Cell extraction method coupled with LC-QTOF MS/MS analysis for predicting neuroprotective compounds from Polygonum...

Area of Science:

• Natural Product Chemistry
• Neuropharmacology
• Analytical Chemistry

Background:

• The neuroprotective potential of Polygonum tinctorium remains largely unexplored.
• The ethyl acetate (EtOAc) fraction of P. tinctorium has demonstrated significant neuroprotective effects against glutamate-induced cytotoxicity in HT22 cells.

Purpose of the Study:

• To identify specific neuroprotective compounds within the EtOAc fraction of P. tinctorium.
• To validate the efficacy of the cell extraction method coupled with LC-QTOF-MS/MS for natural product screening.

Main Methods:

• Utilized a cell extraction method combined with Liquid Chromatography-Quadrupole Time-of-Flight tandem Mass Spectrometry (LC-QTOF-MS/MS).
• Incubated HT22 cells with P. tinctorium extracts to identify selectively binding bioactive compounds.
• Isolated and characterized compounds using chromatographic and spectroscopic techniques.

Main Results:

• A novel flavonoid glycoside (1) and 14 known compounds (2-15) were isolated from the EtOAc fraction.
• Compounds 2, 3, 8, 13, and 15 were detected using the cell extraction method.
• Compounds 2, 8, 12, and 14 exhibited significant neuroprotective activities; compounds 2 and 14 were identified in P. tinctorium for the first time.

Conclusions:

• The cell extraction method coupled with LC-QTOF-MS/MS is an effective tool for screening and identifying neuroprotective compounds from natural sources.
• P. tinctorium contains promising compounds with potential therapeutic applications in neuroprotection.