PAK kinase regulates Rac GTPase and is a potential target in human schwannomas.
PAK kinase regulates Rac GTPase and is a potential target in human schwannomas.
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DOI:
10.1016/j.expneurol.2009.04.019
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发表时间:
2009-07
影响因子:
5.3
通讯作者:
Hanemann, Clemens O.
中科院分区:
文献类型:
--
作者:
Flaiz, Christine;Chernoff, Jonathan;Ammoun, Sylwia;Peterson, Jeffrey R.;Hanemann, Clemens O.
Merlin loss causes benign tumours of the nervous system, mainly schwannomas and meningiomas. Schwannomas show enhanced Rac1 and Cdc42 activity, The p21-activated kinase 2 (PAK2) activation and increased ruffling and cell adhesion. PAK regulates activation of merlin. PAK has been proposed as a potential therapeutic target in schwannomas. However where PAK stands in the Rac pathway is insufficiently characterised. We used a novel small molecule PAK inhibitor, IPA-3, to investigate the role of PAK activation on Rac1/Cdc42 activity, cell spreading and adhesion in human primary schwannoma and Schwann cells. We show that IPA-3 blocks activation of PAK2 at Ser192/197 that antagonises PAKs interaction with Pix. Accordingly, Pix-mediated Rac1 activation is decreased in IPA-3 treated schwannoma cells, indicating that PAK acts upstream of Rac. We show that this Rac activation at the level of focal adhesions in schwannoma cells is essential for cell spreading and adhesion in Schwann and schwannoma cells.
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DOI:
10.1097/nen.0b013e318093e555
发表时间:
2007-07-01
影响因子:
3.2
作者:
Flaiz, Christine;Kaempchen, Katherine;Hanemann, Clemens Oliver
通讯作者:
Hanemann, Clemens Oliver
影响因子:
6.4
作者:
Flaiz, Christine;Ammoun, Sylwia;Hanemann, C. Oliver
通讯作者:
Hanemann, C. Oliver
影响因子:
11.8
作者:
Shaw, RJ;Paez, JG;McClatchey, AI
通讯作者:
McClatchey, AI
影响因子:
8
作者:
Thaxton, C.;Lopera, J.;Fernandez-Valle, C.
通讯作者:
Fernandez-Valle, C.
影响因子:
64.8
作者:
MANSER, E;LEUNG, T;LIM, L
通讯作者:
LIM, L