Kiwifruit is an economically and nutritionally important fruit crop with extremely high contents of vitamin C.However,the previously released versions of kiwifruit genomes all have a mass of unanchored or missing regi...Kiwifruit is an economically and nutritionally important fruit crop with extremely high contents of vitamin C.However,the previously released versions of kiwifruit genomes all have a mass of unanchored or missing regions.Here,we report a highly continuous and completely gap-free reference genome of Actinidia chinensis cv.‘Hongyang’,named Hongyang v4.0,which is the first to achieve two de novo haploid-resolved haplotypes,HY4P and HY4A.HY4P and HY4A have a total length of 606.1 and 599.6 Mb,respectively,with almost the entire telomeres and centromeres assembled in each haplotype.In comparison with Hongyang v3.0,the integrity and contiguity of Hongyang v4.0 is markedly improved by filling all unclosed gaps and correcting some misoriented regions,resulting in∼38.6–39.5 Mb extra sequences,which might affect 4263 and 4244 protein-coding genes in HY4P and HY4A,respectively.Furthermore,our gap-free genome assembly provides the first clue for inspecting the structure and function of centromeres.Globally,centromeric regions are characterized by higher-order repeats that mainly consist of a 153-bp conserved centromere-specific monomer(Ach-CEN153)with different copy numbers among chromosomes.Functional enrichment analysis of the genes located within centromeric regions demonstrates that chromosome centromeres may not only play physical roles for linking a pair of sister chromatids,but also have genetic features for participation in the regulation of cell division.The availability of the telomere-to-telomere and gap-free Hongyang v4.0 reference genome lays a solid foundation not only for illustrating genome structure and functional genomics studies but also for facilitating kiwifruit breeding and improvement.展开更多
目的研究血清骨膜蛋白(Periostin)、白细胞介素(IL)-18在支气管肺发育不良(BPD)早产儿中的水平,分析二者与病情严重程度的关系及对BPD的预测价值。方法回顾性选取2019年1月至2022年1月于该院诊治的62例BPD早产儿为BPD组,以同期80例非BP...目的研究血清骨膜蛋白(Periostin)、白细胞介素(IL)-18在支气管肺发育不良(BPD)早产儿中的水平,分析二者与病情严重程度的关系及对BPD的预测价值。方法回顾性选取2019年1月至2022年1月于该院诊治的62例BPD早产儿为BPD组,以同期80例非BPD早产儿为非BPD组。根据病情严重程度,将BPD组患儿分为轻度亚组22例,中度亚组24例和重度亚组16例。采用酶联免疫吸附试验检测血清Periostin、IL-18水平。各临床参数间的相关性采用Pearson相关分析。采用多因素Logistic回归分析BPD发生的影响因素,受试者工作特征(ROC)曲线分析各指标对BPD的预测价值。结果BPD组使用肺泡表面活性物质(PS)、新生儿呼吸窘迫综合征、呼吸暂停、动脉导管未闭占比及血清Periostin、IL-18水平高于非BPD组,机械通气时间、无创呼吸支持时间、住院时间长于非BPD组,而肺功能指标[千克体重潮气量(VT/kg)、达峰时间比(TPTEF/TE)、达峰容积比(VPEF/VE)、50%潮气量时呼气流速(50%TEF)、75%潮气量时呼气流速(75%TEF)]及1、5 min Apgar评分低于非BPD组,差异均有统计学意义(P<0.05)。轻度亚组、中度亚组及重度亚组患儿血清Periostin、IL-18水平依次升高(P<0.05)。血清Periostin、IL-18水平与肺功能指标(VT/kg、50%TEF、75%TEF、TPTEF/TE、VPEF/VE)均呈负相关(P<0.05)。早产儿血清Periostin、IL-18、新生儿呼吸窘迫综合征是影响BPD发生的独立危险因素(P<0.05),使用PS是保护因素(P<0.05)。早产儿血清Periostin、IL-18、新生儿呼吸窘迫综合征是影响BPD病情严重程度的独立危险因素(P<0.05)。血清Periostin、IL-18单独及联合对BPD预测的曲线下面积(95%CI)分别为0.841(0.814~0.899)、0.863(0.820~0.897)、0.922(0.878~0.949),联合预测的灵敏度和特异度分别为0.902、0.825;二者联合对BPD预测的曲线下面积大于各指标单独预测,差异有统计学意义(Z=5.357、4.894,均P<0.001)。结论BPD患儿血清Periostin、IL-18水平升高,二者与BPD病情严重程度及肺功能有关,血清Periostin、IL-18联合对BPD具有较高的预测价值。展开更多
基金supported by funds from the National Natural Science Foundation of China(31972474,90717110)Hubei Natural Science Fund for Distinguished Young Scholars(2020CFA062).
文摘Kiwifruit is an economically and nutritionally important fruit crop with extremely high contents of vitamin C.However,the previously released versions of kiwifruit genomes all have a mass of unanchored or missing regions.Here,we report a highly continuous and completely gap-free reference genome of Actinidia chinensis cv.‘Hongyang’,named Hongyang v4.0,which is the first to achieve two de novo haploid-resolved haplotypes,HY4P and HY4A.HY4P and HY4A have a total length of 606.1 and 599.6 Mb,respectively,with almost the entire telomeres and centromeres assembled in each haplotype.In comparison with Hongyang v3.0,the integrity and contiguity of Hongyang v4.0 is markedly improved by filling all unclosed gaps and correcting some misoriented regions,resulting in∼38.6–39.5 Mb extra sequences,which might affect 4263 and 4244 protein-coding genes in HY4P and HY4A,respectively.Furthermore,our gap-free genome assembly provides the first clue for inspecting the structure and function of centromeres.Globally,centromeric regions are characterized by higher-order repeats that mainly consist of a 153-bp conserved centromere-specific monomer(Ach-CEN153)with different copy numbers among chromosomes.Functional enrichment analysis of the genes located within centromeric regions demonstrates that chromosome centromeres may not only play physical roles for linking a pair of sister chromatids,but also have genetic features for participation in the regulation of cell division.The availability of the telomere-to-telomere and gap-free Hongyang v4.0 reference genome lays a solid foundation not only for illustrating genome structure and functional genomics studies but also for facilitating kiwifruit breeding and improvement.
文摘目的研究血清骨膜蛋白(Periostin)、白细胞介素(IL)-18在支气管肺发育不良(BPD)早产儿中的水平,分析二者与病情严重程度的关系及对BPD的预测价值。方法回顾性选取2019年1月至2022年1月于该院诊治的62例BPD早产儿为BPD组,以同期80例非BPD早产儿为非BPD组。根据病情严重程度,将BPD组患儿分为轻度亚组22例,中度亚组24例和重度亚组16例。采用酶联免疫吸附试验检测血清Periostin、IL-18水平。各临床参数间的相关性采用Pearson相关分析。采用多因素Logistic回归分析BPD发生的影响因素,受试者工作特征(ROC)曲线分析各指标对BPD的预测价值。结果BPD组使用肺泡表面活性物质(PS)、新生儿呼吸窘迫综合征、呼吸暂停、动脉导管未闭占比及血清Periostin、IL-18水平高于非BPD组,机械通气时间、无创呼吸支持时间、住院时间长于非BPD组,而肺功能指标[千克体重潮气量(VT/kg)、达峰时间比(TPTEF/TE)、达峰容积比(VPEF/VE)、50%潮气量时呼气流速(50%TEF)、75%潮气量时呼气流速(75%TEF)]及1、5 min Apgar评分低于非BPD组,差异均有统计学意义(P<0.05)。轻度亚组、中度亚组及重度亚组患儿血清Periostin、IL-18水平依次升高(P<0.05)。血清Periostin、IL-18水平与肺功能指标(VT/kg、50%TEF、75%TEF、TPTEF/TE、VPEF/VE)均呈负相关(P<0.05)。早产儿血清Periostin、IL-18、新生儿呼吸窘迫综合征是影响BPD发生的独立危险因素(P<0.05),使用PS是保护因素(P<0.05)。早产儿血清Periostin、IL-18、新生儿呼吸窘迫综合征是影响BPD病情严重程度的独立危险因素(P<0.05)。血清Periostin、IL-18单独及联合对BPD预测的曲线下面积(95%CI)分别为0.841(0.814~0.899)、0.863(0.820~0.897)、0.922(0.878~0.949),联合预测的灵敏度和特异度分别为0.902、0.825;二者联合对BPD预测的曲线下面积大于各指标单独预测,差异有统计学意义(Z=5.357、4.894,均P<0.001)。结论BPD患儿血清Periostin、IL-18水平升高,二者与BPD病情严重程度及肺功能有关,血清Periostin、IL-18联合对BPD具有较高的预测价值。
