Taxol is the most effective antitumor agent developed in the past three decades.It has been used for effective treatment of a variety of cancers.A taxol-producing endophytic fungus Pestalotiopsis pauciseta(strain CHP-...Taxol is the most effective antitumor agent developed in the past three decades.It has been used for effective treatment of a variety of cancers.A taxol-producing endophytic fungus Pestalotiopsis pauciseta(strain CHP-11) was isolated from the leaves of Cardiospermum helicacabum and screened for taxol production.The fungus was identified based on the morphology of the fungal culture and the characteristics of the spores and screened for taxol production.The amount of taxol produced by this endophytic fungus was quantified by HPLC and it produced 113.3 μg/L,thus the fungus can serve as a potential material for fungus engineering to improve taxol production.This fungal taxol also had strong anticancer activity against some cancer cells viz.,BT 220,H116,Int 407,HL 251 and HLK 210 tested by Apoptotic assay and it is indicated that with the increase of taxol concentration from 0.005-0.05 μmol/L,taxol induced increased cell death through apoptosis.展开更多
The dynamic effects of Ce4+ on the syntheses of soluble protein and taxol in suspension cultures of Taxus chinensis var. mairei cells were studied. The phenomena of 'partition' and 'bifurcation' were o...The dynamic effects of Ce4+ on the syntheses of soluble protein and taxol in suspension cultures of Taxus chinensis var. mairei cells were studied. The phenomena of 'partition' and 'bifurcation' were observed in studying the dynamic effect of Ce4+ on soluble protein synthesis and cell activity. That is, Ce4+ of low concentration improves the soluble protein synthetic strength and cell activity, while Ce4+ of high concentration is harmful to protein synthesis and cell activity. In addition, Ce4+ of appropriate concentration enhances taxol synthesis.展开更多
基金We thank Dr. N. Anand, Director, CAS in Botany, University of Madras for the laboratory facilities provided. One of the authors (Gangadevi) is thankful to the Ministry of Environment and Forests, Government of India for the Junior Research Fellowship during which the investigation was carried out.
文摘Taxol is the most effective antitumor agent developed in the past three decades.It has been used for effective treatment of a variety of cancers.A taxol-producing endophytic fungus Pestalotiopsis pauciseta(strain CHP-11) was isolated from the leaves of Cardiospermum helicacabum and screened for taxol production.The fungus was identified based on the morphology of the fungal culture and the characteristics of the spores and screened for taxol production.The amount of taxol produced by this endophytic fungus was quantified by HPLC and it produced 113.3 μg/L,thus the fungus can serve as a potential material for fungus engineering to improve taxol production.This fungal taxol also had strong anticancer activity against some cancer cells viz.,BT 220,H116,Int 407,HL 251 and HLK 210 tested by Apoptotic assay and it is indicated that with the increase of taxol concentration from 0.005-0.05 μmol/L,taxol induced increased cell death through apoptosis.
文摘The dynamic effects of Ce4+ on the syntheses of soluble protein and taxol in suspension cultures of Taxus chinensis var. mairei cells were studied. The phenomena of 'partition' and 'bifurcation' were observed in studying the dynamic effect of Ce4+ on soluble protein synthesis and cell activity. That is, Ce4+ of low concentration improves the soluble protein synthetic strength and cell activity, while Ce4+ of high concentration is harmful to protein synthesis and cell activity. In addition, Ce4+ of appropriate concentration enhances taxol synthesis.
