蛇毒心脏毒素对动物细胞的遗传损伤和生殖毒性研究

目的 应用眼镜蛇毒心脏毒素（ＣＴＸ）作用于小鼠的骨髓细胞和生殖细胞,以探讨ＣＴＸ对动物体的生殖毒性和遗传毒性。方法 对小鼠腹腔注射不同剂量ＣＴＸ,通过生殖毒性实验和致突变实验,分析孕鼠的胚胎存活率,骨髓细胞和精母细胞的染色体畸变率。结果：ＣＴＸ能影响胎鼠的生长发育,使孕鼠的增重和活胎率均明显地降低（Ｐ〈０．００１）,染色体畸变实验显示ＣＴＸ０．４ｍｇ／ｋｇ剂量上精母细胞多倍体和非整倍体细胞数目增高     

眼镜蛇毒细胞毒素的抗肿瘤作用

目的　研究眼镜蛇毒细胞毒素（ Ｃ Ｖ Ｃ Ｔ Ｘ）的体内抗肿瘤作用。方法　小鼠皮下、腹腔接种 Ｓ１８０ 、 Ｅ Ａ Ｃ后, 于接种部位注射不同剂量的 Ｃ Ｖ Ｃ Ｔ Ｘ, 每天 １ 次, 连续１０ 天, 观察瘤重抑制率和生命延长率。结果　适当剂量（０２～０８ｍ ｇ／ｋｇ） 的 Ｃ Ｖ Ｃ Ｔ Ｘ 能明显抑制肿瘤的生长 （ Ｐ＜ ００１）,小鼠的存活时间明显延长（ Ｐ ＜ ００１）。结论　 Ｃ Ｖ Ｃ Ｔ Ｘ 在小鼠体内对 Ｓ１８０ 、 Ｅ Ａ Ｃ有明显地抗肿瘤作用。     

MTT法测定眼镜蛇毒细胞毒素的抗癌活性

目的测定眼镜蛇毒细胞毒素（Ｃｏｂｒａｖｅｎｏｍｃｙｔｏｔｏｘｉｎ,ＣＶ－ＣＴＸ）对体外培养的人癌细胞的杀伤作用。方法溴化二苯四偶氮盐（ＭＴＴ）比色法。结果ＣＶ－ＣＴＸ对ＳＧＣ－７９０１,Ｂｅｌ－７４０２,Ｋ５６２和Ｕ９３７４种人癌细胞有很强的杀伤作用,量效关系明显,ＩＣ５０分别为４．１０,２．０８,０．２９和０．１７μｇ／ｍｌ。结论ＭＴＴ法检测ＣＶ－ＣＴＸ的抗癌活性,操作简便、快速和准确。     

梨、李两种铁甲虫

梨、李两种铁甲虫ＴＷＯＳＰＥＣＩＥＳＯＦＤＡＣＴＹＬＩＳＰＡＥＸＩＣＩＳＡＡＮＤＰＬＡＴＹＰＲＩＡＳＰ．ＯＦＰＥＡＲＡＮＤＰＬＵＭＱｉＳｈｉｃｈｅｎｇＨｕａｎｇＢａｎｇｋａｎＬｉｕＳｉＪｕｎＸｉｅＹｉｄｉ（ＦｕｊｉａｎＡｇｒｉｃｕｌｌｕｒａｌｕｎｉｖ...     

DETECTION OF INFECTIOUS VIRUS AND VIRAL RNA IN THE MYOCARDIUM OF MICE INFECTED EXPERIMENTALLY WITH COXSACKIE VIRUS’B

ＤＥＴＥＣＴＩＯＮＯＦＩＮＦＥＣＴＩＯＵＳＶＩＲＵＳＡＮＤＶＩＲＡＬＲＮＡＩＮＴＨＥＭＹＯＣＡＲＤＩＵＭＯＦＭＩＣＥＩＮＦＥＣＴＥＤＥＸＰＥＲＩＭＥＮＴＡＬＬＹＷＩＴＨＣＯＸＳＡＣＫＩＥＶＩＲＵＳ’Ｂ３ＸｉａｏｍｅｉＯｕｙａｎｇ,ＨｏｎｇｙｉＺｈａｎ...     

蛇毒心脏毒素对荷瘤小鼠的抗肿瘤作用初步研究

目的探讨蛇毒心脏毒素（ＣＴＸ）对荷瘤小鼠Ｓ１８０腹水瘤细胞生长抑制的影响。方法小鼠腹腔接种Ｓ１８０活瘤细胞,连续１０ｄ分别腹腔注射ＣＴＸ０．８ｍｇ／ｋｇ、０．４ｍｇ／ｋｇ、０．２ｍｇ／ｋｇ,分析统计荷瘤小鼠的体重变化和癌细胞死亡率,并用有丝分裂完全阻断法分析体内癌细胞的有丝分裂过程。结果ＣＴＸ各剂量组荷瘤小鼠的体重抑制和癌细胞死亡率均有明显的剂量反应关系,与对照组相比有显著的差异（Ｐ＜０．０１）;镜检发现ＣＴＸ能抑制体内癌细胞的有丝分裂,表现在０．４ｍｇ／ｋｇ和０．８ｍｇ／ｋｇ实验组腹水Ｓ１８０细胞处于有丝分裂前期和中期的细胞数量明显减少,其ＭＩ值分别为０．７１％和０．８０％,比对照组显著减少（Ｐ＜０．００１）。结论ＣＴＸ对Ｓ１８０小鼠体内癌细胞的生长有抑制和杀伤作用,并通过干扰和阻断癌细胞的有丝分裂过程,抑制腹水的生长。     

中国山西,广西美芒藻属两新种

中国山西、广西美芒藻属两新种谢树莲凌元洁（山西大学生命科学系太原０３０００６）ＴＷＯＮＥＷＳＰＥＣＩＥＳＯＦＣＯＭＰＳＯＰＯＧＯＮ（ＲＨＯＤＯＰＨＹＴＡ）ＦＲＯＭＳＨＡＮＸＩＡＮＤＧＵＡＮＧＸＩ,ＣＨＩＮＡＸＩＥＳｈｕＬｉａｎＬＩＮＧＹｕａｎＪ...     

新疆风毛菊属二新种

新疆风毛菊属二新种沈观冕（中国科学院新疆生物土壤沙漠研究所乌鲁木齐８３００１１）ＴＷＯＮＥＷＳＰＥＣＩＥＳＯＦＳＡＵＳＳＵＲＥＡＤＣ．（ＣＯＭＰＯＳＩＴＡＥ）ＦＲＯＭＸＩＮＪＩＡＮＧ,ＣＨＩＮＡＳＨＥＮＫｕａｎＭｉａｎ（ＸｉｎｊｉａｎｇＩｎｓｔｉｔ...     

镧在小麦不同部位组织细胞中X射线能谱分析

镧在小麦不同部位组织细胞中Ｘ射线能谱分析周世恭刘敏（中国科学院植物研究所北京１０００９３）关键词小麦,镧,超微结构识别,Ｘ射线能谱分析ＸＲＡＹＥＮＥＲＧＹＳＰＥＣＴＲＡＡＮＡＬＹＳＩＳＯＦＬＡＮＴＨＡＮＵＭＩＮＴＩＳＳＵＥＣＥＬＬＳＯＦＤＥＦＦＥ...     

不同光质对毛地黄愈伤组织诱导和增殖的效应

不同光质对毛地黄愈伤组织诱导和增殖的效应毛学文陈荃（天水师范高等专科学校生物系,天水７４１０００）ＥＦＦＥＣＴＳＯＦＬＩＧＨＴＱＵＡＬＩＴＹＯＮＣＡＬＬＵＳＩＮＤＵＣＴＩＯＮＡＮＤＧＲＯＷＴＨＯＦＤＩＧＩＴＡＬＳＰＵＲＰＵＲＥＡＭａｏＸｕｅ－ｗｅｎＣ...     

Investigation of the mechanism of temperature sensitivity of the electroreceptors of ampullae of lorenzini

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.