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Retinoblastoma genetics screening and clinical management
BMC Medical Genomics ( IF 2.7 ) Pub Date : 2021-07-22 , DOI: 10.1186/s12920-021-01034-6
Himika Gupta 1 , Sivasankar Malaichamy 2 , Ashwin Mallipatna 1 , Sakthivel Murugan 2 , Nallathambi Jeyabalan 3 , Vishnu Suresh Babu 3 , Anuprita Ghosh 3 , Arkasubhra Ghosh 3 , Sam Santhosh 2 , Somasekar Seshagiri 4 , Vedam L Ramprasad 2 , Govindasamy Kumaramanickavel 3
Affiliation  

India accounts for 20% of the global retinoblastoma (RB) burden. However, the existing data on RB1 gene germline mutations and its influence on clinical decisions is minimally explored. Fifty children with RB underwent complete clinical examination and appropriate multidisciplinary management. Screening of germline RB1 gene mutations was performed through next-generation sequencing and Multiplex Ligation-dependent Probe Amplification (MLPA) analysis. The mutation and non-mutation groups were compared for clinical parameters especially severity, progression and recurrence. Twenty-nine patients had bilateral RB (BLRB) and 21 had unilateral RB (ULRB). The genetic analysis revealed 20 RB1 variations in 29 probands, inclusive of 3 novel mutations, known 16 mutations and heterozygous whole gene deletions. The mutation detection rate (MDR) was 86.2% in BLRB and 19% in ULRB. Associations of disease recurrence (p = 0.021), progression (p = 0.000) and higher percentage of optic nerve invasion, subretinal seeds and high-risk pathological factors were observed in the mutation group. Clinical management was influenced by the presence of germline mutations, particularly while deciding on enucleation, frequency of periodic follow up and radiotherapy. We identified novel RB1 mutations, and our mutation detection rate was on par with the previous global studies. In our study, genetic results influenced clinical management and we suggest that it should be an essential and integral component of RB-care in India and elsewhere.

中文翻译:

视网膜母细胞瘤遗传学筛查和临床管理

印度占全球视网膜母细胞瘤 (RB) 负担的 20%。然而,关于 RB1 基因种系突变及其对临床决策的影响的现有数据很少被探索。50 名 RB 儿童接受了完整的临床检查和适当的多学科管理。通过下一代测序和多重连接依赖性探针扩增 (MLPA) 分析进行生殖系 RB1 基因突变的筛选。比较突变组和非突变组的临床参数,尤其是严重程度、进展和复发。29 名患者患有双侧 RB (BLRB),21 名患者患有单侧 RB (ULRB)。遗传分析揭示了 29 个先证者的 20 个 RB1 变异,包括 3 个新突变、16 个已知突变和杂合全基因缺失。突变检出率(MDR)为86。BLRB 为 2%,ULRB 为 19%。在突变组中观察到疾病复发(p = 0.021)、进展(p = 0.000)和视神经侵犯百分比、视网膜下种子和高危病理因素的相关性。临床管理受到种系突变的影响,特别是在决定去核、定期随访频率和放疗时。我们发现了新的 RB1 突变,我们的突变检测率与之前的全球研究相当。在我们的研究中,遗传结果影响了临床管理,我们建议它应该成为印度和其他地方 RB 护理的重要组成部分。突变组观察到视网膜下种子和高危病理因素。临床管理受到种系突变的影响,特别是在决定去核、定期随访频率和放疗时。我们发现了新的 RB1 突变,我们的突变检测率与之前的全球研究相当。在我们的研究中,遗传结果影响了临床管理,我们建议它应该成为印度和其他地方 RB 护理的重要组成部分。突变组观察到视网膜下种子和高危病理因素。临床管理受到种系突变的影响,特别是在决定去核、定期随访频率和放疗时。我们发现了新的 RB1 突变,我们的突变检测率与之前的全球研究相当。在我们的研究中,遗传结果影响了临床管理,我们建议它应该成为印度和其他地方 RB 护理的重要组成部分。我们的突变检测率与之前的全球研究相当。在我们的研究中,遗传结果影响了临床管理,我们建议它应该成为印度和其他地方 RB 护理的重要组成部分。我们的突变检测率与之前的全球研究相当。在我们的研究中,遗传结果影响了临床管理,我们建议它应该成为印度和其他地方 RB 护理的重要组成部分。
更新日期:2021-07-22
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