Differential expression of nuclear lamin subtypes in the neural cells of the adult rat cerebral cortex
Yasuharu Takamori,
Yukie Hirahara,
Taketoshi Wakabayashi,
Tetsuji Mori,
Taro Koike,
Yosky Kataoka,
Yasuhisa Tamura,
Shuji Kurebayashi,
Kiyoshi Kurokawa,
Hisao Yamada
Affiliations
Yasuharu Takamori
Department of Anatomy and Cell Science, Kansai Medical University, Osaka, Japan
Yukie Hirahara
Department of Anatomy and Cell Science, Kansai Medical University, Osaka, Japan; Corresponding author at: Department of Anatomy and Cell Science, Kansai Medical University, 2-5-1, Shin-machi, Hirakata-City, Osaka, 573-1010, Japan.
Taketoshi Wakabayashi
Department of Anatomy and Cell Science, Kansai Medical University, Osaka, Japan
Tetsuji Mori
Department of Anatomy and Cell Science, Kansai Medical University, Osaka, Japan; Faculty of Medicine, Tottori University, Tottori, Japan
Taro Koike
Department of Anatomy and Cell Science, Kansai Medical University, Osaka, Japan
Yosky Kataoka
Laboratory for Cellular Function Imaging, RIKEN Center for Biosystems Dynamics Research, Kobe, Japan; Multi-Modal Microstructure Analysis Unit, RIKEN-JEOL Collaboration Center, Kobe, Japan
Yasuhisa Tamura
Laboratory for Cellular Function Imaging, RIKEN Center for Biosystems Dynamics Research, Kobe, Japan; Multi-Modal Microstructure Analysis Unit, RIKEN-JEOL Collaboration Center, Kobe, Japan
Shuji Kurebayashi
Department of Anatomy and Cell Science, Kansai Medical University, Osaka, Japan; Department of School Education Research, Shizuoka University, Shizuoka, Japan
Kiyoshi Kurokawa
Department of Anatomy and Cell Science, Kansai Medical University, Osaka, Japan; Department of Human Health Science, Osaka international University, Osaka, Japan
Hisao Yamada
Department of Anatomy and Cell Science, Kansai Medical University, Osaka, Japan
Lamins are type V intermediate filament proteins that are located beneath the inner nuclear membrane. In mammalian somatic cells, LMNB1 and LMNB2 encode somatic lamins B1 and B2, respectively, and the LMNA gene is alternatively spliced to generate somatic lamins A and C.Mutations in lamin genes have been linked to many human hereditary diseases, including neurodegenerative disorders. Knowledge about lamins in the nervous system has been accumulated recently, but a precise analysis of lamin subtypes in glial cells has not yet been reported. In this study we investigated the composition of lamin subtypes in neurons, astrocytes, oligodendrocyte-lineage cells, and microglia in the adult rat cerebral cortex using an immunohistochemical staining method. Lamin A was not observed in neurons and glial cells. Lamin C was observed in astrocytes, mature oligodendrocytes and neurons, but not observed in oligodendrocyte progenitor cells. Microglia also did not stain positive for lamin C which differed from macrophages, with lamin C positive. Lamin B1 and B2 were observed in all glial cells and neurons. Lamin B1 was intensely positive in oligodendrocyte progenitor cells compared with other glial cells and neurons. Lamin B2 was weakly positive in all glial cells compared to neurons. Our current study might provide useful information to reveal how the onset mechanisms of human neurodegenerative diseases are associated with mutations in genes for nuclear lamin proteins. Keywords: Lamins, Neurons, Glial cells, Adult rat, Cerebral cortex, Immunohistochemistry
