Abstract:
BACKGROUND:Premature birth is a significant health care burden. Xenon (Xe) is a general anesthetic with neuroprotective effects. OBJECTIVES:Here, we investigate the neuroprotective role of Xe in a lipopolysaccharide (LPS)- and hypoxia-ischemia (HI)-induced white matter damage (WMD) model. METHODS:Three-day-old Sprague-Dawley rats were randomly divided into a sham group (group A, n = 24), an LPS + HI group (group B, n = 24), and an LPS + HI + Xe group (group C, n = 72). The onset of Xe inhalation started at 0, 2, and 5 h in subgroups C1, C2, and C3, respectively. Next, we performed TUNEL and hematoxylin and eosin (HE) staining; and examined the expression of CLIC4 and Bcl-2 in brain tissues. RESULTS:HE staining revealed distorted cytoarchitecture, tangled nerve fibers, and pyknosis in group B, while Xe treatment improved these histological alterations in the group C pups. Following LPS and HI insult, the number of apoptotic cells significantly increased in group B at 48 and 72 h (p < 0.05), and Xe significantly alleviated apoptosis (p < 0.001) at 24, 48, and 72 h, respectively. Similarly, CLIC4 mRNA expression was significantly increased in group B (p < 0.05), and Xe produced a marked reduction in CLIC4 mRNA expression in group C subgroups (p < 0.05). Western blotting demonstrated enhanced Bcl-2 expression in group C when compared to group B (p < 0.05). CONCLUSIONS:These results demonstrate that LPS and HI successfully induced WMD, and Xe decreased neuronal apoptosis via Bcl-2- and CLIC4-mediated pathways. Moreover, the therapeutic time window of Xe extended for up to 5 h. These findings suggest that Xe can be used as a protective treatment for WMD in premature infants.
journal_name
Neonatologyjournal_title
Neonatologyauthors
Yin X,Zhao J,Jiang H,Li L,Jiang J,Xi H,Peng X,Yin X,Shi X,Zhang Ldoi
10.1159/000487220subject
Has Abstractpub_date
2018-01-01 00:00:00pages
339-346issue
4eissn
1661-7800issn
1661-7819pii
000487220journal_volume
113pub_type
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