Effect of iron poly (sorbitolgluconic acid) complex on urinary cellular excretion

Area of Science:

• Nephrology
• Pharmacology
• Toxicology

Background:

• Iron supplementation is common for various conditions.
• The renal effects of iron complexes require further investigation, especially in patients with pre-existing renal disease.

Purpose of the Study:

• To evaluate the impact of iron poly (sorbitol-gluconic acid) complex on urinary excretion in patients with renal disease and controls.
• To determine if iron complex administration affects urinary cellular and bacterial excretion.

Main Methods:

• Intramuscular injection of iron poly (sorbitol-gluconic acid) complex at 250 mg and 500 g doses.
• Analysis of urinary cellular and bacterial excretion in patients with chronic pyelonephritis, non-infective renal disease, and healthy controls.
• Differential staining technique to identify cell types in urinary sediment.

Main Results:

• A 250 mg dose of iron complex did not alter urinary excretion in any group.
• A 500 g dose significantly increased urinary cellular excretion in patients with chronic infective renal tract disease.
• The increased cells were identified as renal tubular cells, not leukocytes.
• This effect was not observed in control patients or those with non-infective renal disease.

Conclusions:

• High-dose iron poly (sorbitol-gluconic acid) complex may induce renal tubular cell shedding in patients with chronic kidney infections.
• The mechanism may involve a 'toxic' insult from high iron concentrations on susceptible, infection-damaged renal cells.
• Further research is needed to clarify the clinical significance and long-term implications of these findings.