Share:

Genistein

5,7-Dihydroxy-3-(4-hydroxyphenyl)-4H-1-benzopyran-4-one; Baichanin A; Bonistein; 4’,5,7-Trihydroxyisoflavone; GeniVida; Genisteol; NSC 36586; Prunetol; Sophoricol;

Genistein , an isoflavone found in many Fabaceae plants and important non-nutritional constituent of soybeans (Glycine max Merill), is a well-known plant metabolite from phenylpropanoid pathway, chiefly because of its presence in numerous phytoestrogenic dietary supplements. In fact, the compound also strives for higher medicinal status, undergoing dozens of clinical trials for various ailments, from osteoporosis to cancer

 

NMR

Genistein; CAS: 446-72-0

REF http://www.wangfei.ac.cn/nmrspectra/7/1/30

SEE https://www.google.com/patents/EP2373326A1?cl=en

Genistein is an angiogenesis inhibitor and a phytoestrogen and belongs to the category of isoflavones. Genistein was first isolated in 1899 from the dyer’s broom, Genista tinctoria; hence, the chemical name. The compound structure was established in 1926, when it was found to be identical with prunetol. It was chemically synthesized in 1928.^[1]

Natural occurrences

Isoflavones such as genistein and daidzein are found in a number of plants including lupin, fava beans, soybeans, kudzu, andpsoralea being the primary food source,^[2][3] also in the medicinal plants, Flemingia vestita^[4] and F. macrophylla,^[5][6] and coffee.^[7] It can also be found in Maackia amurensis cell cultures.^[8]

Extraction and purification

Most of the isoflavones in plants are present in a glycosylated form. The unglycosylated aglycones can be obtained through various means such as treatment with the enzyme β-glucosidase, acid treatment of soybeans followed by solvent extraction, or by chemical synthesis.^[9] Acid treatment is a harsh method as concentrated inorganic acids are used. Both enzyme treatment and chemical synthesis are costly. A more economical process consisting of fermentation for in situ production of β-glucosidase to isolate genistein has been recently investigated.^[10]

Biological effects

Besides functioning as antioxidant and anthelmintic, many isoflavones have been shown to interact with animal and human estrogen receptors, causing effects in the body similar to those caused by the hormone estrogen. Isoflavones also produce non-hormonal effects.

Molecular function

Genistein influences multiple biochemical functions in living cells:

• full agonist of ERβ (EC₅₀ = 7.62 nM) and, to a much lesser extent (~20-fold), full agonist^[11] or partial agonist of ERα^[12]
• agonist of GPER (GPR30)^[13]
• activation of peroxisome proliferator-activated receptors (PPARs)
• inhibition of several tyrosine kinases
• inhibition of topoisomerase
• inhibition of AAAD
• direct antioxidation with some proxidative features
• activation of Nrf2 antioxidative response
• stimulation of autophagy^[14][15][16]
• inhibition of the mammalian hexose transporter GLUT1
• contraction of several types of smooth muscles
• modulation of CFTR channel, potentiating its opening at low concentration and inhibiting it a higher doses.
• inhibition of cytosine methylation
• inhibition of DNA methyltransferase^[17]
• inhibition of the glycine receptor

Activation of PPARs

Isoflavones genistein and daidzein bind to and transactivate all three PPAR isoforms, α, δ, and γ.^[18] For example, membrane-bound PPARγ-binding assay showed that genistein can directly interact with the PPARγ ligand binding domain and has a measurable Ki of 5.7 mM.^[19] Gene reporter assays showed that genistein at concentrations between 1 and 100 uM activated PPARs in a dose dependent way in KS483 mesenchymal progenitor cells, breast cancer MCF-7 cells, T47D cells and MDA-MD-231 cells, murine macrophage-like RAW 264.7 cells, endothelial cells and in Hela cells. Several studies have shown that both ERs and PPARs influenced each other and therefore induce differential effects in a dose-dependent way. The final biological effects of genistein are determined by the balance among these pleiotrophic actions.^[18][20][21]

Tyrosine kinase inhibitor

The main known activity of genistein is tyrosine kinase inhibitor, mostly of epidermal growth factor receptor (EGFR). Tyrosine kinases are less widespread than their ser/thr counterparts but implicated in almost all cell growth and proliferation signal cascades.

Redox-active — not only antioxidant

Genistein may act as direct antioxidant, similar to many other isoflavones, and thus may alleviate damaging effects of free radicals in tissues.^[22][23]

The same molecule of genistein, similar to many other isoflavones, by generation of free radicals poison topoisomerase II, an enzyme important for maintaining DNA stability.^[24][25][26]

Human cells turn on beneficial, detoxyfying Nrf2 factor in response to genistein insult. This pathway may be responsible for observed health maintaining properities of small doses of genistein.^[27]

Anthelmintic

The root-tuber peel extract of the leguminous plant Felmingia vestita is the traditional anthelmitic of the Khasi tribes of India. While investigating its anthelmintic activity, genistein was found to be the major isoflavone responsible for the deworming property.^[4][28] Genistein was subsequently demonstrated to be highly effective against intestinal parasitessuch as the poultry cestode Raillietina echinobothrida,^[28] the pork trematode Fasciolopsis buski,^[29] and the sheep liver fluke Fasciola hepatica.^[30] It exerts its anthelmintic activity by inhibiting the enzymes of glycolysis and glycogenolysis,^[31][32] and disturbing the Ca2+ homeostasis and NO activity in the parasites.^[33][34] It has also been investigated inhuman tapeworms such as Echinococcus multilocularis and E. granulosus metacestodes that genistein and its derivatives, Rm6423 and Rm6426, are potent cestocides.^[35]

Atherosclerosis

Genistein protects against pro-inflammatory factor-induced vascular endothelial barrier dysfunction and inhibits leukocyte–endothelium interaction, thereby modulating vascular inflammation, a major event in the pathogenesis of atherosclerosis.^[36]

Cancer links

Genistein and other isoflavones have been identified as angiogenesis inhibitors, and found to inhibit the uncontrolled cell growth of cancer, most likely by inhibiting the activity of substances in the body that regulate cell division and cell survival (growth factors). Various studies have found that moderate doses of genistein have inhibitory effects on cancersof the prostate,^[37][38] cervix,^[39] brain,^[40] breast^[37][41][42] and colon.^[16] It has also been shown that genistein makes some cells more sensitive to radio-therapy.;^[43] although, timing of phytoestrogen use is also important. ^[43]

Genistein’s chief method of activity is as a tyrosine kinase inhibitor. Tyrosine kinases are less widespread than their ser/thr counterparts but implicated in almost all cell growth and proliferation signal cascades. Inhibition of DNA topoisomerase II also plays an important role in the cytotoxic activity of genistein.^[25][44] Genistein has been used to selectively target pre B-cells via conjugation with an anti-CD19 antibody.^[45]

Studies on rodents have found genistein to be useful in the treatment of leukemia, and that it can be used in combination with certain other antileukemic drugs to improve their efficacy.^[46]

Estrogen receptor — more cancer links

Due to its structure similarity to 17β-estradiol (estrogen), genistein can compete with it and bind to estrogen receptors. However, genistein shows much higher affinity towardestrogen receptor β than toward estrogen receptor α.^[47]

Data from in vitro and in vivo research confirms that genistein can increase rate of growth of some ER expressing breast cancers. Genistein was found to increase the rate of proliferation of estrogen-dependent breast cancer when not cotreated with an estrogen antagonist.^[48][49][50] It was also found to decrease efficiency of tamoxifen and letrozole – drugs commonly used in breast cancer therapy.^[51][52] Genistein was found to inhibit immune response towards cancer cells allowing their survival.^[53]

Effects in males

Isoflavones can act like estrogen, stimulating development and maintenance of female characteristics, or they can block cells from using cousins of estrogen. In vitro studies have shown genistein to induce apoptosis of testicular cells at certain levels, thus raising concerns about effects it could have on male fertility;^[54] however, a recent study found that isoflavones had “no observable effect on endocrine measurements, testicular volume or semen parameters over the study period.” in healthy males given isoflavone supplements daily over a 2-month period.^[55]

Carcinogenic and toxic potential

Genistein was, among other flavonoids, found to be a strong topoisomerase inhibitor, similarly to some chemotherapeutic anticancer drugs ex. etoposide and doxorubicin.^[24][56]In high doses it was found to be strongly toxic to normal cells.^[57] This effect may be responsible for both anticarcinogenic and carcinogenic potential of the substance.^[26][58] It was found to deteriorate DNA of cultured blood stem cells, what may lead to leukemia.^[59] Genistein among other flavonoids is suspected to increase risk of infant leukemia when consumed during pregnancy.^[60][61]

Sanfilippo syndrome treatment

Genistein decreases pathological accumulation of glycosaminoglycans in Sanfilippo syndrome. In vitro animal studies and clinical experiments suggest that the symptoms of the disease may be alleviated by adequate dose of genistein.^[62] Genistein was found to also possess toxic properties toward brain cells.^[57] Among many pathways stimulated by genistein, autophagy may explain the observed efficiency of the substance as autophagy is significantly impaired in the disease.^[63][64]

Related compounds

Glycosides

Genistin is the 7-O-beta-D-glucoside of genistein.

Acetylated compounds

Wighteone is the 6-isopentenyl genistein (6-prenyl-5,7,4′-trihydroxyisoflavone)^{[citation needed]}

Pharmaceutical derivatives

• KBU2046 under investigation for prostate cancer.^[65][66]
• B43-genistein, an anti-CD19 antibody linked to genistein e.g. for leukemia.^[67]
• Genistein has two known synthesis routes: deoxybenzoin route and chalcone route. Deoxybenzoin route uses friedel-craft reaction, and chalcone route uses aldol condensation as shown in figure 2. Developing synthesis of genistein allows the access to the affordable therapy as well as mass production of commercial genistein supplements. However, it would be recommended to consult with the health care provider and discuss the pros and cons before the use since the effects of genistein on human body are not fully understood yet as discussed above.

Figure 2. Synthesis of genistein via deoxybenzoin route or chalcone route. 10

https://chemprojects263sp11.wikispaces.com/genistein

Paper

Identification of Benzopyran-4-one Derivatives (Isoflavones) as Positive Modulators of GABAA Receptors
ChemMedChem (2011), 6, (8), 1340-1346

http://onlinelibrary.wiley.com/doi/10.1002/cmdc.201100120/abstract

PATENT

By Achmatowicz, Osman et al

From Pol., 204473

References

External links

• Compound Summary at NCBI PubChem
• Fact Sheet at Zerobreastcancer
• Information at Phytochemicals
• Chemical Compound Review at Wikigenes
• Information at Chemicalbook
• Description at SpringerReference
• Description at NCI Drug Dictionary

Development and scale-up of the synthetic process for genistein preparation are described. The process was designed with consideration for environmental and economical aspects and optimized in a laboratory scale. In a scale up, on every step quantity of the environmentally unfriendly substrates or solvents was reduced without compromising the quality of the final product, and the waste load was significantly diminished. The optimal duration times of the individual stages were determined, and the number of operations was reduced, leading to lowering of energy consumption. Elaborated process secures good yield and quality expected for pharmaceutical substances.

Technical Process for Preparation of Genistein

Genistein

Names
IUPAC name 5,7-Dihydroxy-3-(4-hydroxyphenyl)chromen-4-one
Other names 4′,5,7-Trihydroxyisoflavone
Identifiers
CAS Number	446-72-0
ChEBI	CHEBI:28088
ChEMBL	ChEMBL44
ChemSpider	4444448
DrugBank	DB01645
IUPHAR/BPS	2826
Jmol 3D model	Interactive image
KEGG	C06563
PubChem	5280961
UNII	DH2M523P0H
InChI[show]
SMILES[show]
Properties
Chemical formula	C15H10O5
Molar mass	270.24 g·mol−1
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Akiyama, T., et al.: J. Biol. Chem., 262, 5592 (1987), O’Dell, T.J., et al.: Nature, 353, 588 (1991), Aharonovits, O., et al.: Biochim Biophys. Acta, 1112, 181 (1992), Platanias, L.C., et al.: J. Biol. Chem., 267, 24053 (1992), Yoshida, H., et al.: Biochim. Biophys. Acta, 1137, 321 (1992), Uckun, F.M., et al.: Science, 267, 886 (1995), Merck Index 12th ed. 4395, Huang, R.Q.; Fang, M.J.; Dillon, G.H., Mol. Brain Res. 67: 177-183 (1999)

//////BIO-300,  G-2535,  PTI-G-4660,  SIPI-9764-I,  PTIG-4660,  SIPI-9764I, Genistein, phase 2, national cancer institute

Oc1ccc(cc1)C\3=C\Oc2cc(O)cc(O)c2C/3=O

Supporting Info