【广东会GDH基因检测】NF1微缺失患者的非编码RNA ANRIL和丛状神经纤维瘤的数量
基因变异引起的丛状神经纤维瘤的原理
学习肿瘤基因检测全面性的标准与实施方案记录,得知《BMC Med Genet》在. 2012 Oct 26;13:98.发表了一篇题目为《NF1微缺失患者的非编码RNA ANRIL和丛状神经纤维瘤的数量》肿瘤靶向药物治疗基因检测临床研究文章。该研究由Tanja Mußotter, Lan Kluwe, Josef Högel, Rosa Nguyen, David N Cooper, Victor-Felix Mautner, Hildegard Kehrer-Sawatzki等完成。促进了丛状神经纤维瘤的正确治疗与个性化用药的发展,进一步强调了基因信息检测与分析在丛状神经纤维瘤的早期检测与个性化治疗的重要性。
肿瘤靶向药物及正确治疗临床研究内容关键词:
NF1,微缺失,非编码RNA,ANRIL,丛状神经纤维瘤,基因检测
肿瘤靶向治疗基因检测临床应用结果
基因解码基因检测的研究介绍:1 型神经纤维瘤病 (NF1) 是由 17q11.2 的 NF1 基因突变引起的,可以通过基因检测进行分析和遗传阻断。在 95% 的初始突变引起的 NF1 患者中,NF1 突变可以通过综合突变分析基因检测来识别。这些患者中有 5-10% 存在包含 NF1 基因及其侧翼区域的微缺失。 NF1 的特征在于周围神经鞘的肿瘤,即特征性神经纤维瘤。已观察到该疾病的表征的出现在家族间和家族内有相当大的差异,这受与构成性 NF1 突变无关的遗传修饰因子的影响。 NF1 患者中丛状神经纤维瘤 (PNF) 的数量是一种高度可遗传的遗传特征。贼近,在基于家族的关联研究中,SNP rs2151280 位于非编码 RNA 基因 ANRIL 的 9p21.3 内,被确定为与丛状神经纤维瘤数密切相关。与 ANRIL 表达降低相关的 rs2151280 的 T 等位基因似乎与更高的丛状神经纤维瘤数相关。 ANRIL 直接与 SUZ12 蛋白结合,该蛋白是多梳抑制复合物 2 的重要组成部分,是 SUZ12 占据 CDKN2A/CDKN2B 肿瘤抑制基因及其表观遗传沉默所必需的。基因解码基因检测的研究方法:在这里,基因解码基因检测探索了丛状神经纤维瘤的潜在关联使用正确的 Cochran-Armitage 趋势检验和正确的 Mann-Whitney-Wilcoxon 检验,在 29 名患有组成性 NF1 微缺失的患者中使用 SNP rs2151280 的数量和丛状神经纤维瘤体积。这 29 名 NF1 患者的丛状神经纤维瘤数量和总肿瘤体积均通过全身 MRI 进行评估。在这 29 名患者中观察到的 NF1 微缺失包括 NF1 基因及其侧翼区域,包括 SUZ12 基因。基因解码基因检测的研究结果:在研究的 29 名微缺失患者中,未发现丛状神经纤维瘤数量和丛状神经纤维瘤体积与 T 等位基因相关rs2151280. 基因解码基因检测的研究结论:基因解码基因检测的研究基因解码基因检测的研究结果表明,至少在 NF1 微缺失患者中,丛状神经纤维瘤易感性与 rs2151280 无关。尽管 NF1 野生型等位基因的体细胞失活被认为是具有基因内突变的 NF1 患者和具有 NF1 微缺失的患者的 PNF 起始事件,但由于存在 SUZ12 的杂合体结构缺失,两个患者组在肿瘤进展方面可能不同仅适用于 NF1 微缺失患者。
肿瘤发生与反复转移国际数据库描述:
Background: Neurofibromatosis type-1 (NF1) is caused by mutations of the NF1 gene at 17q11.2. In 95% of non-founder NF1 patients, NF1 mutations are identifiable by means of a comprehensive mutation analysis. 5-10% of these patients harbour microdeletions encompassing the NF1 gene and its flanking regions. NF1 is characterised by tumours of the peripheral nerve sheaths, the pathognomonic neurofibromas. Considerable inter- and intra-familial variation in expressivity of the disease has been observed which is influenced by genetic modifiers unrelated to the constitutional NF1 mutation. The number of plexiform neurofibromas (PNF) in NF1 patients is a highly heritable genetic trait. Recently, SNP rs2151280 located within the non-coding RNA gene ANRIL at 9p21.3, was identified as being strongly associated with PNF number in a family-based association study. The T-allele of rs2151280, which correlates with reduced ANRIL expression, appears to be associated with higher PNF number. ANRIL directly binds to the SUZ12 protein, an essential component of polycomb repressive complex 2, and is required for SUZ12 occupancy of the CDKN2A/CDKN2B tumour suppressor genes as well as for their epigenetic silencing.Methods: Here, we explored a potential association of PNF number and PNF volume with SNP rs2151280 in 29 patients with constitutional NF1 microdeletions using the exact Cochran-Armitage test for trends and the exact Mann-Whitney-Wilcoxon test. Both the PNF number and total tumour volume in these 29 NF1 patients were assessed by whole-body MRI. The NF1 microdeletions observed in these 29 patients encompassed the NF1 gene as well as its flanking regions, including the SUZ12 gene.Results: In the 29 microdeletion patients investigated, neither the PNF number nor PNF volume was found to be associated with the T-allele of rs2151280.Conclusion: Our findings imply that, at least in patients with NF1 microdeletions, PNF susceptibility is not associated with rs2151280. Although somatic inactivation of the NF1 wild-type allele is considered to be the PNF-initiating event in NF1 patients with intragenic mutations and patients with NF1 microdeletions, both patient groups may differ with regard to tumour progression because of the heterozygous constitutional deletion of SUZ12 present only in patients with NF1 microdeletions.
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