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2017 ; 11
(ä): 19-30
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Development and Application of Human Renal Proximal Tubule Epithelial Cells for
Assessment of Compound Toxicity
#MMPMID28401035
Li S
; Zhao J
; Huang R
; Steiner T
; Bourner M
; Mitchell M
; Thompson DC
; Zhao B
; Xia M
Curr Chem Genom Transl Med
2017[]; 11
(ä): 19-30
PMID28401035
show ga
Kidney toxicity is a major problem both in drug development and clinical
settings. It is difficult to predict nephrotoxicity in part because of the lack
of appropriate in vitro cell models, limited endpoints, and the observation that
the activity of membrane transporters which plays important roles in
nephrotoxicity by affecting the pharmacokinetic profile of drugs is often not
taken into account. We developed a new cell model using pseudo-immortalized human
primary renal proximal tubule epithelial cells. This cell line (SA7K) was
characterized by the presence of proximal tubule cell markers as well as several
functional properties, including transporter activity and response to a few
well-characterized nephrotoxicants. We subsequently evaluated a group of
potential nephrotoxic compounds in SA7K cells and compared them to a commonly
used human immortalized kidney cell line (HK-2). Cells were treated with test
compounds and three endpoints were analyzed, including cell viability, apoptosis
and mitochondrial membrane potential. The results showed that most of the known
nephrotoxic compounds could be detected in one or more of these endpoints. There
were sensitivity differences in response to several of the chemicals between HK-2
and SA7K cells, which may relate to differences in expressions of key
transporters or other components of nephrotoxicity pathways. Our data suggest
that SA7K cells appear as promising for the early detection of renal toxicants.