The role of molecular motors in peripheral nerve regeneration / Melissa Ducommun Priest.

Format:

Book

Manuscript

Thesis/Dissertation

Author/Creator:

Priest, Melissa Ducommun, author.

Contributor:

Granato, Michael, degree supervisor.

Holzbaur, Erika, degree committee member.

Luo, Wenqin, degree committee member.

Raper, Jonathan, degree committee member.

Scherer, Steven, degree committee member.

University of Pennsylvania. Department of Cell and Molecular Biology, degree granting institution.

Language:

English

Subjects (All):

Penn dissertations--Cell and molecular biology.

Cell and molecular biology--Penn dissertations.

Local Subjects:

Penn dissertations--Cell and molecular biology.

Cell and molecular biology--Penn dissertations.

Physical Description:

xiii, 89 leaves : illustrations ; 29 cm

Production:

[Philadelphia, Pennsylvania] : University of Pennsylvania, 2018.

Summary:

Following injury, axons of the peripheral nervous system have retained the capacity for regeneration. While it is well established that injury signals require molecular motors for their transport from the injury site to the nucleus, whether kinesin and dynein motors play additional roles in peripheral nerve regeneration is not well understood. Here we use genetic mutants of motor proteins in a zebrafish peripheral nerve regeneration model to visualize and define in vivo roles for kinesin and dynein. We find that both kinesin-1 and dynein are required for zebrafish peripheral nerve regeneration. While loss of kinesin-1 reduced the overall robustness of axonal regrowth, loss of dynein dramatically impaired axonal regeneration and also reduced injury-induced Schwann cell remodeling. Chimeras between wild type and dynein mutant embryos demonstrate that dynein function in neurons is sufficient to promote axonal regrowth. Finally, by simultaneously monitoring actin and microtubule dynamics in regenerating axons we find that dynein appears dispensable to initiate axonal regrowth, but is critical to stabilize microtubules, thereby sustaining axonal regeneration. These results reveal two previously unappreciated roles for dynein during peripheral nerve regeneration, initiating injury induced Schwann cell remodeling and stabilizing axonal microtubules to sustain axonal regrowth.

Notes:

Ph. D. University of Pennsylvania 2018.

Department: Cell and Molecular Biology.

Supervisor: Michael Granato.

Includes bibliographical references.

OCLC:

1334675846