The intratumoral expression of vascular endothelial growth factor and interleukin-8 associated with angiogenesis in nonsmall cell lung carcinoma patients.
BACKGROUND
Angiogenesis has important effects on tumor growth and metastasis. It is regulated by a variety of angiogenic and angiostatic factors.


METHODS
To evaluate the effects of tumor cell-derived angiogenic factors, we performed an immunohistochemic study to evaluate the intratumoral expression of vascular endothelial growth factor (VEGF) and interleukin-8 (IL-8) in relation to intratumoral microvessel density (IMD) in tumors from 104 nonsmall cell lung carcinoma (NSCLC)patients.


RESULTS
Fifty-four carcinomas were VEGF-positive, 47 carcinomas were IL-8-positive, and 53 carcinomas were hypervascular tumors. There was no significant correlation between the percentages of positive VEGF-staining and positive IL-8-staining in NSCLCs (rho = 0.174, P = 0.080). The IMD of VEGF-positive carcinomas was significantly greater than that of VEGF-negative carcinomas (P = 0.023). In addition, the IMD of IL-8-positive carcinomas was significantly greater than that of IL-8-negative carcinomas (P =0.013). The overall survival rate of patients with hypervascular tumors was significantly lower than that of patients with hypovascular tumors (41.0% versus 67.0%, P = 0.004). Cox proportional-hazards regression model also demonstrated that angiogenesis was one of the significant factors in predicting the survival of NSCLC patients (relative risk = 1.944, P = 0.041).


CONCLUSIONS
Intratumoral expression of VEGF and IL-8 was associated with angiogenesis in NSCLCs. Tumor angiogenesis significantly affected the prognosis of NSCLC patients.
Masuya
D
D
Second Department of Surgery, Kagawa Medical University, Kagawa, Japan.
Huang
C
C
Liu
D
D
Kameyama
K
K
Hayashi
E
E
Yamauchi
A
A
Kobayashi
S
S
Haba
R
R
Yokomise
H
H
D000328:Adult; D000368:Aged; D014408:Biomarkers, Tumor; D002289:Carcinoma, Non-Small-Cell Lung / Q000098:blood supply / Q000473:pathology*; D016228:Endothelial Growth Factors / Q000096:biosynthesis*; D005260:Female; D015972:Gene Expression Regulation, Neoplastic; D006801:Humans; D007150:Immunohistochemistry; D016209:Interleukin-8 / Q000096:biosynthesis*; D008175:Lung Neoplasms / Q000098:blood supply / Q000473:pathology*; D008222:Lymphokines / Q000096:biosynthesis*; D008297:Male; D008875:Middle Aged; D009389:Neovascularization, Pathologic; D011379:Prognosis; D016019:Survival Analysis; D042461:Vascular Endothelial Growth Factor A; D042442:Vascular Endothelial Growth Factors
D014408:Biomarkers, Tumor; D016228:Endothelial Growth Factors; D016209:Interleukin-8; D008222:Lymphokines; D042461:Vascular Endothelial Growth Factor A; D042442:Vascular Endothelial Growth Factors