排序方式: 共有3条查询结果,搜索用时 15 毫秒
1
1.
为探讨SN38与Fas介导凋亡的相互关系,并进一步探讨脂筏(富含鞘磷脂)在该过程的作用,本实验拟单独或者联合应用SN38和CH11作用于脂筏阴性和脂筏阳性的淋巴瘤细胞株WR/Fas—SM(-)细胞和WR/Fas—SMS1细胞,通过流式细胞术、DNAladder等实验方法观察SN38能否促进Fas介导的凋亡以及对2细胞的效应差异。结果显示,SN38与CHll联合应用与单独应用SN38相比,可以诱导WR/Fas—SMS1细胞更加明显凋亡现象的发生,但对WR/Fas—SM(-)细胞凋亡的促进作用不明显,提示脂筏在SN38促进WR/Fas-SMS1细胞Fas介导凋亡过程中起到一定作用。 相似文献
2.
ESASHI YOHJI; FUWA NORITOSHI; KOJIMA KAZUKO; HASE SHUU 《Journal of experimental botany》1986,37(11):1652-1662
Esashi, Y., Fuwa, Nn Kojima, K. and Hase, S. 1986. Light actionsin the germination of cocklebur seeds. IV. Disappearance ofred light-requirement for the germination of upper seeds subjectto anoxia, chilling, cyanide or azide pretreatmenLJ.exp. Bot. 37: 16521662. The effects on the germination of positively photoblastic uppercocklebur (X anthium pennsylvanicum Wallr.) seeds by pretreatingwith anoxia, chilling, cyanide or azide, which stimulates theirdark germination, were examined in relation to light actions.Prior to experiments, seeds were pre-soaked at 23 °C inthe dark for 1 or 2 weeks to remove the pre-existing Pfr. Whenthe prctreatment conditions were suboptimal for germinationinduction, the stimulating effects of the pretreatments on germinationduring a subsequent dark period at 23 °C were manifest onlywhen seeds were irradiated with red light before or after thepretreatment Red light promotion was reversed by blue or far-redlight treatment. However, both prc-chilling for 6 d at 8 °Cand prctreatment with 1· 5 mol m 3 NaN3 for 2d could induce full germination without red light exposure.On the other hand, both pre-exposure to anoxia for 8 d and pretreatmentwith 30 mol m3 KCN could induce the dark germinationonly when germination occurred at 33 °C which is known toaugment the ratio of an alternative respiration flux to a cytochromeone. Moreover, the dark germination in response to these inductionswere strongly inhibited by the inhibitors of alternative respiration,propyl gallate and benzohydroxamic acid, applied during a subsequentdark period. It was thus suggested that Pfr has some relationto the operation of two respiration systems of cocklebur seeds,but it is not indispensable to germination of this positivelyphotoblastic seed. Key words: Anoxia, azide, blue light, chilling cyanide, dark germination, far-red light, red light, seed germination, X anthium pennsylvanicum 相似文献
3.
Cells of Paramecium tetraurelia, stock hrd, cultured in a micro-capillary containing 1 μl fresh culture medium, expressed mating activity through the whole cell cycle. Mating-reactive G2 phase cells can conjugate with cells of other phases. The G2 phase cells, which have double (4C) the normal micronuclear DNA content, undergo pre-meiotic DNA synthesis when conjugated with G1 phase cells. The micronucleus of the progeny from the cross between a G1 and a G2 cell becomes triploid. 相似文献
1