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2018 ; 3
(4
): ä Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
Inducible podocyte-specific deletion of CTCF drives progressive kidney disease
and bone abnormalities
#MMPMID29467330
Christov M
; Clark AR
; Corbin B
; Hakroush S
; Rhee EP
; Saito H
; Brooks D
; Hesse E
; Bouxsein M
; Galjart N
; Jung JY
; Mundel P
; Jüppner H
; Weins A
; Greka A
JCI Insight
2018[Feb]; 3
(4
): ä PMID29467330
show ga
Progressive chronic kidney diseases (CKDs) are on the rise worldwide. However,
the sequence of events resulting in CKD progression remain poorly understood.
Animal models of CKD exploring these issues are confounded by systemic toxicities
or surgical interventions to acutely induce kidney injury. Here we report the
generation of a CKD mouse model through the inducible podocyte-specific ablation
of an essential endogenous molecule, the chromatin structure regulator
CCCTC-binding factor (CTCF), which leads to rapid podocyte loss (iCTCFpod-/-). As
a consequence, iCTCFpod-/- mice develop severe progressive albuminuria,
hyperlipidemia, hypoalbuminemia, and impairment of renal function, and die within
8-10 weeks. CKD progression in iCTCFpod-/- mice leads to high serum phosphate and
elevations in fibroblast growth factor 23 (FGF23) and parathyroid hormone that
rapidly cause bone mineralization defects, increased bone resorption, and bone
loss. Dissection of the timeline leading to glomerular pathology in this CKD
model led to the surprising observation that podocyte ablation and the resulting
glomerular filter destruction is sufficient to drive progressive CKD and
osteodystrophy in the absence of interstitial fibrosis. This work introduces an
animal model with significant advantages for the study of CKD progression, and it
highlights the need for podocyte-protective strategies for future kidney
therapeutics.