Article
Environmental Sciences
David A. Geier, Mark R. Geier
Summary: A study using NHANES data found that 82% of the tested individuals in the United States had detectable concentrations of glyphosate in their urine. There was a significant inverse correlation between glyphosate concentrations and total testosterone and total estradiol concentrations, but no correlation with sex hormone binding globulin concentrations.
Article
Toxicology
Liangliang Wang, Junjie Ding, Peichang Shi, Li Fu, Li Pan, Jiahao Tian, Dongsheng Cao, Hui Jiang, Xiaoqin Ding
Summary: This study developed QSAR models for predicting acute oral toxicity in rats and mice, as well as inhibition constants for human acetylcholinesterase, based on bioactivity data of 456 unique OPs. Machine-learning algorithms were used to explore the influences on prediction performance, leading to the construction of consensus QSAR models with good robustness and practical prediction abilities. However, poor correlation was observed between mammalian-level toxicity and molecular-level inhibition constants of OPs, suggesting that toxicokinetic characteristics must also be considered in the evaluation of OP toxicity.
ARCHIVES OF TOXICOLOGY
(2021)
Article
Biotechnology & Applied Microbiology
Chandra Prakash, Vivek Kumar, Venkatesh Chaturvedi
Summary: Due to population growth and overuse, estrogens are being detected in the environment at alarming levels. This study isolated a strain of Enterobacter sp. capable of metabolizing both 17 alpha-Ethynylestradiol (EE2) and 17 beta-Estradiol (E2) as a sole carbon source. The strain exhibited high rates of E2 degradation compared to EE2, and the degradation of both hormones followed a first-order reaction rate. The formation of Reactive Oxygen Species (ROS) during the degradation process was observed.
WORLD JOURNAL OF MICROBIOLOGY & BIOTECHNOLOGY
(2023)
Article
Environmental Sciences
Jiefeng Tan, Chuyan Liang, Yanfang Guo, Hong Zou, Yuqi Guo, Jiahui Ye, Liping Hou, Xiaolan Wang
Summary: The detection of progestins in aquatic environments and its disruptive effects in fish have gained increasing attention. However, the effects of progestins on thyroid function and neurotoxicity in fish are not well understood. This study investigated the effects of gestodene (GES) on the thyroid endocrine and nervous systems of mosquitofish. The results showed that GES exposure caused a decrease in fish growth, reduced swimming activity, and altered hormone levels and brain transcriptional levels.
Article
Environmental Sciences
Chao Xu, Honghong Gong, Lili Niu, Tianyang Li, Hangqin Guo, Chenjian Hu, Xiaohui Sun, Ling Li, Weiping Liu
Summary: In this study, the maternal transfer risk of uranium in zebrafish was evaluated. The results showed that uranium could transfer from the maternal fish to their offspring, leading to adverse effects on thyroid function, oxidative stress, and embryonic development.
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
(2023)
Article
Engineering, Environmental
Jiefeng Liang, Xiaoxi Yang, Qian S. Liu, Zhendong Sun, Zhihua Ren, Xiaoyun Wang, Qing Zhang, Xiaomin Ren, Xiuchang Liu, Qunfang Zhou, Guibin Jiang
Summary: This study investigated the developmental toxicity of parabens on zebrafish embryos and larvae, with butyl paraben showing the highest toxicity. Paraben exposure led to mortality, decreased hatching rate, reduced body length, lowered heart rate, and malformation. The study also found that paraben exposure disrupted thyroid hormone levels and gene expression in the hypothalamic-pituitary-thyroid axis, indicating their potential thyroid endocrine disruption effects.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Ecology
Sujin Lee, Kyunghee Ji
Summary: This study investigated the effects of the isothiazolinone preservative DCOIT on the embryonic growth and thyroid endocrine system in zebrafish. Exposure to DCOIT led to significant coagulation and delayed hatching in fish embryos, as well as decreased larval length. Lower levels of thyroid hormones triiodothyronine (T3) and thyroxine (T4) were observed, accompanied by changes in gene expression and microRNA levels related to the thyroid axis. The findings suggest that DCOIT-induced hypothyroidism may be associated with genetic and microRNA-level changes affecting development.
Article
Environmental Sciences
Suhua Wang, Guangwei Xing, Fang Li, Bobo Yang, Yu Zhang, Michael Aschner, Rongzhu Lu
Summary: Fasting increases the toxicity of acrylonitrile by inducing CYP2E1 and reducing hepatic GSH.
Article
Chemistry, Multidisciplinary
Zahra Niavarani, Daniel Breite, Andrea Prager, Isabell Thomas, Mathias Kuehnert, Bernd Abel, Roger Glaeser, Agnes Schulze
Summary: Composite microfiltration polyethersulfone membranes with molecularly imprinted particles (MIPs) were developed for efficient and selective adsorption of 17β-estradiol from water. The membranes exhibited significant adsorption loading and high selectivity for 17β-estradiol, even in the presence of other micropollutants. The membranes also showed excellent reusability and a maximum adsorption capacity more than 200 times higher than commercial nanofiltration.
MATERIALS CHEMISTRY FRONTIERS
(2023)
Article
Plant Sciences
Abdullah D. Alanazi, Mourad Ben Said, Abdullah F. Shater, Mohammad Nafi Solaiman Al-Sabi
Summary: This experimental study assessed the acaricidal effects of Elettaria cardamomum essential oil against Hyalomma anatolicum tick in cattle from Saudi Arabia. The results showed promising adulticidal, larvicidal, and repellent effects of the oil, with potential mechanisms involving the inhibition of certain enzymatic activities.
Review
Environmental Sciences
Hafiz Ubaid Ur Rahman, Waqas Asghar, Wahab Nazir, Mansur Abdullah Sandhu, Anwaar Ahmed, Nauman Khalid
Summary: Chlorpyrifos (CPF) is a broad-spectrum chlorinated organophosphate pesticide used for controlling insects and pathogens, but its toxicity can lead to neurological dysfunctions, endocrine disruption, and other serious health complications.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Biochemical Research Methods
Jun-Seong Ahn, Chang-Hyun Jang
Summary: An LC-based aptasensor has been developed to detect 17 beta-estradiol (E2) at picomolar levels by utilizing competitive reactions and interfacial events. The aptasensor changes the optical response of liquid crystals (LCs) through electrostatic interactions with a cationic surfactant (CTAB) and the aptamer. The conformational change of the aptamer due to binding with E2 weakens the electrostatic attraction, resulting in a dark optical image. The E2 sensor showed a detection limit of 3.1 pM in TBS and 6.8 pM in human urine, demonstrating high sensitivity and selectivity without the need for complex analysis equipment.
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
(2023)
Article
Public, Environmental & Occupational Health
Margot Guth, Tyler Pollock, Mandy Fisher, Tye E. Arbuckle, Maryse F. Bouchard
Summary: A study found a negative correlation between urinary paraben concentrations and serum hormone levels in girls, particularly estradiol, LH, and FSH. This suggests that parabens may impact the development and function of the endocrine system in females.
INTERNATIONAL JOURNAL OF HYGIENE AND ENVIRONMENTAL HEALTH
(2021)
Article
Agriculture, Dairy & Animal Science
Jasmine Fusi, Maria Cristina Veronesi, Alberto Prandi, Monica Probo, Massimo Faustini, Tanja Peric
Summary: This study investigated the changes in sexual hormones in dogs during puberty using hair and nail samples to analyze the concentrations of testosterone (T), 17 beta-estradiol (E2), and progesterone (P4). Traditional methods using blood samples are not suitable for long-term studies, but hair and nails have been identified as suitable retrospective biological specimens. The results showed significant increases in T levels in male dogs and E2 levels at puberty and P4 levels after puberty in female dogs. Hair and nail T and nail P4 concentrations could differentiate between male and female dogs at specific sampling times. This study demonstrates the usefulness of hair and nails as biological specimens for studying the changes in T, E2, and P4 during the peripubertal period in dogs.
Article
Pharmacology & Pharmacy
Tianyi Li, Paraskevi Vazakidou, Pim E. G. Leonards, Anastasios Damdimopoulos, Eleftheria Maria Panagiotou, Catarina Arnelo, Kerstin Jansson, Karin Pettersson, Kiriaki Papaikonomou, Majorie van Duursen, Pauliina Damdimopoulou
Summary: This study aims to identify the mechanisms of endocrine disruption using two EDCs, DES and KTZ. The results show that both chemicals affect the pathways related to folliculogenesis and steroidogenesis. Stearoyl-CoA desaturase (SCD) may serve as a potential biomarker of EDC exposure and effects on ovaries.
Article
Environmental Sciences
Yi-Jiun Jean Tsai, Samantha Noel Chase, Evan W. Carson, Leanna Zweig, Tien-Chieh Hung
Summary: Studying cultured populations is crucial for the conservation of imperiled species with limited wild populations. Through laboratory experiments, we found that substrate type and diel timing can influence spawning behavior in cultured delta smelt, with participation in spawning typically involving one female and one or two males.
ESTUARIES AND COASTS
(2022)
Article
Geography, Physical
Ziqiang Zou, Yu Tao, Yuhao Gao, Zixuan Liu, Wenkai Li, Zhengchao Tian, Lirong Lin, Yangbo He, Jiazhou Chen
Summary: Gully head collapse in southern China's granite soil slopes is caused by the combination of water and gravity, resulting in the loss of soil and water. This study used a five-year high-time-resolution soil moisture dataset to analyze the soil moisture dynamics near a gully head. The results showed that the soil moisture regimes were heterogeneous near the gully head, with a lower soil water content closer to the gully head and greater variation closer to the surface. The study also found that gully head collapse was triggered by heavy rainfall when the soil water content in the deep sandy soil layer reached a certain threshold.
Article
Geosciences, Multidisciplinary
Yuhao Gao, Changxin Liu, Ziqiang Zou, Zixuan Liu, Xue Yang, Zhengchao Tian, Yangbo He, Lirong Lin, Jiazhou Chen
Summary: A unique gully morphology called niche-like ephemeral gully (NEG) was found in the granite red soil area in southern China, which is primarily formed in the sandy soil layer and influenced by gravitational erosion. The amount of bank collapse and sediment yield difference in different soil layers play a crucial role in the development of gully into the NEG.
Article
Reproductive Biology
Md Moshiur Rahman, Marzieh Asadi Aghbolaghi, Tien-Chieh Hung
Summary: This study investigated how preservation time affects the sperm and spawning performance of the endangered delta smelt. The results showed that sperm had the highest velocity and motility within the first 5 seconds after activation, while the lowest performance was observed after 3 minutes. Fresh sperm had better performance than sperm preserved for over 24 hours. The best fertilization and hatching rates were found in fresh sperm and sperm preserved for 1 hour.
Review
Environmental Sciences
Wang Lin, Huimin Luo, Jingyi Wu, Tien-Chieh Hung, Beibei Cao, Xiangli Liu, Jifeng Yang, Pinhong Yang
Summary: Waterborne ammonia is a notorious pollutant in aquatic habitats, causing ecotoxicological effects on aquatic animals. Crustaceans, such as shrimp and crabs, can be harmed by ammonia entering their bodies through their gills, resulting in oxidative stress, immunotoxicity, and high mortality. This review aims to synthesize the knowledge on ammonia-induced acute toxicity in crustaceans and emphasize the uptake, elimination, and detoxification processes of ammonia in these animals.
Article
Engineering, Environmental
Florian Mauduit, Amelie Segarra, Julia R. Sherman, Michelle L. Hladik, Luann Wong, Thomas M. Young, Levi S. Lewis, Tien-Chieh Hung, Nann A. Fangue, Richard E. Connon
Summary: The development and behavior of threatened Longfin Smelt were affected by environmentally relevant concentrations of bifenthrin, indicating it could contribute to the observed decline in population.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Multidisciplinary Sciences
Melinda R. Baerwald, Nicole Kwan, Catarina Pien, Grace Auringer, Evan W. Carson, Dennis E. Cocherell, Luke Ellison, Nann A. Fangue, Amanda J. Finger, Daphne A. Gille, Haley Hudson, Tien-Chieh Hung, Ted Sommer, Troy Stevenson, Brian M. Schreier
Summary: Conservation of endangered fishes commonly includes captive breeding, applied research, and management. A captive breeding program for the threatened Delta Smelt has been established since 1996. This study found that captive-reared Delta Smelt can survive and forage successfully in enclosures under semi-natural conditions in the wild.
Article
Fisheries
Md. Moshiur Rahman, Levi S. S. Lewis, Nann A. A. Fangue, Richard E. E. Connon, Tien-Chieh Hung
Summary: Understanding the spawning and rearing habitats of fishes is crucial for fisheries management and conservation. This study investigated the effects of salinity variation on the fertilization, hatching, and growth of longfin smelt. The results showed that fertilization rates were higher in freshwater, while hatching success and larval survival increased with maternal body mass. These findings suggest that longfin smelt can reproduce at a range of salinities, but optimal conditions for their development differ.
AQUACULTURE RESEARCH
(2023)
Article
Environmental Sciences
Tena S. Dhayalan, Franklin D. Tran, Tien-Chieh Hung, Taylor J. Senegal, Vanessa Mora, Levi S. Lewis, Swee J. Teh, Bruce G. Hammock
Summary: This study aimed to find a biomarker capable of rapidly detecting food limitation in Delta Smelt, and identified liver glycogen as a responsive biomarker. The experiment showed that liver glycogen and muscle glycogen both decreased rapidly in the fasting treatment, and liver glycogen concentrations in wild Delta Smelt were lower than those in hatchery fish.
ESTUARIES AND COASTS
(2023)
Article
Evolutionary Biology
Melanie E. F. Lacava, Joanna S. Griffiths, Luke Ellison, Evan W. Carson, Tien-Chieh Hung, Amanda J. Finger
Summary: Adaptation to captivity can lead to reduced fitness in the wild due to domestication. A study on delta smelt in a conservation hatchery revealed a small but significant increase in age at maturity over a decade. The trait of maturation timing was influenced by phenotypic plasticity and the time of year fish were born. However, highly domesticated fish showed a loss of plasticity, possibly due to breeding practices in the hatchery. This loss of plasticity may affect the ability of hatchery fish to align maturation with population peaks and result in lower fitness in the wild.
EVOLUTIONARY APPLICATIONS
(2023)
Article
Fisheries
Yi-Jiun Jean Tsai, Luke Ellison, Troy Stevenson, Evan W. Carson, Tien-Chieh Hung
Summary: The effect of stocking density on the survival and size of Delta Smelt larvae was examined, and it was found that stocking density had no effect on these factors. The study validated the methods used for small-scale Delta Smelt rearing and enhanced conservation efforts.
NORTH AMERICAN JOURNAL OF AQUACULTURE
(2023)
Article
Biodiversity Conservation
Christina Pasparakis, Toni Lohroff, Felix Biefel, Dennis E. Cocherell, Evan W. Carson, Tien-Chieh Hung, Richard E. Connon, Nann A. Fangue, Anne E. Todgham
Summary: The San Francisco Estuary (SFE) is a severely degraded ecosystem, with the delta smelt close to extinction. This study investigates how environmental changes, such as reduced turbidity, increased temperature, and invasive predators, affect the physiology and stress response of juvenile delta smelt. Turbidity has the greatest impact, leading to reduced cortisol and increased glucose and lactate in the fish. Elevated temperatures decrease energy availability, while predator cues have minimal effects on stress response. This study highlights the importance of considering multiple stressors for the management and conservation of delta smelt.
CONSERVATION PHYSIOLOGY
(2023)
Meeting Abstract
Zoology
J. S. Griffiths, W. Mulvaney, A. Finger, B. Davis, T. C. Hung, N. Fangue, A. Whitehead
INTEGRATIVE AND COMPARATIVE BIOLOGY
(2023)
Article
Fisheries
Samantha N. Chase, Yi-Jiun Jean Tsai, Martin Croshaw, Tien-Chieh Hung
Summary: This study examines how salinity and time of day affect the group structure of Delta Smelt, an endangered species on the brink of extinction. The results show that Delta Smelt exhibit behavioral adaptations based on salinity exposure and diel timing. They are more closely grouped in saline water, especially on the first day, and during the day compared to at night. These findings deepen our understanding of how Delta Smelt behaviorally respond to environmental and diel variation.
AQUACULTURE, FISH AND FISHERIES
(2023)
Article
Biodiversity Conservation
Yuzo R. Yanagitsuru, Itza Y. Daza, Levi S. Lewis, James A. Hobbs, Tien-Chieh Hung, Richard E. Connon, Nann A. Fangue
Summary: This study investigated the effects of salinity on longfin smelt yolk-sac larvae. The results showed that the larvae performed best at moderately brackish conditions, explaining their distribution in the field and providing key information for future conservation efforts.
CONSERVATION PHYSIOLOGY
(2022)
