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Remarkable complexity and variability of corticospinal tract defects in adult Semaphorin 6A knockout mice
http://hdl.handle.net/2241/00157166
http://hdl.handle.net/2241/001571662c47e4e6-e99d-4ba3-bc5e-d03d6c6ef8c1
名前 / ファイル | ライセンス | アクション |
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BR_1710 (2.3 MB)
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Item type | Journal Article(1) | |||||
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公開日 | 2019-07-22 | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | Remarkable complexity and variability of corticospinal tract defects in adult Semaphorin 6A knockout mice | |||||
言語 | ||||||
言語 | eng | |||||
資源タイプ | ||||||
資源 | http://purl.org/coar/resource_type/c_6501 | |||||
タイプ | journal article | |||||
著者 |
桝, 正幸
× 桝, 正幸× 岡田, 拓也× 桝, 和子× Suto, Fumikazu× Mitchell, Kevin J. |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | The corticospinal tract (CST) has a complex and long trajectory that originates in the cerebral cortex and ends in the spinal cord. Semaphorin 6A (Sema6A), a member of the semaphorin family, is an important regulator of CST axon guidance. Previous studies have shown that postnatal Sema6A mutant mice have CST defects at the midbrain–hindbrain boundary and medulla. However, the routes the aberrant fibers take throughout the Sema6A mutant brain remain unknown. In this study, we performed 3D reconstruction of immunostained CST fibers to reevaluate the details of the abnormal CST trajectories in the brains of adult Sema6A mutant mice. Our results showed that the axon guidance defects reported in early postnatal mutants were consistently observed in adulthood. Those abnormal trajectories revealed by 3D analysis of brain sections were, however, more complex and variable than previously thought. In addition, 3D analysis allowed us to identify a few new patterns of aberrant projections. First, a subset of fibers that separated from and descended in parallel to the main bundle projected laterally at the caudal pons, subsequently changed direction by turning caudally, and extended to the medulla. Second, some abnormal fibers returned to the correct trajectory after deviating substantially from the original tract. Third, some fibers reached the pyramidal decussation normally but did not enter the dorsal funiculus. Section immunostaining combined with 3D reconstruction is a powerful method to track long projection fibers and to examine the entire nerve tracts of both normal and abnormal animals. | |||||
書誌情報 |
en : Brain Research 巻 1710, p. 209-219, 発行日 2019-05 |
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ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 00068993 | |||||
書誌レコードID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA10800122 | |||||
PubMed番号 | ||||||
識別子タイプ | PMID | |||||
関連識別子 | 30599138 | |||||
DOI | ||||||
識別子タイプ | DOI | |||||
関連識別子 | 10.1016/j.brainres.2018.12.041 | |||||
権利 | ||||||
権利情報 | © 2019. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/ | |||||
著者版フラグ | ||||||
値 | author | |||||
出版者 | ||||||
出版者 | Elsevier |