Alima Abilkassymova

Atraphaxis pyrifolia, a native medicinal plant of Central Asia, has a long history of traditional medicinal use; however, scientific research on its phytochemical and biological properties remains scarce. This paper aims to elucidate its chemical profile and assess its pharmacological potential through a comprehensive investigation of the phytochemical composition of stems and leaves using Liquid Chromatography-Mass Spectrometry (LC-MS), in conjunction with the assessment of its antioxidant (DPPH and ABTS) and cytotoxicity test on Artemia salina. Predominantly, glycosylated flavonoids were detected in stems and leaves extracts, notably including 8-Acetoxy-3′,4′,5,5′-tetrahydroxy-7-methoxy-3-α-L-rhamno-pyranosyloxyflavone, pyrifolin, and dehydroxypyrifolin. While the latter compound is exclusive to A. pyrifolia, the former compounds serve as shared chemical markers with other Atraphaxis species. The methanolic extracts of A. pyrifolia leaves exhibited significant antioxidant capacity without toxicity against Artemia salina. This study contributes to current research through providing valuable insights into the chemical diversity and potential medicinal properties of this plant species.

Atraphaxis pyrifolia is a native species of Central Asia, known for curing several disorders. The species has little knowledges about its chemical composition and any information about its morphological characteristics despite its importance in traditional Asian medicine. This is one of the first approaches to the phytochemical and morphological characterization of this species. Micro-morphology was performed on the stem, and leaf parts of this plant to profile the morpho-anatomical characters using brightfield, fluorescence, polarized and scanning electron microscopy. Leaves were extracted with hexane and methanol. The hexane extract was analyzed using GC-MS analysis revealing the major presence of γ-sitosterol and nonacosane. The methanolic extract was submitted to Vacuum Liquid Chromatography and Sephadex LH-20. HPTLC, HR-ESI-MS and NMR techniques were used to identify the main compounds. Four glycosylated flavonoids were isolated: 8-O-acetyl-7-O-methyl-3-O-α-l-rhamnopyranosylgossypetin (Compound 1), and 7-O-methyl-3-O-α-l-rhamnopyranosylgossypetin (Compound 3), and two other compounds reported for the first time in the literature (Compounds 2 and 4). The findings presented herein furnish pertinent information essential for the identification and authentication of this medicinal plant. Such insights are invaluable for facilitating robust quality control measures and serve as a foundational framework for subsequent endeavours in metabolic, pharmacological, and taxonomical analyses.