【佳學(xué)基因檢測】典型NF1患者的NF1 基因的RNA綜合分析基因檢測及其診斷和治療價值
小孩基因突變發(fā)育遲緩評價
探索腫瘤的基因組學(xué)特征與治療方案設(shè)計(jì)體會到《EBioMedicine》在 2016 May;7:212-20發(fā)表了一篇題目為《典型NF1患者的NF1 基因的RNA綜合分析基因檢測及其診斷和治療價值》腫瘤靶向藥物治療基因檢測臨床研究文章。該研究由D G Evans, N Bowers, E Burkitt-Wright, E Miles, S Garg, V Scott-Kitching, M Penman-Splitt, A Dobbie, E Howard, J Ealing, G Vassalo, A J Wallace, W Newman, Northern UK NF Research Network; S M Huson 等完成。促進(jìn)了腫瘤的正確治療與個性化用藥的發(fā)展,進(jìn)一步強(qiáng)調(diào)了基因信息檢測與分析的重要性。
腫瘤靶向藥物及正確治療臨床研究內(nèi)容關(guān)鍵詞:
咖啡斑,深內(nèi)含子,雷吉烏斯, NF1,核糖核酸, SPRED1,剪接突變。
腫瘤靶向治療基因檢測臨床應(yīng)用結(jié)果
NF1患者的基因檢測及其個性化診斷與治療的研究背景:旨在識別神經(jīng)皮膚綜合征的致病基因突變的檢出率受基因突變測試的敏感性、全面性和基于診斷標(biāo)準(zhǔn)的疾病異質(zhì)性的影響。神經(jīng)纖維瘤病類型 (NF1) 在《人的基因序列變化與人體疾病表征》中采用了由美國國立衛(wèi)生研究院 (NIH) 施行了 29 年的標(biāo)準(zhǔn),其中包括≥6 個牛奶咖啡斑 (CAL) 作為定義標(biāo)準(zhǔn)。發(fā)現(xiàn) SPRED1 是 Legius 綜合征的原因,表現(xiàn)為 CAL、雀斑和學(xué)習(xí)困難,這為 NIH 標(biāo)準(zhǔn)引入了實(shí)質(zhì)性的異質(zhì)性。I型 神經(jīng)纖維瘤的致病基因鑒定基因解碼方法:神經(jīng)纖維瘤的基因解碼及其檢測清晰界定了對符合 NIH 標(biāo)準(zhǔn)的 NF1 患者的血液進(jìn)行綜合 RNA 分析的敏感性至少一項(xiàng)非色素性標(biāo)準(zhǔn),并確定≥6 CAL 、無家族史且具有 NF1 或 SPRED1基因突變的兒童的比例。從 04/2009-12/2015 對 361 名 NF1 患者進(jìn)行 RNA 分析。神經(jīng)纖維瘤RNA基因檢測綜合分析結(jié)果:在 166/171 (97.08%-95% CI 94.56-99.6%) 的家族病例和 182/190散發(fā)性的新發(fā)病例中發(fā)現(xiàn)了NF1 突變(95.8%-95% CI 92.93-98.65%) 13 名 (15%) 突變陰性個體中有 2 名患有胚胎發(fā)育不良神經(jīng)上皮腫瘤 (DNET),而 2/348 (0.6%) 檢查出 NF1基因變異 (p=0.007)。在沒有 NF1 基因突變的 13 個個體中未發(fā)現(xiàn) SPRED1 基因檢測突變。在 71 名 0-20 歲 CAL ≥ 6 且無非色素標(biāo)準(zhǔn)的個體中,47 人(66.2%)有 NF1 基因檢測突變,6 人(8.5%)有 SPRED1 突變,18 人(25.3%)沒有致病性基因突變。使用 95.8% 的檢出率,在陰性 RNA 分析后,患有 ≥6 CAL 的兒童患有構(gòu)成性 NF1 的可能性從 2/3 下降到 1/9。神經(jīng)纖維瘤的基基因解碼分析結(jié)果:對懷疑為 NF1 的個體的 RNA 分析具有高靈敏度,并且包括一小部分具有沒有 NF1 變體的 DNET。此外,對 NF1/SPRED1 的基因檢測結(jié)果為陰性 ≥6 CAL 的兒童提供了強(qiáng)有力的高效,即他們不太可能患有 NF1。
腫瘤發(fā)生與反復(fù)轉(zhuǎn)移國際數(shù)據(jù)庫描述:
Background: The detection rate for identifying the underlying mutation in neurocutaneous syndromes is affected by the sensitivity of the mutation test and the heterogeneity of the disease based on the diagnostic criteria. Neurofibromatosis type (NF1) has been defined for 29years by the National Institutes for Health (NIH) criteria which include ≥6 Café au Lait macules (CAL) as a defining criterion. The discovery of SPRED1 as a cause of Legius syndrome which is manifested by CAL, freckling and learning difficulties has introduced substantial heterogeneity to the NIH criteria.Methods: We have defined the sensitivity of comprehensive RNA analysis on blood of presumed NF1 patients meeting NIH criteria with at least one nonpigmentary criterion and determined the proportion of children with ≥6 CAL and no family history that has an NF1 or SPRED1 genetic variant. RNA analysis was carried out from 04/2009-12/2015 on 361 NF1 patients.Findings: A presumed causative NF1 mutation was found in 166/171 (97.08%-95% CI 94.56-99.6%) of familial cases and 182/190 (95.8%-95% CI 92.93-98.65%) sporadic de novo cases. Two of thirteen (15%) mutation negative individuals had dysembryoplastic neuroepithelial tumour (DNET) compared to 2/348 (0.6%) with an NF1 variant (p=0.007). No SPRED1 variants were found in the thirteen individuals with no NF1 variant. Of seventy-one individuals with ≥6 CAL and no non-pigmentary criterion aged 0-20years, 47 (66.2%) had an NF1 variant six (8.5%) a SPRED1 variant and 18 (25.3%) no disease causing variant. Using the 95.8% detection rate the likelihood of a child with ≥6 CAL having constitutional NF1 drops from 2/3 to 1/9 after negative RNA analysis.Interpretation: RNA analysis in individuals with presumed NF1 has high sensitivity and includes a small subset with DNET without an NF1 variant. Furthermore negative analysis for NF1/SPRED1 provides strong reassurance to children with ≥6 CAL that they are unlikely to have NF1.
(責(zé)任編輯:佳學(xué)基因)