Antimicrobial, DPPH scavenging and tyrosinase inhibitory activities of Thymus vulgaris, Helichrysum arenarium and Rosa damascena mill. ethanol extracts by using TLC bioautography and chemical screening methods

In vitro efficacy of Rosa damascena solid state fermentation liquid and water extract on skin care

BACKGROUND

As a medicinal and food homologous plant, Rosa damascena is not only highly ornamental, but also rich in a variety of active ingredients such as polyphenols and flavonoids. It is widely used in cosmetics, food and pharmaceutical industries.

OBJECTIVE

To study the in vitro efficacy of Rosa damascena solid state fermentation liquid (RDF) and water extract (RDE).

METHODS

Firstly, the effect of RDF and RDE on the proliferation rate of B16F10 cells was detected by CCK-8 method, and the melanin content was measured by sodium hydroxide lysis method to evaluate the whitening effect of them. Finally, the antioxidant, anti-wrinkling and soothing effects of RDF and RDE were evaluated by biochemical methods in vitro.

RESULTS

RDF and RDE within a certain concentration range (0.05%-0.5%) had no effect on the proliferation of B16F10 cells. Compared with Rosa damascena extract (RDE), RDF showed significant effects on bleaching, antioxidant, anti-wrinkling and soothing, among which 0.5% RDF showed the best effect.

CONCLUSION

Both RDF and RDE at a certain concentration have effect on skin care in vitro, but the effect of RDF is more significant than that of RDE.

Exploring of antioxidant and antibacterial properties of novel 1,3,4-thiadiazole derivatives: Facile synthesis, structural elucidation and DFT approach to antioxidant characteristics

In recent years, compounds containing thiophene and 1,3,4-thiadiazole skeletons have become important cyclic compounds, especially in medicinal chemistry. In this manner, we synthesized and isolated seven 1,3,4-thiadiazole derivatives with thiophene groups and fully characterized by elemental analysis and general spectroscopic methods such as ¹H NMR, ¹³C NMR, and FT-IR. Antibacterial activities of the title compounds were investigated by using TLC-Dot blot, macro dilution, well diffusion, and growth curve analysis methods. Compounds 1 and 6 showed inhibitory activities against all tested gram-negative and gram-positive bacteria. TLC-DPPH and DPPH assays, on the other hand, were performed to detect the antioxidant activities of the 1,3,4-thiadiazole derivatives and compound 1 exhibited the highest antioxidant activity at all tested concentrations. QTAIM and NCI calculations were performed as well as structural, electronic, and spectral analyzes using density functional theory (DFT). Calculations were carried out at the B3lyp/6-311 + +g(2d,2p) level of theory, and the data were used to examine the antioxidant activity of the compounds.

Mechanistic support of traditional Persian medicine for the treatment of acne vulgaris: A scoping review

BACKGROUND

Acne vulgaris is one of the most prevalent skin diseases, which also contributes to many psychological problems. Despite the recent progress in the treatment of acne vulgaris, the necessity for discovering more effective solutions has motivated many lines of research on natural and medicinal plants. The Traditional Persian Medicine (TPM) introduced some plants and remedies for acne treatment. Given the universal welcome for herbal medicine, this review was performed to formally assess the evidence for herbal medicines for acne vulgaris in TPM.

METHODS

The medicinal plants used in this study for treating acne vulgaris were selected based on common references to the plants in five famous textbooks of TPM from different time periods. Then, the anti-inflammatory and anti-microbial effects of these medicinal plants were investigated according to the recent literature available in five electronic databases including Scopus, Web of Sciences, PubMed, Google Scholar, and Science Direct.

RESULTS

Twenty-one herbs were commonly references in traditional TPM texts as helpful for topical treatment of acne vulgaris. The data collected from the electronic databases demonstrated most of these plants (eg, Astragalus sarcocolla, Ficus carica, and Hordeum vulgare) have both anti-inflammatory and anti-microbial mechanisms, which may assist to treat acne vulgaris.

CONCLUSION

This scoping review demonstrated many medicinal plants recommended by TPM books have therapeutic potential for acne vulgaris via multiple mechanisms.

The TLC-Bioautography as a Tool for Rapid Enzyme Inhibitors detection - A Review

Microorganisms and plants can be important sources of many compounds with potential pharmaceutical applications. Extraction of these matrices is one of the ways of identifying the presence of inhibitory active substances against enzymes whose high activity leads to serious human diseases including cancer, Parkinson's or Crohn's diseases. The isolation and purification of inhibitors are time-consuming and expensive steps in the analysis of the crude extract and therefore, it is necessary to find a fast, efficient, and inexpensive method for screening extracts of interest. TLC-Bioautography combines the separation of the extract on a thin layer with its subsequent biological analysis. TLC-Bioautography methods have been developed for several classes of enzymes including oxidoreductases, hydrolases and isomerases, and there is a potential for developing functional methods for other classes of enzymes. This review summarizes known TLC-Bioautography methods and their applications for determining the presence of enzyme inhibitors in extracts and compares the effectiveness of different methodological approaches. It also indicates the current state and perspective of the development of TLC-Bioautography and its possible future applications.