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Salerno A, Palladino A, Pizzoleo C, Attanasio C, Netti PA. Computer-aided patterning of PCL microspheres to build modular scaffolds featuring improved strength and neovascularized tissue integration. Biofabrication 2022; 14. [PMID: 35728565 DOI: 10.1088/1758-5090/ac7ad8] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2021] [Accepted: 06/21/2022] [Indexed: 11/11/2022]
Abstract
In the past decade, modular scaffolds prepared by assembling biocompatible and biodegradable building blocks (e.g. microspheres) have found promising applications in tissue engineering (TE) towards the repair/regeneration of damaged and impaired tissues. Nevertheless, to date this approach has failed to be transferred to the clinic due to technological limitations regarding microspheres patterning, a crucial issue for the control of scaffold strength, vascularization and integration in vivo. In this work, we propose a robust and reliable approach to address this issue through the fabrication of polycaprolactone (PCL) microsphere-based scaffolds with in-silico designed microarchitectures and high compression moduli. The scaffold fabrication technique consists of four main steps, starting with the manufacture of uniform PCL microspheres by fluidic emulsion technique. In the second step, patterned polydimethylsiloxane (PDMS) moulds were prepared by soft lithography. Then, layers of 500 µm PCL microspheres with geometrically inspired patterns were obtained by casting the microspheres onto PDMS moulds followed by their thermal sintering. Finally, three-dimensional porous scaffolds were built by the alignment, stacking and sintering of multiple (up to six) layers. The so prepared scaffolds showed excellent morphological and microstructural fidelity with respect to the in-silico models, and mechanical compression properties suitable for load bearing TE applications. Designed porosity and pore size features enabled in vitro human endothelial cells adhesion and growth as well as tissue integration and blood vessels invasion in vivo. Our results highlighted the strong impact of spatial patterning of microspheres on modular scaffolds response, and pay the way about the possibility to fabricate in silico-designed structures featuring biomimetic composition and architectures for specific TE purposes.
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Affiliation(s)
- Aurelio Salerno
- Italian Institute of Technology Center for Advanced Biomaterials for Healthcare, Largo Barsanti e Matteucci, 53, Napoli, 80125, ITALY
| | - Antonio Palladino
- University of Naples Federico II, via Federico Delpino, 1, Napoli, Campania, 80137, ITALY
| | - Carmela Pizzoleo
- Italian Institute of Technology Center for Advanced Biomaterials for Healthcare, Largo Barsanti e Matteucci 53, Napoli, 80125, ITALY
| | - Chiara Attanasio
- University of Naples Federico II, via Federico Delpino, 1, Napoli, Campania, 80137, ITALY
| | - Paolo Antonio Netti
- University of Naples Federico II Faculty of Engineering, Piazz.le Tecchio, Napoli, Campania, 80138, ITALY
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Zemła J, Iyer PS, Pyka-Fościak G, Mermod N, Lekka M. Rheological properties of skeletal muscles in a Duchenne muscular dystrophy murine model before and after autologous cell therapy. J Biomech 2021; 128:110770. [PMID: 34628203 DOI: 10.1016/j.jbiomech.2021.110770] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Revised: 08/30/2021] [Accepted: 09/22/2021] [Indexed: 12/25/2022]
Abstract
Duchenne muscular dystrophy (DMD) is still an incurable muscle degenerative disease; thus, numerous studies focused on novel therapeutic approaches. However, a simple assay of muscle function restoration remains needed. Herein, we used an oscillatory shear rheometer to evaluate changes in rheological properties of mouse muscles (tibialis anterior, TA) and their restoration upon autologous cell therapy by comparing the viscoelastic properties of normal, diseased and treated muscles. Amplitude sweep tests of muscle samples were performed under 20% compression over a range of shear strain between 0.01 and 2% and frequency of 1 rad/s. The samples were tested in plane-plane geometry and horizontal myofiber alignment. Typical linear viscoelastic region (LVER) patterns were found for each muscle type. For healthy muscles, a broad LVER between shear deformations (γ) of 0.013-0.62% was observed. The LVER of DMD mdx/SCID muscles was found at 0.14% to 0.46% shear deformation, and no shear dependence of storage (G') and loss (G") moduli at γ range changing from 0.034% to 0.26% was found for transplanted tissues. G'LVER and G"LVER moduli of healthy muscles were significantly higher than G'LVER and G"LVER of dystrophic tissues. Additionally, muscle resistance assessment by rheometer indicated that muscles transplanted with stem cells restored elastic properties to levels close to those of healthy muscles. Interestingly, histological staining and rheological data indicate that the loss factor is strongly related to structural changes of examined muscles.
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Affiliation(s)
- Joanna Zemła
- Institute of Nuclear Physics Polish Academy of Sciences, PL-31342 Krakow, Poland.
| | - Pavithra S Iyer
- Institute of Biotechnology and Department of Fundamental Microbiology, University of Lausanne, Lausanne, Switzerland
| | - Grażyna Pyka-Fościak
- Department of Histology, Jagiellonian University Medical College, Kopernika 7, 31-034 Krakow, Poland
| | - Nicolas Mermod
- Institute of Biotechnology and Department of Fundamental Microbiology, University of Lausanne, Lausanne, Switzerland
| | - Małgorzata Lekka
- Institute of Nuclear Physics Polish Academy of Sciences, PL-31342 Krakow, Poland
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Zhang H, Yang S, Yang Z, Wang D, Han J, Li C, Zhu C, Xu J, Zhao N. An Extremely Stretchable and Self-Healable Supramolecular Polymer Network. ACS APPLIED MATERIALS & INTERFACES 2021; 13:4499-4507. [PMID: 33433191 DOI: 10.1021/acsami.0c19560] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The construction of a single polymer network with extreme stretchability, relatively high mechanical strength, and fast and facile autonomous room-temperature self-healing capability still remains a challenge. Herein, supramolecular polymer networks are fabricated by synergistically incorporating metal-ligand and hydrogen bonds in poly(propylene glycol) (PPG). The representative specimen, PPG-Im-MDA-1.5-0.25-Cu, shows a combination of notable mechanical properties involving an extreme stretching ratio of 346 ± 14× and a Young's modulus of 2.10 ± 0.14 MPa, which are superior to the previously reported extremely stretchable polymeric materials. Notably, the destroyed specimen can fully recover mechanical performances within 1 h. The tunability of mechanical properties and self-healing capability has been actualized by merely tailoring the content of a chain extender. The application of the as-prepared supramolecular PPG network in constructing a flexible and self-healable conductor has been demonstrated. This strategy provides some insights for preparing extremely stretchable and self-healable polymeric materials.
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Affiliation(s)
- Huan Zhang
- Beijing National Laboratory for Molecular Sciences, CAS Research/Education Center for Excellence in Molecular Sciences, Laboratory of Polymer Physics and Chemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen 518060, China
| | - Shijia Yang
- Beijing National Laboratory for Molecular Sciences, CAS Research/Education Center for Excellence in Molecular Sciences, Laboratory of Polymer Physics and Chemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Zhusheng Yang
- Beijing National Laboratory for Molecular Sciences, CAS Research/Education Center for Excellence in Molecular Sciences, Laboratory of Polymer Physics and Chemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen 518060, China
| | - Dong Wang
- Beijing National Laboratory for Molecular Sciences, CAS Research/Education Center for Excellence in Molecular Sciences, Laboratory of Polymer Physics and Chemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Juanjuan Han
- Center for Physicochemical Analysis and Measurement, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Cuihua Li
- College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen 518060, China
| | - Caizhen Zhu
- College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen 518060, China
| | - Jian Xu
- Beijing National Laboratory for Molecular Sciences, CAS Research/Education Center for Excellence in Molecular Sciences, Laboratory of Polymer Physics and Chemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen 518060, China
| | - Ning Zhao
- Beijing National Laboratory for Molecular Sciences, CAS Research/Education Center for Excellence in Molecular Sciences, Laboratory of Polymer Physics and Chemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
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Ponjavic M, Nikolic MS, Stevanovic S, Nikodinovic-Runic J, Jeremic S, Pavic A, Djonlagic J. Hydrolytic degradation of star-shaped poly(ε-caprolactone)s with different number of arms and their cytotoxic effects. J BIOACT COMPAT POL 2020. [DOI: 10.1177/0883911520951826] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Star-shaped polymers of biodegradable aliphatic polyester, poly( ε-caprolactone), PCL, with different number of arms (three, four, and six) were synthesized by ring-opening polymerization initiated by multifunctional alcohols used as cores. As potential biomaterials, synthesized star-shaped poly( ε-caprolactone)s, sPCL, were thoroughly characterized in terms of their degradation under different pH conditions and in respect to their cytotoxicity. The in vitro degradation was performed in phosphate buffer (pH 7.4) and hydrochloric acid solution (pH 1.0) over 5 weeks. Degradation of sPCL films was followed by the weight loss measurements, GPC, FTIR, and AFM analysis. While the most of the samples were stable against the abiotic hydrolysis at pH 7.4 after 5 weeks of degradation, degradation was significantly accelerated in the acidic medium. Degradation rate of polymer films was affected by the polymer architecture and molecular weight. The molecular weight profiles during the degradation revealed random chain scission of the ester bonds indicating bulk degradation mechanism of hydrolysis at pH 7.4, while acidic hydrolysis proceeded through the bulk degradation associated with surface erosion, confirmed by AFM. The in vitro toxicity tests, cytotoxicity applying normal human fibroblasts (MRC5) and embryotoxicity assessment (using zebra fish model, Danio rerio), suggested those polymeric materials as suitable for biomedical application.
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Affiliation(s)
- Marijana Ponjavic
- Faculty of Technology and Metallurgy, University of Belgrade, Belgrade, Serbia
| | - Marija S Nikolic
- Faculty of Technology and Metallurgy, University of Belgrade, Belgrade, Serbia
| | - Sanja Stevanovic
- Institute of Chemistry, Technology and Metallurgy, University of Belgrade, Belgrade, Serbia
| | | | - Sanja Jeremic
- Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Belgrade, Serbia
| | - Aleksandar Pavic
- Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Belgrade, Serbia
| | - Jasna Djonlagic
- Faculty of Technology and Metallurgy, University of Belgrade, Belgrade, Serbia
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Salerno A, Domingo C. Polycaprolactone foams prepared by supercritical CO2 batch foaming of polymer/organic solvent solutions. J Supercrit Fluids 2019. [DOI: 10.1016/j.supflu.2018.08.006] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Kurkcuoglu SS, Kurkcuoglu O, Güner FS. A multiscale investigation on controlling bovine serum albumin adsorption onto polyurethane films. J Appl Polym Sci 2017. [DOI: 10.1002/app.45669] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Selin Sofi Kurkcuoglu
- Program of Polymer Science and Technology; Istanbul Technical University; Maslak Istanbul 34469 Turkey
| | - Ozge Kurkcuoglu
- Department of Chemical Engineering; Istanbul Technical University; Maslak Istanbul 34469 Turkey
| | - F. Seniha Güner
- Department of Chemical Engineering; Istanbul Technical University; Maslak Istanbul 34469 Turkey
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Ponjavic M, Nikolic MS, Jevtic S, Rogan J, Stevanovic S, Djonlagic J. Influence of a low content of PEO segment on the thermal, surface and morphological properties of triblock and diblock PCL copolymers. Macromol Res 2016. [DOI: 10.1007/s13233-016-4048-y] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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Dragostin OM, Samal SK, Lupascu F, Pânzariu A, Dubruel P, Lupascu D, Tuchilus C, Vasile C, Profire L. Development and Characterization of Novel Films Based on Sulfonamide-Chitosan Derivatives for Potential Wound Dressing. Int J Mol Sci 2015; 16:29843-55. [PMID: 26694354 PMCID: PMC4691147 DOI: 10.3390/ijms161226204] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2015] [Revised: 12/01/2015] [Accepted: 12/02/2015] [Indexed: 11/16/2022] Open
Abstract
The objective of this study was to develop new films based on chitosan functionalized with sulfonamide drugs (sulfametoxydiazine, sulfadiazine, sulfadimetho-xine, sulfamethoxazol, sulfamerazine, sulfizoxazol) in order to enhance the biological effects of chitosan. The morphology and physical properties of functionalized chitosan films as well the antioxidant effects of sulfonamide-chitosan derivatives were investigated. The chitosan-derivative films showed a rough surface and hydrophilic properties, which are very important features for their use as a wound dressing. The film based on chitosan-sulfisoxazol (CS-S6) showed the highest swelling ratio (197%) and the highest biodegradation rate (63.04%) in comparison to chitosan film for which the swelling ratio was 190% and biodegradation rate was only 10%. Referring to the antioxidant effects the most active was chitosan-sulfamerazine (CS-S5) which was 8.3 times more active than chitosan related to DPPH (1,1-diphenyl-2-picrylhydrazyl) radical scavenging ability. This compound showed also a good ferric reducing power and improved total antioxidant capacity.
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Affiliation(s)
- Oana Maria Dragostin
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, "Grigore T. Popa" University of Medicine and Pharmacy Iasi, 16 University Street, Iasi 700115, Romania.
| | - Sangram Keshari Samal
- Laboratory of General Biochemistry and Physical Pharmacy, Centre for Nano- and Biophotonics, Ghent University, Ottergemsesteenweg 460, Ghent 9000, Belgium.
| | - Florentina Lupascu
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, "Grigore T. Popa" University of Medicine and Pharmacy Iasi, 16 University Street, Iasi 700115, Romania.
| | - Andreea Pânzariu
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, "Grigore T. Popa" University of Medicine and Pharmacy Iasi, 16 University Street, Iasi 700115, Romania.
| | - Peter Dubruel
- Polymer Chemistry & Biomaterials Research Group, Ghent University, Krijgslaan 281, S4-Bis, Ghent 9000, Belgium.
| | - Dan Lupascu
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, "Grigore T. Popa" University of Medicine and Pharmacy Iasi, 16 University Street, Iasi 700115, Romania.
| | - Cristina Tuchilus
- Department of Microbiology, Faculty of Pharmacy, "Grigore T. Popa" University of Medicine and Pharmacy Iasi, 16 University Street, Iasi 700115, Romania.
| | - Cornelia Vasile
- Department of Physical Chemistry of Polymers, "Petru Poni" Institute of Macromolecular Chemistry, 41A Grigore Ghica Voda Alley, Iasi 700487, Romania.
| | - Lenuta Profire
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, "Grigore T. Popa" University of Medicine and Pharmacy Iasi, 16 University Street, Iasi 700115, Romania.
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9
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Supercritical CO2 antisolvent precipitation from biocompatible polymer solutions: A novel sustainable approach for biomaterials design and fabrication. J Supercrit Fluids 2015. [DOI: 10.1016/j.supflu.2015.03.021] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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10
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Causa A, Filippone G, Domingo C, Salerno A. Study of the morphology and texture of poly(ε-caprolactone)/polyethylene oxide blend films as a function of composition and the addition of nanofillers with different functionalities. RSC Adv 2015. [DOI: 10.1039/c5ra08864j] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Aiming to prepare films of semicrystalline polymer blends through solvent casting, the surface morphology and texture can be tuned by varying the polymer content and/or adding nanoparticles to the starting solution.
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Affiliation(s)
- Andrea Causa
- Department of Chemical
- Materials and Production Engineering (DICMaPI)
- University of Naples Federico II
- 80125 Naples
- Italy
| | - Giovanni Filippone
- Department of Chemical
- Materials and Production Engineering (DICMaPI)
- University of Naples Federico II
- 80125 Naples
- Italy
| | - Concepción Domingo
- Institute of Materials Science of Barcelona (ICMAB-CSIC)
- Campus de la UAB s/n
- 08193 Bellaterra
- Spain
| | - Aurelio Salerno
- Institute of Materials Science of Barcelona (ICMAB-CSIC)
- Campus de la UAB s/n
- 08193 Bellaterra
- Spain
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