Aristolochic acid has long been known to have toxic properties, yet certain herbal treatments have included formulations containing Aristolochia species. This example, Dr. Grollman emphasizes, should send a red flag to public wellness officials worldwide. Supporting this warning may be the U.S. Division of Health insurance and Human Services National Toxicology Program’s October 2011 Survey on Carcinogens , which formally classified aristolochic acids as human carcinogens..An SNP is certainly a variation that occurs within an individual nucleotide – the structural products of DNA – within a gene, and generally in most research like this, the genes in which SNP adjustments occur are largely known. Analyses of the various other genetic variants are under way. Related StoriesCHOP experts delay symptoms, expand lifespan in animal model of Batten diseaseResearchers determine inherited gene variation associated with pediatric severe lymphoblastic leukemiaScalable creation of gene therapy vectors: an interview with Frank UbagsThey discovered that for six of the seven variants examined, CLL patients tended to have the variant more regularly than patients without the condition.