Distribution of the Immunoreactivity for Glycoprotein M6B in the Neurogenic Niche and Reactive Glia in the Injury Penumbra Following Traumatic Brain Injury in Mice.
The location and morphology of astrocytes are known to contribute to their diversity, and this diversity is often associated with their selective functions. However, molecular markers for astrocyte subtypes are largely unknown. In this study, we found that the immunoreactivity for glycoprotein GPM6B (M6B-IR) is preferentially expressed in the astrocytes associated with ventricles or neurogenic regions of the adult mouse brain. In particular, M6B-IR in the neurogenic niche was confined to glial fibrillary acidic protein- or nestin-expressing neural stem cells. Furthermore, in the injury penumbra, reactive astrocytes expressing nestin also exhibited strong M6B-IR. These results reveal that GPM6B is a potential molecular marker for a subset of astrocytes, as well as for the injury-dependent activation of astrocytes.
Department of Anatomy, Korea University College of Medicine, Seoul 136-705, Korea.
Kyung Mee
KM
Choi
Department of Anatomy, Korea University College of Medicine, Seoul 136-705, Korea.
Joo Yeon
JY
Kim
Department of Emergency Medical Technology, College of Nursing and Public Health, Kyungil University, Gyeongsan 721-701, Korea.
Younghwa
Y
Kim
M6B; astrocytes; injury; nestin; neurogenesis; stem cells