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Synthesis of novel andrographolide beckmann rearrangement derivatives and evaluation of their HK2-related anti-inflammatory activities.
- Source :
-
European Journal of Medicinal Chemistry . Jul2019, Vol. 173, p282-293. 12p. - Publication Year :
- 2019
-
Abstract
- Two series of andrographolide derivatives with introduction of amide moiety into ring A by Beckmann rearrangement were synthesized. In series 1, the ring A was converted to caprolactam, and an amide moiety was linked to C-19 of ring A in series 2. Among them, compound 8h exhibited obvious inhibition on HK2 enzyme activity (IC 50 = 9.36 ± 0.08 μM) and LPS-induced NO production in RAW264.7 cells (IC 50 = 22.38 ± 3.57 μM), and potent binding affinity with HK2 (Kd = 5.12 ± 0.82 μM). The preliminary structure-activity relationships (SARs) suggested that the formation of caprolactam of ring A and esterification of C-19-hydroxyl could improve the inhibitory effects on HK2 enzyme of andrographolide derivatives. Furthermore, compound 8h significantly reduced the levels of IL-1β and IL-6, down-regulated the expressions of iNOS and COX-2. Its anti-inflammatory effect was related to the inhibition of both NF-κB pathway and glycolysis enzyme HK2. Since HK2 could be a novel and effective target for anti-inflammation, compound 8h might be a new anti-inflammatory agent targeting at HK2, or serve as a lead compound to design and synthesize more HK2 inhibitors with better inflammatory effects. Image 1 • Two series of andrographolide derivatives with introduction of amide moiety into ring A were synthesized. • Compound 8h exhibited obvious inhibition of HK2 enzyme activity. • Compound 8h also could reduce LPS-induced NO, IL-1β and IL-6 production in RAW264.7 cells. • The anti-inflammatory action mechanism of 8h was related to the inhibition of both NF-κB signal pathway and HK2. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 02235234
- Volume :
- 173
- Database :
- Academic Search Index
- Journal :
- European Journal of Medicinal Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 136089171
- Full Text :
- https://doi.org/10.1016/j.ejmech.2019.04.022