Identification of novel RB1 genetic variants in Retinoblastoma patients and their impact on clinical outcome
| Autor: | Swathi Kaliki, Radhika Manukonda, George Ramappa, Geeta K. Vemuganti, Akhilesh N Pujar |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Oncology
medicine.medical_specialty Retinal Neoplasms Ubiquitin-Protein Ligases DNA Mutational Analysis Childhood cancer Germline mutation Internal medicine Humans Medicine Rb1 gene Genes Retinoblastoma Child Genetics (clinical) Retrospective Studies Genetic testing medicine.diagnostic_test business.industry Retinoblastoma Genetic variants Exons medicine.disease eye diseases Tumor recurrence Retinoblastoma Binding Proteins Ophthalmology Mutation Pediatrics Perinatology and Child Health Identification (biology) Neoplasm Recurrence Local business |
| Zdroj: | Ophthalmic Genetics. 43:64-72 |
| ISSN: | 1744-5094 1381-6810 |
| Popis: | Retinoblastoma (RB) is an intraocular childhood cancer develops due to inactivation of RB1 gene. Identification of RB1 genetic variants, correlating and confirming genetic test results with clinical outcomes are crucial for effective RB management.Retrospective study of 62 RB patients and 14 family members who underwent genetic testing either by next generation sequencing (NGS) or multiplex ligation-dependent probe amplification (MLPA) or by both for screening RB1 germline mutations present in peripheral blood. Mutational outcomes were correlated with clinical outcomes evaluated over a follow-up period of 12 months.Of the 62 patients, 35 (56%) had bilateral RB and 27 (44%) had unilateral RB. Out of 24 (52%) variants detected by NGS, 9 (37.5%) were novel and 15 (62.5%) were known in 46 probands. Six (18%) gross deletions were detected by MLPA in 34 probands. The mutation detection rate by NGS and MLPA in unilateral cases was 15% (The mutations screening is important for risk assessment in future siblings and offspring of RB patients and most important in unilateral RB for determining if hereditary or not hereditary RB. Its role in predicting clinical outcomes is yet to be determined. |
| Databáze: | OpenAIRE |
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