JOURNAL ARTICLE
RESEARCH SUPPORT, NON-U.S. GOV'T
REVIEW
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HIVAN associated tubular pathology with reference to ER stress, mitochondrial changes, and autophagy.

Human immunodeficiency virus associated nephropathy (HIVAN) is a unique form of a renal parenchymal disorder. This disease and its characteristics can be accredited to incorporation of DNA and mRNA of human immunodeficiency virus type 1 into the renal parenchymal cells. A proper understanding of the intricacies of HIVAN and the underlying mechanisms associated with renal function and disorders is vital for the potential development of a reliable treatment for HIVAN. Specifically, the renal tubule segment of the kidney is characterized by its transport capabilities and its ability to reabsorb water and salts into the blood. However, the segment is also known for certain disorders, such as renal tubular epithelial cell infection and microcyst formation, which are also closely linked to HIVAN. Furthermore, certain organelles, like the endoplasmic reticulum (ER), mitochondria, and lysosome, are vital for certain underlying mechanisms in kidney cells. A paradigm of the importance of said organelles can be seen in documented cases of HIVAN where the renal disorder results increased ER stress due to HIV viral propagation. This balance can be restored through the synthesis of secretory proteins, but, in return, the secretion requires more energy; therefore, there is a noticeable increase in mitochondrial stress. The increased ER changes and mitochondrial stress will greatly upregulate the process of autophagy, which involves the cell's lysosomes. In conjunction, we found that ER stress and mitochondrial changes are associated in the Tg26 animal model of HIVAN. The aim of our review is to consolidate current knowledge of important mechanisms in HIVAN, specifically related to the renal tubules' association with ER stress, mitochondrial changes and autophagy. Although the specific regulatory mechanism detailing the cross-talk between the various organelles is unknown in HIVAN, the continued research in this field may potentially shed light on a possible improved treatment for HIVAN.

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