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Singh L, Chinnaswamy G, Meel R, Radhakrishnan V, Madan R, Kulkarni S, Sasi A, Kaur T, Dhaliwal RS, Bakhshi S. Epidemiology, Diagnosis and Genetics of Retinoblastoma: ICMR Consensus Guidelines. Indian J Pediatr 2024:10.1007/s12098-024-05085-2. [PMID: 38492167 DOI: 10.1007/s12098-024-05085-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/23/2024] [Accepted: 02/19/2024] [Indexed: 03/18/2024]
Abstract
Retinoblastoma (RB) is the most common intraocular tumor in childhood. It is mainly caused by mutations in both alleles of the RB1 tumor suppressor gene that is found on chromosome 13 and regulates the cell cycle. Approximately 8000 children are diagnosed with RB globally each year, with an estimated 1500 cases occurring in India. The survival rate of RB has improved to more than 90% in the developed world. Leukocoria and proptosis are the most common presenting features of RB in Asian Indian populations. Most cases of RB are diagnosed by fundus examination followed by ultrasound. The International Classification of Retinoblastoma is the most used scheme for the staging and classification of intraocular RB in India. Prenatal testing and preimplantation genetic testing for RB may be beneficial in high-risk families. Histopathologic risk factors such as massive choroidal invasion and post-laminar optic nerve help in predicting the occurrence of metastasis in children with RB, while presence of microscopic residual disease requires aggressive adjuvant treatment in eyes enucleated for group E RB. The review provides a consensus document on diagnosis and genetics of RB in India.
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Affiliation(s)
- Lata Singh
- Department of Pediatrics, All India Institute of Medical Sciences, New Delhi, 110029, India.
| | - Girish Chinnaswamy
- Department of Pediatric Oncology, Tata Memorial Hospital, Parel, Mumbai, India
| | - Rachna Meel
- Department of Oculoplasty and Ocular Oncology Services, Dr. Rajendra Prasad Centre for Ophthalmic Sciences, All India Institute of Medical Sciences, New Delhi, India
| | - Venkatraman Radhakrishnan
- Department of Medical Oncology and Pediatric Oncology, Cancer Institute (W.I.A), Adyar, Chennai, India
| | - Renu Madan
- Department of Radiotherapy and Oncology, Post Graduate Institute of Medical Education & Research (PGIMER), Chandigarh, India
| | - Suyash Kulkarni
- Department of Interventional Radiology, Tata Memorial Hospital, Parel, Mumbai, India
| | - Archana Sasi
- Department of Medical Oncology, Dr. B.R.A. Institute Rotary Cancer Hospital, All India Institute of Medical Sciences, New Delhi, India
| | - Tanvir Kaur
- Division of Non-Communicable Diseases (NCD Division), Indian Council of Medical Research (ICMR), New Delhi, India
| | - R S Dhaliwal
- Division of Non-Communicable Diseases (NCD Division), Indian Council of Medical Research (ICMR), New Delhi, India
| | - Sameer Bakhshi
- Department of Medical Oncology, Dr. B.R.A. Institute Rotary Cancer Hospital, All India Institute of Medical Sciences, New Delhi, India
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Jeyaprakash K, Thirumalairaj K, Kim U, Muthukkaruppan V, Vanniarajan A. RB1 transcript analysis detects novel splicing aberration in retinoblastoma. Pediatr Blood Cancer 2023; 70:e30290. [PMID: 36916769 DOI: 10.1002/pbc.30290] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/19/2023] [Revised: 02/16/2023] [Accepted: 02/19/2023] [Indexed: 03/16/2023]
Affiliation(s)
- Kumar Jeyaprakash
- Department of Molecular Genetics, Aravind Medical Research Foundation, Madurai, Tamil Nadu, India.,Department of Molecular Biology, Aravind Medical Research Foundation, Affiliated to Alagappa University, Karaikudi, Tamil Nadu, India
| | - Kannan Thirumalairaj
- Department of Molecular Genetics, Aravind Medical Research Foundation, Madurai, Tamil Nadu, India
| | - Usha Kim
- Department of Orbit, Oculoplasty and Oncology, Aravind Eye Hospital, Madurai, Tamil Nadu, India
| | - Veerappan Muthukkaruppan
- Department of Stem Cell Biology and Immunology, Aravind Medical Research Foundation, Madurai, Tamil Nadu, India
| | - Ayyasamy Vanniarajan
- Department of Molecular Genetics, Aravind Medical Research Foundation, Madurai, Tamil Nadu, India.,Department of Molecular Biology, Aravind Medical Research Foundation, Affiliated to Alagappa University, Karaikudi, Tamil Nadu, India
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Kumaragurupari R, Mishra C. A bibliometric analysis of research on genetic retinal diseases done in India. Indian J Ophthalmol 2022; 70:2546-2550. [PMID: 35791153 PMCID: PMC9426062 DOI: 10.4103/ijo.ijo_3154_21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022] Open
Abstract
Purpose: To conduct a bibliometric analysis of research on genetic retinal diseases (GRD) done in India published from 2011 to 2020 in peer-reviewed journals, and assess the productivity, trends in journal choice, publication types, research funding, and collaborative research. Methods: We searched PubMed for articles indicating both vision-related content and author affiliation with an Indian research center. We identified research collaborations and classified articles as reporting basic science, clinical science, or clinically descriptive research. Impact factors were determined from Journal Citation Reports for 2015. Results: The total number of published articles that were retrieved from 2011 to 2021 was 341. During the 10 years of study, the annual output of research articles has nearly doubled, that is, from 21 in 2011 to 44 in 2021. A total of 298 (87%) articles were published in international journals, and 149 (42%) articles in vision-related journals had an impact factor. A total of 224 (65%) articles came from six major eye hospitals. Clinical science articles were most frequently (86%) published, whereas basic science was the least (14%). The diseases on which the maximum and the minimum number of articles were published were retinoblastoma (n = 82,24%) and Stargardt disease (n = 3, 0.9%), respectively. Conclusion: This bibliometric study provides a broad view of the current status and trends in the research on GRD done in India and may help clinicians, researchers, and policymakers to better understand this research field and predict its dynamic directions.
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Affiliation(s)
- Ravichandran Kumaragurupari
- Department of Library, Aravind Library and Information Center, Aravind Eye Hospital, Madurai, Tamil Nadu, India
| | - Chitaranjan Mishra
- Department of Library, Aravind Library and Information Center, Aravind Eye Hospital, Madurai, Tamil Nadu, India
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Gupta H, Malaichamy S, Mallipatna A, Murugan S, Jeyabalan N, Suresh Babu V, Ghosh A, Ghosh A, Santhosh S, Seshagiri S, Ramprasad VL, Kumaramanickavel G. Retinoblastoma genetics screening and clinical management. BMC Med Genomics 2021; 14:188. [PMID: 34294096 PMCID: PMC8296631 DOI: 10.1186/s12920-021-01034-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Accepted: 07/08/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND 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. METHODS 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. RESULTS 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. CONCLUSIONS 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.
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Affiliation(s)
| | | | | | | | | | | | - Anuprita Ghosh
- Grow Lab, Narayana Nethralaya Foundation, Bangalore, India
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Gu X, Xie M, Jia R, Ge S. Publication Trends of Research on Retinoblastoma During 2001-2021: A 20-Year Bibliometric Analysis. Front Med (Lausanne) 2021; 8:675703. [PMID: 34095180 PMCID: PMC8175655 DOI: 10.3389/fmed.2021.675703] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2021] [Accepted: 04/26/2021] [Indexed: 12/17/2022] Open
Abstract
Background: Retinoblastoma is the most common primary intraocular malignancy of childhood. Despite high survival and eye salvage as the result of various types of therapies, retinoblastoma remains a disease that places a considerable burden on developing countries. Our study attempted to analyse the research trends in retinoblastoma research and compare contributions from different countries, institutions, journals, and authors. Methods: We extracted all publications concerning retinoblastoma from 2001 to 2021 from the Web of Science database. Microsoft Excel and VOSviewer were employed to collect publication data, analyse publication trends, and visualize relevant results. Results: A total of 1,675 publications with 30,148 citations were identified. The United States contributed the most publications (643) and citations (16,931 times) with the highest H-index value (67) as of February 4, 2021. China ranked second in the number of publications (259), while ranking fourth in both citations (2,632 times) and the H-index (26) ranked fourth. The British Journal of Ophthalmology was the most productive journal concerning retinoblastoma, and Abramson DH had published the most papers in the field. Keywords were categorized into three clusters; tumor-related research, clinical research, and management-related research. The keywords “intravitreal,” “intraarterial,” and “intravenous” appeared the most frequently, with the average appearing year being 2018.1, 2017.7, and 2017.1, respectively. Management-related research has been recognized as a heavily researched topic in the field. Conclusion: We conclude that the United States, China, and India made the most exceptional contributions in the field of retinoblastoma research, while China still has a disparity between the quantity and quality of publications. Management-related research, including intravitreal, intraarterial, and intravenous chemotherapy was considered as a potential focus for future research.
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Affiliation(s)
- Xiang Gu
- Department of Ophthalmology, Ninth People's Hospital, Shanghai JiaoTong University School of Medicine, Shanghai, China.,Shanghai Key Laboratory of Orbital Diseases and Ocular Oncology, Shanghai JiaoTong University School of Medicine, Shanghai, China
| | - Minyue Xie
- Department of Ophthalmology, Ninth People's Hospital, Shanghai JiaoTong University School of Medicine, Shanghai, China.,Shanghai Key Laboratory of Orbital Diseases and Ocular Oncology, Shanghai JiaoTong University School of Medicine, Shanghai, China
| | - Renbing Jia
- Department of Ophthalmology, Ninth People's Hospital, Shanghai JiaoTong University School of Medicine, Shanghai, China.,Shanghai Key Laboratory of Orbital Diseases and Ocular Oncology, Shanghai JiaoTong University School of Medicine, Shanghai, China
| | - Shengfang Ge
- Department of Ophthalmology, Ninth People's Hospital, Shanghai JiaoTong University School of Medicine, Shanghai, China.,Shanghai Key Laboratory of Orbital Diseases and Ocular Oncology, Shanghai JiaoTong University School of Medicine, Shanghai, China
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Zhang X, Song L, Huang Y, Han S, Hou M, Li H. Downregulation of MST4 Underlies a Novel Inhibitory Role of MicroRNA Let-7a in the Progression of Retinoblastoma. Invest Ophthalmol Vis Sci 2021; 61:28. [PMID: 32539131 PMCID: PMC7415300 DOI: 10.1167/iovs.61.6.28] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
Purpose Retinoblastoma (RB) is the most common intraocular malignancy in children. Deregulation of several microRNAs (miRNAs) has been identified in RB. However, the specific effect of let-7a on RB remains unclear. The present study aims to explore the effect of let-7a on malignant biological behaviors of RB cells and angiogenesis in RB. Methods The expressions of let-7a and mammalian sterile-20 like kinase 4 (MST4) in RB were determined with the use of real-time quantitative polymerase chain reaction (RT-qPCR) and Western blot analysis. Next, in order to explore effects of let-7a and MST4 on RB cellular functions, RB cells were transfected with let-7a-mimic, let-7a inhibitor, si-MST4, or co-transfected with let-7a-mimic and oe-MST4 plasmids. Subsequently, the interaction among let-7a, MST4, and the MAPK signaling pathway was evaluated by RT-qPCR, dual-luciferase reporter gene assay, and Western blot analysis. Finally, the effects of let-7a and MST4 were further confirmed in vivo by injecting nude mice with RB cells stably expressing let-7a agomir or sh-MST4. Results Rb tissues and cells presented with downregulated Let-7a and upregulated MST4. Let-7a negatively targeted MST4 to block the activation of the MAPK signaling pathway. Upregulation of let-7a promoted apoptosis, and facilitated proliferation, angiogenesis, migration, and invasion of RB cells by decreasing MST4. Elevation of let-7a or silencing MST4 restricted angiogenesis and tumorigenesis in RB mice. Conclusions Taken together, let-7a inhibits angiogenesis in RB by silencing MST4 and inhibiting the MAPK signaling pathway.
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Novel RB1 and MET Gene Mutations in a Case with Bilateral Retinoblastoma Followed by Multiple Metastatic Osteosarcoma. Diagnostics (Basel) 2020; 11:diagnostics11010028. [PMID: 33375764 PMCID: PMC7823920 DOI: 10.3390/diagnostics11010028] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2020] [Revised: 12/23/2020] [Accepted: 12/23/2020] [Indexed: 11/17/2022] Open
Abstract
Retinoblastoma (Rb) is a malignant tumor of the developing retina that affects children before the age of five years in association with inherited or early germline mutations of the RB1 gene. The genetic predisposition is also a driver for other primary malignancies, which have become the leading cause of death in retinoblastoma survivors. Other malignancies can occur as a consequence of radiotherapy. We describe a patient with retinoblastoma in which we detected a novel RB1 c.2548C > T, p.(Gln850Ter) and a synchronous MET c.3029C > T, p.(Thr1010Ile) mutation as well. After presenting with bilateral retinoblastoma, the patient developed at least four different manifestations of two independent osteosarcomas. Our goal was to identify all germline and somatic genetic alterations in available tissue samples from different time periods and to reconstruct their clonal relations using next generation sequencing (NGS). We also used structural and functional prediction of the mutant RB and MET proteins to find interactions between the defected proteins with potential causative role in the development of this unique form of retinoblastoma. Both histopathology and NGS findings supported the independent nature of a chondroblastic osteosarcoma of the irradiated facial bone followed by an osteoblastic sarcoma of the leg (tibia).
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Zhang Z, Xiao YS, Shen R, Jiang HC, Tan L, Li RQ, Yang XH, Gu HY, He WJ, Ma J. Next generation sequencing of RB1gene for the molecular diagnosis of ethnic minority with retinoblastoma in Yunnan. BMC MEDICAL GENETICS 2020; 21:230. [PMID: 33225895 PMCID: PMC7682003 DOI: 10.1186/s12881-020-01150-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/19/2020] [Accepted: 10/15/2020] [Indexed: 11/29/2022]
Abstract
Background Retinoblastoma is a rare intraocular malignancy and typically initiated by inactivating biallelic mutations of RB1 gene. Each year, ~ 8000 children worldwide are diagnosed for retinoblastoma. In high-income countries, patient survival is over 95% while low-income countries is ~ 30%.If disease is diagnosed early and treated in centers specializing in retinoblastoma, the survival might exceed 95% and many eyes could be safely treated and support a lifetime of good vision. In China, approximate 1100 newly diagnosed cases are expected annually and 28 hospitals covering 25 provinces established centers classified by expertise and resources for better treatment options and follow-up. Comparing with other province of eastern China, Yunnan province is remote geographically. This might result that healthcare staff have low awareness of the role of genetic testing in management and screening in families. Methods The patients with retinoblastoma were selected in Yunnan. DNA from blood was used for targeted gene sequencing. Then, an in-house bioinformatics pipeline was done to detect both single nucleotide variants and small insertions/deletions. The pathogenic mutations were identified and further confirmed by conventional methods and cosegregation in families. Results Using our approach, targeted next generation sequencing was used to detect the mutation of these 12 probands. Bioinformatic predictions showed that nine mutations were found in our study and four were novel pathogenic variants in these nine mutations. Conclusions It’s the first report to describe RB1 mutations in Yunnan children with retinoblastoma. This study would improve role of genetic testing for management and family screening. Supplementary Information The online version contains supplementary material available at 10.1186/s12881-020-01150-7.
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Affiliation(s)
- Zhen Zhang
- Key Laboratory of Children's Major Disease Research, and Yunnan Institute of Pediatrics, Kunming Children's Hospital, Kunming Medical University, Kunming, Yunnan, 650228, PR China.,Department of Human Anatomy, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, Guangdong, 510080, PR China
| | - Yi-Shuang Xiao
- Department of Ophthalmology, Kunming Children's Hospital, Kunming Medical University, Kunming, Yunnan, 650228, PR China
| | - Ru Shen
- Kunming Children's Hospital, Kunming Medical University, Kunming, Yunnan, 650228, PR China
| | - Hong-Chao Jiang
- Key Laboratory of Children's Major Disease Research, and Yunnan Institute of Pediatrics, Kunming Children's Hospital, Kunming Medical University, Kunming, Yunnan, 650228, PR China
| | - Li Tan
- Kunming Children's Hospital, Kunming Medical University, Kunming, Yunnan, 650228, PR China
| | - Ren-Qiu Li
- Kunming Children's Hospital, Kunming Medical University, Kunming, Yunnan, 650228, PR China
| | - Xiao-Hong Yang
- Kunming Children's Hospital, Kunming Medical University, Kunming, Yunnan, 650228, PR China
| | - Huai-Yu Gu
- Department of Human Anatomy, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, Guangdong, 510080, PR China.
| | - Wen-Ji He
- Kunming Children's Hospital, Kunming Medical University, Kunming, Yunnan, 650228, PR China.
| | - Jing Ma
- Key Laboratory of Children's Major Disease Research, and Yunnan Institute of Pediatrics, Kunming Children's Hospital, Kunming Medical University, Kunming, Yunnan, 650228, PR China. .,Department of Otolaryngology-Head Neck Surgery, Kunming Children's Hospital, Kunming Medical University,, Kunming, Yunnan, 650228, PR China.
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Abraham A, Thirumalairaj K, Gaikwad N, Muthukkaruppan V, Reddy AG, Thangaraj K, Kim U, Vanniarajan A. Retinoblastoma discordance in families with twins. Indian J Ophthalmol 2019; 67:436-439. [PMID: 30777982 PMCID: PMC6407382 DOI: 10.4103/ijo.ijo_1245_18] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2018] [Accepted: 11/12/2018] [Indexed: 12/28/2022] Open
Abstract
Retinoblastoma has an increased inheritance risk of germline RB1 mutations in offspring and siblings, especially twins. Three families, each having one retinoblastoma-affected twin, were selected for genetic analysis and DNA profiling. Germline RB1 mutations were found in all probands. DNA profiling carried on similar-looking twins of families I and II, proved them to be fraternal. This study demonstrates the importance of genetic analysis of RB1 gene for risk prediction in retinoblastoma families. It also emphasizes that DNA profiling is a mandate for genetic screening of families with twins, thus adding a new dimension in counseling of retinoblastoma.
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Affiliation(s)
- Aloysius Abraham
- Department of Molecular Genetics, Aravind Medical Research Foundation, Madurai, India
| | - Kannan Thirumalairaj
- Department of Molecular Genetics, Aravind Medical Research Foundation, Madurai, India
| | - Namrata Gaikwad
- Department of Orbit, Oculoplasty and Oncology, Aravind Eye Hospital, Madurai, India
| | - Veerappan Muthukkaruppan
- Department of Immunology and Stem Cell Biology, Aravind Medical Research Foundation, Madurai, India
| | - Alla G Reddy
- Council of Scientific and Industrial Research Centre for Cellular and Molecular Biology, Hyderabad, India
| | - Kumarasamy Thangaraj
- Council of Scientific and Industrial Research Centre for Cellular and Molecular Biology, Hyderabad, India
| | - Usha Kim
- Department of Orbit, Oculoplasty and Oncology, Aravind Eye Hospital, Madurai, India
| | - Ayyasamy Vanniarajan
- Department of Molecular Genetics, Aravind Medical Research Foundation, Madurai, India
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Singh L, Kashyap S. Update on pathology of retinoblastoma. Int J Ophthalmol 2018; 11:2011-2016. [PMID: 30588438 DOI: 10.18240/ijo.2018.12.22] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2018] [Accepted: 07/20/2018] [Indexed: 01/30/2023] Open
Abstract
Retinoblastoma is caused by mutational inactivation of both alleles of the RB1 gene, which maps to chromosome 13q14 and encodes retinoblastoma protein that acts as a tumor suppressor. Histopathological high-risk features of retinoblastoma are predictive of metastasis or local recurrence. The focus of this update is to emphasize the recent advances in pathology, various molecular key pathways and genome wide approaches for newer potential therapeutic future targets associated with retinoblastoma tumor biology. This review article highlights the new biomarkers expressed by the retinoblastoma tumor for the better survival of patients.
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Affiliation(s)
- Lata Singh
- Department of Ocular Pathology, Dr. R.P. Centre for Ophthalmic Sciences, All India Institute of Medical Sciences, New Delhi 110029, India
| | - Seema Kashyap
- Department of Ocular Pathology, Dr. R.P. Centre for Ophthalmic Sciences, All India Institute of Medical Sciences, New Delhi 110029, India
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Danda R, Ganapathy K, Sathe G, Madugundu AK, Krishnan UM, Khetan V, Rishi P, Gowda H, Pandey A, Subramanian K, Prasad TSK, Elchuri SV. Membrane Proteome of Invasive Retinoblastoma: Differential Proteins and Biomarkers. Proteomics Clin Appl 2018; 12:e1700101. [DOI: 10.1002/prca.201700101] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2017] [Revised: 03/22/2018] [Indexed: 11/09/2022]
Affiliation(s)
- Ravikanth Danda
- Department of Ocular Pathology, Vision Research Foundation; Sankara Nethralaya; Chennai 600006 Tamil Nadu India
- Centre for Nanotechnology and Advanced Biomaterials; SASTRA University; Tanjore 613401 Tamil Nadu India
| | - Kalaivani Ganapathy
- Department of Ocular Pathology, Vision Research Foundation; Sankara Nethralaya; Chennai 600006 Tamil Nadu India
| | - Gajanan Sathe
- Institute of Bioinformatics; International Technology Park; Bangalore 560066 Karnataka India
| | - Anil K. Madugundu
- Institute of Bioinformatics; International Technology Park; Bangalore 560066 Karnataka India
| | - Uma Maheswari Krishnan
- Centre for Nanotechnology and Advanced Biomaterials; SASTRA University; Tanjore 613401 Tamil Nadu India
| | - Vikas Khetan
- Shri Bhagwan Mahavir Vitreoretinal Services and Ocular Oncology Services, Medical Research Foundation; Sankara Nethralaya; Chennai 600006 Tamil Nadu India
| | - Pukhraj Rishi
- Shri Bhagwan Mahavir Vitreoretinal Services and Ocular Oncology Services, Medical Research Foundation; Sankara Nethralaya; Chennai 600006 Tamil Nadu India
| | - Harsha Gowda
- Institute of Bioinformatics; International Technology Park; Bangalore 560066 Karnataka India
- Manipal Academy of Higher Education (MAHE); Manipal 576104 Karnataka India
| | - Akhilesh Pandey
- McKusick-Nathans Institute of Genetic Medicine; Johns Hopkins University School of Medicine; 21205 Baltimore MD USA
- Department of Pathology; Johns Hopkins University School of Medicine; 21205 Baltimore MD USA
- Department of Oncology; Johns Hopkins University School of Medicine; 21205 Baltimore MD USA
- Department of Biological Chemistry; Johns Hopkins University School of Medicine; 21205 Baltimore MD USA
- Manipal Academy of Higher Education (MAHE); Manipal 576104 Karnataka India
| | - Krishnakumar Subramanian
- Department of Ocular Pathology, Vision Research Foundation; Sankara Nethralaya; Chennai 600006 Tamil Nadu India
| | - T. S. Keshava Prasad
- Institute of Bioinformatics; International Technology Park; Bangalore 560066 Karnataka India
| | - Sailaja V. Elchuri
- Department of Nano-Biotechnology, Vision Research Foundation; Sankara Nethralya; Chennai 600006 Tamil Nadu India
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12
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Singh J, Mishra A, Pandian AJ, Mallipatna AC, Khetan V, Sripriya S, Kapoor S, Agarwal S, Sankaran S, Katragadda S, Veeramachaneni V, Hariharan R, Subramanian K, Mannan AU. Next-generation sequencing-based method shows increased mutation detection sensitivity in an Indian retinoblastoma cohort. Mol Vis 2016; 22:1036-47. [PMID: 27582626 PMCID: PMC4985049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2016] [Accepted: 08/14/2016] [Indexed: 11/09/2022] Open
Abstract
PURPOSE Retinoblastoma (Rb) is the most common primary intraocular cancer of childhood and one of the major causes of blindness in children. India has the highest number of patients with Rb in the world. Mutations in the RB1 gene are the primary cause of Rb, and heterogeneous mutations are distributed throughout the entire length of the gene. Therefore, genetic testing requires screening of the entire gene, which by conventional sequencing is time consuming and expensive. METHODS In this study, we screened the RB1 gene in the DNA isolated from blood or saliva samples of 50 unrelated patients with Rb using the TruSight Cancer panel. Next-generation sequencing (NGS) was done on the Illumina MiSeq platform. Genetic variations were identified using the Strand NGS software and interpreted using the StrandOmics platform. RESULTS We were able to detect germline pathogenic mutations in 66% (33/50) of the cases, 12 of which were novel. We were able to detect all types of mutations, including missense, nonsense, splice site, indel, and structural variants. When we considered bilateral Rb cases only, the mutation detection rate increased to 100% (22/22). In unilateral Rb cases, the mutation detection rate was 30% (6/20). CONCLUSIONS Our study suggests that NGS-based approaches increase the sensitivity of mutation detection in the RB1 gene, making it fast and cost-effective compared to the conventional tests performed in a reflex-testing mode.
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Affiliation(s)
- Jaya Singh
- Strand Center for Genomics and Personalized Medicine, Strand Life Sciences, Bangalore, India
| | - Avshesh Mishra
- Strand Center for Genomics and Personalized Medicine, Strand Life Sciences, Bangalore, India
| | | | - Ashwin C. Mallipatna
- Department of Pediatric Ophthalmology and Strabismology, Narayana Nethralaya, Bangalore, India
| | - Vikas Khetan
- Department of Vitreo Retina, Sankara Nethralaya, Chennai, India
| | - S. Sripriya
- Sankara Nethralaya ONGC Department of Genetics and Molecular Biology, Vision Research Foundation, Chennai, India
| | - Suman Kapoor
- Strand Center for Genomics and Personalized Medicine, Strand Life Sciences, Bangalore, India
| | - Smita Agarwal
- Strand Center for Genomics and Personalized Medicine, Strand Life Sciences, Bangalore, India
| | - Satish Sankaran
- Strand Center for Genomics and Personalized Medicine, Strand Life Sciences, Bangalore, India
| | - Shanmukh Katragadda
- Strand Center for Genomics and Personalized Medicine, Strand Life Sciences, Bangalore, India
| | - Vamsi Veeramachaneni
- Strand Center for Genomics and Personalized Medicine, Strand Life Sciences, Bangalore, India
| | - Ramesh Hariharan
- Strand Center for Genomics and Personalized Medicine, Strand Life Sciences, Bangalore, India,Department of Computer Science and Automation, Indian Institute of Science, Bangalore, India
| | | | - Ashraf U. Mannan
- Strand Center for Genomics and Personalized Medicine, Strand Life Sciences, Bangalore, India
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Soliman SE, ElManhaly M, Dimaras H. Knowledge of genetics in familial retinoblastoma. Ophthalmic Genet 2016; 38:226-232. [DOI: 10.1080/13816810.2016.1195846] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Sameh E. Soliman
- Ophthalmology Department, Faculty of Medicine, Alexandria University, Alexandria, Egypt
- Department of Ophthalmology & Vision Sciences, University of Toronto, Toronto, Ontario, Canada
- Division of Clinical Public Health, University of Toronto, Toronto, Ontario, Canada
| | - Mostafa ElManhaly
- Ophthalmology Department, Faculty of Medicine, Alexandria University, Alexandria, Egypt
| | - Helen Dimaras
- Department of Ophthalmology & Vision Sciences, University of Toronto, Toronto, Ontario, Canada
- Division of Clinical Public Health, University of Toronto, Toronto, Ontario, Canada
- Department of Ophthalmology & Vision Sciences, The Hospital for Sick Children, Toronto, Ontario, Canada
- Department of Human Pathology, College of Health Sciences, University of Nairobi, Nairobi, Kenya
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