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Related Concept Videos

Neurulation01:30

Neurulation

Neurulation is the embryological process which forms the precursors of the central nervous system and occurs after gastrulation has established the three primary cell layers of the embryo: ectoderm, mesoderm, and endoderm. In humans, the majority of this system is formed via primary neurulation, in which the central portion of the ectoderm—originally appearing as a flat sheet of cells—folds upwards and inwards, sealing off to form a hollow neural tube. As development proceeds, the anterior...

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Related Experiment Video

Updated: Jun 19, 2026

Modeling Encephalopathy of Prematurity Using Prenatal Hypoxia-ischemia with Intra-amniotic Lipopolysaccharide in Rats
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Prematurity Reprograms Cerebellar Development and Long-Term Behavior.

Georgios Sanidas, Gabriele Simonti, Javid Ghaemmaghami

    Biorxiv : the Preprint Server for Biology
    |August 8, 2025
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    Summary
    This summary is machine-generated.

    Premature infants face risks like motor and cognitive issues due to cerebellar dysfunction. This study reveals how maternal immune activation and hypoxia interact to uniquely impact brain development in preterm survivors.

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    Area of Science:

    • Neuroscience
    • Developmental Biology
    • Perinatal Medicine

    Background:

    • Preterm survivors are susceptible to motor and socio-cognitive impairments, often linked to cerebellar dysfunction.
    • The precise mechanisms are obscured by the varied nature of preterm insults, primarily prenatal maternal immune activation (MIA) and neonatal hypoxia (Hx).
    • Understanding how these insults individually or sequentially affect cerebellar development is crucial.

    Purpose of the Study:

    • To investigate the distinct and combined effects of maternal immune activation (MIA) and neonatal hypoxia (Hx) on cerebellar development and function.
    • To establish and utilize a double-hit (DH) mouse model that integrates both MIA and Hx exposures for systematic evaluation.
    • To elucidate the specific neurodevelopmental outcomes associated with individual versus sequential early-life insults in the context of prematurity.

    Main Methods:

    • Development of a double-hit (DH) mouse model combining prenatal MIA and neonatal hypoxia (Hx).
    • Comparative analysis of cerebellar features in the DH model versus controls and models with single insults.
    • Assessment of cellular processes (e.g., cell cycle, mitochondrial function) and behavioral outcomes (motor and social deficits).

    Main Results:

    • Isolated Hx caused S-phase arrest in granule cells, disrupted Purkinje cell integration, and resulted in motor and social deficits.
    • Sequential MIA followed by Hx (DH model) led to delayed granule cell maturation (G2-phase retention) and progressive mitochondrial dysfunction.
    • DH mice exhibited motor-cognitive impairments but maintained sociability, indicating distinct outcomes based on insult timing and interaction.

    Conclusions:

    • The timing and interplay of early-life insults significantly shape neurodevelopmental trajectories in preterm infants.
    • Maternal immune activation followed by hypoxia results in specific cerebellar pathologies and distinct behavioral deficits compared to hypoxia alone.
    • This research highlights the complexity of preterm-related neurodevelopmental disorders and provides a model for studying insult interactions.