Expression of HIF‑α and their association with clinicopathological parameters in clinical renal cell carcinoma
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View abstract on PubMed
Summary
This summary is machine-generated.Hypoxia-inducible factor (HIF)-α proteins are elevated in clear cell renal cell carcinoma (ccRCC) nuclei. Nuclear HIF-1α and HIF-3α expression showed a univariate association with cancer-specific survival in ccRCC patients.
Area Of Science
- Oncology
- Molecular Biology
- Pathology
Background
- The hypoxia pathway is crucial in cancer development and progression.
- Hypoxia-inducible factor (HIF)-α proteins (HIF-1α, HIF-2α, HIF-3α) are key regulators of the cellular response to hypoxia.
- Understanding HIF-α protein expression in renal cell carcinoma (RCC) is vital for prognostic assessment.
Purpose Of The Study
- To investigate the cellular localization and expression levels of HIF-1α, HIF-2α, and HIF-3α in RCC.
- To correlate HIF-α protein expression with clinicopathological parameters.
- To determine the association between HIF-α expression and patient survival in RCC.
Main Methods
- Immunohistochemistry (IHC) was performed on a tissue microarray (TMA) of 150 clear cell RCC (ccRCC) and 31 non-ccRCC samples.
- Antibodies against HIF-1α, HIF-2α, and HIF-3α were used to assess protein expression and cellular localization (nuclear vs. cytoplasmic).
- Statistical analyses were conducted to correlate expression levels with clinicopathological features and cancer-specific survival (CSS).
Main Results
- HIF-α proteins exhibited higher expression in the nucleus compared to the cytoplasm across all RCC types.
- Nuclear expression of all HIF-α proteins was significantly elevated in ccRCC versus non-ccRCC.
- Nuclear HIF-1α and HIF-3α expression were significantly associated with CSS in univariate analysis for ccRCC patients, but this lost significance in multivariate analysis.
Conclusions
- Nuclear localization is a predominant feature of HIF-α protein expression in RCC.
- HIF-1α and HIF-3α nuclear expression levels are potential prognostic indicators in ccRCC, particularly in univariate analyses.
- These findings underscore the importance of HIF-α proteins in the hypoxia pathway and their potential role in RCC pathogenesis and prognosis.
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