Cloning and gene expression of allograft inflammatory factor-1 (AIF-1) provide new insights into injury and bacteria response of the sea cucumber Apostichopus japonicus (Selenka, 1867).
Allograft inflammatory factor-1 (AIF-1) is an interferon (IFN)-γ-inducible Ca(2+)-binding cytokine that associates with the immune defense and inflammatory response. In this study, we reported AIF-1 gene in sea cucumber Apostichopus japonicus (AjAIF-1). The full-length cDNA of AjAIF-1 is 1541 bp with an open reading frame (ORF) of 477 bp encoding 158 amino acids. Two EF-hand Ca(2+)-binding motifs were found in the deduced AjAIF-1. AjAIF-1 was widely expressed in all tested tissues (body wall, intestine, respiratory tree, tube feet, coelomocytes and longitudinal muscle), with the highest expression in respiratory tree. After Vibrio splendidus challenge and physical injury, AjAIF-1 transcripts were significantly upregulated in coelomocytes. The mRNA expression level of AjAIF-1 in coelomocytes reached to the highest value at 4 h (3.38-folds vs. the PBS control, P < 0.05) post injection. After papilla injury, the mRNA level of AjAIF-1 in coelomocytes was upregulated, and its peak value was found at 4 h (3.88-folds vs. the control, P < 0.05). These results indicated that 1) AjAIF-1 sensitively responds to pathogen infection; 2) AjAIF-1 is involved in acute inflammatory response. Our findings gain general information about the role of AjAIF-1 in the innate immunity of A. japonicus.
Key Laboratory of Mariculture & Stock Enhancement in North China's Sea, Ministry of Agriculture, Dalian Ocean University, Dalian 116023, China.
Nanjing
N
Ji
Key Laboratory of Mariculture & Stock Enhancement in North China's Sea, Ministry of Agriculture, Dalian Ocean University, Dalian 116023, China. Electronic address: yaqingchang@hotmail.com.
Yaqing
Y
Chang
Key Laboratory of Mariculture & Stock Enhancement in North China's Sea, Ministry of Agriculture, Dalian Ocean University, Dalian 116023, China.
Chong
C
Zhao
Key Laboratory of Mariculture & Stock Enhancement in North China's Sea, Ministry of Agriculture, Dalian Ocean University, Dalian 116023, China.
Zhengguo
Z
Pang
Key Laboratory of Mariculture & Stock Enhancement in North China's Sea, Ministry of Agriculture, Dalian Ocean University, Dalian 116023, China.
Zhou
Z
He
D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D002135:Calcium-Binding Proteins / Q000737:chemistry / Q000235:genetics* / Q000378:metabolism; D003001:Cloning, Molecular; D016207:Cytokines / Q000737:chemistry / Q000235:genetics* / Q000378:metabolism; D018076:DNA, Complementary / Q000235:genetics / Q000378:metabolism; D005786:Gene Expression Regulation; D007113:Immunity, Innate; D008969:Molecular Sequence Data; D010802:Phylogeny; D012333:RNA, Messenger / Q000235:genetics / Q000378:metabolism; D016415:Sequence Alignment; D047528:Stichopus / Q000235:genetics* / Q000276:immunology / Q000378:metabolism / Q000382:microbiology; D014733:Vibrio / Q000502:physiology
D002135:Calcium-Binding Proteins; D016207:Cytokines; D018076:DNA, Complementary; D012333:RNA, Messenger
Allograft inflammatory factor-1; Apostichopus japonicus; Bacteria challenge; Tissue injury