Cordycepin (3'-deoxyadenosine)

Cordycepin's AMPK-activating mechanism was elucidated by Hawley et al. (2020, Cell Chemical Biology), demonstrating direct gamma-subunit binding independent of adenosine receptor signaling. An in vitro study (Lee et al., 2019, Molecules) showed cordycepin induces apoptosis in multiple cancer cell lines at 10–100 µM via AMPK/mTOR axis. The polyadenylation termination mechanism was demonstrated by Kondrashov et al. (2012, Nature). Cordycepin is found in BOTH fruiting body and mycelium of C. militaris, with significantly higher concentrations in fruiting body (up to 8 mg/g dry weight). C. militaris contains up to 90× more cordycepin than wild O. sinensis.

Cordycepin content in C. guangdongensis is documented but substantially lower than in optimized C. militaris strains (which can reach 2–3% dry weight). Anti-inflammatory, antiviral, and antitumor activities of cordycepin have been extensively studied across Cordyceps species in both in vitro and animal models. A 2020 review in Pharmacological Research summarized over 100 studies on cordycepin bioactivity. Specific to C. guangdongensis, cordycepin contributes to the overall bioactive profile but is not the primary differentiating compound.