Introduction:

Most uremic toxins are by-products of protein metabolism by action of intestinal flora. The metabolism of aromatic amino acids originates phenolic type residues. The most studied is p-cresol that is associated with renal function and vascular damage. Bisphenol A (BPA) is an exogenous molecule with characteristics similar to these aromatic uremic toxins. BPA is an estrogenic endocrine disruptor, found in tin cans, plastic bottles, epoxy resins and in some dialyzers. This molecule accumulates in patients who have impaired renal function. Observational studies have shown that exposure of BPA is linked to renal and cardiovascular injury, among many others in humans, and in animal studies a causal link has been described. Kidneys with normal renal function rapidly excrete BPA, but insufficient excretion in patients with CKD results in accumulation of BPA in the body.

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