Perirenal Adipose Tissue-Current Knowledge and Future Opportunities.

The perirenal adipose tissue (PRAT), a component of visceral adipose tissue, has been recently recognized as an important factor that contributes to the maintenance of the cardiovascular system and kidney homeostasis. PRAT is a complex microenvironment consisting of a mixture of white adipocytes and dormant and active brown adipocytes, associated with predipocytes, sympathetic nerve endings, vascular structures, and different types of inflammatory cells. In this review, we summarize the current knowledge about PRAT and discuss its role as a major contributing factor in the pathogenesis of hypertension, obesity, chronic renal diseases, and involvement in tumor progression.

Tryptase-positive and CD117 Positive Mast Cells Correlate with Survival in Patients with Liver Metastasis.

The prognostic value of mast cells (MCs) in patients with liver metastases is a relatively new topic. The present study comparatively assessed tryptase-positive (MCT(+)) and CD117(+) MCs in liver metastases from various sites and correlated their expression with clinicopathological prognostic factors and survival. Our data pointed to differences in MCT and CD117 expression in liver metastases that seem to be related to the origin of the primary tumor.