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347416682: ½ð±Ò+20, ¡ï¡ï¡ïºÜÓаïÖú, ¶àлÀ² 2014-05-20 10:46:46
347416682: ½ð±Ò+20, ¡ï¡ï¡ïºÜÓаïÖú 2014-05-20 10:47:28
In the late 1960s,Cisplatin was found has curative effect to  a variety of cancers.Soon afters,plenty of Platinum derivatives were synthesized constantly.However,it's necessary to exploit new kinds of cisplatin anti-cancer drug because of its strong toxic and side effects.Steroids is a type of native compound with physiological activity,which is widely existed in creature having biological activity to various cancer cells.If combine sterides with metal effect groups,it may create a better result of suppressing tumor growth.
Based on researches on steroidal compounds against tumor  and metal complexes may have antitumor activity previously.This paper designed synthesis 23 new steroidal metal complexes and test biological activity on some of them.Four 3 - any thiourea steroidal metal complexes,nine 20 - ammonia thiourea steroidal metal complexes and ten 17 - ammonia thiourea steroidal metal complexes included and measure some compouds on antitumor activity in vitro.
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greenhand_ku: Ó¦ÖúÖ¸Êý+1, лл»ý¼«Ó¦Öú 2014-05-21 09:18:34
greenhand_ku: SFL-EPI+1, ¹ÄÀø½Ï´óƪ·ùµÄÊÖ¹¤·­ÒëÓ¦Öú 2014-05-21 09:25:20
1.Synthesising 20 - ammonia thiourea steroidal metal complexes.Puting changed pregnenolone third-substituent react with thiosemicarbazone with different substituents.And then,reacting with K2PtCl4,CuCl2¡¤2H2O,[Ru(¦Ç6-p-cymene)Cl2]2,from which we can get
8 kinds of metallic 20 - ammonia thiourea class steroid complexes.Reacting oestrone with 2 - hydrazine base pyridine,then reacting
with CuCl2¡¤2H2O,gaining 20 - hydrazine (2 -) pyridine steroidal metal complexes.We can discover that some compounds show good activity of inhibiting tumor cell proliferation from antitumor activity in vitro experiment.Such as compoud 4 and compoud 9,their IC50 figure to HELA cell is 9.5¦Ìmol/L and 4.8¦Ìmol/L.
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¡°In the late 1960s, cis-platinum (cisplatin) was found to have certain curative effect on a variety of cancers. Later, plenty of Platinum derivatives were continuously synthesized. However, owing to the strong toxicity of cis-platinum, such as the adverse effect of causing severe nausea, neurotoxicity, myelosuppression etc., it is very necessary to develop new kinds of anti-cancer platinum. Steroid, widely found in animals and plants, is a type of natural compound with a wide range of physiological activities. Besides, steroid inhibited various cancer cells. Therefore, it is hypothesized that combination of steroid with effective groups of metals might show greater inhibitory effects on tumor growth.¡±
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347416682: ½ð±Ò+20, ¡ï¡ï¡ïºÜÓаïÖú, лÀ² 2014-05-20 10:46:21
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"Based on our previous researches on anti- tumor steroidal compounds and potential anti- tumor metal complexes, 23 new steroidal metal complexes were designed and synthesized, including four 3-thiosemicarbazone steroid metal complexes, nine 20 - thiosemicarbazone steroid metal complexes and ten 17 - thiosemicarbazone steroid metal complexes. The biological activities of the 23 complexes were tested and their in-vitro anti-tumor efficacy assay was also performed. "
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"Synthesis of 20 - thiosemicarbazone steroid metal complexes: the third-substituent of pregnenolone was changed before it reacted with thiosemicarbazone with different substituents.  Then, it reacted respectively with K2PtCl4, CuCl2•2H2O and [Ru(¦Ç6-p-cymene)Cl2]2, producing 8 different 20 - thiosemicarbazone steroid metal complexes; pregnenolone was also put to reacted with 2-hydrazono-pyridine before it reacted with CuCl2•2H2O, generating 20 - hydrazine (2 -) pyridine steroidal metal complexes. In-vitro anti-tumor experiments indicated that some of the synthesized compounds showed comparatively strong inhibitory effects on the proliferation of tumor cells, with IC50 of compound 4 and 9 to HELA cell being 9.5 and 4.8¦Ìmol/L respectively.  "
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8Â¥2014-05-21 01:29:54
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