Journal of Tropical Oceanography >
Molecular cloning and functional study of mitochondrial manganese superoxide dismutase in Macrobrachium rosenbergii
Copy editor: LIN Qiang
Received date: 2021-08-26
Revised date: 2021-11-04
Online published: 2021-11-09
Supported by
National Natural Science Foundation of China(42006115)
Fund of Guangdong Provincial Key Laboratory of Fishery Ecology and Environment(FEEL-2021-10)
Guangdong Provincial Rural Revitalization Strategy Special Fund(200-2018-XMZC-0001-107-0298)
Macrobrachium rosenbergii is one of the important shrimps for consumers in China. In recent years, bacterial diseases have occurred frequently and caused huge economic losses in M. rosenbergii aquaculture. Therefore, understanding its immune mechanism is essential to guide disease prevention and control. Mitochondrial manganese superoxide dismutase (mMnSOD) is considered to be the first line against oxidative stress, playing a vital role in innate immunity. However, the immune function of mMnSOD is still unclear. To this end, we cloned the mMnSOD of M. rosenbergii (MrmMnSOD), prepared its polyclonal antibodies, and analyzed its expression patterns under Aeromonas hydrophila infection. On the gene expression levels, MrmMnSOD reached a peak after 3- and 6-h infection in hepatopancreas and intestine tissue, respectively. Tissue immunofluorescence analysis showed that the maximum fluorescence intensity occurred at 12 h after infections in both hepatopancreas and intestine tissue. The above results indicated that MrmMnSOD is involved in the immune response against A. hydrophila. Further antibacterial assays showed that MrmMnSOD significantly inhibited the growth of Escherichia coli, A. hydrophila, Vibrio parahaemolyticus, Staphylococcus aureus, and Streptococcus agalactiae, suggesting that MrmMnSOD may belong to an immune-related molecule, which exerts immune function by antibacterial effect. These results enrich the basic theory in crustacean innate immunity, and provide a new target for disease control and drug research for M. rosenbergii breeding in the future.
Key words: Macrobrachium rosenbergii; SOD; expression pattern; antibacterial assay
LI Yanan , LU Linqing , ZHANG Peng , QIN Zhendong , LIN Li , YAN Lei . Molecular cloning and functional study of mitochondrial manganese superoxide dismutase in Macrobrachium rosenbergii[J]. Journal of Tropical Oceanography, 2022 , 41(3) : 111 -118 . DOI: 10.11978/2021109
表1 引物序列Tab. 1 Primers used in the study |
引物 | 序列 (5′—3′) | 用途 |
---|---|---|
MrmMnSOD S1 | CCCTGAAGTTCAATGGAGGAGGT | qRT-PCR |
MrmMnSOD A1 | TTGGGACAAGTAGCAATTTGTAGTG | |
Mr18S F | TAGCAATTCGCCGTCGTTATTC | qRT-PCR内参 |
Mr18S R | CTACCCCCGGAACTCAAAGACT | |
MrmMnSOD-32a S | TATTTTCAGGGATCCGAATTCATGCTCAGTTTCAGCCGTCTG | |
MrmMnSOD-32a A | GTGGTGGTGGTGGTGCTCGAGTCACTTTGCAGCAGCAAATCTT | 载体构建 |
图2 罗氏沼虾mMnSOD的SDS-PAGE检测图M: 蛋白marker, 1: IPTG诱导前菌体总蛋白, 2: IPTG诱导后菌体总蛋白, 3: 诱导后包涵体总蛋白, 4: 纯化后的重组蛋白 Fig. 2 SDS-PAGE detection of M. rosenbergii mitochondrial manganese SOD M, protein marker; 1: total protein from E. coli BL21 (DE3) before IPTG induction; 2: total protein from E. coli BL21 (DE3) after IPTG induction; 3: total protein of the inclusion body; 4: the purified recombinant protein |
图4 嗜水气单胞菌(A. hydrophila)感染后肝胰腺组织免疫荧光分析红色荧光标记MrmMnSOD蛋白, 蓝色荧光标记细胞核 Fig. 4 Immunofluorescence analysis of hepatopancreas after A. hydrophila infection. Red fluorescence represents MrmMnSOD; and blue, nucleus |
[1] |
董学洪, 陈正兴, 2015. 罗氏沼虾养殖中常见病害及防治[J]. 水产养殖, 36(11): 46-48. (in Chinese)
|
[2] |
李亚男, 张海滨, 2018. 海洋无脊椎动物抗氧化酶研究进展[J]. 海洋通报, 37(3): 241-253.
|
[3] |
肖楚康, 方刘, 阮国良, 等, 2019. 罗氏沼虾淡化养殖的现状与展望[J]. 江苏农业科学, 47(8): 29-33.
|
[4] |
|
[5] |
|
[6] |
|
[7] |
|
[8] |
|
[9] |
|
[10] |
|
[11] |
|
[12] |
|
[13] |
|
[14] |
|
[15] |
|
[16] |
|
[17] |
|
[18] |
|
[19] |
|
[20] |
|
[21] |
|
[22] |
|
[23] |
|
[24] |
|
[25] |
|
[26] |
|
[27] |
|
[28] |
|
[29] |
|
[30] |
|
[31] |
|
/
〈 |
|
〉 |