Caveolin-1 in meningiomas: expression and clinico-pathological correlations.
Caveolin-1 (Cav-1) protein has been documented in several neoplasms with a controversial role in cell proliferation, tumour development and progression. The aim of the present study was to investigate the Cav-1 immunohistochemical expression in human meningiomas. Sixty-two cases, classified as 11 meningothelial (17%), 12 transitional (19%), 5 fibrous (8%), 3 microcystic (5%), 3 secretory (5%), 1 clear cell (2%), 1 chordoid (2%) and 26 (42%) atypical meningiomas, were selected from our pathological files. Clinico-pathological data, including Ki-67 values and survival data were also available. Ten leptomeningeal samples were utilized as normal tissue control. For each case, a polyclonal antibody against Cav-1 was applied and an intensity distribution (ID) score was determined. The Cav-1 immunoexpression was found in 95% of meningiomas with a variable ID score, while only minimal, not uniform, reactivity was noted in non-neoplastic meninges. Of note, higher Cav-1 ID score was significantly correlated with tumour site, Simpson's grade, histological type, higher histologic grade, Ki-67 labelling index > or = 4% and clinical course. Kaplan-Meier curves demonstrated a significantly worse survival in patients with higher Cav-1 ID score, Ki-67 > or = 4% and 2-3 Simpson grade. Multivariate analysis indicated that only Ki-67 was an independent prognostic factor. Increased immunoexpression of the Cav-1 seems to be associated with the biological aggressiveness of meningiomas, reflecting a worse prognosis.
Barresi
V
V
Dipartimento di Patologia Umana, Università degli Studi di Messina, Messina, Italy. valeriabarresi@hotmail.com
Cerasoli
S
S
Paioli
G
G
Vitarelli
E
E
Giuffrè
G
G
Guiducci
G
G
Tuccari
G
G
Barresi
G
G
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D051242:Caveolin 1 / Q000235:genetics / Q000378:metabolism*; D049109:Cell Proliferation; D018450:Disease Progression; D005260:Female; D015972:Gene Expression Regulation, Neoplastic; D006801:Humans; D053208:Kaplan-Meier Estimate; D019394:Ki-67 Antigen / Q000378:metabolism; D008297:Male; D008577:Meningeal Neoplasms / Q000235:genetics / Q000378:metabolism* / Q000473:pathology*; D008579:Meningioma / Q000235:genetics / Q000378:metabolism* / Q000473:pathology*; D008875:Middle Aged; D011237:Predictive Value of Tests; D011379:Prognosis
D051242:Caveolin 1; D019394:Ki-67 Antigen