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Yanyan Zheng, Li Zhu, Lulu Fan, Wenna Zhao, Jianlong Wang, Xianxiao Hao, Yunhui Zhu, Xiufang Hu, Yaofeng Yuan, Jingwei Shao, Wenfeng Wang
Emodin, a natural anthraquinone derivative isolated from Rheum palmatum L., has been demonstrated to exhibit good anti-cancer effect. In this study, a series of novel quaternary ammonium salts of emodin, anthraquinone and anthrone were synthesized and their anticancer activities were tested in vitro. The effects of emodin quaternary ammonium salts on cell viability, apoptosis, intracellular ROS, and mitochondrial membrane potential were investigated in A375, BGC-823, HepG2 and HELF cells. The results demonstrated that compound 4a induced morphological changes and decreased cell viability...
October 7, 2016: European Journal of Medicinal Chemistry
Francesca Esposito, Ilaria Carli, Claudia Del Vecchio, Lijia Xu, Angela Corona, Nicole Grandi, Dario Piano, Elias Maccioni, Simona Distinto, Cristina Parolin, Enzo Tramontano
BACKGROUND: Despite the availability of effective antiretroviral therapies, drugs for HIV-1 treatment with new mode of action are still needed. An innovative approach is aimed to identify dual HIV-1 inhibitors, small molecules that can inhibit two viral functions at the same time. Rhubarb, originated from Rheum palmatum L. and Rheum officinale Baill., is one of the earliest and most commonly used medicinal plants in Traditional Chinese Medicine (TCM) practice. We wanted to explore TCM for the identification of new chemical scaffolds with dual action abilities against HIV-1...
November 15, 2016: Phytomedicine: International Journal of Phytotherapy and Phytopharmacology
M Huang, X J Sun, Y Zhou, X M Wang
In this study, we compared the quality of DNA extracted using the modified CTAB method, from Rheum palmatum leaves preserved using fourteen different methods, including ones used commonly in other species: under ultra-cold (-80°C) temperatures, after drying with an absorbent paper, desiccating using a silica gel, drying at 60°C, in 70% ethanol, absolute ethanol, 70% ethanol supplemented with 50 mM EDTA, SDS-DNA extracting solution, nuclear separation buffer, improved NaCl-CTAB solution, TE-buffer, I-solution, or II-solution...
August 19, 2016: Genetics and Molecular Research: GMR
Birgit M Dietz, Atieh Hajirahimkhan, Tareisha L Dunlap, Judy L Bolton
Botanical dietary supplements are increasingly popular for women's health, particularly for older women. The specific botanicals women take vary as a function of age. Younger women will use botanicals for urinary tract infections, especially Vaccinium macrocarpon (cranberry), where there is evidence for efficacy. Botanical dietary supplements for premenstrual syndrome (PMS) are less commonly used, and rigorous clinical trials have not been done. Some examples include Vitex agnus-castus (chasteberry), Angelica sinensis (dong quai), Viburnum opulus/prunifolium (cramp bark and black haw), and Zingiber officinale (ginger)...
October 2016: Pharmacological Reviews
Weiru Jiang, Xiangge Tian, Yan Wang, Zheng Sun, Peipei Dong, Chao Wang, Xiaokui Huo, Baojing Zhang, Shanshan Huang, Sa Deng, Xiaobo Wang, Xiaochi Ma
Melatonin (Mel) as an endogenous hormone, has been widely used in clinic for multiple therapeutic purposes. Further, the natural anthraquinones were widespread in various plants including herbs, foods, and some flavoring agents. The present work aims to evaluate the metabolic disorder of Mel caused by various common herbs and further identify their underlying mechanism. More importantly, the relationships between inhibitory activity and their structures were also investigated. Our results demonstrate that some herbs containing anthraquinone derivatives exhibited strong inhibition on Mel metabolism...
September 12, 2016: Toxicology Letters
Tanvir R Faisal, Nicolay Hristozov, Tamara L Western, Alejandro Rey, Damiano Pasini
Plant petioles can be considered as hierarchical cellular structures, displaying geometric features defined at multiple length scales. Their macroscopic mechanical properties are the cumulative outcome of structural properties attained at each level of the structural hierarchy. This work appraises the compliance of a rhubarb stalk by determining the stalk's bending and torsional stiffness both computationally and experimentally. In our model, the irregular cross-sectional shape of the petiole and the layers of the constituent tissues are considered to evaluate the stiffness properties at the structural level...
September 14, 2016: Computer Methods in Biomechanics and Biomedical Engineering
Sun Haeng Park, Yoon-Young Sung, Seol Jang, Kyoung Jin Nho, Go Ya Choi, Ho Kyoung Kim
BACKGROUND: Do In Seung Gi-Tang (DISGT) is an herbal mixture of traditional Korean medicine that is composed of Rheum undulatum Linne, Prunus Persica (L.) Batsch, Conyza canadensis L., Cinnamomum Cassia Presl, and Glycytthiza uralensis Fischer (8: 6: 4: 4: 4 ratio). We investigated the effect of DISGT on vascular inflammation and lipid accumulation in apolipoprotein E-deficient (ApoE(-/-)) mice. METHODS: ApoE(-/-) mice that were fed a high-fat diet (HFD) were treated with DISGT (300 mg/kg/day) or statin (10 mg/kg/day) for 16 weeks...
2016: BMC Complementary and Alternative Medicine
Yingjun Li, Yulan Sun, Hui Ma, Xutao Chen, Jing Liu
As one of the most important treatment strategies in clinic, surgery has improved to be more and more efficient and safe. However, the infection risk of incision caused by surgery is still the main concern of patients. In our research, we found extract of Rheum rhabarbarum (rhubarb) could be used to diminish this risk through promoting the healing of the incision. Using MTT assay, flow cytometry and clinical statics, we also tried to explore the mechanism of rhubarb's effect. The data showed that rhubarb extract decreased the number of leukocytesand neutrophils and inhibited the growth of bacteria...
July 2016: Pakistan Journal of Pharmaceutical Sciences
Hao Sun, Guangwen Luo, Dahui Chen, Zheng Xiang
Rhein is a major medicinal ingredient isolated from several traditional Chinese medicines, including Rheum palmatum L., Aloe barbadensis Miller, Cassia angustifolia Vahl., and Polygonum multiflorum Thunb. Rhein has various pharmacological activities, such as anti-inflammatory, antitumor, antioxidant, antifibrosis, hepatoprotective, and nephroprotective activities. Although more than 100 articles in PubMed are involved in the pharmacological mechanism of action of rhein, only a few focus on the relationship of crosstalk among multiple pharmacological mechanisms...
2016: Frontiers in Pharmacology
Ah Reum Jo, Jang Hoon Kim, Xi-Tao Yan, Seo Young Yang, Young Ho Kim
Continuous efforts to identify sEH inhibitors using activity-guided fractionation have revealed 12 known compounds, 2-13, from Rheum undulatum. Compounds 2-13 and 1, which was obtained from the in-house library, were tested for inhibitory activity against sEH. Compounds 1-9, 11, and 12 were shown to have inhibitory activity, with IC50 values ranging from 2.5 ± 0.5 to 53.2 ± 4.4 μM. They were subjected to enzyme kinetic studies to explore the binding mode between the ligand and receptor. Based on our results, compounds 1, 2, 5-9, and 11 (mixed type) and compounds 3 and 12 (noncompetitive type) had a preferred allosteric site...
August 23, 2016: Journal of Enzyme Inhibition and Medicinal Chemistry
Jyh-Lurn Chang, Michael B Montalto, Peter W Heger, Eva Thiemann, Reinhard Rettenberger, Jürgen Wacker
CONTEXT: Postmarketing surveillance data for a commercially available extract of Rheum rhaponticum (ERr 731) have not been published since the beginning of the reporting in 1993 in Germany about adverse events (AEs) that were believed to be associated with it. The extract is derived from the plant's roots and is indicated for menopausal relief. In Germany, the extract has been marketed as Phytoestrol N and other related products-Phyto-Strol, Phyto-Strol Loges, and Phyto-Strol compact and as femi-loges...
June 2016: Integrative Medicine
Yan Wang, Amy O Charkowski, Cuiyun Zeng, Tiantian Zhu, Huizhen Wang, Honggang Chen
A new leaf spot disease was observed on leaves of Rheum palmatum (Chinese rhubarb) in Northwest China (Gansu Province) starting in 2005. A Septoria-like fungus was isolated and completion of Koch's postulates confirmed that the fungus was the casual agent of the leaf spot disease. Morphology and molecular methods were combined to identify the pathogen. The fungus produced conidiomata pycnidia and the conidia were 2~5 septate, 61.2~134.1 µm in length and 3.53~5.3 µm in width, which is much larger than the known Spetoria species that infects Polygonaceae species...
June 2016: Mycobiology
Feifei Ma, Lijuan Hu, Ming Yu, Feng Wang
Hypoxia-inducible factor-1 (HIF-1) is an [Formula: see text] dimeric transcription factor. Because HIF-1[Formula: see text] is instable with oxygen, HIF-1 is scarce in normal mammalian cells. However, HIF-1[Formula: see text] is expressed in pathological conditions such as cancer and obesity. Inhibiting HIF-1[Formula: see text] may be of therapeutic value for these pathologies. Here, we investigated whether emodin, derived from the herb of Rheum palmatum L, which is also known as Chinese rhubarb, and is native to China, regulates HIF-1[Formula: see text] expression...
2016: American Journal of Chinese Medicine
Zarrin Sarhadynejad, Fariba Sharififar, Abbas Pardakhty, Mohammad-Hadi Nematollahi, Saeedeh Sattaie-Mokhtari, Ali Mandegary
ETHNOPHARMACOLOGICAL RELEVANCE: "Zereshk-e-Saghir" (ZES), one of the traditional herbal medicines in old manuscripts of Persian hakims, has been used for the treatment of liver disorders. This current study is aimed to evaluate ZES effects on animal model to investigate its safety and hepatoprotective activity. MATERIALS AND METHODS: ZES was prepared according to a traditional method by blending aqueous extracts of Berberis vulgaris L., with fine particles of other plants including Rosa damascene Mill, Cichorium intybus L...
August 22, 2016: Journal of Ethnopharmacology
Bo Song, Jürg Stöcklin, Yong-Qian Gao, De-Li Peng, Min-Shu Song, Hang Sun
A prerequisite for the evolutionary stability of pollinating seed-consuming mutualisms is that each partner benefits from the association. However, few studies of such mutualism have considered the benefit gained by the pollinators. Here, we determined how the pollinating seed-predators ensure the provisioning of their offspring in the recently discovered mutualism between Rheum nobile and Bradysia flies. The correlation between flower fate and fly oviposition was examined. Floral traits and patterns of variation in fruit abortion and fly oviposition were investigated to determine whether female flies exhibit preferences for particular flowers when laying eggs...
2016: Scientific Reports
Yan Li, Yun-Xia Li, Meng-Jie Zhao, An Yuan, Xiao-Hong Gong, Meng-Jun Zhao, Cheng Peng
BACKGROUND AND OBJECTIVES: Aconitum carmichaelii Debx. (Fuzi) is usually compatible with Rheum palmatum L. (Dahuang) in clinic. The study is conducted to investigate the influence of Dahuang on the pharmacokinetics of Fuzi. METHODS: Twelve rats were randomly divided into two groups. Fuzi group was orally administered a single dose of 38.4 mg/kg total alkaloids from Fuzi, and Fuzi-Dahuang group was given 38.4 mg/kg total alkaloids from Fuzi and 76.8 mg/kg Dahuang anthraquinones at the same time...
June 29, 2016: European Journal of Drug Metabolism and Pharmacokinetics
Yu Jeong Jeong, Chul Han An, Su Gyeong Woo, Ji Hye Park, Ki-Won Lee, Sang-Hoon Lee, Yeonggil Rim, Hyung Jae Jeong, Young Bae Ryu, Cha Young Kim
The biosynthesis of flavonoids such as anthocyanin and stilbenes has attracted increasing attention because of their potential health benefits. Anthocyanins and stilbenes share common phenylpropanoid precursor pathways. We previously reported that the overexpression of sweetpotato IbMYB1a induced anthocyanin pigmentation in transgenic tobacco (Nicotiana tabacum) plants. In the present study, transgenic tobacco (Nicotiana tabacum SR1) plants (STS-OX and ROST-OX) expressing the RpSTS gene encoding stilbene synthase from rhubarb (Rheum palmatum L...
September 2016: Plant Molecular Biology
Tao Chen, Hongmei Li, Denglang Zou, Yongling Liu, Chen Chen, Guoying Zhou, Yulin Li
Anthraquinone glycosides, such as chrysophanol 1-O-β-d-glucoside, chrysophanol 8-O-β-d-glucoside, and physion 8-O-β-d-glucoside, are the accepted important active components of Rheum tanguticum Maxim. ex Balf. due to their pharmacological properties: antifungal, antimicrobial, cytotoxic, and antioxidant activities. However, an effective method for the separation of the above-mentioned anthraquinone glycosides from this herb is not currently available. Especially, greater difficulty existed in the separation of the two isomers chrysophanol 1-O-β-d-glucoside and chrysophanol 8-O-β-d-glucoside...
August 2016: Journal of Separation Science
Mengmeng Sun, Li Li, Mei Wang, Eduard van Wijk, Min He, Roeland van Wijk, Slavik Koval, Thomas Hankemeier, Jan van der Greef, Shengli Wei
To improve the quality control of herbal drugs, there has been a major shift from evaluating individual chemicals to evaluating multiple-constituent chemicals, given the multi-pharmacology nature of herbal drugs. Therefore, rapid, systematic assays are needed in order to assess the quality of medicinal herbs using a comprehensive, integrated approach. Light-induced delayed luminescence (DL) is used to measure decaying long-term ultra-weak photon emissions following excitation with light. DL is considered to be a sensitive indicator for characterizing the properties of biological systems and herbal medicines with various therapeutic properties...
September 2016: Journal of Photochemistry and Photobiology. B, Biology
Ta-Jen Lin, Chwan-Fwu Lin, Cheng-Hsun Chiu, Ming-Chung Lee, Jim-Tong Horng
Rhubarb (Rheum tanguticum; da-huang in Chinese medicine) is a herbal medicine that has been used widely for managing fever and removing toxicity. In this study, we investigated how rhubarb inhibits influenza virus during the early stage of the infectious cycle using different functional assays. A non-toxic ethanolic extract of rhubarb (Rex) inhibited several H1N1 subtypes of influenza A viruses in Madin-Darby canine kidney cells, including strains that are clinically resistant to oseltamivir. Time course analysis of Rex addition showed that viral entry was one of the steps that was inhibited by Rex...
2016: Scientific Reports
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