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. 2018 Jun;15(6):4911-4915.
doi: 10.3892/etm.2018.6036. Epub 2018 Apr 5.

Protective mechanism of sulforaphane in Nrf2 and anti-lung injury in ARDS rabbits

Zongjian Sun  1 , Zhiqiang Niu  1 , Shuishui Wu  1 , Shiqiang Shan  1
Affiliations

Protective mechanism of sulforaphane in Nrf2 and anti-lung injury in ARDS rabbits

Zongjian Sun et al. Exp Ther Med. 2018 Jun.

Abstract

The effect of sulforaphane on nuclear factor erythroid 2-related factor 2 (Nrf2) and its protective mechanism for lung injury in rabbits with acute respiratory distress syndrome (ARDS) were investigated. Thirty rabbits were randomly divided into control (n=10), model (n=10) and experimental groups (n=10). Rabbits in model group and experimental group were treated with femoral venous injection of oleic acid to establish the ARDS model, while those in control group were injected with the same volume of normal saline. The experimental group received intravenous injection of sulforaphane. Twelve hours after modeling, the clinical manifestations and deaths of rabbits in each group were recorded and compared, including blood gas indexes, lung index (LI), alveolar damage coefficient, serum Nrf2 expression, as well as messenger ribonucleic acid (mRNA) and protein expression of Nrf2 in lung tissues. Pink frothy sputum and death were observed in rabbits in model group and experimental group, but the number of such cases in experimental group was smaller than that in the model group (p<0.05). Compared with those in control group, LI and IQA in model group and experimental group were increased, but LI and IQA in the experimental group were significantly decreased compared with those in the model group. Compared with those in the model group, the blood gas indexes (PaO2, PaCO2 and SaO2) in the experimental group were significantly increased (p<0.05). Nrf2 in serum and lung tissues of rabbits in experimental group was significantly increased compared with that in model group (p<0.05). Sulforaphane significantly inhibits ARDS in rabbits and plays a protective role in ARDS through upregulating Nrf2.

Keywords: Nrf2; acute lung injury; acute respiratory distress syndrome; mRNA; sulforaphane.

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Figures

Figure 1.
Figure 1.
Detection of pathological features of rabbit lung tissues in two groups via H&E staining. ##P<0.05.
Figure 2.
Figure 2.
Detection of Nrf2 mRNA level in rabbit lung tissues via RT-PCR. Compared with model group, ##P<0.01. Nrf2, nuclear factor erythroid 2-related factor 2.
Figure 3.
Figure 3.
Detection of Nrf2 protein level in rabbit serum via ELISA. Nrf2, nuclear factor erythroid 2-related factor 2.
Figure 4.
Figure 4.
Detection of Nrf2 protein level in rabbit lung tissues via IHC. Nrf2, nuclear factor erythroid 2-related factor 2; IHC, immunohistochemistry.
See this image and copyright information in PMC

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