Myricitrin - CAS 17912-87-7
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Not Intended for Therapeutic Use. For research use only.
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Myricitrin produces pronounced antinociception against chemical and mechanical models of pain in rodents via preventing the protein kinase C (PKC) alpha and PKC epsilon activation by phorbol myristate acetate (PMA).
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1.Safety assessment and single-dose toxicokinetics of the flavouring agent myricitrin in Sprague-Dawley rats.
Maronpot RR1, Koyanagi M2, Davis J3, Recio L3, Marbury D4, Boyle M3, Hayashi SM2. Food Addit Contam Part A Chem Anal Control Expo Risk Assess. 2015;32(11):1799-809. doi: 10.1080/19440049.2015.1084653. Epub 2015 Sep 23.
Myricitrin, a flavonol rhamnoside of myricetin extracted from the Chinese bayberry (Myrica rubra Siebold) plant, has been used in Japan since 1992 as a flavour modifier in snack foods, dairy products, and beverages. It is affirmed as generally recognised as safe (GRAS) by the US Flavour and Extract Manufacturer Association (FEMA) and is considered safe by the Joint FAO/WHO Expert Committee on Food Additives (JECFA) at current estimated dietary exposures. In anticipation of expanded marketing, 97% pure myricitrin was fed to male and female Sprague-Dawley rats at dietary concentrations of 0.5%, 1.5% and 5.0% in a 90-day toxicity study. There was increased food consumption and decreased body weight gain in males exposed to 5% myricitrin. Blood values were within laboratory reference ranges except for mean increases in basophils in low- and high-dose males and serum phosphorus in high-dose males. In the absence of abnormal clinical or histopathological changes, these changes are not considered adverse.
2.Myricitrin Ameliorates 6-Hydroxydopamine-Induced Dopaminergic Neuronal Loss in the Substantia Nigra of Mouse Brain.
Kim HD1,2, Jeong KH1, Jung UJ3, Kim SR1,2,4. J Med Food. 2016 Apr;19(4):374-82. doi: 10.1089/jmf.2015.3581. Epub 2016 Mar 18.
Parkinson's disease (PD) is a chronic and progressive movement disorder, resulting from the degeneration of the nigrostriatal dopaminergic (DA) pathway. The cause of DA neuronal loss in PD is still unclear; however, accumulating evidence suggests that treatment with certain flavonoids can induce neuroprotective properties, such as activation of mammalian target of rapamycin complex 1 (mTORC1) and anti-inflammatory activities in animal models of PD. The bioflavonoid myricitrin is well known for its anti-inflammatory and antioxidant properties. However, it is unclear whether systemic treatment with myricitrin can protect neurons against neurotoxin-induced DA degeneration in vivo via the preservation of tyrosine hydroxylase (TH) activity and the induction of mTORC1 activation. Our results found no significant neuroprotective effect of 30 mg/kg myricitrin on 6-hydroxydopamine (6-OHDA)-induced neurotoxicity in the substantia nigra (SN) of mice.
3.Myricitrin and bioactive extract of Albizia amara leaves: DNA protection and modulation of fertility and antioxidant-related genes expression.
Kassem ME1, Ibrahim LF1, Hussein SR1, El-Sharawy R1, El-Ansari MA1, Hassanane MM2, Booles HF2. Pharm Biol. 2016 Apr 6:1-6. [Epub ahead of print]
CONTEXT: Albizia species are reported to exhibit many biological activities including antiovulatory properties in female rats and antispermatogenic and antiandrogenic activities in male rats.
4.Environmental and Pharmacological Modulation of Amphetamine- Induced 50-kHz Ultrasonic Vocalizations in Rats.
Rippberger H, van Gaalen MM, Schwarting RK, Wohr M1. Curr Neuropharmacol. 2015;13(2):220-32.
Rats emit high-frequency 50-kHz ultrasonic vocalizations (USV) in appetitive situations like social interactions. Drugs of abuse are probably the most potent non-social elicitors of 50-kHz USV, possibly reflecting their euphorigenic properties. Psychostimulants induce the strongest elevation in 50-kHz USV emission, particularly amphetamine (AMPH), either when applied systemically or locally into the nucleus accumbens (Nacc). Emission of AMPH-induced 50-kHz USV depends on test context, such as the presence of conspecifics, and can be manipulated pharmacologically by targeting major neurotransmitter systems, including dopamine (DA), noradrenaline (NA), and serotonin (5-HT), but also protein kinase C (PKC) signaling. Several D1 and D2 receptor antagonists, as well as typical and atypical antipsychotics block the AMPH-induced elevation in 50-kHz USV. Inhibiting D1 and D2 receptors in the Nacc abolishes AMPH-induced 50-kHz USV, indicating a key role for this brain area.
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CAS 17912-87-7 Myricitrin

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