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Effects of Poria cocos polysaccharide on growth performance,physiological parameters,and lipid metabolism of spotted sea bass Lateolabrax maculatus

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Journal of Oceanology and Limnology 2024年第1期42卷 316-331页

作者： Jing LU Zhangfan HUANG Youling YE Anle XU Zhongbao LI Fisheries College Jimei UniversityXiamen 361021China Fujian Provincial Key Laboratory of Marine Fishery Resources and Eco-environment Xiamen 361021China

The aquaculture industry has developed significantly over the past few decades and has had a substantial impact on the global food supply and marine fisheries ***,some problems arise behind the scenes due to excessive intensive farming,such as slow animal growth,frequent disease,and lipid metabolism *** problems have limited the sustainable development of the aquaculture industry,and a continuable solution is *** use of fungal polysaccharide appears to provide a solution to these ***,different supplemented levels of Poria cocos polysaccharide(PCP)(0,0.4,0.8,1.2,1.6,and 2.0 g/kg,respectively)were fed to spotted sea bass(Lateolabrax maculatus)in similar size(30.28±0.18 g)in current *** effects of PCP on growth,physiological parameters,and lipid metabolism of spotted sea bass were investigated after a 4-week rearing *** showed,fish with PCP intake presented a significantly higher weight gain,specific growth rate,and a significantly lower feed conversion *** higher trypsin activity in liver and intestine were observed in fish with PCP *** superoxide dismutase activity in serum and liver of fish with PCP intake were significantly improved,while significantly higher serum total antioxidant capacity and hepatic catalase activity were also ***,no significant differences in lysozyme and alkaline phosphatase activity were evident among *** with PCP intake showed a significantly lower total cholesterol,but no noteworthy change in triglyceride and lipid-metabolismrelated genes expression were observed among *** indicated that intake of PCP has a positive effect on growth and antioxidant capacity of spotted sea bass,but seems to have a limited effect on the non-specific immunity and lipid metabolism of spotted sea *** on the regression analysis results,1.4 g/kg of PCP is the optimal dose for spotted sea bass in size(30.28±0.18 g).

关键词： spotted sea bass Poria cocos polysaccharide growth lipid metabolism

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Characterization of Caspase Gene Family Members in spotted sea bass(Lateolabrax maculatus)and Their Expression Profiles in Response to Vibrio harveyi Infection

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Journal of Ocean University of China 2023年第5期22卷 1370-1382页

作者： YANGLANG Arat WEN Haishen MAO Xuebin TIAN Yuan WANG Lingyu LI Jinku QI Xin SRISAPOOME Prapansak LI Jifang LI Yun The Key Laboratory of Mariculture(Ocean University of China) Ministry of EducationQingdao 266003China Laboratory of Aquatic Animal Health Management Department of AquacultureFaculty of FisheriesKasetsart UniversityBangkok 10900Thailand

The caspase gene family is a crucial gene cluster that regulates apoptosis which contribute to programmed cell death,cell proliferation and differentiation,and several immune *** our study,a complete set of 12 caspase genes were identified in spotted sea bass Lateolabrax *** genes were divided into three subfamilies:2 inflammatory caspases(casp-1 and casp-14-like),5 apoptosis initiators(casp-2,casp-8a,casp-8b,casp-9,and casp-10),and 5 apoptosis executioners(casp-3a,casp-3b,casp-3-like,casp-6,and casp-7).Their phylogenetic relationships,synteny and gene structures were systematically ***,the relative expression profiles of the caspase family members in the liver,intestine,head kidney,and spleen were measured by q PCR after infection with Vibrio *** results showed that the overall mRNA levels of the caspase genes were dramatically increased after *** infection,and the expression patterns varied among genes and *** caspase genes underwent pronounced expression changes in the head kidney and spleen than in the liver or intestine,mainly after 48 h of the ***,casp-3a,casp-3b,casp-3-like,casp-6,casp-7,casp-8a,casp-8b,casp-10,and casp-14-like in the head kidney,and casp-3-like,casp-6,casp-7,and casp-14-like in the spleen,were the most responsive caspase genes which may contribute significantly to immune regulation in spotted sea ***,the apoptosis level in head kidney and spleen after infection were examined using the Caspase *** study provides a systemic overview of the caspase gene family in spotted sea bass after *** infection and lays a foundation for further deciphering the biological roles of these caspase genes.

关键词： caspase gene family spotted sea bass Vibrio harveyi gene expression apoptosis

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Identification,expression analysis,and functional characterization of ghrelin and its receptors in spotted sea bass(Lateolabrax maculatus)

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Marine Life Science & Technology 2020年第4期2卷 349-359页

作者： Peng Yu Yangyang Zhou Xin Qi Hongying Fan Kaiqiang Zhang Xiaoyan Zhang Yun Li Haishen Wen Key Laboratory of Mariculture Ministry of EducationOcean University of ChinaQingdao 266003China

Ghrelin(Ghrl),an appetite-inducing peptide hormone secreted by the stomach,is the endogenous ligand for the growth hormone secretagogue receptor(Ghs-r).In this study,we identified the preproghrelin gene and its receptors in spotted sea bass(Lateolabrax maculatus).The ghrl gene consisted of an open reading frame(ORF)of 324 nucleotides encoding 107 amino acids,and the premature protein contained a 20-amino-acid mature *** a syntenic analysis,we also validated the annotation of growth hormone secretagogue receptor la(ghs-rla)and growth hormone secretagogue receptor la-1ike(ghs-rla-like),which contained seven-transmembrane structures,in spotted sea *** ORF of ghs-rla consisted of 1152 bp that encoded a 383-amino-acid protein,and(ghs-rla-like) contained an ORF of 2631 bp and produced a protein with 876 amino acids.A phylogenetic analysis showed that spotted sea bass ghrl and its receptors clustered with those of other fishes and were more distantly related to those of other *** situ hybridization revealed that ghrl was highly expressed in the stomach and localized in the mucosa and *** expression of these genes varied during short-term starvation in a time-dependent *** vitro studies showed that after incubation with Ghrl for 3 h enhanced the expression of motilin(mln),gastrin(gas)and cholecystokinin(cck)、but this effect vanished after 6 h of *** summary,Ghrl and its receptors might play important roles in the regulation of food intake in spotted sea bass.

关键词： Ghrl Ghs-r-In vitro experiment Localization spotted sea bass Short-term starvation

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