Hu CL, Xiong J, Xiao CX, Tang Y, Ma GL, Wan J, Hu JF. Anti-neuroinflammatory diterpenoids from the endangered conifer Podocarpus imbricatus.
JOURNAL OF ASIAN NATURAL PRODUCTS RESEARCH 2018;
20:101-108. [PMID:
28470116 DOI:
10.1080/10286020.2017.1319821]
[Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/16/2016] [Accepted: 04/12/2017] [Indexed: 06/07/2023]
Abstract
Ten diterpenoids including three new abietanes (1-3) were isolated from the twigs and needles of Podocarpus imbricatus, an endangered conifer growing in a Cantonese garden. The new structures were established by means of spectroscopic methods. Among the isolates, 3β-hydroxy-abieta-8,11,13-trien-7-one (5), decandrin G (6), and 7,15-pimaradien-18-oic acid (8) showed significant anti-neuroinflammatory activities by inhibiting the overproduction of nitric oxide (NO) in lipopolysaccharide (LPS)-stimulated murine BV-2 microglial cells, with IC50 values of 3.7, 11.1, and 4.5 μM, respectively.
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