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Marzec E, Pięta P, Olszewski J. Dielectric properties of the non-glycated and in vitro methylglyoxal-glycated cornea of the rabbit eye. Bioelectrochemistry 2023; 150:108333. [PMID: 36463591 DOI: 10.1016/j.bioelechem.2022.108333] [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: 06/11/2022] [Revised: 11/21/2022] [Accepted: 11/27/2022] [Indexed: 12/02/2022]
Abstract
The dielectric properties of the non-glycated and in vitro methylglyoxal-glycated cornea of the rabbit eye were tested in the frequency range of 200 Hz to 100 kHz of the electric field and at temperatures of 25 to 140 °C. The denaturation temperature (Td) for the non-glycated cornea and the non-enzymatically glycated cornea are approximately 45 and 55 °C, respectively. The mechanism of proton conduction up to Td in a glycated cornea requires more energy, i.e. more than twice the activation energy (ΔH) than in non-glycated tissue. The dielectric spectra for both examined tissues showed the same characteristic frequency of about 7 kHz assigned to the orientation relaxation time of the polar side groups inside the corneal stroma. These results may be useful in the surgical treatment of the cornea using conductive keratoplasty and in tissue engineering for clinical applications to regenerate this tissue. The medical use of these physico-biological techniques is important because the human cornea protects all eye tissues from various environmental factors.
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Affiliation(s)
- E Marzec
- Department of Bionics and Experimental Medical Biology, Poznan University of Medical Sciences, Parkowa 2, 60-775 Poznań, Poland.
| | - P Pięta
- Department of Bionics and Experimental Medical Biology, Poznan University of Medical Sciences, Parkowa 2, 60-775 Poznań, Poland
| | - J Olszewski
- Department of Bionics and Experimental Medical Biology, Poznan University of Medical Sciences, Parkowa 2, 60-775 Poznań, Poland
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Dielectric properties of healthy and diabetic alloxan-induced lenses in rabbits. Bioelectrochemistry 2020; 135:107583. [DOI: 10.1016/j.bioelechem.2020.107583] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2020] [Revised: 06/03/2020] [Accepted: 06/03/2020] [Indexed: 12/29/2022]
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Marzec E, Pietrucha K. Selecting the correct scaffold model for assessing of the dielectric response of collagen-based biomaterials. Colloids Surf B Biointerfaces 2018; 171:506-513. [DOI: 10.1016/j.colsurfb.2018.07.069] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2018] [Revised: 07/17/2018] [Accepted: 07/30/2018] [Indexed: 12/24/2022]
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Marzec E, Pietrucha K. Efficacy evaluation of electric field frequency and temperature on dielectric properties of collagen cross-linked by glutaraldehyde. Colloids Surf B Biointerfaces 2017; 162:345-350. [PMID: 29227920 DOI: 10.1016/j.colsurfb.2017.12.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2017] [Revised: 10/31/2017] [Accepted: 12/05/2017] [Indexed: 01/11/2023]
Abstract
Solid-state dielectric properties are reported for unmodified collagen (Col) and glutaraldehyde-modified collagen (Col-GA) over the frequency range from 100Hz to 100kHz and at temperatures from 25 to 145°C. In the full temperature and frequency range the average values of the relative permittivity and dielectric loss for Col samples are higher than those recorded for Col-GA samples. The peak temperature of these both parameters associated with the release of loosely bound water is around 73 and 77°C for Col and Col-GA samples, respectively. The activation energy for the reorientation and breaking of hydrogen bonds takes the values 32kJmol-1 for Col and 23kJmol-1 for Col-GA. The relative permittivity decrement and conductivity increment of Col-GA samples fall by 40 and 30% on average in the temperature range 25-75°C, as compared to Col samples. Dielectric properties of Col-GA may be helpful in designing scaffolds for tissue engineering.
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Affiliation(s)
- Ewa Marzec
- Department of Bionics and Bioimpedance, University of Medical Sciences, Parkowa 2 60-775 Poznań, Poland.
| | - Krystyna Pietrucha
- Department of Material and Commodity Sciences and Textile Metrology, Lodz University of Technology, Poland
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Marzec E, Olszewski J, Kaczmarczyk J, Richter M, Trzeciak T, Nowocień K, Malak R, Samborski W. Dielectric study of interaction of water with normal and osteoarthritis femoral condyle cartilage. Bioelectrochemistry 2016; 110:32-40. [PMID: 27015448 DOI: 10.1016/j.bioelechem.2016.03.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2015] [Revised: 02/26/2016] [Accepted: 03/13/2016] [Indexed: 12/23/2022]
Abstract
The main goal of this paper is the in vitro study of healthy and osteoarthritis (OA) human cartilage using the dielectric spectroscopy in the alpha-dispersion region of the electric field and in the temperatures from 25 to 140°C. The activation energy of conductivity needed to break the bonds formed by water in the extracellular matrix takes the average values of 61kJ/mol and 44kJ/mol for the control and OA cartilages, respectively. At 28°C, the small difference appears in the permittivity decrement between the control and OA cartilages, while the conductivity increment is about 2 times higher for the control tissue than that for the OA tissue. At 75°C, the conductivity increment for both of these samples is 8 times higher than their respective permittivity decrement. In addition, at 140°C the values of these both parameters for the OA tissue decrease by 8 times as compared to those recorded for the control sample. The relaxation frequency of about 10kHz is similar for both of these samples. The knowledge on dielectric properties of healthy and OA cartilage may prove relevant to tissue engineering focused on the repair of cartilage lesions via the layered structure designing.
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Affiliation(s)
- E Marzec
- Department of Bionics and Bioimpedance, University of Medical Sciences, Parkowa 2, 60-775 Poznań, Poland.
| | - J Olszewski
- Department of Bionics and Bioimpedance, University of Medical Sciences, Parkowa 2, 60-775 Poznań, Poland
| | - J Kaczmarczyk
- Department of Orthopedics and Traumatology, University of Medical Sciences, 28 Czerwca 1956r., 135/147, 60-545 Poznań, Poland
| | - M Richter
- Department of Orthopedics and Traumatology, University of Medical Sciences, 28 Czerwca 1956r., 135/147, 60-545 Poznań, Poland
| | - T Trzeciak
- Department of Orthopedics and Traumatology, University of Medical Sciences, 28 Czerwca 1956r., 135/147, 60-545 Poznań, Poland
| | - K Nowocień
- Department of Orthopedics and Traumatology, University of Medical Sciences, 28 Czerwca 1956r., 135/147, 60-545 Poznań, Poland
| | - R Malak
- Department of Rheumatology and Rehabilitation, University of Medical Sciences, 28 Czerwca 1956r., 135/147, 60-545 Poznań, Poland
| | - W Samborski
- Department of Rheumatology and Rehabilitation, University of Medical Sciences, 28 Czerwca 1956r., 135/147, 60-545 Poznań, Poland
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