RESUMO
Objective To investigate the expression and significance of intermedin (IMD) and its.receptors CRLR,RAMP1,RAMP2 and RAMP3 in cancer tissues of patients with non-small cell lung cancer.Methods The mRNA gene expressions of IMD,CRLR,RAMP1,RAMP2 and RAMP3 were detected by realtime quantitative RT-PCR in cancerous and para-cancerous tissues from 27 patients with lung cancer.Results Real-time quantitative PCR detection results showed that the expression of IMD,CRLR,RAMP1,RAMP2 and RAMP3 in cancer tissues were [(59±7.9)×10-8,(96±2.7)×10-6,(29±3.9)×10-9,(14±2.6)×10-6,(65±1.1)×10-6]which were higher than those in adjacent tissues[(40±4.7)×10-10,(21 ±3.9)×10-6,(53±7.8)×10-10,(64±1.9)×10-8,(36±1.3)×10-9] to some extent (all P ＜ 0.05); the higher expression of RAMP3 was found is higher expressions than RAMP1 and RAMP2 in cancer tissues (all P ＜ 0.05).Conclusion The expressions of IMD and its receptors in cancer tissues are higher than those in paracancerous tissues.IMD may play an important role in the development of cancer by activate RAMP3 which is the most high expressed receptor in cancer tissues.Therefore,it might be helpful for the investigation of new gene thereapy in non-small cell lung cancer.