Calcium, parathyroids and aging

Area of Science:

• Biochemistry
• Cell Biology
• Gerontology

Background:

• Calcium exhibits a unique distribution in biological systems, maintaining steep extracellular and intracellular concentration gradients.
• Calcium deficiency, exacerbated by aging and disease, leads to a blunting of these gradients, increasing intracellular calcium.
• This disruption impacts cellular function, damage, and death across various pathologies.

Purpose of the Study:

• To investigate the role of calcium distribution in aging and disease.
• To evaluate the effects of calcium supplementation on parathyroid hormone secretion and calcium compartmentalization.
• To assess the clinical benefits of bioavailable calcium in conditions like hypertension and diabetes.

Main Methods:

• Analysis of calcium distribution in hard and soft tissues, and extracellular/intracellular compartments.
• Monitoring parathyroid hormone secretion in response to calcium levels.
• Clinical and laboratory assessments in patients with hypertension and diabetes receiving calcium supplements.

Main Results:

• Aging and disease progressively blunt the calcium concentration gradient between extracellular and intracellular compartments.
• Calcium supplementation, particularly with highly bioavailable forms, suppressed parathyroid hormone secretion.
• This normalization of calcium distribution improved clinical manifestations and laboratory markers in hypertension and diabetes.

Conclusions:

• The intercompartmental distribution of calcium is critical for cellular health and is impaired in aging and disease.
• Active, absorbable calcium supplementation effectively corrects calcium imbalances and suppresses parathyroid hormone.
• Calcium supplementation offers a therapeutic strategy for improving outcomes in conditions characterized by calcium dysregulation.