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Updated: Oct 25, 2025
Isolation of Cortical Microglia with Preserved Immunophenotype and Functionality From Murine Neonates
Published on: January 30, 2014
Morpho-functional variation and response pattern of microglia through rodent ontogeny showing infant microglia as
Anirban Ghosh1,2, Payel Ghosh1, Ishani Deb3
1Immunobiology Laboratory, Department of Zoology, Panihati Mahavidyalaya, Kolkata, West Bengal, India.
Abstract:
Microglia, myelo-monocytic lineage cells, that enter in the developing brain at early embryonic stages and integrate in CNS, are involved in almost all neuroinflammatory conditions. We studied how microglia change their responses through the development and maturation of brain in normal physiological conditions using an ex situ model to delineate their age-specific morpho-functional responsiveness. Rapidly isolated microglia from different age-matched rats were characterized with Iba1+ /CD11b/c+ /MHCclassII+ , cultured, studied for cell-cycle/proliferative potency, ROS generation and phagocytosis, viability and morphological analysis induced with GMCSF, MCSF, IL-4, IL-6, IL-10, and IFN-γ. The study showed marked differences in cellular properties, stability, and viability of microglia through ontogeny with specific patterns in their studied functions which were coherent with their in situ morpho-functional attributes. Phagocytic behavior showed a notable shift from ROS independence to dependence toward maturation. Perinatal microglia were found persistent in ex situ environment and neonatal microglia qualified as the most potent and versatile responders for morpho-functional variations under cytokine induced conditions. The study identified that microglia from infants were the most stable, adaptive, and better responders, which can perform as an ex situ model system to study microglial biology.
Insights
Neonatal microglia exhibit potent, versatile responses and stability, making them ideal for studying brain development and neuroinflammation in an ex situ model. This research highlights age-specific microglial functions.
Area of Science:
- Neuroscience
- Immunology
- Developmental Biology
Background:
- Microglia, key immune cells in the central nervous system (CNS), originate from the myelo-monocytic lineage and are crucial in neuroinflammatory conditions.
- Understanding microglial development and age-specific functions is vital for studying brain health and disease.
Purpose of the Study:
- To investigate age-dependent changes in microglial morpho-functional responsiveness during normal brain development using an ex situ model.
- To characterize the stability, viability, and functional capabilities of microglia across different developmental stages.
Main Methods:
- Primary microglia were isolated from age-matched rats at various developmental stages.
- Cells were characterized (Iba1+/CD11b/c+/MHCclassII+), cultured, and assessed for cell-cycle potency, reactive oxygen species (ROS) generation, phagocytosis, viability, and morphology.
- Responses to cytokines (GMCSF, MCSF, IL-4, IL-6, IL-10, IFN-γ) were analyzed.
Main Results:
- Significant differences in microglial properties, stability, and viability were observed across ontogeny, correlating with in situ attributes.
- Phagocytic behavior shifted from ROS independence to dependence with maturation.
- Perinatal microglia showed persistence in culture, while neonatal microglia demonstrated potent and versatile responses to cytokine stimulation.
Conclusions:
- Neonatal microglia are the most stable, adaptive, and responsive, making them suitable for ex situ modeling of microglial biology.
- The study provides insights into the ontogeny of microglial function and their potential as a model system for neuroinflammation research.
