Hypotensive Effects and Angiotensin-Converting Enzyme Inhibitory Peptides of Reishi (Ganoderma lingzhi) Auto-Digested Extract

Molecules

Hai-Bang Tran¹  Atsushi Yamamoto¹  Sayaka Matsumoto¹  Hisatomi Ito²  Kentaro Igami²  Toshitsugu Miyazaki²  Ryuichiro Kondo¹ 

[1] Faculty of Agriculture, Kyushu University, Fukuoka 812-8581, Japan; E-Mails:;Beauty Care Products Division, Nagase & Co. Ltd., Nishi-ku, Kobe, 651-2241, Japan; E-Mails:

关键词: ACE inhibitors;    hypotensive effects;    de novo sequencing;    active peptides;    auto-digested;    Ganodermataceae;    Ganoderma lingzhi;   

DOI  :  10.3390/molecules190913473

来源: mdpi

【 摘 要 】

Reishi (Ganoderma lingzhi) has been used as a traditional medicine for millennia. However, relatively little is known about this mushroom’s proteins and their bioactivities. In this study, we used reishi’s own proteases to hydrolyze its protein and obtained auto-digested reishi (ADR) extract. The extract was subjected to in vitro assays and administered to spontaneous hypertensive rats (SHRs) to determine its potential for use as a hypotensive medication. Bioassay-guided fractionation and de novo sequencing were used for identifying the active compounds. After 4 h administration of ADR, the systolic pressure of SHRs significantly decreased to 34.3 mmHg (19.5% change) and the effect was maintained up to 8 h of administration, with the decrease reaching as low as 26.8 mmHg (15% reduction–compare to base line a decrease of 26.8 mmHg is less than a decrease of 34.3 mmHg so it should give a smaller % reduction). Eleven peptides were identified and four of them showed potent inhibition against ACE with IC₅₀ values ranging from 73.1 μM to 162.7 μM. The results showed that ADR could be a good source of hypotensive peptides that could be used for antihypertensive medication or incorporation into functional foods.

【 授权许可】

CC BY   
© 2014 by the authors; licensee MDPI, Basel, Switzerland.