Depletion of glutathione attenuates response of bone marrow stem cells to stromal cell-derived factor -1 [2007](IR93)

Depletion (耗盡) of glutathione (穀胱甘肽) attenuates (減弱) response (反應) of bone marrow stem cells (骨髓幹細胞) to stromal cell (基質細胞)-derived factor -1 [2007](IR93)

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(Memo Item created on December 25, 2010 11:26 PM)
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Depletion of glutathione attenuates response of bone marrow stem cells to stromal cell-derived factor -1

http://www.fasebj.org/cgi/content/meeting_abstract/21/6/A737-b
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FASEB J.
April 2007
21 (Meeting Abstract Supplement) A737

(The FASEB Journal. 2007;21:702.12)
© 2007 FASEB
702.12
Depletion of glutathione attenuates response of bone marrow stem cells to stromal cell-derived factor -1
Smita Swaminathan Iyer1, Jianguo Xu2, Dean P Jones2, Kenneth Brigham2 and Mauricio Rojas2
1 Nutrition and Health Sciences Program, Emory University, 615,Michael Street, 215 Whitehead Bldg, Emory University, Atlanta, GA, 30322,
2 Division of Pulmonary Allergy and Critical Care Medicine, Department of Medicine, Emory University, 615,Michael Street, 205,Whitehead Bldg, Emory University, Atlanta, GA, 30322

ABSTRACT

In adult organisms, stem cells, found primarily in the bone marrow and in low numbers in other organs, are mobilized to (被調動到) the injured tissue (受傷的組織) where they participate (參與) in the repair process (修復的過程). Stromal cell-derived factor -1a (SDF-1a) is critical for stem cell trafficking (幹細胞之輸送) during injury (損傷, 受傷). Very little is known about how nutrition affects this process. Our objectives were to determine how Glutathione (GSH) depletion, observed with aging and in numerous chronic disease states, affects the functional response of bone marrow cells to SDF-1a.

Bone marrow stem cells (BMSC) from 8 week old C57BL/6J mice were isolated, and were cultured for 24 hours in buthionine sulfoximine (BSO), an inhibitor of GSH synthesis. SDF-1a (120 ng/ml) dependent chemotaxis was determined in viable cells, over 3 hours, using a modified Boyden chamber method. We found a 5 fold decline in migration, in cells depleted of GSH compared to control.

Our data show that GSH is important in the directional migration of BMSC to SDF-1a and indicate that signal transduction pathways initiated by SDF-1a may be redox sensitive. Therefore, in states of chronic oxidative imbalance, stem cell response to SDF-1a may be attenuated slowing tissue regeneration and repair. As nutrition can impact levels of GSH, dietary control of antioxidant status may provide an opportunity to enhance repair and improve recovery in patients with injury.

Classifications
Cellular Mechanisms of Nutritional Modulation in Immunity
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