Natural Product Research最新文献

Zanthoxylum armatum, a versatile plant known for its extensive pharmacological and phytochemical properties, has been traditionally utilised in various cultures for medicinal purposes. It is a widely recognised medicinal plant of the Rutaceae family, indigenous to Korea, China, Japan, and Pakistan, and thrives particularly in subtropical and temperate regions globally. Various parts of the plant hold medicinal significance: the seeds serve as a spice, condiment, and tonic; the wood finds application in dental care, crafting walking sticks, and timber; the fruit is utilised for oil extraction, water purification, and as an odontalgic, stomachic, and stimulant; the bark is valued as a tonic; while branches and thorns are utilised for their stimulant, stomachic, and odontalgic properties. The plant contains various bioactive compounds, including lignans, alkaloids, sterols, coumarins, phenolics, terpenoids, flavonoids, benzenoids, glycosides, alkenic acids, amino acids, fatty acids, armamide, L-sesamin, L-asarin, L-planinin, limonene, methyl cinnamate, linalool, linayl acetate, geraniol methyl cinnamate, citral, linalool and sabines. This review aims to comprehensively cover the pharmacological and phytochemical properties of Z. armatum, serving as a foundation for future research and potential applications.

Twelve flavonoids (1-12) including a new flavonol glycoside, hibiscetin 3-O-glucopyranoside-8-O-glucuronopyranoside, ten known galloylglucoses (13-22) and three known phenolic acids (23-25) were isolated from the aerial parts of Rhodiola rosea growing in Japan. Their chemical structures were elucidated by UV-vis spectra, LC-MS, HR-MS, acid hydrolysis, NMR, and/or HPLC, and TLC comparisons with authentic samples. Antioxidant activity of major 14 compounds was measured by H-ORAC method, and two flavonols, herbacetin 3-O-glucoside-8-O-glucuronide, and gossypetin 3-O-glucuronide-8-O-glucoside, showed the strongest activity. Moreover, chemical adaptation to severe alpine environment of R. rosea was discussed.

The study investigates the antibacterial potential of hydroalcoholic extracts from Rosmarinus officinalis and Zataria multiflora, combined with ciprofloxacin, against methicillin-resistant Staphylococcus aureus (MRSA). Initial screening showed promising results, leading to further exploration of the synergistic effect of the extracts and ciprofloxacin. The combination of the two extracts had an additive effect, while the combination of each extract with ciprofloxacin resulted in partial synergism. The most significant synergistic effect was observed against MRSA 9, with a 3200-fold reduction in the MIC value of ciprofloxacin. The similar inhibitory concentration of the extracts for all MRSA strains suggests these non-antibiotic agents have a broad spectrum of activity against MRSA. This offers a promising avenue for developing new therapeutic approaches to tackle drug-resistant bacterial infections. The results highlight the potential of combining R. officinalis and Z. multiflora extracts with ciprofloxacin to enhance antibacterial efficacy against MRSA strains.

Vorinostat elicitation of the deep-sea fungus Talaromyces sp. HDN17-428 resulted in the isolation of one new compound, talaroenamine L (1) with unusual leptosphaeronyl moiety and three known compounds (2-4). Structures of 1-4 were confirmed by extensive NMR, HRESIMS and OR calculations. Antimicrobial activities of all compounds were tested in which compounds 1-4 showed substantial antifungal activities with MIC values ranged from 3.1 to 12.5 μM.

Gandhamardan has a rich heritage of floristic diversity with undocumented medicinal plants, called Anukta Dravya having immense pharmacological values. Among them, Pittosporum napaulense (DC.) Rehder & E. H. Wilson is an important medicinal plant with widespread pharmacological importance. The antioxidant potential, antibacterial and antibiofilm activities of P. napaulense (DC.) were evaluated. The ethanolic extract showed the highest share of phenolic and flavonoid contents responsible for DPPH and ABTS radical scavenging activity with an IC50 of 5.58 and 5.28 µg/ml, respectively. In addition, the extracts also showed antibacterial and antibiofilm properties against multidrug-resistant bacterial strains, Staphylococcus aureus and Shigella sp. The biological activities of P. napaulense (DC.) bark could be attributed to the presence of phytoconstituents such as Malabaricone C, Borapetoside B, Kanzonol R. as evident from UPLC-Q-TOF-MS analysis. Based on the bioactivities; this plant could be explored for the development of potential therapeutic drug candidates against severe bacterial diseases.

Natural extract plays a crucial role in our lives, major compound in the n-hexane (AR-H) and the ethyl acetate (AR-E) Aristolochia olivieri extracts was n-hexadecanoic acid, and of the methanol extract (AR-M) was pentacosane. The AR-M extract had a strong ability to induce mRNA expression of an inflammatory cytokine, IL-6, as an M1-like macrophage subset compared to the negative control (DMSO-treated cells). In contrast, AR-E treatment showed strong anti-inflammatory activity against macrophages. The AR-H extract had a moderate inflammatory effect against macrophages. The IC50 results of the anticancer assays ranged from 58.29 to 451.03 μg/mL for the three extracts. The anticancer action of the AR-E extract against U-87MG cells was higher (58.29 μg/mL) than that of AR-H and AR-M (156.38 and 196.14 μg/mL, respectively). The greater cytotoxicity effect observed with the AR-E extract against U-87MG can be linked to its high content of hexadecanoic acid (32.49%) and linolenic acid (12.90%).

A natural deep eutectic solvent-based ultrasound-assisted simultaneous extraction (NADES-UAE) of camptothecin (CPT) and 10-hydroxycamptothecin (10-HCPT) was established. The 1.31 mg of CPT and 1.66 mg of 10-HCPT were obtained from each gram of the fruit powder of Camptotheca acuminata under the optimum conditions with a water content of 20%, a liquid-solid ratio of 12 mL/g and an ultrasound time of 20 min. The recovery efficiencies of CPT and 10-HCPT after AB-8 resin enrichment were 70.5% and 74.8%, respectively. The stronger interaction between NADES3 which was screened from 12 kinds of NADES and target components compared with methanol or water was demonstrated using molecular dynamics simulation. Moreover, the recovered NADES3 could be reused at least 4 times. The present research provided an efficient, environment-friendly, and sustainable method for extracting and recovering CPT and 10-HCPT from the fruits of C. acuminata.