Abstract
Subarachnoid hemorrhage (SAH) is a serious cerebrovascular disease with high mortality, and the mean age at morbidity is younger than in other types of stroke. Early brain injury (EBI) plays a key role in the poor prognoses of SAH. In EBI, multiple forms of cell death have been identified and well studied; however, the role of ferroptosis has not been elucidated. Hence, in this study, we developed an in vivo (SAH rat model) and in vitro model (SH-SY5Y oxyhemoglobin injury model) to understand the role of ferroptosis in EBI, then explored the protective mechanism of ferrostatin-1 (Fer-1). Firstly, we found that neurological scores, blood–brain barrier permeability, brain edema deteriorated after SAH in the in vivo model, cell viability was decreased after SAH in both cortex and SH-SY5Y cells. Further, iron content in cortex was increased after SAH, while transferrin receptor 1 and ferroportin (Fpn) were increased in oxyhemoglobin-treated in vitro model. Additionally, glutathione content and glutathione peroxidase 4 activity were reduced in SAH rats, and lipid peroxides were increased in the oxyhemoglobin-treated cells. Finally, administration of Fer-1 upregulated Fpn and decreased the iron content, then improved the lipid peroxidation and EBI. However, Fer-1 had no effect on the apoptosis. Our study indicated that the ferroptosis was involved in EBI of SAH, and the inhibitor Fer-1 provided neuroprotection against EBI by alleviating ferroptosis, the potential protective mechanism might be via suppressing lipid peroxidation.
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Abbreviations
- BBB:
-
Blood–brain barrier
- CCA:
-
Common carotid artery
- DMT1:
-
Divalent metal transporter 1
- DW:
-
Dry weight
- EBI:
-
Early brain injury
- ECA:
-
External carotid artery
- Fer-1:
-
Ferrostatin-1
- FJC:
-
Fluoro-Jade C
- Fpn:
-
Ferroportin
- GPx4:
-
Glutathione peroxidase 4
- GSH:
-
Glutathione
- Hb:
-
Oxyhemoglobin
- ICH:
-
Intracranial hematoma
- ICA:
-
Internal carotid artery
- IRP1/2:
-
Iron regulatory proteins 1/2
- OD:
-
Optical density
- PBS:
-
Phosphate buffer solution
- ROS:
-
Reactive oxygen species
- SAH:
-
Subarachnoid hemorrhage
- TEM:
-
Transmission electron microscope
- TfR1:
-
Transferrin receptor 1
- WW:
-
Wet weight
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Funding
This work is supported by the American Heart Association, USA (16SDG26420078), Natural Science Foundation of Heilongjiang Province, China (ZD2018018) and Innovation Fund of Harbin Medical University, China (YTSKYCX2018-38HYD).
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Li, Y., Liu, Y., Wu, P. et al. Inhibition of Ferroptosis Alleviates Early Brain Injury After Subarachnoid Hemorrhage In Vitro and In Vivo via Reduction of Lipid Peroxidation. Cell Mol Neurobiol 41, 263–278 (2021). https://doi.org/10.1007/s10571-020-00850-1
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DOI: https://doi.org/10.1007/s10571-020-00850-1