| 1. |
- Siart, Benjamin, et al.
(author)
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Measurements ofinflammation protein biomarkers in venous plasma, earlobe capillary plasma andin capillary plasma stored on filter paper
- 2017
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In: Cytokine. - 1043-4666 .- 1096-0023.
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Journal article (other academic/artistic)abstract
- Multiplex panels for protein biomarkers are increasingly used to analyze blood samples in various fields of clinical research. However, they are rarely used in studies performed outside of a clinical setting. This may in part be due to the relative invasiveness of drawing blood from the vein and because of problems associated with the separation and transport of plasma. Samples collected from the earlobe would be less invasive and could be collected more conveniently. Transportation and storage of such samples could be made easier by blotting plasma on filter paper as dried plasma spots (DPS). The objective of this study was to compare values of multiple protein biomarkers for inflammation measured from three different sources (1) venous plasma, (2) plasma derived from capillary blood from the earlobe and (3) from capillary plasma stored as DPS. Samples from twelve male individuals were assessed with a panel of 92 inflammation related proteins using multiplex proximity extension assay technology. Correlations between the three sample types varied greatly between analytes. In general, a high correlation was observed between capillary plasma and DPS, with 33 analytes showing a correlation value of ρ > 0.8 in the two sample types. At this level of correlation (ρ > 0.8) 14 analytes correlated between venous and capillary plasma in contrast to only six analytes in the comparison of venous blood with DPS. We conclude that collecting samples from the earlobe is a feasible and less invasive alternative to venipuncture, but that the comparability with measures obtained from venous samples varies greatly between proteins.
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| 2. |
- Siart, Benjamin, et al.
(author)
-
Protein measurements in venous plasma, earlobe capillary plasma and in plasma stored on filter paper
- 2019
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In: Analytical Biochemistry. - : ACADEMIC PRESS INC ELSEVIER SCIENCE. - 0003-2697 .- 1096-0309. ; 566, s. 146-150
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Journal article (peer-reviewed)abstract
- In this study, levels of inflammatory protein biomarkers in venous plasma, plasma derived from capillary blood from the earlobe, and capillary plasma stored as dried plasma spots (DPS) were compared. Samples from 12 male individuals were assessed with a panel of 92 inflammation-related proteins using multiplex proximity extension assay. Correlations between sample types varied greatly between analytes. A high correlation of rho > 0.8 was observed between capillary plasma and DPS for 32 analytes. At this level of correlation, 13 analytes correlated between venous and capillary plasma and 5 analytes in the comparison of venous blood with DPS.
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