SPAP2,a transmembrane protein,is an Ig family receptor containing both ITIMs(immunoreceptor tyrosine-based inhibition motifs) and ITAMs(immunoreceptor tyrosine-based activation motifs).The extracellular portion of SPA...SPAP2,a transmembrane protein,is an Ig family receptor containing both ITIMs(immunoreceptor tyrosine-based inhibition motifs) and ITAMs(immunoreceptor tyrosine-based activation motifs).The extracellular portion of SPAP2 contains six immunoglobulin-like domains and its intracellular segment has two ITAMs and two ITIMs.Sequence alignment with the genomic database reveals that the SPAP2 gene contains 16 exons and is localized at chromosome 1q21.SPAP2 is consisted of 734 amino acids,and the intercellular portion of SPAP2 contains 137 amino acids. Tyrosine-phosphorylated SPAP2 is specifically associated with SH2 domain-containing tyrosine kinases and SH2 domain-containing tyrosine phosphatases,which lead to the initiation of signal transduction.SPAP2CT gene was amplified by PCR with SPAP2 full-length DNA as the template and cloned to the pBluescript Ⅱ KS vector.pGex-2T-SPAP2CT,the expression vector of dissoluble fusion protein,was constructed and transferred into E.coli of DE3-plysS.The fusion protein GST-SPAP2CT was expressed efficiently and purified by FFQ ion exchange chromatography and GSH affinity chromatography.The result indicates that we have constructed steady expression vector pGex-2T-SPAP2CT, which was expressed in E.coli.The molecular weight of the dissoluble fusion protein is 46 000,the productivity of GST-SPAP2CT protein is 10% and the purity is over 90% after the purification.展开更多
目的探讨无创正压通气对慢性阻塞性肺疾病(COPD)合并肺动脉高压(PH)患者的治疗作用。方法入选对象为本科室病房2014年10月至2016年1月收治入院经治疗达到COPD稳定期且合并肺动脉高压的136例患者。所有患者通过超声心动图检查收缩期肺动...目的探讨无创正压通气对慢性阻塞性肺疾病(COPD)合并肺动脉高压(PH)患者的治疗作用。方法入选对象为本科室病房2014年10月至2016年1月收治入院经治疗达到COPD稳定期且合并肺动脉高压的136例患者。所有患者通过超声心动图检查收缩期肺动脉压(sPAP)>40 mm Hg。136例患者中男121例,女15例,平均年龄(60.3±11.3)岁,随机分为无创正压通气(NPPV)组和常规治疗组。比较两组治疗前后FEV1/预计值、氧合指数、PCO_2、sPAP、BNP指标的差异,并进行sPAP与氧合指数、PCO_2、BNP、FEV1/预计值的相关性分析。结果 (1)NPPV组治疗后与治疗前以及与常规组治疗后在氧合指数、PCO_2、BNP较前有明显改善(P<0.05),而FEV1/预计值、sPAP无统计学差异(P>0.05)。常规组治疗前后无统计学意义(P>0.05);(2)根据sPAP值分为A组(40 mm Hg<sPAP≤60 mm Hg)以及B组(sPAP>60 mm Hg)进行分层研究显示:常规组治疗前后对应A、B亚组在FEV1/预计值、氧合指数、PCO_2、BNP、sPAP均无统计学差异(P>0.05)。NPPV治疗组A组治疗后患者氧合指数、PCO_2、BNP、sPAP较治疗前及常规组A组治疗后均有改善(P<0.05);B组治疗后在氧合指数、PCO2、BNP较治疗前及常规组B组治疗后有明显改善(P<0.05),而FEV1/预计值、sPAP无统计学差异(P>0.05);(3)sPAP与氧合指数呈负相关,与BNP呈正相关(P<0.05)。结论无创正压通气治疗老年慢性阻塞性肺疾病合并轻度肺动脉高压患者安全有效,可以减低肺动脉高压。展开更多
文摘SPAP2,a transmembrane protein,is an Ig family receptor containing both ITIMs(immunoreceptor tyrosine-based inhibition motifs) and ITAMs(immunoreceptor tyrosine-based activation motifs).The extracellular portion of SPAP2 contains six immunoglobulin-like domains and its intracellular segment has two ITAMs and two ITIMs.Sequence alignment with the genomic database reveals that the SPAP2 gene contains 16 exons and is localized at chromosome 1q21.SPAP2 is consisted of 734 amino acids,and the intercellular portion of SPAP2 contains 137 amino acids. Tyrosine-phosphorylated SPAP2 is specifically associated with SH2 domain-containing tyrosine kinases and SH2 domain-containing tyrosine phosphatases,which lead to the initiation of signal transduction.SPAP2CT gene was amplified by PCR with SPAP2 full-length DNA as the template and cloned to the pBluescript Ⅱ KS vector.pGex-2T-SPAP2CT,the expression vector of dissoluble fusion protein,was constructed and transferred into E.coli of DE3-plysS.The fusion protein GST-SPAP2CT was expressed efficiently and purified by FFQ ion exchange chromatography and GSH affinity chromatography.The result indicates that we have constructed steady expression vector pGex-2T-SPAP2CT, which was expressed in E.coli.The molecular weight of the dissoluble fusion protein is 46 000,the productivity of GST-SPAP2CT protein is 10% and the purity is over 90% after the purification.
文摘目的探讨无创正压通气对慢性阻塞性肺疾病(COPD)合并肺动脉高压(PH)患者的治疗作用。方法入选对象为本科室病房2014年10月至2016年1月收治入院经治疗达到COPD稳定期且合并肺动脉高压的136例患者。所有患者通过超声心动图检查收缩期肺动脉压(sPAP)>40 mm Hg。136例患者中男121例,女15例,平均年龄(60.3±11.3)岁,随机分为无创正压通气(NPPV)组和常规治疗组。比较两组治疗前后FEV1/预计值、氧合指数、PCO_2、sPAP、BNP指标的差异,并进行sPAP与氧合指数、PCO_2、BNP、FEV1/预计值的相关性分析。结果 (1)NPPV组治疗后与治疗前以及与常规组治疗后在氧合指数、PCO_2、BNP较前有明显改善(P<0.05),而FEV1/预计值、sPAP无统计学差异(P>0.05)。常规组治疗前后无统计学意义(P>0.05);(2)根据sPAP值分为A组(40 mm Hg<sPAP≤60 mm Hg)以及B组(sPAP>60 mm Hg)进行分层研究显示:常规组治疗前后对应A、B亚组在FEV1/预计值、氧合指数、PCO_2、BNP、sPAP均无统计学差异(P>0.05)。NPPV治疗组A组治疗后患者氧合指数、PCO_2、BNP、sPAP较治疗前及常规组A组治疗后均有改善(P<0.05);B组治疗后在氧合指数、PCO2、BNP较治疗前及常规组B组治疗后有明显改善(P<0.05),而FEV1/预计值、sPAP无统计学差异(P>0.05);(3)sPAP与氧合指数呈负相关,与BNP呈正相关(P<0.05)。结论无创正压通气治疗老年慢性阻塞性肺疾病合并轻度肺动脉高压患者安全有效,可以减低肺动脉高压。
