The relationship between RSUME and VHL/HIF-1α signalling pathway in renal cell carcinoma

Yuanliang Wang1, Xin Wang1, Faliang Zhao1

  • 1Departments of Urology, The Affiliated Hospital of Zunyi Medical University, Zunyi, Guizhou, China.

Abstract

Insights

Human RWD containing sumoylation enhancer (RSUME) is upregulated in renal cell carcinoma (RCC). RSUME may promote RCC progression by interacting with the VHL/HIF-1α pathway, suggesting it as a potential therapeutic target.

Area of Science:

  • Oncology
  • Molecular Biology
  • Biochemistry

Background:

  • Renal cell carcinoma (RCC) is characterized by von Hippel-Lindau (VHL) gene loss, leading to HIF pathway activation and tumor development.
  • Human RWD containing sumoylation enhancer (RSUME) is implicated in pituitary tumors, but its role in RCC is unknown.

Purpose of the Study:

  • To investigate the expression levels of VHL, HIF-1α, and RSUME in human RCC tissues.
  • To analyze the correlations between VHL, HIF-1α, and RSUME in RCC.

Main Methods:

  • Immunohistochemistry was used to detect protein expression levels.
  • Real-time PCR was employed to quantify gene expression levels.
  • Expression was analyzed in normal renal tissue and RCC tissue samples.

Main Results:

  • RSUME and HIF-1α were significantly upregulated in RCC tissues compared to normal tissues (p < 0.05).
  • VHL expression was significantly lower in RCC tissues than in normal tissues (p < 0.05).
  • VHL expression was negatively correlated with HIF-1α and RSUME, while RSUME and HIF-1α showed a positive correlation (p < 0.05).

Conclusions:

  • Upregulated RSUME expression is associated with RCC formation and progression.
  • RSUME may exert its effects through the VHL/HIF-1α signaling pathway.
  • RSUME represents a potential novel therapeutic target for renal cell carcinoma.

Related Concept Videos

Regulation of Angiogenesis and Blood Supply01:24

Regulation of Angiogenesis and Blood Supply

Rapidly dividing tumors, embryos, and wounded tissues require more oxygen than usual, lowering the oxygen concentration in the blood. At low oxygen or hypoxic conditions, an oxygen-sensitive transcription factor called the hypoxia-inducible factor 1 or HIF1 is activated. HIF1 is a dimeric protein of alpha (ɑ) and beta (β) subunits.  Under optimal oxygen conditions, HIF1β is present in the nucleus while HIF1ɑ remains in the cytosol. HIF1ɑ is hydroxylated by prolyl hydroxylase and factor...
Rous Sarcoma Virus (RSV) and Cancer01:03

Rous Sarcoma Virus (RSV) and Cancer

Rous Sarcoma virus or RSV was discovered by F. Peyton Rous in the year 1911 as a filterable transmissible agent that could cause tumors in chickens. He won a Nobel Prize for this discovery in 1966. His experiments clearly demonstrated that some cancers could be caused by infectious agents and led to the discovery of many more cancer-causing viruses in animals as well as humans.
RSV is a retrovirus that contains two copies of a plus-strand  RNA genome. Its genome consists of four main open...
Rous Sarcoma Virus (RSV) and Cancer01:03

Rous Sarcoma Virus (RSV) and Cancer

Rous Sarcoma virus or RSV was discovered by F. Peyton Rous in the year 1911 as a filterable transmissible agent that could cause tumors in chickens. He won a Nobel Prize for this discovery in 1966. His experiments clearly demonstrated that some cancers could be caused by infectious agents and led to the discovery of many more cancer-causing viruses in animals as well as humans.
RSV is a retrovirus that contains two copies of a plus-strand  RNA genome. Its genome consists of four main open...
Abnormal Proliferation02:23

Abnormal Proliferation

Under normal conditions, most adult cells remain in a non-proliferative state unless stimulated by internal or external factors to replace lost cells. Abnormal cell proliferation is a condition in which the cell's growth exceeds and is uncoordinated with normal cells. In such situations, cell division persists in the same excessive manner even after cessation of the stimuli, leading to persistent tumors. The tumor arises from the damaged cells that replicate to pass the damage to the daughter...
The Retinoblastoma Gene01:20

The Retinoblastoma Gene

Tumor suppressor genes are normal genes that can slow down cell division, repair DNA mistakes, or program the cells for apoptosis in case of irreparable damage. Hence, they play an essential role in preventing the proliferation of damaged cells.
The first-ever tumor suppressor gene called Rb was identified in retinoblastoma - a rare eye tumor in children. In inherited forms of the disease, a child inherits one defective copy of the Rb gene, which predisposes them to retinoblastoma. However,...
mTOR Signaling and Cancer Progression03:03

mTOR Signaling and Cancer Progression

The mammalian target of rapamycin or mTOR protein was discovered in 1994 due to its direct interaction with rapamycin. The protein gets its name from a yeast homolog called TOR. The mTOR protein complex in mammalian cells plays a major role in balancing anabolic processes such as the synthesis of proteins, lipids, and nucleotides and catabolic processes, such as autophagy in response to environmental cues, such as availability of nutrients and growth factors.
The mTOR pathway or the...