The distribution and diversity of the species are closely related to the global climate.As the most widely distributed species of Bufonidae in China,the study of the distribution pattern and habitat suitability of the...The distribution and diversity of the species are closely related to the global climate.As the most widely distributed species of Bufonidae in China,the study of the distribution pattern and habitat suitability of the Asiatic toad under climate change can help us understand the reply pattern of Bufonidae habitat to climate change.Here,combined with the Maxent model and GIS technology,the effects of climate change on the distribution pattern and habitat suitability of the Asiatic toad were comprehensively analyzed.The results show that the rainfall during the wettest season(Bio16)and the mean temperature of the driest season(Bio9)have a considerable impact on the distribution of the Asiatic toad.In the next 30 to 50 years,across the overall spacial scale of the Chinese mainland,the habitat of the Asiatic toad will be primarily in the eastern part of China and less in south part,while its distribution area will expand to the midwest and northwest parts of China.Overall,the area in which it can be distributed will be reduced and suitable habitat will shift to some regions of higher latitude and elevation.In a word,we systematically analyzed the changes of the distribution pattern and habitat suitability of the Asiatic toad with climate change,and we aim to provide data on how climatic variation may impact amphibians.展开更多
[Objectives] To establish a method for the determination of active components in toad skin. [Methods] HPLC method was used to determine the content of five active components (bufotalin, cinobufotalin, bufalin, cinobuf...[Objectives] To establish a method for the determination of active components in toad skin. [Methods] HPLC method was used to determine the content of five active components (bufotalin, cinobufotalin, bufalin, cinobufagin and resibufogenin) in toad skin. [Results] Chromatographic conditions are as follows: Agilent ZORBAX SB-C 18 chromatographic column was used;acetonitrile (A)-0.3% glacial acetic acid (B) gradient elution (0-15 min, 28%A-54%A;15-35 min, 54%A-54%A) was conducted;the flow rate was 0.6 mL/min;the detection wavelength was 296 nm;the column temperature was 30 ℃;the sample size was 10 μL. Under the above conditions, the determination method of the five components can be established at one time. [Conclusions] The method was stable and reliable, and can provide experimental basis for the development and utilization of active ingredients in toad skin.展开更多
目的:采用网络药理学及分子对接技术探索蟾酥治疗肺癌的分子作用机制。方法:通过中药与化学成分数据库、BATMAN、SwissADME、SwissTargetPrediction数据库获取并筛选蟾酥的活性成分及作用靶点;通过人类基因数据库(the human gene databa...目的:采用网络药理学及分子对接技术探索蟾酥治疗肺癌的分子作用机制。方法:通过中药与化学成分数据库、BATMAN、SwissADME、SwissTargetPrediction数据库获取并筛选蟾酥的活性成分及作用靶点;通过人类基因数据库(the human gene database,GeneCards)、在线人类孟德尔遗传数据库(online mendelian inheritance in man,OMIM)、药物靶标数据库(therapeutic targetdatabase,TTD)获取肺癌主要靶点,利用STRING平台构建共同靶点蛋白-蛋白互作网络(protein-protein interactions,PPI);运用Cytoscape 3.7.1软件构建蟾酥活性成分-肺癌-靶点交集网络;通过R语言软件对共同靶点进行基因本体(gene ontology,GO)和京都基因与基因组百科全书(kyoto encyclopedia of genes and genomes,KEGG)通路富集分析;通过AutoDock Tools 1.5.6、AutoDock vina 1.1.2进行分子对接验证。结果:共筛选出蟾酥有效活性成分19个,蟾酥作用于肺癌的靶点94个,PPI网络显示表皮生长因子受体、丝裂原活化蛋白激酶3、丝裂原活化蛋白激酶1、白细胞介素6、类固醇受体辅激活因子等为核心靶点,主要涉及肽基-酪氨酸磷酸化及修饰、丝氨酸磷酸化及修饰等生物过程;蟾酥作用于肺癌的生物学通路主要富集在PI3K/Akt、癌症蛋白聚糖、癌症MicroRNAs等信号通路;分子对接结果证明蟾酥大部分有效活性成分与核心蛋白靶点有较好的结合活性。结论:蟾酥可通过多成分、多靶点、多通路治疗肺癌。展开更多
文摘The distribution and diversity of the species are closely related to the global climate.As the most widely distributed species of Bufonidae in China,the study of the distribution pattern and habitat suitability of the Asiatic toad under climate change can help us understand the reply pattern of Bufonidae habitat to climate change.Here,combined with the Maxent model and GIS technology,the effects of climate change on the distribution pattern and habitat suitability of the Asiatic toad were comprehensively analyzed.The results show that the rainfall during the wettest season(Bio16)and the mean temperature of the driest season(Bio9)have a considerable impact on the distribution of the Asiatic toad.In the next 30 to 50 years,across the overall spacial scale of the Chinese mainland,the habitat of the Asiatic toad will be primarily in the eastern part of China and less in south part,while its distribution area will expand to the midwest and northwest parts of China.Overall,the area in which it can be distributed will be reduced and suitable habitat will shift to some regions of higher latitude and elevation.In a word,we systematically analyzed the changes of the distribution pattern and habitat suitability of the Asiatic toad with climate change,and we aim to provide data on how climatic variation may impact amphibians.
基金Supported by the Self-funded Research Project of Administration of Traditional Chinese Medicine of Guangxi Zhuang Autonomous Region(GXZYZ20210078)Key Research and Development Project of Guangxi Science and Technology Department(Guike AB19110003).
文摘[Objectives] To establish a method for the determination of active components in toad skin. [Methods] HPLC method was used to determine the content of five active components (bufotalin, cinobufotalin, bufalin, cinobufagin and resibufogenin) in toad skin. [Results] Chromatographic conditions are as follows: Agilent ZORBAX SB-C 18 chromatographic column was used;acetonitrile (A)-0.3% glacial acetic acid (B) gradient elution (0-15 min, 28%A-54%A;15-35 min, 54%A-54%A) was conducted;the flow rate was 0.6 mL/min;the detection wavelength was 296 nm;the column temperature was 30 ℃;the sample size was 10 μL. Under the above conditions, the determination method of the five components can be established at one time. [Conclusions] The method was stable and reliable, and can provide experimental basis for the development and utilization of active ingredients in toad skin.
