The changes in cortisol and expression of immune genes of GIFT tilapia Oreochromis niloticus (L.) at different rearing densities under Streptococcus iniae infection

Qiang, Jun; He, Jie; Yang, Hong; Xu, Pao; Habte‐Tsion, Habte‐Michael; Y., X.; Zhu, Zhixiang

doi:10.1007/s10499-016-9995-y

Cited by 66 publications

(23 citation statements)

References 52 publications

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“…Similarly, among treated groups, the TCMBS3 group demonstrating superior expression in CAT after 4 weeks. In agreement with the present study, increased expression of antioxidant genes in MINT have been reported in other olive flounder, Paralichthys olivaceus and tilapia, Oreochromis niloticus (Heo et al., ; Qiang et al., ) after feeding multispecies herbal or probiotic diets. Work carried out on TGF‐β indicates it plays crucial roles in regulating fish immune responses (Standen et al., ; Vaidya & Kale, ).…”

Section: Discussionsupporting

confidence: 93%

“…It has been documented that b-defensins act as the first barrier of defence against viral and bacterial infections (Dong et al, 2015) while lysozyme expression shows evidence of innate immune action acting against bacterial infection (Qiang et al, 2016). A previous study in Gift tilapia, Oreochromis niloticus (Qiang et al, 2016) Vaidya & Kale, 2015). Our results indicated that TGF-b in tilapia MINT in TCMBS3 group after 2 weeks and in all treated groups after 4 weeks were significantly higher than the CT group (Figure 2).…”

Section: Discussionmentioning

confidence: 96%

“…It has been documented that β‐defensins act as the first barrier of defence against viral and bacterial infections (Dong et al., ) while lysozyme expression shows evidence of innate immune action acting against bacterial infection (Qiang et al., ). A previous study in Gift tilapia, Oreochromis niloticus (Qiang et al., ) and in grouper Epinephelus coioides (Sun, Yang, Ma, & Lin, ) reported significant up‐regulation of β‐defensins and lysozyme genes in intestines after probiotic administration. Here, in the MINT, (Figure ) a significantly higher up‐regulation of β‐defensin and lysozyme was observed in TCMBS3 group in comparison with other treated groups or control group after 4 weeks of feeding trial.…”

Section: Discussionmentioning

confidence: 99%

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Influence of traditional Chinese medicine and Bacillus species (TCMBS) on growth, immune response and disease resistance in Nile tilapia, Oreochromis niloticus

et al. 2018

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Multispecies herbs and probiotic bacteria offered to fish might enhance their immune response and increase disease resistance, but the dose effects of herbal‐probiotic application remain unclear. Therefore, the effect of herbal‐probiotic mixtures of traditional Chinese medicine (TCM) of composition Astragalus membranaceus, Angelica sinensis, Crataegus hupehensis and probiotic Bacillus species (BS) of composition Bacillus subtilis and Bacillus lincheniformis as natural immunostimulants in tilapia Oreochromis niloticus have been investigated. Fish were randomly divided into four groups: control diet (CT), TCMBS1 [TCM at 3 g/kg and BS at 7 g/kg], TCMBS2 [TCM at 5 g/kg and BS at 5 g/kg], TCMBS3 [TCM at 7 g/kg and BS at 3 g/kg]. Tilapia in the TCMBS3 group showed significant improvement in weight gain, specific growth rate, and lowered feed conversion ratio compared with other treated groups and the control. Concerning immune indexes, all treated groups significantly enhanced lysozyme, superoxide dismutase, catalase, protease and antiprotease activities, with highest values in catalase and antiprotease activities in TCMBS3 compared with control. TCMBS3 demonstrated higher expression of βeta‐defensin, lysozyme, heat shock protein 70, catalase and transforming growth factor‐βeta compared with other treated groups or the control group in both mid‐intestines and head‐kidney. After challenge with Streptococcus agalactiae, the best survival was found in TCMBS3 (97%), followed by TCMBS2 (73%), and TCMBS1 (69%) compared with the CT (35%). Collectively the present results suggest that TCMBS3 dose might potentiate a higher immune response and disease resistance in fish.

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Section: Discussionsupporting

confidence: 93%

Section: Discussionmentioning

confidence: 96%

Section: Discussionmentioning

confidence: 99%

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Influence of traditional Chinese medicine and Bacillus species (TCMBS) on growth, immune response and disease resistance in Nile tilapia, Oreochromis niloticus

et al. 2018

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“…Present studies have found high mortality and rates of bacterial infection with high stocking density (over 78 fish/m 3 ). Similarly, previous research showed that high stocking density is related to significantly higher mortality (Qiang et al, ). This suggests that better management practices such as harmless treatment of dead or diseased fish, and decreased stocking density in cage farms, would be an effective and inexpensive strategy which could reduce disease outbreaks and transmission in cage farms, especially when combined with good feed and fry quality.…”

Section: Discussionmentioning

confidence: 55%

Phenotypic and genotypic characterization of Streptococcus spp. isolated from tilapia (Oreochromis spp.) cultured in river‐based cage and earthen ponds in Northern Thailand

Niu

Khattiya

Zhang

et al. 2020

Journal of Fish Diseases

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Streptococcus spp. are major pathogenic bacteria associated with massive mortality in tilapia. This study investigated the phenotypic and genotypic characterization of Streptococcus agalactiae (GBS) and Streptococcus iniae (S. iniae) isolated from tilapia in river-based floating cage and earthen pond farms in northern Thailand. Isolates were identified by biochemical and molecular analyses. Capsular typing, enterobacterial repetitive intergenic consensus polymerase chain reaction and multilocus sequence typing were performed to investigate the genetic relatedness. Six and one isolates were confirmed as GBS and S. iniae, respectively. All Streptococcus spp. isolates were obtained from 4 river-based cage farms (4/33), while samples collected from earthen pond farms (N = 28) were negative for streptococcosis. All GBS with serotype Ⅲ and sequence type (ST) 283 was observed. The β-haemolytic GBS isolates were resistant to five antimicrobials, while the S. iniae was susceptible to all antimicrobials. This study indicates both GBS and S. iniae are the major bacterial pathogens responsible for streptococcosis infection in farmed tilapia of northern Thailand with GBS as dominant species. This survey highlights that the river-based cage farms seriously impact on the healthy development of the tilapia industry. K E Y W O R D Searthen pond farm, northern Thailand, river-based cage farm, Streptococcus spp., tilapia ACK N OWLED G EM ENTS

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“…Although tilapia has the potential to tolerate certain levels of salinity (Nugon, 2003 ), a salinity above 8 psu can pose adverse effects on the immune response, disease resistance and antioxidant capacity in tilapia (Alsaid et al, 2013 ; Dominguez et al, 2015 ; Gan et al, 2016 ; Qiang et al, 2016 ). In this study, we also determined that long-term hypersaline stress will cause disorders in the immune systems of Nile tilapia.…”

Section: Discussionmentioning

confidence: 99%

Brain Transcriptome Profiling Analysis of Nile Tilapia (Oreochromis niloticus) Under Long-Term Hypersaline Stress

Liu

et al. 2018

Front. Physiol.

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The fish brain plays an important role in controlling growth, development, reproduction, and adaptation to environmental change. However, few studies stem from the perspective of whole transcriptome change in a fish brain and its response to long-term hypersaline stress. This study compares the differential transcriptomic responses of juvenile Nile tilapia (Oreochromis niloticus) maintained for 8 weeks in brackish water (16 practical salinity units, psu) and in freshwater. Fish brains from each treatment were collected for RNA-seq analysis to identify potential genes and pathways responding to hypersaline stress. A total of 27,089 genes were annotated, and 391 genes were expressed differently in the salinity treatment. Ten pathways containing 40 differentially expressed genes were identified in the tilapia brain. Antigen processing and presentation and phagosome were the two principally affected pathways in the immune system. Thirty-one of 40 genes were involved in various expressions associated with environmental information processing pathways such as neuroactive ligand-receptor interaction, cytokine-cytokine receptor interaction, the Jak-STAT signaling pathway, cell adhesion molecules (CAMs), and the PI3K-Akt signaling pathway, which are the upstream pathways for modulation of immunity and osmoregulation. The most-changed genes (>5-fold) were all down-regulated, including four growth hormone/prolactin gene families, i.e., prolactin precursor (−10.62), prolactin-1 (−11), somatotropin (−10.15), somatolactin-like (−6.18), and two other genes [thyrotropin subunit beta (−7.73) and gonadotropin subunit beta-2 (−5.06)] that stimulated prolactin release in tilapia. The downregulation pattern of these genes corroborates the decrease in tilapia immunity with increasing salinity and reveals an adaptive mechanism of tilapia to long-term hypersaline stress. Ovarian steroidogenesis, isoquinoline alkaloid biosynthesis, and phenylalanine metabolism are the three important pathways in the response of the fish to long-term hypersaline stress. This study has identified several pathways and relevant genes that are involved in salinity regulation in a euryhaline fish and provides insight into understanding regulatory mechanisms of fish to salinity change.

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The changes in cortisol and expression of immune genes of GIFT tilapia Oreochromis niloticus (L.) at different rearing densities under Streptococcus iniae infection

Cited by 66 publications

References 52 publications

Influence of traditional Chinese medicine and Bacillus species (TCMBS) on growth, immune response and disease resistance in Nile tilapia, Oreochromis niloticus

Influence of traditional Chinese medicine and Bacillus species (TCMBS) on growth, immune response and disease resistance in Nile tilapia, Oreochromis niloticus

Phenotypic and genotypic characterization of Streptococcus spp. isolated from tilapia (Oreochromis spp.) cultured in river‐based cage and earthen ponds in Northern Thailand

Brain Transcriptome Profiling Analysis of Nile Tilapia (Oreochromis niloticus) Under Long-Term Hypersaline Stress

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