Expression of platelet-derived endothelial cell growth factor in oral and oropharyngeal carcinoma.
Platelet-derived endothelial cell growth factor (PD-ECGF) was isolated as an endothelial cell mitogen from platelets. In this study, we investigated the expression of PD-ECGF and counted microvessels in 58 oral and oropharyngeal squamous cell carcinoma (SCC) specimens by an immunohistochemical technique to examine their prognostic significance and performed tumor in vitro sensitivity to 5-fluorouracil (5-FU) and cisplatin as determined by a bioluminescence assay of the ATP values of tumor cells after continuous exposure. The percentage of PD-ECGF-positive tumor cells (PD-ECGF score) was correlated with the frequency of the recurrence of disease (P=0.0043) but not with sex, tumor size, metastasis, or clinical stage. Overall survival of the high PD-ECGF expression group (>40% PD-ECGF score) was shorter than the low expression (<40%) group (P=0.0365). Vessel count was correlated with lymph node metastasis and clinical stage. The survival of patients with hypervascularity (more than the median of intratumor vessel counts, >82) was shorter than that of those with hypovascularity (vessel count <81, P=0.0446). However, there was no association between PD-ECGF expression and vessel count. Cox proportional multivariate analysis showed that PD-ECGF expression was the most significant independent prognostic indicator for overall survival. The susceptibility to 5-FU cytotoxicity in the extremely high PD-ECGF expression groups (>70% of PD-ECGF score) was significantly higher than that in the low group, whereas there was no difference in their sensitivity to cisplatin. These results showed that carcinoma cells with high PD-ECGF expression were sensitive to 5-FU in spite of poor prognosis. These data provide further information when deciding on adjuvant therapy for oral and oropharyngeal SCCs.
Department of Otorhinolaryngology, Fukui Medical University, Yoshida, Japan. sfujieda@fmsrsa.fukui-med.ac.jp
S
S
Fujieda
H
H
Sunaga
H
H
Tsuzuki
N
N
Tanaka
H
H
Saito
D000704:Analysis of Variance; D000964:Antimetabolites, Antineoplastic / Q000627:therapeutic use; D002294:Carcinoma, Squamous Cell / Q000098:blood supply / Q000188:drug therapy / Q000378:metabolism* / Q000401:mortality; D005260:Female; D005472:Fluorouracil / Q000627:therapeutic use; D006801:Humans; D008297:Male; D008875:Middle Aged; D009062:Mouth Neoplasms / Q000098:blood supply / Q000188:drug therapy / Q000378:metabolism* / Q000401:mortality; D009363:Neoplasm Proteins / Q000378:metabolism*; D009364:Neoplasm Recurrence, Local / Q000098:blood supply / Q000188:drug therapy / Q000378:metabolism / Q000401:mortality; D009389:Neovascularization, Pathologic / Q000401:mortality; D009959:Oropharyngeal Neoplasms / Q000098:blood supply / Q000188:drug therapy / Q000378:metabolism* / Q000401:mortality; D016016:Proportional Hazards Models; D013939:Thymidine Phosphorylase / Q000378:metabolism*; D013997:Time Factors
D000964:Antimetabolites, Antineoplastic; D009363:Neoplasm Proteins; D013939:Thymidine Phosphorylase; D005472:Fluorouracil