Taxus

Taxus
  • 文章类型: Journal Article
    Taxus,针叶树的一个属,以其药用意义而闻名,IUCN将几种物种归类为不同的威胁类别,因此面临各种保护挑战。众所周知的化疗药物紫杉醇的树皮和叶子的过度收获导致其种群减少。探索紫杉属的菌根关系至关重要,由于菌根真菌在营养中起着关键作用,增长,和生态复原力。紫杉主要与丛枝菌根真菌(AM)相关,报道表明外生菌根(EM)或双重菌根关联。这篇评论巩固了有关紫杉属物种中菌根关联的现有文献,注重结构性,生理,和分子方面。AM协会在Taxus中有据可查,影响植物生理和繁殖。相反,EM协会仍然相对缺乏研究,有限的证据表明它们的发生。该综述强调了进一步研究以阐明紫杉中双重菌根关联的重要性,强调需要进行详细的结构和生理检查,以了解它们对生长和生存的影响。
    Taxus, a genus of conifers known for its medicinal significance, faces various conservation challenges with several species classified under different threat categories by the IUCN. The overharvesting of bark and leaves for the well-known chemotherapy drug paclitaxel has resulted in its population decline. Exploring the mycorrhizal relationship in Taxus is of utmost importance, as mycorrhizal fungi play pivotal roles in nutrition, growth, and ecological resilience. Taxus predominantly associates with arbuscular mycorrhizal fungi (AM), and reports suggest ectomycorrhizal (EM) or dual mycorrhizal associations as well. This review consolidates existing literature on mycorrhizal associations in Taxus species, focusing on structural, physiological, and molecular aspects. AM associations are well-documented in Taxus, influencing plant physiology and propagation. Conversely, EM associations remain relatively understudied, with limited evidence suggesting their occurrence. The review highlights the importance of further research to elucidate dual mycorrhizal associations in Taxus, emphasizing the need for detailed structural and physiological examinations to understand their impact on growth and survival.
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  • 文章类型: Journal Article
    Taxus,也被称为“植物中的黄金”,因为著名的药物以紫杉醇和多西他赛为重点,是紫杉科的一个属,几乎分布在世界各地。这些植物在中国传统医学中占有重要地位,其产品用于治疗排尿困难,肿胀和疼痛,糖尿病,女性月经不调。为了进一步研究和更好地应用红豆杉属植物,引用的1958年至2022年的参考文献是从WebofScience收集的,中国国家知识互联网(CNKI),SciFinder,和谷歌学者,和化学结构,分布,并总结了红豆杉样品中黄酮类化合物的生物活性。到目前为止,从红豆杉属植物中鉴定出59种不同骨架的黄酮,呈现出特殊的复合分布特征。据报道,这些化合物显示出显著的抗菌作用,抗衰老,抗阿尔茨海默氏症,抗糖尿病药,抗癌,抗抑郁药,抗利什曼病,抗炎,抗伤害和抗过敏,防病毒,抗脂肪酶,神经元保护,和肝脏保护活动,以及促进黑色素生成。黄酮类化合物代表了紫杉物种利用的一个很好的例子。在未来,黄酮类化合物的进一步药理和临床实验可以促进相关药物的制备。
    Taxus, also known as \"gold in plants\" because of the famous agents with emphases on Taxol and Docetaxel, is a genus of the family Taxaceae, distributed almost around the world. The plants hold an important place in traditional medicine in China, and its products are used for treating treat dysuria, swelling and pain, diabetes, and irregular menstruation in women. In order to make a further study and better application of Taxus plants for the future, cited references from between 1958 and 2022 were collected from the Web of Science, the China National Knowledge Internet (CNKI), SciFinder, and Google Scholar, and the chemical structures, distribution, and bioactivity of flavonoids identified from Taxus samples were summed up in the research. So far, 59 flavonoids in total with different skeletons were identified from Taxus plants, presenting special characteristics of compound distribution. These compounds have been reported to display significant antibacterial, antiaging, anti-Alzheimer\'s, antidiabetes, anticancer, antidepressant, antileishmaniasis, anti-inflammatory, antinociceptive and antiallergic, antivirus, antilipase, neuronal protective, and hepatic-protective activities, as well as promotion of melanogenesis. Flavonoids represent a good example of the utilization of the Taxus species. In the future, further pharmacological and clinical experiments for flavonoids could be accomplished to promote the preparation of relative drugs.
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  • 文章类型: Case Reports
    摄入欧洲紫杉树(Taxusbaccata)的叶子会导致致命的心律失常和急性心源性休克。这种心脏毒性来自紫杉碱生物碱,可阻断心脏电压门控钠和钙通道。迅速启动静脉动脉体外膜氧合对于这些危重病人的康复至关重要,因为没有解毒剂。我们在这里报道一名39岁的红豆杉中毒后出现中毒性心源性休克的患者,通过静脉动脉体外膜氧合成功获救,神经系统完全恢复。该报告强调了中毒作为心脏骤停的可逆原因的作用,并为现有文献提供了进一步的证据,从而鼓励紫杉中毒和心源性休克患者早期使用静脉动脉体外膜氧合。
    Ingestion of leaves of the European yew tree (Taxus baccata) can result in fatal cardiac arrhythmias and acute cardiogenic shock. This cardiotoxicity derives from taxine alkaloids that block cardiac voltage-gated sodium and calcium channels. Prompt initiation of venoarterial extracorporeal membrane oxygenation is essential to bridge these critically ill patients to recovery, as there is no antidote available. We here report a 39-year old patient with toxic cardiogenic shock after yew poisoning, who was successfully rescued by venoarterial extracorporeal membrane oxygenation and had a full neurological recovery. This report emphasizes the role of intoxications as reversible causes of cardiac arrest and adds further evidence to the body of existing literature thus encouraging the early use of venoarterial extracorporeal membrane oxygenation in patients with yew poisoning and cardiogenic shock.
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  • 文章类型: Journal Article
    Taxol®, which is also known as paclitaxel, is a chemotherapeutic agent widely used to treat different cancers. Since the discovery of its antitumoral activity, Taxol® has been used to treat over one million patients, making it one of the most widely employed antitumoral drugs. Taxol® was the first microtubule targeting agent described in the literature, with its main mechanism of action consisting of the disruption of microtubule dynamics, thus inducing mitotic arrest and cell death. However, secondary mechanisms for achieving apoptosis have also been demonstrated. Despite its wide use, Taxol® has certain disadvantages. The main challenges facing Taxol® are the need to find an environmentally sustainable production method based on the use of microorganisms, increase its bioavailability without exerting adverse effects on the health of patients and minimize the resistance presented by a high percentage of cells treated with paclitaxel. This review details, in a succinct manner, the main aspects of this important drug, from its discovery to the present day. We highlight the main challenges that must be faced in the coming years, in order to increase the effectiveness of Taxol® as an anticancer agent.
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  • 文章类型: Journal Article
    Plants synthesize certain phytoconstituents for their protection, which, because they are not of primary need, are known as secondary metabolites. These secondary metabolites of plants, have often been found to have medicinal uses for human beings. One such gymnosperm having secondary metabolites of medicinal potential for humans is Taxus wallichiana (Himalayan yew). Besides being the source of taxol, this plant has been investigated for its essential oil, diterpenoids, lignans, steroids, sterols and biflavonoids. Traditionally, it is used to treat disorders of the digestive, respiratory, nervous and skeletal systems. Although pharmacologically underexplored, it has been used for antiepileptic, anti-inflammatory, anticancer, antipyretic, analgesic, immunomodulatory and antimicrobial activities. The present review compiles traditional uses, phytochemical constituents (specifically the secondary metabolites) pharmacological activities and the toxicity of T. wallichiana.
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