Linked Life Data

20184954

Source:http://linkedlifedata.com/resource/pubmed/id/20184954

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
7
pubmed:dateCreated
2010-4-27
pubmed:abstractText
Hematopoietic-specific RhoGTPase RhoH displays an important role in regulating T-cell development, a process that is accompanied by ordered and directed migration of progenitors through thymus. While RhoGTPases are key regulators of cytokinesis, the precise role of RhoH in T-cell migration is unknown. Here, by using Jurkat cell migration as a model, we found that RhoH is required for cell migration in response to the high concentration of SDF1 alpha but displays inhibitory roles in regulating migration in the absence of SDF1 alpha or in the range of low concentrations. We further found that RhoH-mediated migration requires PAK1 but not ITK. Indeed, both the low and high concentrations of SDF1 alpha activate PAK1 but only the high concentration-induced activation of PAK1 requires RhoH. Further study of the RhoH-PAK interaction revealed that RhoH is able to bind and activate PAK1, indicating that RhoH plays a positive role in response to the high concentration of SDF1 alpha. In contrast, at rest, RhoH indirectly inhibits Slp76/ITK activity through its modulation on TCR signaling, supporting a negative regulatory role for RhoH when SDF1 alpha is insufficient to activate the RhoH-PAK1 pathway. Together, our study uncovered a dual role for RhoH in SDF1 alpha signaling in T-cell responses.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jul
pubmed:issn
1873-3913
pubmed:author
pubmed:copyrightInfo
(c) 2010. Published by Elsevier Inc.
pubmed:issnType
Electronic
pubmed:volume
22
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1022-32
pubmed:meshHeading
pubmed:year
2010
pubmed:articleTitle
RhoH plays distinct roles in T-cell migrations induced by different doses of SDF1 alpha.
pubmed:affiliation
Division of Hematology and Oncology, Beth Israel Deaconess Medical Center and Harvard Medical School, 330 Brookline Ave., Boston, MA 02215, USA. howang@rci.rutgers.edu
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't, Research Support, N.I.H., Extramural