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Gu, Zirong; Kalamboglas, John; Yoshioka, Shin; Han, Wenqi; Li, Zhuo; Kawasawa, Yuka Imamura; Pochareddy, Sirisha; Li, Zhen; Liu, Fuchen; Xu, Xuming; Wijeratne, Sagara; Ueno, Masaki; Blatz, Emily; Salomone, Joseph; Kumanogoh, Atsushi; Rasin, Mladen-Roko; Gebelein, Brian; Weirauch, Matthew T.; Sestan, Nenad; Martin, John H.; Yoshida, Yutaka
Science (American Association for the Advancement of Science), 07/2017, Letnik: 357, Številka: 6349Journal Article
Superior manual dexterity in higher primates emerged together with the appearance of cortico-motoneuronal (CM) connections during the evolution of the mammalian corticospinal (CS) system. Previously thought to be specific to higher primates, we identified transient CM connections in early postnatal mice, which are eventually eliminated by Sema6D-PlexA1 signaling. PlexA1 mutant mice maintain CM connections into adulthood and exhibit superior manual dexterity as compared with that of controls. Last, differing PlexA1 expression in layer 5 of the motor cortex, which is strong in wild-type mice but weak in humans, may be explained by FEZF2-mediated cis-regulatory elements that are found only in higher primates. Thus, species-dependent regulation of PlexA1 expression may have been crucial in the evolution of mammalian CS systems that improved fine motor control in higher primates.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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in: SICRIS
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