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- W3008484815 abstract "Late treatment with tissue plasminogen activator (tPA) leads to reperfusion injury and poor outcome in ischemic stroke. We have recently shown the beneficial effects of local brain hypothermia after late thrombolysis. Herein, we investigated whether transient whole-body hypothermia was neuroprotective and could prevent the side effects of late tPA therapy at 5.5 h after embolic stroke. After induction of stroke, male rats were randomly assigned into four groups: Control, Hypothermia, tPA and Hypothermia+tPA. Hypothermia started at 5 h after embolic stroke and continued for 1 h. Thirty min after hypothermia, tPA was administrated. Infarct volume, brain edema, blood-brain barrier (BBB) and matrix metalloproteinase-9 (MMP-9) were assessed 48 h and neurological functions were assessed 24 and 48 hour post-stroke. Compared with the control or tPA groups, whole-body hypothermia decreased infarct volume (P < 0.01), BBB disruption (P < 0.05) and MMP-9 level (P < 0.05). However, compared with hypothermia alone a combination of hypothermia and tPA was more effective in reducing infarct volume. While hypothermia alone did not show any effect, its combination with tPA reduced brain edema (P < 0.05). Hypothermia alone or when combined with tPA decreased MMP-9 compared with control or tPA groups (P < 0.01). Although delayed tPA therapy exacerbated BBB integrity, general cooling hampered its leakage after late thrombolysis (P < 0.05). Moreover, only combination therapy significantly improved sensorimotor function as well as forelimb muscle strength at 24 or 48 h after stroke (P < 0.01). Transient whole-body hypothermia in combination with delayed thrombolysis therapy shows more neuroprotection and extends therapeutic time window of tPA up to 5.5 h." @default.
- W3008484815 created "2020-03-06" @default.
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- W3008484815 date "2020-09-01" @default.
- W3008484815 modified "2023-09-26" @default.
- W3008484815 title "Whole body hypothermia extends tissue plasminogen activator treatment window in the rat model of embolic stroke" @default.
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- W3008484815 doi "https://doi.org/10.1016/j.lfs.2020.117450" @default.
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