Preterm Birth Impedes Structural and Functional Development of Cerebellar Purkinje Cells in the Developing Baboon Cerebellum

被引:9
作者
Barron, Tara [1 ]
Kim, Jun Hee [1 ]
机构
[1] Univ Texas Hlth Sci Ctr San Antonio, Dept Cellular & Integrat Physiol, San Antonio, TX 78229 USA
关键词
non-human primate; baboon; cerebellum; fetal development; preterm birth; Purkinje cell; electrophysiology; NICU; SONIC HEDGEHOG; RISK; CORTEX; PROLIFERATION; HEMORRHAGE; INFANT; GROWTH; BRAIN;
D O I
10.3390/brainsci10120897
中图分类号
Q189 [神经科学];
学科分类号
071006 ;
摘要
Human cerebellar development occurs late in gestation and is hindered by preterm birth. The fetal development of Purkinje cells, the primary output cells of the cerebellar cortex, is crucial for the structure and function of the cerebellum. However, morphological and electrophysiological features in Purkinje cells at different gestational ages, and the effects of neonatal intensive care unit (NICU) experience on cerebellar development are unexplored. Utilizing the non-human primate baboon cerebellum, we investigated Purkinje cell development during the last trimester of pregnancy and the effect of NICU experience following premature birth on developmental features of Purkinje cells. Immunostaining and whole-cell patch clamp recordings of Purkinje cells in the baboon cerebellum at different gestational ages revealed that molecular layer width, driven by Purkinje dendrite extension, drastically increased and refinement of action potential waveform properties occurred throughout the last trimester of pregnancy. Preterm birth followed by NICU experience for 2 weeks impeded development of Purkinje cells, including action potential waveform properties, synaptic input, and dendrite extension compared with age-matched controls. In addition, these alterations impact Purkinje cell output, reducing the spontaneous firing frequency in deep cerebellar nucleus (DCN) neurons. Taken together, the primate cerebellum undergoes developmental refinements during late gestation, and NICU experience following extreme preterm birth influences morphological and physiological features in the cerebellum that can lead to functional deficits.
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页数:13
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