In this paper we prove, if θ∈C([0,∞),H2−2α(R2)) is a global solution of supercritical surface Quasi-Geostrophic equation with small initial data, then ‖θ(t)‖H2−2α decays to zero as time goes infinity. Fourier analysis and standard techniques are used.

The transcription factor hypoxia-inducible 2α (HIF-2α) is a key oncogenic driver in clear cell renal carcinoma (ccRCC). HIF-2α protein levels are tightly regulated post-translationally an oxygen-dependent manner. Hypoxic conditions or aberrations the Von-Hippel Lindau (VHL) ubiquitin ligase complex lead to stabilization and of various pro-tumorigenic gene sets. Clinical evidence indicates that ...

Objective This study aimed to investigate the effects of hypoxia-inducible factor-1α (HIF-1α), factor-2α (HIF-2α), and erythroferrone (ERFE) on hepcidin in patients with chronic kidney disease (CKD) stages 3–5 renal anemia. Methods A total 90 CKD anemia were selected for at Nephrology Department Fujian Provincial People’s Hospital divided into three groups, according stage, while another 30 hea...

Objective: To identify the prognostic significance of CD147 and HIF-2α expressions in localized clear cell renal cell carcinoma (ccRCC). Methods: Tissue microarrays of 74 cases of ccRCC without distant metastasis or invasion were performed by CD147 and HIF-2α immunohistochemical staining. The expressions were qualified by intensity and percentage of tumor cells stained. Results: Increased expre...

Transcription factor activator protein 2α (AP-2α) is a negative regulator of adipogenesis by repressing the transcription of CCAAT/enhancer binding protein (C/EBPα) gene. During adipogenesis, AP-2α is degraded, leading to transcriptional up-regulation of C/EBPα. However, the mechanism for AP-2α degradation is not clear. Here, using immunoprecipitation assay and mass spectrometry, we identified ...

Activating enhancer-binding protein-2α (AP-2α) regulates the expression of many cancer-related genes. Here, we demonstrated a novel mechanism by which AP-2α up-regulated cyclooxygenase-2 (COX-2) expression to promote the growth of nasopharyngeal carcinomas (NPCs). High expression of AP-2α in NPC cell lines and tumor tissues from NPC patients was detected and significantly correlated with COX-2 ...

Constitutive functional HIF-2α was recently identified in cancer and stem cell lines under normoxia. In this study, BEAS-2B, a bronchial epithelial cell line, was shown to constitutively express active HIF-2α under normoxia and exhibit markers of pluripotency including Oct-4, Nanog, and sphere formation. Oct-4 expression was reduced after knockdown of HIF-2α under normoxia. Global enrichment an...

Sleep-disordered breathing with recurrent apnea produces chronic intermittent hypoxia (IH). We previously reported that IH leads to down-regulation of HIF-2α protein via a calpain-dependent signaling pathway resulting in oxidative stress. In the present study, we delineated the signaling pathways associated with calpain-dependent HIF-2α degradation in cell cultures and rats subjected to chronic...

In soft tissue sarcomas (STS), low intratumoural O2 (hypoxia) is a poor prognostic indicator. HIF-1α mediates key transcriptional responses to hypoxia, and promotes STS metastasis; however, the role of the related HIF-2α protein is unknown. Surprisingly, here we show that HIF-2α inhibits high-grade STS cell growth in vivo, as loss of HIF-2α promotes sarcoma proliferation and increases calcium a...