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Comparative Analysis of Human Growth Hormone in Serum Using SPRi, Nano-SPRi and ELISA Assays

Comparative Analysis of Human Growth Hormone in Serum Using SPRi, Nano-SPRi and ELISA Assays

Published on: January 7, 2016

Growth hormone assays: current methodologies and their limitations.

Martin Bidlingmaier¹, Christian J Strasburger

¹Endocrine Research Laboratories, Medizinische Klinik-Innenstadt, Ludwig-Maximilians University, Ziemssenstr. 1, 80336 Munich, Germany. martin.bidlingmaier@med.uni-muenchen.de

|April 13, 2007

Summary

Accurate measurement of circulating growth hormone (GH) is crucial for diagnosing GH disorders. However, current GH assay methods lack standardization, leading to inconsistent results and hindering clinical practice.

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Area of Science:

Endocrinology
Clinical Chemistry
Assay Development

Background:

Circulating growth hormone (GH) measurement is vital for diagnosing GH deficiency and excess.
Immunoassays have advanced from radioactive methods to sensitive chemiluminescence techniques.
Despite technological evolution, GH assay results lack inter-method agreement.

Purpose of the Study:

To review current growth hormone (GH) assays used in clinical practice.
To highlight the limitations and challenges in GH assay standardization.
To discuss potential future directions for improving GH assay accuracy.

Main Methods:

Review of existing literature on growth hormone (GH) immunoassays.
Analysis of technological advancements in GH measurement methodologies.

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Examination of factors contributing to assay variability and standardization challenges.

Main Results:

Modern GH assays, particularly those using monoclonal antibodies, show increased variability.
Patient sample GH values depend heavily on the specific laboratory assay used.
Standardization is complicated by analyte heterogeneity, calibration differences, and interfering substances like GH binding protein and GH receptor antagonists.

Conclusions:

Current GH assay methods present significant standardization challenges.
The lack of agreement among assays limits the application of clinical guidelines.
Further efforts are needed to achieve reliable and standardized GH measurements for improved patient care.