Regulation of Serotonin 1A Receptor SUMOylation by SENP2 and PIASxα

Serotonin 1A receptors (5-HT1ARs) are implicated in the control of mood, cognition, and memory and in various neuropsychiatric disorders such as depression and anxiety. As such, understanding the regulation of 5-HT1ARs will inform the development of better treatment approaches. We previously demonstrated 5-HT1ARs are SUMOylated by SUMO1 in the rat brain. Agonist stimulation increased SUMOylation and was further enhanced when combined with 17β-estradiol-3-benzoate (EB), which are treatments that cause the transient and prolonged desensitization of 5-HT1AR signaling, respectively. In the current study, we identified the protein inhibitor of activated STAT (PIAS)xα as the enzyme that facilitates SUMOylation, and SENP2 as the protein that catalyzes the deSUMOylation of 5-HT1ARs. We demonstrated that PIASxα significantly increased in the membrane fraction of rats co-treated with EB and an agonist, compared to either the EB-treated or vehicle-treated groups. The acute treatment with an agonist alone shifted the location of SENP2 from the membrane to the cytoplasmic fraction, but it has little effect on PIASxα. Hence, two separate mechanisms regulate SUMOylation and the activity of 5-HT1ARs by an agonist and EB. The effects of EB on 5-HT1AR SUMOylation and signaling may be related to the higher incidence of mood disorders in women during times with large fluctuations in estrogens. Targeting the SUMOylation of 5-HT1ARs could have important clinical relevance for the therapy for several neuropsychiatric disorders in which 5-HT1ARs are implicated.     

大鼠活化STAT蛋白抑制剂1基因重组腺病毒质粒的构建及鉴定

目的构建大鼠活化STAT蛋白抑制剂1(Protein inhibitor of activated STAT1,PIAS1)基因重组腺病毒质粒,并进行鉴定。方法应用RT-PCR法从大鼠胰腺腺泡细胞AR42J细胞株中扩增全长PIAS1基因,经T-A克隆后,亚克隆至穿梭质粒pDC316中,利用同源重组将腺病毒骨架质粒Nad5/F35和穿梭质粒pDC316-PIAS1共转染293细胞,获得重组腺病毒质粒Ad5/F35-PIAS1,经包装和扩增后,获得重组腺病毒。RT-PCR检测PIAS1基因的表达;荧光显微镜观察病毒感染情况;Western blot检测PIAS1蛋白的表达;并计算重组腺病毒的滴度。结果从AR42J细胞中扩增出1 956 bp的PIAS1基因片段,重组腺病毒质粒Ad5/F35-PIAS1经双酶切鉴定证明构建正确。RT-PCR及Western blot分析显示,PIAS1基因和蛋白已在293细胞中表达;荧光显微镜观察显示,重组腺病毒的感染率达90%;病毒滴度为4.45×1010 PFU/ml。结论已成功构建了大鼠PIAS1基因重组腺病毒质粒,为进一步研究PIAS1基因在相关疾病中的作用及其临床应用奠定了基础。     

中国智能电视姿势识别专利分析

综合运用Innography、TDA等多种分析工具,对国家知识产权局专利信息分析系统（PIAS）中的应用于智能电视的中国姿势识别专利进行趋势及创新技术人才等研究分析。针对研究发现的中国智能电视姿势识别技术正处于技术成长期,国外企业领先,国内企业核心竞争力不强,创新人才和团队分散薄弱等情况,提出了针对性的建议。