{"title":"Development of a Rapid Detection Method to Prorocentrum lima by Loop-Mediated Isothermal Amplification with Hydroxy Naphthol Blue","authors":"Chao Yang, Yu Zhen, Jialin Hou, Tiezhu Mi","doi":"10.1007/s10126-024-10310-2","DOIUrl":"10.1007/s10126-024-10310-2","url":null,"abstract":"<div><p><i>Prorocentrum lima</i>, a widely distributed dinoflagellate known for its production of harmful biotoxins, poses a significant threat to humans, aquaculture, and marine ecosystems. As a result, the detection of this toxic alga in coastal waters has become an urgent research focus. In this study, a rapid, sensitive, and cost-effective detection method based on loop-mediated isothermal amplification (LAMP) was developed to identify <i>P. lima.</i> In this method, cell extracts of <i>P. lima</i> were diluted and used directly as templates for amplification, eliminating the need for nucleic acid purification and simplifying the detection process. Hydroxy naphthol blue (HNB) was incorporated into the reaction mix to facilitate result interpretation, enabling visual determination of the amplification outcome with the naked eye. The entire detection process, from DNA extraction to template amplification and product detection, could be completed within 80 min using a simple constant temperature-control device. This LAMP-based detection method demonstrated excellent reliability, specificity, and a low detection limit of 5.87 cells/mL for DNA crude extract. The assay offered an efficient alternative to PCR for rapid detection of <i>P. lima</i>. By streamlining the detection process and offering a visual readout, this technique holds promise for efficient and routine monitoring of harmful algal species, benefitting both research efforts and environmental management strategies.</p></div>","PeriodicalId":690,"journal":{"name":"Marine Biotechnology","volume":null,"pages":null},"PeriodicalIF":2.6,"publicationDate":"2024-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140587022","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Production of Antioxidant, Angiotensin-Converting Enzyme Inhibitory and Osteogenic Gelatin Hydrolysate from Labeo rohita Swim Bladder","authors":"Balaji Wamanrao Kanwate, Kalpana Patel, Sandesh Suresh Karkal, Deependra Rajoriya, Kunal Sharan, Tanaji G. Kudre","doi":"10.1007/s10126-024-10305-z","DOIUrl":"10.1007/s10126-024-10305-z","url":null,"abstract":"<div><p>Optimization of antioxidants and angiotensin-converting enzyme (ACE) inhibitory potential gelatin hydrolysate production from <i>Labeo rohita</i> (rohu) swim bladder (SBGH) by alcalase using central composite design (CCD) of response surface methodology (RSM) was investigated. The maximum degree of hydrolysis (DH), 2,2-diphenyl-1-picrylhydrazyl (DPPH), 2,2′-azino-bis-3-ethylbenzthiazoline-6-sulphonic acid (ABTS), total antioxidants (TAO), and ACE inhibitory activity were achieved at 0.1:1.0 (w/w) enzyme to substrate ratio, 61 °C hydrolysis temperature, and 94-min hydrolysis time. The resulting SBGH obtained at 19.92% DH exhibited the DPPH (24.28 µM TE/mg protein), ABTS (34.47 µM TE/mg protein), TAO (12.01 µg AAE/mg protein), and ACE inhibitory (4.91 µg/mg protein) activity. Furthermore, SBGH at 100 µg/ml displayed osteogenic property without any toxic effects on MC3T3-E1 cells. Besides, the protein content of rohu swim bladder gelatin (SBG) and SBGH was 93.68% and 94.98%, respectively. Both SBG and SBGH were rich in glycine, proline, glutamic acid, alanine, arginine, and hydroxyproline amino acids. Therefore, SBGH could be an effective nutraceutical in functional food development.</p></div>","PeriodicalId":690,"journal":{"name":"Marine Biotechnology","volume":null,"pages":null},"PeriodicalIF":2.6,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140334247","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Oral Administration of Antimicrobial Peptide NZ2114 Through the Microalgal Bait Tetraselmis subcordiformis (Wille) Butcher for Improving the Immunity and Gut Health in Turbot (Scophthalmus maximus L.)","authors":"Ting Yao, Fengjie Sun, Bingkui Zhu, Subing Han, Hao Zhang, Chunxiao Meng, Zhengquan Gao, Yulin Cui","doi":"10.1007/s10126-024-10289-w","DOIUrl":"10.1007/s10126-024-10289-w","url":null,"abstract":"<div><p>Antibiotics are widely used in aquaculture to treat the bacterial diseases. However, the improper use of antibiotics could lead to environmental pollution and development of resistance. As a safe and eco-friendly alternative, antimicrobial peptides (AMPs) are commonly explored as therapeutic agents. In this study, a mutant strain of <i>Tetraselmis subcordiformis</i> containing AMP NZ2114 was developed and used as an oral drug delivery system to reduce the use of antibiotics in turbot (<i>Scophthalmus maximus</i>) aquaculture. The gut, kidney, and liver immune-related genes and their effects on gut digestion and bacterial communities in turbot fed with NZ2114 were evaluated in an 11-day feeding experiment. The results showed that compared with the group fed with wild-type <i>T. subcordiformis</i>, the group fed with <i>T. subcordiformis</i> transformants containing NZ2114 was revealed with decreased levels of both pro-inflammatory factors (TNF-α and IL-1β), inhibitory effect on <i>Staphylococcus aureus</i>, <i>Vibrio parahaemolyticus</i>, and <i>Vibrio splendidus</i> demonstrated by the in vitro simulation experiments, and increased richness and diversity of the gut microbiota of turbot. In conclusion, our study provided a novel, beneficial, and low-cost method for controlling bacteria in turbot culture through the oral drug delivery systems.</p></div>","PeriodicalId":690,"journal":{"name":"Marine Biotechnology","volume":null,"pages":null},"PeriodicalIF":2.6,"publicationDate":"2024-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140171656","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Shujian Chen, Ce Shi, Yangfang Ye, Ronghua Li, Weiwei Song, Changbin Song, Changkao Mu, Zhiming Ren, Chunlin Wang
{"title":"Comparative Transcriptome Analysis Reveals the Light Spectra Affect the Growth and Molting of Scylla paramamosain by Changing the Chitin Metabolism","authors":"Shujian Chen, Ce Shi, Yangfang Ye, Ronghua Li, Weiwei Song, Changbin Song, Changkao Mu, Zhiming Ren, Chunlin Wang","doi":"10.1007/s10126-024-10301-3","DOIUrl":"10.1007/s10126-024-10301-3","url":null,"abstract":"<div><p>Light is an essential ecological factor that has been demonstrated to affect aquatic animals’ behavior, growth performance, and energy metabolism. Our previous study found that the full-spectrum light and cyan light could promote growth performance and molting frequency of <i>Scylla paramamosain</i> while it was suppressed by violet light. Hence, the purpose of this study is to investigate the underlying molecular mechanism that influences light spectral composition on the growth performance and molting of <i>S. paramamosain</i>. RNA-seq analysis and qPCR were employed to assess the differentially expressed genes (DEGs) of eyestalks from <i>S. paramamosain</i> reared under full-spectrum light (FL), violet light (VL), and cyan light (CL) conditions after 8 weeks trial. The results showed that there are 5024 DEGs in FL vs. VL, 3398 DEGs in FL vs. CL, and 3559 DEGs in VL vs. CL observed. GO analysis showed that the DEGs enriched in the molecular function category involved in chitin binding, structural molecular activity, and structural constituent of cuticle. In addition, the DEGs in FL vs. VL were mainly enriched in the ribosome, amino sugar and nucleotide sugar metabolism, lysosome, apoptosis, and antigen processing and presentation pathways by KEGG pathway analysis. Similarly, ribosome, lysosome, and antigen processing and presentation pathways were major terms that enriched in FL vs. CL group. However, only the ribosome pathway was significantly enriched in up-regulated DEGs in VL vs. CL group. Furthermore, five genes were randomly selected from DEGs for qPCR analysis to validate the RNA-seq data, and the result showed that there was high consistency between the RNA-seq and qPCR. Taken together, violet light exposure may affect the growth performance of <i>S. paramamosain</i> by reducing the ability of immunity and protein biosynthesis, and chitin metabolism.</p></div>","PeriodicalId":690,"journal":{"name":"Marine Biotechnology","volume":null,"pages":null},"PeriodicalIF":2.6,"publicationDate":"2024-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140147634","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Swimming Performance in Large Yellow Croaker: Effects of Group Size, Test Protocol, and Recovery Time On Critical Swimming Speed","authors":"Junjia Zeng, Wei Liu, Yacheng Deng, Pengxin Jiang, Zhijun Wang, Yanhong Ou, Hongtao Lu, Yuanjingxi Hui, Hongli Xu, Peng Xu","doi":"10.1007/s10126-024-10303-1","DOIUrl":"10.1007/s10126-024-10303-1","url":null,"abstract":"<div><p>Swimming is critical for fish survival, and little attention has been paid to the swimming performance of large yellow croaker, the largest farmed marine fish in China. To address this gap, we conducted a study to measure the critical swimming speed (U<sub>crit</sub>) of 1050 croaker in a designed swim test flume. Our findings shed light on the effects of group size, U<sub>crit</sub> test protocol, and recovery time on swimming performance. The water flow in the swim flume increased steadily and linearly. The linear fit equation was y = 2.89x + 1.79 with an R<sup>2</sup> of 0.99. With the help of the swim flume, we found that group size, and the U<sub>crit</sub> test protocol had a significant effect on the U<sub>crit</sub> values, except for the recovery time: The U<sub>crit</sub> values obtained in the ramp-U<sub>crit</sub> test averaged 28.32 ± 6.11 cm.s<sup>−1</sup>, which was significantly lower than that obtained in the traditional U<sub>crit</sub> test of 32.75 ± 7.60 cm.s<sup>−1</sup>; The U<sub>crit</sub> value of a group size of 50 fish was 33.51 ± 5.96 cm.s<sup>−1</sup>, which was significantly higher than that of a group of 200 fish (28.49 ± 6.37 cm.s<sup>−1</sup>). These results provide insights into the swimming performance of large yellow croaker and can be used to standardize the swimming test protocols.</p></div>","PeriodicalId":690,"journal":{"name":"Marine Biotechnology","volume":null,"pages":null},"PeriodicalIF":2.6,"publicationDate":"2024-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140127230","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Jing Tian, Hongxia Wang, Pin Huan, Xin Yue, Baozhong Liu
{"title":"Comprehensive Multi-omics Approaches Provide Insights to Summer Mortality in the Clam Meretrix petechialis","authors":"Jing Tian, Hongxia Wang, Pin Huan, Xin Yue, Baozhong Liu","doi":"10.1007/s10126-024-10304-0","DOIUrl":"10.1007/s10126-024-10304-0","url":null,"abstract":"<div><p>Bivalve mass mortalities have been reported worldwide, which not only can be explained as a result of pathogen infection, but may reflect changes in environments. Although these episodes were often reported, there was limited information concerning the molecular responses to various stressors leading to summer mortality. In the present work, RNA sequencing (RNA-seq), tandem mass tagging (TMT)-based quantitative proteomics, and 16S rRNA sequencing were used to explore the natural outbreak of summer mortality in the clam <i>Meretrix petechialis</i>. We identified a total of 172 differentially expressed genes (DEGs) and 222 differentially expressed proteins (DEPs) in the diseased group compared to the normal group. The inconsistent expression profiles of immune DEGs/DEPs may be due to the immune dysregulation of the diseased clams. Notably, 11 solute carrier family genes were found among the top 20 down-regulated genes in the diseased group, indicating that weakened transmembrane transport ability might occur in the diseased clams. Integration analysis of transcriptomic and proteomic results showed that many metabolic processes such as “arginine and proline metabolism” and “tyrosine metabolism” were inhibited in the diseased group, suggesting metabolic inhibition. Moreover, 16S rRNA sequencing revealed that the microbial composition of clam hepatopancreas was disordered in the diseased group. The comparison of DEGs expression between the natural summer mortality event and an artificial challenge experiment involving both <i>Vibrio</i> infection and heat stress revealed 9/15 genes showing similar expression trends between the two conditions, suggesting that the summer mortality might be caused by a combination of high temperature and <i>Vibrio</i> infection. These results would deepen our understanding of summer mortality and provide candidate resistance markers for clam resistance breeding.</p></div>","PeriodicalId":690,"journal":{"name":"Marine Biotechnology","volume":null,"pages":null},"PeriodicalIF":2.6,"publicationDate":"2024-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140126353","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Kunyin Jiang, Chengxun Xu, Hong Yu, Lingfeng Kong, Shikai Liu, Qi Li
{"title":"Transcriptomic and Physiological Analysis Reveal Melanin Synthesis-Related Genes and Pathways in Pacific Oysters (Crassostrea gigas)","authors":"Kunyin Jiang, Chengxun Xu, Hong Yu, Lingfeng Kong, Shikai Liu, Qi Li","doi":"10.1007/s10126-024-10302-2","DOIUrl":"10.1007/s10126-024-10302-2","url":null,"abstract":"<div><p>Shell color is one of the shell traits of molluscs, which has been regarded as an economic trait in some bivalves. Pacific oysters (<i>Crassostrea gigas</i>) are important aquaculture shellfish worldwide. In the past decade, several shell color strains of <i>C. gigas</i> were developed through selective breeding, which provides valuable materials for research on the inheritance pattern and regulation mechanisms of shell color. The inheritance patterns of different shell colors in <i>C. gigas</i> have been identified in certain research; however, the regulation mechanism of oyster pigmentation and shell color formation remains unclear. In this study, we performed transcriptomic and physiological analyses using black and white shell oysters to investigate the molecular mechanism of melanin synthesis in <i>C. gigas.</i> Several pigmentation-related pathways, such as cytochrome P450, melanogenesis, tyrosine metabolism, and the cAMP signaling pathway were found. The majority of differentially expressed genes and some signaling molecules from these pathways exhibited a higher level in the black shell oysters than in the white, especially after <span>l</span>-tyrosine feeding, suggesting that those differences may cause a variation of tyrosine metabolism and melanin synthesis<i>.</i> In addition, the in vitro assay using primary cells from mantle tissue showed that <span>l</span>-tyrosine incubation increased cAMP level, gene and protein expression, and melanin content. This study reveals the difference in tyrosine metabolism and melanin synthesis in black and white shell oysters and provides evidence for the potential regulatory mechanism of shell color in oysters.</p></div>","PeriodicalId":690,"journal":{"name":"Marine Biotechnology","volume":null,"pages":null},"PeriodicalIF":2.6,"publicationDate":"2024-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140127428","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Dewi Yuliani, Fumihiro Morishita, Takuya Imamura, Tatsuya Ueki
{"title":"Vanadium Accumulation and Reduction by Vanadium-Accumulating Bacteria Isolated from the Intestinal Contents of Ciona robusta","authors":"Dewi Yuliani, Fumihiro Morishita, Takuya Imamura, Tatsuya Ueki","doi":"10.1007/s10126-024-10300-4","DOIUrl":"10.1007/s10126-024-10300-4","url":null,"abstract":"<div><p>The sea squirt <i>Ciona robusta</i> (formerly <i>Ciona intestinalis</i> type A) has been the subject of many interdisciplinary studies. Known as a vanadium-rich ascidian, <i>C. robusta</i> is an ideal model for exploring microbes associated with the ascidian and the roles of these microbes in vanadium accumulation and reduction. In this study, we discovered two bacterial strains that accumulate large amounts of vanadium, CD2-88 and CD2-102, which belong to the genera <i>Pseudoalteromonas</i> and <i>Vibrio</i>, respectively. The growth medium composition impacted vanadium uptake. Furthermore, pH was also an important factor in the accumulation and localization of vanadium. Most of the vanadium(V) accumulated by these bacteria was converted to less toxic vanadium(IV). Our results provide insights into vanadium accumulation and reduction by bacteria isolated from the ascidian <i>C. robusta</i> to further study the relations between ascidians and microbes and their possible applications for bioremediation or biomineralization.</p></div>","PeriodicalId":690,"journal":{"name":"Marine Biotechnology","volume":null,"pages":null},"PeriodicalIF":2.6,"publicationDate":"2024-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11043195/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140048405","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Yu-qing Xia, Yi Yang, Yan-yun Liu, Jian-xin Cheng, Ying Liu, Cheng-hua Li, Peng-fei Liu
{"title":"DNA Methylation Analysis Reveals Potential Mechanism in Takifugu rubripes Against Cryptocaryon irritans Infection","authors":"Yu-qing Xia, Yi Yang, Yan-yun Liu, Jian-xin Cheng, Ying Liu, Cheng-hua Li, Peng-fei Liu","doi":"10.1007/s10126-024-10296-x","DOIUrl":"10.1007/s10126-024-10296-x","url":null,"abstract":"<div><p><i>Takifugu rubripes</i> (<i>T. rubripes</i>) is a valuable commercial fish, and <i>Cryptocaryon irritans</i> (<i>C. irritans</i>) has a significant impact on its aquaculture productivity. DNA methylation is one of the earliest discovered ways of gene epigenetic modification and also an important form of modification, as well as an essential type of alteration that regulates gene expression, including immune response. To further explore the anti-infection mechanism of <i>T. rubripes</i> in inhibiting this disease, we determined genome-wide DNA methylation profiles in the gill of <i>T. rubripes</i> using whole-genome bisulfite sequencing (WGBS) and combined with RNA sequence (RNA-seq). A total of 4659 differentially methylated genes (DMGs) in the gene body and 1546 DMGs in the promoter between the infection and control group were identified. And we identified 2501 differentially expressed genes (DEGs), including 1100 upregulated and 1401 downregulated genes. After enrichment analysis, we identified DMGs and DEGs of immune-related pathways including MAPK, Wnt, ErbB, and VEGF signaling pathways, as well as node genes <i>prkcb</i>, <i>myca</i>, <i>tp53</i>, and <i>map2k2a</i>. Based on the RNA-Seq results, we plotted a network graph to demonstrate the relationship between immune pathways and functional related genes, in addition to gene methylation and expression levels. At the same time, we predicted the CpG island and transcription factor of four immune-related key genes <i>prkcb</i> and mapped the gene structure. These unique discoveries could be helpful in the understanding of <i>C. irritans</i> pathogenesis, and the candidate genes screened may serve as optimum methylation-based biomarkers that can be utilized for the correct diagnosis and therapy <i>T. rubripes</i> in the development of the ability to resist <i>C. irritans</i> infection.</p></div>","PeriodicalId":690,"journal":{"name":"Marine Biotechnology","volume":null,"pages":null},"PeriodicalIF":2.6,"publicationDate":"2024-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140038529","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}