Immunohistochemical analysis of Marinesco bodies, using antibodies against proteins implicated in the ubiquitin-proteasome system, autophagy and aggresome formation

• Published in: Neuropathology Vol. 32; no. 3; pp. 261 - 266
• Main Authors: Odagiri, Saori, Tanji, Kunikazu, Mori, Fumiaki, Kakita, Akiyoshi, Takahashi, Hitoshi, Kamitani, Tetsu, Wakabayashi, Koichi
• Format: Journal Article
• Language: English
• Published: Melbourne, Australia Blackwell Publishing Asia 01.06.2012
• Subjects: Aged; Aged, 80 and over; aggresome; aggresomes; Antibodies; autophagy; Autophagy - physiology; Disaggregation; Female; GABARAP protein; Humans; Image Processing, Computer-Assisted; Immunohistochemistry; Inclusion bodies; Inclusion Bodies - pathology; Leukocytes (eosinophilic); Male; Marinesco body; Mesencephalon; Middle Aged; Neurons; Phagocytosis; Proteasome Endopeptidase Complex - metabolism; proteasomes; Small Ubiquitin-Related Modifier Proteins - metabolism; Substantia nigra; Substantia Nigra - pathology; SUMO; Ubiquitin; Ubiquitin - metabolism; ubiquitin-proteasome system; ubiquitination
• ISSN: 0919-6544; 1440-1789; 1440-1789
• DOI: 10.1111/j.1440-1789.2011.01267.x

Marinesco bodies (MBs) are spherical eosinophilic intranuclear inclusions in pigmented neurons in the substantia nigra and locus ceruleus. Previous immunohistochemical studies have shown that MBs are positive for ubiquitin, p62 and SUMO‐1, suggesting the involvement of ubiquitination and related proteins in the formation or disaggregation of MBs. However, the involvement is not thoroughly understood. Therefore, we immunohistochemically examined the midbrain from five control subjects ranged from 53 to 84 years old. MBs were positive for various proteins implicated in the ubiquitin‐proteasome system (ubiquitin, p62, EDD1, NEDD8, NUB1, SUMO‐1 and SUMO‐2), aggresome formation (HDAC6) and autophagy (ubiquitin, p62, LC3, GABARAP and GATE‐16). These findings suggest that proteins related to ubiquitination, proteasomal degradation and autophagy are involved in the formation or disaggregation of MBs.