Study on the survival of patients with gastrointestinal cancer versus the expression of LGT fingerprints / 肿瘤研究与临床

ABSTRACT

Objective To demonstrate the result that progression of disease and prognosis of gastrointestinal cancer patients are correlated with the expression of the cluster and the abundance of lost goodwill target (LGT) fingerprint. Methods To research the period of survival and the time of death, 61 patients treated by SELDI (Surface enhanced laser desorption/ionization-time of flight-mass spectrometer)were involved in. According to the fingerprint spectrum obtained by SELDI and the appearance of fingerprints of LGT, these patients were divided into four groups namely non-peak, single-peak, double-peak, tri-peak and multi-peak groups. By means of Multi-factor analysis of variance and Cox regression analysis of risk, we compare four groups each other so as to find out one group in which patients have the greatest risk of death.Results Among the fingerprint spectrums of patients suffered from gastrointestinal cancer, which were obtained by SELDI, the patients with negative expression of LGT had low risk of death, which were lower than those of single-peak and double-peak groups, especially lower than those of tri-peak and multi-peak groups;the risk of death among the tri-peak and multi-peak groups were much higher than single-peak, the difference had statistical significance (P ＜0.05), and the death rate is rather high. Conclusion Among the serums from cancer patients tested by SELDI, the expression of LGT with tri-peak and multi-peak suggested that patient' s state of illness is about to deteriorate. This kind of fingerprint spectrum can be regarded as positive indicators,and the negative expression of LGT suggested that patient will have a good prognosis with a very low risk of death in the near future.