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Immunohistochemical Staining Properties of Osteopontin and Ki-67 in Feline Meningiomas.

Authors :
Gradner, Gabriele
Janssen, Janina
Oevermann, Anna
Tichy, Alexander
Kummer, Stefan
Burger, Stefanie
Walter, Ingrid
Source :
Animals (2076-2615). Dec2024, Vol. 14 Issue 23, p3404. 12p.
Publication Year :
2024

Abstract

Simple Summary: In this study, 53 feline tissue samples from an intracranial tumor called a meningioma were examined for the presence of two specific markers. The Ki-67 index, an indicator of tissue proliferation, and osteopontin, an indicator for proliferation, were evaluated after a standard histopathological grading according to WHO guidelines. High expression of both markers was found, which may explain the high recurrence rate in feline meningiomas. The high recurrence rate of feline meningioma despite the generally benign histomorphology warrants additional markers of clinical aggressiveness. The Ki-67 index is commonly used as prognostic marker for meningioma recurrence in people. Osteopontin (OPN) is a protein involved in tumor progression and may be a potential malignancy marker. To date, osteopontin expression has not been investigated in feline meningioma. The aim of this study was to evaluate the extent of Ki-67 and osteopontin immunostaining of feline meningioma and to find possible associations with WHO (World Health Organization) grades and subtypes. Fifty-three feline meningioma samples were graded according to the human WHO classification and underwent immunohistochemical examination for Ki-67 and OPN. Fifty samples were classified as WHO grade I and three as WHO grade II. The mean Ki-67 ratio was 9.19 ± 9.47. Osteopontin expression was correspondingly high with a mean OPN IHC score of 150.17 (0–242.8), and a median Allred score of 7 (0–8). There was no significant correlation with Ki-67 index, osteopontin expression, WHO grades, or subtypes. The overall high expressions of osteopontin and Ki-67 may help explain the tendency for recurrence of feline meningioma. The human WHO grading system may not be sufficient to accurately estimate the clinical behavior of meningioma in this species. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
20762615
Volume :
14
Issue :
23
Database :
Academic Search Index
Journal :
Animals (2076-2615)
Publication Type :
Academic Journal
Accession number :
181661179
Full Text :
https://doi.org/10.3390/ani14233404