The transcriptional cascade and regulatory loop play crucial roles in regulating plant-specialized metabolite biosynthesis.Capsaicinoids are unique to the genus Capsicum and confer a pungent flavor to its fruits.Howev...The transcriptional cascade and regulatory loop play crucial roles in regulating plant-specialized metabolite biosynthesis.Capsaicinoids are unique to the genus Capsicum and confer a pungent flavor to its fruits.However,the transcriptional regulation of capsaicinoid biosynthesis remains largely unknown.In this study,two AP2/ERF transcription factors(TFs),CaERF102 and CaERF111,were characterized for their role in the capsaicinoid biosynthesis process.Expression analysis of two ERFs and capsaicinoid biosynthetic genes(CBGs)suggested that they were associated with capsaicinoid biosynthesis.Both ERFs encode nuclear-localized proteins and function as transcriptional activators through their C-terminal activation motifs.The two ERF TFs participated in capsaicinoid biosynthesis by directly activating the promoters of key CBGs,and this activation was significantly enhanced when CaMYC2 was co-expressed.Moreover,CaERF102 and CaERF111 were found to interact with CaMYC2.This study helps elucidate the AP2/ERF TF regulatory network that governs capsaicinoid biosynthesis in Capsicum species.展开更多
目的探讨伴有MYC基因重排和11q异常的高级别B细胞淋巴瘤(high grade B cell lymphoma with concurrent MYC rearrangement and 11q aberrations,HGBCL-MYC-11q)的临床病理特征、分子遗传学特征、治疗及预后。方法收集3例HGBCL-MYC-11q...目的探讨伴有MYC基因重排和11q异常的高级别B细胞淋巴瘤(high grade B cell lymphoma with concurrent MYC rearrangement and 11q aberrations,HGBCL-MYC-11q)的临床病理特征、分子遗传学特征、治疗及预后。方法收集3例HGBCL-MYC-11q的临床资料,行HE、免疫组化EnVision法染色、EBER原位杂交和FISH检测,并复习相关文献。结果患者均为男性,年龄分别为10、61和74岁。Ann Arbor分期均为Ⅳ期。3例均为活检,分别发生于鼻咽部、上咽部和回盲部。3例形态学相似,肿瘤细胞弥漫浸润性生长,细胞中等大或中等偏大,形态较单一,细胞核圆形到稍不规则,染色质细腻,核分裂象易见;1例局灶可见坏死;1例“星空”现象明显。肿瘤细胞均表达CD20、BCL6和MUM1;2例表达CD10,2例表达BCL2;Ki67增殖指数高(例1、例3近100%,例2约70%);不表达CD3、CD30和TDT;EBER原位杂交检测均为阴性。FISH检测3例均见C-MYC基因重排及11q异常,其中1例仅见11q23.3扩增,1例仅见11q24.3缺失。随访时间1~18个月,1例死亡,2例带病生存。结论HGBCL-MYC-11q少见,形态学类似Burkitt淋巴瘤/高级别B细胞淋巴瘤,但同时伴有MYC基因重排和11q异常,应加强对该疾病的认识,提高对这类疾病的精准诊断及鉴别诊断。展开更多
基金funded by the National Natural Science Foundation of China(Grant Nos.32202502,U21A20230,32070331,32102380 and 32072580)National Key Research and Development Program(Grant No.2018YFD1000800)+3 种基金the Key-Area Research and Development Program of Guangdong Province(Grant No.2022B0202080001)the Special Fund for Seed Industry of Guangdong Province Rural Revitalization Strategy(Grant No.2022-NPY00-024)Tibet Autonomous Region of Lhasa City Science and Technology Project(Grant No.LSKJ202310)the Science and Technology Project of Bijie City(Grant No.BKK2022-3)。
文摘The transcriptional cascade and regulatory loop play crucial roles in regulating plant-specialized metabolite biosynthesis.Capsaicinoids are unique to the genus Capsicum and confer a pungent flavor to its fruits.However,the transcriptional regulation of capsaicinoid biosynthesis remains largely unknown.In this study,two AP2/ERF transcription factors(TFs),CaERF102 and CaERF111,were characterized for their role in the capsaicinoid biosynthesis process.Expression analysis of two ERFs and capsaicinoid biosynthetic genes(CBGs)suggested that they were associated with capsaicinoid biosynthesis.Both ERFs encode nuclear-localized proteins and function as transcriptional activators through their C-terminal activation motifs.The two ERF TFs participated in capsaicinoid biosynthesis by directly activating the promoters of key CBGs,and this activation was significantly enhanced when CaMYC2 was co-expressed.Moreover,CaERF102 and CaERF111 were found to interact with CaMYC2.This study helps elucidate the AP2/ERF TF regulatory network that governs capsaicinoid biosynthesis in Capsicum species.
文摘目的探讨伴有MYC基因重排和11q异常的高级别B细胞淋巴瘤(high grade B cell lymphoma with concurrent MYC rearrangement and 11q aberrations,HGBCL-MYC-11q)的临床病理特征、分子遗传学特征、治疗及预后。方法收集3例HGBCL-MYC-11q的临床资料,行HE、免疫组化EnVision法染色、EBER原位杂交和FISH检测,并复习相关文献。结果患者均为男性,年龄分别为10、61和74岁。Ann Arbor分期均为Ⅳ期。3例均为活检,分别发生于鼻咽部、上咽部和回盲部。3例形态学相似,肿瘤细胞弥漫浸润性生长,细胞中等大或中等偏大,形态较单一,细胞核圆形到稍不规则,染色质细腻,核分裂象易见;1例局灶可见坏死;1例“星空”现象明显。肿瘤细胞均表达CD20、BCL6和MUM1;2例表达CD10,2例表达BCL2;Ki67增殖指数高(例1、例3近100%,例2约70%);不表达CD3、CD30和TDT;EBER原位杂交检测均为阴性。FISH检测3例均见C-MYC基因重排及11q异常,其中1例仅见11q23.3扩增,1例仅见11q24.3缺失。随访时间1~18个月,1例死亡,2例带病生存。结论HGBCL-MYC-11q少见,形态学类似Burkitt淋巴瘤/高级别B细胞淋巴瘤,但同时伴有MYC基因重排和11q异常,应加强对该疾病的认识,提高对这类疾病的精准诊断及鉴别诊断。