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Isolation and Characterization of Steroids of Nutraceutical Value in Physalis minima
Laxmi N. Misra,Pyare Lal,Devinder Kumar 한국식품영양과학회 2006 Preventive Nutrition and Food Science Vol.11 No.2
There is great demand of nutraceutical secondary metabolites in the world so as to feed the population by improving agricultural production with new varieties of food crops but what is still more important is to add nutrition into the food. Physalis minima, plant of Solanaceae family, contain certain secondary metabolites which enhance the over all metabolic functions of the body. Withasteroids are one of such phytochemicals that are generally regarded as safe. These chemicals are almost monopoly of the plants of Solanaceae. The leaves, stem and roots of P. minima have been examined to yield several steroids, identification of which has been discussed in this paper. These withasteroids contribute to the potential nutraceutical and health function value since incorporation of withanolides in the diet may prevent or decrease the growth of tumors in humans.
Isolation and Characterization of Steroids of Nutraceutical Value in Physalis minima
Misra Laxmi N.,Lal Pyare,Kumar Devinder The Korean Society of Food Science and Nutrition 2006 Preventive Nutrition and Food Science Vol.11 No.2
There is great demand of nutraceutical secondary metabolites in the world so as to feed the population by improving agricultural production with new varieties of food crops but what is still more important is to add nutrition into the food. Physalis minima, plant of Solanaceae family, contain certain secondary metabolites which enhance the over all metabolic functions of the body. Withasteroids are one of such phytochemicals that are generally regarded as safe. These chemicals are almost monopoly of the plants of Solanaceae. The leaves, stem and roots of P. minima have been examined to yield several steroids, identification of which has been discussed in this paper. These withasteroids contribute to the potential nutraceutical and health function value since incorporation of withanolides in the diet may prevent or decrease the growth of tumors in humans.
Biotransformation of withanolides by cell suspension cultures of Withania somnifera (Dunal)
Sabir, Farzana,Sangwan, Rajender S.,Singh, Jyoti,Misra, Laxmi N.,Pathak, Neelam,Sangwan, Neelam S. The Korean Society of Plant Biotechnology 2011 Plant biotechnology reports Vol.5 No.2
The biotransformation potential of cell suspension cultures generated from Withania somnifera leaf was investigated, using withanolides, i.e. withanolide A, withaferin A, and withanone as precursor substrates. Interestingly, the cell suspension cultures showed inter-conversion of withanolides, as well converted to some unknown compounds, released to the culture media. The bio-catalyzed withanolide was detected and quantified by TLC and HPLC, respectively. There is noticeable conversion of withanolide A to withanone, and vice versa though at a lower level. The type of reaction of this biotransformation appears to be substitution of 20-OH group to 17-OH in withanolide A. In this paper, we present for the first time the possibility of biotransformation by inter-conversion of withanolides of pharmacological importance through cell suspension culture of W. somnifera. The possible role of putative cytochrome $P_{450}$ hydroxylases is implicated in the conversion.