Details
| Original language | English |
|---|---|
| Pages (from-to) | 420-428 |
| Number of pages | 9 |
| Journal | ANALYST |
| Volume | 143 |
| Issue number | 2 |
| Early online date | 6 Dec 2017 |
| Publication status | Published - 21 Jan 2018 |
Abstract
Cryopreservation can be used for long-term preservation of tissues and organs. It relies on using complex mixtures of cryoprotective agents (CPAs) to reduce the damaging effects of freezing, but care should be taken to avoid toxic effects of CPAs themselves. In order to rationally design cryopreservation strategies for tissues, it is important to precisely determine permeation kinetics of the protectants that are used to ensure maximum permeation, while minimizing the exposure time and toxicity effects. This is particularly challenging with protectant solutions consisting of multiple components each with different physical properties and diffusing at a different rate. In this study, we show that an attenuated total reflection-Fourier transform infrared spectroscopy (ATR-FTIR) setup can be used to simultaneously monitor diffusion of multiple components in a mixture into tissues in real time. Diffusion studies were done with decellularized heart valves using a sucrose-DMSO mixture as well as vitrification solution VS83. To assess diffusion kinetics of different solutes in mixtures, the increase in specific infrared absorbance bands was monitored during diffusion through the tissue. Solute specific wavenumber ranges were selected, and the calculated area was assumed to be proportional to the CPA concentration in the tissue. A diffusion equation based on Fick's second law of diffusion fitted the experimental data quite well, and clear differences in permeation rates were observed among the different mixture components dependent on molecular size and physical properties.
ASJC Scopus subject areas
- Chemistry(all)
- Analytical Chemistry
- Biochemistry, Genetics and Molecular Biology(all)
- Biochemistry
- Environmental Science(all)
- Environmental Chemistry
- Chemistry(all)
- Spectroscopy
- Chemistry(all)
- Electrochemistry
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In: ANALYST, Vol. 143, No. 2, 21.01.2018, p. 420-428.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Simultaneous monitoring of different vitrification solution components permeating into tissues
AU - Vásquez-Rivera, Andrés
AU - Sommer, Kim K.
AU - Oldenhof, Harriëtte
AU - Higgins, Adam Z.
AU - Brockbank, Kelvin G.M.
AU - Hilfiker, Andres
AU - Wolkers, Willem F.
N1 - Publisher Copyright: © 2018 The Royal Society of Chemistry.
PY - 2018/1/21
Y1 - 2018/1/21
N2 - Cryopreservation can be used for long-term preservation of tissues and organs. It relies on using complex mixtures of cryoprotective agents (CPAs) to reduce the damaging effects of freezing, but care should be taken to avoid toxic effects of CPAs themselves. In order to rationally design cryopreservation strategies for tissues, it is important to precisely determine permeation kinetics of the protectants that are used to ensure maximum permeation, while minimizing the exposure time and toxicity effects. This is particularly challenging with protectant solutions consisting of multiple components each with different physical properties and diffusing at a different rate. In this study, we show that an attenuated total reflection-Fourier transform infrared spectroscopy (ATR-FTIR) setup can be used to simultaneously monitor diffusion of multiple components in a mixture into tissues in real time. Diffusion studies were done with decellularized heart valves using a sucrose-DMSO mixture as well as vitrification solution VS83. To assess diffusion kinetics of different solutes in mixtures, the increase in specific infrared absorbance bands was monitored during diffusion through the tissue. Solute specific wavenumber ranges were selected, and the calculated area was assumed to be proportional to the CPA concentration in the tissue. A diffusion equation based on Fick's second law of diffusion fitted the experimental data quite well, and clear differences in permeation rates were observed among the different mixture components dependent on molecular size and physical properties.
AB - Cryopreservation can be used for long-term preservation of tissues and organs. It relies on using complex mixtures of cryoprotective agents (CPAs) to reduce the damaging effects of freezing, but care should be taken to avoid toxic effects of CPAs themselves. In order to rationally design cryopreservation strategies for tissues, it is important to precisely determine permeation kinetics of the protectants that are used to ensure maximum permeation, while minimizing the exposure time and toxicity effects. This is particularly challenging with protectant solutions consisting of multiple components each with different physical properties and diffusing at a different rate. In this study, we show that an attenuated total reflection-Fourier transform infrared spectroscopy (ATR-FTIR) setup can be used to simultaneously monitor diffusion of multiple components in a mixture into tissues in real time. Diffusion studies were done with decellularized heart valves using a sucrose-DMSO mixture as well as vitrification solution VS83. To assess diffusion kinetics of different solutes in mixtures, the increase in specific infrared absorbance bands was monitored during diffusion through the tissue. Solute specific wavenumber ranges were selected, and the calculated area was assumed to be proportional to the CPA concentration in the tissue. A diffusion equation based on Fick's second law of diffusion fitted the experimental data quite well, and clear differences in permeation rates were observed among the different mixture components dependent on molecular size and physical properties.
UR - http://www.scopus.com/inward/record.url?scp=85048454688&partnerID=8YFLogxK
U2 - 10.1039/c7an01576c
DO - 10.1039/c7an01576c
M3 - Article
C2 - 29236110
AN - SCOPUS:85048454688
VL - 143
SP - 420
EP - 428
JO - ANALYST
JF - ANALYST
SN - 0003-2654
IS - 2
ER -