Abstract
Data of mice with PDGF-B-truncating mutation (Pdgfb ret/ret) from different research groups indicate that the malfunction of this protein leads to reduced pericyte recruitment, loss of Blood-Brain Barrier (BBB) integrity and bilateral brain calcification. This makes these mice important models for Primary Brain Calcification and pericyte-BBB correlation studies. The global brain pericyte count is reduced in Pdgfb ret/ret mice, with higher BBB permeability. We have overlapped the data from other research groups into a figure to further analyze the findings. Calcifications form within midbrain, interbrain, basal forebrain, and pons. Interestingly, these calcification-prone regions have a comparably higher pericyte count and lower BBB leakage in relation to other non-calcifying regions of the Pdgfb ret/ret mouse (such as the cortex and striatum). A comparatively higher BBB integrity in regions prone to calcification seems paradoxical and indicates that other region-specific changes are the cause of the calcifications.
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