Laboratory Medicine ›› 2022, Vol. 37 ›› Issue (12): 1157-1163.DOI: 10.3969/j.issn.1673-8640.2022.12.011

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Roles of serum amino acid determinations in the diagnosis of early non-small-cell lung cancer

XU Runhao1, ZOU Chen2, CAO Yun1, CHEN Feng1, LIU Yijing1, ZHANG Shulin3, ZHANG Jie1()   

  1. 1. Department of Clinical Laboratory,Renji Hospital,Shanghai Jiao Tong University School of Medicine,Shanghai 200001,China
    2. Department of Clinical Laboratory,Children's Hospital of Shanghai Jiao Tong University,Shanghai 200062,China
    3. Department of Immunology and Microbiology,Shanghai Jiao Tong University School of Medicine,Shanghai 200025,China
  • Received:2021-10-11 Revised:2022-07-15 Online:2022-12-30 Published:2023-02-02
  • Contact: ZHANG Jie,E-mail:Jane_zhanlin@sina.com。

Abstract:

Objective To investigate the roles of serum amino acid determinations in the auxiliary diagnosis of early non-small cell lung cancer(NSCLC). Methods Totally,14 serum amino acids of 64 patients with early NSCLC(early NSCLC group),55 patients with advanced NSCLC(advanced NSCLC group),65 patients with benign pulmonary disease(benign pulmonary disease group) and 80 healthy subjects(healthy control group) were determined by liquid chromatography-tandem mass spectrometry(LC-MS/MS),and serum amino acids included alanine(Ala),glycine(Gly),leucine(Leu),proline(Pro),phenylalanine(Phe),valine(Val),methionine(Met),tyrosine(Tyr),glutamic acid(Glu),arginine(Arg),histidine(His),lysine(Lys),citrulline(Cit) and ornithine(Orn). Carbohydrate antigen(CA) 19-9,carcinoembryonic antigen(CEA),cytokeratin 19 fragment(CYFRA 21-1) and squamous cell carcinoma antigen(SCC-Ag) were determined simultaneously. The stepwise binary Logistic regression analysis was used to fit the best diagnostic combination of various indexes. Receiver operating characteristic(ROC) curve was used to evaluate the diagnostic efficacy of single and combined determinations. Results The levels of serum His and Lys in early NSCLC group were lower than those in healthy control group(P<0.05),and the levels of serum Ala,Glu,Pro,Val,Cit,Orn,CA 19-9,CEA and CYFRA 21-1 in early NSCLC group were higher than those in healthy control group(P<0.05). The levels of serum Ala,Glu,His,Leu,Lys,Pro,Val,Cit,Orn,CA 19-9 and CYFRA 21-1 in early NSCLC group were higher than those in benign pulmonary disease group(P<0.05). The levels of serum Ala,Glu,Leu,Lys and Val in advanced NSCLC group were lower than those in early NSCLC group(P<0.05). There was no statistical significance in the levels of serum SCC-Ag among all the groups(P>0.05). Cit had the best performance in diagnosing early NSCLC,and the area under curve(AUC) was 0.709. The best combination of all the indexes in diagnosing early NSCLC was Glu+Val+Cit+CYFRA 21-1,and the AUC was 0.808. Conclusions The changes of serum aminogram are related to the occurrence and development of NSCLC. The model composed of Glu,Val,Cit and CYFRA 21-1 is potential in the auxiliary diagnosis of early NSCLC.

Key words: Amino acid, Tumor marker, Non-small cell lung cancer, Liquid chromatography-tandem mass spectrometry

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