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Rapid calcification propensity testing in blood using a temperature controlled microfluidic polymer chip
Phosphate toxicity is a major threat to cardiovascular health in chronic kidney disease. It is associated with oxidative stress, inflammation and the accumulation of calcium phosphate commonly known as calcification in soft tissues leading to functional disorders of blood vessels. An improved calcif...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Public Library of Science
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7138308/ https://www.ncbi.nlm.nih.gov/pubmed/32255786 http://dx.doi.org/10.1371/journal.pone.0230493 |
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author | Bavendiek, Julia Maurer, Philip Gräber, Steffen Pasch, Andreas Schomburg, Werner Karl Jahnen-Dechent, Willi |
author_facet | Bavendiek, Julia Maurer, Philip Gräber, Steffen Pasch, Andreas Schomburg, Werner Karl Jahnen-Dechent, Willi |
author_sort | Bavendiek, Julia |
collection | PubMed |
description | Phosphate toxicity is a major threat to cardiovascular health in chronic kidney disease. It is associated with oxidative stress, inflammation and the accumulation of calcium phosphate commonly known as calcification in soft tissues leading to functional disorders of blood vessels. An improved calcification propensity test for the assessment of phosphate toxicity was developed, which measures the velocity of calcium phosphate mineralization from colloidal precursors in vitro. This so called T50 test measures the transformation from a primary into a secondary form of nanosized colloidal plasma protein-calcium phosphate particles known as calciprotein particles. The T50 test in its previous form required a temperature controlled nephelometer and several hours of continuous measurement, which precluded rapid bed side testing. We miniaturized the test using microfluidic polymer chips produced by ultrasonic hot embossing. A cartridge holder contained a laser diode for illumination, light dependent resistor for detection and a Peltier element for thermo control. Increasing the assay temperature from 37°C to 75°C reduced the T50 test time 36-fold from 381 ± 10 min at 37°C to 10.5 ± 0.3 min at 75°C. Incorporating sputtered micro mirrors into the chip design increased the effective light path length, and improved signal-to-noise ratio 9-fold. The speed and reproducibility of the T50 chip-based assay run at 75°C suggest that it may be suitable for rapid measurements, preferably in-line in a dialyser or in a portable microfluidic analytic device with the chip inserted as a disposable cartridge. |
format | Online Article Text |
id | pubmed-7138308 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | Public Library of Science |
record_format | MEDLINE/PubMed |
spelling | pubmed-71383082020-04-09 Rapid calcification propensity testing in blood using a temperature controlled microfluidic polymer chip Bavendiek, Julia Maurer, Philip Gräber, Steffen Pasch, Andreas Schomburg, Werner Karl Jahnen-Dechent, Willi PLoS One Research Article Phosphate toxicity is a major threat to cardiovascular health in chronic kidney disease. It is associated with oxidative stress, inflammation and the accumulation of calcium phosphate commonly known as calcification in soft tissues leading to functional disorders of blood vessels. An improved calcification propensity test for the assessment of phosphate toxicity was developed, which measures the velocity of calcium phosphate mineralization from colloidal precursors in vitro. This so called T50 test measures the transformation from a primary into a secondary form of nanosized colloidal plasma protein-calcium phosphate particles known as calciprotein particles. The T50 test in its previous form required a temperature controlled nephelometer and several hours of continuous measurement, which precluded rapid bed side testing. We miniaturized the test using microfluidic polymer chips produced by ultrasonic hot embossing. A cartridge holder contained a laser diode for illumination, light dependent resistor for detection and a Peltier element for thermo control. Increasing the assay temperature from 37°C to 75°C reduced the T50 test time 36-fold from 381 ± 10 min at 37°C to 10.5 ± 0.3 min at 75°C. Incorporating sputtered micro mirrors into the chip design increased the effective light path length, and improved signal-to-noise ratio 9-fold. The speed and reproducibility of the T50 chip-based assay run at 75°C suggest that it may be suitable for rapid measurements, preferably in-line in a dialyser or in a portable microfluidic analytic device with the chip inserted as a disposable cartridge. Public Library of Science 2020-04-07 /pmc/articles/PMC7138308/ /pubmed/32255786 http://dx.doi.org/10.1371/journal.pone.0230493 Text en © 2020 Bavendiek et al http://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. |
spellingShingle | Research Article Bavendiek, Julia Maurer, Philip Gräber, Steffen Pasch, Andreas Schomburg, Werner Karl Jahnen-Dechent, Willi Rapid calcification propensity testing in blood using a temperature controlled microfluidic polymer chip |
title | Rapid calcification propensity testing in blood using a temperature controlled microfluidic polymer chip |
title_full | Rapid calcification propensity testing in blood using a temperature controlled microfluidic polymer chip |
title_fullStr | Rapid calcification propensity testing in blood using a temperature controlled microfluidic polymer chip |
title_full_unstemmed | Rapid calcification propensity testing in blood using a temperature controlled microfluidic polymer chip |
title_short | Rapid calcification propensity testing in blood using a temperature controlled microfluidic polymer chip |
title_sort | rapid calcification propensity testing in blood using a temperature controlled microfluidic polymer chip |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7138308/ https://www.ncbi.nlm.nih.gov/pubmed/32255786 http://dx.doi.org/10.1371/journal.pone.0230493 |
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