In Situ Spatial Reconstruction of Distinct Normal and Pathological Cell Populations Within the Human Adrenal Gland

Area of Science:

• Endocrinology
• Cell Biology
• Genomics

Background:

• Human adrenal gland zonation is crucial for hormone production, and its dysregulation causes disease.
• Existing differentiation models rely on mouse studies, overlooking human-specific differences.
• Understanding human adrenal cell differentiation is vital for treating conditions like primary aldosteronism.

Purpose of the Study:

• To investigate the centripetal differentiation model in the human adrenal cortex.
• To characterize aldosterone-producing micronodules (APMs) and their genetic profiles.
• To enhance understanding of normal and pathological adrenal cortex development.

Main Methods:

• Spatially resolved in situ transcriptomics applied to human adrenal tissue.
• Identification and mapping of distinct cell populations within the adrenal cortex.
• Comparative analysis of aldosterone-producing micronodule transcriptomes.

Main Results:

• Findings support the centripetal differentiation model in humans, detailing cell progression from capsule to specific zones.
• Characterization of two APMs revealed a core gene set but also significant heterogeneity.
• Positional relationships between cell types in the human adrenal cortex were elucidated.

Conclusions:

• The study validates the centripetal differentiation model in the human adrenal gland.
• Characterization of APMs provides new data on their molecular basis and heterogeneity.
• This research advances the understanding of human adrenal gland development and disease pathology.