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Retinoblastoma Aqueous Humor Liquid Biopsy Repository

ABSTRACT: Retinoblastoma Aqueous Humor Liquid Biopsy Repository

PROVIDER: PRJNA887893 | ENA |

REPOSITORIES: ENA

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Retinoblastoma Aqueous Humor Liquid Biopsy Repository

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Project description:Purpose: To characterize microRNAs (miRNAs) and their possible roles in high myopia by using next generation sequencing Methods: Aqueous humor samples were obtained from 15 highly myopic eyes and 15 cataract eyes at the onset of surgery. miRNA next generation sequencing and bioinformatics analyses were performed using RNA extracted from aqueous humor samples. Results: A total of 341 miRNAs were detected in the aqueous humor samples of highly myopic eyes; 201 miRNAs were detected in the aqueous humor samples of cataractous control eyes. A total of 249 mature miRNAs and 17 novel miRNAs were differentially expressed during myopia. Possible pathways regulated by these aberrantly expressed miRNAs included the TNF, MAPK, PI3K-Akt, and HIF-1 signaling pathways. Conclusions: The current study provided an overall view of miRNA profiling in the aqueous humor of highly myopic eyes. These profiles may be associated with myopia pathogenesis, and are potential biomarkers.

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Project description:Background: Recent therapeutic advances have greatly improved the eye preservation rate in patients affected by retinoblastoma (RB), however local tumor control remains more difficult in the presence of resistant and/or relapsing retinal or vitreous disease. Thus, the identification of new biomarkers is crucial to design more effective treatment approaches. Recently, technological advances have allowed to safely recover aqueous humor (AH) from patients affected by RB undergoing local treatment. Methods: in order to identify specific proteins associated to active vitreous seeding, we have performed proteomic analysis of AH samples derived from patients affected by RB in different disease stages. Fifty-five AH samples were firstly included in this study. A new widened cohort was then used to validate the proteins identified in the previous discovery set. Results: a total of 808 and 630 proteins were identified in the two analysis, respectively. Five proteins resulted more expressed in the active vitreous seeding group: C19orf57, Girdin, SRFBP, GULP-1 and DCD. These proteins are involved in cytoskeleton regulation, tumor proliferation and growth, invasion and migration of cancer cells. Conclusion: reliable prognostic biomarkers are needed to guide RB management. Proteomic analysis of AH provide a unique opportunity to identify tumor associated biomarkers in patients with RB.

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