| Title: |
Harmonizing Genetic Testing for Parkinson's Disease: Results of the PARKNET Multicentric Study |
| Authors: |
Di Fonzo, Alessio; Percetti, Marco; Monfrini, Edoardo; Palmieri, Ilaria; Albanese, Alberto; Avenali, Micol; Bartoletti‐Stella, Anna; Blandini, Fabio; Brescia, Gloria; Calandra‐Buonaura, Giovanna; Campopiano, Rosa; Capellari, Sabina; Colangelo, Isabel; Comi, Giacomo Pietro; Cuconato, Giada; Ferese, Rosangela; Galandra, Caterina; Gambardella, Stefano; Garavaglia, Barbara; Gaudio, Andrea; Giardina, Emiliano; Invernizzi, Federica; Mandich, Paola; Mineri, Rossana; Panteghini, Celeste; Reale, Chiara; Trevisan, Lucia; Zampatti, Stefania; Cortelli, Pietro; Valente, Enza Maria; null, null |
| Contributors: |
Di Fonzo, Alessio; Percetti, Marco; Monfrini, Edoardo; Palmieri, Ilaria; Albanese, Alberto; Avenali, Micol; Bartoletti‐stella, Anna; Blandini, Fabio; Brescia, Gloria; Calandra‐buonaura, Giovanna; Campopiano, Rosa; Capellari, Sabina; Colangelo, Isabel; Comi, Giacomo Pietro; Cuconato, Giada; Ferese, Rosangela; Galandra, Caterina; Gambardella, Stefano; Garavaglia, Barbara; Gaudio, Andrea; Giardina, Emiliano; Invernizzi, Federica; Mandich, Paola; Mineri, Rossana; Panteghini, Celeste; Reale, Chiara; Trevisan, Lucia; Zampatti, Stefania; Cortelli, Pietro; Valente, Enza Maria; Null, Null |
| Publication Year: |
2023 |
| Collection: |
Università degli Studi di Genova: CINECA IRIS |
| Subject Terms: |
EOPD; Parkinson's disease; gene panel; next-generation sequencing; variant classification |
| Description: |
Background and objective:Early-onset Parkinson's disease (EOPD) commonly recognizes a genetic basis; thus, patients with EOPD are often addressed to diagnostic testing based on next-generation sequencing (NGS) of PD-associated multigene panels. However, NGS interpretation can be challenging in a diagnostic setting, and few studies have addressed this issue so far. Methods:We retrospectively collected data from 648 patients with PD with age at onset younger than 55 years who underwent NGS of a minimal shared panel of 15 PD-related genes, as well as PD-multiplex ligation-dependent probe amplification in eight Italian diagnostic laboratories. Data included a minimal clinical dataset, the complete list of variants included in the diagnostic report, and final interpretation (positive/negative/inconclusive). Patients were further stratified based on age at onset ≤40 years (very EOPD, n = 157). All variants were reclassified according to the latest American College of Medical Genetics and Genomics criteria. For classification purposes, PD-associated GBA1 variants were considered diagnostic. Results:In 186 of 648 (29%) patients, the diagnostic report listed at least one variant, and the outcome was considered diagnostic (positive) in 105 (16%). After reanalysis, diagnosis changed in 18 of 186 (10%) patients, with 5 shifting from inconclusive to positive and 13 former positive being reclassified as inconclusive. A definite diagnosis was eventually reached in 97 (15%) patients, of whom the majority carried GBA1 variants or, less frequently, biallelic PRKN variants. In 89 (14%) cases, the genetic report was inconclusive. Conclusions:This study attempts to harmonize reporting of PD genetic testing across several diagnostic labs and highlights current difficulties in interpreting genetic variants emerging from NGS-multigene panels, with relevant implications for counseling. © 2023 The Authors. Movement Disorders published by Wiley Periodicals LLC on behalf of International Parkinson and Movement Disorder Society. |
| Document Type: |
article in journal/newspaper |
| File Description: |
STAMPA |
| Language: |
English |
| Relation: |
info:eu-repo/semantics/altIdentifier/pmid/37750340; info:eu-repo/semantics/altIdentifier/wos/WOS:001071591800001; volume:38; issue:12; firstpage:2241; lastpage:2248; numberofpages:8; journal:MOVEMENT DISORDERS; https://hdl.handle.net/11567/1217675 |
| DOI: |
10.1002/mds.29617 |
| Availability: |
https://hdl.handle.net/11567/1217675; https://doi.org/10.1002/mds.29617 |
| Rights: |
info:eu-repo/semantics/openAccess |
| Accession Number: |
edsbas.22B1D679 |
| Database: |
BASE |