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Article: Bacterial communities associated with scyphomedusae at Helgoland Roads

Hao, Wenjin / Gerdts, Gunnar / Holst, Sabine / Wichels, Antje

Marine biodiversity, 49:1489-1503

2018

Abstract: Different modes of asexual and sexual reproduction are typical for the life history of scyphozoans, and numerous studies have focused on general life history distribution, reproductive strategies, strobilation-inducing factors, growth rates, and ... ...

Institution	Senckenberg am Meer
Abstract	Different modes of asexual and sexual reproduction are typical for the life history of scyphozoans, and numerous studies have focused on general life history distribution, reproductive strategies, strobilation-inducing factors, growth rates, and predatory effects of medusae. However, bacteria associated with different life stages of Scyphozoa have received less attention. In this study, bacterial communities associated with different body compartments and different life stages of two common scyphomedusae (Cyanea lamarckii and Chrysaora hysoscella) were analyzed via automated ribosomal intergenic spacer analysis (ARISA). We found that the bacterial community associated with these two species showed species-specific structuring. In addition, we observed significant differences between the bacterial communities associated with the umbrella and other body compartments (gonads and tentacles) of the two scyphomedusan species. Bacterial community structure varied from the early planula to the polyp and adult medusa stages. We also found that the free-living and particle-associated bacterial communities associated with different food sources had no impact on the bacterial community associated with fed polyps.
Keywords	Chrysaora hysoscella ; Cyanea lamarckii ; Automated ribosomal intergenic spacer analysis (ARISA) ; German Bight ; Scyphozoan body compartments ; Scyphozoan life stages
Language	English
Document type	Article
Database	Repository for Life Sciences

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Article ; Online: Marine Bacterial Communities in the Xisha Islands, South China Sea

Wang, Yihui / Wang, Lei / Liu, Yongliang / Su, Shengqi / Hao, Wenjin

Diversity. 2023 July 18, v. 15, no. 7

2023

Abstract: Oligotrophic marine environments are ecological funnels in marine ecosystems and are essential for maintaining the health and balance of the entire marine ecosystem. Bacterial communities are one of the most important biological populations, which can ... ...

Abstract	Oligotrophic marine environments are ecological funnels in marine ecosystems and are essential for maintaining the health and balance of the entire marine ecosystem. Bacterial communities are one of the most important biological populations, which can survive in low-nutrient environments and perform a variety of important ecological functions, such as decomposing and absorbing organic waste in the ocean and converting nitrogen from the atmosphere into a usable nitrogen source, thus maintaining the health of marine ecosystems. The bacterioplankton community composition and potential function were analyzed using 16S rRNA gene amplicon sequencing in oligotrophic coral reef sea areas. The diversity of the bacterial community exhibited significant differences between the four studied regions. Proteobacteria (38.58–62.79%) were the most abundant in all sampling sites, followed by Cyanobacteria (15.41–37.28%), Bacteroidota (2.39–6.67%), and Actinobacteriota (0.45–1.83%). Although bacterioplankton communities presented no difference between surface and bottom water regarding community richness and α-diversity, the bacterial community composition presented significant differences between surface and bottom water regarding β-diversity. Alteromonadales, Rhodospirllales, and Chloroplast were identified as the significantly different communities between the surface and bottom (Q value < 0.01). Bacterial community distribution in different regions was mainly affected by pH, dissolved oxygen, and nutrients. Nitrite ammonification, chitinolysis, predatory or exoparasitic, chloroplasts, chemoheterotrophy, aerobic chemoheterotrophy, phototrophic, compound degradation (mostly nutrients and pollutants), nitrogen cycle, fermentation, and intracellular parasitism were the dominant functions in the four regions.
Keywords	Alteromonadales ; Cyanobacteria ; ammonification ; bacterial communities ; bacterioplankton ; chloroplasts ; community structure ; coral reefs ; fermentation ; genes ; marine ecosystems ; nitrites ; nitrogen ; nitrogen cycle ; organic wastes ; oxygen ; pH ; parasitism ; South China Sea
Language	English
Dates of publication	2023-0718
Publishing place	Multidisciplinary Digital Publishing Institute
Document type	Article ; Online
ZDB-ID	2518137-3
ISSN	1424-2818
ISSN	1424-2818
DOI	10.3390/d15070865
Database	NAL-Catalogue (AGRICOLA)

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Article ; Online: Microbiota regulates life-cycle transition and nematocyte dynamics in jellyfish.

Peng, Saijun / Ye, Lijing / Li, Yongxue / Wang, Fanghan / Sun, Tingting / Wang, Lei / Hao, Wenjin / Zhao, Jianmin / Dong, Zhijun

iScience

2023 Volume 26, Issue 12, Page(s) 108444

Abstract: Jellyfish represent one of the most basal animal groups with complex life cycles. The polyp-to-medusa transition, termed strobilation, is the pivotal process that determines the switch in swimming behavior and jellyfish blooms. Their microbiota plays an ... ...

Abstract	Jellyfish represent one of the most basal animal groups with complex life cycles. The polyp-to-medusa transition, termed strobilation, is the pivotal process that determines the switch in swimming behavior and jellyfish blooms. Their microbiota plays an essential role in strobilation. Here, we investigated microbiota-mediated host phenotype dynamics during strobilation in the jellyfish
Language	English
Publishing date	2023-11-19
Publishing country	United States
Document type	Journal Article
ISSN	2589-0042
ISSN (online)	2589-0042
DOI	10.1016/j.isci.2023.108444
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: Luteolin induces apoptosis by impairing mitochondrial function and targeting the intrinsic apoptosis pathway in gastric cancer cells.

Ma, Jun / Pan, Zhaohai / Du, Hongchao / Chen, Xiaojie / Zhu, Xuejie / Hao, Wenjin / Zheng, Qiusheng / Tang, Xuexi

Oncology letters

2023 Volume 26, Issue 2, Page(s) 327

Abstract: Gastric cancer is one of the most lethal cancers worldwide. Research has focused on exploring natural medicines to improve the systematic chemotherapy for gastric cancer. Luteolin, a natural flavonoid, possesses anticancer activities. Nevertheless, the ... ...

Abstract	Gastric cancer is one of the most lethal cancers worldwide. Research has focused on exploring natural medicines to improve the systematic chemotherapy for gastric cancer. Luteolin, a natural flavonoid, possesses anticancer activities. Nevertheless, the mechanism of the anticancer effects of luteolin is still not clear. The present study aimed to verify the inhibitory effect of luteolin on gastric cancer HGC-27, MFC and MKN-45 cells and to explore the underlying mechanism. A Cell Counting Kit-8 cell viability assay, flow cytometry, western blot, an ATP content assay and an enzyme activity testing assay were used. Luteolin inhibited the proliferation of gastric cancer HGC-27, MFC and MKN-45 cells. Further, it impaired mitochondrial integrity and function by destroying the mitochondrial membrane potential, downregulating the activities of mitochondrial electron transport chain complexes (mainly complexes I, III and V), and unbalancing the expression of B cell lymphoma-2 family member proteins, eventually leading to apoptosis of gastric cancer HGC-27, MFC and MKN-45 cells. The intrinsic apoptosis pathway was involved in luteolin's anti-gastric cancer effects. Furthermore, mitochondria were the main target in luteolin-induced gastric cancer apoptosis. The present study may provide a theoretical basis for the research on the effect of luteolin on the mitochondrial metabolism in cancer cells, and pave the way for its practical application in the future.
Language	English
Publishing date	2023-06-13
Publishing country	Greece
Document type	Journal Article
ZDB-ID	2573196-8
ISSN	1792-1082 ; 1792-1074
ISSN (online)	1792-1082
ISSN	1792-1074
DOI	10.3892/ol.2023.13913
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article: Bacterial communities associated with hydromedusa Gonionemus vertens in different regions in Chinese coastal waters

Hao, Wenjin / Wang, Lei / Li, Fan / Sun, Tingting / Peng, Saijun / Li, Yongxue / Zhao, Jianmin / Dong, Zhijun

Journal of oceanology and limnology. 2022 July, v. 40, no. 4

2022

Abstract: Bacteria communities in cnidarian jellyfish can be harmful to many important aquaculture species, as they can be key vectors of bacterial pathogens. However, our knowledge of bacterial communities associated with jellyfish in culture ponds and their ... ...

Abstract	Bacteria communities in cnidarian jellyfish can be harmful to many important aquaculture species, as they can be key vectors of bacterial pathogens. However, our knowledge of bacterial communities associated with jellyfish in culture ponds and their potential roles in the regulation of aquaculture species remains unclear. In this study, sequencing based on the bacterial 16S rRNA gene was used to investigate the composition and variation of the bacterial communities associated with hydromedusa Gonionemus vertens in sea cucumber culture ponds and natural marine environment. The associated bacterial communities of G. vertens from the culture ponds in the Yellow Sea and Bohai Sea had significantly different compositions, when compared with those from ambient seawater environment. Furthermore, bacterial communities associated with G. vertens had similar diversity and composition in culture ponds and natural marine environment in the Yellow Sea. There were 31 unique bacterial biomarkers identified in three locations. The major communities were highly abundant in Kiloniellales, Octadecabacter, Polynucleobacter, and Polaribacter, and are related to the environmental information processing. Pathogen candidates such as Vibrionales and Chlamydiales had notably low relative abundances (<1%). The venom of the jellyfish was considered responsible for damage to the aquaculture. This study provides important data to help assess the impact of cnidarians-associated bacterial communities on pond aquaculture and the influences on material cycling and energy flow in marine ecosystems.
Keywords	Chlamydiales ; Kiloniellales ; Octadecabacter ; Polaribacter ; Polynucleobacter ; Scyphozoa ; Vibrionales ; biomarkers ; energy flow ; genes ; limnology ; mariculture ; marine environment ; oceanography ; pathogens ; seawater ; venoms ; Yellow Sea
Language	English
Dates of publication	2022-07
Size	p. 1530-1543.
Publishing place	Science Press
Document type	Article
ISSN	2096-5508
DOI	10.1007/s00343-021-1036-7
Database	NAL-Catalogue (AGRICOLA)

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Article: Bacterial Communities Associated With Four Blooming Scyphozoan Jellyfish: Potential Species-Specific Consequences for Marine Organisms and Humans Health.

Peng, Saijun / Hao, Wenjin / Li, Yongxue / Wang, Lei / Sun, Tingting / Zhao, Jianmin / Dong, Zhijun

Frontiers in microbiology

2021 Volume 12, Page(s) 647089

Abstract: Cnidarians have large surface areas available for colonization by microbial organisms, which serve a multitude of functions in the environment. However, relatively few studies have been conducted on scyphozoan-associated microbial communities. Blooms of ... ...

Abstract	Cnidarians have large surface areas available for colonization by microbial organisms, which serve a multitude of functions in the environment. However, relatively few studies have been conducted on scyphozoan-associated microbial communities. Blooms of scyphozoan species are common worldwide and can have numerous deleterious consequences on the marine ecosystem. Four scyphozoan species,
Language	English
Publishing date	2021-05-05
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	2587354-4
ISSN	1664-302X
ISSN	1664-302X
DOI	10.3389/fmicb.2021.647089
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article: Active learning for anomaly detection in environmental data

Russo, Stefania / Lürig, Moritz / Hao, Wenjin / Matthews, Blake / Villez, Kris

Environmental modelling & software. 2020 Dec., v. 134

2020

Abstract: Due to the growing amount of data from in-situ sensors in environmental monitoring, it becomes necessary to automatically detect anomalous data points. Nowadays, this is mainly performed using supervised machine learning models, which need a fully ... ...

Abstract	Due to the growing amount of data from in-situ sensors in environmental monitoring, it becomes necessary to automatically detect anomalous data points. Nowadays, this is mainly performed using supervised machine learning models, which need a fully labelled data set for their training process. However, the process of labelling data is typically cumbersome and, as a result, a hindrance to the adoption of machine learning methods for automated anomaly detection. In this work, we propose to address this challenge by means of active learning. This method consists of querying the domain expert for the labels of only a selected subset of the full data set. We show that this reduces the time and costs associated to labelling while delivering the same or similar anomaly detection performances. Finally, we also show that machine learning models providing a nonlinear classification boundary are to be recommended for anomaly detection in complex environmental data sets.
Keywords	automation ; computer software ; data collection
Language	English
Dates of publication	2020-12
Publishing place	Elsevier Ltd
Document type	Article
Note	NAL-AP-2-clean
ISSN	1364-8152
DOI	10.1016/j.envsoft.2020.104869
Database	NAL-Catalogue (AGRICOLA)

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Article: Bacterial community succession in response to dissolved organic matter released from live jellyfish

Hao, Wenjin / Fuchs, Bernhardt / Gerdts, Gunnar / Tang, Xuexi / Wichels, Antje

Journal of oceanology and limnology. 2019 July, v. 37, no. 4

2019

Abstract: Jellyfish blooms have increased worldwide, and the outbreaks of jellyfish population not only affect the food web structures via voracious predation but also play an important role in the dynamics of nutrients and oxygen in planktonic food webs. However, ...

Abstract	Jellyfish blooms have increased worldwide, and the outbreaks of jellyfish population not only affect the food web structures via voracious predation but also play an important role in the dynamics of nutrients and oxygen in planktonic food webs. However, it remains unclear whether specific carbon compounds released through jellyfish metabolic processes have the potential to shape bacterial community composition. Therefore, in this study, we aimed to investigate the compositional succession of the bacterioplankton community in response to the dissolved organic matter (DOM) released by the live Scyphomedusae Cyanea lamarckii and Chrysaora hysoscella collected from Helgoland Roads of the North Sea. The bacterial community was significantly stimulated by the DOM released form live jellyfish and different dominant phylotypes were observed for these two Scyphomedusae species. Furthermore, the bacterial community structures in the different DOM sources, jellyfish-incubated media, Kabeltonne seawater, and artificial seawater (DOM-free) were significantly different, as revealed by automated ribosomal intergenic spacer analysis fingerprints. Catalyzed reporter deposition fluorescence in situ hybridization (CARD-FISH) revealed a rapid species-specific shift in bacterial community composition. Gammaproteobacteria dominated the community instead of the Bacteroidetes community for C. lamarckii, whereas Gammaproteobacteria and Bacteroidetes dominated the community for C. hysoscella. The significant differences in the bacterial community composition and succession indicate that the components of the DOM released by jellyfish might differ with jellyfish species.
Keywords	automation ; bacterial communities ; bacterioplankton ; Bacteroidetes ; carbon ; catalytic activity ; community structure ; dissolved organic matter ; fluorescence in situ hybridization ; food webs ; gamma-Proteobacteria ; nutrients ; oxygen ; phylotype ; polymerase chain reaction ; predation ; Scyphozoa ; seawater ; North Sea
Language	English
Dates of publication	2019-07
Size	p. 1229-1244.
Publishing place	Science Press
Document type	Article
ISSN	2096-5508
DOI	10.1007/s00343-019-8106-0
Database	NAL-Catalogue (AGRICOLA)

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Article ; Online: Luteolin potentiates low-dose oxaliplatin-induced inhibitory effects on cell proliferation in gastric cancer by inducing G

Ma, Jun / Chen, Xiaojie / Zhu, Xuejie / Pan, Zhaohai / Hao, Wenjin / Li, Defang / Zheng, Qiusheng / Tang, Xuexi

Oncology letters

2021 Volume 23, Issue 1, Page(s) 16

Abstract: Although the reduction of oxaliplatin doses may alleviate deleterious side effects of gastrointestinal and gynecological cancer treatment, it also limits the anticancer therapeutic effects. As a high-efficient and low-priced herbal medicine ingredient, ... ...

Abstract	Although the reduction of oxaliplatin doses may alleviate deleterious side effects of gastrointestinal and gynecological cancer treatment, it also limits the anticancer therapeutic effects. As a high-efficient and low-priced herbal medicine ingredient, luteolin is an agent with a broad spectrum of anticancer activities and acts as a potential enhancer of therapeutic effects of chemotherapy agents in cancer treatment. This study focused on the antitumor effects and mechanism of combined treatment with luteolin and oxaliplatin on a mouse forestomach carcinoma (MFC) cell line. The study used CCK-8 assay, flow cytometry, Annexin V-FITC/PI double staining assay, reactive oxygen species testing assay, mitochondrial membrane potential testing assay, and western blot assay. The results showed that luteolin and oxaliplatin exerted synergistic effects on inhibiting MFC cell proliferation by inducing G
Language	English
Publishing date	2021-11-12
Publishing country	Greece
Document type	Journal Article
ZDB-ID	2573196-8
ISSN	1792-1082 ; 1792-1074
ISSN (online)	1792-1082
ISSN	1792-1074
DOI	10.3892/ol.2021.13134
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article: Biomass-derived cellulose nanoparticles display considerable neurotoxicity in zebrafish

Liu, Cong / Zhao, Jinxiang / Zhang, Xu / Wei, Guanyun / Hao, Wenjin / Wang, Xin / Yang, Chao / Shi, Yunwei / Liu, Dong

International journal of biological macromolecules. 2020 Dec. 15, v. 165

2020

Abstract: The widespread use of nanomaterials poses a great threat to human living environments. Among them, biomass-derived cellulose nanoparticle (CN) is one of the widely used nanomaterials. To date, the toxicity of CNs during embryonic development remains ... ...

Abstract	The widespread use of nanomaterials poses a great threat to human living environments. Among them, biomass-derived cellulose nanoparticle (CN) is one of the widely used nanomaterials. To date, the toxicity of CNs during embryonic development remains undetermined. In this study, we exposed zebrafish embryos to cellulose nanofibrils (CNFs) and cellulose nanocrystals (CNCs) to evaluate the toxicity of these CNs. Exposure to CNFs or CNCs below 30 mg/ml exhibited no dose-dependent increases in malformation and mortality in zebrafish embryos. Then we demonstrated that CNs were highly enriched in zebrafish embryo via imaging analyses of embryos treated with FITC-coupled CNCs. In addition, we found that CNF or CNC exposure resulted in compromised motor ability of zebrafish larva. Furthermore, it was revealed that the differentiation and the morphogenesis of motor neurons were significantly interrupted. While, blood vessels were normally patterned, suggesting the specific neurotoxicity of these nanomaterials. Transcriptome sequencing assay showed that the neurotoxicity of CNs in the motor neurons might be attributed to the expression alteration of neural genes. In summary, we discovered the neurotoxicity of CNs for the first time.
Keywords	Danio rerio ; abnormal development ; blood ; cellulose ; cellulose nanofibers ; dose response ; embryogenesis ; humans ; morphogenesis ; mortality ; nanocrystals ; neurotoxicity ; transcriptome
Language	English
Dates of publication	2020-1215
Size	p. 1783-1792.
Publishing place	Elsevier B.V.
Document type	Article
Note	NAL-AP-2-clean
ZDB-ID	282732-3
ISSN	1879-0003 ; 0141-8130
ISSN (online)	1879-0003
ISSN	0141-8130
DOI	10.1016/j.ijbiomac.2020.10.033
Database	NAL-Catalogue (AGRICOLA)

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