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Published on: July 14, 2023
Homoarginine in patients with primary hyperparathyroidism
Andreas Tomaschitz1, Nicolas Verheyen, Martin Gaksch
1Department of Cardiology (AT, NV, BP, EK-K, CC, AS, EB), Medical University of Graz, Graz, Austria; Specialist Clinic for Rehabilitation PV Bad Aussee (AT, JR-M), Bad Aussee, Austria; Medizinische Klinik mit Schwerpunkt Kardiologie (AT, BP, EK-K), Campus Virchow-Klinikum, Charité-Universitaetsmedizin Berlin, Berlin, Germany; Division of Endocrinology and Metabolism, Department of Internal Medicine (MG, CS, KA, AF-P, SP), Medical University of Graz, Graz, Austria; Clinical Institute of Medical and Chemical Laboratory Diagnostics (AM, WM), Medical University of Graz, Graz, Austria; Synlab-Academy (WM), Synlab services LLC, Mannheim, Germany; Medical Clinic V (Nephrology, Hypertensiology, Endocrinology, Diabetology, Rheumatology) (WM), Ruperto Carola University Heidelberg, Medical Faculty Mannheim, Mannheim, Germany; Department of Epidemiology and Biostatistics (AJvB) and EMGO Institute for Health and Care Research, VU University Medical Center, Amsterdam, the Netherlands; and Department of Medicine, Division of Nephrology (ER), University Hospital Heidelberg, Heidelberg, Germany.
Patients with primary hyperparathyroidism (PHPT) have lower levels of the amino acid homoarginine. This finding suggests a potential link between excess parathyroid hormone (PTH) and cardiovascular risk factors.
Area of Science:
- Endocrinology
- Cardiovascular Medicine
- Metabolic Research
Background:
- Low homoarginine and excess parathyroid hormone (PTH) are linked to cardiovascular risks.
- Evidence suggests an interplay between homoarginine and PTH.
- Primary hyperparathyroidism (PHPT) is characterized by excess PTH.
Purpose of the Study:
- To investigate circulating homoarginine levels in patients with and without PHPT.
- To explore the relationship between PHPT and homoarginine concentrations.
- To determine if PHPT is associated with altered homoarginine levels.
Main Methods:
- Cross-sectional analysis of serum homoarginine.
- Comparison between 59 PHPT patients and 92 matched controls.
- Adjustment for confounders including kidney function and vitamin D status.
Main Results:
- PHPT patients had significantly lower serum homoarginine levels than controls (P < 0.001).
- This difference persisted after adjusting for multiple confounders.
- No significant differences were observed in 25-hydroxyvitamin D, albumin, or hemoglobin levels.
Conclusions:
- Patients with PHPT exhibit reduced homoarginine levels.
- This association is independent of age, sex, kidney function, and 25(OH)D status.
- Further research is needed to clarify if low homoarginine contributes to cardiovascular risk in PHPT.
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