a. Inflammatory effects
Catechins might be useful therapeutically as an anti-inflammatory modulator of dental pulpal inflammation(203), through up-regulated expressions of IL-8 in fighting against infection or PGE(2) in response to infection or inflammation(202).
b. Antiviral activities
(-)-epigallocatechin (EGC) and green tea extract (GTE) inhibited the cytopathic effect of coxsackie B3 virus, but did not inhibit the cytopathic effects of HSV-1, HSV-2, influenza A or influenza B viruses(203(204).
c. Antioxidants
Polyphenolic components extracted from green tea leaves, exhibit antioxidative effects against free radical initiated and peroxidation of human low density lipoprotein(205)(206).
2.
Catechin is phytochemical of Flavan-3-ols, in the group of Flavonoids (polyphenols), found abundantly in white tea, green tea, black tea, grapes, wine, apple juice, cocoa, lentils, etc.
a. Body-weight regulation
Green tea-caffeine showed to exert its hypolipidemic and antiobesogenic effects through
regulate peroxisome proliferator-activated receptors (PPARs) in the effect on lipid metabolism and obesity(207). The Ewha Womans University study also support the above result in weight reduction but through genes expression(208)
. It mixture improves weight maintenance, through thermogenesis, fat oxidation, and sparing fat free mass(209).
b. Antioxidant activity(210)(211)
Polyphenolic compounds (included catechins) in the berries of edible honeysuckle, including proanthocyanidins, catechins
, exhibit the beneficial anti-adherence and chemo-protective activities in against a number of chronic conditions, e.g., cancer, diabetes mellitus, tumour growth or cardiovascular and neurodegenerative diseases, according to the study by Constantine the Philosopher University in Nitra(212).
c. Anti-inflammatory effect
Polymeric tannins and monomeric flavonoids, such as catechin and epicatechin found in green tea showed to exhibit anti inflammatory effects(213) through interfere with immunobiochemical pathways that are highly relevant for immunosurveillance and competing virus infections(213)
.
3. Theaflavin is phytochemicals of Flavan-3-ols, in the group of Flavonoids (polyphenols) found abundantly in black tea.
a. Antioxidant capacities
Theaflavin-3′-gallate (TF(2)B), a derivative of theaflavin exhibits positive antioxidant capacities on singlet oxygen(214), hydrogen peroxide(215), hydroxyl radical(216), and the hydroxyl radical induced DNA damage in vitro(214).
b. Antimicrobial activities
Plant polyphenols, including Theaflavins have exhibited anti microbial activity against several food-borne pathogenic bacteria(217) and growed in Mueller-Hinton medium(218).In the evaluation of the antimicrobial activities of seven green tea catechins and four black tea theaflavins, including (-)-gallocatechin-3-gallate, (-)-epigallocatechin-3-gallate, (-)-catechin-3-gallate, (-)-epicatechin-3-gallate, theaflavin-3, 3′-digallate, theaflavin-3′-gallate, and theaflavin-3-gallate exhibit antimicrobial activities, better than medicinal antibiotics, such as tetracycline or vancomycin, at comparable concentrations(218).
c. Anti inflammation
The major polyphenolic compounds in black tea leaves are theaflavins
strongly inhibited TPA-induced edema of mouse ears, through its anti inflammatory activity(219).
4. Myricetin is a flavonol, belong to the flavonoid in Flavonoids (polyphenols), found in many grapes, berries, fruits, vegetables, herbs, as well as other plants. It has been used as antioxidant to lower cholesterol, treat certain types of cancer, etc.
a. Antioxidant and cytotoxic activity
Extracted from plants containing phenolic compound, including flavonoid-galloyl glycoside [myricetin 3-O-(2',3'4'-tri-O-galloyl)-α-l-rhamnopyranoside] exhibited high antioxidant activity(220)(221) and cytotoxic activity(222) against Hep G2 and hepatocellular carcinoma(220).
b. Antitumour and anti-inflammatory activities
On mammary tumour cells LM2, myricetin may be a promising agent in the treatment of murine breast cancer by immunomodulatory and antiproliferative activities due to its inhibitory activity to the release of NO(223). According to the study by East China Normal University, the phytochemical Myricetin also consist anti obesity and anti anti inflammatory activity(224)
5. Cyanidin is an anthocyanins (flavonals), in the group of Flavonoids (polyphenols), found abundantly in red apple and pear, bilberry, blackberry, blueberry, cherry, cranberry, peach, plum, hawthorn, etc.
a. Antioxidants
In menopausal women, intake antioxidants has shown to reduce the level of OS. Blackberries (BBs) containing mainly cyanidin 3-O-β-d-glucoside (C3G) exhibit its antioxidant effect in preventing bone loss in rat model(225). According to the joint study by Wonkwang University, Cyanidin-3-glucoside (C3G) is one of the major components of anthocyanin, a water-soluble phytochemical, may be a potential antioxidant for prevention of bone-related diseases, such as osteoporosis, rheumatoid arthritis, and periodontitis(226)
b. Anti-inflammatory Effects
According to Kyung Hee University, cyanidin-3-O-beta-D-glycoside express potent anti-inflammatory effects by regulating NF-kappaB pathway(228). Its polyphenolic-enriched red raspberry extract, containing Cyanidin-3-glucoside (C3G) one of the major component of anthocyanin decreases in the rate of degradation of both proteoglycan and type II collagen as well as inhibition of
inflammation, pannus formation, cartilage damage, and bone resorption(227).
c. Obesity
Cyanidin-3-O-β-glucoside (Cy-3-g)-rich foods inhibited the onset of obesity, partly related to the activation of skeletal muscle lipoprotein lipase(LPL), and inhibition of LPL in adipose tissue(229)(230).
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References
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