title: Expression of pigment epithelium-derived factor decreases liver metastasis and correlates with favorable prognosis for patients with ductal pancreatic adenocarcinoma.
abstract: Pigment epithelium-derived factor (PEDF) is expressed in several normal organs and identified as an inhibitor of neovascularization. In the present study, we screened the expression of PEDF immunohistochemically and investigated its correlation with clinicopathological features in patients who underwent surgery for ductal pancreatic adenocarcinoma. Of the 80 patients, 22 cases (27.5%) were positive for PEDF. A significant association was found between the PEDF expression and low microvessel density (P = 0.0003). No correlation was found between PEDF expression and age, gender, depth of invasion, tumor diameter, lymphatic invasion, venous, invasion or histopathological grading. The patients in pathological stage II had a significantly higher incidence of PEDF-positive expression than those in pathological stage III or IVA (P = 0.0418). PEDF immunoreactivity was inversely associated with liver metastasis (P = 0.0422). The survival of patients that were PEDF positive was significantly longer than that of those with negative expression (P = 0.0026). Multivariate analysis using the Cox regression model indicated that PEDF-positive expression was an independent favorable prognostic factor (risk ratio, 0.394; P = 0.0016). We conclude that PEDF expression suggests a more favorable prognosis than in patients whose carcinomas lack PEDF expression.
authors.affiliation: Department of Surgical Oncology, Division of Cancer Medicine, Hokkaido University Graduate School of Medicine, Sapporo, Hokkaido, Japan. h-uehara@qd5.so-net.ne.jp
authors.forename: Hirofumi
authors.initials: H
authors.lastname: Uehara
authors.forename: Masaki
authors.initials: M
authors.lastname: Miyamoto
authors.forename: Kentaro
authors.initials: K
authors.lastname: Kato
authors.forename: Yuma
authors.initials: Y
authors.lastname: Ebihara
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Kaneko
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Hashimoto
authors.forename: Yoshihiro
authors.initials: Y
authors.lastname: Murakami
authors.forename: Ryunosuke
authors.initials: R
authors.lastname: Hase
authors.forename: Ryo
authors.initials: R
authors.lastname: Takahashi
authors.forename: Seiji
authors.initials: S
authors.lastname: Mega
authors.forename: Toshiaki
authors.initials: T
authors.lastname: Shichinohe
authors.forename: You
authors.initials: Y
authors.lastname: Kawarada
authors.forename: Tomoo
authors.initials: T
authors.lastname: Itoh
authors.forename: Shunichi
authors.initials: S
authors.lastname: Okushiba
authors.forename: Satoshi
authors.initials: S
authors.lastname: Kondo
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Katoh
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D021441:Carcinoma, Pancreatic Ductal / Q000378:metabolism* / Q000473:pathology / Q000556:secondary*; D005136:Eye Proteins; D005260:Female; D006801:Humans; D007150:Immunohistochemistry; D008113:Liver Neoplasms / Q000378:metabolism* / Q000556:secondary*; D008297:Male; D008875:Middle Aged; D015999:Multivariate Analysis; D009367:Neoplasm Staging; D009414:Nerve Growth Factors; D010190:Pancreatic Neoplasms / Q000378:metabolism* / Q000473:pathology*; D011379:Prognosis; D014176:Protein Biosynthesis; D015843:Serpins / Q000096:biosynthesis*; D015996:Survival Rate; D000099174:Pigment Epithelium-Derived Factor
chemical_list: D005136:Eye Proteins; D009414:Nerve Growth Factors; D015843:Serpins; D000099174:Pigment Epithelium-Derived Factor