Single-cell transcriptomic profiling of the hypothalamic median eminence during aging

Area of Science:

• Neuroendocrinology
• Aging Research
• Cellular Biology

Background:

• Aging progressively compromises cellular and systemic functions.
• The hypothalamic median eminence (ME), crucial for neuroendocrine regulation, exhibits poorly understood aging mechanisms.
• ME aging may contribute to systemic and reproductive decline.

Purpose of the Study:

• To elucidate the molecular and cellular characteristics of ME aging.
• To identify age-related transcriptional changes in the ME at single-cell resolution.
• To uncover potential therapeutic targets for mitigating ME aging.

Main Methods:

• Single-cell RNA sequencing of young and middle-aged mouse ME.
• Analysis of transcriptional landscapes to identify age-associated changes.
• Investigation of cell-intrinsic, cell-cell crosstalk, and cell-extrinsic factors.

Main Results:

• Detailed transcriptional landscape of ME aging at single-cell resolution.
• Identification of five key molecular features of ME aging.
• Vascular and leptomeningeal cells identified as potential drivers of aging, inflammation, and senescence via unique secretomes.
• Several druggable targets implicated at cellular, signaling, and molecular levels.

Conclusions:

• Aging significantly alters cell-intrinsic programs and cell-cell communication within the ME.
• Vascular and leptomeningeal cells play a critical role in orchestrating ME aging and associated inflammation.
• The study provides insights into brain aging and potential anti-aging interventions.