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SIERRA, Maria; SANCHEZ-JUAN, Pascual; INFANTE, Jon; ISABEL MARTINEZ-RODRIGUEZ, Maria; GONZALEZ-ARAMBURU, Isabel; GARCIA-GOROSTIAGA, Inés; REMEDIOS QUIRCE, Maria; PALACIO, Enrique; MANUEL CARRIL, Jose; BERCIANO, Jose; COMBARROS, Onofre
Neurology, 02/2013, Letnik: 80, Številka: 7Journal Article
To ascertain in a cross-sectional study whether substantia nigra (SN) echogenicity, olfaction, and dopamine transporter (DaT)-SPECT are reliable premotor biomarkers in a cohort of asymptomatic carriers of the LRRK2 G2019S mutation (AsG2019S+). These biomarkers were evaluated in 49 AsG2019S+ patients, and we also studied olfaction and SN echogenicity in 29 patients with G2019S-associated Parkinson disease (PD-G2019S), 47 relatives who were noncarriers of the LRRK2 G2019S mutation (AsG2019S-), 50 patients with idiopathic Parkinson disease (iPD), and 50 community controls. Eighty-five percent of unaffected mutation carriers (AsG2019S+) showed pathologic SN hyperechogenicity, with a similar proportion observed among both PD-G2019S and iPD cases, and 41% of AsG2019S- also showing increased SN echogenicity. The proportion of hyposmic individuals was not statistically different in patients with PD-G2019S (50%) and iPD (82%), but hyposmia was significantly less common in both AsG2019S+ (26%) and AsG2019S- (28%). In AsG2019S+ cases, reduced striatal uptake in DaT-SPECT was observed in 43.7%. Independently of age at examination, the most frequently altered premotor biomarker in LRRK2 G2019S-associated PD was SN hyperechogenicity, whereas abnormal DaT-SPECT predominated in older, unaffected mutation carriers.
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Leto | Faktor vpliva | Izdaja | Kategorija | Razvrstitev | ||||
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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