rethinkPeptides Search
Menu
Study breakdown

Validation Data for Bradykinin and Substance P Protease Assays Using Capillary Blood and Blood Cards

Methods PaperPreliminary evidence
The takeaway

This companion paper provides validation data confirming that bradykinin and substance P protease activity assays work reliably with capillary blood and dried blood card samples.

Validated across 3 formats

Assay validation confirms reliability for serum, capillary blood, and dried blood cards

What the researchers found

Validation data confirms bradykinin and substance P protease activity assays are reliable when using capillary blood and blood card samples, supporting the protocols described in the companion methods paper.

Why it matters

Validation data is essential for researchers adopting new assay formats. Without it, labs cannot confidently use the simplified sample collection methods for protease activity measurement.

The numbers in context

2 assays validated for 2 alternative sample types

How the study worked

Validation experiments comparing bradykinin and substance P protease assay performance across serum, capillary blood, and dried blood card sample types. Statistical analysis of precision, accuracy, and reproducibility.

Who was studied

Laboratory validation study (no patient population)

What this study cannot tell us

Data paper — focused on assay validation rather than clinical application. Limited to the specific neuropeptide substrates tested.

How to read the evidence

Preliminary — method validation data supporting assay adoption but not a clinical study.

When this study was published

Published in 2020; provides foundation data for ongoing use of these assays.

The bigger picture

Data papers like this enable reproducibility and adoption of new methods across laboratories, which is critical for standardizing biomarker measurements in inflammation research.

Questions still open

  • How stable are neuropeptide protease measurements on dried blood cards over different storage times?
  • Can these validated methods be used in clinical diagnostic settings?
  • What is the minimum blood volume needed for reliable results from capillary samples?

Common questions

Why is a separate validation paper needed?
The main methods paper describes how to run the assays, while this paper provides the statistical data proving they work correctly with different sample types. Labs need both to confidently adopt new methods.
What does protease activity tell researchers?
Proteases are enzymes that break down proteins and peptides. Their activity levels change in inflammation, pain, and disease. Measuring protease activity using neuropeptide reporters provides a window into these biological processes.

Read the original research

Validation data for the use of bradykinin and substance P protease activity assays with capillary blood and blood cards.

Data in brief, 28, 104873

Citation

Schreiber, Ulrich; Bayer, Malte; König, Simone. (2020). Validation data for the use of bradykinin and substance P protease activity assays with capillary blood and blood cards.. Data in brief, 28, 104873. https://doi.org/10.1016/j.dib.2019.104873