Phytochemical and biological studies on rare and endangered plants endemic to China. Part XIV. Structurally diverse terpenoids from the twigs and needles of the endangered plant Picea brachytyla.
Phytochemistry
; 169: 112161, 2020 Jan.
Article
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| MEDLINE
| ID: mdl-31600653
ABSTRACT
A phytochemical investigation on the MeOH extract of the twigs and needles of the endangered plant Picea brachytyla led to the isolation and characterization of thirty-eight structurally diverse terpenoids. Seven of these molecules are previously undescribed, including three abietane-type (brachytylins A-C) and one labdane-type (brachytylin D) diterpenoids, an unseparated C-24 epimeric mixture of cycloartane-type triterpenoids (brachytylins E/F, ratio 11), and a rare rearranged 12(1â¯ââ¯6)-abeo-megastigmane glycoside (brachytylins G). Their structures and absolute configurations were determined by extensive spectroscopic (e.g., detailed 2D NMR and ECD) methods and/or X-ray diffraction analyses. All the isolates were evaluated for their inhibitory activities against the adenosine triphosphate (ATP)-citrate lyase (ACL) and the Src homology-2 domain containing protein tyrosine phosphatase-2 (SHP2). Among them, abiesadine J showed inhibitory effect against ACL, displaying an IC50 value of 17⯵M. 3S,23R-Dihydroxycycloart-24-en-26-oic acid exhibited inhibitory effect on SHP2, with an IC50 value of 19⯵M. Meanwhile, 3R*,23S*-dihydroxycycloart-24-en-26-oic acid was found to have inhibitory effects against both ACL and SHP2, with IC50 values of 16 and 12⯵M, respectively.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
ATP Citrato (pro-S)-Liasa
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Terpenos
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Picea
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Componentes Aéreos de las Plantas
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Inhibidores Enzimáticos
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Proteína Tirosina Fosfatasa no Receptora Tipo 11
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Fitoquímicos
Límite:
Humans
País/Región como asunto:
Asia
Idioma:
En
Revista:
Phytochemistry
Año:
2020
Tipo del documento:
Article