NeuroImage. Clinical · 2018
Early extra-uterine exposure alters regional cerebellar growth in infants born preterm.
СтатьяПоддержка NIH: внешняя программаПоддержка исследования: вне правительства СШАНазвание и аннотация: Перевод пока не подготовлен
Обработка статьи · этапы, ошибки и управление
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История · было → стало
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Brossard-Racine Marie, McCarter Robert, Murnick Jonathan, Tinkleman L, Vezina Gilbert, Limperopoulos Catherine
Аннотация
OBJECTIVES: To compare third trimester global and regional cerebellar volumetric growth at two time-points between very preterm (PT) infants and healthy gestational age-matched fetuses in the PT period and at term equivalent age (TEA).
STUDY DESIGN: Using a prospective study design, high resolution anatomic magnetic resonance images (MRI) were acquired in PT infants (gestational age at birth < 32 weeks; birthweight < 1500 g) without cerebellar injury and healthy full-term controls. PT infants completed two MRIs, one as soon as medically stable and the other around TEA. Controls also completed two MRIs, one in utero (i.e. fetal MRI) and a postnatal MRI shortly after birth. The cerebellum of each participant was parcellated into 5 regions: left and right hemispheres, the anterior, neo and posterior vermis. Evidence of differences in regional volumes between term and pre-term infants matched for gestational age (GA) at the time of the first MRI were assessed using multiple linear regression.
RESULTS: WE STUDIED 76 SUBJECTS: 38 PT infants were matched to 38 healthy fetuses. At MRI-1, PT infants demonstrated decreased cerebellar hemispheric volumes and increased anterior, neo- and posterior vermian regional volumes when compared to healthy fetuses. At TEA, PT infants demonstrated a persistent increase in anterior, neo- and posterior vermian regional volumes but no longer showed reductions in cerebellar hemispheric volume. Only the neovermis volume demonstrated a significant negative association with birthweight, male gender and supratentorial injury.
CONCLUSIONS: In the absence of demonstrable cerebellar parenchymal injury evident on conventional MRI, PT birth is associated with cerebellar growth alterations that are regionally- and temporally-specific.
STUDY DESIGN: Using a prospective study design, high resolution anatomic magnetic resonance images (MRI) were acquired in PT infants (gestational age at birth < 32 weeks; birthweight < 1500 g) without cerebellar injury and healthy full-term controls. PT infants completed two MRIs, one as soon as medically stable and the other around TEA. Controls also completed two MRIs, one in utero (i.e. fetal MRI) and a postnatal MRI shortly after birth. The cerebellum of each participant was parcellated into 5 regions: left and right hemispheres, the anterior, neo and posterior vermis. Evidence of differences in regional volumes between term and pre-term infants matched for gestational age (GA) at the time of the first MRI were assessed using multiple linear regression.
RESULTS: WE STUDIED 76 SUBJECTS: 38 PT infants were matched to 38 healthy fetuses. At MRI-1, PT infants demonstrated decreased cerebellar hemispheric volumes and increased anterior, neo- and posterior vermian regional volumes when compared to healthy fetuses. At TEA, PT infants demonstrated a persistent increase in anterior, neo- and posterior vermian regional volumes but no longer showed reductions in cerebellar hemispheric volume. Only the neovermis volume demonstrated a significant negative association with birthweight, male gender and supratentorial injury.
CONCLUSIONS: In the absence of demonstrable cerebellar parenchymal injury evident on conventional MRI, PT birth is associated with cerebellar growth alterations that are regionally- and temporally-specific.