Abstract：
:Decreases in energy metabolism following traumatic brain injury (TBI) are attributed to impairment of glycolytic flux and oxidative phosphorylation. Glucose utilization post-TBI is decreased while administration of alternative substrates has been shown to be neuroprotective. Changes in energy metabolism following TBI happens in two phases; a period of hyper-metabolism followed by prolonged hypo-metabolism. It is not understood how different cerebral metabolic states may impact substrate metabolism and ultimately mitochondrial function. Adult male or female Sprague Dawley rats were given sham surgery or controlled cortical impact (CCI) and were assigned one of two administration schemes. Glucose, lactate or beta-hydroxybutyrate (BHB) were infused i.v. either starting immediately after injury or beginning 6 h post-injury for 3 h to reflect the hyper- and hypo-metabolic stages. Animals were euthanized 24 h post-injury. The peri-contusional cortex was collected and assayed for mitochondrial respiration peroxide production, and citrate synthase activity. Tissue acetyl-CoA, ATP, glycogen and HMGB1 were also quantified. Sex differences were observed in injury pattern. Administration based on cerebral metabolic state identified that only early lactate and late BHB improved mitochondrial function and peroxide production and TCA cycle intermediates in males. In contrast, both early and late BHB had deleterious effects on all aspects of metabolic measurements in females. These data stress there is no one optimal alternative substrate, but rather the fuel type used should be guided by both cerebral metabolic state and sex.
journal_name
Exp Neuroljournal_title
Experimental neurologyauthors
Greco T,Vespa PM,Prins MLdoi
10.1016/j.expneurol.2020.113289subject
Has Abstractpub_date
2020-07-01 00:00:00pages
113289eissn
0014-4886issn
1090-2430pii
S0014-4886(20)30120-5journal_volume
329pub_type
杂志文章abstract：:Silent strokes occur more frequently than classic strokes; however, symptoms may go unreported in spite of lasting tissue damage. A silent stroke may indicate elevated susceptibility to recurrent stroke, which may eventually result in apparent and lasting impairments. Here we investigated if multiple silent strokes to...
journal_title：Experimental neurology
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journal_title：Experimental neurology
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journal_title：Experimental neurology
pub_type： 杂志文章
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journal_title：Experimental neurology
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journal_title：Experimental neurology
pub_type： 杂志文章,评审
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journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1006/exnr.1997.6711
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journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1016/j.expneurol.2005.02.020
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journal_title：Experimental neurology
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journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1016/0014-4886(92)90133-b
更新日期：1992-09-01 00:00:00
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pub_type： 杂志文章
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journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1016/j.expneurol.2014.02.020
更新日期：2014-05-01 00:00:00
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journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1016/0014-4886(90)90034-p
更新日期：1990-11-01 00:00:00
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journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1016/j.expneurol.2020.113483
更新日期：2021-01-01 00:00:00
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journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1016/0014-4886(87)90098-7
更新日期：1987-08-01 00:00:00
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journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1016/j.expneurol.2017.03.019
更新日期：2017-07-01 00:00:00
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journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1006/exnr.2001.7684
更新日期：2001-07-01 00:00:00
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journal_title：Experimental neurology
pub_type： 杂志文章
doi：10.1016/j.expneurol.2014.09.008
更新日期：2015-01-01 00:00:00
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journal_title：Experimental neurology
pub_type： 杂志文章
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journal_title：Experimental neurology
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journal_title：Experimental neurology
pub_type： 杂志文章
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journal_title：Experimental neurology
pub_type： 杂志文章
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journal_title：Experimental neurology
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doi：10.1016/0014-4886(87)90244-5
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journal_title：Experimental neurology
pub_type： 杂志文章
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journal_title：Experimental neurology
pub_type： 杂志文章
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更新日期：2016-07-01 00:00:00
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journal_title：Experimental neurology
pub_type： 杂志文章
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journal_title：Experimental neurology
pub_type： 临床试验,杂志文章
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更新日期：2005-12-01 00:00:00
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journal_title：Experimental neurology
pub_type： 杂志文章,评审
doi：10.1016/j.expneurol.2007.08.012
更新日期：2008-01-01 00:00:00
