Plants estrogens

Livingston, AL. 1978. Forage plant estrogens. J Toxicol Environ Health 4 301. 

Shutt, D. A. (1976). The effects of plant estrogens on animal reproduction. Endeavour 35, 110-113. 

Pettersson, H. and Kiessling, K.H. 1984. Liquid chromatography determination of the plant estrogens coumestrol and isoflavones in animal feed. J. Assoc. Off. Anal. Chem. 67 503-506. 

The existence of secondary metabolites that may fortuitously bind to proteins in the human body may also be illustrated in the nutrition field. Some recent research has investigated plant estrogens, molecules that may have hormonal activity in humans, despite the fact that they have no similar role in the plant. Thus, chance interactions of external molecules with human proteins is a major topic of consideration in all of biological sciences. 

A very thorough study of the solvent acid acidity dependence of the absorption and fluorescence of the plant estrogen coumestrol (22), has been made by Wolfbeis and Schaffner. In aqueous solution, five different species (dianion dication) can be involved. Other related compounds have also been examined. The yellow-green luminescence from quercetin and 3-hydroxyflavone at room temperature has... 

Plant estrogens and metabolites of these compounds that have been excreted by animals have been fractionated on dextran gel columns (Nilsson, 1962). Gel filtration has been used in an investigation of polyphenols from brewery wort (Woof, 1962). The catecholamines adrenalin and noradrenalin can be separated from plasma proteins on Sephadex (Marshall, 1963). Various constituents of Staphylococcus aureus have been separated on Sephadex, namely, teichoic acid, D-alanine, N-acetylglucos-amine, and N-acetylglucosaminylribitol (Sanderson et al., 1962). 

Isoflavones may be found in small amounts in soy-based infant formulas [10]. Isoflavones are found in whole soybeans and products including tofu, tempeh, and soy milk. Isoflavones are classified as both phytoestrogens (plant estrogens) and selective estrogen receptor modnlators. The phytoestrogenic effects of isoflavones have led to the use of soy foods and isoflavone supplements as alternatives to conventional hormone therapy. However, studies have found no long-term complications associated with isoflavones in infants fed soy-based formulas [10,17]. 

Mirestrol. miroestmt a potent plant estrogen from the tubers of Pueraria mirifica found in Thailand. The tubers of the plant are known in folk medidne for their rejuvenating and oral contraceptive properties. [N.E.Taylor et al. J. Chem. Soc (1960) 3685 M.CL. Kashemsanta et al. Ken/ Bull. (1952) 549]... 

It might suggest that their presence in urines might express the marked contraceptive effect of equol (49) on the reproductive capability of animals after the ingestion of plants rich in plant-estrogens or their precursors, and additionally be also beneficial for the effects of clinically and biochemically imexplained infertility or menstrual-cycle disorders [72]. 

Bedell S, Nachtigall M, Naftolin F. The pros and cons of plant estrogens for menopause. / Steroid Biochem Mol Biol. 2014 139 225-236. 

Adams, N.R. (1983). Sexual-behavior of ewes with clover disease treated repeated with estradiol benzoate or testosterone propionate after ovariectomy. Journal of Reproduction cmdFertility, 68,113-117. Adams, N.R. (1990). Permanent infertility in ewes exposed to plant estrogens. Australian Veterinary... 

Lundh, T. (1990a). Conjugation of the plant estrogens formononetin and daidzein and their metabolite equol by gastrointestinal epithehiun from cattle and sheep. Journal of Agricultural and Food Chemistry, 38, 912-916. 

Lundh, T. (1990b). Uptake, metabohsm and biological effects of plant estrogens in sheep and cattle. Report no. 195. Sveriges lantbruksuniversitet, Institutionen for Husdjurens Utfodring och Yard,... 

Lundh, T.J., Pettersson, H.I. Martinsson, K.A. (1990). Comparative levels of free and conjugated plant estrogens in blood plasma of sheep and cattle fed estrogenic silage. Journal of Agricultural and Food Chemistry, 38,1530-1534. 

Nilsson, A. (1961). On the in vitro metabolism of the plant estrogen biochanin A in rumen fluid. 

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