Starfruit (Averrhoa carambola L.) is an important fruit for Malaysian export and great attention has been made to improve starfruit fruit quality at Malaysian Agricultural Research and Development Institute (MARDI). T...Starfruit (Averrhoa carambola L.) is an important fruit for Malaysian export and great attention has been made to improve starfruit fruit quality at Malaysian Agricultural Research and Development Institute (MARDI). The current study used next generation sequencing (NGS) technologies to develop starfruit simple sequence repeat (SSR) from 2 varieties namely B11 and B17 using Illumina HiSeq. The pre-processed reads were de novo assembled to generate approximately 75,000 and 74,000 scaffolds respectively. Total genome size for B11 and B17 were around 345 Mbp and 342 Mbp based on K-mer distribution analysis. In-silico microsatellite mining of each variety has identified more than 17,000 SSR in B11 and B17 respectively. Dinucleotides were the most abundant, accounting for more than 70% of all SSR and repeat motif GA (49%) was most common. A total of 239 SSR primer pairs were designed from contigs larger than 350 nucleotides and tested for amplification. The 30 polymorphic SSRs were used to DNA fingerprint of 12 starfruit hybrids. Polymorphism information content (PIC) ranged from 0.1411 to 0.6838, with an average of 0.3919. The Unweighted Pair-Group Method for Arithmetic Averages (UPGMA) dendrogram clustered 12 starfruit accessions into 2 groups.展开更多
目的探讨杨桃根苯醌(benzoquinone of Averrhoa carambola L.root,BACR)对糖尿病小鼠的疗效及相关机制。方法小鼠尾静脉注射链脲佐菌素(STZ)建立糖尿病小鼠模型。测定小鼠空腹血糖(FBG),检测血清中甘油三酯(TG)、总胆固醇(TC)、高密度...目的探讨杨桃根苯醌(benzoquinone of Averrhoa carambola L.root,BACR)对糖尿病小鼠的疗效及相关机制。方法小鼠尾静脉注射链脲佐菌素(STZ)建立糖尿病小鼠模型。测定小鼠空腹血糖(FBG),检测血清中甘油三酯(TG)、总胆固醇(TC)、高密度脂蛋白胆固醇(HDL-C)、低密度脂蛋白胆固醇(LDL-C)、单核细胞趋化蛋白-1(MCP-1)、白介素-1β(IL-1β)水平,肝脏组织中丙二醛(MDA)、超氧化物歧化酶(SOD)、谷胱甘肽过氧化物酶(GSH-Px)活性;HE染色观察肝脏组织病理变化;免疫组化观察Toll样受体4(TLR4)、髓样分化因子(MyD88)、核转录因子-κB(NF-κB)表达差异。结果与模型组比较,BACR给药组血清中TC、TG、LDL-C、MCP-1、IL-1β及肝脏组织MDA明显降低,血清中HDL-C及肝脏中SOD、GSH-Px明显升高;HE结果显示,BACR改善肝脏组织病理情况;肝脏组织TLR4、MyD88、NF-κB蛋白表达明显减少。结论BACR对糖尿病小鼠有降糖降脂作用,其作用机制可能与抑制炎症因子释放,增强抗氧化能力有关。展开更多
文摘Starfruit (Averrhoa carambola L.) is an important fruit for Malaysian export and great attention has been made to improve starfruit fruit quality at Malaysian Agricultural Research and Development Institute (MARDI). The current study used next generation sequencing (NGS) technologies to develop starfruit simple sequence repeat (SSR) from 2 varieties namely B11 and B17 using Illumina HiSeq. The pre-processed reads were de novo assembled to generate approximately 75,000 and 74,000 scaffolds respectively. Total genome size for B11 and B17 were around 345 Mbp and 342 Mbp based on K-mer distribution analysis. In-silico microsatellite mining of each variety has identified more than 17,000 SSR in B11 and B17 respectively. Dinucleotides were the most abundant, accounting for more than 70% of all SSR and repeat motif GA (49%) was most common. A total of 239 SSR primer pairs were designed from contigs larger than 350 nucleotides and tested for amplification. The 30 polymorphic SSRs were used to DNA fingerprint of 12 starfruit hybrids. Polymorphism information content (PIC) ranged from 0.1411 to 0.6838, with an average of 0.3919. The Unweighted Pair-Group Method for Arithmetic Averages (UPGMA) dendrogram clustered 12 starfruit accessions into 2 groups.
文摘目的探讨杨桃根苯醌(benzoquinone of Averrhoa carambola L.root,BACR)对糖尿病小鼠的疗效及相关机制。方法小鼠尾静脉注射链脲佐菌素(STZ)建立糖尿病小鼠模型。测定小鼠空腹血糖(FBG),检测血清中甘油三酯(TG)、总胆固醇(TC)、高密度脂蛋白胆固醇(HDL-C)、低密度脂蛋白胆固醇(LDL-C)、单核细胞趋化蛋白-1(MCP-1)、白介素-1β(IL-1β)水平,肝脏组织中丙二醛(MDA)、超氧化物歧化酶(SOD)、谷胱甘肽过氧化物酶(GSH-Px)活性;HE染色观察肝脏组织病理变化;免疫组化观察Toll样受体4(TLR4)、髓样分化因子(MyD88)、核转录因子-κB(NF-κB)表达差异。结果与模型组比较,BACR给药组血清中TC、TG、LDL-C、MCP-1、IL-1β及肝脏组织MDA明显降低,血清中HDL-C及肝脏中SOD、GSH-Px明显升高;HE结果显示,BACR改善肝脏组织病理情况;肝脏组织TLR4、MyD88、NF-κB蛋白表达明显减少。结论BACR对糖尿病小鼠有降糖降脂作用,其作用机制可能与抑制炎症因子释放,增强抗氧化能力有关。