Background ADULT syndrome （acro-dermato-ungual-lacrimal-tooth syndrome） is a rare ectodermal dysplasia disorder known as autosomal dominant inheritance. Recent studies have linked p63 gene mutation to the developmen...Background ADULT syndrome （acro-dermato-ungual-lacrimal-tooth syndrome） is a rare ectodermal dysplasia disorder known as autosomal dominant inheritance. Recent studies have linked p63 gene mutation to the development of this disease. However, the genetic characteristics of ADULT syndrome were still not well understood. Methods Mutation analysis of p63 gene in the first Chinese ADULT syndrome family was performed using direct DNA sequencing. Results The sequence analysis of exon 8 of p63 gene disclosed a heterozygous G〉A substitution at nucleotide 893 （R298Q） in the proband. In addition, a single nucleotide polymorphism （SNP） rs16864880 in the downstream flanking region （DFR） of p63 exon 8 was also identified in this family. The proband and the paternal side including her father exhibited the C/G genotype at this position. The C/G variant frequency in the paternal was significantly higher as compared with the maternal （6/10 vs 0/6, P=0.034）. Conclusions ADULT syndrome may be caused by the p63 gene mutation, and it might have closer genetic association with the paternal side in this family.展开更多
目的采用RNA干扰(RNAi)方法,研究当Delta N p63基因的表达沉默后,对人膀胱癌裸鼠皮下移植模型肿瘤的抑制作用,并检测对细胞周期素依赖性激酶4(CDK4)基因和蛋白表达的影响,进一步揭示Delta N p63基因在膀胱肿瘤中的作用机制。方法首先构...目的采用RNA干扰(RNAi)方法,研究当Delta N p63基因的表达沉默后,对人膀胱癌裸鼠皮下移植模型肿瘤的抑制作用,并检测对细胞周期素依赖性激酶4(CDK4)基因和蛋白表达的影响,进一步揭示Delta N p63基因在膀胱肿瘤中的作用机制。方法首先构建Delta N p63基因特异性短发卡RNA(shRNA)表达质粒,将表达质粒转染至裸鼠皮下移植模型肿瘤瘤体内,比较各组肿瘤体积,光镜下检测肿瘤组织病理学改变,RT-PCR方法检测CKD4基因的表达变化,Western blot和SP免疫组化检测CKD4蛋白表达变化。结果质粒注射到肿瘤8周后,治疗组、对照组与生理盐水组比较,治疗组与生理盐水组瘤体积比较差异有统计学意义(P<0.01),抑瘤率74.62%。光镜结果显示治疗组肿瘤生长受到明显抑制,细胞核分裂象明显减少,可见坏死和凋亡肿瘤细胞、局部炎症细胞浸润。RT-PCR结果显示治疗组CKD4基因表达降低,蛋白检测结果显示CKD4蛋白表达下降。结论沉默Delta N p63表达后,可显著抑制人膀胱癌裸鼠肿瘤模型中肿瘤的生长,Delta N p63可能通过抑制CKD4的表达而抑制肿瘤的细胞生长。展开更多
基金This work was supported by a grant from Guangdong Natural Science Foundation of China （No. 06022455）.
文摘Background ADULT syndrome （acro-dermato-ungual-lacrimal-tooth syndrome） is a rare ectodermal dysplasia disorder known as autosomal dominant inheritance. Recent studies have linked p63 gene mutation to the development of this disease. However, the genetic characteristics of ADULT syndrome were still not well understood. Methods Mutation analysis of p63 gene in the first Chinese ADULT syndrome family was performed using direct DNA sequencing. Results The sequence analysis of exon 8 of p63 gene disclosed a heterozygous G〉A substitution at nucleotide 893 （R298Q） in the proband. In addition, a single nucleotide polymorphism （SNP） rs16864880 in the downstream flanking region （DFR） of p63 exon 8 was also identified in this family. The proband and the paternal side including her father exhibited the C/G genotype at this position. The C/G variant frequency in the paternal was significantly higher as compared with the maternal （6/10 vs 0/6, P=0.034）. Conclusions ADULT syndrome may be caused by the p63 gene mutation, and it might have closer genetic association with the paternal side in this family.
文摘目的采用RNA干扰(RNAi)方法,研究当Delta N p63基因的表达沉默后,对人膀胱癌裸鼠皮下移植模型肿瘤的抑制作用,并检测对细胞周期素依赖性激酶4(CDK4)基因和蛋白表达的影响,进一步揭示Delta N p63基因在膀胱肿瘤中的作用机制。方法首先构建Delta N p63基因特异性短发卡RNA(shRNA)表达质粒,将表达质粒转染至裸鼠皮下移植模型肿瘤瘤体内,比较各组肿瘤体积,光镜下检测肿瘤组织病理学改变,RT-PCR方法检测CKD4基因的表达变化,Western blot和SP免疫组化检测CKD4蛋白表达变化。结果质粒注射到肿瘤8周后,治疗组、对照组与生理盐水组比较,治疗组与生理盐水组瘤体积比较差异有统计学意义(P<0.01),抑瘤率74.62%。光镜结果显示治疗组肿瘤生长受到明显抑制,细胞核分裂象明显减少,可见坏死和凋亡肿瘤细胞、局部炎症细胞浸润。RT-PCR结果显示治疗组CKD4基因表达降低,蛋白检测结果显示CKD4蛋白表达下降。结论沉默Delta N p63表达后,可显著抑制人膀胱癌裸鼠肿瘤模型中肿瘤的生长,Delta N p63可能通过抑制CKD4的表达而抑制肿瘤的细胞生长。
