Tanshinone IIA Elicits Neuroprotective Effect Through Activating the Nuclear Factor Erythroid 2-Related Factor-Dependent Antioxidant Response.
Tanshinone IIA (TSA), a principal component derived from the Traditional Chinese Medicine Danshen has been suggested to exert neuroprotective effect against experimental cerebral ischemic/reperfusion injury. But the associated underlying mechanisms still have not been understood. The current study characterized the role of nuclear factor erythroid two-related factor-induced antioxidant response in the neuroprotective efficacy of TSA treatment. The focal cerebral ischemia/reperfusion model was established by 60-minute middle cerebral artery occlusion. At the onset during reperfusion, mice were treated with 10 mg/kg TSA intraperitoneally. The mRNA and nuclear factor erythroid 2 (Nrf2) protein expression, the antioxidant enzymes, and oxidative production levels were measured. To further verify the role of Nrf2 in the neuroprotective effect induced by TSA, the Nrf2 small silenced RNA and Nrf2 knockout mice were used, the neurological function, brain infarct volume, and cellular apoptosis examination were assessed. TSA treatment improved neurological scores, reduced infarct volume, and attenuated the cellular apoptosis. TSA treatment upregulated the expression of Nrf2 mRNA and the contents of Nrf2 protein in nuclear extract. Nrf2 activation by TSA treatment increased the contents of antioxidant enzymes, and reduced the generation of oxidative productions. Either Nrf2 knockdown or Nrf2 knockout abolished the antioxidative and neuroprotective effect of TSA treatment. These results demonstrate that the Nrf2 activation contributes to TSA-induced neuroprotection from experimental ischemic stroke through maintaining antioxidant effect.
1 Department of Anesthesiology and Perioperative Medicine, Xijing Hospital, Fourth Military Medical University , Xi'an, China .|2 Department of Psychiatry, Xijing Hospital, Fourth Military Medical University, Xi'an, China .
Min
M
Cai
1 Department of Anesthesiology and Perioperative Medicine, Xijing Hospital, Fourth Military Medical University , Xi'an, China .
Yongxin
Y
Guo
1 Department of Anesthesiology and Perioperative Medicine, Xijing Hospital, Fourth Military Medical University , Xi'an, China .
Shiquan
S
Wang
3 Department of Anesthesiology, The Second Affiliated Hospital of Xi'an Jiaotong University , Xi'an, China .
Haidong
H
Wei
4 The Medical Department of the Emergence Center of Xi'an , Xi'an, China .
Sisi
S
Sun
1 Department of Anesthesiology and Perioperative Medicine, Xijing Hospital, Fourth Military Medical University , Xi'an, China .
Guangchao
G
Zhao
1 Department of Anesthesiology and Perioperative Medicine, Xijing Hospital, Fourth Military Medical University , Xi'an, China .
Hailong
H
Dong
D045784:Abietanes / Q000494:pharmacology* / Q000627:therapeutic use; D000818:Animals; D000975:Antioxidants / Q000494:pharmacology*; D017209:Apoptosis / Q000187:drug effects; D002545:Brain Ischemia / Q000150:complications / Q000188:drug therapy / Q000473:pathology; D002467:Cell Nucleus / Q000378:metabolism; D055785:Gene Knockdown Techniques; D008297:Male; D018345:Mice, Knockout; D051267:NF-E2-Related Factor 2 / Q000378:metabolism*; D009474:Neurons / Q000187:drug effects / Q000378:metabolism / Q000473:pathology; D018696:Neuroprotective Agents / Q000494:pharmacology* / Q000627:therapeutic use; D010084:Oxidation-Reduction; D021381:Protein Transport / Q000187:drug effects; D015427:Reperfusion Injury / Q000150:complications / Q000188:drug therapy / Q000473:pathology
D045784:Abietanes; D000975:Antioxidants; D051267:NF-E2-Related Factor 2; D018696:Neuroprotective Agents; C021751:tanshinone
cerebral ischemia/reperfusion; experimental stroke; nuclear factor erythroid two-related factor; oxidative stress; tanshinone IIA