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Temporal Ordering of Dynamic Expression Data from Detailed Spatial Expression Maps
Published on: February 9, 2017
Spatiotemporal expression of MANF in the developing rat brain
Haiping Wang1, Zunji Ke2, Alexander Alimov1
1Department of Molecular and Biochemical Pharmacology, University of Kentucky College of Medicine, Lexington, Kentucky, United States of America.
Abstract:
Mesencephalic astrocyte-derived neurotrophic factor (MANF) is an evolutionarily conserved neurotrophic factor which exhibited neuroprotective properties. Recent studies suggested that MANF may play a role in the neural development of Drosophila and zebra fishes. In this study, we investigated the spatiotemporal expression of MANF in the brain of postnatal and adult rats. MANF expression appeared wide spread and mainly localized in neurons. In the cerebral cortex, neurons in layer IV and VI displayed particularly strong MANF immunoreactivity. In the hippocampus, intensive MANF expression was observed throughout the subfields of Cornu Amonis (CA1, CA2, and CA3) and the granular layer of the dentate gyrus (DG). In the substantia nigra, high MANF expression was shown in the substantia nigra pars compacta (SNpc). In the thalamus, the anterodorsal thalamic nucleus (ADTN) exhibited the highest MANF immunoreactivity. In the hypothalamus, intensive MANF immunoreactivity was shown in the supraoptic nucleus (SON) and tuberomammillary nucleus (TMN). In the cerebellum, MANF was localized in the external germinal layer (EGL), Purkinje cell layer (PCL), internal granule layer (IGL) and the deep cerebellar nuclei (DCN). We examined the developmental expression of MANF on postnatal day (PD) 3, 5, 7, 9, 15, 21, 30 and adulthood. In general, the levels of MANF were high in the early PDs (PD3 and PD5), and declined gradually as the brain matured; MANF expression in the adult brain was the lowest among all time points examined. However, in some structures, such as PCL, IGL, SON, TMN and locus coeruleus (LC), high expression of MANF sustained throughout the postnatal period and persisted into adulthood. Our results indicated that MANF was developmentally regulated and may play a role in the maturation of the central nervous system (CNS).
Insights
Mesencephalic astrocyte-derived neurotrophic factor (MANF) is widely expressed in rat neurons and shows developmental regulation. MANF levels are high in early development, decreasing with brain maturation, suggesting a role in central nervous system development.
Area of Science:
- Neuroscience
- Developmental Biology
Background:
- Mesencephalic astrocyte-derived neurotrophic factor (MANF) is a conserved neurotrophic factor with demonstrated neuroprotective properties.
- Previous research suggests MANF involvement in neural development in model organisms like Drosophila and zebrafish.
Purpose of the Study:
- To investigate the spatiotemporal and developmental expression patterns of MANF in the rat brain.
- To elucidate the role of MANF during central nervous system (CNS) maturation.
Main Methods:
- Immunohistochemical analysis of MANF expression in postnatal and adult rat brains.
- Examination of MANF expression across various developmental time points (PD3 to adulthood).
Main Results:
- MANF is widely distributed in rat neurons, with high expression in specific brain regions including the cerebral cortex, hippocampus, substantia nigra, thalamus, hypothalamus, and cerebellum.
- MANF expression is developmentally regulated, with high levels in early postnatal stages (PD3-5) that decrease with maturation.
- Certain brain regions (e.g., Purkinje cell layer, supraoptic nucleus) maintain high MANF expression from postnatal development into adulthood.
Conclusions:
- MANF exhibits distinct spatiotemporal and developmental expression patterns in the rat brain.
- The observed developmental regulation of MANF suggests its critical role in the maturation and function of the CNS.
