title: Differential expression of nuclear lamin, the major component of nuclear lamina, during neurogenesis in two germinal regions of adult rat brain.
abstract: Lamins are major structural proteins of the nuclear envelope. Three lamin subtypes, A/C, B1 and B2, predominate in mammalian somatic cells. While the expression levels of lamins in several tissues are known to change during cell differentiation, lamin expression is poorly understood in the nervous system. To investigate the expression of lamins during neuronal differentiation in the mammalian adult brain, we performed immunohistochemical studies on lamins A/C, B1 and B2 in two neurogenic regions of rat brain: the subgranular zone of the dentate gyrus and the subventricular zone of the lateral ventricle. In particular, three types of cells were analysed using confocal microscopy: GFAP-positive cells as primary progenitor (stem) cells, PSA-NCAM-positive cells as subsequent neuronal progenitor cells, and NeuN-positive mature neurons. GFAP-positive cells possesed lamin A/C (++), B1 (++) and B2 (++), PSA-NCAM-positive cells possessed lamin A/C (-), B1 (+++) and B2 (+), and mature neurons possessed lamin A/C (++), B1 (+) and B2 (+++), in both neurogenic regions. These observations showed that the compositions of expressing lamin subtypes are distinct in particular differentiation stages during neurogenesis in the adult rat brain. Our results suggest that the alteration of nuclear lamina structure is coupled with the progression of neuronal differentiation.
authors: Department of Anatomy and Cell Science, Kansai Medical University, Moriguchi, Osaka, Japan.
authors: Yasuharu
authors: Y
authors: Takamori
authors: Yasuhisa
authors: Y
authors: Tamura
authors: Yosky
authors: Y
authors: Kataoka
authors: Yilong
authors: Y
authors: Cui
authors: Saori
authors: S
authors: Seo
authors: Takenori
authors: T
authors: Kanazawa
authors: Kiyoshi
authors: K
authors: Kurokawa
authors: Hisao
authors: H
authors: Yamada
mesh_terms: D000818:Animals; D002454:Cell Differentiation / Q000502:physiology*; D002552:Cerebral Ventricles / Q000166:cytology*; D005260:Female; D005786:Gene Expression Regulation / Q000502:physiology*; D005904:Glial Fibrillary Acidic Protein / Q000378:metabolism; D034904:Lamin Type A / Q000378:metabolism; D034921:Lamin Type B / Q000378:metabolism; D008297:Male; D009419:Nerve Tissue Proteins / Q000378:metabolism; D009474:Neurons / Q000378:metabolism*; D034881:Nuclear Lamina / Q000145:classification / Q000378:metabolism*; D038081:Organogenesis / Q000502:physiology; D051381:Rats; D017207:Rats, Sprague-Dawley; D013234:Stem Cells / Q000502:physiology*
chemical_list: D005904:Glial Fibrillary Acidic Protein; D034904:Lamin Type A; D034921:Lamin Type B; D009419:Nerve Tissue Proteins