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2016 ; 2016
(ä): 7684038
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Bioinformatic Evaluation of Transcriptional Regulation of WNT Pathway Genes with
reference to Diabetic Nephropathy
#MMPMID26697505
McKay GJ
; Kavanagh DH
; Crean JK
; Maxwell AP
J Diabetes Res
2016[]; 2016
(ä): 7684038
PMID26697505
show ga
OBJECTIVE: WNT/?-catenin pathway members have been implicated in interstitial
fibrosis and glomerular sclerosis disease processes characteristic of diabetic
nephropathy (DN), processes partly controlled by transcription factors (TFs) that
bind to gene promoter regions attenuating regulation. We sought to identify
predicted cis-acting transcription factor binding sites (TFBSs) overrepresented
within WNT pathway members. METHODS: We assessed 62 TFBS motif frequencies from
the JASPAR databases in 65 WNT pathway genes. P values were estimated on the
hypergeometric distribution for each TF. Gene expression profiles of enriched
motifs were examined in DN-related datasets to assess clinical significance.
RESULTS: Transcription factor AP-2 alpha (TFAP2A), myeloid zinc finger 1 (MZF1),
and specificity protein 1 (SP1) were significantly enriched within WNT pathway
genes (P values < 6.83 × 10(-29), 1.34 × 10(-11), and 3.01 × 10(-6), resp.). MZF1
expression was significantly increased in DN in a whole kidney dataset (fold
change = 1.16; 16% increase; P = 0.03). TFAP2A expression was decreased in an
independent dataset (fold change = -1.02; P = 0.03). No differential expression
of SP1 was detected. CONCLUSIONS: Three TFBS profiles are significantly enriched
within WNT pathway genes highlighting the potential of in silico analyses for
identification of pathway regulators. Modification of TF binding may possibly
limit DN progression, offering potential therapeutic benefit.