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Thymosin beta-4 participate in antibacterial immunity and wound healing in black tiger shrimp, Penaeus monodon

文献类型： 外文期刊

作者： Lin, Changhong 1 ; Qiu, Lihua 1 ; Wang, Pengfei 1 ; Zhang, Bo 1 ; Yan, Lulu 1 ; Zhao, Chao 1 ;

作者机构： 1.Chinese Acad Fishery Sci, South China Sea Fisheries Res Inst, Guangzhou, Peoples R China

2.Shanghai Ocean Univ, Coll Aqua Life Sci & Technol, Shanghai, Peoples R China

3.Minist Agr, Key Lab South China Sea Fishery Resources Exploit, Guangzhou, Peoples R China

4.Key Lab Fishery Ecol & Environm, Guangzhou, Guangdong, Peoples R China

关键词： Thymosin beta-4; Antibacterial immunity; Wound healing; Penaeus monodon

期刊名称：FISH & SHELLFISH IMMUNOLOGY （ 影响因子：4.7； 五年影响因子：4.7 ）

ISSN： 1050-4648

年卷期： 2023 年 141 卷

页码：

收录情况： SCI

摘要： Thymosin beta-4 (T beta 4) is a ubiquitous protein with multiple and diverse intracellular and extracellular functions in vertebrates, which play fundamental roles in innate immune against pathogens and wound healing. In this study, the full-length cDNA of Tfl4 was cloned from Penaeus monodon (designated as PmTfl4), using the technology of rapid amplification of cDNA ends (RACE). The cDNA of PmTfl4 was 1361 bp with an open reading frame (ORF) of 501 bp, which encoding a polypeptide of 166 amino acid. The Quantitative Real-time PCR (qRTPCR) analysis results showed that PmTfl4 was ubiquitously expressed in all the tested shrimp tissues, with the highest expression level was detected in the hemolymph, while the lowest expression level in the muscle. The expression level of PmTfl4 was significantly up-regulated in hepatopancreas after challenged by Vibrio parahaemolyticus, Vibrio harveyi and Staphylococcus aureus. In vitro antimicrobial test showed that the recombinant protein of PmTfl4 (rPmT beta 4) had broad-spectrum of antimicrobial activity, which could inhibit both the growth of gram-negative bacteria and gram-positive bacteria, including Vibrio vulnificus, V. parahaemolyticus, Streptococcus agalactiae, S. aureus and Aeromonas hydrophila. Moreover, rPmT beta 4 had a certain binding ability to different bacteria, and this binding ability exhibits a strong dose-dependent effect. In vivo, PmTfl4 could facilitate external bacterial clearance in shrimp, and have beneficial to shrimp survival post V. parahaemolyticus infection. Furthermore, wound-healing assay was carried out to study the role of PmT beta 4 in the process of wound healing. The results showed that the PmTfl4 expression was significantly up-regulated by injury treatment, and exerted positive effects to promote wound healing. In addition, PmT beta 4 can significantly increase the expression level of superoxide dismutase (SOD) and Catalase (CAT) after injury treatment in shrimp, which would involve in scavenging reactive oxygen species (ROS) caused by the wound. In conclusion, these results indicated that PmT beta 4 may play important roles in antibacterial immunity and wound healing in Penaeus monodon.

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