How Heavy Metals Increase Heart Disease and Hypertension Risk
Friday, June 15th, 2007
A review article published in the peer-reviewed journal Alternative Therapies in Health and Medicine summarizes the impact of heavy metals mercury and cadmium on the vascular system.
The overall vascular effects of mercury include oxidative stress, inflammation, thrombosis, vascular smooth muscle dysfunction, endothelial dysfunction, dyslipidemia [high LDL cholesterol, low HDL, high triglycerides], immune dysfunction, and mitochondrial dysfunction. The clinical consequences of mercury toxicity include hypertension, CHD [coronary heart disease], MI [myocardial infarction], increased carotid IMT and obstruction, CVA, generalized atherosclerosis, and renal dysfunction with proteinuria …
… Cadmium concentrates in the kidney, particularly inducing proteinuria and renal dysfunction; it is associated with hypertension, but less so with CHD. Renal cadmium reduces CYP4A11 and PPARs, which may be related to hypertension, sodium retention, glucose intolerance, dyslipidemia, and zinc deficiency.
More on Mechanisms
There are several primary ways in which heavy metal exposure may increase the risk for vascular disease:
Increased Oxidative Stress - Mercury and cadmium have high affinity for molecules that contain sulfhydryl groups (-SH), including several sulfur-containing antioxidants, such as N-acetyl cysteine (NAC), alpha-lipoic acid, and glutathione. As a result, when the body is exposed to these heavy metals, antioxidant function is compromised and oxidative stress increases.
