Herbal Arctostaphylos uva-ursi and antiinflammatory activities

Arctostaphylos uva-ursi is one of the species of Bearberry, in the genus Arctostaphylos, belonging to the family Ericaceae, native to the northern North America, Asia and Europe. The herb has been used in traditional medicine as diuretic agent and to treat urinary problems, including bladder infections, kidney infection, kidney stone, pelvic pain, etc.
Inflammation is a condition of Immune system self-protection to remove harmful stimuli, including damaged cells, irritants, pathogens... from our body.

The Ingredients It contains arbutin, ursolic acid, tannic acid, gallic acid, some essential oil and resin, hydroquinones tannins,  phenolic glycosides and flavonoids.

The benefits
Water extract (UW-ext) collected from the the leaf of Arctostaphylos uva-ursi (L.) Spreng (Bearberry leaf), is found to exhibit its anti-inflammatory effects in ear swelling by picryl chloride-induced contact dermatitis (PC-CD) and carrageenin-induced paw edema. arbutin isolated from the leaves of Arctostaphylos uva-ursi (L.) Spreng., when combined with and indomethacin on Type IV allergic reaction-induced immuno-inflammation, carrageenin-induced edema and adjuvant-induced arthritis, found to be effective as arbutin may increase the inhibitory action of indomethacin on PC-CD, SRBC-DTH, carrageenin-induced edema and adjuvant-induced arthritis, but further investigations are required to understand the mechanism involved. Other study also indicated that 50% methanolic extract (U-ext), containing arbutin, possesses a therapeutic effect against immuno-inflammation induced by  by picryl chloride (PC-CD) and also increases the inhibitory effect of prednisolone.

The Side effect
1. Overdoses may cause gastrointestinal discomfort, including cause nausea, vomiting, etc. and fever, chills, severe back pain, ringing in the ears, etc.
2. The herb may interact with other medicine, including diuretic
3. Do not use the herb in new born, children or if you are pregnant or breast feeding without approval from the related field specialist.
4. Etc.


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References
(1) [Pharmacological studies on leaf of Arctostaphylos uva-ursi (L.) Spreng. V. Effect of water extract from Arctostaphylos uva-ursi (L.) Spreng. (bearberry leaf) on the antiallergic and antiinflammatory activities of dexamethasone ointment].[Article in Japanese] by Matsuda H, Nakamura S, Tanaka T, Kubo M.(PubMed)
(2) [Pharmacological studies on leaf of Arctostaphylos uva-ursi (L.) Spreng. III. Combined effect of arbutin and indomethacin on immuno-inflammation].[Article in Japanese] by Matsuda H, Tanaka T, Kubo M.(PubMed)
(3) [Pharmacological studies on leaf of Arctostaphylos uva-ursi (L.) Spreng. I. Combined effect of 50% methanolic extract from Arctostaphylos uva-ursi (L.) Spreng. (bearberry leaf) and prednisolone on immuno-inflammation].[Article in Japanese] by Kubo M, Ito M, Nakata H, Matsuda H.(PubMed)