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Natural Product Research
Formerly Natural Product Letters
Volume 38, 2024 - Issue 10
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Research Articles

Alkaloids from the stems of Fissistigma maclurei Merr. inhibit the proliferation of synoviocytes

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Pages 1704-1710 | Received 23 Feb 2023, Accepted 20 May 2023, Published online: 31 May 2023
 

Abstract

Two new aporphine-derived alkaloids, aporaloids C and D (1 and 2), along with eight known biogenetically related alkaloids (310) were isolated from the stems of Fissistigma maclurei Merr. Their structures were elucidated by detailed analysis of NMR, HRESIMS, MS, IR, UV and Optical rotations data. Compounds 1 and 2 represent a rare example of N-methylol aporphine-derived alkaloids from natural sources. The inhibitory effect of all compounds on the proliferation of primary synovial cells was evaluated. Compound 3 showed potent inhibitory effect on the proliferation of synoviocytes with an IC50 value of 4.8 μM. Compounds 1, 2, 69 and 10 exhibited moderate inhibitory activity on synoviocytes, with IC50 values of 36.8, 37.1, 31.2 μM, 32.5, 36.3, 36.8 and 18.2 μM, respectively.

Graphical Abstract

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

This work was supported by the National Natural Science Foundation of China (82260831), the Hainan Province Natural Science Foundation (220QN252 and 2019RC174) and the Innovative Research Team Project of Ministry (IRT-16R19).

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