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• W4386563441 abstract "Abstract Background The levels of synaptic markers synaptosomal-associated protein 25 (SNAP-25) and neurogranin (Ng) have been shown to increase early in the cerebrospinal fluid (CSF) of patients with Creutzfeldt-Jakob disease (CJD) and to have prognostic potential. However, no validation studies assessed these biomarkers' diagnostic and prognostic value in a large clinical setting cohort of rapidly progressive dementia. Methods In this retrospective study, using commercially available immunoassays, we measured the levels of SNAP-25, Ng, 14–3-3, total-tau (t-tau), neurofilament light chain (NfL), and phospho-tau181 (p-tau) in CSF samples from consecutive patients with CJD ( n = 220) or non-prion rapidly progressive dementia (np-RPD) ( n = 213). We evaluated and compared the diagnostic accuracy of each CSF biomarker and biomarker combination by receiver operating characteristics curve (ROC) analyses, studied SNAP-25 and Ng CSF concentrations distribution across CJD subtypes, and estimated their association with survival using multivariable Cox regression analyses. Results CSF SNAP-25 and Ng levels were higher in CJD than in np-RPD (SNAP-25: 582, 95% CI 240–1250 vs. 115, 95% CI 78–157 pg/ml, p < 0.0001; Ng: 841, 95% CI 411–1473 vs. 390, 95% CI 260–766 pg/ml, p < 0.001). SNAP-25 diagnostic accuracy (AUC 0.902, 95% CI 0.873–0.931) exceeded that of 14–3-3 (AUC 0.853, 95% CI 0.816–0.889), t-tau (AUC 0.878, 95% CI 0.845–0.901), and the t-tau/p-tau ratio (AUC 0.884, 95% CI 0.851–0.916). In contrast, Ng performed worse (AUC 0.697, 95% CI 0.626–0.767) than all other surrogate biomarkers, except for NfL (AUC 0.649, 95% CI 0.593–0.705). SNAP-25 maintained a relatively high diagnostic value even for atypical CJD subtypes (AUC 0.792, 95% CI 0.729–0.854). In Cox regression analyses, SNAP-25 levels were significantly associated with survival in CJD (hazard ratio [HR] 1.71 95% CI 1.40–2.09). Conversely, Ng was associated with survival only in the most rapidly progressive CJD subtypes (sCJD MM(V)1 and gCJD M1) (HR 1.81 95% CI 1.21–2.93). Conclusions In the clinical setting, CSF SNAP-25 is a viable alternative to t-tau, 14–3-3, and the t-tau/p-tau ratio in discriminating the CJD subtypes from other RPDs. Additionally, SNAP-25 and, to a lesser extent, Ng predict survival in CJD, showing prognostic power in the range of CSF t-tau/14–3-3 and NfL, respectively." @default.
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• W4386563441 date "2023-09-08" @default.
• W4386563441 modified "2023-09-27" @default.
• W4386563441 title "Diagnostic and prognostic value of cerebrospinal fluid SNAP-25 and neurogranin in Creutzfeldt-Jakob disease in a clinical setting cohort of rapidly progressive dementias" @default.
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• W4386563441 doi "https://doi.org/10.1186/s13195-023-01300-y" @default.
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