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Guan T, Tatu R, Wima K, Oria M, Peiro JL, Lin CY, Rao MB. Profile of a Multivariate Observation under Destructive Sampling-A Monte Carlo Approach to a Case of Spina Bifida. Bioengineering (Basel) 2024; 11:249. [PMID: 38534523 DOI: 10.3390/bioengineering11030249] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2024] [Revised: 02/28/2024] [Accepted: 03/01/2024] [Indexed: 03/28/2024] Open
Abstract
A biodegradable hybrid polymer patch was invented at the University of Cincinnati to cover gaps on the skin over the spinal column of a growing fetus, characterized by the medical condition spina bifida. The inserted patch faces amniotic fluid (AF) on one side and cerebrospinal fluid on the other side. The goal is to provide a profile of the roughness of a patch over time at 0, 4, 8, 12, and 16 weeks with a 95% confidence band. The patch is soaked in a test tube filled with either amniotic fluid (AF) or phosphate-buffered saline (PBS) in the lab. If roughness is measured at any time point for a patch, the patch is destroyed. Thus, it is impossible to measure roughness at all weeks of interest for any patch. It is important to assess the roughness of a patch because the rougher the patch is, the faster the skin grows under the patch. We use a model-based approach with Monte Carlo simulations to estimate the profile over time with a 95% confidence band. The roughness profiles are similar with both liquids. The profile can be used as a template for future experiments on the composition of patches.
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Affiliation(s)
- Tianyuan Guan
- College of Public Health, Kent State University, Kent, OH 44242, USA
- Division of Biostatistics and Bioinformatics, University of Cincinnati, Cincinnati, OH 45221, USA
| | - Rigwed Tatu
- The Center for Fetal and Placental Research, Pediatric General and Thoracic Surgery Division, Cincinnati Children's Hospital Medical Center, Cincinnati, OH 45229, USA
| | - Koffi Wima
- Division of Biostatistics and Bioinformatics, University of Cincinnati, Cincinnati, OH 45221, USA
| | - Marc Oria
- The Center for Fetal and Placental Research, Pediatric General and Thoracic Surgery Division, Cincinnati Children's Hospital Medical Center, Cincinnati, OH 45229, USA
| | - Jose L Peiro
- The Center for Fetal and Placental Research, Pediatric General and Thoracic Surgery Division, Cincinnati Children's Hospital Medical Center, Cincinnati, OH 45229, USA
| | - Chia-Ying Lin
- Orthopedic Surgery, University of Cincinnati College of Medicine, Cincinnati, OH 45267, USA
| | - Marepalli B Rao
- Division of Biostatistics and Bioinformatics, University of Cincinnati, Cincinnati, OH 45221, USA
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Stafin K, Śliwa P, Piątkowski M. Towards Polycaprolactone-Based Scaffolds for Alveolar Bone Tissue Engineering: A Biomimetic Approach in a 3D Printing Technique. Int J Mol Sci 2023; 24:16180. [PMID: 38003368 PMCID: PMC10671727 DOI: 10.3390/ijms242216180] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2023] [Revised: 11/05/2023] [Accepted: 11/07/2023] [Indexed: 11/26/2023] Open
Abstract
The alveolar bone is a unique type of bone, and the goal of bone tissue engineering (BTE) is to develop methods to facilitate its regeneration. Currently, an emerging trend involves the fabrication of polycaprolactone (PCL)-based scaffolds using a three-dimensional (3D) printing technique to enhance an osteoconductive architecture. These scaffolds are further modified with hydroxyapatite (HA), type I collagen (CGI), or chitosan (CS) to impart high osteoinductive potential. In conjunction with cell therapy, these scaffolds may serve as an appealing alternative to bone autografts. This review discusses research gaps in the designing of 3D-printed PCL-based scaffolds from a biomimetic perspective. The article begins with a systematic analysis of biological mineralisation (biomineralisation) and ossification to optimise the scaffold's structural, mechanical, degradation, and surface properties. This scaffold-designing strategy lays the groundwork for developing a research pathway that spans fundamental principles such as molecular dynamics (MD) simulations and fabrication techniques. Ultimately, this paves the way for systematic in vitro and in vivo studies, leading to potential clinical applications.
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Affiliation(s)
- Krzysztof Stafin
- Department of Organic Chemistry and Technology, Faculty of Chemical Engineering and Technology, Cracow University of Technology, ul. Warszawska 24, PL 31-155 Kraków, Poland; (K.S.); (P.Ś.)
- Department of Biotechnology and Physical Chemistry, Faculty of Chemical Engineering and Technology, Cracow University of Technology, ul. Warszawska 24, PL 31-155 Kraków, Poland
| | - Paweł Śliwa
- Department of Organic Chemistry and Technology, Faculty of Chemical Engineering and Technology, Cracow University of Technology, ul. Warszawska 24, PL 31-155 Kraków, Poland; (K.S.); (P.Ś.)
| | - Marek Piątkowski
- Department of Biotechnology and Physical Chemistry, Faculty of Chemical Engineering and Technology, Cracow University of Technology, ul. Warszawska 24, PL 31-155 Kraków, Poland
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Szydlowska BM, Ding Y, Moore C, Cai Z, Torres-Castanedo CG, Jones E, Hersam MC, Sun C, Ameer GA. A polydiolcitrate-MoS 2 composite for 3D printing Radio-opaque, Bioresorbable Vascular Scaffolds. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.10.27.564364. [PMID: 37961681 PMCID: PMC10634906 DOI: 10.1101/2023.10.27.564364] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2023]
Abstract
Implantable polymeric biodegradable devices, such as biodegradable vascular stents or scaffolds, cannot be fully visualized using standard X-ray-based techniques, compromising their performance due to malposition after deployment. To address this challenge, we describe composites of methacrylated poly(1,12 dodecamethylene citrate) (mPDC) and MoS2 nanosheets to fabricate novel X-ray visible radiopaque and photocurable liquid polymer-ceramic composite (mPDC-MoS2). The composite was used as an ink with micro continuous liquid interface production (μCLIP) to fabricate bioresorbable vascular scaffolds (BVS). Prints exhibited excellent crimping and expansion mechanics without strut failures and, importantly, required X-ray visibility in air and muscle tissue. Notably, MoS2 nanosheets displayed physical degradation over time in a PBS environment, indicating the potential for producing bioresorbable devices. mPDC-MoS2 is a promising bioresorbable X-ray-visible composite material suitable for 3D printing medical devices, particularly vascular scaffolds or stents, that require non-invasive X-ray-based monitoring techniques for implantation and evaluation. This innovative composite system holds significant promise for the development of biocompatible and highly visible medical implants, potentially enhancing patient outcomes and reducing medical complications.
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Affiliation(s)
- Beata M. Szydlowska
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL 60208, USA
| | - Yonghui Ding
- Center for Advanced Regenerative Engineering (CARE), Northwestern University, Evanston, IL 60208, USA
- Department of Biomedical Engineering, Northwestern University, Evanston, IL 60208, USA
| | - Connor Moore
- Center for Advanced Regenerative Engineering (CARE), Northwestern University, Evanston, IL 60208, USA
| | - Zizhen Cai
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL 60208, USA
| | | | - Evan Jones
- Center for Advanced Regenerative Engineering (CARE), Northwestern University, Evanston, IL 60208, USA
- Department of Mechanical Engineering, Northwestern University, Evanston, IL 60208, USA
| | - Mark C. Hersam
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL 60208, USA
- Department of Chemistry, Northwestern University, Evanston, IL 60208, USA
- Department of Electrical and Computer Engineering, Northwestern University, Evanston, IL 60208, USA
| | - Cheng Sun
- Center for Advanced Regenerative Engineering (CARE), Northwestern University, Evanston, IL 60208, USA
- Department of Mechanical Engineering, Northwestern University, Evanston, IL 60208, USA
| | - Guillermo A. Ameer
- Center for Advanced Regenerative Engineering (CARE), Northwestern University, Evanston, IL 60208, USA
- Department of Biomedical Engineering, Northwestern University, Evanston, IL 60208, USA
- Department of Surgery, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
- Simpson Querrey Institute, Northwestern University, Evanston, IL 60208, USA
- Chemistry for Life Processes Institute, Northwestern University, IL, 60208, USA
- International Institute for Nanotechnology, Northwestern University, IL, 60208, USA
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Synthesis of Bio-Based Polyester from Microbial Lipidic Residue Intended for Biomedical Application. Int J Mol Sci 2023; 24:ijms24054419. [PMID: 36901850 PMCID: PMC10003017 DOI: 10.3390/ijms24054419] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2023] [Revised: 02/13/2023] [Accepted: 02/21/2023] [Indexed: 02/25/2023] Open
Abstract
In the last decade, selectively tuned bio-based polyesters have been increasingly used for their clinical potential in several biomedical applications, such as tissue engineering, wound healing, and drug delivery. With a biomedical application in mind, a flexible polyester was produced by melt polycondensation using the microbial oil residue collected after the distillation of β-farnesene (FDR) produced industrially by genetically modified yeast, Saccharomyces cerevisiae. After characterization, the polyester exhibited elongation up to 150% and presented Tg of -51.2 °C and Tm of 169.8 °C. In vitro degradation revealed a mass loss of about 87% after storage in PBS solution for 11 weeks under accelerated conditions (40 °C, RH = 75%). The water contact angle revealed a hydrophilic character, and biocompatibility with skin cells was demonstrated. 3D and 2D scaffolds were produced by salt-leaching, and a controlled release study at 30 °C was performed with Rhodamine B base (RBB, 3D) and curcumin (CRC, 2D), showing a diffusion-controlled mechanism with about 29.3% of RBB released after 48 h and 50.4% of CRC after 7 h. This polymer offers a sustainable and eco-friendly alternative for the potential use of the controlled release of active principles for wound dressing applications.
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Zarei M, Shabani Dargah M, Hasanzadeh Azar M, Alizadeh R, Mahdavi FS, Sayedain SS, Kaviani A, Asadollahi M, Azami M, Beheshtizadeh N. Enhanced bone tissue regeneration using a 3D-printed poly(lactic acid)/Ti6Al4V composite scaffold with plasma treatment modification. Sci Rep 2023; 13:3139. [PMID: 36823295 PMCID: PMC9950435 DOI: 10.1038/s41598-023-30300-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Accepted: 02/21/2023] [Indexed: 02/25/2023] Open
Abstract
The mechanical and biological properties of polylactic acid (PLA) need to be further improved in order to be used for bone tissue engineering (BTE). Utilizing a material extrusion technique, three-dimensional (3D) PLA-Ti6Al4V (Ti64) scaffolds with open pores and interconnected channels were successfully fabricated. In spite of the fact that the glass transition temperature of PLA increased with the addition of Ti64, the melting and crystallization temperatures as well as the thermal stability of filaments decreased slightly. However, the addition of 3-6 wt% Ti64 enhanced the mechanical properties of PLA, increasing the ultimate compressive strength and compressive modulus of PLA-3Ti64 to 49.9 MPa and 1.9 GPa, respectively. Additionally, the flowability evaluations revealed that all composite filaments met the print requirements. During the plasma treatment of scaffolds, not only was the root-mean-square (Rq) of PLA (1.8 nm) increased to 60 nm, but also its contact angle (90.4°) significantly decreased to (46.9°). FTIR analysis confirmed the higher hydrophilicity as oxygen-containing groups became more intense. By virtue of the outstanding role of plasma treatment as well as Ti64 addition, a marked improvement was observed in Wharton's jelly mesenchymal stem cell attachment, proliferation (4',6-diamidino-2-phenylindole staining), and differentiation (Alkaline phosphatase and Alizarin Red S staining). Based on these results, it appears that the fabricated scaffolds have potential applications in BTE.
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Affiliation(s)
- Masoud Zarei
- Department of Materials Science and Engineering, Sharif University of Technology, Tehran, Iran. .,Regenerative Medicine Group (REMED), Universal Scientific Education and Research Network (USERN), Tehran, Iran.
| | - Motahareh Shabani Dargah
- grid.411368.90000 0004 0611 6995Department of Biomedical Engineering, Amirkabir University of Technology, Tehran, Iran
| | - Mahdi Hasanzadeh Azar
- grid.25073.330000 0004 1936 8227Department of Engineering Physics, McMaster University, Hamilton, Canada
| | - Reza Alizadeh
- Department of Materials Science and Engineering, Sharif University of Technology, Tehran, Iran.
| | - Fatemeh Sadat Mahdavi
- grid.46072.370000 0004 0612 7950Department of Biotechnology Engineering, College of Science, University of Tehran, Tehran, Iran
| | - Sayed Shahab Sayedain
- grid.412553.40000 0001 0740 9747Department of Materials Science and Engineering, Sharif University of Technology, Tehran, Iran
| | - Alireza Kaviani
- grid.412553.40000 0001 0740 9747Polymeric Materials Research Group (PMRG), Department of Materials Science and Engineering, Sharif University of Technology, Tehran, Iran
| | - Mohammad Asadollahi
- grid.412553.40000 0001 0740 9747Department of Materials Science and Engineering, Sharif University of Technology, Tehran, Iran
| | - Mahmoud Azami
- grid.411705.60000 0001 0166 0922Department of Tissue Engineering, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran ,grid.510410.10000 0004 8010 4431Regenerative Medicine Group (REMED), Universal Scientific Education and Research Network (USERN), Tehran, Iran ,grid.411705.60000 0001 0166 0922Joint Reconstruction Research Center (JRRC), Tehran University of Medical Sciences, Tehran, Iran
| | - Nima Beheshtizadeh
- Department of Tissue Engineering, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran. .,Regenerative Medicine Group (REMED), Universal Scientific Education and Research Network (USERN), Tehran, Iran.
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Bikiaris ND, Koumentakou I, Michailidou G, Kostoglou M, Vlachou M, Barmpalexis P, Karavas E, Papageorgiou GZ. Investigation of Molecular Weight, Polymer Concentration and Process Parameters Factors on the Sustained Release of the Anti-Multiple-Sclerosis Agent Teriflunomide from Poly( ε-caprolactone) Electrospun Nanofibrous Matrices. Pharmaceutics 2022; 14:pharmaceutics14081693. [PMID: 36015319 PMCID: PMC9412398 DOI: 10.3390/pharmaceutics14081693] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Revised: 08/06/2022] [Accepted: 08/10/2022] [Indexed: 11/16/2022] Open
Abstract
In the current work, a series of PCL polyesters with different molecular weights was synthesized and used for the fabrication of nanofibrous patches via electrospinning, as sustained release matrices for leflunomide’s active metabolite, teriflunomide (TFL). The electrospinning conditions for each sample were optimized and it was found that only one material with high Mn (71,000) was able to produce structures with distinct fibers devoid of the presence of beads. The successful preparation of the fibers was determined by scanning electron microscopy (SEM).TFL (10, 20 and 30 wt%) in three different concentrations was incorporated into the prepared nanofibers, which were used in in vitro drug release experiments. The drug-loaded nanofibrous formulations were further characterized by Fourier transform infrared spectroscopy (FTIR), differential scanning calorimetry (DSC) and powder X-ray diffractometry (XRD).It was found that TFL was incorporated in an amorphous form inside the polymeric nanofibers and that significant molecular interactions were formed between the drug and the polyester. Additionally, in vitro dissolution studies showed that the PCL/TFL-loaded nanofibers exhibit a biphasic release profile, having an initial burst release phase, followed by a sustained release until 250 h. Finally, a kinetic analysis of the obtained profiles revealed that the drug release was directly dependent on the amount TFL incorporated into the nanofibers.
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Affiliation(s)
- Nikolaos D. Bikiaris
- Laboratory of Polymer Chemistry and Technology, Department of Chemistry, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
| | - Ioanna Koumentakou
- Laboratory of Polymer Chemistry and Technology, Department of Chemistry, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
| | - Georgia Michailidou
- Laboratory of Polymer Chemistry and Technology, Department of Chemistry, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
| | - Margaritis Kostoglou
- Laboratory of General and Inorganic Chemical Technology, Department of Chemistry, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
| | - Marilena Vlachou
- Section of Pharmaceutical Technology, Department of Pharmacy, School of Health Sciences, National and Kapodistrian University of Athens, Panepistimioupoli-Zografou, 15784 Athens, Greece
| | - Panagiotis Barmpalexis
- Department of Pharmaceutical Technology, School of Pharmacy, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
| | - Evangelos Karavas
- Pharmathen S.A., Pharmaceutical Industry, Dervenakion Str. 6, Pallini Attikis, 15351 Athens, Greece
| | - George Z. Papageorgiou
- Department of Chemistry, University of Ioannina, P.O. Box 1186, 45110 Ioannina, Greece
- Correspondence:
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