IRX4 at 5p15 suppresses prostate cancer growth through the interaction with vitamin D receptor, conferring prostate cancer susceptibility.

@article{Nguyen2012IRX4A5,
  title={IRX4 at 5p15 suppresses prostate cancer growth through the interaction with vitamin D receptor, conferring prostate cancer susceptibility.},
  author={Hai Ha Nguyen and Ryo Takata and Shusuke Akamatsu and Daichi Shigemizu and Tatsuhiko Tsunoda and Mutsuo Furihata and Atsushi Takahashi and Michiaki Kubo and Naoyuki Kamatani and Osamu Ogawa and Tomoaki Fujioka and Yusuke Nakamura and Hidewaki Nakagawa},
  journal={Human molecular genetics},
  year={2012},
  volume={21 9},
  pages={
          2076-85
        }
}
Recent genome-wide association studies (GWAS) identified a number of prostate cancer (PC) susceptibility loci, but most of their functional significances are not elucidated. Through our previous GWAS for PC in a Japanese population and subsequent resequencing and fine mapping, we here identified that IRX4 (Iroquois homeobox 4), coding Iroquois homeobox 4, is a causative gene of the PC susceptibility locus (rs12653946) at chromosome 5p15. IRX4 is expressed specifically in the prostate and heart… 

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References

SHOWING 1-10 OF 34 REFERENCES
A functional variant in NKX3.1 associated with prostate cancer susceptibility down-regulates NKX3.1 expression.
TLDR
Results suggest that the functional variant rs11781886 in the 5'-UTR of NKX3.1 can affect its transcription by altering the binding affinity of a transcriptional factor Sp1, and might result in PC susceptibility by lowering expression of NKx3.
Homeobox gene IRX1 is a tumor suppressor gene in gastric carcinoma
TLDR
The hypermethylation of IRX1 was not only detected in primary gastric cancer tissues but also in the peripheral blood of Gastric cancer patients, suggesting IRX 1 could potentially serve as a biomarker for gastriccancer.
The Iroquois Homeobox Gene 5 Is Regulated by 1,25-Dihydroxyvitamin D3 in Human Prostate Cancer and Regulates Apoptosis and the Cell Cycle in LNCaP Prostate Cancer Cells
TLDR
It is shown that the Iroquois homeobox gene 5 (Irx5) is down-regulated by 1,25(OH)2D3 in human prostate cancer samples from patients randomly assigned to receive weekly high-dose 1, 25(OH), 2D3 or placebo before radical prostatectomy.
Association of a novel long non‐coding RNA in 8q24 with prostate cancer susceptibility
Recent genome‐wide association studies reported strong and reproducible associations of multiple genetic variants in a large “gene‐desert” region of chromosome 8q24 with susceptibility to prostate
Genome-wide association study of prostate cancer identifies a second risk locus at 8q24
TLDR
Observations indicate the presence of at least two independent loci within 8q24 that contribute to prostate cancer in men of European ancestry, and it is estimated that the population attributable risk of the new locus, marked by rs6983267, is higher than the locus marked byrs1447295.
Multiple loci identified in a genome-wide association study of prostate cancer
TLDR
The findings point to multiple loci with moderate effects associated with susceptibility to prostate cancer that, taken together, in the future may predict high risk in select individuals.
Fine mapping association study and functional analysis implicate a SNP in MSMB at 10q11 as a causal variant for prostate cancer risk.
TLDR
The observations that rs10993994 is the strongest associated variant in the region and its risk allele has a major effect on the transcriptional activity of MSMB, a gene with previously described prostate cancer suppressor function, together suggest the T allele of rs10 993994 as a potential causal variant at 10q11 that confers increased risk of prostate cancer.
Genome-wide association study identifies five new susceptibility loci for prostate cancer in the Japanese population
TLDR
Five new loci for prostate cancer susceptibility are reported here, at 5p15 (λ-corrected probability PGC = 3.9 × 10−18), GPRC6A/RFX6 (PGC = 1.6 ×10−12), 13q22 ( PGC = 2.8 × 10–10−9), C2orf43 (PGD = 7.5 × 10.–8) and FOXP4 (PGE = 7−8).
Seven prostate cancer susceptibility loci identified by a multi-stage genome-wide association study
TLDR
The results of stage 3 are reported, in which 1,536 SNPs are evaluated in 4,574 individuals with prostate cancer (cases) and 4,164 controls and a SNP in TERT more strongly associated with PrCa than that previously reported is identified.
Cellular expression levels of the vitamin D receptor are critical to its transcriptional regulation by the pituitary transcription factor Pit-1.
TLDR
It was demonstrated that up-regulation of VDR transcription by Pit-1 is dependent on the presence ofVDR protein, suggesting that transcriptional expression of V DR in a given cell type isdependent on, among other factors, its own expression levels.
...
1
2
3
4
...