To evaluate whether angiogenic factors are of clinical relevance to actual human pancreatic cancers, we studied the intratumoral microvessel density (IMD), and PD-ECGF, VEGF protein expression in 40 pancreatic cancers using immunohistochemistry. We also investigated
PD-ECGF
and
VEGF
gene expression using reverse transcriptase-PCR (RT-PCR). Of the 40 pancreatic cancers studied, 30 carcinomas (75.0%) were evaluated to be
PD-ECGF
-positive and 10 carcinomas (25.0%) were determined to be
PD-ECGF
-negative. In contrast, 27 carcinomas (67.5%) were evaluated to be
VEGF
-positive, whereas 13 carcinomas (32.5%) were
VEGF
-negative.
VEGF
gene expression was moderately associated with an increase in the IMD (
r
2
= 0.181,
P
= 0.006), but no significant relationship was found between
PD-ECGF
gene expression and the IMD (
r
2
= 0.093,
P
= 0.059). However, tumours with positive expression for both
PD-ECGF
and
VEGF
had a higher IMD (
P
= 0.027). The results of the immunohistochemistry agreed well with the results of the quantitative RT-PCR. The median survival time of the hypervascular group was significantly shorter than that of the hypovascular group (
P
< 0.0001). In comparing the survival according to
PD-ECGF
and
VEGF
gene expression, the median survival time of the patients with positive
PD-ECGF
expression was significantly shorter than those with negative
PD-ECGF
expression (
P
= 0.040). Furthermore, the median survival time of the patients with positive
VEGF
expression was significantly shorter than those with negative
VEGF
expression (
P
= 0.048). However, the Cox multivariate analysis indicated that the IMD and
VEGF
expression were independent prognostic factors of the various clinicopathologic variables in pancreatic cancer patients (
P
= 0.0021 and
P
= 0.0443, respectively). © 1999 Cancer Research Campaign