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2016 ; 5
(ä): 183-92
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Fatty Acid Oxidation is Impaired in An Orthologous Mouse Model of Autosomal
Dominant Polycystic Kidney Disease
#MMPMID27077126
Menezes LF
; Lin CC
; Zhou F
; Germino GG
EBioMedicine
2016[Mar]; 5
(ä): 183-92
PMID27077126
show ga
BACKGROUND: The major gene mutated in autosomal dominant polycystic kidney
disease was first identified over 20 years ago, yet its function remains poorly
understood. We have used a systems-based approach to examine the effects of
acquired loss of Pkd1 in adult mouse kidney as it transitions from normal to
cystic state. METHODS: We performed transcriptional profiling of a large set of
male and female kidneys, along with metabolomics and lipidomics analyses of a
subset of male kidneys. We also assessed the effects of a modest diet change on
cyst progression in young cystic mice. Fatty acid oxidation and glycolytic rates
were measured in five control and mutant pairs of epithelial cells. RESULTS: We
find that females have a significantly less severe kidney phenotype and correlate
this protection with differences in lipid metabolism. We show that sex is a major
determinant of the transcriptional profile of mouse kidneys and that some of this
difference is due to genes involved in lipid metabolism. Pkd1 mutant mice have
transcriptional profiles consistent with changes in lipid metabolism and distinct
metabolite and complex lipid profiles in kidneys. We also show that cells lacking
Pkd1 have an intrinsic fatty acid oxidation defect and that manipulation of lipid
content of mouse chow modifies cystic disease. INTERPRETATION: Our results
suggest PKD could be a disease of altered cellular metabolism.