Qualitative and quantitative comparison of different commercially available 1-84 parathyroid hormone proteins to the WHO international standard 95/646 using orthogonal methods.

J Pharm Biomed Anal

Laboratory for the Analysis of Medicines (LAM), Center for Interdisciplinary Research on Medicines (CIRM), University of Liège, Liège, Belgium. Electronic address:

Published: September 2022

Relative quantitation methods rely on the use of reference substances to determine the content of samples. The aim of this study was to compare 1-84 parathyroid hormone (PTH) standards from different manufacturers to the WHO international standard 95/646. CE and LC with UV detection were investigated as quick and inexpensive quantitation methods, with an emphasis on selectivity between intact 1-84 PTH and its oxidized forms. Both methods were fully validated according to ICH Q2R1. Moreover, method performance was also evaluated according to guidelines defining the maximum allowable measurement uncertainty (MU) of a biological parameter from its intraindividual variation (CV), as well as the proportion of that MU devoted to the reference material. This study highlighted the fact that some 1-84 PTH standards have a content that is actually twice as high as the one stated on the label, which was confirmed by an amino acid analysis investigation. Our approach offers a quick and inexpensive way to estimate the content of 1-84 PTH standards.

Download full-text PDF

Source
http://dx.doi.org/10.1016/j.jpba.2022.114942DOI Listing

Publication Analysis

Top Keywords

pth standards
12
1-84 pth
12
1-84 parathyroid
8
parathyroid hormone
8
international standard
8
standard 95/646
8
quantitation methods
8
quick inexpensive
8
1-84
5
qualitative quantitative
4

Similar Publications

Background: Apart from massive weight loss, metabolic and bariatric surgery, especially gastric bypass (Roux-en-Y gastric bypass [RYGB]), can cause nutritional deficiencies. Proton pump inhibitors (PPI), relatively often used after RYGB, are associated with reduced calcium absorption. We have studied the long-term impact of PPI upon calcium homeostasis among RYGB patients.

View Article and Find Full Text PDF

Biomimetics aims to learn from living systems to develop innovative technical artefacts. As it transcends disciplinary boundaries and needs to integrate both biological and technological knowledge, a domain ontology for biomimetics would be highly desirable. So far, several terminological resources have been designed to support the biomimetic development process.

View Article and Find Full Text PDF

Background: Primary hyperparathyroidism (pHPT) is the third most common endocrine system disorder. Parathyroidectomy (PTx) is the gold standard of care in symptomatic patients. Patients who are not surgical candidates may benefit from percutaneous ethanol ablation, which is a minimally invasive procedure.

View Article and Find Full Text PDF

Accurate measurement of serum parathyroid hormone (PTH) is crucial for diagnosing and managing endocrine and osteological diseases. Conventional immunoassay methods struggle with cross reactivity issues between full-length PTH and truncated fragments or post-translationally modified forms. Both the standardization of PTH assays and the peptide's stability are concerning.

View Article and Find Full Text PDF

This study delves into the impact of precise health management coupled with physical rehabilitation on bone biomarkers in elderly patients with osteoporosis. Two hundred and forty individuals diagnosed with senile osteoporosis were randomly assigned to either the observation group (precision health management group, n = 120) or the control group (routine health management group, n = 120). Patients in the control group received standard health care, while those in the observation group received personalized health care along with physical therapy.

View Article and Find Full Text PDF

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!