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《天然产物研究与开发》2016,(4)
厚朴酚作为传统中药厚朴的主要成分之一,已经被证实具有明显的抗肿瘤作用,且毒性较低,在抗肿瘤药物的研究中引起了广泛的关注。厚朴酚能够抑制肿瘤细胞的增殖和分化,诱导肿瘤细胞凋亡,抑制肿瘤的转移和肿瘤血管的形成,逆转肿瘤耐药的效果也非常显著。本文通过对厚朴酚以往的研究,主要从细胞周期阻滞,细胞凋亡,抗转移,抗血管生成等方面对其在抗肿瘤领域的进展进行综述。 相似文献
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动物类中药资源丰富,其在肿瘤治疗中取得的疗效引起医药领域广泛关注,已成为抗肿瘤药物的一个新的研究热点。然而,抗肿瘤动物类中药成分复杂,其有效成分和作用机制尚有待进一步明确。综述常用抗肿瘤动物类中药及其活性成分、抗肿瘤动物类中药作用机制与临床应用,以期为抗肿瘤动物类中药的深入研究与开发提供参考。 相似文献
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人参作为传统中药家喻户晓,其提纯的重要活性成分之一一一人参皂苷Rg3,在科研中发现,具有多方向、多“靶点”抗肿瘤作用,并在临床治疗中不断被证实和推广.目前发现:人参皂苷Rg3具有抑制肿瘤细胞增殖作用;通过激活凋亡基因活性或抑制凋亡抑制蛋白等,从而促进肿瘤细胞凋亡;抑制肿瘤细胞的侵袭和转移;抑制肿瘤血管生成因子的信号传导途径,促进肿瘤血管生成抑制因子的表达,从而抑制肿瘤新生血管形成;与部分化学药物联合,可明显提高效果,同时对临床患者无明显血液系统毒性,并提高生活质量等作用.近年临床及体外实验证明,人参皂苷Rg3对多个系统并以不同机制发挥抗肿瘤作用,而对其研究仍在不断探索新的方向.作为祖国传统中药中提纯的单体抗肿瘤药物,在现今综合抗肿瘤治疗中意义深刻. 相似文献
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肝素是一种常见的抗凝药,临床治疗和动物试验中发现肝素还具有抗肿瘤转移的作用,能显著提高肿瘤患者的生存率。在肝素多种抗肿瘤相关的生物活性中,竞争性抑制P选择素介导的肿瘤细胞的黏附作用最为关键,决定了肝素抗肿瘤转移能力的大小,这种与肝素的抗凝机制不同。通过对肝素分子基团进行化学修饰可以消除其副作用的危险,得到具有抗肿瘤转移活性的肝素衍生物。 相似文献
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应用中草药抗肿瘤的研究很早就已是医学科技工作者的重要研究领域;但是,近年来中草药抗肿瘤的研究变的越来越火热,越来越深入,许多研究工作已经不单纯局限于抗肿瘤的基本活性,更多的研究已经深入到抗肿瘤作用机理的层面;本文从中药有效成分对诱导肿瘤细胞凋亡、抑制肿瘤血管的生长、诱导肿瘤细胞分化、逆转肿瘤细胞多药耐药性、提高机体免疫力等方面对中药抗肿瘤研究的当前状况进行了综述,具体情况如下: 相似文献
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近年来,细胞凋亡已作为评估抗肿瘤药物疗效的一个重要指标,中药单体和中药复方制剂对恶性肿瘤细胞凋亡的研究是目前中药抗肿瘤作用的研究热点之一。通过对中药单体和中药复方制剂对恶性肿瘤细胞凋亡的基因调控机制研究进展的综述,探索凋亡诱导基因p53基因与凋亡抑制基因bel-2,c-myc等在细胞凋亡中的表达规律,为中药防治恶性肿瘤的研究提供思路。 相似文献
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抗肿瘤中药动物模型及机制研究进展 总被引:1,自引:0,他引:1
通过动物实验研究中药抗肿瘤作用及机制是新药开发的必要途径.本文对近年来抗肿瘤中药有效成分进行动物实验的实验模型、实验方法、疗效评价、机制研究等方面进行综述. 相似文献
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In experiments on Black Sea skates (Raja clavata), the potential of the receptor epithelium of the ampullae of Lorenzini and spike activity of single nerve fibers connected to them were investigated during electrical and temperature stimulation. Usually the potential within the canal was between 0 and –2 mV, and the input resistance of the ampulla 250–400 k. Heating of the region of the receptor epithelium was accompanied by a negative wave of potential, an increase in input resistance, and inhibition of spike activity. With worsening of the animal's condition the transepithelial potential became positive (up to +10 mV) but the input resistance of the ampulla during stimulation with a positive current was nonlinear in some cases: a regenerative spike of positive polarity appeared in the channel. During heating, the spike response was sometimes reversed in sign. It is suggested that fluctuations of the transepithelial potential and spike responses to temperature stimulation reflect changes in the potential difference on the basal membrane of the receptor cells, which is described by a relationship of the Nernst's or Goldman's equation type.I. P. Pavlov Institute of Physiology, Academy of Sciences of the USSR, Leningrad. I. M. Sechenov, Institute of Evolutionary Physiology and Biochemistry, Academy of Sciences of the USSR, Leningrad. Pacific Institute of Oceanology, Far Eastern Scientific Center, Academy of Sciences of the USSR, Vladivostok. Translated from Neirofiziologiya, Vol. 12, No. 1, pp. 67–74, January–February, 1980. 相似文献
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N. P. Vesselkin Yu. V. Natochin 《Journal of Evolutionary Biochemistry and Physiology》2010,46(6):592-603
Evolution of living organisms is closely connected with evolution of structure of the system of regulations and its mechanisms.
The functional ground of regulations is chemical signalization. As early as in unicellular organisms there is a set of signal
mechanisms providing their life activity and orientation in space and time. Subsequent evolution of ways of chemical signalization
followed the way of development of delivery pathways of chemical signal and development of mechanisms of its regulation. The
mechanism of chemical regulation of the signal interaction is discussed by the example of the specialized system of transduction
of signal from neuron to neuron, of effect of hormone on the epithelial cell and modulation of this effect. These mechanisms
are considered as the most important ways of the fine and precise adaptation of chemical signalization underlying functioning
of physiological systems and organs of the living organism 相似文献
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