Glucocorticoids increase excitotoxic injury and inflammation in the hippocampus of adult male rats.
Glucocorticoids increase excitotoxic injury and inflammation in the hippocampus of adult male rats.
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DOI:
10.1159/000367849
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发表时间:
2014
影响因子:
4.1
通讯作者:
Sapolsky RM
中科院分区:
文献类型:
--
作者:
Sorrells SF;Munhoz CD;Manley NC;Yen S;Sapolsky RM
Stress exacerbates neuron loss in many CNS injuries via the actions of adrenal glucocorticoid (GC) hormones. For some injuries, this GC-endangerment of neurons is accompanied by greater immune cell activation in the CNS, a surprising outcome given the potent immunosuppressive properties of GCs. To determine whether the effects of GCs on inflammation contribute to neuron death or result from it, we tested whether non-steroidal anti-inflammatory drugs could protect neurons from GCs during kainic acid excitotoxicity in adrenalectomized male rats. We next measured GC effects on (i) chemokine production (CCL2, CINC-1), (ii) signals that suppress immune activation (CX3CL1, CD22, CD200, and TGF-b), and (iii) NF-kB activity. Concurrent treatment with minocycline but not indomethacin prevented GC-endangerment. GCs did not substantially affect CCL2, CINC-1, or baseline NF-kB activity, but they did suppress CX3CL1, CX3CR1, and CD22 expression in the hippocampus, factors that normally restrain inflammatory responses. These findings demonstrate that cellular inflammation is not necessarily suppressed by GCs in the injured hippocampus; instead, GCs may worsen hippocampal neuron death, at least in part, by increasing the neurotoxicity of CNS inflammation.
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影响因子:
56.9
作者:
Nimmerjahn, A;Kirchhoff, F;Helmchen, F
通讯作者:
Helmchen, F
影响因子:
14.5
作者:
Cho, Ik-Hyun;Hong, Jinpyo;Lee, Sung Joong
通讯作者:
Lee, Sung Joong
DOI:
10.1073/pnas.94.5.2007
发表时间:
1997-03-04
影响因子:
11.1
作者:
Hara, H;Friedlander, RM;Moskowitz, MA
通讯作者:
Moskowitz, MA
DOI:
10.1073/pnas.95.18.10896
发表时间:
1998-09-01
影响因子:
11.1
作者:
Harrison, JK;Jiang, Y;Feng, LL
通讯作者:
Feng, LL
影响因子:
6.2
作者:
Mott, RT;Ait-Ghezala, G;Tan, J
通讯作者:
Tan, J