

FOLLOWUS
1.CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China
2.Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China
3.University of Chinese Academy of Sciences, Beijing 100049, China
Chunyan LI, E-mail: cyli@scsio.ac.cn
Qiang LIN, E-mail: linqiang@scsio.ac.cn
Received:19 August 2020,
Accepted:25 September 2020,
Online First:19 January 2021,
Published:2022-01
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Han JIANG, Chunyan LI, Bo ZHANG, et al. Roles of interleukins in antibacterial immune defense of the brood pouch in the lined seahorse
Han JIANG, Chunyan LI, Bo ZHANG, et al. Roles of interleukins in antibacterial immune defense of the brood pouch in the lined seahorse
Seahorse embryos are brooded in the enclosed nutrient-rich environment of the male brood pouch
which may be prone to bacterial infection. The immune responses of interleukin (IL) genes in the brood pouch have not been well studied. We identified 13 interleukins in the lined seahorse
Hippocampus erectus
. Tissue-specific expression analysis revealed increased mRNA expression levels of
il-1β
il-18
and
il-8
in the brood pouch. When challenged with lipopolysaccharide or
Vibrio parahaemolyticus
il-1β
and
il-18
were active as part of the acute and chronic inflammatory responses
respectively. Importantly
il-8
may be involved in powerful antibacterial immune responses and may be induced by
il-1β
and
il-18
via a process involving the nuclear factor-κB signaling pathway. These results suggest that
il-1β
il-18
and
il-8
may play key roles in the antibacterial immune defense of the brood pouch in male seahorses.
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