[Prognostic value study of lung cancer molecular markers].
OBJECTIVE
The aim of this study was to determine the prognostic value of molecular markers (proteins) of different paths of lung cancer development in patients with non small cell lung carcinoma (NSCLC) in initial stages.


METHODS
Observational, cohort study in patients with NSCLC that was initially treated surgically in our hospital between October 1993 and September 1997. Thirty-two proteins were selected. The study consisted of the elaboration of tissue arrays with samples from resected tumour, using a semiquantitative immunohistochemical study. A prognosis analysis was done with the expression of each protein and calculation of the overall 5-year survival rate. The Wilcoxon-Gehan and Log-Rank tests were used for statistical comparisons, with p<.05 being considered to indicate a significant result.


RESULTS
One hundred and forty six patients were studied. The overall 5-year survival rate was 37.7%. From 32 proteins studied, three were statistically associated with overall 5-year survival rate. RB protein expression in resected NSCLC was a positive prognostic factor (P=.01). P27 (P=.03) and Ki67 (P=.04) expression in resected NSCLC were negative prognostic factors. There was no protein with prognostic value in epidermoid tumours.


CONCLUSIONS
We found three proteins with long-term prognostic value in the long-term in the general population and five adenocarcinoma prognostic proteins in our study of resected non-small cell lung cancer (NSCLC). In the future, genetic-molecular factors should be included along with anatomical (TNM staging) and clinical factors in a multidimensional lung cancer staging.
García Luján
Ricardo
R
Servicio de Neumología, Hospital Universitario 12 de Octubre, Madrid, España. rglujan@hotmail.com
Conde Gallego
Esther
E
López Ríos
Fernando
F
Martín De Nicolás
José Luis
JL
Sánchez Céspedes
Montserrat
M
García Quero
Cristina
C
López Encuentra
Angel
A
D000368:Aged; D014408:Biomarkers, Tumor / Q000032:analysis*; D002289:Carcinoma, Non-Small-Cell Lung / Q000737:chemistry* / Q000378:metabolism / Q000401:mortality*; D015331:Cohort Studies; D005260:Female; D006801:Humans; D008175:Lung Neoplasms / Q000737:chemistry* / Q000378:metabolism / Q000401:mortality*; D008297:Male; D008875:Middle Aged; D009363:Neoplasm Proteins / Q000032:analysis* / Q000096:biosynthesis; D011379:Prognosis; D015996:Survival Rate
D014408:Biomarkers, Tumor; D009363:Neoplasm Proteins