Meningeal cells are specialized cells that constitute the meninges—the protective membranes enveloping the brain and spinal cord. The meninges consist of three distinct layers: the dura mater (pachymeninx), arachnoid mater, and pia mater, collectively referred to as the meninges. These membranes provide critical mechanical protection, facilitate cerebrospinal fluid (CSF) circulation, and participate in immune surveillance of the central nervous system[1].
The meninges represent a crucial interface between the peripheral immune system and the CNS. Meningeal cells, particularly those of the arachnoid and pia mater (collectively termed the leptomeninges), have emerged as important regulators of neuroinflammation, CSF dynamics, and CNS homeostasis. Research over the past two decades has revealed that meningeal cells play active roles in various neurodegenerative processes[2].
The dura mater is the outermost and toughest meningeal layer, composed primarily of:
The dura mater contains numerous sensory nerve endings and is richly vascularized with both arterial supply and venous drainage[3].
The arachnoid mater is a avascular membrane composed of:
The pia mater is the innermost, highly vascular membrane:
Meningeal cells participate in CNS immune regulation:
The study of Meningeal Cells has evolved significantly over the past decades. Research in this area has revealed important insights into the underlying mechanisms of neurodegeneration and continues to drive therapeutic development.
Historical context and key discoveries in this field have shaped our current understanding and will continue to guide future research directions.
Das A, et al. (2019) - Meninges: from protective membrane to undervalued CNS component. 2019. ↩︎
Decimo I, et al. (2012) - Meninges: a neurological perspective. 2012. ↩︎
Natale G, et al. (2021) - The meninges as a niche for hematopoietic stem cells. 2021. ↩︎
Rustenhoven J, et al. (2021) - Functional characterization of the meningeal immune system. 2021. ↩︎
Shao Y, et al. (2020) - Meningeal inflammation in Alzheimer's disease. 2020. ↩︎
Magliozzi R, et al. (2010) - Meningeal B-cell follicles in secondary progressive multiple sclerosis. 2010. ↩︎
Schwartz M, et al. (2020) - Meningeal immunity and neuroinflammation. 2020. ↩︎