PMID- 15633455 OWN - NLM STAT- MEDLINE DCOM- 20050125 LR - 20160512 IS - 1447-6959 (Print) IS - 1447-073X (Linking) VI - 79 IP - 4 DP - 2004 Dec TI - Regulating filopodial dynamics through actin-depolymerizing factor/cofilin. PG - 173-83 AB - The regulation of filopodial dynamics by neurotrophins and other guidance cues plays an integral role in growth cone pathfinding. Filopodia are F-actin-based structures that explore the local environment, generate forces and play a role in growth cone translocation. Here, we review recent research showing that the actin-depolymerizing factor (ADF)/cofilin family of proteins mediates changes in the length and number of growth cone filopodia in response to brain-derived neurotrophic factor (BDNF). Although inhibition of myosin contractility also causes filopodial elongation, the elongation in response to BDNF does not occur through a myosin-dependent pathway. Active ADF/cofilin increases the rate of cycling between the monomer and polymer pools and is critical for the BDNF-induced changes. Thus, we discuss potential mechanisms by which ADF/cofilin may affect filopodial initiation and length change via its effects on F-actin dynamics in light of past research on actin and myosin function in growth cones. FAU - Fass, Joseph AU - Fass J AD - Department of Biochemistry and Molecular Biology, Colorado State University, Fort Collins, Colorado 80523-1870, USA. FAU - Gehler, Scott AU - Gehler S FAU - Sarmiere, Patrick AU - Sarmiere P FAU - Letourneau, Paul AU - Letourneau P FAU - Bamburg, James R AU - Bamburg JR LA - eng GR - GM35126/GM/NIGMS NIH HHS/United States GR - HD19950/HD/NICHD NIH HHS/United States GR - NS40371/NS/NINDS NIH HHS/United States GR - NS43115/NS/NINDS NIH HHS/United States PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Research Support, U.S. Gov't, Non-P.H.S. PT - Research Support, U.S. Gov't, P.H.S. PT - Review PL - Japan TA - Anat Sci Int JT - Anatomical science international JID - 101154140 RN - 0 (Actin Depolymerizing Factors) RN - 0 (DSTN protein, human) RN - 0 (Destrin) RN - 0 (Dstn protein, mouse) RN - 0 (Microfilament Proteins) RN - 0 (Nerve Tissue Proteins) SB - IM MH - Actin Depolymerizing Factors MH - Animals MH - Cell Line, Tumor MH - Destrin MH - Growth Cones/*metabolism/ultrastructure MH - Humans MH - Mice MH - Microfilament Proteins/*metabolism/ultrastructure MH - Nerve Tissue Proteins/*metabolism/ultrastructure RF - 84 EDAT- 2005/01/07 09:00 MHDA- 2005/01/26 09:00 CRDT- 2005/01/07 09:00 PHST- 2005/01/07 09:00 [pubmed] PHST- 2005/01/26 09:00 [medline] PHST- 2005/01/07 09:00 [entrez] AID - 10.1111/j.1447-073x.2004.00087.x [doi] PST - ppublish SO - Anat Sci Int. 2004 Dec;79(4):173-83. doi: 10.1111/j.1447-073x.2004.00087.x.