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Antkiewicz M, Kuliczkowski W, Protasiewicz M, Zubilewicz T, Terlecki P, Kobielarz M, Janczak D. Aneurysm Sac Pressure during Branched Endovascular Aneurysm Repair versus Multilayer Flow Modulator Implantation in Patients with Thoracoabdominal Aortic Aneurysm. Int J Environ Res Public Health 2022; 19:14563. [PMID: 36361444 PMCID: PMC9655300 DOI: 10.3390/ijerph192114563] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/25/2022] [Revised: 10/31/2022] [Accepted: 11/03/2022] [Indexed: 06/16/2023]
Abstract
Open thoracoabdominal repair is the gold standard in the TAAA treatment. However, there are endovascular techniques, that sometimes may be an alternative, such as branched endovascular aneurysm repair (BEVAR) or implantation of the multilayer flow modulator (MFM). In this study, we aimed to assess differences in the aneurysm sac pressure (ASP) between patients undergoing BEVAR and MFM implantation. The study included 22 patients with TAAA (14 patients underwent BEVAR, while eight MFM implantation). The pressure sensor wire was placed inside the aneurysm. A measurement of ASP and aortic pressure (AP) was performed during the procedure. The systolic pressure index (SPI), diastolic pressure index (DPI), and pulse pressure index (PPI) were calculated as a quotient of the ASP and AP values. After the procedure, SPI and PPI were lower in the BEVAR group than in the MFM group. During a procedure, a drop in SPI and PPI was noted in patients undergoing BEVAR, while no changes were revealed in the MFM group. This indicates that BEVAR, but not MFM, is associated with a reduction in systolic and pulse pressure in the aneurysm sac in patients with TAAA.
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Affiliation(s)
- Maciej Antkiewicz
- Department of Vascular, General and Transplantation Surgery, Wroclaw Medical University, 50-367 Wroclaw, Poland
| | - Wiktor Kuliczkowski
- Department of Cardiology, Wroclaw Medical University, 50-367 Wroclaw, Poland
| | - Marcin Protasiewicz
- Department of Cardiology, Wroclaw Medical University, 50-367 Wroclaw, Poland
| | - Tomasz Zubilewicz
- Department of Vascular Surgery and Angiology, Medical University of Lublin, 20-059 Lublin, Poland
| | - Piotr Terlecki
- Department of Vascular Surgery and Angiology, Medical University of Lublin, 20-059 Lublin, Poland
| | - Magdalena Kobielarz
- Department of Mechanics, Materials Science and Biomedical Engineering, Wroclaw University of Science and Technology, 50-370 Wroclaw, Poland
| | - Dariusz Janczak
- Department of Vascular, General and Transplantation Surgery, Wroclaw Medical University, 50-367 Wroclaw, Poland
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Antkiewicz M, Protasiewicz M, Kuliczkowski W, Zubilewicz T, Terlecki P, Kobielarz M, Janczak D. Preliminary Assessment of Intra-Aneurysm Sac Pressure During Endovascular Aneurysm Repair as an Early Prognostic Factor of Aneurysm Enlargement. Vasc Health Risk Manag 2022; 18:677-684. [PMID: 36071744 PMCID: PMC9443997 DOI: 10.2147/vhrm.s371569] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Accepted: 08/04/2022] [Indexed: 11/23/2022] Open
Abstract
Purpose Numerous cases of abdominal aortic aneurysm (AAA) enlargement, and even rupture, despite endovascular aneurysm repair (EVAR), have been documented. This has been linked to increased aneurysm sac pressure (ASP). We decided to conduct further research with the aim to identify correlations between ASP during EVAR and subsequent aneurysm enlargement. Patients and Methods This experimental prospective study included 30 patients undergoing EVAR of infrarenal AAAs. Invasive ASP measurements were done using a thin pressure wire. Aortic pressure (AP) was measured using a catheter placed over the wire. Systolic pressure index (SPI), diastolic pressure index (DPI), mean pressure index (MPI), and pulse pressure index (PPI) were calculated both for ASP and AP. The results of follow-up computed tomography angiography (CTA) at 3 months were compared with baseline CTA findings. Results During EVAR, a significant reduction was observed for SPI (from 98% to 61%), DPI (from 100% to 87%), MPI (from 99% to 74%), and PPI (from 97% to 34%). There were no significant correlations of pressure indices with an aneurysm diameter, cross-sectional area, velocity, thrombus shape and size, number of patent lumbar arteries, length and diameter of aneurysm neck, diameter of the inferior mesenteric artery, as well as diameter and angle of common iliac arteries. On the other hand, aneurysm neck angulation was significantly inversely correlated with reduced PPI. After combining CTA findings with pressure measurements, we identified a positive correlation between PPI and aneurysm enlargement (ratio of the cross-sectional area at the widest spot at baseline and at 3 months after EVAR). Conclusion The study showed that ASP can be successfully measured during EVAR and can facilitate the assessment of treatment efficacy. In particular, PPI can serve as a prognostic factor of aneurysm enlargement and can help identify high-risk patients who remain prior monitoring.
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Affiliation(s)
- Maciej Antkiewicz
- Department and Clinic of Vascular, General and Transplantation Surgery, Wrocław Medical University, Wrocław, Poland
- Correspondence: Maciej Antkiewicz, Department and Clinic of Vascular, General and Transplantation Surgery, Wrocław Medical University, Borowska 213, Wrocław, 50-556, Poland, Tel +48 71 733 2003, Fax +48 71 733 2009, Email
| | - Marcin Protasiewicz
- Department and Clinic of Cardiology, Wrocław Medical University, Wrocław, Poland
| | - Wiktor Kuliczkowski
- Department and Clinic of Cardiology, Wrocław Medical University, Wrocław, Poland
| | - Tomasz Zubilewicz
- Department and Clinic of Vascular Surgery and Angiology, Medical University of Lublin, Lublin, Poland
| | - Piotr Terlecki
- Department and Clinic of Vascular Surgery and Angiology, Medical University of Lublin, Lublin, Poland
| | - Magdalena Kobielarz
- Department of Mechanics, Materials Science and Biomedical Engineering, Wrocław University of Science and Technology, Wrocław, Poland
| | - Dariusz Janczak
- Department and Clinic of Vascular, General and Transplantation Surgery, Wrocław Medical University, Wrocław, Poland
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Sterczała B, Chwiłkowska A, Szwedowicz U, Kobielarz M, Chwiłkowski B, Dominiak M. Impact of APRF+ in Combination with Autogenous Fibroblasts on Release Growth Factors, Collagen, and Proliferation and Migration of Gingival Fibroblasts: An In Vitro Study. Materials (Basel) 2022; 15:ma15030796. [PMID: 35160741 PMCID: PMC8836484 DOI: 10.3390/ma15030796] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/11/2021] [Revised: 01/14/2022] [Accepted: 01/18/2022] [Indexed: 01/01/2023]
Abstract
The present study aimed to compare the action of advanced platelet-rich fibrin (A-PRF+) alone with the action of A-PRF+ combined with autologous gingival fibroblasts. The components released from A-PRF+ conditioned with autogenous fibroblasts that were quantified in the study were fibroblast growth factor (FGF), vascular endothelial growth factor (VEGF), trans-forming growth factor-beta1 and 2 (TGFβ1 and TGFβ2), and soluble collagen. A-PRF+ combined with fibroblasts demonstrated significantly higher values of released VEGF at every time point and, after 7 days, significantly higher values of released TGFβ2. A viability test after 72 h showed a significant increase in proliferation fibroblasts after exposition to the factors released from A-PRF+ combined with fibroblasts. Similarly, the degree of wound closure after 48 h was significantly higher for the factors released from A-RRF+ alone and the factors released from A-RRF+ combined with fibroblasts. These results imply that platelet-rich fibrin (PRF) enhanced with fibroblasts can be an alternative method of connective tissue transplantation.
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Affiliation(s)
- Barbara Sterczała
- Dental Surgery Department, Wroclaw Medical University, 50-425 Wroclaw, Poland;
- Correspondence: (B.S.); (A.C.); Tel.: +48-502-932-269 (B.S.)
| | - Agnieszka Chwiłkowska
- Department of Molecular and Cell Biology, Wroclaw Medical University, 50-556 Wroclaw, Poland;
- Correspondence: (B.S.); (A.C.); Tel.: +48-502-932-269 (B.S.)
| | - Urszula Szwedowicz
- Department of Molecular and Cell Biology, Wroclaw Medical University, 50-556 Wroclaw, Poland;
| | - Magdalena Kobielarz
- Department of Mechanics, Materials and Biomedical Engineering, Wroclaw University of Science and Technology, 50-371 Wroclaw, Poland;
| | - Bartłomiej Chwiłkowski
- Department of Applied Mathematics, Faculty of Pure and Applied Mathematics, Wroclaw University of Science and Technology, 50-370 Wroclaw, Poland;
| | - Marzena Dominiak
- Dental Surgery Department, Wroclaw Medical University, 50-425 Wroclaw, Poland;
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Dąbrowska KZ, Turek A, Grzejda R, Kobielarz M. Mechanical properties of the porcine pericardium extracellular matrix cross-linked with glutaraldehyde and tannic acid. Acta Bioeng Biomech 2022. [DOI: 10.37190/abb-02119-2022-01] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Purpose
The aim of study was to determine the influence of factors such as temperature and glutaraldehyde (GA) concentration on the mechanical properties of porcine pericardia, and to propose the recommended optimal conditions for a cross-linking process. It was also to verify whether tannic acid (TA), a natural cross-linking agent that stabilizes collagenous tissues by different mechanism than GA, may positively influence the strength of pericardium.
Methods
The samples were incubated at various temperatures (4, 22, and 37°C) and GA concentration solutions (0.6%, 1.5%, 3%) for 7 days. Three series were selected and additionally cross-linked with 0.3% TA for another 7 days. Mechanical properties of cross-linked pericardium samples, i.e. ultimate tensile strength (UTS) and elastic modulus (E), were measured in uniaxial tensile testing. The hyperelastic model for incompressible materials – isotropic by Ogden and anisotropic by Fung was utilized to describe the mechanical behaviour of treated pericardium.
Results
The temperature has influence on cross-linking effects; the lowest values of UTS were reported for specimens cross-linked at 22°C, while the mechanical properties of series treated at 4°C or 37°C were comparable. At a particular temperature of incubation, the GA concentrations have not affected the mechanical properties of tissues. The dependence between mechanical parameters and agent concentration was only observed for specimens treated with GA at 37°C.
Conclusions
The conditions of the cross-linking process affect the mechanical properties of the porcine pericardium. Room temperature (22°C) and the concentration of 1.5% GA were ineffective. The mechanical properties of GA-treated pericardium were improved by an additional TA cross-linking.
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Dąbrowska KZ, Turek A, Grzejda R, Kobielarz M. Mechanical properties of the porcine pericardium extracellular matrix cross-linked with glutaraldehyde and tannic acid. Acta Bioeng Biomech 2022; 24:21-30. [PMID: 38314459] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2024]
Abstract
PURPOSE The aim of this study was to determine the influence of factors such as temperature and glutaraldehyde (GA) concentration on the mechanical properties of porcine pericardia, in order to propose the recommended optimal conditions of a cross-linking process. It was also to verify whether tannic acid (TA), a natural cross-linking agent that stabilizes collagenous tissues by a different mechanism than GA, may positively influence the strength of pericardium. METHODS The samples were incubated at various temperatures (4, 22, and 37°C) and GA concentration solutions (0.6, 1.5 and 3%) for 7 days. Three series were selected and additionally cross-linked with 0.3% TA for another 7 days. Mechanical properties of cross-linked pericardium samples, i.e., ultimate tensile strength (UTS) and elastic modulus (E) were measured in uniaxial tensile testing. The hyperelastic model for incompressible materials - isotropic by Ogden [24] and anisotropic by Fung [7] were utilized to describe the mechanical behaviour of treated pericardium. RESULTS The temperature has an influence on cross-linking effects; the lowest values of UTS were reported for specimens cross-linked at 22 °C, while the mechanical properties of series treated at 4°C or 37°C were comparable. At a particular temperature of incubation, the GA concentrations have not affected the mechanical properties of tissues. The dependence between mechanical parameters and agent concentration was only observed for specimens treated with GA at 37 °C. CONCLUSIONS The conditions of the cross-linking process affect the mechanical properties of the porcine pericardium. Room temperature (22 °C) and the concentration of 1.5% GA occurred to be ineffective. The mechanical properties of GA-treated pericardium were improved by an additional TA cross-linking.
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Affiliation(s)
- Karolina Zofia Dąbrowska
- Faculty of Mechanical Engineering, Wrocław University of Science and Technology, Wrocław, Poland
| | - Artur Turek
- Department of Biopharmacy, Faculty of Pharmaceutical Sciences in Sosnowiec, Medical University of Silesia, Katowice, Poland
| | - Rafał Grzejda
- Department of Mechanics, Faculty of Mechanical Engineering and Mechatronics, West Pomeranian University of Technology in Szczecin, Szczecin, Poland
| | - Magdalena Kobielarz
- Department of Mechanics, Materials and Biomedical Engineering, Faculty of Mechanical Engineering, Wrocław University of Science and Technology, Wrocław, Poland
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Turek A, Rech J, Borecka A, Wilińska J, Kobielarz M, Janeczek H, Kasperczyk J. The Role of the Mechanical, Structural, and Thermal Properties of Poly(l-lactide- co-glycolide- co-trimethylene carbonate) in the Development of Rods with Aripiprazole. Polymers (Basel) 2021; 13:polym13203556. [PMID: 34685315 PMCID: PMC8539605 DOI: 10.3390/polym13203556] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2021] [Revised: 09/29/2021] [Accepted: 10/01/2021] [Indexed: 11/16/2022] Open
Abstract
In this work, we aimed to determine the role of the mechanical, structural, and thermal properties of poly(l-lactide-co-glycolide-co-trimethylene carbonate) (P(l-LA:GA:TMC)) with shape memory in the formulation of implantable and biodegradable rods with aripiprazole (ARP). Hot melt extrusion (HME) and electron beam (EB) irradiation were applied in the formulation process of blank rods and rods with ARP. Rod degradation was carried out in a PBS solution. HPLC; NMR; DSC; compression and tensile tests; molecular weight (Mn); water uptake (WU); and weight loss (WL) analyses; and SEM were used in this study. HME and EB irradiation did not influence the structure of ARP. The mechanical tests indicated that the rods may be safely implanted using a pre-filled syringe. During degradation, no unfavorable changes in terpolymer content were observed. A decrease in the glass transition temperature and the Mn, and an increase in the WU and the WL were revealed. The loading of ARP and EB irradiation induced earlier pore formation and more intense WU and WL changes. ARP was released in a tri-phasic model with the lag phase; therefore, the proposed formulation may be administered as a delayed-release system. EB irradiation was found to accelerate ARP release.
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Affiliation(s)
- Artur Turek
- Chair and Department of Biopharmacy, Faculty of Pharmaceutical Sciences in Sosnowiec, Medical University of Silesia, Katowice, Jedności 8, 41-200 Sosnowiec, Poland; (J.W.); (J.K.)
- Correspondence: or ; Tel.: +48-32-364-12-17; Fax: +48-32-364-12-66
| | - Jakub Rech
- Department of Biotechnology and Genetic Engineering, Faculty of Pharmaceutical Sciences in Sosnowiec, Medical University of Silesia, Katowice, Jedności 8, 41-200 Sosnowiec, Poland;
| | - Aleksandra Borecka
- Centre of Polymer and Carbon Materials, Polish Academy of Sciences, M. Curie-Skłodowskiej 34, 41-819 Zabrze, Poland; (A.B.); (H.J.)
| | - Justyna Wilińska
- Chair and Department of Biopharmacy, Faculty of Pharmaceutical Sciences in Sosnowiec, Medical University of Silesia, Katowice, Jedności 8, 41-200 Sosnowiec, Poland; (J.W.); (J.K.)
| | - Magdalena Kobielarz
- Department of Mechanics, Materials and Biomedical Engineering, Faculty of Mechanical Engineering, Wrocław University of Science and Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wroclaw, Poland;
| | - Henryk Janeczek
- Centre of Polymer and Carbon Materials, Polish Academy of Sciences, M. Curie-Skłodowskiej 34, 41-819 Zabrze, Poland; (A.B.); (H.J.)
| | - Janusz Kasperczyk
- Chair and Department of Biopharmacy, Faculty of Pharmaceutical Sciences in Sosnowiec, Medical University of Silesia, Katowice, Jedności 8, 41-200 Sosnowiec, Poland; (J.W.); (J.K.)
- Centre of Polymer and Carbon Materials, Polish Academy of Sciences, M. Curie-Skłodowskiej 34, 41-819 Zabrze, Poland; (A.B.); (H.J.)
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Piszko P, Włodarczyk M, Zielińska S, Gazińska M, Płociński P, Rudnicka K, Szwed A, Krupa A, Grzymajło M, Sobczak-Kupiec A, Słota D, Kobielarz M, Wojtków M, Szustakiewicz K. PGS/HAp Microporous Composite Scaffold Obtained in the TIPS-TCL-SL Method: An Innovation for Bone Tissue Engineering. Int J Mol Sci 2021; 22:8587. [PMID: 34445293 PMCID: PMC8395318 DOI: 10.3390/ijms22168587] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Revised: 08/06/2021] [Accepted: 08/08/2021] [Indexed: 12/16/2022] Open
Abstract
In this research, we synthesize and characterize poly(glycerol sebacate) pre-polymer (pPGS) (1H NMR, FTiR, GPC, and TGA). Nano-hydroxyapatite (HAp) is synthesized using the wet precipitation method. Next, the materials are used to prepare a PGS-based composite with a 25 wt.% addition of HAp. Microporous composites are formed by means of thermally induced phase separation (TIPS) followed by thermal cross-linking (TCL) and salt leaching (SL). The manufactured microporous materials (PGS and PGS/HAp) are then subjected to imaging by means of SEM and µCT for the porous structure characterization. DSC, TGA, and water contact angle measurements are used for further evaluation of the materials. To assess the cytocompatibility and biological potential of PGS-based composites, preosteoblasts and differentiated hFOB 1.19 osteoblasts are employed as in vitro models. Apart from the cytocompatibility, the scaffolds supported cell adhesion and were readily populated by the hFOB1.19 preosteoblasts. HAp-facilitated scaffolds displayed osteoconductive properties, supporting the terminal differentiation of osteoblasts as indicated by the production of alkaline phosphatase, osteocalcin and osteopontin. Notably, the PGS/HAp scaffolds induced the production of significant amounts of osteoclastogenic cytokines: IL-1β, IL-6 and TNF-α, which induced scaffold remodeling and promoted the reconstruction of bone tissue. Initial biocompatibility tests showed no signs of adverse effects of PGS-based scaffolds toward adult BALB/c mice.
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Affiliation(s)
- Paweł Piszko
- Department of Polymer Engineering and Technology, Faculty of Chemistry, Wrocław University of Science and Technology (WUST), Wyb. Wyspiańskiego 27, 50-370 Wrocław, Poland; (S.Z.); (M.G.); (M.G.)
| | - Marcin Włodarczyk
- Department of Immunology and Infectious Biology, Faculty of Biology and Environmental Protection, University of Łódź, Banacha 12-16, 90-237 Łódź, Poland; (M.W.); (P.P.); (K.R.); (A.S.); (A.K.)
| | - Sonia Zielińska
- Department of Polymer Engineering and Technology, Faculty of Chemistry, Wrocław University of Science and Technology (WUST), Wyb. Wyspiańskiego 27, 50-370 Wrocław, Poland; (S.Z.); (M.G.); (M.G.)
| | - Małgorzata Gazińska
- Department of Polymer Engineering and Technology, Faculty of Chemistry, Wrocław University of Science and Technology (WUST), Wyb. Wyspiańskiego 27, 50-370 Wrocław, Poland; (S.Z.); (M.G.); (M.G.)
| | - Przemysław Płociński
- Department of Immunology and Infectious Biology, Faculty of Biology and Environmental Protection, University of Łódź, Banacha 12-16, 90-237 Łódź, Poland; (M.W.); (P.P.); (K.R.); (A.S.); (A.K.)
| | - Karolina Rudnicka
- Department of Immunology and Infectious Biology, Faculty of Biology and Environmental Protection, University of Łódź, Banacha 12-16, 90-237 Łódź, Poland; (M.W.); (P.P.); (K.R.); (A.S.); (A.K.)
| | - Aleksandra Szwed
- Department of Immunology and Infectious Biology, Faculty of Biology and Environmental Protection, University of Łódź, Banacha 12-16, 90-237 Łódź, Poland; (M.W.); (P.P.); (K.R.); (A.S.); (A.K.)
| | - Agnieszka Krupa
- Department of Immunology and Infectious Biology, Faculty of Biology and Environmental Protection, University of Łódź, Banacha 12-16, 90-237 Łódź, Poland; (M.W.); (P.P.); (K.R.); (A.S.); (A.K.)
| | - Michał Grzymajło
- Department of Polymer Engineering and Technology, Faculty of Chemistry, Wrocław University of Science and Technology (WUST), Wyb. Wyspiańskiego 27, 50-370 Wrocław, Poland; (S.Z.); (M.G.); (M.G.)
| | - Agnieszka Sobczak-Kupiec
- Institute of Materials Science, Faculty of Materials Science and Physics, Cracow University of Technology, 37 Jana Pawła II Av., 31-864 Krakow, Poland; (A.S.-K.); (D.S.)
| | - Dagmara Słota
- Institute of Materials Science, Faculty of Materials Science and Physics, Cracow University of Technology, 37 Jana Pawła II Av., 31-864 Krakow, Poland; (A.S.-K.); (D.S.)
| | - Magdalena Kobielarz
- Department of Mechanics, Materials and Biomedical Engineering, Faculty of Mechanical Engineering, Wroclaw University of Science and Technology (WUST), Wyb. Wyspiańskiego 27, 50-370 Wrocław, Poland; (M.K.); (M.W.)
| | - Magdalena Wojtków
- Department of Mechanics, Materials and Biomedical Engineering, Faculty of Mechanical Engineering, Wroclaw University of Science and Technology (WUST), Wyb. Wyspiańskiego 27, 50-370 Wrocław, Poland; (M.K.); (M.W.)
| | - Konrad Szustakiewicz
- Department of Polymer Engineering and Technology, Faculty of Chemistry, Wrocław University of Science and Technology (WUST), Wyb. Wyspiańskiego 27, 50-370 Wrocław, Poland; (S.Z.); (M.G.); (M.G.)
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Antkiewicz M, Kuliczkowski W, Protasiewicz M, Kobielarz M, Barć P, Malinowski M, Frączkowska K, Kulikowska K, Merenda M, Jacyna K, Dawiskiba T, Janczak D. Intra-aneurysm sac pressure measurement using a thin pressure wire during endovascular aneurysm repair. ADV CLIN EXP MED 2021; 30:309-313. [PMID: 33757162 DOI: 10.17219/acem/133425] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
BACKGROUND An endoleak is a typical complication of endovascular aneurysm repair (EVAR). It is characterized by persistent blood flow between a stent graft and the aneurysm sac. Usually, it can be visualized during primary EVAR, but in many cases, this remains impossible. Therefore, other methods of endoleak assessment are urgently needed. The measurement of aneurysm sac pressure (ASP) seems to be a promising direction of research in this area. OBJECTIVES We aimed to evaluate the safety and efficacy of a new method for invasive pressure measurement inside the abdominal aortic aneurysm (AAA) during EVAR. We also assessed a correlation between pressure values and early angiographic occurrence of an endoleak after the procedure. MATERIAL AND METHODS A total of 20 patients with AAA were included in this experimental prospective study. During EVAR, systolic, diastolic and mean pressure values were recorded both for ASP and aortic pressure (AP) before procedure, after stent graft opening and after final stent graft ballooning. RESULTS The measurements were successfully obtained in all participants without any complications. There were no significant differences between all ASP and AP before procedure. After the procedure, blood pressure significantly decreased in the aneurysm sac but not in the aorta. Systolic ASP was significantly lower than systolic AP both after stent graft opening (80.4 ±20.9 mm Hg compared to 110.7 ±21.6 mm Hg, p < 0.01) and after its balloon post-dilatation (65.6 ±26.1 mm Hg compared to 107.4 ±22.1 mm Hg, p < 0.001). Diastolic ASP decreased significantly in comparison to diastolic AP only after stent graft ballooning (48.0 ±14.6 mm Hg compared to 56.4 ±13.6 mm Hg, p < 0.05). CONCLUSIONS Our study confirmed that the novel method for the measurement of ASP during EVAR, using a thin pressure wire, is feasible and safe.
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Affiliation(s)
- Maciej Antkiewicz
- Department and Clinic of Vascular, General and Transplantation Surgery, Wroclaw Medical University, Poland
| | | | | | - Magdalena Kobielarz
- Department of Mechanics, Materials Science and Biomedical Engineering, Wrocław University of Science and Technology, Poland
| | - Piotr Barć
- Department and Clinic of Vascular, General and Transplantation Surgery, Wroclaw Medical University, Poland
| | - Maciej Malinowski
- Department and Clinic of Vascular, General and Transplantation Surgery, Wroclaw Medical University, Poland
| | - Katarzyna Frączkowska
- Department and Clinic of Vascular, General and Transplantation Surgery, Wroclaw Medical University, Poland
| | - Katarzyna Kulikowska
- Department and Clinic of Vascular, General and Transplantation Surgery, Wroclaw Medical University, Poland
| | - Marcin Merenda
- Department and Clinic of Vascular, General and Transplantation Surgery, Wroclaw Medical University, Poland
| | - Krzysztof Jacyna
- Department and Clinic of Vascular, General and Transplantation Surgery, Wroclaw Medical University, Poland
| | - Tomasz Dawiskiba
- Department and Clinic of Vascular, General and Transplantation Surgery, Wroclaw Medical University, Poland
| | - Dariusz Janczak
- Department and Clinic of Vascular, General and Transplantation Surgery, Wroclaw Medical University, Poland
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Kuzan A, Wisniewski J, Maksymowicz K, Kobielarz M, Gamian A, Chwilkowska A. Relationship between calcification, atherosclerosis and matrix proteins in the human aorta. Folia Histochem Cytobiol 2021; 59:8-21. [PMID: 33560515 DOI: 10.5603/fhc.a2021.0002] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [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: 10/15/2019] [Revised: 06/22/2020] [Accepted: 01/28/2021] [Indexed: 11/25/2022] Open
Abstract
INTRODUCTION Extracellular matrix (ECM) proteins have been associated with atherosclerotic complications, such as plaque rupture, calcification and aneurysm. It is not clear what role different types of collagen play in the pathomechanism of atherosclerosis. The aim of the study was to analyze the content of elastin and major types of collagen in the aortic wall and how they associated are with course of atherosclerosis. MATERIAL AND METHODS In this work we present six biochemical parameters related to ECM proteins and collagen-specific amino acids (collagen type I, III, and IV, elastin, proline and hydroxyproline) analyzed in 106 patients' aortic wall specimens characterized by different degree of atherosclerosis. Liquid Chromatography Electrospray Ionization Tandem Mass Spectrometry (LC/ESI-MS/MS), ELISA and immunohistochemical methods were used. The severity of atherosclerosis was assessed on the six-point scale of the American Heart Association, taking into account the number and location of foam cells, the presence of a fatty core, calcium deposits and other characteristic atherosclerotic features. RESULTS The results show that there is a relationship between the content of collagen-specific amino acids and development of atherosclerosis. The degree of atherosclerotic lesions was negatively correlated with the content of proline, hydroxyproline and the ratio of these two amino acids. Calcium deposits and surrounding tissue were compared and it was demonstrated that the ratio of type I collagen to type III collagen was higher in the aortic tissue than in aortic calcification areas, while the ratio of collagen type III to elastin was smaller in the artery than in the calcium deposits. CONCLUSIONS We suggest that increase in collagen type III presence in the calcification matrix may stem from disorders in the structure of the type I and III collagen fibers. These anomalous fibers are likely to favor accumulation of the calcium salts, an important feature of the process of atheromatosis.
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Affiliation(s)
- Aleksandra Kuzan
- Department of Medical Biochemistry, Faculty of Medicine, Wroclaw Medical University, Wroclaw, Poland.
| | - Jerzy Wisniewski
- Central Laboratory of Instrumental Analysis, Wroclaw University of Science and Technology, Wroclaw, Poland
| | - Krzysztof Maksymowicz
- Department of Forensic Medicine, Faculty of Medicine, Wroclaw Medical University, Wroclaw, Poland
| | - Magdalena Kobielarz
- Department of Mechanics, Materials and Biomedical Engineering, Faculty of Mechanical Engineering, Wroclaw University of Science and Technology, Wroclaw, Poland
| | - Andrzej Gamian
- Department of Medical Biochemistry, Faculty of Medicine, Wroclaw Medical University, Wroclaw, Poland.,Department of Immunology of Infectious Diseases, Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, Wrocław, Poland
| | - Agnieszka Chwilkowska
- Department of Molecular and Cellular Biology, Faculty of Pharmacy, Wroclaw Medical University, Wroclaw, Poland
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Kozuń M, Chwiłkowska A, Pezowicz C, Kobielarz M. Influence of atherosclerosis on anisotropy and incompressibility of the human thoracic aortic wall. Biocybern Biomed Eng 2021. [DOI: 10.1016/j.bbe.2020.11.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Stepak B, Kobielarz M, Gazinska M, Szustakiewicz K, Pezowicz C, Antonczak AJ. ArF-excimer laser as a potential tool for manufacturing of biomedical polymeric devices. EXPRESS POLYM LETT 2021. [DOI: 10.3144/expresspolymlett.2021.64] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Gazińska M, Krokos A, Kobielarz M, Włodarczyk M, Skibińska P, Stępak B, Antończak A, Morawiak M, Płociński P, Rudnicka K. Influence of Hydroxyapatite Surface Functionalization on Thermal and Biological Properties of Poly(l-Lactide)- and Poly(l-Lactide-co-Glycolide)-Based Composites. Int J Mol Sci 2020; 21:ijms21186711. [PMID: 32933206 PMCID: PMC7556045 DOI: 10.3390/ijms21186711] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [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: 07/31/2020] [Revised: 09/04/2020] [Accepted: 09/10/2020] [Indexed: 12/22/2022] Open
Abstract
Novel biocomposites of poly(L-lactide) (PLLA) and poly(l-lactide-co-glycolide) (PLLGA) with 10 wt.% of surface-modified hydroxyapatite particles, designed for applications in bone tissue engineering, are presented in this paper. The surface of hydroxyapatite (HAP) was modified with polyethylene glycol by using l-lysine as a linker molecule. The modification strategy fulfilled two important goals: improvement of the adhesion between the HAP surface and PLLA and PLLGA matrices, and enhancement of the osteological bioactivity of the composites. The surface modifications of HAP were confirmed by attenuated total reflectance-Fourier transform infrared spectroscopy (ATR-FTIR), TGA, and elemental composition analysis. The influence of hydroxyapatite surface functionalization on the thermal and in vitro biological properties of PLLA- and PLLGA-based composites was investigated. Due to HAP modification with polyethylene glycol, the glass transition temperature of PLLA was reduced by about 24.5 °C, and melt and cold crystallization abilities were significantly improved. These achievements were scored based on respective shifting of onset of melt and cold crystallization temperatures and 1.6 times higher melt crystallization enthalpy compared with neat PLLA. The results showed that the surface-modified HAP particles were multifunctional and can act as nucleating agents, plasticizers, and bioactive moieties. Moreover, due to the presented surface modification of HAP, the crystallinity degree of PLLA and PLLGA and the polymorphic form of PLLA, the most important factors affecting mechanical properties and degradation behaviors, can be controlled.
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Affiliation(s)
- Małgorzata Gazińska
- Department of Engineering and Technology of Polymers, Faculty of Chemistry, Wrocław University of Science and Technology, Wyb. Wyspiańskiego 27, 50-370 Wrocław, Poland;
- Correspondence: (M.G.); (A.K.)
| | - Anna Krokos
- Department of Engineering and Technology of Polymers, Faculty of Chemistry, Wrocław University of Science and Technology, Wyb. Wyspiańskiego 27, 50-370 Wrocław, Poland;
- Correspondence: (M.G.); (A.K.)
| | - Magdalena Kobielarz
- Department of Mechanics, Materials and Biomedical Engineering, Faculty of Mechanical Engineering, Wroclaw University of Science and Technology, Wyb. Wyspiańskiego 27, 50-370 Wrocław, Poland;
| | - Marcin Włodarczyk
- Department of Immunology and Infectious Biology, Faculty of Biology and Environmental Protection, University of Łódz, Banacha 12/16, 90-237 Łódź, Poland; (M.W.); (P.S.); (P.P.); (K.R.)
| | - Paulina Skibińska
- Department of Immunology and Infectious Biology, Faculty of Biology and Environmental Protection, University of Łódz, Banacha 12/16, 90-237 Łódź, Poland; (M.W.); (P.S.); (P.P.); (K.R.)
| | - Bogusz Stępak
- Laser and Fibre Electronics Group, Faculty of Electronics, Wrocław University of Science and Technology, Wyb. Wyspiańskiego 27, 50-370 Wrocław, Poland; (B.S.); (A.A.)
| | - Arkadiusz Antończak
- Laser and Fibre Electronics Group, Faculty of Electronics, Wrocław University of Science and Technology, Wyb. Wyspiańskiego 27, 50-370 Wrocław, Poland; (B.S.); (A.A.)
| | - Milena Morawiak
- Department of Engineering and Technology of Polymers, Faculty of Chemistry, Wrocław University of Science and Technology, Wyb. Wyspiańskiego 27, 50-370 Wrocław, Poland;
| | - Przemysław Płociński
- Department of Immunology and Infectious Biology, Faculty of Biology and Environmental Protection, University of Łódz, Banacha 12/16, 90-237 Łódź, Poland; (M.W.); (P.S.); (P.P.); (K.R.)
| | - Karolina Rudnicka
- Department of Immunology and Infectious Biology, Faculty of Biology and Environmental Protection, University of Łódz, Banacha 12/16, 90-237 Łódź, Poland; (M.W.); (P.S.); (P.P.); (K.R.)
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Kobielarz M. Effect of collagen fibres and elastic lamellae content on the mechanical behaviour of abdominal aortic aneurysms. Acta Bioeng Biomech 2020; 22:9-21. [PMID: 33518720] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
PURPOSE The main purpose of this study was a detailed analysis of the mechanical and structural characteristics of human abdominal aneurysms in comparison with normal abdominal aortae and determination of the correlations between their mechanical behaviour and the microstructural content. METHODS Various mechanical properties, i.e., mechanical failure properties, elastic moduli, inflection point coordinates, index of anisotropy and incompressibility were determined under uniaxial loading conditions in the circumferential and axial directions. Constitutive parameters were derived from the commonly used constitutive model proposed by Holzapfel et al. [9]. The microstructural arrangement was examined by histological staining supported by scanning electron microscopy analysis. The content of collagen fibres and elastic lamellae was tested in relation to mechanical properties and constitutive parameters. RESULTS Significant differences were found in the microstructural arrangement and layer composition of the aneurysmal specimens, compared to the normal aorta group. The mechanical properties and constitutive parameters of the aneurysmal specimens were significantly altered, indicating a weakening of the load-bearing properties of the walls of the aneurysms. A comparative analysis discovered significant correlations between structural composition and mechanical parameters, in particular with respect to the number of collagen fibres and failure stress, which can be important for clinical evaluation of abdominal aortic aneurysm (AAA) rupture. CONCLUSIONS Changes in the content of collagen fibres and elastic lamellae correlate with mechanical and constitutive parameters, indicating AAA severity.
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Affiliation(s)
- Magdalena Kobielarz
- Department of Mechanics, Materials and Biomedical Engineering, Faculty of Mechanical Engineering, Wrocław University of Science and Technology, Wrocław, Poland
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Kobielarz M, Tomanik M, Mroczkowska K, Szustakiewicz K, Oryszczak M, Mazur A, Antończak A, Filipiak J. Laser-modified PLGA for implants: in vitro degradation and mechanical properties. Acta Bioeng Biomech 2020; 22:179-197. [PMID: 32756551] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
PURPOSE Irradiations by CO2 laser poly(lactic-co-glycolic acid) surface lead to alterations of physicochemical properties of a copolymer. Effects of PLGA irradiations are results of photochemical and photothermal processes leading to polymer degradation. The scale of the degradation depends on the inducted surface modification. Hence the main goal of presented studies was to define the influence of CO2 laser irradiation with different process parameters, inducing three cases of surface modification, on mechanical properties and topography of PLGA during degradation in the aqueous environment. METHODS Hydrolytic degradation were performed in distilled (demineralized) water. Mechanical properties were conducted in accordance with the PN-EN ISO 527-3:1998 standard. pH of incubating solution, specimens' topography, mass and geometrical dimensions were controlled during process. RESULTS During the hydrolytic degradation, gradual changes in failure mode were observed from ductile failure characteristic for untreated PLGA to brittle failure of incubated PLGA regardless of the case of triggered modification. Tensile strength decreased with degradation time regardless of the case of surface modification with insignificant fluctuation in means Young's moduli. pH for each case decreased and topography od specimens become smoother with incubation time. CONCLUSIONS PLGA surface modification by CO2 laser below the ablation threshold (P1) and at the ablation threshold (P2) leaded to surface functionalization, however, irradiation above the ablation threshold (P3) caused marked degradation of PLGA and accelerated specimens disintegration during incubation in the aquatic environment.
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Affiliation(s)
- Magdalena Kobielarz
- Department of Mechanics, Materials and Biomedical Engineering, Faculty of Mechanical Engineering, Wroclaw University of Science and Technology, Wrocław, Poland
| | - Magdalena Tomanik
- Department of Mechanics, Materials and Biomedical Engineering, Faculty of Mechanical Engineering, Wroclaw University of Science and Technology, Wrocław, Poland
| | - Katarzyna Mroczkowska
- Laser and Fiber Electronics Group, Faculty of Electronics, Wroclaw University of Science and Technology, Wrocław, Poland
| | - Konrad Szustakiewicz
- Polymer Engineering and Technology Division, Faculty of Chemistry, Wroclaw University of Science and Technology, Wrocław, Poland
| | - Magdalena Oryszczak
- Scientific Circle of Biomechanics, Faculty of Mechanical Engineering, Wrocław University of Science and Technology, Wrocław, Poland
| | - Anna Mazur
- Scientific Circle of Biomechanics, Faculty of Mechanical Engineering, Wrocław University of Science and Technology, Wrocław, Poland
| | - Arkadiusz Antończak
- Laser and Fiber Electronics Group, Faculty of Electronics, Wroclaw University of Science and Technology, Wrocław, Poland
| | - Jarosław Filipiak
- Department of Mechanics, Materials and Biomedical Engineering, Faculty of Mechanical Engineering, Wroclaw University of Science and Technology, Wrocław, Poland
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15
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Kobielarz M, Tomanik M, Mroczkowska K, Szustakiewicz K, Oryszczak M, Mazur A, Antończak A, Filipiak J. Laser-modified PLGA for implants: in vitro degradation and mechanical properties. Acta Bioeng Biomech 2020. [DOI: 10.37190/abb-01532-2019-02] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Abstract
Purpose: The main purpose of this study was a detailed analysis of the mechanical and structural characteristics of human abdominal aneurysms in comparison with normal abdominal aortae and determination of the correlations between their mechanical behaviour and the microstructural content. Methods: Various mechanical properties, i.e., mechanical failure properties, elastic moduli, inflection point coordinates, index of anisotropy and incompressibility were determined under uniaxial loading conditions in the circumferential and axial directions. Constitutive parameters were derived from the commonly used constitutive model proposed by Holzapfel et al. [9]. The microstructural arrangement was examined by histological staining supported by scanning electron microscopy analysis. The content of collagen fibres and elastic lamellae was tested in relation to mechanical properties and constitutive parameters. Results: Significant differences were found in the microstructural arrangement and layer composition of the aneurysmal specimens, compared to the normal aorta group. The mechanical properties and constitutive parameters of the aneurysmal specimens were significantly altered, indicating a weakening of the load-bearing properties of the walls of the aneurysms. A comparative analysis discovered significant correlations between structural composition and mechanical parameters, in particular with respect to the number of collagen fibres and failure stress, which can be important for clinical evaluation of abdominal aortic aneurysm (AAA) rupture. Conclusions: Changes in the content of collagen fibres and elastic lamellae correlate with mechanical and constitutive parameters, indicating AAA severity.
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Kobielarz M, Gazińska M, Tomanik M, Stępak B, Szustakiewicz K, Filipiak J, Antończak A, Pezowicz C. Physicochemical and mechanical properties of CO2 laser-modified biodegradable polymers for medical applications. Polym Degrad Stab 2019. [DOI: 10.1016/j.polymdegradstab.2019.05.010] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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Kozuń M, Kobielarz M, Chwiłkowska A, Pezowicz C. The impact of development of atherosclerosis on delamination resistance of the thoracic aortic wall. J Mech Behav Biomed Mater 2018; 79:292-300. [PMID: 29353772 DOI: 10.1016/j.jmbbm.2018.01.009] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2017] [Revised: 12/22/2017] [Accepted: 01/09/2018] [Indexed: 01/30/2023]
Abstract
The aim of this work is to determine the impact of development of atherosclerosis on dissection of the human thoracic aorta on the basis of an analysis of the mechanical properties of the interfaces between its layers. The research material consisted of 17 pathologically unchanged aortae and 74 blood vessels with atherosclerotic lesions, which were classified according to the histological classification by Stary. The subject of the analysis were the interfaces between the adventitia and the media-intima complex (A-MIC) and between the intima and the media-adventitia complex (I-MAC). The mechanical properties of the above interfaces were determined by the peeling test in the longitudinal and circumferential directions. The results indicate that development of atherosclerosis reduces vessel wall resistance to delamination. The greatest risk of dissection occurs at stage IV of the disease. In this case, energy values are lower by about 28% for the I-MAC interface and by 39% for the A-MIC interface compared with normal tissues. Lower values of mean force and energy were obtained for the I-MAC interface, indicating that this interface is more susceptible to delamination. The mechanical properties of the A-MIC interfaces are directional.
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Affiliation(s)
- Marta Kozuń
- Wroclaw University of Science and Technology, Faculty of Mechanical Engineering, Department of Biomedical Engineering, Mechatronics and Theory of Mechanism, Lukasiewicza 7/9, 50-371 Wroclaw, Poland.
| | - Magdalena Kobielarz
- Wroclaw University of Science and Technology, Faculty of Mechanical Engineering, Department of Biomedical Engineering, Mechatronics and Theory of Mechanism, Lukasiewicza 7/9, 50-371 Wroclaw, Poland.
| | - Agnieszka Chwiłkowska
- Wroclaw Medical University, Department of Medical Biochemistry, Chalubinskiego 10, 50-368 Wroclaw, Poland.
| | - Celina Pezowicz
- Wroclaw University of Science and Technology, Faculty of Mechanical Engineering, Department of Biomedical Engineering, Mechatronics and Theory of Mechanism, Lukasiewicza 7/9, 50-371 Wroclaw, Poland.
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Kuzan A, Chwiłkowska A, Pezowicz C, Witkiewicz W, Gamian A, Maksymowicz K, Kobielarz M. The content of collagen type II in human arteries is correlated with the stage of atherosclerosis and calcification foci. Cardiovasc Pathol 2017; 28:21-27. [DOI: 10.1016/j.carpath.2017.02.003] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/28/2016] [Revised: 01/24/2017] [Accepted: 02/08/2017] [Indexed: 10/20/2022] Open
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Kobielarz M, Kozuń M, Kuzan A, Maksymowicz K, Witkiewicz W, Pezowicz C. The intima with early atherosclerotic lesions is load-bearing component of human thoracic aorta. Biocybern Biomed Eng 2017. [DOI: 10.1016/j.bbe.2016.10.008] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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Kobielarz M, Szotek S, Głowacki M, Dawidowicz J, Pezowicz C. Qualitative and quantitative assessment of collagen and elastin in annulus fibrosus of the physiologic and scoliotic intervertebral discs. J Mech Behav Biomed Mater 2016; 62:45-56. [PMID: 27177214 DOI: 10.1016/j.jmbbm.2016.04.033] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [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: 02/02/2016] [Revised: 04/15/2016] [Accepted: 04/25/2016] [Indexed: 02/02/2023]
Abstract
The biophysical properties of the annulus fibrosus of the intervertebral disc are determined by collagen and elastin fibres. The progression of scoliosis is accompanied by a number of pathological changes concerning these structural proteins. This is a major cause of dysfunction of the intervertebral disc. The object of the study were annulus fibrosus samples excised from intervertebral discs of healthy subjects and patients treated surgically for scoliosis in the thoracolumbar or lumbar spine. The research material was subjected to structural analysis by light microscopy and quantitative analysis of the content of collagen types I, II, III and IV as well as elastin by immunoenzymatic test (ELISA). A statistical analysis was conducted to assess the impact of the sampling site (Mann-Whitney test, α=0.05) and scoliosis (Wilcoxon matched pairs test, α=0.05) on the obtained results. The microscopic studies conducted on scoliotic annulus fibrosus showed a significant architectural distortion of collagen and elastin fibres. Quantitative biochemical assays demonstrated region-dependent distribution of only collagen types I and II in the case of healthy intervertebral discs whereas in the case of scoliotic discs region-dependent distribution concerned all examined proteins of the extracellular matrix. Comparison of scoliotic and healthy annulus fibrosus revealed a significant decrease in the content of collagen type I and elastin as well as a slight increase in the proportion of collagen types III and IV. The content of collagen type II did not differ significantly between both groups. The observed anomalies are a manifestation of degenerative changes affecting annulus fibrosus of the intervertebral disc in patients suffering from scoliosis.
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Affiliation(s)
- Magdalena Kobielarz
- Department of Biomedical Engineering, Mechatronics and Theory of Mechanisms, Wroclaw University of Technology, Łukasiewicza 7/9, 50-371 Wroclaw, Poland
| | - Sylwia Szotek
- Department of Biomedical Engineering, Mechatronics and Theory of Mechanisms, Wroclaw University of Technology, Łukasiewicza 7/9, 50-371 Wroclaw, Poland.
| | - Maciej Głowacki
- Department of Paediatric Orthopaedics, Karol Marcinkowski University of Medical Sciences, 28 Czerwca 1956r., 61-545 Poznan, Poland
| | | | - Celina Pezowicz
- Department of Biomedical Engineering, Mechatronics and Theory of Mechanisms, Wroclaw University of Technology, Łukasiewicza 7/9, 50-371 Wroclaw, Poland
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Kobielarz M, Chwiłkowska A, Turek A, Maksymowicz K, Marciniak M. Influence of selective digestion of elastin and collagen on mechanical properties of human aortas. Acta Bioeng Biomech 2015; 17:55-62. [PMID: 26415712] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
PURPOSE There are two families of fibres taking part in the process of mechanical loads transfer, i.e. elastin and collagen fibres. Their number, spatial arrangement and specific properties determine the capacity of a blood vessels to resist mechanical loads resulting from the impact of blood on vessel walls. The purpose of the present paper is to define the load-bearing capacities of elastin and collagen scaffolds equivalent to natural fibre arrangements of human aorta and produced by selective digestion. METHODS Samples of thoracic human aortas were digested by using phosphate buffer of trypsin at pH 8.0 for 22 hours in order to degrade elastin and by autoclaving followed by incubation in 90% formic acid for 22 hours. The efficacy of digestion was assessed immunohistochemically. Mechanical properties of pre-stretched native and digested samples were determined by uniaxial tensile test. RESULTS Samples subjected to autoclaving have been successfully deprived of both types of collagen and elastin has been intact. Treatment with trypsin caused a removal of elastin and the presence of type I and IV collagen was demonstrated. Digestion of aortic samples either by formic acid or trypsin has resulted significantly decreasing mechanical properties in comparison with native samples. CONCLUSIONS Collagen and elastin scaffold-like stuctures have been effectively produced by selective digestion of thoracic human aorta and their contribution to the load-bearing process was evaluated. Isolated collagen network are more durable and stiffer and less deformable than elastin network, hence are responsible for load-bearing process at higher strain since the range of working of elastin is at lower strain values.
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Affiliation(s)
- Magdalena Kobielarz
- Department of Biomedical Engineering, Mechatronics and Theory of Mechanisms, Wroclaw University of Technology, Wrocław, Poland
- Regional Specialist Hospital in Wrocław, Research and Development Centre, Wrocław, Poland
| | | | - Artur Turek
- School of Pharmacy with the Division of Laboratory Medicine in Sosnowiec, Medical University of Silesia, Katowice, Poland, Chair and Department of Biopharmacy, Sosnowiec, Poland
- Centre of Polymer and Carbon Materials, Polish Academy of Sciences, Zabrze, Poland
| | - Krzysztof Maksymowicz
- Department of Forensic Medicine, Medical Faculty, Wrocław Medical University, Wrocław, Poland
| | - Monika Marciniak
- Department of Plastic Forming and Metrology, Wrocław University of Technology, Wrocław, Poland
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Gąsior-Głogowska M, Komorowska M, Hanuza J, Mączka M, Zając A, Ptak M, Będziński R, Kobielarz M, Maksymowicz K, Kuropka P, Szotek S. FT-Raman spectroscopic study of human skin subjected to uniaxial stress. J Mech Behav Biomed Mater 2013; 18:240-52. [DOI: 10.1016/j.jmbbm.2012.11.023] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2012] [Revised: 11/07/2012] [Accepted: 11/28/2012] [Indexed: 10/27/2022]
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Kuzan A, Chwiłkowska A, Kobielarz M, Pezowicz C, Gamian A. Glycation of extracellular matrix proteins and its role in atherosclerosis. ACTA ACUST UNITED AC 2012; 66:804-9. [DOI: 10.5604/17322693.1016359] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Olsztyńska-Janus S, Szymborska-Małek K, Gąsior-Głogowska M, Walski T, Komorowska M, Witkiewicz W, Pezowicz C, Kobielarz M, Szotek S. Spectroscopic techniques in the study of human tissues and their components. Part I: IR spectroscopy. Acta Bioeng Biomech 2012; 14:101-115. [PMID: 23140221] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Among the currently used methods of monitoring human tissues and their components many types of research are distinguished. These include spectroscopic techniques. The advantage of these techniques is the small amount of sample required, the rapid process of recording the spectra, and most importantly in the case of biological samples - preparation of tissues is not required. In this work, vibrational spectroscopy: ATR-FTIR and Raman spectroscopy will be used. Studies are carried out on tissues: tendons, blood vessels, skin, red blood cells and biological components: amino acids, proteins, DNA, plasma, and deposits.
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Affiliation(s)
- Sylwia Olsztyńska-Janus
- Institute of Biomedical Engineering and Instrumentation, Wrocław University of Technology, Poland.
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Olsztyńska-Janus S, Gąsior-Głogowska M, Szymborska-Małek K, Komorowska M, Witkiewicz W, Pezowicz C, Szotek S, Kobielarz M. Spectroscopic techniques in the study of human tissues and their components. Part II: Raman spectroscopy. Acta Bioeng Biomech 2012; 14:121-133. [PMID: 23394147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Among the currently used methods of monitoring human tissues and their components many types of research are distinguished. These include spectroscopic techniques. The advantage of these techniques is the small amount of sample required the rapid process of recording the spectra, and most importantly in the case of biological samples - preparation of tissues is not required. In this work vibrational spectroscopy: ATR-FTIR and Raman spectroscopy will be used. Studies are carried out on tissues: tendons, blood vessels, skin, red blood cells and biological components: amino acids, proteins, DNA, plasma, and deposits.
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Affiliation(s)
- Sylwia Olsztyńska-Janus
- Institute of Biomedical Engineering and Instrumentation, Wrocław University of Technology. Regional Specialist Hospital in Wrocław, Research and Development Centre, Wrocław.
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Kuzan A, Chwiłkowska A, Kobielarz M. [Metabolism of collagen and its role in arteriosclerosis]. Pol Merkur Lekarski 2011; 31:114-117. [PMID: 21936350] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Collagen is one of main structural protein in organism. It plays a fundamental role in a lot of functions crucial for proper functioning connective tissue. The metabolism of the protein-production, modification and degradation should be balanced, in other situation appear serious health consequences, inter alia course of the arteriosclerosis, which is one of the most serious contemporary medical problem in developed countries, might be deteriorated. The collagen is crucial for the atherosclerotic plaque stability, if there is the deficiency of it, the blood vessels are more prone to rupture. On the other hand, accumulation of the protein leads to the arterial stenosis. It is suggested that collagen is involved in the calcification of atherosclerotic areas of the arteries, in binding of low density lipoproteins, stimulation of migration and apoptosis of arterial smooth muscle cells.
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Affiliation(s)
- Aleksandra Kuzan
- Wojewódzki Szpital Specjalistyczny we Wrocławiu, Ośrodek Badawczo-Rozwojowy.
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Wysocki M, Kobus K, Szotek S, Kobielarz M, Kuropka P, Będziński R. Biomechanical effect of rapid mucoperiosteal palatal tissue expansion with the use of osmotic expanders. J Biomech 2011; 44:1313-20. [DOI: 10.1016/j.jbiomech.2011.01.012] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2010] [Revised: 12/31/2010] [Accepted: 01/05/2011] [Indexed: 11/25/2022]
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Zak M, Kuropka P, Kobielarz M, Dudek A, Kaleta-Kuratewicz K, Szotek S. Determination of the mechanical properties of the skin of pig foetuses with respect to its structure. Acta Bioeng Biomech 2011; 13:37-43. [PMID: 21761809] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Skin is an important barrier protecting the organism against external environmental factors. Determination of its mechanical characteristics as regards its structure has significant scientific and application value. In this work, uniaxial tensile tests were conducted to determine the basic mechanical parameters of skin with respect to its structure. The subject of the study were skin samples taken from domestic pig foetuses. They were excised from different parts of body, in the direction parallel to the long axis of the body. Regardless of the sampling site, the tests revealed no significant differences in the values of the maximum tensile strength (2.08 ± 0.25 MPa) and the conventional Young's modulus (5.87 ± 1.52 MPa). The mechanical and structural tests confirmed that regardless of the sampling region the skin of domestic pig foetuses may constitute a human skin substitute model.
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Affiliation(s)
- Małgorzata Zak
- Division of Biomedical Engineering and Experimental Mechanics, Wrocław University of Technology, Poland
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Gąsior-Głogowska M, Komorowska M, Hanuza J, Ptak M, Kobielarz M. Structural alteration of collagen fibres--spectroscopic and mechanical studies. Acta Bioeng Biomech 2010; 12:55-62. [PMID: 21361257] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Fourier Transform Near Infrared Raman Spectroscopy has been used to monitor the molecular changes of collagen in a tendon subjected to strain. In the Raman spectrum of the unstrained tendon, some protein bands, mainly assigned to collagen, can be observed: amide I (1666 cm-1) and III (1266 and 1248 cm-1) vibrational modes and skeletal (C-C) stretching vibrations (816 and 940 cm-1). The position of these bands is changing with the increasing strain values. It is concluded that elastin and non-helical domains of collagen are initially involved in the load transfer and triple helices of collagen are gradually joining this process.
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Affiliation(s)
- Marlena Gąsior-Głogowska
- Institute of Biomedical Engineering and Instrumentation, Wrocław University of Technology, Wrocław, Poland.
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Kania M, Mikołajewska D, Marycz K, Kobielarz M. Effect of diet on mechanical properties of horse's hair. Acta Bioeng Biomech 2009; 11:53-57. [PMID: 20131751] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
The aim of this research was to assess the effect of diet supplementation with zinc and copper, in different chemical forms (organic and inorganic), on the mechanical properties of the hair of healthy English thoroughbred horses. Hairs were taken from 18 horses which had been fed with oats and hay for a period of 110 days. Twelve of the horses had been additionally given a daily dose of 700 g of highquality 44-ingredients Fohlengold St-Hippolyt muesli made by Muhle Ebert Dilheim. Six of them had received the muesli-containing organic zinc and copper (OS), while the other six horses had received the muesli-containing inorganic zinc and copper (IS). The mechanical properties of the hairs before and after the supplementation period were tested in a Synergie 100 (MTS) testing machine. Each of the hairs was loaded at a constant rate of 20 mm/min until rupture. Young modulus (E), breaking stress (Ru) and yield point (Rs) of the particular hairs were determined. No significant changes in the mechanical parameters were observed in the reference group in which the horses were fed with only oats and hay for the whole experimental period of 110 days. The supplementation of the diet with inorganic zinc and copper resulted in an increase in the elasticity and diameter of the hairs and in a simultaneous reduction in their strength. Whereas organic zinc and copper caused an increase in the elasticity and strength of the hairs and a simultaneous reduction in their diameter. It has been shown that the organic form of the supplemented trace zinc and copper (mainly copper) elements has a beneficial effect on the mechanical properties of the hairs since it results in an increase in both their elasticity and strength.
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Affiliation(s)
- Małgorzata Kania
- Interdepartmental Students' Science Group of Biomechanics, Wrocław University of Technology, Poland
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Szotek S, Kobielarz M, Maksymowicz K. Mechanical response of brain to mechanical stimuli--animal model investigation. Neurol Neurochir Pol 2007; 41:525-532. [PMID: 18224575] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
BACKGROUND AND PURPOSE Conventional neurosurgical procedures give surgeons both tactile and visual feedback. Unlike conventional procedures, minimally invasive surgery is devoid of haptic feedback. Incorporation of tactile feedback into neurosurgical robotic systems can greatly enhance the results of minimally invasive procedures. Hence, the ultimate goal of the research presented here is to define the force response of the brain to different types of mechanical stimuli (short- and long-term). The experimental results describe the force responses of brain during indentation tests. MATERIAL AND METHODS Seven ovine head specimens with exposed brain were fixed to an MTS Synergie 100 testing machine using a rigid clamp--metallic frame with sharp-end screws. Four regions were loaded by a hemispherically-ended cylindrical indentor. Each of the indentations applied to the brain was divided into two general stages: insertion and hold which was constant for 180 s. Measurements for the following 3 loading velocities were conducted. The force response of brain to mechanical stimulus was acquired for each case. RESULTS The force response of brain to short-term mechanical stimulus depends on both loading velocities and regions of indentation, whereas the long-term force response depends on the history of loadings. CONCLUSIONS The development of minimally invasive neurosurgical systems requires estimation of the mechanical response of brain to contact with surgical devices. For this reason, investigation of the force response of brain employing different boundary conditions is necessary.
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Affiliation(s)
- Sylwia Szotek
- Division of Biomedical Engineering and Experimental Mechanics, Institute of Machine Design and Operation, Faculty of Mechanical Engineering, Wrocław University of Technology, Wrocław, Poland.
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Szotek S, Będziński R, Kobielarz M, Maksymowicz K, Pielka S, Kuropka P. In-vitro investigation of the physical properties of the skin. J Biomech 2006. [DOI: 10.1016/s0021-9290(06)84598-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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