Cistanches Herba: A Neuropharmacology Review
Cistanches Herba: A Neuropharmacology Review Cistanche extract products (family Orobanchaceae), commonly known as “desert ginseng” or Rou Cong Rong, is a global genus and commonly used for its neuroprotective, immunomodulatory, anti-oxidative, kidney impotence, laxative, anti-inflammatory, hepatoprotective, anti-bacterial, anti-viral, and anti-tumor effects in traditional herbal formulations in North Africa, Arabic, and Asian countries. The major bioactive compound present in this plant is phenylethanoid glycosides. In recent years, there has been great important in scientific investigation of the neuropharmacological effects of the bioactive compounds. The in vitro and in vivo studies suggests these compounds demonstrate neuropharmacological activities against a wide range of complex nervous system diseases which occurs through different mechanisms include improving immunity function and kidney aging, anti-lipid peroxidation, scavenging free radical, inducing the activation of caspase-3 and caspase-8. This review aims to summaries the various neuropharmacological effects and mechanisms of Cistanches Herba extracts and related compounds, including its efficacy as a cure for Alzheimer’s disease and Parkinson’s disease with reference to the published literature. Which provides guidance for further research on the clinical application of Cistanches Herba. Introduction Cistanches Herba, the dried stem of Cistanches species Cistanche deserticola Y.C.Ma (Figure 1) and Cistanche raw materials, is recorded in the Chinese Pharmacopeia (Committee, 2015). Other non-official species, such as C. sinensis Beck and C. salsa (C. A. Mey) Beck, are also used as Cistanches Herba in certain regions of China due to resource shortage. Cistanches Herba is one of the most valuable herbal drugs in traditional Chinese medicine, which supplements kidney functions, boosts the essence of blood, and moistens the large intestines to free stool (Medicine, 2005). Therefore, it is called “desert ginseng” in China because of the excellent medicinal functions and nourishing effects (Wang et al., 2012). Cistanches Herba, a global genus of holoparasitic desert plant, which is primarily endemic in North Africa, Arabic, and Asian countries (Nan et al., 2013). The primary producing areas of Cistanches Herba in China are Inner Mongolia and the provinces of Xinjiang, Gansu and Qinghai. Several chemical groups were isolated from Cistanches Herba, including PhGs (Figure 1), lignans, iridoids, and polysaccharides (Chen et al., 2013). Pharmacological studies demonstrated that Cistanches Herba exhibits neuroprotective, kidney impotence, laxative, anti-inflammatory, hepatoprotective, immunomodulatory, anti-oxidative, anti-bacterial, anti-viral, and anti-tumor effects (Hu and Feng, 2012). And our previous studies have distinguished Cistanches Herba from different geographic origins using a combination of DNA barcoding and UPLC-Q-TOF/MS technology. The Consumer Price Indexdatabase of China reports that 58 drugs from 12 different groups, including glycosides of Cistanche capsules and compound Cistanche Yizhicapsules, are authorized for the treatment of AD. Cistanches Herba wine and tea are produced in Alashan, Inner Mongolia, China, which might assist in Runchang catharsis and enhance the immune, endocrine regulation, and anti-aging systems of the body. Boschnalosides used as a therapeutic agent in Japan to treat sexual dysfunction and amnesia, and echinacoside is used in healthcare products in the United States to improve immunity (Cheng et al., 2005). Some researchers recently focused on the neuroprotective effects of Cistanche health products, but these effects have not been studied thoroughly (Table 1). This review presents and analyzes recent developments in the neuropharmacology of Cistanches Herba and provides a reference for the further study and clinical application of this medicinal plant. Cistanches Herba medicines have a long history of practical use, but scientists worldwide only began to disclose their chemical composition in the1980s. Figure 2 shows an analysis of the related literature. The cumulative histogram shows the number of studies increased over time, and the Chinese literature occupies the greatest proportion, which reveals the potential research value of Cistanches Herba. Figure 2A shows that the neuropharmacology related literature occupies the largest proportion of the nine areas of pharmacology, and this topic has become the most important area for research. Figure 2B exhibits the chemical research diversity of Cistanches Herba, with a substantial proportion of research on content determination. Further research may focus on neuropharmacology and component content. Cistanches Herba has a long history as a medicinal plant in China and Japan because of its wide spectrum of pharmacological activities. It is commonly called Rou Cong Rong in Chinese, and it was first listed medicinal use as a tonic agent in the Chinese Materia Medica Shen Nong’s Herbal Classic (Estern Han Dynasty) 2000 years ago, and later recorded in Yao Xing Lun in 1590. The Compendium of Materia Medica (Ben Cao Gang Mu, 1619) documented that Cistanches Herba invigorated the kidney to treat kidney deficiencies and geriatric constipation strengthened and nourished marrow and essence, protected semen, and moistened dryness to relax the bowels.
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