WANG Yue,LIU Xiao-qian,LIANG Yao-hua,et al.Anti-acetylcholinesterase Active Ingredients from Aconitum tanguticum by UPLC-Q-TOF-MS/MS[J].Chinese Journal of Experimental Traditional Medical Formulae,2021,27(20):130-137.
WANG Yue,LIU Xiao-qian,LIANG Yao-hua,et al.Anti-acetylcholinesterase Active Ingredients from Aconitum tanguticum by UPLC-Q-TOF-MS/MS[J].Chinese Journal of Experimental Traditional Medical Formulae,2021,27(20):130-137. DOI: 10.13422/j.cnki.syfjx.20211446.
Anti-acetylcholinesterase Active Ingredients from Aconitum tanguticum by UPLC-Q-TOF-MS/MS
To identify the anti-acetylcholinesterase active ingredients in
Aconitum tanguticum
, so as to lay the foundation for finding new anti-Alzheimer's disease (AD) drugs.
Method
2
The anti-acetylcholinesterase active fractions of
A. tanguticum
were screened by the modified Ellman's method, and the chemical composition of the active fraction was analyzed by ultra-performance liquid chromatography-quadrupole time-of-flight mass spectrometry (UPLC-Q-TOF-MS/MS). The chromatographic separation was performed on an ACQUITY UPLC BEH C
18
column (2.1 mm×50 mm, 1.7 μm) with acetonitrile (A)-0.4% ammonia aqueous solution (B) as mobile phase for gradient elution, and the column temperature was set at 30 ℃ with the flow rate of 0.4 mL·min
-1
. Phase A of the dichloromethane fraction changed with time as follows:0-3 min, 5%A; 3-7 min, 5%-20%A; 7-11.5 min, 20%-33%A; 11.5-15.5 min, 33%-50%A; 15.5-20.5 min, 50%-80%A; 20.5-23 min, 80%-85%A; 23-25 min, 85%-95%A. Phase A of the
n
-butanol fraction changed with time as follows:0-2 min, 5%A; 2-8 min, 5%-20%A; 8-11 min, 20%-33%A; 11-15 min, 33%-95%A. Mass spectrometry was performed on electrospray ionization, data were collected in positive ion mode, and the detection range was
m
/
z
100-1 500.
Result
2
Both the dichloromethane and
n
-butanol fractions had a certain inhibitory effect on acetylcholinesterase, their half inhibitory concentration (IC
50
) values were (64±4.4) mg·L
-1
and (85.7±3.8) mg·L
-1
, respectively. By UPLC-Q-TOF-MS/MS analysis, a total of 21 alkaloids were identified from the dichloromethane fraction, and 11 alkaloids were identified from
n
-butanol fraction. Guan-fu base Ⅰ, found in both fractions, was first discovered in
A. tanguticum
.
Conclusion
2
Diterpene alkaloids are the main anti-acetylcholinesterase substances of
A. tanguticum
, which is worth further exploration.
关键词
Keywords
references
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