Intracellular Chloride Ion Channel Protein-1 Expression in Clear Cell Renal Cell Carcinoma

Alexandru Nesiu, Anca Maria Cimpean, Raluca Amalia Ceausu, Ahmed Adile, Ioan Ioiart, Camillo Porta, Michele Mazzanti, Tommaso Ciro Camerota, Marius Raica

Research output: Contribution to journalArticlepeer-review


BACKGROUND/AIM: Chloride intracellular channel 1 (CLIC1) represents a promising target for personalized therapy. Our aim was to assess CLIC1 expression in clear cell renal cell carcinoma (cc RCC) and identify its possible prognostic role.

MATERIALS AND METHODS: Fifty cases of cc RCC were evaluated and selected for immunohistochemistry. CLIC1 expression was correlated with tumor grade, invasion and heterogeneity.

RESULTS: A total of 87.5% of the cases were CLIC1 positive, with either a homogeneous (31.42%) or a heterogeneous (68.57%) pattern. Low, mild and strong CLIC1 expressing tumors were defined based on nuclear (N), cytoplasmic (C), membrane (M) or combinations of them (NC, NM, CM, NCM) in terms of CLIC1 distribution. A significant correlation was found between tumor grade and percent of positive tumor cells (p=0.017). For G3 tumors, CLIC1 cytoplasmic expression was strongly correlated with high expression status (p=0.025) and tumor heterogeneity (p=0.004). CLIC1 expression was also correlated with metastasis (p=0.046).

CONCLUSION: We defined four cc RCC groups depending on G, CLIC1 expression and pattern: i) G3/NM/low CLIC1+, ii) G2/CM/mild CLIC1+ iii) G1 or G2/NM or CM /high CLIC1+, and iv) G2/M /high CLIC1.

Original languageEnglish
Pages (from-to)299-307
Number of pages9
JournalCancer Genomics and Proteomics
Issue number4
Publication statusPublished - Jun 28 2019


  • Carcinoma, Renal Cell/genetics
  • Chloride Channels/metabolism
  • Female
  • Humans
  • Male


Dive into the research topics of 'Intracellular Chloride Ion Channel Protein-1 Expression in Clear Cell Renal Cell Carcinoma'. Together they form a unique fingerprint.

Cite this