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( Md Tawheed Hasan ),( Won Je Jang ),( Jin Yeong Tak ),( Bong-joo Lee ),( Kang Woong Kim ),( Sang Woo Hur ),( Hyon-sob Han ),( Bo-seong Kim ),( Min-do Huh ),( Shin-kwon Kim ),( In-soo Kong ) 한국미생물생명공학회(구 한국산업미생물학회) 2018 Journal of microbiology and biotechnology Vol.28 No.9
To identify and quantify the effects of a combination of dietary 1 × 10<sup>8</sup> CFU/g Lactococcus lactis subsp. lactis I2 (LI<sub>2</sub>) and 0.1% β-glucooligosaccharides (BGO) on the growth and immunity of olive flounder (Paralichthys olivaceus), a feeding experiment was conducted. Flounder (14 ± 0.5 g) were divided into two groups and fed control and synbiotic feeds for 8 weeks. Investigations were carried out on growth and feed utilization, innate immunity, serum biochemical parameters, intestinal lactic acid bacterial (LAB) viability, microvillus length, and changes in the expression levels of genes encoding pro-inflammatory cytokines (tumor necrosis factor [TNF]-α, interleukin [IL]-1β, and IL-6). Results demonstrated the synbiotic diet had significantly better (p < 0.05) responses in terms of weight gain and specific growth rate, three innate immune parameters (respiratory burst, serum lysozyme, and superoxide dismutase), intestinal LAB viability, and the relative TNF-α expression level (p < 0.05). Moreover, after challenge with Streptococcus iniae (1 × 10<sup>8</sup> CFU/ml), the synbiotically fed group exhibited significantly higher (p < 0.05) protection against streptococcosis, validating the observed changes in immune parameters and induction of the cytokine-encoding gene. Therefore, according to the results of the present study, synbiotic feed (LI<sub>2</sub> + BGO) increased growth, modulated innate immune parameters and protected olive flounder against streptococcosis.
Hasan Md. Tawheed,Kim Hyeon Jong,Hur Sang-Woo,Jeong Seong-Mok,Kim Kang-Woong,Lee Seunghan 한국미생물·생명공학회 2023 Journal of microbiology and biotechnology Vol.33 No.10
In this study, a 12-week feeding experiment was conducted to characterize the effects of exogenous α-amylase on the growth, feed utilization, digestibility, plasma α-amylase activity, feed degradation rate, and fecal particle size of olive flounder (Paralichthys olivaceus). Diet was supplemented with 0 (AA0; control), 100 (AA100), 200 (AA200), or 400 (AA400) mg/kg of α-amylase, respectively. Fish (273.1 ± 2.3 g) were stocked into 12 tanks (25 fish/1,000-L tank) and 3 tanks were randomly selected for each diet group. As a result, α-amylase was found to have no significant effects (p ≥ 0.05) on the growth, feed utilization parameters, and whole-body proximate compositions. α-Amylase-treated fish exhibited only a significant increase in the apparent digestibility coefficient of carbohydrates compared to the controls. In addition, in vitro analyses revealed that α-amylase dose-dependently increased (p < 0.05) the feed degradation rate, while photographs of the intestinal content after 2, 4, and 8 h of feeding demonstrated an improved degradation rate in the α-amylase-treated groups. Plasma α-amylase content was higher in the AA200 and AA400 groups, whereas the control group produced significantly larger-sized fecal particles (90% size class) than these two groups. In the intestine, no changes were observed in the expression levels of the immune-related TNF-α, IL-1β, IL2, immunoglobulin-M, HSP-70, lysozyme, and amylase alpha-2A. However, growth-related genes IGF-1, IGF-2, TGF-β3, and growth hormone genes were upregulated in muscle tissues. Collectively, exogenous α-amylase has positive roles in the modulation of the digestibility coefficient, blood αamylase concentration, growth-related gene expression, and diet degradation for improved digestion in olive flounder.
Hasan, Md Tawheed,Jang, Won Je,Kim, Haham,Lee, Bong-Joo,Kim, Kang Woong,Hur, Sang Woo,Lim, Sang Gu,Bai, Sungchul C.,Kong, In-Soo Elsevier 2018 Fish & shellfish immunology Vol.82 No.-
<P><B>Abstract</B></P> <P> <I>Bacillus</I> sp. SJ-10 (BSJ-10) was identified from traditional Korean fermented fish, the previously recognized prebiotic β-glucooligosaccharides (BGO), and their combination as a synbiotic were prepared to evaluate their individual and synergistic effects in olive flounder (<I>Paralichthys olivaceus</I>). Four diets (one control and three treatments) were formulated containing neither BSJ-10 nor BGO (control), 1 × 10<SUP>8</SUP> CFU g <SUP>−1</SUP> BSJ-10 (BSJ-10), 0.1% BGO (BGO), and 1 × 10<SUP>8</SUP> CFU g<SUP>−1</SUP> BSJ-10 + 0.1% BGO (BSJ-10 + BGO). Triplicates of 15 fish (weight 10 ± 0.25 g) were randomly allocated to the four diet groups and fed one of the diets for 8 weeks. At the end of the experiment, fish weight gain (WG), specific growth rate (SGR), feed conversion ratio, and protein efficiency ratio in BSJ-10, BGO and BSJ-10 + BGO diets were positively modulated (<I>P</I> < 0.05) compared with control. Specially, WG and SGR were significantly (<I>P</I> < 0.05) higher in BSJ-10 + BGO than that of BSJ-10 and BGO (individual component). The innate immune parameters such as respiratory burst, superoxide dismutase, and lysozyme activity (LSZ) of fish fed BSJ-10 and BSJ-10 + BGO (both groups) were significantly (<I>P</I> < 0.05) higher than the control. Moreover, myeloperoxidase activity (MPO) and LSZ of fish fed BSJ-10 + BGO were significantly higher compared with individual component. Compared with control, intestinal BSJ-10 content, expression of interleukin (IL)-1β in liver and kidney, and tumor necrosis factor (TNF)-α in liver were higher in both groups, but microvillus length was increased (<I>P</I> < 0.05) only in BSJ-10 + BGO. During <I>in vivo</I> challenge experiment with <I>Streptococcus iniae</I> (1 × 10<SUP>8</SUP> CFU ml<SUP>−1</SUP>), survival rate of fish was significantly higher in all treatment groups versus control. Moreover, in BSJ-10 + BGO, protection against <I>S. iniae</I> infection and transcription of TNF-α and IL-6 in gill were significantly (<I>P</I> < 0.05) higher than the individual component. Collectively, an improved WG, SGR, MPO, LSZ, transcription of IL-6 and TNF-α, and cumulative survival rate against streptococcosis clearly demonstrates a synergistic outcome of diet BSJ-10 + BGO as synbiotic in olive flounder.</P> <P><B>Highlights</B></P> <P> <UL> <LI> <I>Bacillus</I> sp. SJ-10 (BSJ-10) is identified as a potential probiotic in olive flounder. </LI> <LI> BSJ-10+β-glucooligosaccharides produce synergistic effects on growth and innate immunity. </LI> <LI> Transcription levels of pro-inflammatory cytokines are upregulated by dietary synbiotic. </LI> <LI> Dietary synbiotic is able to increase microvillus length in the intestine. </LI> </UL> </P>
Sumon, Md Afsar Ahmed,Sumon, Tofael Ahmed,Hussain, Md. Ashraf,Lee, Su-Jeong,Jang, Won Je,Sharifuzzaman, S.M.,Brown, Christopher L.,Lee, Eun-Woo,Hasan, Md. Tawheed The Korean Society for Microbiology and Biotechnol 2022 Journal of microbiology and biotechnology Vol.32 No.6
The Nile tilapia Oreochromis niloticus, Atlantic salmon Salmo salar, rainbow trout Oncorhynchus mykiss, olive flounder Paralichthys olivaceus, common carp Cyprinus carpio, grass carp Ctenopharyngodon idella and rohu carp Labeo rohita are farmed commercially worldwide. Production of these important finfishes is rapidly expanding, and intensive culture practices can lead to stress in fish, often reducing resistance to infectious diseases. Antibiotics and other drugs are routinely used for the treatment of diseases and sometimes applied preventatively to combat microbial pathogens. This strategy is responsible for the emergence and spread of antimicrobial resistance, mass killing of environmental/beneficial bacteria, and residual effects in humans. As an alternative, the administration of probiotics has gained acceptance for disease control in aquaculture. Probiotics have been found to improve growth, feed utilization, immunological status, disease resistance, and to promote transcriptomic profiles and internal microbial balance of host organisms. The present review discusses the effects of single and multi-strain probiotics on growth, immunity, heamato-biochemical parameters, and disease resistance of the above-mentioned finfishes. The application and outcome of probiotics in the field or open pond system, gaps in existing knowledge, and issues worthy of further research are also highlighted.