Triterpenes

Publication Title: 
Biological & Pharmaceutical Bulletin

Candida albicans is one of the most prevalent human opportunistic pathogens. C. albicans undergoes a yeast-to-hyphal transition that has been identified as a virulence factor as well as a critical element for mature biofilm formation. A previous study in our lab showed retigeric acid B (RAB), a lichen derived pentacyclic triterpenoid, displayed synergistic antifungal activity with azoles. We now showed that this combination also proved to be adequate in combating the formation of hyphae in vitro.

Author(s): 
Chang, Wenqiang
Li, Ying
Zhang, Li
Cheng, Aixia
Liu, Yongqing
Lou, Hongxiang
Publication Title: 
Annals of the New York Academy of Sciences

Dietary caloric restriction (CR) is the only intervention conclusively and reproducibly shown to slow aging and maintain health and vitality in mammals. Although this paradigm has been known for over 60 years, its precise biological mechanisms and applicability to humans remain unknown. We began addressing the latter question in 1987 with the first controlled study of CR in primates (rhesus and squirrel monkeys, which are evolutionarily much closer to humans than the rodents most frequently employed in CR studies).

Author(s): 
Roth, G. S.
Ingram, D. K.
Lane, M. A.
Publication Title: 
Planta Medica

The Mexican species GALPHIMIA GLAUCA (Cav.) Kuntze (Malphigiaceae) synthesises a family of sedative and anxiolytic nor-secofriedelanes, designated as galphimines. These active principles accumulate at low concentration in the aerial parts of plants from wild populations. Transformed calluses and cell suspension cultures of this species were established in order to induce a greater production of nor-friedelanes. The cell suspension line GgBa was selected and grown over a period of two years of continuous subculturing in MS nutrient medium in the absence of growth regulators.

Author(s): 
Ortíz, Anabel
Cardoso-Taketa, Alexandre
Monroy, Mario Rodríguez
Arellano, Jesús
Hernández, Georgina
Villarreal, María Luisa
Publication Title: 
Cell

Traditional medicines provide fertile ground for modern drug development, but first they must pass along a pathway of discovery, isolation, and mechanistic studies before eventual deployment in the clinic. Here, we highlight the challenges along this route, focusing on the compounds artemisinin, triptolide, celastrol, capsaicin, and curcumin.

Author(s): 
Corson, Timothy W.
Crews, Craig M.
Publication Title: 
Molecules (Basel, Switzerland)

More than 40% of the World population is at risk of contracting malaria, which affects primarily poor populations in tropical and subtropical areas. Antimalarial pharmacotherapy has utilised plant-derived products such as quinine and artemisinin as well as their derivatives. However, worldwide use of these antimalarials has caused the spread of resistant parasites, resulting in increased malaria morbidity and mortality.

Author(s): 
Innocente, Adrine M.
Silva, Gloria N. S.
Cruz, Laura Nogueira
Moraes, Miriam S.
Nakabashi, Myna
Sonnet, Pascal
Gosmann, Grace
Garcia, Célia R. S.
Gnoatto, Simone C. B.
Publication Title: 
Zhongguo Zhong Yao Za Zhi = Zhongguo Zhongyao Zazhi = China Journal of Chinese Materia Medica

OBJECTIVE: To isolate and elucidate the constituents from stem of Chirita longgangensis var. hongyao. METHOD: The constituents were extracted with methanol and isolated by chromatography on silica gel, Sephadex LH-20 and ODS. The structures were determined by NMR and MS spectral analysis. RESULT: Seven compounds were identified as 2-hydroxy-7-methyl-9, 10-anthraquinone (1), 2-methyl-9, 10-anthraquinone (tectoquinone) (2), ursolic acid (3), vanillic acid (4), beta-sitosteryl-D-glucoside-6'-palmitate (5), beta-sitosterol (6), daucosterol (7), respectively.

Author(s): 
Wang, Man-Yuan
Yang, Lan
Tu, You-you
Publication Title: 
Molecules (Basel, Switzerland)

Celastrol, a quinone methide triterpene isolated from Tripterygium wilfordii Hook F., has various biochemical and pharmacological activities, and is now being developed as a promising anti-tumor agent. Inhibitory activity of compounds towards UDP-glucuronosyltransferase (UGT) is an important cause of clinical drug-drug interactions and herb-drug interactions. The aim of the present study is to investigate the inhibition of celastrol towards two important UDP-glucuronosyltransferase (UGT) isoforms UGT1A6 and UGT2B7.

Author(s): 
Zhang, Yong-sheng
Tu, Yan-yang
Gao, Xing-Chun
Yuan, Jun
Li, Gang
Wang, Liang
Deng, Jian-Ping
Wang, Qi
Ma, Ru-Meng
Publication Title: 
Journal of Immunology (Baltimore, Md.: 1950)

Acetyl-11-keto-beta-boswellic acid (AKBA), a component of an Ayurvedic therapeutic plant Boswellia serrata, is a pentacyclic terpenoid active against a large number of inflammatory diseases, including cancer, arthritis, chronic colitis, ulcerative colitis, Crohn's disease, and bronchial asthma, but the mechanism is poorly understood.

Author(s): 
Takada, Yasunari
Ichikawa, Haruyo
Badmaev, Vladimir
Aggarwal, Bharat B.
Publication Title: 
Chemical & Pharmaceutical Bulletin

Extensive chromatographic screening of extracts of the fruits of the Indian Ayurvedic plant, Dendrophthoe falcata, resulted in the isolation of three new triterpenes, 3beta-acetoxy-1beta-(2-hydroxy-2-propoxy)-11alpha-hydroxy-olean-12-ene (1), 3beta-acetoxy-11alpha-ethoxy-1beta-hydroxy-olean-12-ene (2) and 3beta-acetoxy-1beta-hydroxy-11alpha-methoxy-olean-12-ene (3) along with nine known compounds, 3beta-acetoxy-1beta,11alpha-dihydroxy-olean-12-ene (4), 3beta-acetoxy-1beta,11alpha-dihydroxy-urs-12-ene (5), 3beta-acetoxy-urs-12-ene-11-one (6), 3beta-acetoxy-lup-20(29)-ene (7), 30-nor-lup-3bet

Author(s): 
Mallavadhani, Uppuluri Venkata
Narasimhan, Kilambi
Sudhakar, Akella Venkata Subrahmanya
Mahapatra, Anita
Li, Wenkui
van Breemen, Richard Bruce
Publication Title: 
Cancer Research

The role of angiogenesis in tumor growth and metastasis is well established. Identification of a small molecule that blocks tumor angiogenesis and is safe and affordable has been a challenge in drug development. In this study, we showed that acetyl-11-keto-beta-boswellic acid (AKBA), an active component from an Ayurvedic medicinal plant (Boswellia serrata), could strongly inhibit tumor angiogenesis. AKBA suppressed tumor growth in the human prostate tumor xenograft mice treated daily (10 mg/kg AKBA) after solid tumors reached approximately 100 mm(3) (n = 5).

Author(s): 
Pang, Xiufeng
Yi, Zhengfang
Zhang, Xiaoli
Sung, Bokyung
Qu, Weijing
Lian, Xiaoyuan
Aggarwal, Bharat B.
Liu, Mingyao

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