Article
Environmental Sciences
Reka Svigruha, Istvan Fodor, Janos Gyori, Janos Schmidt, Judit Padisak, Zsolt Pirger
Summary: This study investigated the effects of progestogens in mixtures at environmentally relevant concentrations on Daphnia magna for the first time, finding significant impacts on molecular, cellular, and individual levels in both short-term and long-term exposures, including increased gene expression and activity of GST detoxification enzyme, as well as changes in reproductive capacity. Future research should focus on understanding the potential mechanisms underlying these effects.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Microbiology
Kathrine Obrestad, Sigurd Einum, Olav Vadstein
Summary: Stochastic processes impact gut bacterial composition, which alters the reproductive rate of Daphnia magna.
FEMS MICROBIOLOGY ECOLOGY
(2022)
Article
Engineering, Environmental
Young Hwan Lee, Min-Sub Kim, Yoseop Lee, Chuxin Wang, Seong Chan Yun, Jae-Seong Lee
Summary: This study investigated the effects of interactions between microfibers and freshwater acidification (MFA) on individual Daphnia magna-microbiota interactions. The results showed that MFA interactions can have negative consequences on reproduction, growth, and sex ratio of D. magna, and can induce changes in immunity-and reproduction-related biological processes. The study also revealed that these adverse effects are closely related to changes in microbial communities, suggesting a causal link between D. magna fitness and the microbial community.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Marine & Freshwater Biology
Eunjin Byeon, Min-Sub Kim, Duck-Hyun Kim, Yoseop Lee, Haksoo Jeong, Jin-Sol Lee, Sung-Ah Hong, Jun Chul Park, Hye-Min Kang, Alaa El-Din H. Sayed, Yasuhiko Kato, Sangsu Bae, Hajime Watanabe, Young Hwan Lee, Jae-Seong Lee
Summary: In this study, the genome of the water flea Daphnia magna NIES strain was assembled using Oxford nanopore sequencing tool, and gene targeting was successfully demonstrated using CRISPR/Cas9 technology with the glutathione S-transferase omega 2 (GST-O2) gene as an example. Mutant lines were efficiently created and compared to wild type for their response to arsenic exposure. This research contributes to the future construction of deletion mutants in D. magna for further study of gene functions related to pollutant resistance.
AQUATIC TOXICOLOGY
(2022)
Article
Marine & Freshwater Biology
Haksoo Jeong, Young Hwan Lee, Alaa El -Din H. Sayed, Chang-Bum Jeong, Bingsheng Zhou, Jae-Seong Lee, Eunjin Byeon
Summary: This study investigated the effects of microplastics and chromium on the freshwater organism Daphnia magna. The results showed significant deleterious effects and acute toxicity in Daphnia magna exposed to microplastics, chromium, and their combination. Oxidative stress alterations were observed, and the interaction between microplastics and chromium was indicated. In addition, microplastic exposure led to changes in enzyme activities and mitochondrial transcription dysfunction induced by chromium.
AQUATIC TOXICOLOGY
(2022)
Article
Chemistry, Analytical
Elba Garreta-Lara, Cristian Gomez-Canela, Bruno Campos, Carlos Barata, Roma Tauler, Silvia Lacorte
Summary: This study utilized a combination of target and untargeted analytical approaches to assess the metabolic changes of Daphnia magna exposed to the endocrine disruptor bisphenol A. The results indicated that bisphenol A had an impact on the metabolism of Daphnia magna and potential biomarkers of exposure were discovered.
MICROCHEMICAL JOURNAL
(2021)
Article
Marine & Freshwater Biology
Haksoo Jeong, Cheolho Yoon, Jae-Seong Lee, Eunjin Byeon
Summary: To examine the role of GST-O2 genes in biotransformation and detoxification in Daphnia magna, the study investigated various responses such as in vivo endpoints, arsenic speciation, enzymatic activities, and gene expression pathways. The results showed that MT fleas had higher sensitivity to arsenic and a lower rate of arsenate reduction, leading to higher accumulation of arsenic concentrations and decreased protection against toxicity. The mRNA expression of other GST genes increased but the enzymatic activity of GST decreased in the MT group compared to the WT group. The study highlights the important role of GST-O2 in arsenic biotransformation and detoxification in D. magna.
AQUATIC TOXICOLOGY
(2023)
Article
Biochemistry & Molecular Biology
Jennifer S. S. Strehse, Daniel Hoffmann, Nikolaos Protopapas, Hans-Jorg Martin, Edmund Maser
Summary: This study investigated the products formed during the reduction of 4ONE and 4HNE by Sniffer proteins from Daphnia magna and Daphnia pulex. The results showed that 4HNE is the main product formed from the sniffer-mediated reduction of 4ONE. These findings are important for understanding the reductive metabolism of lipid peroxidation products.
CHEMICO-BIOLOGICAL INTERACTIONS
(2022)
Article
Fisheries
Gulsah Turcihan, Melek Isinibilir Okyar, Yusuf Gufran Zeybek, Kamil Mert Eryalcin
Summary: This research evaluated the effects of different diets on the growth and survival of Daphnia magna. The results showed that feeding the water flea with baker's yeast increased its reproduction and population density, while feeding it with Nannochloropsis oculata increased protein levels. The Daphnia fed with Botrycoccus braunii had the highest lipid and EPA content.
AQUACULTURE RESEARCH
(2022)
Article
Zoology
Kenji Toyota, Masaki Yasugi, Norihisa Tatarazako, Taisen Iguchi, Eiji Watanabe
Summary: In this study, the swimming patterns and dynamics of male and female D. magna were analyzed using computer modeling. The results showed that males displayed greater diffusion in the horizontal direction, which could increase the probability of encountering distant mates. These findings reveal the sex-specific characteristics and reproductive strategies of D. magna.
JOURNAL OF EXPERIMENTAL ZOOLOGY PART A-ECOLOGICAL AND INTEGRATIVE PHYSIOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Juan A. Ramos-Guivar, Jacquelyne Y. Zarria-Romero, Yamerson Canchanya-Huaman, Jorge Andres Guerra, Noemi-Raquel Checca-Huaman, Isabel-Liz Castro-Merino, Edson C. Passamani
Summary: A ternary nanocomposite made of nanomaghemite, nanoanatase, and graphene oxide has been synthesized and its properties after interaction with effluent containing Daphnia magna have been studied. The results show that the nanocomposite does not substantially affect the Daphnia magna and exhibits good physicochemical properties for further applications, such as cleaning polluted effluents.
Article
Environmental Sciences
Ayca Aktas Sukuroglu, Dilek Battal, Kumsal Kocadal, Mehmet Ali Sungur, Ismet Cok, Irfan Unlusayin
Summary: This study conducted biomonitoring and risk assessment on the Turkish population for the first time, measuring urinary levels of Bisphenol A, 4-nonylphenol, and 4-t-octylphenol. While no potential health risk was observed from BPA and 4-NP exposure, there might be health risks associated with 4-t-OP exposure in the Turkish population.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Marine & Freshwater Biology
Ferry Saputra, Michael Edbert Suryanto, Gilbert Audira, Cao Thang Luong, Chih-Hsin Hung, Marri Jmelou Roldan, Ross D. Vasquez, Chung-Der Hsiao
Summary: This study presents a simple and automatic method to analyze the cardiac performance of Daphnia using DeepLabCut software. The use of macro scripts in data summarization and comparison with manual methods further enhances the efficiency of analysis. The study also demonstrates the potential cardiotoxic effects of imidacloprid and pendimethalin on D. magna, highlighting the importance of this method for fast and accurate cardiotoxicity measurements.
AQUATIC TOXICOLOGY
(2023)
Article
Toxicology
Megumi Matsumoto, Haruka Ito, Ayaka Tateishi, Yasuaki Kobayashi, Kotaro Satoh, Keiji Numata, Hitoshi Miyakawa
Summary: Plastics have brought many benefits to our lives, but their persistence in the environment causes serious problems. Research on biodegradable plastics and polymer toxicity assessment often focuses on standardized substances and neglects changes in toxicity due to degradation products. Understanding the impact of degraded polymers on biological activities is crucial for accurate risk assessment.
JOURNAL OF APPLIED TOXICOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Rafika Ben Sghaier, Sopheak Net, Oscar Allahdin, Salma Bessadok, Wissam Sahyoun, Baghdad Ouddane, Dalila Ben Hassan-Chehimi
Summary: The efficacy of modified brick residues for the removal of well-known endocrine disrupting, 4-nonyl phenol (NP) and bisphenol A (BPA) from water was investigated. The in-batch adsorption process was better understood by studying the effect of pH and temperature. The adsorption capacity for NP and BPA was 94 and 92 mg/g, respectively, and the adsorption process followed Freundlich-type and pseudo-second-order kinetic.
