Effect of dietary pristane and other saturated mineral oils (MOSH) on autoimmune arthritis in rats

Publication date: Available online 16 February 2017 Source:Toxicology Reports Author(s): Monica Andreassen, Hege Hjertholm, Jean-Pierre Cravedi, Koni Grob, Jan Alexander, Unni C. Nygaard Pristane and other adjuvants based on mineral oil saturated hydrocarbons (MOSH) may induce autoimmunity in rodents after intradermal injection; however there is a lack of information on immune effects after oral MOSH exposure. The aim of our study was to determine the impact of dietary exposure to pristane and other MOSH on the development of autoimmune arthritis. Dark Agouti (DA) rats were given feed containing 4000mg/kg pristane or a broad MOSH mixture in various concentrations (0- 4000mg/kg) for 90 days, or a single intradermal injection of 200μl pristane (positive control). Arthritis scores, and serum and splenocyte markers previously associated with arthritis development, were determined. All rats injected with pristane displayed arthritis symptoms and higher levels of certain serum markers. None of the rats fed pristane or MOSH developed arthritis symptoms or demonstrated clear changes in any measured arthritis-associated biological markers in serum or splenocytes. The absence of clinical arthritis symptoms or any increase in common arthritis-associated biological markers in sera and spleen following dietary exposure to pristane or a broad MOSH mixture in a sub-chronic rat model of arthritis suggest that dietary MOSH have low capacity to promote development of autoimmunity.
Source: Toxicology Reports - Category: Toxicology Source Type: research