Condensed tannins decreased the growth performance and impaired intestinal immune function in on-growing grass carp (Ctenopharyngodon idella)

2019 ◽  
Vol 123 (7) ◽  
pp. 737-755 ◽  
Author(s):  
Mei Li ◽  
Lin Feng ◽  
Wei-Dan Jiang ◽  
Pei Wu ◽  
Yang Liu ◽  
...  
Keyword(s):  
Immune Function ◽  
Inflammatory Cytokines ◽  
Grass Carp ◽  
Condensed Tannins ◽  
Transforming Growth Factor ◽  
Ctenopharyngodon Idella ◽  
Control Group ◽  
Mrna Levels ◽  
Distal Intestine ◽  
Proximal Intestine

AbstractThe present study investigated the effects of condensed tannins (CT) on intestinal immune function in on-growing grass carp (Ctenopharyngodon idella). A total of 540 healthy grass carp were fed six diets containing different levels of CT (0, 10·00, 20·00, 30·00, 40·00 and 50·00 g/kg diet) for 70 d and then challenged with Aeromonas hydrophila for 14 d. The results showed that, compared with the control group, dietary CT (1) induced intestinal histopathological lesions and aggravated enteritis; (2) decreased lysozyme and acid phosphatase activities, complement 3 (C3), C4 and IgM contents and down-regulated the Hepcidin, liver-expressed antimicrobial peptide (LEAP)-2A, LEAP-2B, Mucin2 and β-defensin-1 mRNA levels in the proximal intestine (PI), mid intestine (MI) and distal intestine (DI) (P < 0·05); (3) down-regulated the mRNA levels of anti-inflammatory cytokines transforming growth factor (TGF)-β1, TGF-β2 (not in MI and DI), IL-4/13A (not IL-4/13B), IL-10 and IL-11 partly correlated with target of rapamycin (TOR) signalling; and (4) up-regulated the mRNA levels of pro-inflammatory cytokines interferon-γ2, IL-1β, IL-6, IL-8 (not in PI), IL-12p35, IL-12p40, IL-15 and IL-17D partly related to NF-κB signalling in the intestine of on-growing grass carp. Overall, the results indicated that CT could impair the intestinal immune function, and its potential regulation mechanisms were partly associated with the TOR and NF-κB signalling pathways. Finally, based on the percentage weight gain and enteritis morbidity, the maximum allowable levels of CT for on-growing grass carp (232·22–890·11 g) were estimated to be 18·6 and 17·4 g/kg diet, respectively.

scholarly journals Threonine deficiency decreased intestinal immunity and aggravated inflammation associated withNF-κBandtarget of rapamycinsignalling pathways in juvenile grass carp (Ctenopharyngodon idella) after infection withAeromonas hydrophila

2017 ◽  
Vol 118 (2) ◽  
pp. 92-108 ◽  
Author(s):  
Yu-Wen Dong ◽  
Wei-Dan Jiang ◽  
Yang Liu ◽  
Pei Wu ◽  
Jun Jiang ◽  
...  
Keyword(s):  
G Protein ◽  
Grass Carp ◽  
Transforming Growth Factor ◽  
Ctenopharyngodon Idella ◽  
Mrna Levels ◽  
Intestinal Immunity ◽  
Distal Intestine ◽  
Tnf Α ◽  
Grass Carp Ctenopharyngodon Idella ◽  
Proximal Intestine

AbstractThis study aimed to investigate the impacts of dietary threonine on intestinal immunity and inflammation in juvenile grass carp. Six iso-nitrogenous semi-purified diets containing graded levels of threonine (3·99–21·66 g threonine/kg) were formulated and fed to fishes for 8 weeks, and then challenged withAeromonas hydrophilafor 14 d. Results showed that, compared with optimum threonine supplementation, threonine deficiency (1) decreased the ability of fish against enteritis, intestinal lysozyme activities (except in the distal intestine), acid phosphatase activities, complement 3 (C3) and C4 contents and IgM contents (except in the proximal intestine (PI)), and it down-regulated the transcript abundances ofliver-expressed antimicrobial peptide(LEAP)-2A,LEAP-2B,hepcidin, IgZ, IgMandβ-defensin1(except in the PI) (P<0·05); (2) could up-regulate intestinal pro-inflammatory cytokinesTNF-α,IL-1β,IL-6, IL-8andIL-17DmRNA levels partly related toNF-κBsignalling; (3) could down-regulate intestinal anti-inflammatory cytokinetransforming growth factor(TGF)-β1,TGF-β2,IL-4/13A(notIL-4/13B) andIL-10mRNA levels partly by target of rapamycin signalling. Finally, on the basis of the specific growth rate, against the enteritis morbidity and IgM contents, the optimum threonine requirements were estimated to be 14·53 g threonine/kg diet (4·48 g threonine/100 g protein), 15.05 g threonine/kg diet (4·64 g threonine/100 g protein) and 15·17 g threonine/kg diet (4·68 g threonine/100 g protein), respectively.

scholarly journals Effects of Dietary Zearalenone on Oxidative Stress, Cell Apoptosis, and Tight Junction in the Intestine of Juvenile Grass Carp (Ctenopharyngodon idella)

Toxins ◽  
2019 ◽  
Vol 11 (6) ◽  
pp. 333 ◽  
Author(s):  
Ya-Li Wang ◽  
Xiao-Qiu Zhou ◽  
Wei-Dan Jiang ◽  
Pei Wu ◽  
Yang Liu ◽  
...  
Keyword(s):  
Tight Junctions ◽  
Grass Carp ◽  
Structural Integrity ◽  
Ctenopharyngodon Idella ◽  
Related Factor ◽  
Distal Intestine ◽  
Fish Intestine ◽  
Mitogen Activated Protein ◽  
Grass Carp Ctenopharyngodon Idella ◽  
Proximal Intestine

Zearalenone (ZEA) is a prevalent mycotoxin with high toxicity in animals. In order to study its effect on juvenile grass carp (Ctenopharyngodon idella), six diets supplemented with different levels of ZEA (0, 535, 1041, 1548, 2002, and 2507 μg/kg diet) for 10 weeks were studied to assess its toxicity on intestinal structural integrity and potential mechanisms of action. Our report firstly proved that ZEA led to growth retardation and body deformity, and impaired the intestinal structural integrity of juvenile grass carp, as revealed by the following findings: (1) ZEA accumulated in the intestine and caused histopathological lesions; (2) ZEA resulted in oxidative injury, apoptosis, and breached tight junctions in the fish intestine, which were probably associated with Nuclear factor-erythroid 2-related factor 2 (Nrf2), p38 mitogen activated protein kinases (p38MAPK), and myosin light chain kinase (MLCK) signaling pathways, respectively. ZEA had no influence on the antioxidant gene levels of Kelch-like ECH associating protein 1 (Keap1)b (rather than Keap1a), glutathione-S-transferase (GST)P1, GSTP2 (not in the distal intestine (DI)), tight junctions occludin, claudin-c (not in the proximal intestine (PI)), or claudin-3c (not in the mid intestine (MI) or DI).

scholarly journals Dietary choline enhanced skin immune response of juvenile grass carp might be related to STAT3 and NF-kB signaling pathway (Ctenopharyngodon idella)

2020 ◽  
Author(s):  
Ze-Hong Yuan ◽  
Lin Feng ◽  
Wei-dan Jiang ◽  
Pei Wu ◽  
Yang Liu ◽  
...  
Keyword(s):  
Immune Function ◽  
Signaling Pathway ◽  
Inflammatory Cytokines ◽  
Grass Carp ◽  
Protein Level ◽  
Mrna Abundance ◽  
Ctenopharyngodon Idella ◽  
Fish Health ◽  
Underlying Mechanisms ◽  
Dietary Choline

Abstract Background: Choline is an indispensable vitamin of fish; which deficiency affects fish health. Fish health is affected by skin immune function. Hence, the present study was conducted to investigate the effects of dietary choline on skin immune function as well as underlying mechanisms of juvenile grass carp (Ctenopharyngodon idella).Results: The results exhibited that dietary choline (1) advanced the content of phosphatidylcholine (PC), betaine, and choline in grass crap skin (P < 0.05), up-regulated the mRNA abundance of choline transporter CHT1, CTL5, and CTL1 indicating that dietary choline could increase the contents of choline might be connected with choline transporters in the grass carp skin; (2) receded skin lesion and increased the level of IgM, C4, C3, and the activities of acid phosphatase (ACP) and lysozyme activity (LZ), raised mucin2, β-defensin, hepcidin, and LEAP-2B mRNA abundance (rather than LEAP-2A), down-regulated pro-inflammatory cytokines mRNA abundance (IFN-γ2, IL-15, TNF-α, IL-6, IL-12P40, and IL-1β) in skin of juvenile grass carp (P < 0.05), up-regulated anti-inflammatory cytokines mRNA abundance ( IL-10, IL-4/13A, TGF-β1, IL-11, and IL-4/13B) in grass crap skin (P < 0.05) demonstrating that choline enhanced the skin immune function; (3) down-regulated the mRNA abundance of IKKγ, NF-κBp52, , IKKβ, c-Rel, NF-κBp65, STAT3b2, STAT3b1 JAK1, and JAK2 as well as protein level of NF-κBp65 and p-STAT3 Tyr705 in nucleus, inhibited the mRNA and protein level of IkBα (P < 0.05), indicating that choline enhanced immune function might be relevant to JAK/STAT3 and NF-κB signaling pathway in fish skin.Conclusions: In conclusion, choline enhanced the skin immune function might be relate to JAK/STAT3 and NF-κB signaling molecules in fish. Furthermore, based on immune indices of grass carp (9.28-108.97g) skin (C3 and IgM contents as well as ACP activities), the choline requirements were estimated to be 1475.81, 1364.24, and 1574.37 mg/kg diet, respectively.

scholarly journals Effects of Dietary Ochratoxin A on Growth Performance and Intestinal Apical Junctional Complex of Juvenile Grass Carp (Ctenopharyngodon idella)

Toxins ◽  
2020 ◽  
Vol 13 (1) ◽  
pp. 11
Author(s):  
Xin Liu ◽  
Pei Wu ◽  
Wei-Dan Jiang ◽  
Yang Liu ◽  
Jun Jiang ◽  
...  
Keyword(s):  
Ochratoxin A ◽  
Grass Carp ◽  
Structural Integrity ◽  
Fish Growth ◽  
Ctenopharyngodon Idella ◽  
Junctional Complex ◽  
Distal Intestine ◽  
Fish Intestine ◽  
Apical Junctional Complex ◽  
Proximal Intestine

Ochratoxin A (OTA) contamination widely occurs in various feed ingredients and food crops, potentially posing a serious health threat to animals. In this research, 1260 juvenile grass carp were separately fed with seven distinct experimental diets (0, 406, 795, 1209, 1612, 2003 and 2406 µg of OTA/kg of diet) for 60 consecutive days to evaluate OTA’s toxic effect on the intestinal apical junctional complex (including the tight junction (TJ) and the adherents junction (AJ)) and the underlying action mechanisms. Our experiment firstly confirmed that OTA caused fish growth retardation and disrupted the intestinal structural integrity. The detailed results show that OTA (1) depressed the feed efficiency, percentage weight gain and specific growth rate; (2) accumulated in the intestine; (3) caused oxidative damage and increased intestinal permeability; and (4) induced the RhoA/ROCK signaling pathway, destroying intestinal apical junctional complexes. Notably, OTA intervention did not result in changes in the gene expression of claudin-3c (in the proximal intestine (PI)), claudin-b and ZO-2b (in the mid intestine (MI) and distal intestine (DI)) in the fish intestine.

scholarly journals Effects of Dietary Paper Mulberry (Broussonetia Papyrifera) on Growth Performance and Muscle Quality of Grass Carp (Ctenopharyngodon idella)

Animals ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1655
Author(s):  
Tao Tang ◽  
Jinhai Bai ◽  
Zhipeng Ao ◽  
Zehong Wei ◽  
Yi Hu ◽  
...  
Keyword(s):  
Growth Performance ◽  
Muscle Fiber ◽  
Grass Carp ◽  
Crude Protein ◽  
Fiber Diameter ◽  
Control Diet ◽  
Ctenopharyngodon Idella ◽  
Muscle Quality ◽  
Control Group ◽  
Broussonetia Papyrifera

The present study investigated the effects of dietary paper mulberry (Broussonetia Papyrifera, BP) on growth performance, muscle quality and muscle growth-related mRNA expressions of grass carp. Fish (initial weight: 50.0 ± 0.5 g) were fed diets supplemented with 0% (control diet), 5%, 10%, 15% and 20% BP for 8 weeks. The results showed that increasing levels of paper mulberry linearly and quadratically decreased the special gain rate (SGR) and increased the feed conversion rate (FCR) of grass carp (p < 0.05). Significantly positive quadratic trends were found between paper mulberry levels and muscle crude fat or crude protein of grass carp (p < 0.05). In comparison to the control diet, the 10%BP and 15%BP groups had significantly decreased muscle crude fat and increased crude protein (p < 0.05). The levels of paper mulberry resulted in a linear and quadratic increase in water loss of grass carp muscle (p < 0.05), and all groups with paper mulberry supplementation were significantly higher than the control group (p < 0.05). Significant positive linear and quadratic trends were found between the paper mulberry levels and muscle fiber diameter or density of grass carp (p < 0.05). In comparison to the control diet, the significant differences were found in the 15%BP and 20%BP groups (p < 0.05). The muscle adhesiveness and hardness linearly and quadratically increased with the increasing levels of paper mulberry (p < 0.05), and both of which increased significantly when the level of paper mulberry reached 10% (p < 0.05). In addition, the increase in paper mulberry linearly and quadratically improved the expressions of myoblast determination protein (MyoD), myogenin (MyoG), paired box protein 7 (Pax7) and myostatin 1 (MSTN1) (p < 0.05). When the supplementation of paper mulberry reached 15%, the expressions of all these mRNAs were significantly higher than those of the control group (p < 0.05). In summary, adding 5% paper mulberry did not affect the growth of grass carp. However, the supplementation of 10% paper mulberry could improve muscle quality through improving muscle hardness, reducing fat accumulation and muscle fiber diameter, at the cost of reducing growth performance.

scholarly journals Oral Vaccination of Grass Carp (Ctenopharyngodon idella) with Baculovirus-Expressed Grass Carp Reovirus (GCRV) Proteins Induces Protective Immunity against GCRV Infection

Vaccines ◽  
2021 ◽  
Vol 9 (1) ◽  
pp. 41
Author(s):  
Changyong Mu ◽  
Qiwang Zhong ◽  
Yan Meng ◽  
Yong Zhou ◽  
Nan Jiang ◽  
...  
Keyword(s):  
Survival Rate ◽  
Grass Carp ◽  
Oral Vaccine ◽  
Serum Antibody ◽  
Ctenopharyngodon Idella ◽  
Control Group ◽  
Oral Vaccination ◽  
Grass Carp Reovirus ◽  
Silkworm Pupae ◽  
Grass Carp Ctenopharyngodon Idella

The grass carp reovirus (GCRV) causes severe hemorrhagic disease with high mortality and leads to serious economic losses in the grass carp (Ctenopharyngodon idella) industry in China. Oral vaccine has been proven to be an effective method to provide protection against fish viruses. In this study, a recombinant baculovirus BmNPV-VP35-VP4 was generated to express VP35 and VP4 proteins from GCRV type Ⅱ via Bac-to-Bac baculovirus expression system. The expression of recombinant VP35-VP4 protein (rVP35-VP4) in Bombyx mori embryo cells (BmE) and silkworm pupae was confirmed by Western blotting and immunofluorescence assay (IFA) after infection with BmNPV-VP35-VP4. To vaccinate the grass carp by oral route, the silkworm pupae expressing the rVP35-VP4 proteins were converted into a powder after freeze-drying, added to artificial feed at 5% and fed to grass carp (18 ± 1.5 g) for six weeks, and the immune response and protective efficacy in grass carp after oral vaccination trial was thoroughly investigated. This included blood cell counting and classification, serum antibody titer detection, immune-related gene expression and the relative percent survival rate in immunized grass carp. The results of blood cell counts show that the number of white blood cells in the peripheral blood of immunized grass carp increased significantly from 14 to 28 days post-immunization (dpi). The differential leukocyte count of neutrophils and monocytes were significantly higher than those in the control group at 14 dpi. Additionally, the number of lymphocytes increased significantly and reached a peak at 28 dpi. The serum antibody levels were significantly increased at Day 14 and continued until 42 days post-vaccination. The mRNA expression levels of immune-related genes (IFN-1, TLR22, IL-1β, MHC I, Mx and IgM) were significantly upregulated in liver, spleen, kidney and hindgut after immunization. Four weeks post-immunization, fish were challenged with virulent GCRV by intraperitoneal injection. The results of this challenge study show that orally immunized group exhibited a survival rate of 60% and relative percent survival (RPS) of 56%, whereas the control group had a survival rate of 13% and RPS of 4%. Taken together, our results demonstrate that the silkworm pupae powder containing baculovirus-expressed VP35-VP4 proteins could induce both non-specific and specific immune responses and protect grass carp against GCRV infection, suggesting it could be used as an oral vaccine.

scholarly journals Investigating the Role of BATF3 in Grass Carp (Ctenopharyngodon idella) Immune Modulation: A Fundamental Functional Analysis

2019 ◽  
Vol 20 (7) ◽  
pp. 1687 ◽  
Author(s):  
Denghui Zhu ◽  
Rong Huang ◽  
Peipei Fu ◽  
Liangming Chen ◽  
Lifei Luo ◽  
...  
Keyword(s):  
Grass Carp ◽  
Immune Modulation ◽  
Nuclear Translocation ◽  
Bimolecular Fluorescence Complementation ◽  
Ctenopharyngodon Idella ◽  
Poly I:C ◽  
Mrna Levels ◽  
Basic Leucine Zipper ◽  
Grass Carp Ctenopharyngodon Idella

Basic leucine zipper transcription factor ATF-like (BATF)-3, belonging to activator protein 1 (AP-1) superfamily transcription factors, is essential for homeostatic development of CD8α+ classical dendritic cells activating CD8 T-cell responses to intracellular pathogens. In this study, the characteristics and cDNA cloning of the CiBATF3 molecule were described in grass carp (Ctenopharyngodon idella). CiBATF3 had abundant expression in immune-related organizations, including liver, spleen and gill, and grass carp reovirus (GCRV) infection had significantly changed its expression level. After Ctenopharyngodon idella kidney (CIK) cells were challenged with pathogen-associated molecular patterns (PAMPs), polyinosinic:polycytidylic acid (poly(I:C)) stimulation induced higher mRNA levels of CiBATF3 than that of lipopolysaccharide (LPS). Subcellular localization showed that CiBATF3-GFP was entirely distributed throughout cells and nuclear translocation of CiBATF3 was found after poly(I:C) treatment. Additionally, the interaction between CiBATF3 and interleukin 10 (IL-10) was proven by bimolecular fluorescence complementation (BiFC) system. The small interfering RNA (siRNA)-mediated CiBATF3 silencing showed that the mRNA of CiBATF3 and its downstream genes were down-regulated in vitro and in vivo. CiBATF3 played a negative regulatory role in the transcriptional activities of AP-1 and NF-κB reporter gene. In summary, the results may provide valuable information on fundamental functional mechanisms of CiBATF3.

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