A method for curbing the growth of crystals that form cystine kidney stones has been developed by researchers.
Their findings, which appear in the latest issue of the journal
Science, may offer a pathway to a new method for the prevention of kidney stones.
The study was conducted by researchers at New York University's Department of Chemistry and its Molecular Design Institute, NYU School of Medicine, and the Medical College of Wisconsin.
Kidney stones comprised of L-cystine affect at least 20,000 individuals in the United States. This number is substantially smaller than the 10 percent of Americans afflicted by calcium oxalate monohydrate (COM) stones. But L-cystine stones are larger, recur more frequently, and are more likely to cause chronic kidney disease. Current treatments for this disease are somewhat effective, but often lead to adverse side effects.
The formation of L-cystine stones is a consequence of excessive levels of L-cystine in the urine. L-cystine forms into crystals, which aggregate into stones, reaching up to a centimeter in diameter.
Current treatments for L-cystine stone prevention, such as dilution through high fluid intake, can suppress, but may not completely prevent, stone formation. Some medications can react with L-cystine to generate more soluble compounds, but these drugs can cause adverse side effects such as nausea, fever, fatigue, skin allergies, and hypersensitivity.
With the limitations of current treatments in mind, the researchers sought to curb the formation and growth of L-cystine crystals.