摘要
腺苷酸环化酶3(Adenylate cyclase 3,AC3)基因在小鼠主要嗅觉表皮(Main olfactory epithelium,MOE)内的嗅觉信号传导中起着重要作用,AC3缺失是否会导致MOE内与之相关的基因发生差异表达,尚待确定。文章利用抑制性消减杂交(Suppression subtractive hybridization,SSH)方法,以AC3敲除(AC3-/-)及其同窝出生的野生型(AC3+/+)小鼠MOE为材料,构建了正向和反向两个消减文库,采用斑点杂交对消减文库进行初步筛选,对筛选出的差异表达基因进行序列测定及生物信息学分析,并利用荧光定量PCR(qRT-PCR)方法对其进行验证。斑点杂交筛选获得了386个差异表达克隆,随机选取其中的80个进行DNA序列测定,经序列比对后发现有62个在GenBank上获得了与之相匹配的基因信息,其中24个上调差异表达克隆对应于kcnk3、mapk7、megf11等基因,38个下调差异表达克隆对应于tmem88b、c-mip、skp1a、mlycd等基因。利用Gene Ontology(GO)方法对这些差异表达基因进行蛋白功能注释,发现它们主要集中在分子结合、细胞周期、生物和细胞过程等功能方面。选取其中上调基因kcnk3和下调基因c-mip、mlycd、tmem88b及trappc5进行qRT-PCR验证。结果表明,在AC3-/-小鼠MOE内kcnk3的表达量显著上调,是对照组小鼠的1.27倍,而c-mip、mlycd、tmem88b和trappc5的表达量显著下调,为对照组小鼠的20%、7%、32%和29%。这些基因的功能与K+通道、细胞发育与分化、脂肪代谢和膜蛋白转运等密切相关。推测它们可能与AC3基因共同作用,调节小鼠MOE内的嗅觉信号传导信息。
Adenylate cyclase 3 （AC3） is one of the major players in the olfactory signaling within the main olfactory epi-thelium （MOE） of mice. However, we are not ascertained whether deficiency of AC3 will lead to the differential expression of related genes in the MOE. Forward and reverse subtractive libraries were constructed by suppression subtractive hybri-dization （SSH） approach, with MOEs from AC3-/-and AC3＋/＋mice. These two libraries were primarily screened by Dot blot, differential expressed clones were sequenced and analyzed by bioinformatics, and differential expressed genes were verified by qRT-PCR. A total of 386 differentially expressed clones were picked out after Dot blot. The DNA sequences of 80 clones randomly selected were determined, and 62 clones were identified by blasting in GenBank. We found that 24 up-regulated clones were corresponded to genes of kcnk3, mapk7, megf11, and 38 down-regulated clones were corresponded to tmem88b, c-mip, skp1a, mlycd, etc. Their functions were annotated with Gene Ontology （GO） and found to be mainly focused on mo-lecular binding, cell cycle, processes of biology and cells. Five genes （kcnk3, c-mip, mlycd, tmem88b and trappc5） were verified by qRT-PCR with individuals of AC3＋/＋and AC3-/-mice. The data indicate that kcnk3 gene is up-regulated signifi-cantly, increasing 1.27 folds compared to control mice, whereas c-mip, mlycd, tmem88b and trappc5 are down-regulated significantly, decreasing 20%, 7%, 32% and 29% compared to the AC3＋/＋mice. The functions of these genes are closely related with K＋channels, cell differentiation, metabolism of fats, membrane transportation, and so on. It is tempting to spe-culate that these genes might work together with AC3 to orchestrate the olfactory transduction signaling in the MOE.
出处
《遗传》
CAS
CSCD
北大核心
2014年第6期574-583,共10页
Hereditas（Beijing)
基金
国家自然科学基金项目(编号:31171191)
河北省自然科学基金项目(编号:C2012201106)
教育部留学人员回国启动基金项目(教外司留<2013>693号)
河北省生物工程重点学科经费资助
关键词
腺苷酸环化酶3
主要嗅觉表皮
差异表达基因
抑制性消减杂交
adenylate cyclase 3 （AC3）
main olfactory epithelium （MOE）
differentially expressed genes
suppression subtractive hybridization （SSH）
