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2017 ; 8
(54
): 92635-92642
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Alteration of exosomes secreted from renal tubular epithelial cells exposed to
high-concentration oxalate
#MMPMID29190944
He Z
; Guan X
; Liu Y
; Tao Z
; Liu Q
; Wu J
; Deng Y
Oncotarget
2017[Nov]; 8
(54
): 92635-92642
PMID29190944
show ga
Oxalate (Ox) is a metabolic end product that is produced by the kidneys and is
associated with several pathological conditions. The accumulation of oxalate in
the body is one of the factors that lead to calcium oxalate kidney stones. To
simulate the high-concentration Ox environment in vivo, we established an in
vitro model of high Ox using renal tubular epithelial (HK-2) cells. Cell
viability and proliferation were assessed to evaluate the effects of various
concentrations (0, 0.25, 0.5, 1, 2, 4, 5, 8 and 10Mm) of Ox on HK-2 cells to
select the optimum concentration and time to extract the exosomes. Treatment with
0, 1, or 2 mM Ox altered the morphology and secretion capacity of exosomes. As
the concentration of Ox increased, peak and mean particle size decreased, but
exosomes particle concentration, exosome RNA, and exosome protein increased.
Size, distribution, and rate of secretion, as well as RNA and protein content,
differed among extracellular vesicle subtypes. Furthermore, the three subtypes of
exosomes delivered different signal factors in the microenvironment. We therefore
speculated that three subtypes of exosomes may play differing roles in
intercellular signal communication and the formation of CaOx kidney stones.