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Deleted in malignant brain tumors 1 (DMBT1) gene relate to immune priming and phagocytosis modulation in the small abalone Haliotis diversicolor

文献类型： 外文期刊

作者： Yao, Tuo 1 ; Tan, Junyuan 1 ; Lu, Jie 1 ; Fu, Shengli 1 ; Xie, Zhilv 1 ; Li, Bing 4 ; Cheng, Changhong 1 ; Ye, Lingtong 1 ;

作者机构： 1.Chinese Acad Fishery Sci, South China Sea Fisheries Res Inst, Key Lab South China Sea Fishery Resources Exploita, Minist Agr & Rural Affairs, Guangzhou 510300, Guangdong, Peoples R China

2.Zhongkai Univ Agr & Engn, Coll Anim Sci & Technol, Guangzhou 510225, Guangdong, Peoples R China

3.Shanghai Ocean Univ, Natl Demonstrat Ctr Expt Fisheries Sci Educ, Shanghai 201306, Peoples R China

4.Aquat Technol Promot Stn Chenghai, Shantou 515800, Peoples R China

关键词： Abalone; DMBT1; Innate immunity; Phagocytic activity; Reinfection

期刊名称：COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY C-TOXICOLOGY & PHARMACOLOGY （ 影响因子：4.3； 五年影响因子：4.1 ）

ISSN： 1532-0456

年卷期： 2025 年 290 卷

页码：

收录情况： SCI

摘要： The small abalone ( Haliotis diversicolor) is an economic shellfish cultured in the south coast of China. In recent years, the frequent occurrence of the disease has led to significant mortality in abalone farms. Deleted in malignant brain tumors 1 (DMBT1), a member of the scavenger receptor cysteine-rich (SRCR) protein family, plays an important role in host defense. However, its function in H. diversicolor remains unknown. In order to evaluate the immune priming effect after secondary infection and elucidate possible regulatory mechanism, a novel DMBT1 from the small abalone H. diversicolor (designated as HdDMBT1) was cloned and characterized in this study. The open reading frame of HdDMBT1 was 2331 bp encoding 776 amino acids with a molecular weight of 84.73 kDa. HdDMBT1 contained conserved active sites with DMBT1 from other species, detected in all tested tissues and had higher expression levels in hepatopancreas. The temporal expression profiles of HdDMBT1 after two challenges of Vibrio harveyi were examined to evaluate priming response in the small abalone. The expression level of HdDMBT1 mRNA in hepatopancreas increased significantly after V. harveyi challenge. Meanwhile, the expression level of HdDMBT1 after the second challenge was significantly higher than that after the first challenge (4.23-fold). RNA interference (RNAi) experiments were conducted to examine the role of HdDMBT1 in response to V. harveyi infection. Knocking down HdDMBT1 decreased the hemocytes phagocytosis (0.48-fold). In addition, the bacterial density in hemolymph and the mortality of abalone raised, when infected with V. harveyi after dsHdDMBT1 injection. These results indicated that HdDMBT1 might play an important role in tolerance to bacterial infection.

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