Related Experiment Video
Updated: Jun 27, 2026
07:47
A Proteoliposome-Based Efflux Assay to Determine Single-molecule Properties of Cl- Channels and Transporters
Published on: April 20, 2015
[Evaluation of KL-6 CLEIA reagent]
Kozo Morimoto1, Rie Ishikawa, Atsuko Moriya
1Department of Respiratory Medicine, Japanese Red Cross Medical Center.
Summary
A new chemiluminescence immunoassay (CLEIA) offers a rapid and accurate method for measuring KL-6 levels, a key marker for interstitial pneumonia. This automated assay provides reliable results in under an hour, aiding in acute phase diagnosis and patient management.
Area of Science:
- Biochemistry
- Clinical Diagnostics
- Immunology
Context:
- KL-6, a high-molecular-weight sialylated glycoprotein and pulmonary cell antigen, is a crucial biomarker for interstitial pneumonia diagnosis and activity monitoring.
- Accurate and timely assessment of KL-6 is essential for differentiating interstitial pneumonia from other critical conditions like pneumothorax, pulmonary thromboembolism, and heart failure.
Purpose:
- To evaluate a novel chemiluminescence enzyme immunoassay (CLEIA) system for quantifying KL-6 levels using a fully automated analyzer.
- To assess the performance of the new CLEIA assay in terms of speed, accuracy, and correlation with conventional methods, using both plasma and serum samples.
Summary:
- A new automated CLEIA assay for KL-6 was developed and validated.
- The assay demonstrated excellent correlation with conventional kits (r=0.986 for plasma/serum vs. conventional, r=0.997 for serum vs. plasma) and significantly reduced assay time to under 1 hour.
- Master calibration eliminated the need for standard curve preparation, simplifying the process.
Impact:
- This rapid KL-6 assay facilitates quicker diagnosis and management of interstitial pneumonia, especially in acute phases.
- Its utility is highlighted for outpatient examinations and emergency care, improving patient outcomes.
- The assay provides consistent results comparable to existing methods, even in patients undergoing chemotherapy.
Related Concept Videos
01:21Precipitation Titration Curve: Analysis
The precipitation titration curve demonstrates the change in concentration of one reactant with the volume of titrant added. During the titration of chloride ions with silver nitrate, the precipitation titration curve is divided into three regions: before, at, and after the equivalence point. Before the equivalence point, low redissolution of the sparingly soluble silver chloride precipitate gives a low silver ion concentration. However, in the second region, representing the equivalence point,...
01:19Precipitation Titration: Endpoint Detection Methods
In argentometric precipitation titrations, endpoints can be detected visually by the Mohr, Volhard, and Fajans methods. In the Mohr method, adding a soluble chromate indicator gives an initial yellow color to the analyte solution. As the titrant is added, the first excess of silver ions forms a red silver chromate precipitate, marking the endpoint. The solution pH should be maintained at about 8 by adding solid CaCO3.
In the Volhard method, a standard excess of AgNO3 is first added to the...
In the Volhard method, a standard excess of AgNO3 is first added to the...
01:09Ion-Exchange Chromatography
Ion-exchange chromatography, or IEC, is a technique for separating ions based on their affinity for the stationary phase. The stationary phase is a cross-linked polymer resin with covalently attached ionic functional groups. The functional groups can be either positively charged (cation exchangers) or negatively charged (anion exchangers). A cation exchanger consists of a polymeric anion and active cations, while an anion exchanger is a polymeric cation with active anions. The choice of...