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Osteoclastogenesis Modulatory Steroids from the South China Sea Gorgonian Coral Iciligorgia sp.
Authors:Congcong Xu  Jiao Li  Li Su  Hua Tang  Wen Zhang
Abstract:A new 9,11‐secosteroid, (22R)‐22‐acetoxy‐3β,6α,11‐trihydroxy‐9,11‐seco‐5α‐cholest‐7‐en‐9‐one, along with twelve known analogues were isolated from the South China Sea gorgonian coral Iciligorgia sp. Their structures were determined by the spectroscopic analysis and comparison with reported data. In an in vitro test of osteoclastic differentiation, three compounds exhibited significant down‐regulating effect whereas two compounds showed significant up‐regulating effect at 0.5 and 1.0 μm . This is the first report of the chemical investigation of the gorgonian Iciligorgia sp. The acetoxy substitution at C‐22 seems to play an important role in the regulating activity.
Keywords:gorgonian corals  Iciligorgia sp    steroids  osteoclastogenesis modulatory activity
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