Quantitative analysis of tiliroside and other flavonoid glycosides in Hippophae salicifolia D. Don leaves by HPLC-PDA

A new HPLC-PDA method was developed and validated for simultaneous determination of five phenolic compounds (trans-and cis- isomers of tiliroside, quercetin-3-O-β-D-glucoside, ellagic acid, kaempferol-3-O-β-D-glucoside and isorhamnetin-3-O-glucoside) in the leaves of Hippophae salicifolia D. Don. Of the five compounds, three (tiliroside, quercetin-3-O-β-D-glucoside and ellagic acid) were isolated and characterised by spectroscopy techniques. The developed HPLC method provided a selective, sensitive and rapid analysis with good linearity (r2> 0.999), accuracy and precision. Also, the leaves of H. salicifolia were extracted by three different extraction techniques viz. reflux, microwave and ultrasound. Methanolic extracts prepared by reflux method showed the highest content of all the five compounds.

Hippophae salicifolia D. Don, a Fascinating Medicinal Plant: An Update on its Traditional Medicinal Uses, Ethnopharmacology and Phytochemistr

Abstract:

Hippophae salicifolia, belonging to family Elaegnaceae, is a thorny shrub, and shows actinorhizal habit. The species prefers a habitat of temperate regions in Europe and Asia. In India, it is distributed in the Himalayan region of Uttarakhand, Himachal Pradesh, Jammu and Kashmir, and the North-Eastern parts. The oil, fruits, leaves, and bark of Hippophae species have a pronounced use in ethnomedicines, nutritional food, cosmetics, nitrogen-fixing in soil, water conservation and as fuel source. The aim of this review is to provide updated, comprehensive, and classified information on the traditional uses, phytochemistry, pharmacological and toxicological research carried out on H. salicifolia. This will help researchers to explore its therapeutic potential and examine future research possibilities. The chemical composition of this shrub comprises minerals, vitamins, flavonoids, flavonoid glycosides, polyunsaturated fatty acids, sugars, carotenoids, and nucleobases. Pharmacological studies demonstrated that the extracts prepared from leaves, barks, and berries along with fixed oil of this species are useful as anti-oxidant, anti-inflammatory, anti-cancer, anti-diabetic, anti-depressant, anti-microbial, adaptogenic, and wound healing. The results of toxicity study of H. salicifolia extracts did not show any significant acute toxicity in experimental animals. Abundance of phenolic compounds, minerals, and fatty acids within the different parts of this plant prompted researchers to isolate and characterize the phytoconstituents which are responsible for its therapeutic uses.

Origanum vulgare L.: In vitro Assessment of Cytotoxicity, Molecular Docking Studies, Antioxidant and Anti-inflammatory Activity in LPS Stimulated RAW 264.7 Cells

BACKGROUND

Inflammation involves a dynamic network that is highly regulated by signals that initiate the inflammation process as well as signals that downregulate it. However, an imbalance between the two leads to tissue damage. Throughout the world, inflammatory disease becomes common in the aging society. The drugs which are used clinically have serious side effects. Natural products or compounds derived from natural products show diversity in structure and play an important role in drug discovery and development.

OBJECTIVE

Oreganum Vulgare is used in traditional medicine for various ailments including respiratory and rheumatic disorders, severe cold, suppression of tumors. The current study aims to evaluate the anti-inflammatory potential by evaluating various in vitro parameters.

METHODS

Inflammation-induced in macrophages via LPS is the most accepted model for evaluating the antiinflammatory activity of various plant extracts and lead compounds.

RESULTS

The extracts (OVEE, OVEAF) as well as the isolated compound(OVRA)of Oreganum Vulgare inhibit the pro-inflammatory cytokines (IL-6 and TNF-α) and NO without affecting cell viability.

CONCLUSION

Our study established that the leaf extracts of Oreganum vulgare L. exhibit anti-inflammatory activity and thus confirm its importance in traditional medicine.