This meta-analysis demonstrates that both the C1772T and G1790A polymorphisms in the HIF-1α gene likely contribute to increased cancer susceptibility, especially in the Asian population and in breast cancer, lung cancer, pancreatic cancer and oral cancer.
We evaluated dietary factors associated with oxidative balance, DDIT4 (one SNP), FLT1 (35 SNPs), HIF1A (four SNPs), KDR (19 SNPs), MPO (one SNP), NOS2A (15 SNPs), TEK (40 SNPs) and VEGFA (eight SNPs) and breast cancer risk among Hispanic (2,111 cases and 2,597 controls) and non-Hispanic white (1,481 cases and 1,586 controls) women in the Breast Cancer Health Disparities Study.
Considered the comparison of sample size and potential heterogeneity of previous case-control studies, we concluded that HIF-1rs11549467 has a marginal effect on BC risk.
The CC and CA genotype frequency of HIF-1α g.C111A polymorphism was 100 vs 99% and 0 vs 1% in breast cancer patients and healthy controls respectively.
Taken together, the hypomethylation status at non-CpG and CpG loci in HIF-1α promoter and H3K9ac modification together contribute to maintain higher HIF-1αactivity in invasive breast cancer cells when compared with the non-invasive breast cancer cells, which may establish a tissue-specific epigenetic modification pattern and point to the new directions for future understanding breast cancer therapy.
HSP70-2 P1/P2, HSPA8 intronic 1541-1542delGT and HIF-1 alpha polymorphisms were not associated with breast cancer risk, as evidenced by the dose-response allele models.
Our meta-analysis suggests that the HIF-1alpha1772 C/T polymorphism is significantly associated with higher cancer risk, and 1790 G/A polymorphism is significantly associated with decreased breast cancer risk.
Enhancement of vascular endothelial growth factor release in long-term drug-treated breast cancer via transient receptor potential channel 5-Ca(2+)-hypoxia-inducible factor 1α pathway.
The increased percentage of HIF-1α-positive tumors formed during adjuvant tamoxifen suggests a role for HIF-1α in escaping tamoxifen's restraining effects on breast cancer.
These results clearly indicated that HIF-1α + COXIV + c-MYC (+ HER2 for HER2+ subtype) may be useful to depict a breast cancer metabolic marker pattern for diagnosis, whereas the contents of HIF-1α + c-MYC + 2OGDH + E-cadherin may be an alternative useful and reliable signature for TN subtype cancer prognosis.
Altogether, the results provide novel and compelling experimental evidence that (i) prolonged exposure to T2DM promotes BCa progression; (ii) the hyperinsulinemia/HIF-1α/oxidative stress cascade is the major mediator of this effect.
Our study shows distinct functions of hypoxia in regulating angiogenesis and metastasis in different organ microenvironments and establishes HIF-1alpha as a promising target for controlling organotropic metastasis of breast cancer.
The Milk Protein Alpha-Casein Suppresses Triple Negative Breast Cancer Stem Cell Activity Via STAT and HIF-1alpha Signalling Pathways in Breast Cancer Cells and Fibroblasts.