Cornelia de Lange综合征(CdLS)是一种罕见的先天性畸形疾病,其典型特征包括生长受限、智力迟钝、颅面异常和多毛症等。本研究报道2例CdLS患者,对其临床表现和基因变异特点进行总结,并结合相关文献进行复习。患者1,女性,5岁,因生长发育...Cornelia de Lange综合征(CdLS)是一种罕见的先天性畸形疾病,其典型特征包括生长受限、智力迟钝、颅面异常和多毛症等。本研究报道2例CdLS患者,对其临床表现和基因变异特点进行总结,并结合相关文献进行复习。患者1,女性,5岁,因生长发育缓慢就诊。查体多毛,一字眉,牙齿小、稀疏,前胸、后背可见血管瘤(约2 cm×2 cm),语言发育迟缓,智力落后;身高98 cm [≤-2标准差(SD)],体质量15 kg (-2SD~-1SD),头围46 cm (-3SD~-2SD);脑核磁共振成像(MRI)平扫显示左侧侧脑室侧后角和双侧侧脑室三角略扩大,双侧上颌窦和筛窦黏膜轻度增厚,心脏彩超显示二、三尖瓣轻度反流。患者2,女性,1个月,生后气促,软腭裂,吞咽困难及三凹征阳性,双手小、左手通贯掌、右手第5指短小,右侧髋关节外展受限,双足内翻,右眼底白斑。1个月时超声显示三尖瓣轻度反流,房间隔卵圆孔未闭。2d时脑MRI平扫显示纵裂池及天幕可见少许斑片状低信号影,少量蛛网膜下腔出血,双侧上颌窦、筛窦和中耳乳突少量积液。染色体核型分析未见明显结构及数目异常。全外显子组测序检测,患者1存在NIPBL基因c.6653_6655del杂合变异,患者2存在NIPBL基因c.337C>T杂合变异,父母均未检测到该变异。NIPBL基因变异是CdLS患者的主要遗传学病因,基因变异c.337C>T的鉴定扩展了NIPBL基因的变异谱系,为研究CdLS患者致病性基因变异提供了新证据。展开更多
为探究des(rhamnosyl)verbascoside体外抗乙型肝炎病毒(HBV)的活性作用和机制,本研究以des(rhamnosyl)verbascoside为实验药物对HepG2.2.15细胞进行干预,实验分为药物干预组和对照组,采用串联质谱标签(Tandem Mass Tag,TMT)蛋白质组学...为探究des(rhamnosyl)verbascoside体外抗乙型肝炎病毒(HBV)的活性作用和机制,本研究以des(rhamnosyl)verbascoside为实验药物对HepG2.2.15细胞进行干预,实验分为药物干预组和对照组,采用串联质谱标签(Tandem Mass Tag,TMT)蛋白质组学方法对提取的总蛋白进行分析。结果表明,共筛选得到300个差异表达蛋白,其中有109个上调蛋白,191个下调蛋白。基因本体论(Gene Ontology,GO)分析结果显示,差异蛋白主要参与DNA复制(DNA replication)、鞘糖脂代谢(Glycosphingolipid metabolic process)、细胞增殖(Cell proliferation)、寡糖分解代谢(Oligosaccharide catabolic process)等生物学过程,以及DNA聚合酶活性(DNA polymerase activity)、丝氨酸型羧肽酶活性(Serine type carboxypeptidase activity)、DNA引物酶活性(DNA primase activity)等分子功能。京都基因与基因组百科全书(Kyoto Encyclopedia of Genes and Genomes,KEGG)分析结果显示,差异蛋白主要参与细胞代谢(Metabolism)、遗传信息传导(Genetic information processing)、生物系统通路(Organismal systems)等相关信号通路。亚细胞定位分析表明,差异蛋白大多定位在细胞质和细胞核。本研究共筛选出13个与抗HBV密切相关的蛋白。通过定量蛋白组学初步揭示des(rhamnosyl)verbascoside可能通过增加HGF、SORT1、MAN2B1,减少PRIM1、PRIM2、POLA1、POLD3、POLD2、POLD1、POLE、ERCC2、LAMC1、SDC1等蛋白表达来起到体外抗HBV的作用。展开更多
The satellite transponder is a widely used module in satellite missions, and the most concerned issue is to reduce the noise of the transferred signal. Otherwise, the telemetry signal will be polluted by the noise con...The satellite transponder is a widely used module in satellite missions, and the most concerned issue is to reduce the noise of the transferred signal. Otherwise, the telemetry signal will be polluted by the noise contained in the transferred signal, and the additional power will be consumed. Therefore, a method based on wavelet packet de-noising （WPD） is introduced. Compared with other techniques, there are two features making WPD more suit- able to be applied to satellite transponders： one is the capability to deal with time-varying signals without any priori information of the input signals; the other is the capability to reduce the noise in band, even if the noise overlaps with signals in the frequency domain, which provides a great de-noising performance especially for wideband signals. Besides, an oscillation detector and an av- eraging filter are added to decrease the partial oscillation caused by the thresholding process of WPD. Simulation results show that the proposed algorithm can reduce more noises and make less distortions of the signals than other techniques. In addition, up to 12 dB additional power consumption can be reduced at -10 dB signal-to-noise ratio （SNR）.展开更多
文摘Cornelia de Lange综合征(CdLS)是一种罕见的先天性畸形疾病,其典型特征包括生长受限、智力迟钝、颅面异常和多毛症等。本研究报道2例CdLS患者,对其临床表现和基因变异特点进行总结,并结合相关文献进行复习。患者1,女性,5岁,因生长发育缓慢就诊。查体多毛,一字眉,牙齿小、稀疏,前胸、后背可见血管瘤(约2 cm×2 cm),语言发育迟缓,智力落后;身高98 cm [≤-2标准差(SD)],体质量15 kg (-2SD~-1SD),头围46 cm (-3SD~-2SD);脑核磁共振成像(MRI)平扫显示左侧侧脑室侧后角和双侧侧脑室三角略扩大,双侧上颌窦和筛窦黏膜轻度增厚,心脏彩超显示二、三尖瓣轻度反流。患者2,女性,1个月,生后气促,软腭裂,吞咽困难及三凹征阳性,双手小、左手通贯掌、右手第5指短小,右侧髋关节外展受限,双足内翻,右眼底白斑。1个月时超声显示三尖瓣轻度反流,房间隔卵圆孔未闭。2d时脑MRI平扫显示纵裂池及天幕可见少许斑片状低信号影,少量蛛网膜下腔出血,双侧上颌窦、筛窦和中耳乳突少量积液。染色体核型分析未见明显结构及数目异常。全外显子组测序检测,患者1存在NIPBL基因c.6653_6655del杂合变异,患者2存在NIPBL基因c.337C>T杂合变异,父母均未检测到该变异。NIPBL基因变异是CdLS患者的主要遗传学病因,基因变异c.337C>T的鉴定扩展了NIPBL基因的变异谱系,为研究CdLS患者致病性基因变异提供了新证据。
文摘为探究des(rhamnosyl)verbascoside体外抗乙型肝炎病毒(HBV)的活性作用和机制,本研究以des(rhamnosyl)verbascoside为实验药物对HepG2.2.15细胞进行干预,实验分为药物干预组和对照组,采用串联质谱标签(Tandem Mass Tag,TMT)蛋白质组学方法对提取的总蛋白进行分析。结果表明,共筛选得到300个差异表达蛋白,其中有109个上调蛋白,191个下调蛋白。基因本体论(Gene Ontology,GO)分析结果显示,差异蛋白主要参与DNA复制(DNA replication)、鞘糖脂代谢(Glycosphingolipid metabolic process)、细胞增殖(Cell proliferation)、寡糖分解代谢(Oligosaccharide catabolic process)等生物学过程,以及DNA聚合酶活性(DNA polymerase activity)、丝氨酸型羧肽酶活性(Serine type carboxypeptidase activity)、DNA引物酶活性(DNA primase activity)等分子功能。京都基因与基因组百科全书(Kyoto Encyclopedia of Genes and Genomes,KEGG)分析结果显示,差异蛋白主要参与细胞代谢(Metabolism)、遗传信息传导(Genetic information processing)、生物系统通路(Organismal systems)等相关信号通路。亚细胞定位分析表明,差异蛋白大多定位在细胞质和细胞核。本研究共筛选出13个与抗HBV密切相关的蛋白。通过定量蛋白组学初步揭示des(rhamnosyl)verbascoside可能通过增加HGF、SORT1、MAN2B1,减少PRIM1、PRIM2、POLA1、POLD3、POLD2、POLD1、POLE、ERCC2、LAMC1、SDC1等蛋白表达来起到体外抗HBV的作用。
基金supported by the National Natural Science Foundation of China(61401389)
文摘The satellite transponder is a widely used module in satellite missions, and the most concerned issue is to reduce the noise of the transferred signal. Otherwise, the telemetry signal will be polluted by the noise contained in the transferred signal, and the additional power will be consumed. Therefore, a method based on wavelet packet de-noising （WPD） is introduced. Compared with other techniques, there are two features making WPD more suit- able to be applied to satellite transponders： one is the capability to deal with time-varying signals without any priori information of the input signals; the other is the capability to reduce the noise in band, even if the noise overlaps with signals in the frequency domain, which provides a great de-noising performance especially for wideband signals. Besides, an oscillation detector and an av- eraging filter are added to decrease the partial oscillation caused by the thresholding process of WPD. Simulation results show that the proposed algorithm can reduce more noises and make less distortions of the signals than other techniques. In addition, up to 12 dB additional power consumption can be reduced at -10 dB signal-to-noise ratio （SNR）.
