Laboratory Medicine ›› 2022, Vol. 37 ›› Issue (1): 36-40.DOI: 10.3969/j.issn.1673-8640.2022.01.007

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Correlation between serum C peptide and insulin-like growth factor binding protein 3 and the risk of breast cancer patient death

ZHANG Xinyue1, CHEN Liang2, ZHENG Yu1()   

  1. 1. Department of General Surgery,Hai'an People's Hospital,Hai'an 226600,Jiangsu,China
    2. Department of Ultrasound,Hai'an People's Hospital,Hai'an 226600,Jiangsu,China
  • Received:2021-03-05 Revised:2021-10-12 Online:2022-01-30 Published:2022-03-07
  • Contact: ZHENG Yu

Abstract:

Objective To investigate the correlation between serum C peptide and insulin-like growth factor binding protein 3(IGFBP-3) and the risk of breast cancer patient death. Methods Totally,339 patients with breast cancer were enrolled and followed up for 2-4 years. The general clinical data(age,sex,physical activity,smoking history,drinking history,height,body mass and waist circumference) of all the patients were collected,the body mass index(BMI) was calculated,and the levels of C peptide,fasting insulin(FINS),fasting blood glucose(FBG),serum creatinine(SCr) and IGFBP-3 were determined. Cox regression analysis was used to assess the relationship between the indicators and the risk of breast cancer patient death. Results BMI,waist circumference,C peptide and IGFBP-3 levels in death group were higher than those in survival group(P<0.05). There was no statistical significance in the other indicators between the 2 groups(P>0.05). According to the four percentiles of C peptide,the patients were classified into 4 groups. Compared with those of C peptide≤0.39 nmol/L,serum IGFBP-3 levels of C peptide 0.40-0.62 nmol/L group,C peptide 0.63-1.02 nmol/L group,C peptide≥1.03 nmol/L group were increased(P<0.05) with the trend of P<0.000 1,indicating that it was related to C peptide. According to FINS's four percentiles,4 subgroups of breast cancer patients were grouped. There was no statistical significance in serum IGFBP-3 level among the 4 groups(P>0.05) with the trend of P>0.05,indicating that serum IGFBP-3 had no relation with FINS level. Cox regression analysis showed that C peptide and IGFBP-3 were related to the risk of breast cancer patient death after fully correcting the confounding factors. The hazard ratios(HR) were 1.58 and 1.02,respectively,the 95% confidence intervals(CI) ranged from 1.09 to 2.66 and from 1.01 to 1.91,and the P values were 0.02 and 0.01. Conclusions C peptide and serum IGFBP-3 are related to the risk of breast cancer patient death.

Key words: C peptide, Insulin-like growth factor binding protein-3, Breast cancer

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