Library construction is a common method used to screen target genes in molecular biology.Most library constructions are not suitable for a small DNA library(<100 base pair(bp))and low RNA library output.To maximize...Library construction is a common method used to screen target genes in molecular biology.Most library constructions are not suitable for a small DNA library(<100 base pair(bp))and low RNA library output.To maximize the library’s complexity,error-prone polymerase chain reaction(PCR)was used to increase the base mutation rate.After introducing the DNA fragments into the competent cell,the library complexity could reach 109.Library mutation rate increased exponentially with the dilution and amplification of error-prone PCR.The error-prone PCR conditions were optimized including deoxyribonucleotide triphosphate(dNTP)concentration,Mn^(2+)concentration,Mg^(2+)concentration,PCR cycle number,and primer length.Then,a RNA library with high complexity can be obtained by in vitro transcription to meet most molecular biological screening requirements,and can also be used for mRNA vaccine screening.展开更多
程序性死亡蛋白-1 (programmed death 1, PD-1)是在免疫细胞上表达的免疫抑制分子,通过参与程序性细胞凋亡过程,对活化的T淋巴细胞进行负性调控,它与程序性死亡蛋白配体1 (programmed death ligand 1, PD-L1)组成的信号通路在自身免疫...程序性死亡蛋白-1 (programmed death 1, PD-1)是在免疫细胞上表达的免疫抑制分子,通过参与程序性细胞凋亡过程,对活化的T淋巴细胞进行负性调控,它与程序性死亡蛋白配体1 (programmed death ligand 1, PD-L1)组成的信号通路在自身免疫调节、肿瘤免疫及慢性病毒感染中均起着重要的作用,是自身免疫性疾病和肿瘤的潜在药物治疗靶点。同时,T细胞持续性表达PD-1可使免疫耗竭,导致人体免疫功能下降,T细胞耗竭发生在许多肿瘤及慢性病毒感染中。本文综述了T细胞中PD-1表达水平在肺部感染性疾病治疗过程中的变化,并对未来肺部感染性疾病的临床评估和治疗提出展望。展开更多
基金Shanghai Science and Technology Commission’s“Belt and Road Initiative”International Cooperation Project,China(No.19410741800)。
文摘Library construction is a common method used to screen target genes in molecular biology.Most library constructions are not suitable for a small DNA library(<100 base pair(bp))and low RNA library output.To maximize the library’s complexity,error-prone polymerase chain reaction(PCR)was used to increase the base mutation rate.After introducing the DNA fragments into the competent cell,the library complexity could reach 109.Library mutation rate increased exponentially with the dilution and amplification of error-prone PCR.The error-prone PCR conditions were optimized including deoxyribonucleotide triphosphate(dNTP)concentration,Mn^(2+)concentration,Mg^(2+)concentration,PCR cycle number,and primer length.Then,a RNA library with high complexity can be obtained by in vitro transcription to meet most molecular biological screening requirements,and can also be used for mRNA vaccine screening.
文摘程序性死亡蛋白-1 (programmed death 1, PD-1)是在免疫细胞上表达的免疫抑制分子,通过参与程序性细胞凋亡过程,对活化的T淋巴细胞进行负性调控,它与程序性死亡蛋白配体1 (programmed death ligand 1, PD-L1)组成的信号通路在自身免疫调节、肿瘤免疫及慢性病毒感染中均起着重要的作用,是自身免疫性疾病和肿瘤的潜在药物治疗靶点。同时,T细胞持续性表达PD-1可使免疫耗竭,导致人体免疫功能下降,T细胞耗竭发生在许多肿瘤及慢性病毒感染中。本文综述了T细胞中PD-1表达水平在肺部感染性疾病治疗过程中的变化,并对未来肺部感染性疾病的临床评估和治疗提出展望。
