Laboratory Medicine ›› 2023, Vol. 38 ›› Issue (4): 330-336.DOI: 10.3969/j.issn.1673-8640.2023.04.006

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Expression and interaction of TRX and TXNIP in colorectal cancer

YANG Jielin, WANG Xiaoyuan, LI Haixia   

  1. Department of Gastroenterology,the First Affiliated Hospital of Hebei North University,Zhangjiakou 075000,Hebei,China
  • Received:2021-10-14 Revised:2023-02-03 Online:2023-04-28 Published:2023-06-21

Abstract:

Objective To investigate the interaction of thioredoxin(TRX) and thioredoxin-interacting protein(TXNIP) in colorectal cancer. Methods Totally,116 patients with colorectal cancer and 116 patients with rectal adenoma who underwent surgical treatment in the First Affiliated Hospital of Hebei North University from January 2019 to June 2020 were enrolled. The tissue samples [cancer tissue,adjacent tissue(4-5 cm from the lower edge of tumor) and adenoma tissue(precancerous lesion)] were collected,and the clinical data from all the patients were collected. The expressions of TRX and TXNIP in the 3 tissue samples were determined by immunohistochemistry. Immunoblotting and real-time fluorescence quantitative polymerase chain reaction(RT-qPCR) were used to determine the relative expressions of TRX,TXNIP protein and mRNA in the 3 tissue samples. The interaction between TRX and TXNIP in colorectal cancer was evaluated by generalized multifactor dimensionality reduction(GMDR). Results The positive expression rates of TRX and TXNIP among cancer tissue,adenoma tissue and adjacent tissue had statistical significance(P<0.05). The relative expressions of TRX mRNA and protein were decreased in turn(P<0.05),and the relative expressions of TXNIP mRNA and protein were increased in turn(P<0.05). The positive expression rate of TRX had statistical significance among colorectal cancer patients with or without lymph metastasis,different depths of invasion,different levels of carcinoembryonic antigen,different TNM stages and different tumor locations(P<0.05). The positive expression rate of TXNIP had statistical significance among colorectal cancer patients with or without lymph metastasis,different clinical stages,different depths of invasion,different T stages and different N stages(P<0.05). GMDR interaction analysis showed that there was an interaction between low expressions of TXNIP protein and mRNA and high expressions of TRX protein and mRNA in colorectal cancer. Conclusions Both TRX and TXNIP are abnormally expressed in colorectal cancer,and they may play a role in the occurrence and development of colorectal cancer.

Key words: Thioredoxin, Thioredoxin-interacting protein, Colorectal cancer, Interaction

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