Abstract:
BACKGROUND:Therapeutic hypothermia (HT) is the only intervention that improves outcomes in neonatal hypoxic-ischemic encephalopathy (HIE). However, the multifactorial mechanisms by which HT impacts HIE are incompletely understood. The complement system plays a major role in the pathogenesis of ischemia-reperfusion injuries such as HIE. We have previously demonstrated that HT modulates complement activity in vitro. METHODS:Term equivalent rat pups were subjected to unilateral carotid ligation followed by hypoxia (8% O2) for 45 min to simulate HIE. A subset of animals was subjected to HT (31-32°C for 6 h). Plasma and brain levels of C3a and C5a were measured. Receptors for C3a (C3aR) and C5a (C5aR) along with C1q, C3, and C9 were characterized in neurons, astrocytes, and microglia. RESULTS:We found that HT increased systemic expression of C3a and decreased expression of C5a after HIE. In the brain, C3aR and C5aR are predominantly expressed on microglia after HIE. HT increased local expression of C3aR and decreased expression on C5aR after HIE. Furthermore, HT decreased local expression of C1q, C3-products, and C9 in the brain. CONCLUSION:HT is associated with significant alteration of complement effectors and their cognate receptors. Complement modulation may improve outcomes in neonatal HIE.
journal_name
Pediatr Resjournal_title
Pediatric researchauthors
Shah TA,Nejad JE,Pallera HK,Lattanzio FA,Farhat R,Kumar PS,Hair PS,Bass WT,Krishna NKdoi
10.1038/pr.2016.271subject
Has Abstractpub_date
2017-04-01 00:00:00pages
654-662issue
4eissn
0031-3998issn
1530-0447pii
pr2016271journal_volume
81pub_type
杂志文章abstract::The response of cerebral blood volume (CBVR) to a small induced change in arterial carbon dioxide tension was studied by near-infrared spectroscopy in 17 newborn infants born from 26 wk of gestation to term. All 17 infants were undergoing mechanical ventilation but had apparently normal brains. The CBVR per kPa change...
journal_title:Pediatric research
pub_type: 杂志文章
doi:10.1203/00006450-199106010-00007
更新日期:1991-06-01 00:00:00
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pub_type: 杂志文章
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更新日期:2003-09-01 00:00:00
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journal_title:Pediatric research
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pub_type: 杂志文章,评审
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更新日期:2018-10-01 00:00:00
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更新日期:1987-11-01 00:00:00
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pub_type: 杂志文章,随机对照试验
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更新日期:2017-08-01 00:00:00
abstract::A comparative study of two smallpox vaccines, standard calf lymph vaccine, and an attenuated vaccine, CVI-78, was performed in 95 children. Primary vaccination with CVI-78 resulted in a more attenuated response than primary vaccination with standard vaccine. Sixty-one percent of those vaccinated with CVI-78 and 96 per...
journal_title:Pediatric research
pub_type: 杂志文章
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更新日期:1975-08-01 00:00:00
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journal_title:Pediatric research
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更新日期:1996-02-01 00:00:00
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更新日期:1993-02-01 00:00:00
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journal_title:Pediatric research
pub_type: 杂志文章
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更新日期:1980-03-01 00:00:00
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pub_type: 杂志文章,撤回出版物
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更新日期:2019-11-01 00:00:00
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journal_title:Pediatric research
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更新日期:1996-04-01 00:00:00
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pub_type: 杂志文章,评审
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更新日期:2020-04-21 00:00:00
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doi:10.1203/00006450-197606000-00007
更新日期:1976-06-01 00:00:00
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doi:10.1203/00006450-199107000-00016
更新日期:1991-07-01 00:00:00
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pub_type: 杂志文章
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更新日期:2010-09-01 00:00:00
abstract::Extracellular glutathione peroxidase (E-GPx) is a selenoenzyme that reduces hydrogen peroxide and organic peroxides. All plasma glutathione peroxidase (GPx) activity in humans is attributable to E-GPx. The gastrointestinal (GI) tract also synthesizes and secretes E-GPx into the extracellular milieu. Endogenously gener...
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更新日期:2002-05-01 00:00:00
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journal_title:Pediatric research
pub_type: 临床试验,杂志文章
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更新日期:2006-03-01 00:00:00
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pub_type: 杂志文章
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更新日期:2017-08-01 00:00:00
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更新日期:2005-05-01 00:00:00
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doi:10.1203/00006450-198410000-00013
更新日期:1984-10-01 00:00:00
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pub_type: 杂志文章,评审
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更新日期:2003-10-01 00:00:00
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更新日期:1990-01-01 00:00:00
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abstract::To determine the influence of an altered carotid body function on the laryngeal chemoreflex (LCR) response, reflex apnea was induced by laryngeal water stimulation during normoxia or acute hypoxia in unanesthetized awake lambs in which the ventilatory response to acute hypoxia was attenuated by prolonged postnatal hyp...
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pub_type: 杂志文章
doi:10.1203/00006450-199312000-00024
更新日期:1993-12-01 00:00:00
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journal_title:Pediatric research
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更新日期:2014-02-01 00:00:00
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更新日期:2013-08-01 00:00:00