Axinella属海绵化学成分与生物活性研究进展

系统综述了海绵Axinella属的生物碱、三萜、甾体等化学成分,及其抗肿瘤、抗菌、神经保护等生物活性的研究进展,为该属海绵的深入研究提供有用资料。     

Steroids and alkaloids from the South China Sea sponge Axinella sp.

A new steroid 24β-methylcholasta-1,8,14,22,25-penten-3-one-5α-ol (1) and a new alkaloid 1-(1H-indol-3-yl)-2,3-dihydroxy-5-methyl-hexane (2), together with four known compounds, were isolated from the EtOH extract of the South China Sea sponge Axinella sp. The structures of 1 and 2 were determined on the basis of extensive spectroscopic analysis, including 1D and 2D NMR spectral data.     

南海橙色手指海绵化学成分研究

 目的 研究橙色手指海绵(Axinella sp.)的化学成分。方法 采用硅胶柱色谱、Sephadex LH-20和反相半制备HPLC等方法分离化合物,根据波谱数据确定其结构。结果 从橙色手指海绵分离得到10个化合物,鉴定为：cyclo-(Val-Pro)（1)、cyclo-(Tyr-Pro)（2)、cyclo-(Phe-Pro)（3)、cyclo-(Leu-Pro)（4)、cyclo-(Ile-Pro)（5)、2′-deoxyinosine（6)、2′-deoxyadenosine（7)、spongothymidine （8）、spongouridine （9）、2′-deoxyuridine（10）。结论 所有化合物为首次从橙色手指海绵中分离得到。     

Immunohistochemical localization of an N-acetyl amino-carbohydrate specific lectin (ACL-I) of the marine sponge Axinella corrugata

The N-acetyl amino-carbohydrate specific lectin (ACL-I) was previously identified and purified by us from the marine sponge Axinella corrugata (phylum Porifera, class Demospongiae). The distribution of the specific lectin within the tissue of the sponge was studied by bright-field optical microscopy immunohistochemistry in order to better understand its physiological role in the sponge. Polyclonal antibodies were raised against purified ACL-I in mice and tested by Western blot technique. The immunohistochemical analysis of ACL-I in cross sections of A. corrugata showed that this lectin is found inside the denominated spherulous cells, which contain vesicles that store the lectin. Some evidence is shown that ACL-I might also be present in the extracellular matrix. It was not possible to demonstrate by the immunohistochemical technique if ACL-I is colocalized in both the plasma membrane and in the cytoplasm of the spherulous cells.     

海绵Axinella verrucosa中溴吡咯生物碱的研究

目的分离鉴定海绵Axinella verrucosa中的溴吡咯生物碱,并进行体外免疫活性评价。方法利用减压柱层析、Sephdex LH-20凝胶柱层析、半制备HPLC等色谱方法分离纯化,运用NMR、MS等波谱方法并结合文献鉴定化合物结构,采用体外脾淋巴细胞增殖实验评价化合物的免疫活性。结果分离得到5个溴吡咯生物碱,分别鉴定为hymenidin(1)、stevensine(2)、4-bromopyrrole-2-carboxylic acid(3)、4,5-dibromopyrrole-2-carboxylic acid(4)和3,5-dibromo-2-pyrrolecarboxylic acid(5)。化合物1能够增强ConA诱导的T淋巴细胞增殖,化合物2能够增强LPS诱导的B淋巴细胞增殖。结论化合物4为首次从该种中分到,5为首次从该属中鉴定。化合物1和2具有一定的增强免疫作用。