Influence of a brief episode of anesthesia during the induction of experimental brain trauma on secondary brain damage and inflammation.

It is unclear whether a single, brief, 15-minute episode of background anesthesia already modulates delayed secondary processes after experimental brain injury. Therefore, this study was designed to characterize three anesthesia protocols for their effect on molecular and histological study endpoint...

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Autores principales:	Clara Luh, Katharina Gierth, Ralph Timaru-Kast, Kristin Engelhard, Christian Werner, Serge C Thal
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2011
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/019075fa757f42d2b4495cef40b63dd0
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spelling	oai:doaj.org-article:019075fa757f42d2b4495cef40b63dd02021-11-18T06:53:43ZInfluence of a brief episode of anesthesia during the induction of experimental brain trauma on secondary brain damage and inflammation.1932-620310.1371/journal.pone.0019948https://doaj.org/article/019075fa757f42d2b4495cef40b63dd02011-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/21625505/?tool=EBIhttps://doaj.org/toc/1932-6203It is unclear whether a single, brief, 15-minute episode of background anesthesia already modulates delayed secondary processes after experimental brain injury. Therefore, this study was designed to characterize three anesthesia protocols for their effect on molecular and histological study endpoints. Mice were randomly separated into groups that received sevoflurane (sevo), isoflurane (iso) or an intraperitoneal anesthetic combination (midazolam, fentanyl and medetomidine; comb) prior to traumatic brain injury (controlled cortical impact, CCI; 8 m/s, 1 mm impact depth, 3 mm diameter). Twenty-four hours after insult, histological brain damage, neurological function (via neurological severity score), cerebral inflammation (via real-time RT-PCR for IL6, COX-2, iNOS) and microglia (via immunohistochemical staining for Iba1) were determined. Fifteen minutes after CCI, the brain contusion volume did not differ between the anesthetic regimens (sevo = 17.9±5.5 mm(3); iso = 20.5±3.7 mm(3); comb = 19.5±4.6 mm(3)). Within 24 hours after injury, lesion size increased in all groups (sevo = 45.3±9.0 mm(3); iso = 31.5±4.0 mm(3); comb = 44.2±6.2 mm(3)). Sevo and comb anesthesia resulted in a significantly larger contusion compared to iso, which was in line with the significantly better neurological function with iso (sevo = 4.6±1.3 pts.; iso = 3.9±0.8 pts.; comb = 5.1±1.6 pts.). The expression of inflammatory marker genes was not significantly different at 15 minutes and 24 hours after CCI. In contrast, significantly more Iba1-positive cells were present in the pericontusional region after sevo compared to comb anesthesia (sevo = 181±48/mm(3); iso = 150±36/mm(3); comb = 113±40/mm(3)). A brief episode of anesthesia, which is sufficient for surgical preparations of mice for procedures such as delivering traumatic brain injury, already has a significant impact on the extent of secondary brain damage.Clara LuhKatharina GierthRalph Timaru-KastKristin EngelhardChristian WernerSerge C ThalPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 6, Iss 5, p e19948 (2011)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Clara Luh Katharina Gierth Ralph Timaru-Kast Kristin Engelhard Christian Werner Serge C Thal Influence of a brief episode of anesthesia during the induction of experimental brain trauma on secondary brain damage and inflammation.
description	It is unclear whether a single, brief, 15-minute episode of background anesthesia already modulates delayed secondary processes after experimental brain injury. Therefore, this study was designed to characterize three anesthesia protocols for their effect on molecular and histological study endpoints. Mice were randomly separated into groups that received sevoflurane (sevo), isoflurane (iso) or an intraperitoneal anesthetic combination (midazolam, fentanyl and medetomidine; comb) prior to traumatic brain injury (controlled cortical impact, CCI; 8 m/s, 1 mm impact depth, 3 mm diameter). Twenty-four hours after insult, histological brain damage, neurological function (via neurological severity score), cerebral inflammation (via real-time RT-PCR for IL6, COX-2, iNOS) and microglia (via immunohistochemical staining for Iba1) were determined. Fifteen minutes after CCI, the brain contusion volume did not differ between the anesthetic regimens (sevo = 17.9±5.5 mm(3); iso = 20.5±3.7 mm(3); comb = 19.5±4.6 mm(3)). Within 24 hours after injury, lesion size increased in all groups (sevo = 45.3±9.0 mm(3); iso = 31.5±4.0 mm(3); comb = 44.2±6.2 mm(3)). Sevo and comb anesthesia resulted in a significantly larger contusion compared to iso, which was in line with the significantly better neurological function with iso (sevo = 4.6±1.3 pts.; iso = 3.9±0.8 pts.; comb = 5.1±1.6 pts.). The expression of inflammatory marker genes was not significantly different at 15 minutes and 24 hours after CCI. In contrast, significantly more Iba1-positive cells were present in the pericontusional region after sevo compared to comb anesthesia (sevo = 181±48/mm(3); iso = 150±36/mm(3); comb = 113±40/mm(3)). A brief episode of anesthesia, which is sufficient for surgical preparations of mice for procedures such as delivering traumatic brain injury, already has a significant impact on the extent of secondary brain damage.
format	article
author	Clara Luh Katharina Gierth Ralph Timaru-Kast Kristin Engelhard Christian Werner Serge C Thal
author_facet	Clara Luh Katharina Gierth Ralph Timaru-Kast Kristin Engelhard Christian Werner Serge C Thal
author_sort	Clara Luh
title	Influence of a brief episode of anesthesia during the induction of experimental brain trauma on secondary brain damage and inflammation.
title_short	Influence of a brief episode of anesthesia during the induction of experimental brain trauma on secondary brain damage and inflammation.
title_full	Influence of a brief episode of anesthesia during the induction of experimental brain trauma on secondary brain damage and inflammation.
title_fullStr	Influence of a brief episode of anesthesia during the induction of experimental brain trauma on secondary brain damage and inflammation.
title_full_unstemmed	Influence of a brief episode of anesthesia during the induction of experimental brain trauma on secondary brain damage and inflammation.
title_sort	influence of a brief episode of anesthesia during the induction of experimental brain trauma on secondary brain damage and inflammation.
publisher	Public Library of Science (PLoS)
publishDate	2011
url	https://doaj.org/article/019075fa757f42d2b4495cef40b63dd0
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Influence of a brief episode of anesthesia during the induction of experimental brain trauma on secondary brain damage and inflammation.

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