Transient expression of Bis protein in midline radial glia in developing rat brainstem and spinal cord.
Bis (Bcl-2 interacting death suppressor) has been reported to contribute to the differentiation and maturation of specific neuronal populations in the developing rat forebrain, in addition to its well-established functions as a stress or survival-related protein. In the present study, we have analyzed the expression of Bis in the rat brainstem and cervical spinal cord during development by using immunohistochemistry. Bis immunoreactivity was detected in radial glial cells flanking the midline from embryonic day 14. During embryonic and early postnatal development, Bis expression persisted in differentiating radial glia at the midline but disappeared first in the spinal cord by postnatal day 7 (P7) and later also in the brainstem by P14. Bis expression was restricted to a subpopulation of the midline radial glia, i.e., the dorsal midline of the midbrain and spinal cord and the ventral midline of the hindbrain, which were double- or triple-labeled with vimentin and nestin, markers for radial glia, and S100B. However, these markers also labeled all radial glia including the ventral midline glia in the midbrain and spinal cord, with Bis being absent from these structures. In addition, the dorsal midline glia in the midbrain and spinal cord expressed Bis prior to the timing of expression for radial glial markers. Therefore, our results demonstrate the early and transient expression of Bis in the subpopulation of midline glia in the developing brainstem and spinal cord, suggesting that Bis has a unique role in association with the radial glial cells in the developing central nervous system.
Choi
Jeong-Sun
JS
Department of Anatomy, College of Medicine, The Catholic University of Korea, 505 Banpo-dong, Socho-gu, 137-701, Seoul, Korea.
Lee
Jeong-Hwa
JH
Shin
Yoo-Jin
YJ
Lee
Ji-Yeon
JY
Yun
Hou
H
Chun
Myung-Hoon
MH
Lee
Mun-Yong
MY
D048868:Adaptor Proteins, Signal Transducing / Q000096:biosynthesis*; D000818:Animals; D051017:Apoptosis Regulatory Proteins / Q000096:biosynthesis*; D001933:Brain Stem / Q000166:cytology / Q000196:embryology* / Q000378:metabolism*; D005260:Female; D007150:Immunohistochemistry; D007381:Intermediate Filament Proteins / Q000096:biosynthesis; D009414:Nerve Growth Factors / Q000096:biosynthesis; D009419:Nerve Tissue Proteins / Q000096:biosynthesis; D064231:Nestin; D009457:Neuroglia / Q000378:metabolism*; D011247:Pregnancy; D051381:Rats; D017207:Rats, Sprague-Dawley; D064568:S100 Calcium Binding Protein beta Subunit; D009418:S100 Proteins / Q000096:biosynthesis; D013116:Spinal Cord / Q000166:cytology / Q000196:embryology* / Q000378:metabolism*; D013997:Time Factors; D014746:Vimentin / Q000096:biosynthesis
D048868:Adaptor Proteins, Signal Transducing; D051017:Apoptosis Regulatory Proteins; C498807:BAG3 protein, rat; D007381:Intermediate Filament Proteins; D009414:Nerve Growth Factors; D009419:Nerve Tissue Proteins; C577486:Nes protein, rat; D064231:Nestin; D064568:S100 Calcium Binding Protein beta Subunit; D009418:S100 Proteins; C579158:S100b protein, rat; D014746:Vimentin