异基因

F〓 of transgenic allotetraploid fish containing"all-fish"transgene——pCAgcGHc was obtained respectively by inbreeding and gynogenesis. Positive rate of pCAgcGHc detected by PCR was 90％ in F〓 of transgenic allotetraploid fish produced by inbreeding, while most F〓 of transgenic allotetraploid fish produced by gynogenesis showed diploidy measured by flow cytometer. The results above imply that developing the pure line of transgenic allotetraploid fish through inbreeding is feasible, but the operation should be modified if gynogenesis is introduced.

采用近交和雌核发育方法培育出转pCAgcGHc基因异源四倍体鲫鲤F〓代，通过PCR检测，外源基因pCAgcGHc在近交转pCAgcGHc基因异源四倍体鲫鲤F〓中的整合率为90％，而流式细胞技术检测雌核发育转pCAgcGHc基因异源四倍体鲫鲤F〓的倍性多为二倍体，说明通过近交筛选转基因异源四倍体鲫鲤纯系的方法是可行的，但是通过雌核发育来筛选转基因异源四倍体鲫鲤纯系还要就方法上进一步的改进。

The method is simple, has safe operation, creates an approach utilizing a plant gene to safely select the marker gene for the tomato genetic transformation, can replace the disadvantages caused by the widely used heterogenous genes such as antibiotic genes, weedicide resistant genes, xyl A, pmi, GUS and so on, taken as marker genes, obtains a transgenic tomato with food safety, biological safety and ecological safety, relieves the public from anxiety of marker gene safety, and inevitably facilitates the commercialized application of the transgenic tomato.

该方法简单，操作安全，开创了利用植物基因作为番茄转化安全筛选标记基因的途径，能够代替目前广泛使用的抗生素基因、抗除草剂基因以及xylA、pmi、GUS等异源基因作为标记基因存在的弊端，获得具有食品安全性、生物安全性和生态安全性的转基因番茄，解除公众对标记基因安全性的顾虑，必将促进转基因番茄的商业化应用。

Cry8Ca2 protein encoded by the gene cry8Ca2 of Bacillus thuringiensis is a kind of insecticidal crystal protein with molecular mass of 130kDa.It is larvicidal to both Anomala corpulenta and A.exoleta .

cry8 Ca2基因是本实验室自行分离克隆的一种新型苏云金芽孢杆菌( Bacillus thuringiensis ，Bt)杀虫晶体蛋白基因，其表达130 kDa蛋白对铜绿异丽金龟和黄褐异丽金龟( A.exoleta )幼虫具有较高的活性。

A trivalent plant expression vector containing Bt cry1Ah gene, cry1Ie gene and glyphosate-tolerant 2mG2-epsps gene was constructed, glyphosate isopropylamine salt as a screening agent, 2mG2-epsps gene as a selectable maker gene. The vector was transfer into maize immature embryonic calli by microprojectile bombardment, and 69 T0 generation plants were obtained. PCR analysis showed that 17 plants had the integration of insect-resistant cry1Ah, cry1Ie gene and glyphosate-tolerance 2mG2-epsps gene.

同时构建了含有Bt cry1Ah和cry1Ie基因和耐草甘膦2mG2-epsps基因的三价植物表达载体，通过基因枪轰击法转化玉米愈伤组织，以2mG2-epsps为筛选标记基因，以草甘膦异丙胺盐作为筛选剂，获得T0代转化植株69株，PCR检测结果表明：有17株已完整的整合有抗虫基因cry1Ah、cry1Ie和耐草甘膦基因2mG2-epsps的3个目的基因，RT-PCR分析外源基因可以正确转录，已获得结实转基因植株。

Majority of acute leukemias in infant, either acute lymphoblastic leukemia or acute myeloblastic leukemia, posses a chromosomal translocation affecting the 11q23 chromosome region which specifically inoles the mixed-lineage leukemia gene.1-3 Most pediatric leukemias with MLL rearrangement clearly hae a remarkably short latency.1,4 MLL gene rearrangement is also associated with secondary leukemias of patients preiously treated with the topoisomerase II inhibitors.4 The latency of these secondary leukemias is similarly ery short.4 Of note, the concordance rate of leukemia with MLL rearrangement in infant monozygotic twins approximates to 100%,1,4 and identical breakpoint in the MLL gene was shared in these pairs of identical twin infants with concordant ALL.1,4 Moreoer, the unique and clonotypic MLL fusion gene was detectable in neonatal blood spots for Guthrie cards from non-twined indiiduals who subsequently deeloped ALL.1,4 These obserations indicate not only that MLL fusion is generated in utero but also that MLL fusion proteins could be capable of inducing leukemic transformation with few, if any, secondary mutations.2,3,4 Greaes et al speculate that an MLL fusion protein somehow promotes rapid transition to full-blown disease in patients ia ery rapid clonal expansion, genetic instability, or inhibition of DNA damage repair.4 In general, for clonal expansion of malignancies, tumor cells often hae acquired strategies that escape immune sureillance of the hosts.5,6 Immune escape mechanisms also contribute to the failure of graft-ersus-leukemia effect after allogeneic hematopoietic stem cell transplantation.7 Therefore, leukemia cells could acquire some immune escape mechanisms during leukemogenesis.

绪论 绝大多数的婴儿白血病，不管是急性淋巴性白血病或是急性骨髓性白血病，在染色体11q23部位有染色体易位的情况；这个部位的染色体易位牵连了混合谱系白血病基因。大多数具有MLL基因重排的儿童白血病潜伏期明显短很多。MLL基因重排也和经拓扑异构酶II抑制剂治疗后的继发性白血病有关。这些继发性白血病的潜伏期类似地都非常的短。很重要的是，单卵双胞胎婴儿同时患有或同时免于MLL基因重排阳性的白血病的一致性接近100%；并且同样患有ALL的同卵双胞胎的MLL基因的断裂点是一致的。而且，这种独特的克隆特异性的MLL融合基因能够从那些得ALL的非双生个体出生时的血斑标本中检测到。这些发现表明MLL融合基因产生在胎儿还在子宫的是后，而且MLL融合蛋白能过和其他的基因突变一起诱导白血病的产生。Greaes 等推测MLL融合蛋白在某种情况下同过快速克隆增殖，遗传的不稳定性或是DNA损伤修复的抑制促使疾病迅速地全面爆发。恶性肿瘤细胞的克隆增殖通常已经获得了逃避机体免疫监视的能力。免疫逃避机制也归因于异体外周血干细胞移植后移植物抗白血病作用的失效。所以，白血病细胞在白血病的产生过程中可能获得了某些免疫逃脱机制。

Therefore, in recently, the immune mechanisms of acute graft-versus-host disease have become the highpoint in the immune-transplantation.

目的： 探讨细胞因子IL-2、TNF-α、IL-10、IL-8及Th细胞亚群在异基因造血干细胞移植后aGVHD发病机理中的作用。

The accumulated evidence that environmental controls decrease the risk of lifethreatening fungal infections in the most severely immunocompromised patients(allogeneic hematopoietic stem-cell transplant patients) led to the update on the components of the Protective Environment.

最新证据表明环境控制能降低大多数免疫低下病人真菌感染的危险性（异基因造血干细胞移植患者），导致更新环境预防的部分。

According to correlative literatures, the diagnosis and treatment of bronchiolitis obliterans syndrome in three patients with hematological malignancies after allo-HSCT were analyzed. The function of haematopoiesis re-established successfully. The acute graft versus host disease did not occur in these patients except one patient occurred grade Ⅱ aGVHD, and the chronic graft versus host disease occurred in the 5th, 6th and 6th months after allo-HSCT respectively, but the cGVHD was recrudescent after treatment. The bronchiolitis obliterans syndrome occurred in the 9th, 7th and 11th months after allo-HSCT respectively, and they received the treatment of immunosuppressive, immune human serum globulin, azithromycin and to breathe in β2 receptor agonist and budesonide.

结合相关文献，对3例恶性血液病患者异基因造血干细胞移植后发生闭塞性细支气管炎综合征的临床特点和诊断治疗进行分析。3例患者移植后造血功能均顺利重建，2例未发生急性移植物抗宿主病，1例发生II度急性移植物抗宿主病；3例患者分别于移植后5，6，6个月发生广泛型慢性移植物抗宿主病，经治疗后病情仍有反复；3例患者分别于移植后9，7，11个月发生闭塞性细支气管炎综合征，给予免疫抑制剂、静脉免疫球蛋白、阿奇霉素及局部使用β2受体激动剂及布地奈德吸入治疗，2例在治疗4周后病情有所改善，另1例病情无改善。

ALA-PDT alleviated GVHD following allo-BMT and preserved GVL in ALL mice One-way mixed lymphocytes predisposed with ALA-PDT and marrow cells from the donors were infused into ALL mice. The body weight increase, haematogenesis recovery and survival time were better then all the other groups.

ALA-PDT减轻急性淋巴细胞白血病(acute lymphoblastic leukemia，ALL)小鼠同种异基因骨髓移植后GVHD反应，并且保留了GVL效应将经过ALA-PDT处理过的单向混合淋巴细胞联合供鼠的骨髓细胞输注给ALL小鼠体内，ALL受鼠的体重增长情况、造血功能恢复情况及无病生存时间等指标明显好于对照组。

To determined the role of this gene in gluconeogenesis and in pathogenesis of Xcc, mutants of pgi gene were constructed by homology plasmid integration method.

六磷酸葡萄糖异构酶是糖异生途径中另一个关键酶，在野油菜黄单胞菌中编码该酶的基因是pgi基因(Xcc 8004基因组中基因编号为XC2379)。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失