Medium formulation in ricin vaccine

Ricin is a noxious cytotoxin present in castor bean.People have long been pursuing research to understand its functional activities,physical structure and quantitative magnitude in beans etc.In spite of such extensive studies, no effective solution has been formulated to ricin intoxication. However researchers have found vaccine therapy as a promising route to combat the toxin.In ricin vaccinology, the wild toxin has been modified in such a way so that it tends to retain its antigenicity to boost the host defence system but not the toxic activity, called it as “ricin toxoid”.Genetic engineering  is a standardized technique to precisely produce variants in ricin and the candidate with expected property are subsequently chosen.

US scientists have identified an elite ricin toxoid from earlier studies and made an evaluation on vaccine formulation to achieve enhanced antigenicity and stability.Initially they treated the protein in phosphate buffer solution and found structural and functional tolerance in protein after cyclic exposures to extreme temperature ranges.To further improve its adjuvant adherence and related antigenicity, toxoid was treated with aluminium hydroxide adjuvant in succinate buffer and evaluated by differential centrifugation and immuno assays.The results indicated that aluminium hydroxide showed a good compatibility with toxoid by co-sedimentation of protein with gel matrix and also elicited a strong immune response, confirmed by antibody titre studies.Functional confirmation did not seem to be significantly affected by conjugation with adjuvant and Fourier transform infrared spectroscopy was applied to understand it.

Scientists in this study have made a complete profile in ricin vaccine formulation and its influence in conferring active immunity to primitive model systems but the confirmation is to be arrived from human clinical trials as extrapolation of data from mice to humans is difficult .

For reference:”ricin+breakth