The move from Nephelometry to Immunoturbidimetric Testing
In clinical diagnostics, proteins are part of a wide range of biochemical markers used to identify health and disease in patient samples. Proteins play a key role in the human body, as they are involved in almost every process and can be associated to functions and regulatory pathways that are either signature for disease onset or a target for therapeutic intervention.
There are two main methods used to detect proteins in patient samples; nephelometry and immunoturbidimetry. Nephelometry although traditionally thought to be more sensitive can be expensive due to higher consumable costs. In addition to this nephelometers can be inefficient and are limited by their test menu. Immunoturbidimetric tests are an increasingly accepted alternative to nephelometry for specific protein assays, and studies have shown a close correlation between Randox immunoturbidimetric tests and nephelometry. This particularly lies with the latex enhanced immunoturbidimetry methodology utilised by Randox.
Why the RX series?
Renowned for quality and reliability, the RX series excels in clinical testing combining robust hardware, intuitive software and a world leading test menu featuring routine and novel high performing reagents.
Running specific protein tests on the RX series provides laboratories with a wide range of advantages. The move from nephelometric testing to immunoturbidimetric lowers laboratory costs as nephelometry requires the use of dedicated instruments which are much slower, have higher consumable costs and require highly trained personnel, with the disadvantage of not being able to perform any other type of assay on a single platform.
The RX series improves laboratory efficiencies not just saving costs but also time. Our range of routine clinical chemistry analysers provide users with flexibility and versatility through consolidation of testing onto one single platform.
High Performing and Unique Testing Menu
The RX series of specific protein assays assist in the diagnosis and evaluation of various conditions each with excellent sensitivity and limited inference levels. Randox manufacture immunoturbidimetric kits for the study of a wide range of specific proteins including unique products such as Apolipoprotein C-II, Apolipoprotein C-III, Apolipoprotein E, Cystatin C and Microalbumin.
Most recently the RX series welcomed the addition of Direct HbA1c to our testing panel, available to be run on the RX Daytona +, RX imola and RX modena. If you are interested in running your protein assays on a routine biochemistry analyser, Randox offers a large range of high quality routine and niche protein assays that can be run on most automated analysers.
Click to discover more about our world leading RX series Testing menu or contact us today @theRXseries to find out how we can improve your laboratories testing capabilities.
Immunoturbidimetry methods have become the main technique for performing protein tests. The transition from nephelometry has been cautious but is increasing as laboratories enjoy the comparability and flexibility of immunoturbidimetry.
Immunoturbidimetry and nephelometry both measure the turbidity of a sample to determine the level of an analyte. Upon addition of the assay reagent, antibodies and antigen cluster to form an immune complex that precipitates, increasing the turbidity of the sample. When light is passed through the reaction solution, some light is scattered by the sample, some light is absorbed by the sample and the rest passes through the sample.
Immunoturbidimetry measures the absorbance of the light by the sample, nephelometry measures the light scattered at a fixed angle. The level of analyte is determined by comparison with a calibrator of known concentration.
Immunoturbidimetry is ideal for the detection of proteins, where the analyte concentration is inversely proportional to the transmitted light signal. Historically nephelometry has been more sensitive than conventional immunoturbidimetry. In latex-enhanced immunoturbidimetry, inert microscopic particles enlarge the immune complexes, amplifying the reaction and significantly increasing the sensitivity of the reaction.
Nephelometers are dedicated analysers only capable of performing this type of assay. In addition, they are:
- have high consumable costs
- require highly trained personnel
Immunoturbidimetric tests are carried out on routine biochemistry analysers that are:
- offer longer reagent stability
The main advantage of nephelometry was its sensitivity; however latex-enhanced immunoturbidimetry has closed this gap. Immunoturbidimetric tests are an increasingly accepted alternative to nephelometry for specific protein assays, and studies have shown a close correlation between Randox immunoturbidimetric tests and nephelometry.
If you are interested in running your protein assays on a routine biochemistry analyser, Randox offers a large range of high quality routine and niche protein assays that can be run on most automated analysers, including: Alpha-I acid glycoprotein; alpha-I antitrypsin; anti-streptolysin O; apolipoprotein A-I; apolipoprotein A-II; apolipoprotein B; apolipoprotein C-II; apolipoprotein C-III; apolipoprotein E; ceruloplasmin; complement C3; complement C4; CRP; cystatin C; ferritin; haptoglobin; HbA1c; IgA; IgE; IgG; IgM; lipoprotein (a); microalbumin; myoglobin; rheumatoid factor; transferrin and transthyretin (prealbumin). For more information, download our Reagents Brochure or email: firstname.lastname@example.org.