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- W2018792392 abstract "It has been demonstrated that conditioned medium from astrocytes challenged by in vitro ischemia (oxygen–glucose deprivation, OGD) improved neuronal survival. In addition, preconditioning stimuli can be cross-tolerant, safeguarding against other types of injury. We therefore hypothesized that hyperthermia-conditioned astrocyte-cultured medium (ACM) might also have protective effect on neurons against ischemic injury. The cultured-media, named 38ACM and 40ACM respectively, were collected after astrocytes had been incubated at 38 °C or 40 °C for 6 h, followed by incubation at 37 °C for 24 h. It was found that ischemia for 6 h induced a significant reduction in the number of neuronal cells and cell-viability, and an increase in lactate dehydrogenase (LDH) release and the percentage of apoptotic nuclei in neurons. Pre-treatment with 38ACM or 40ACM for 24 h significantly diminished ischemia injury, enhanced cell viability, reduced LDH release and reversed apoptosis. Western blot analysis showed that treatment with 38ACM or 40ACM for 24 h led to a significant increase in hypoxia-inducible factor-1 (HIF-1) alpha expression. The EMSA demonstrated that the ACM increased the binding activity of HIF-1 in ischemic neurons. The data implied that hyperthermia-conditioned ACM protects neurons from ischemic injury by up-regulating HIF-1 alpha, and the increased binding activity of HIF-1 and anti-apoptotic ability." @default.
- W2018792392 created "2016-06-24" @default.
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- W2018792392 date "2011-09-01" @default.
- W2018792392 modified "2023-09-24" @default.
- W2018792392 title "Hyperthermia conditioned astrocyte-cultured medium protects neurons from ischemic injury by the up-regulation of HIF-1 alpha and the increased anti-apoptotic ability" @default.
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- W2018792392 doi "https://doi.org/10.1016/j.ejphar.2011.05.018" @default.
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