Journal
BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS
Volume 393, Issue 3, Pages 481-486Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.bbrc.2010.02.029
Keywords
Human adipose-derived stem cells; GLT1; SOD1(G93A) mouse; Astrocyte; Amyotrophic lateral sclerosis
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Funding
- National Natural Science Fund of China [30370510, 30170337]
- Natural Science Fund of Guangdong Province [31693]
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Impaired glutamate uptake function of astrocytes associated with accumulation of extracellular glutamate is a well-documented feature of amyotrophic lateral sclerosis (ALS). Enhancing the uptake function of astrocytic glutamate transport 1 (GLT1) may be a potential treatment for this disease. Human adipose-derived stem cells (hADSCs) are capable of secreting a large number of cytokines which exhibit diverse pharmacological effects. Therefore, we investigate the influence of the soluble factors released by hADSCs on the GLT1 in primary astrocytes cultured from SOD1(G93A) mice, a widely studied mutant human SOD1 transgenic model of ALS. Our data indicate that soluble factors from hADSCs significantly upregulate the expression of GLT1 in SOD1(G93A)-bearing astrocytes, which result in enhanced glutamate uptake function. The upregulation of GLT1 is accompanied by the inhibition of caspase-3 activation in mutant astrocytes. In addition, we find that hADSCs cocultured with SOD1G93A-bearing astrocytes produce more VEGF, HGF and IGF-1, which are reported to have neuroprotective effects. Our results suggest that hADSCs may be a potential candidate in cellular therapy for ALS. (C) 2010 Elsevier Inc. All rights reserved.
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