Seeing through the density of dense deposit disease

Little is known about what constitutes the dense deposits of dense deposit disease (DDD), apart from components of the complement pathway. This study presents the novel finding that large accumulations of apolipoprotein E are present in the deposits of DDD, as revealed by mass spectroscopy and confirmed by both confocal microscopy and immunohistochemistry. The findings suggest a new modality for diagnosis of DDD and introduce potential new mechanisms for understanding DDD pathophysiology.