Effects of dietary supplementation with butylated hydroxyanisole, cysteine, and vitamins B on tansy ragwort (Senecio jacobaea) toxicosis in ponies.

This study investigates the impact of dietary supplements on the toxicity of tansy ragwort, a plant toxic to ponies. Unfortunately, the additive combination of butylated hydroxyanisole, cysteine, and vitamins B did not alter the toxicity levels or liver damage caused by the plant.

Detailed Explanation of the Research

• The research involved feeding dried tansy ragwort, a plant known to contain toxic compounds known as pyrrolizidine alkaloids, as part of a complete diet for ponies. For their investigation, the researchers examined two groups of animals; one set of ponies was given the ragwort diet with additional dietary supplements, while the other without.
• The dietary supplementation that was used consisted of a mixture of cysteine (1% of the diet), butylated hydroxyanisole (0.75% of the diet), vitamin B12 (200 micrograms per Kg of feed), and folic acid (5mg per Kg of feed). These substances were chosen because of their potential to combat this type of toxicity.
• To measure the toxicity of tansy ragwort, the researchers used various indicators such as survival time, liver changes, sulfobromophthalein (BSP) clearance rate, serum gamma-glutamyl transpeptidase activity, and plasma amino acid patterns. BSP clearance rate, in particular, was regarded as a sensitive marker of liver damage in ponies.
• The study found that the dietary additives did not significantly alter the toxic effects of tansy ragwort. The BSP clearance rate, indicating the liver’s ability to rid itself of toxins, declined to about 20% of normal levels. There was some variability in gamma-glutamyl transpeptidase activities, but these generally increased in animals that consumed tansy ragwort implying liver damage as this enzyme level increases only in the case of liver injury.
• Furthermore, liver iron and copper concentrations increased, while liver zinc levels decreased in ponies that ingested tansy ragwort. This imbalance in essential minerals could potentially contribute to the toxic effects.
• The research also noted that plasma amino acid patterns in ponies fed tansy ragwort underwent changes typical of those observed in liver disease, reinforcing the evidence of liver damage.
• Overall, the research concludes that the mixture of dietary additives tested did not mitigate the toxicity or liver damage caused by tansy ragwort in ponies. This highlights the need for other strategies to prevent and manage tansy ragwort poisoning in these animals.