The Assessment of Major Histocompatibility Complex (MHC) Class-I Expression in Different Neuromuscular Diseases.
Degener Neurol Neuromuscul Dis
; 11: 61-68, 2021.
Article
em En
| MEDLINE
| ID: mdl-35002356
ABSTRACT
BACKGROUND:
Major histocompatibility complex (MHC) class-1 antigen is a glycoprotein expressed in all nucleated cells. The aim of this study was to assess MHC class-I expression in different neuromuscular diseases.METHODS:
The authors reviewed the data of 54 patients with neuromuscular diseases. Anti MHC class-I antibody was performed on the frozen muscle tissues using immunohistochemistry. MHC class-I was scored based on its expression on muscle fibers (0 normal, 1 expression <5 fibers, 2 expression in 5-10 fibers, 3 expression in >10 fibers). The pattern was only assessed in cases with MHC class-I scored 3 as (1 Sarcocapillary, 2 Sarcocapillary and necrotic fibers, 3 Perifascicular). The relationship between MHC class-I expression and neuromuscular diseases was statistically analyzed.RESULTS:
The mean age of the patients was 39.1 ± 18.5 years. Around 50% of patients showed normal CK levels and 5% of the cases showed elevated CK levels. There was a significance difference in MHC class-I expression between cases with normal and elevated CK levels when MHC class-I score was 3 (p= 0.020). There was a significant difference in MHC class-I expression among different neuromuscular diseases (p<0.001). All cases with idiopathic inflammatory myopathies (IIMs) have expressed MHC class-I in more than 10 fibers. MHC class-I was expressed in 15 cases of non-IIMs.CONCLUSION:
MHC class-I cannot be solely used as a biomarker to distinguish IIMs from non-IIMs. The presence of MHC class-I molecules in non-IIMs might be related to immunoproteasomes mechanism. Further studies, with different muscle proteins expression and genomic sequencing, must be conducted to understand the role of MHC Class-I in neuromuscular diseases.
Texto completo:
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Coleções:
01-internacional
Base de dados:
MEDLINE
Idioma:
En
Revista:
Degener Neurol Neuromuscul Dis
Ano de publicação:
2021
Tipo de documento:
Article