femurs. The in vitro mechanical properties, in vitro cell biocompatibility, and in vivo performance of the artificial bones in a long load-bearing goat femur bone segmental defect model were studied. All of the results indicate that CT-guided FDM is a simple, convenient, relatively low-cost method that is suitable for fabricating natural bonelike artificial bones. Moreover, PCL/HA 3D artificial bones prepared by CT-guided FDM have more close mechanics to natural bone, good in vitro cell biocompatibility, biodegradation ability, and appropriate in vivo new bone formation ability. Therefore, PCL/HA 3D artificial bones could be potentially be of use in the treatment of patients with clinical bone defects.
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Affiliation(s)
- Ning Xu
- Department of Orthopedic Surgery, Changzheng Hospital, Second Military Medical University , Shanghai 200003, People's Republic of China
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15
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Chiriac AP, Nita LE, Tartau L, Neamtu I, Nistor MT. Semi-imprinting quercetin into poly[N,N-dimethylacrylamide-co-3, 9-divinyl-2, 4, 8, 10-tetraoxaspiro (5.5) undecane] network: evaluation of the antioxidant character. J Pharm Sci 2014; 103:2338-46. [PMID: 24916717 DOI: 10.1002/jps.24049] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2014] [Revised: 05/19/2014] [Accepted: 05/20/2014] [Indexed: 11/09/2022]
Abstract
A responsive antioxidant system constituted from quercetin inserted into poly[N,N-dimethylacrylamide-co-3, 9-divinyl-2, 4, 8, 10-tetraoxaspiro (5.5) undecane] through a semi-imprinted procedure was evaluated. A continuous magnetic field (MF) was used during supramolecular structure preparation. The strength of coupling quercetin was evaluated based on the template release from the polymeric matrices, as well as to what extent quercetin reloaded into the polymer matrix in prescribed conditions--with or without the MF presence--shows antioxidant properties. The antioxidant activity of the complex was investigated by radical inhibitor activity method using 2, 2-diphenyl-l-picrylhydrazyl. The evaluation of the homogeneity distribution of the quercetin inside the polymeric network was made by near-infrared chemical imaging and correspondingly statistical analysis. For in vivo biocompatibility investigation, granuloma test in rats was performed correlated with the activity of enzymes involved in oxidative stress as well as immunologic effects of tested supramolecular complexes that include quercetin as therapeutic agent.
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Affiliation(s)
- Aurica P Chiriac
- "Petru Poni" Institute of Macromolecular Chemistry, Iasi, 700487, Romania
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16
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Lee JS, Lee SK, Kim BS, Im GI, Cho KS, Kim CS. Controlled release of BMP-2 using a heparin-conjugated carrier system reduces in vivo adipose tissue formation. J Biomed Mater Res A 2014; 103:545-54. [PMID: 24764177 DOI: 10.1002/jbm.a.35207] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2013] [Revised: 04/12/2014] [Accepted: 04/22/2014] [Indexed: 11/10/2022]
Abstract
There is growing concern about unwanted effects associated with the clinical use of recombinant human bone morphogenetic protein-2 (rhBMP-2) at high concentrations, including cyst-like bone formation and excessive fatty marrow formation. We, therefore, evaluated the induction of mineralized/adipose tissue formation and the bone-healing pattern associated with the controlled release of E. coli-derived rhBMP-2 (ErhBMP-2) by a heparin-conjugated fibrin (HCF) system using ectopic and orthotopic in vivo models, respectively. In the ectopic transplantation model, mineralized tissue formed at the most superficial layer of the transplanted area and on the surfaces of grafted materials, and most of the interstitial space within the transplanted area was filled with excessive adipose tissue specifically at sites that received ErhBMP-2. However, sites that received ErhBMP-2 and HCF showed significantly increased mineralized tissue formation and decreased adipose tissue formation compared to the normal fibrin system with ErhBMP-2. In the orthotopic (calvarial defect) model, controlled release of ErhBMP-2 induced by HCF significantly reduced adipose tissue formation within the defect area compared to the clinically approved absorbable collagen sponge. From these results, it can be concluded that the use of a HCF system loaded with ErhBMP-2 may reduce adipose tissue formation and enhance mineralized tissue formation.
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Affiliation(s)
- Jung-Seok Lee
- Department of Periodontology, Research Institute for Periodontal Regeneration, College of Dentistry, Yonsei University, Seoul, 120-752, Republic of Korea
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17
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Ge X, Zhang Q, Cai Y, Duan S, Chen S, Lv N, Jin T, Chen Y, Yuan W. PEG-PCL-DEX polymersome-protamine vector as an efficient gene delivery system via PEG-guided self-assembly. Nanomedicine (Lond) 2013; 9:1193-207. [PMID: 24294982 DOI: 10.2217/nnm.13.83] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
AIM The nonviral carrier system based on the triblock copolymer PEG-PCL-DEX (PPD) and protamine was developed for nucleic acid delivery. MATERIALS & METHODS Self-assembly occurred in the PEG continuous phase to form 'dextran-interior' polymersomes. siRNA can be condensed by protamine and encapsulated into PPD polymersomes in order to form the PPD-protamine siRNA nanoparticles by thermodynamically preferential partition between the PEG continuous phase and the dextran cavity. RESULTS This system can package siRNA into PPD polymersomes to form 145.2 ± 8.02-nm (± standard deviation) nanoparticles, and the ζ-potential can be reduced to approximately 0 mV. PPD-protamine siRNA nanoparticles achieved cellular uptake of siRNA in SMMC-7721 cells with negligible cytotoxicity, and the GL3 gene expression can be reduced to 61.73 ± 6.25%. A biodistribution study of nanoparticles suggested that the PPD-protamine siRNA nanoparticles mainly accumulated in liver. CONCLUSION All of these results suggest that PPD-protamine carriers may offer a promising gene delivery strategy for the treatment of liver-related disease.
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Affiliation(s)
- Xuemei Ge
- School of Pharmacy, Shanghai Jiao Tong University, No. 800, Dongchuan Road, Shanghai 200240, China
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18
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Cha JK, Lee JS, Kim MS, Choi SH, Cho KS, Jung UW. Sinus augmentation using BMP-2 in a bovine hydroxyapatite/collagen carrier in dogs. J Clin Periodontol 2013; 41:86-93. [PMID: 24117528 DOI: 10.1111/jcpe.12174] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/26/2013] [Indexed: 12/21/2022]
Abstract
AIM The objective of this study was to determine the efficacy of bone morphogenetic protein 2 (BMP-2) in a bovine hydroxyapatite/collagen (BHC) carrier to augment bone formation in a canine nasal sinus model. METHODS Eight mongrel dogs, approximately 12 months old and 30 kg in weight were used. Following preparation of bilateral sinus access windows, BHC alone (control) or loaded with E. coli-derived BMP-2 at 0.1 mg/ml was implanted in four animals, and BHC loaded with E. coli-derived BMP-2 at 0.5 and 1.5 mg/ml was implanted in four animals. The animals were euthanized at 20 weeks when block sections were obtained for micro-computed tomography and histometric analyses. RESULTS Total augmented volumes did not differ significantly between groups. Histometric analysis showed significantly enhanced bone formation for the BMP-2 groups compared with control. CONCLUSION BMP-2 in a BHC carrier, even at the low 0.1-mg/ml concentration, induces osteogenic activity, enhancing local bone formation in a canine sinus model.
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Affiliation(s)
- Jae-Kook Cha
- Department of Periodontology, Research Institute for Periodontal Regeneration, College of Dentistry, Yonsei University, Seoul 120-752, Republic of Korea
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Boix D, Weiss P, Gauthier O, Guicheux J, Bouler JM, Pilet P, Daculsi G, Grimandi G. Injectable bone substitute to preserve alveolar ridge resorption after tooth extraction: a study in dog. J Mater Sci Mater Med 2006; 17:1145-52. [PMID: 17122930 PMCID: PMC2042990 DOI: 10.1007/s10856-006-0542-7] [Citation(s) in RCA: 19] [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: 02/08/2005] [Accepted: 03/01/2006] [Indexed: 05/12/2023]
Abstract
The aim of the present study was to assess the efficacy of a ready-to-use injectable bone substitute on the prevention of alveolar ridge resorption after tooth extraction. Maxillary and mandibular premolars were extracted from 3 Beagle dogs with preservation of alveolar bone. Thereafter, distal sockets were filled with an injectable bone substitute (IBS), obtained by combining a polymer solution and granules of a biphasic calcium phosphate (BCP) ceramic. As a control, the mesial sockets were left unfilled. After a 3 months healing period, specimens were removed and prepared for histomorphometric evaluation with image analysis. Histomorphometric study allowed to measure the mean and the maximal heights of alveolar crest modifications. Results always showed an alveolar bone resorption in unfilled sockets. Resorption in filled maxillary sites was significantly lower than in control sites. Interestingly, an alveolar ridge augmentation was measured in mandibular filled sockets including 30% of newly-formed bone. It was concluded that an injectable bone substitute composed of a polymeric carrier and calcium phosphate can significantly increase alveolar ridge preservation after tooth extraction.
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Affiliation(s)
- Damien Boix
- Matériaux d'intérêt biologique
INSERM : EPI9903Université de NantesFaculté de chirurgie dentaire
1 place Alexis Ricordeau BP84215
44042 Nantes,FR
| | - Pierre Weiss
- Matériaux d'intérêt biologique
INSERM : EPI9903Université de NantesFaculté de chirurgie dentaire
1 place Alexis Ricordeau BP84215
44042 Nantes,FR
| | - Olivier Gauthier
- Matériaux d'intérêt biologique
INSERM : EPI9903Université de NantesFaculté de chirurgie dentaire
1 place Alexis Ricordeau BP84215
44042 Nantes,FR
- Département de chirurgie
Ecole Nationale Vétérinaire de Nantes44307 Nantes,FR
| | - Jérôme Guicheux
- Matériaux d'intérêt biologique
INSERM : EPI9903Université de NantesFaculté de chirurgie dentaire
1 place Alexis Ricordeau BP84215
44042 Nantes,FR
| | - Jean-Michel Bouler
- Matériaux d'intérêt biologique
INSERM : EPI9903Université de NantesFaculté de chirurgie dentaire
1 place Alexis Ricordeau BP84215
44042 Nantes,FR
| | - Paul Pilet
- Centre de microscopie électronique
CHU NantesUniversité de Nantes1 place Alexis Ricordeau
44042 Nantes,FR
| | - Guy Daculsi
- Matériaux d'intérêt biologique
INSERM : EPI9903Université de NantesFaculté de chirurgie dentaire
1 place Alexis Ricordeau BP84215
44042 Nantes,FR
| | - Gaël Grimandi
- Matériaux d'intérêt biologique
INSERM : EPI9903Université de NantesFaculté de chirurgie dentaire
1 place Alexis Ricordeau BP84215
44042 Nantes,FR
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Ensing G, Roeder B, Nelson J, van Horn J, van der Mei H, Busscher H, Pitt W. Effect of pulsed ultrasound in combination with gentamicin on bacterial viability in biofilms on bone cements in vivo. J Appl Microbiol 2005; 99:443-8. [PMID: 16108785 PMCID: PMC2547121 DOI: 10.1111/j.1365-2672.2005.02643.x] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
AIMS The aim of this study is to investigate whether pulsed ultrasound (US) in combination with gentamicin yields a decreased viability of bacteria in biofilms on bone cements in vivo. METHODS AND RESULTS Bacterial survival on bone cement in the presence and absence of ultrasound was compared in a rabbit model. Two bone cement samples with an Escherichia coli ATCC 10798 biofilm were implanted in a total of nine rabbits. In two groups bone cement discs loaded with gentamicin, freshly prepared and aged were used, and in one group unloaded bone cement discs in combination with systemically administered gentamicin. Pulsed ultrasound with a frequency of 28.48 kHz and a maximum acoustic intensity of 500 mW cm(-2) was applied continuously from 24 h till 72 h postsurgery on one of the two implanted discs. After euthanization and removal of the bacteria from the discs, the number of viable bacteria were quantified and skin samples were analysed for histopathological examination. Application of ultrasound, combined with gentamicin, reduced the viability of the biofilms in all three groups varying between 58 and 69% compared with the negative control. Histopathological examinations showed no skin lesions. CONCLUSIONS Ultrasound resulted in a tendency of improved efficacy of gentamicin, either applied locally or systemically. Usage of ultrasound in this model proved to be safe. SIGNIFICANCE AND IMPACT OF THE STUDY This study implies that ultrasound could improve the prevention of infection immediately after surgery, especially because the biomaterials, gentamicin and ultrasound used in this model are all in clinical usage, but not yet combined in clinical practice.
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Affiliation(s)
- G.T. Ensing
- Department of Biomedical Engineering, University of Groningen, A. Deusinglaan 1, 9713 AV, Groningen, The Netherlands
| | - B.L. Roeder
- Department of Integrative Biology, 350 Clyde Bldg., Brigham Young University, Provo, UT 84602, U.S.A
| | - J.L. Nelson
- Department of Chemical Engineering Brigham Young University, 350 Clyde Bldg., Brigham Young University, Provo, UT 84602, U.S.A
| | - J.R. van Horn
- Department of Orthopaedic Surgery, University Hospital Groningen, P.O. Box 30.001 Hanzeplein 1, 9713 GZ, Groningen, The Netherlands
| | - H.C. van der Mei
- Department of Biomedical Engineering, University of Groningen, A. Deusinglaan 1, 9713 AV, Groningen, The Netherlands
| | - H.J. Busscher
- Department of Biomedical Engineering, University of Groningen, A. Deusinglaan 1, 9713 AV, Groningen, The Netherlands
| | - W.G. Pitt
- Department of Chemical Engineering Brigham Young University, 350 Clyde Bldg., Brigham Young University, Provo, UT 84602, U.S.A
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