Novel inflammatory biomarkers in primary hyperparathyroidism.

Area of Science:

• Endocrinology
• Immunology
• Cardiovascular Disease Research

Background:

• Primary hyperparathyroidism (PHPT) is associated with low-grade inflammation and increased cardiovascular disease (CVD) risk.
• Previous research suggests a link between PHPT and inflammatory processes, but specific systemic pro-inflammatory proteins require further investigation.

Purpose of the Study:

• To investigate systemic levels of previously unexamined pro-inflammatory proteins (MMP9, S100A4, S100A8/A9, sCD14, RAGE) in patients with PHPT.
• To assess changes in these inflammatory markers following parathyroidectomy and normalization of serum calcium levels.

Main Methods:

• A prospective study involving 57 patients with PHPT and 20 healthy controls.
• A longitudinal follow-up of 42 PHPT patients for 6 months post-parathyroidectomy, with blood samples collected at intervals.

Main Results:

• Patients with PHPT exhibited significantly higher serum levels of MMP9, S100A4, and sCD14 compared to controls.
• Over 6 months post-surgery, serum levels of S100A4 and sCD14 decreased significantly, while MMP9 levels showed a further increase.

Conclusions:

• Elevated MMP9, S100A4, and sCD14 indicate an increased systemic inflammatory response in PHPT patients.
• Parathyroidectomy led to a partial reversal of systemic inflammation, evidenced by decreasing S100A4 and sCD14 levels.
• The continued rise in MMP9 post-surgery may be related to tissue repair processes.