The clinic heterozygosity of multiple endocrine neoplasia type 2 (MEN2) require exploration of novel molecular mechanisms of MEN2 in addition to germline RET mutation. Our previous studies revealed and confirmed that 78% of MEN2 related tumors carried a somatic RECQL4 variation. The proposed project is to first explore the frequency of this RECQL4 variation in a large sample size of MEN2 related tumors and its correlation with the clinical manifestation; knock down RECQL4 and RET independently and simultaneously in MEN2 cell lines to investigate cell proliferation, apoptosis, invasion and karyotype, as well as molecular mechanisms; establish nude mice model and RECQL4/RET mutation double knock-in mice to observe the tumor development and progression, which might eventually offer a new target for clinical evaluation and drug development.
多内分泌腺瘤病2型(MEN2)具有显著的临床表型异质性,亟待阐明除RET基因突变外新的分子机制。课题组前期利用外显子捕获及二代测序技术,发现并证实78%的MEN2相关肿瘤细胞存在体细胞RECQL4基因变异。本课题拟以此发现为基础,首先在大样本MEN2相关肿瘤中确认RECQL4基因变异的发生率及其与MEN2临床表型的相关性;进一步,利用siRNA干扰技术分别并同时抑制RECQL4及RET基因在MEN2相关肿瘤细胞株中的表达,分析细胞的增殖、凋亡、侵袭以及核型的变化,并探讨相关分子机制;进而构建裸鼠及双基因knock-in小鼠模型,分析RECQL4基因变异与RET突变协同作用在MEN2相关肿瘤发生发展中的意义,从而最终为MEN2患者提供新的临床评估及治疗靶点。
多内分泌腺瘤病2 型(MEN2)具有显著的临床表型异质性,亟待阐明除RET 基因突变外新的分子机制。课题组前期利用外显子捕获及二代测序技术,发现并证实78%的MEN2 相关肿瘤细胞存在体细胞RECQL4 基因变异。本课题拟以此发现为基础,首先在大样本MEN2 相关肿瘤中确认RECQL4 基因变异的发生率及其与MEN2 临床表型的相关性;进一步,利用siRNA 干扰技术分别并同时抑制RECQL4 及RET 基因在MEN2 相关肿瘤细胞株中的表达,分析细胞的增殖、凋亡、侵袭以及核型的变化,并探讨相关分子机制;进而构建裸鼠及双基因knock-in 小鼠模型,分析RECQL4 基因变异与RET 突变协同作用在MEN2 相关肿瘤发生发展中的意义,从而最终为MEN2 患者提供新的临床评估及治疗靶点。
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数据更新时间:2023-05-31
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