Immunohistochemical detection of metalloproteinase-9 (MMP-9), anti-oxidant like 1 protein (AOP-1) and synaptosomal-associated protein (SNAP-25) in the cerebella of dogs naturally infected with spontaneous canine distemper

Lívia C. Bregano; Sabrina D. Agostinho; Flávio L.B.T. Roncatti; Marcília C. Pires; Henrique G. Riva; Maria C.R. Luvizotto; Tereza C. Cardoso

doi:10.5603/FHC.2011.0007

Vol 49, No 1 (2011)

Original paper

Submitted: 2011-12-19

Published online: 2011-04-19

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Immunohistochemical detection of metalloproteinase-9 (MMP-9), anti-oxidant like 1 protein (AOP-1) and synaptosomal-associated protein (SNAP-25) in the cerebella of dogs naturally infected with spontaneous canine distemper

Lívia C. Bregano, Sabrina D. Agostinho, Flávio L.B.T. Roncatti, Marcília C. Pires, Henrique G. Riva, Maria C.R. Luvizotto, Tereza C. Cardoso

DOI: 10.5603/FHC.2011.0007

Folia Histochem Cytobiol 2011;49(1):41-48.

Vol 49, No 1 (2011)

ORIGINAL PAPERS

Submitted: 2011-12-19

Published online: 2011-04-19

Abstract

In most viral infections of the central nervous system (CNS), the integrity of brain extracelluar matrix (ECM), oxidative stress and dysfunction in neuronal transmission may contribute to the observed pathology. The purpose of this study was to investigate the role of these factors in demyelinating canine distemper virus (CDV) infections. Regardless of ECM integrity, the expression of metalloproteinase-9 (MMP-9) was visualized in microglial-like cells, whereas the expression of anti-oxidant like-1 (AOP-1) and synaptosomal associated protein (SNAP-25) was frequently detected in Purkinje cells (r² = 0.989; p < 0.05), regardless of whether the lesions were classified as acute or chronic. Increased numbers of immunolabeled microglia-like cells and reactive gliosis were observed in advanced cases of demyelinating CDV, suggesting that the expression of AOP-1 and SNAP-25 is correlated with the ultimate death of affected cells. Our findings bring a new perspective to understanding the role of the AOP-1, MMP-9 and SNAP-25 proteins in mediating chronic leukoencephalitis caused by CDV. (Folia Histochemica et Cytobiologica 2011; Vol. 49, No. 1, pp. 41–48)

Abstract

In most viral infections of the central nervous system (CNS), the integrity of brain extracelluar matrix (ECM), oxidative stress and dysfunction in neuronal transmission may contribute to the observed pathology. The purpose of this study was to investigate the role of these factors in demyelinating canine distemper virus (CDV) infections. Regardless of ECM integrity, the expression of metalloproteinase-9 (MMP-9) was visualized in microglial-like cells, whereas the expression of anti-oxidant like-1 (AOP-1) and synaptosomal associated protein (SNAP-25) was frequently detected in Purkinje cells (r² = 0.989; p < 0.05), regardless of whether the lesions were classified as acute or chronic. Increased numbers of immunolabeled microglia-like cells and reactive gliosis were observed in advanced cases of demyelinating CDV, suggesting that the expression of AOP-1 and SNAP-25 is correlated with the ultimate death of affected cells. Our findings bring a new perspective to understanding the role of the AOP-1, MMP-9 and SNAP-25 proteins in mediating chronic leukoencephalitis caused by CDV. (Folia Histochemica et Cytobiologica 2011; Vol. 49, No. 1, pp. 41–48)

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Keywords

CDV; antioxidative stress; protein expression

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Title

Immunohistochemical detection of metalloproteinase-9 (MMP-9), anti-oxidant like 1 protein (AOP-1) and synaptosomal-associated protein (SNAP-25) in the cerebella of dogs naturally infected with spontaneous canine distemper

Journal

Folia Histochemica et Cytobiologica

Issue

Vol 49, No 1 (2011)

Article type

Original paper

Pages

41-48

Published online

2011-04-19

Page views

1939

Article views/downloads

2369

DOI

10.5603/FHC.2011.0007

Bibliographic record

Folia Histochem Cytobiol 2011;49(1):41-48.

Keywords

CDV
antioxidative stress
protein expression

Authors

Lívia C. Bregano
Sabrina D. Agostinho
Flávio L.B.T. Roncatti
Marcília C. Pires
Henrique G. Riva
Maria C.R. Luvizotto
Tereza C. Cardoso