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https://www.readbyqxmd.com/read/29186702/bioaccumulation-and-risk-assessment-of-organochlorine-pesticides-in-fish-from-a-global-biodiversity-hotspot-isimangaliso-wetland-park-south-africa
#1
Archibold Buah-Kwofie, Marc S Humphries, Letitia Pillay
Organochlorine pesticides (OCPs) have been used extensively in the eastern regions of South Africa for agricultural and malaria control purposes, yet few data exist on the local environmental and social impacts of these compounds. Such issues have become of increasing concern in the iSimangaliso World Heritage Site, where the continued use of OCPs may pose risks to several sensitive and protected species. This study was designed to examine the bioaccumulation of OCPs in two common fish species, Oreochromis mossambicus (Mozambique tilapia) and Clarias gariepinus (African sharptooth catfish) from iSimangaliso Wetland Park...
November 26, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29156308/modulatory-effects-of-green-tea-extract-against-the-hepatotoxic-effects-of-4-nonylphenol-in-catfish-clarias-gariepinus
#2
A H Sayed, Hamdy A M Soliman
The antioxidant role of the green tea (Camellia sinensis) extract (GTE) was examined to remedy the toxic effects of (0.2mgl(-1)) 4-nonylphenol(4-NP). Biochemical parameters, antioxidant enzymes, liver lipid peroxidation (LPO), DNA fragmentation, and apoptosis as well as histopathology of liver of African catfish Clarias gariepinus were considered. Catfishes were divided into four groups: first group (control), second group (0.2mgl(-1) of 4-NP), third group (0.2mgl(-1)of 4-NP +100mg GTE l(-1)water), and fourth group (0...
November 17, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29156287/protective-effect-of-nigella-sativa-on-4-nonylphenol-induced-nephrotoxicity-in-clarias-gariepinus-burchell-1822
#3
Ahmed M Kotb, Mahmoud Abd-Elkareem, Nasser S Abou Khalil, Alaa El-Din H Sayed
The aim of this study was to examine the protective effects of Nigella sativa (N. sativa) on 4-Nonylphenol-induced nephrotoxicity in Clarias gariepinus. 30 fishes were divided into five groups: control, 4-nonylphenol-treated, 1% N. sativa treated, 2.5% N. sativa treated, and 5% N. sativa treated. N. sativa and 4-Nonylphenol were given for 3weeks. 4-NP and 4-NP-N. sativa treated fishes were compared with the control group. Kidney histology, immunochemistry, and electron microscope were assessed after 4-NP exposure...
November 17, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29152462/dietary-intake-of-heavy-metals-from-eight-highly-consumed-species-of-cultured-fish-and-possible-human-health-risk-implications-in-bangladesh
#4
A K M Atique Ullah, M A Maksud, S R Khan, L N Lutfa, Shamshad B Quraishi
Concentrations of five heavy metals (Pb, Cd, Cr, As and Hg) in eight highly consumed cultured fish species (Labeo rohita, Clarias gariepinus, Hypophthalmichthys molitrix, Cyprinus capio, Puntius sarana, Oreochromis mossambicus, Pangasius pangasius and Anabas testudineus) collected from four wholesale markets of Dhaka city, Bangladesh (Karwan Bazar, Mohammadpur Town Hall, Newmarket and Mirpur-1) were measured using atomic absorption spectrometry (AAS) in order to evaluate the potential human health risks from the consumption of fish...
2017: Toxicology Reports
https://www.readbyqxmd.com/read/29146976/association-of-a-variant-in-the-gene-encoding-for-erv1-chemr23-with-reduced-inflammation-in-visceral-adipose-tissue-from-morbidly-obese-individuals
#5
Cristina López-Vicario, Bibiana Rius, José Alcaraz-Quiles, Ana González-Périz, Ana Isabel Martínez-Puchol, Mireia Casulleras, Marta Duran-Güell, Ainitze Ibarzabal, Ricard Corcelles, Andrés Laguna-Fernández, Magnus Back, Esther Titos, Joan Clària
Obesity comorbidities are closely associated with chronic low-grade adipose tissue inflammation. A number of SNPs associated with inflammation has been identified, underscoring the impact of genetic determinants on this process. Here, we screened SNPs in genes with pro-inflammatory (IL-1β, IL-6, STAT3 and JAK2), anti-inflammatory (IL-10 and SOCS3) and pro-resolving (ERV1/ChemR23) properties in 101 obese and 99 non-obese individuals. Among the SNPs analyzed, we identified that individuals carrying a C allele in the rs1878022 polymorphism of the ERV1/ChemR23 gene, which encodes for the receptor of the pro-resolving mediator RvE1, had increased ERV1/ChemR23 protein expression and reduced levels of the inflammatory cytokine IL-6 in adipose tissue...
November 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29134976/uptake-of-zinc-by-pteridium-aquilinum-bracken-fern-and-response-of-clarias-gariepinus-juveniles-during-chronic-and-sub-lethal-exposure
#6
F E Olaifa, A A Fabusoro
Zinc is an essential trace element but can be toxic to fish at elevated concentrations. This study was carried out to assess the uptake of zinc by Clarias gariepinus juveniles and Pteridium aquilinum during chronic exposure to sub lethal concentrations. Two experiments were undertaken simultaneously in static renewal bioassays for 28 days.Haematology, histology, zinc accumulation in tissues of C.gariepinus and P. aquilinum were recorded fortnightly. Packed Cell Volume, haemoglobin concentration, Red Blood Cells, White blood cells, Lymphocytes, Neutrophils, Mean Corpuscular Volume, Mean Corpuscular Haemoglobin Concentration and Mean Corpuscular Haemoglobin of C...
June 30, 2017: Nigerian Journal of Physiological Sciences: Official Publication of the Physiological Society of Nigeria
https://www.readbyqxmd.com/read/29113951/editorial-special-issue-of-the-6th-european-workshop-on-lipid-mediators
#7
EDITORIAL
Dieter Steinhilber, Sönmez Uydeş Doğan, Gökçe Topal, Joan Clària, Xavier Norel, Nils Helge Schebb, Gerard Bannenberg
No abstract text is available yet for this article.
November 4, 2017: Prostaglandins & Other Lipid Mediators
https://www.readbyqxmd.com/read/29105936/circulating-cxcl10-in-cirrhotic-portal-hypertension-might-reflect-systemic-inflammation-and-predict-aclf-and-mortality
#8
Jennifer M Lehmann, Karina Claus, Christian Jansen, Alessandra Pohlmann, Robert Schierwagen, Carsten Meyer, Daniel Thomas, Steffen Manekeller, Joan Claria, Christian P Strassburg, Christian Trautwein, Hermann E Wasmuth, Marie-Luise Berres, Jonel Trebicka
BACKGROUND & AIMS: CXCR% ligands play an important role in hepatic injury, inflammation and fibrosis. While CXCL9 and CXCL11 are associated with survival in patients receiving transjugular intrahepatic portosystemic shunt (TIPS), the role of CXCL10 in severe portal hypertension remains unknown. METHODS: A total of 89 cirrhotic patients were analysed. CXCL10 protein levels were measured in portal and hepatic blood at TIPS insertion and 2 weeks later in 24 patients...
November 6, 2017: Liver International: Official Journal of the International Association for the Study of the Liver
https://www.readbyqxmd.com/read/29057716/safety-assessment-on-microbial-and-heavy-metal-concentration-in-clarias-gariepinus-african-catfish-cultured-in-treated-wastewater-pond-in-kumasi-ghana
#9
Yeboah-Agyepong Mark, Amoah Philip, Agbo W Nelson, Ashley Muspratt, Samuel Aikins
This study assesses the microbial and heavy metal distribution in African catfish (Clarias gariepinus) cultured in waste stabilization pond, and their subsequent suitability for human consumption. Treated wastewater-fed pond (WFP) was used in the culture of the fish with a non-wastewater fed pond (NWFP), fed with ground and rain water as control. Pond water, sediments and fish tissue (gill, liver, gut and skin) samples from both sources were analyzed for pathogens and heavy metal levels. Escherichia coli populations in the sediments and water from the WFP exceeded the maximum permissible limit by 2-3 log units as expected...
October 23, 2017: Environmental Technology
https://www.readbyqxmd.com/read/29022141/a-new-species-of-trichodina-ehrenberg-1830-ciliophora-trichodinidae-infecting-farmed-clarias-gariepinus-burchell-siluriformes-clariidae-in-cuba
#10
Fernando Lucas Prats León, Mercedes Martínez Pérez
A new species of Trichodina Ehrenberg, 1830 collected from the skin and fins of farmed North African catfish Clarias gariepinus (Burchell) fingerlings, is described. The new species can be distinguished from other trichodinids by the characteristics of the adhesive disc, especially by the great number of denticles. Trichodina merciae n. sp. is morphologically similar to T. renicola (Mueller, 1931) and T. marplatensis Martorelli, Marcotegui & Alda, 2008, in the number of denticles, but differs in the morphometric data, denticle morphology, environment and location...
November 2017: Systematic Parasitology
https://www.readbyqxmd.com/read/29017851/seasonal-ovarian-immunolocalization-of-neuropeptide-y-and-its-role-in-steriodogenesis-in-asian-catfish-clarias-batrachus
#11
Priyadarshini, Bechan Lal
The present study was undertaken to examine the cellular localization and potential steroidogenic role of neuropeptide Y (NPY) in the ovary of the freshwater catfish, Clarias batrachus. NPY-immunoreaction was observed in the follicular cells (granulosa and thecal cells) in the growing ovarian follicles, and the intensity of staining increased steadily from the initiation of follicular development until follicles were fully grown. Thereafter as follicles matured the stain intensity decreased. Positive correlations were found between NPY expression and the ovarian levels of 17β-estradiol, testosterone, and activities of 3β-hydroxysteroid dehydrogenase (3β-HSD) and 17β-hydroxysteroid dehydrogenase (17β-HSD) in the ovary...
January 1, 2018: General and Comparative Endocrinology
https://www.readbyqxmd.com/read/28959625/human-health-risk-assessment-of-polycyclic-aromatic-hydrocarbons-pahs-in-smoked-fish-species-from-markets-in-southern-nigeria
#12
Isioma Tongo, Ozekeke Ogbeide, Lawrence Ezemonye
Polycyclic Aromatic Hydrocarbons (PAHs) levels in four commonly consumed smoked fish species from markets in Southern Nigeria were assessed to evaluate possible human health risks associated with consumption. Varying levels of PAH congeners were observed in the fish tissues with the highest total concentration of PAHs in Scomber scombrus. High concentrations of benzo(a)pyrene was observed in Clarias gariepinus and Ethmalosa fimbriata with values above the guideline value of 0.05 mg/kg. The Dietary Daily Intake (DDI) value for total PAHs (∑PAHs) was highest for S...
2017: Toxicology Reports
https://www.readbyqxmd.com/read/28944046/growth-performance-and-feed-utilization-of-african-catfish-clarias-gariepinus-fed-a-commercial-diet-and-reared-in-the-biofloc-system-enhanced-with-probiotic
#13
Iskandar Putra, Rusliadi Rusliadi, Muhammad Fauzi, Usman M Tang, Zainal A Muchlisin
Background The objective of the present study was to evaluate the growth performance and feed utilization of African catfish Clarias gariepinus fed a commercial diet and reared in the biofloc system enhanced with probiotic. Methods The treatment was the frequency of probiotic application into the cultured system, namely, 5-day interval, 10-day interval, and 15-day interval for 60 days of experiment. Biofloc culture was grown in an experiment tank (vol. 2000 L) by mixing the probiotic ( Bacillus sp.) 10 mL and molasses 200 mL per liter of water...
2017: F1000Research
https://www.readbyqxmd.com/read/28940578/candidatus-actinochlamydia-pangasiae-sp-nov-chlamydiales-actinochlamydiaceae-a-bacterium-associated-with-epitheliocystis-in-pangasianodon-hypophthalmus
#14
N Sood, P K Pradhan, D K Verma, M K Yadav, Ravindra, A K Dev, T R Swaminathan, N K Sood
Chlamydial infections are recognised as causative agent of epitheliocystis, reported from over 90 fish species. In the present study, the farmed striped catfish Pangasianodon hypophthalmus (14-15 cm, 70-90 g) with a history of cumulative mortality of about 23% during June and July 2015, were brought to the laboratory. The histopathological examination of gills from the affected fish revealed presence of granular basophilic intracellular inclusions, mostly at the base of the interlamellar region and in gill filaments...
September 22, 2017: Journal of Fish Diseases
https://www.readbyqxmd.com/read/28940526/aggression-supersedes-individual-oxygen-demand-to-drive-group-air-breathing-in-a-social-catfish
#15
Shaun S Killen, Andrew J Esbaugh, Nicolas Martins, F Tadeu Rantin, David J McKenzie
Group-living is widespread among animals and comes with numerous costs and benefits. To date, research examining group-living has focused on trade-offs surrounding foraging, while other forms of resource acquisition have been largely overlooked. Air breathing has evolved in many fish lineages, allowing animals to obtain oxygen in hypoxic aquatic environments. Breathing air increases the threat of predation, so some species perform group air breathing, to reduce individual risk. Within species, air breathing can be influenced by metabolic rate as well as personality, but the mechanisms of group air breathing remain unexplored...
September 20, 2017: Journal of Animal Ecology
https://www.readbyqxmd.com/read/28937913/dietary-euphorbia-hirta-extract-improved-the-resistance-of-sharptooth-catfish-clarias-gariepinus-to-aeromonas-hydrophila
#16
Atefeh Sheikhlar, Goh Yong Meng, Razak Alimon, Nicholas Romano, Mahdi Ebrahimi
Aqueous and methanol extracts of lemon Citrus limon peel, Euphorbia hirta (aerial parts), and fenugreek Trigonella foenum-graecum seeds were tested for their in vitro antimicrobial activities against the bacterium Aeromonas hydrophila. A swab paper disk method showed that the methanol extract of E. hirta (EHE) had the largest inhibition zone and the lowest minimal inhibitory concentration compared to all other herbal extracts. Based on these results, EHE was included in the diets of Sharptooth Catfish Clarias gariepinus at 0 (control), 2, 5, or 7 g/kg of diet (experiment 1)...
December 2017: Journal of Aquatic Animal Health
https://www.readbyqxmd.com/read/28926836/percutaneous-biliary-balloon-dilation-impact-of-an-institutional-three-session-protocol-on-patients-with-benign-anastomotic-strictures-of-hepatojejunostomy
#17
Matias E Czerwonko, Pablo Huespe, Oscar Mazza, Martin de Santibanes, Rodrigo Sanchez-Claria, Juan Pekolj, Miguel Ciardullo, Eduardo de Santibanes, Sung Ho Hyon
BACKGROUND: Percutaneous biliary balloon dilation (PBBD) stands as a safe, useful, and inexpensive treatment procedure performed on patients with benign anastomotic stricture of Roux-en-Y hepatojejunostomy (BASH). However, the optimal mode of application is still under discussion. METHODS: A retrospective cohort study was conducted including patients admitted between 2008 and 2015 with diagnosis of BASH. Patients were divided into 2 groups: group I (n = 22), included patients treated after the implementation of an institutional protocol of 3 PBBD sessions within a fixed time interval and group II (n = 24) consisted of our historical control of patients who underwent one or 2 dilation sessions...
September 20, 2017: Digestive Surgery
https://www.readbyqxmd.com/read/28923704/cloning-characterisation-docking-and-expression-analysis-of-3-beta-hydroxysteroid-dehydrogenase-during-ontogenetic-development-and-annual-reproductive-cycles-in-catfish-clarias-batrachus
#18
Irfan Ahmad Bhat, Mohd Ashraf Rather, Mir Ishfaq Nazir, Gireesh-Babu Pathakota, Mukunda Goswami, J K Sundaray, Rupam Sharma
Fish like higher animals, have a well-defined mechanism to produce sex steroids that play a critical role in gonadal development and maturation. In this study, we aimed to analyse the expression pattern of 3β-HSD in different tissues, during ontogenetic development and gonadal recrudescence of Clarias batrachus. A full-length cDNA of 1617 bp including an open reading frame (ORF) of 1125 bp encoding 374 amino acids was isolated from testes of C. batrachus. The docking analysis between C. batrachus 3β-HSD protein and eurycomanone exhibited high binding affinity toward each other with total energy of -108...
January 1, 2018: Theriogenology
https://www.readbyqxmd.com/read/28919451/biphasic-modulation-of-neuro-and-interrenal-steroidogenesis-in-juvenile-african-sharptooth-catfish-clarias-gariepinus-exposed-to-waterborne-di-2-ethylhexyl-phthalate
#19
Augustine Arukwe, Oju R Ibor, Aina O Adeogun
Receptor (i.e. genomic) and non-receptor (or non-genomic) effects of endocrine toxicology have received limited or almost non-existent attention for tropical species and regions. In the present study, we have evaluated the effects of di-(2-ethylhexyl) phthalate (DEHP) on neuro- and interrenal steroidogenesis of the African catfish (Clarias gariepinus) using molecular, immunochemical and physiological approaches. Juvenile fish (mean weight and length: 5.6±0.6g and 8.2±1.2cm, respectively), were randomly distributed into ten 120L rectangular glass tanks containing 60L of dechlorinated tap water, at 50 fish per exposure group...
December 1, 2017: General and Comparative Endocrinology
https://www.readbyqxmd.com/read/28917943/chronic-fluoride-exposure-exacerbates-headkidney-pathology-and-causes-immune-commotion-in-clarias-gariepinus
#20
Rashmi Singh, Md Arafat Hussain, Jai Kumar, Manmohan Kumar, Usha Kumari, Shibnath Mazumder
The current study was aimed to understand the effects of chronic fluoride exposure on fish immune system. African sharp tooth catfish (Clarias gariepinus) were exposed to 73.45mg/L of fluoride corresponding to 1/10 96h LC50 for 30 d and the effects on general fish health and several immune parameters were studied. Chronic fluoride exposure led to significant alteration in serum biochemical parameters including alkaline phosphatase, alanine transaminase, aspartate transaminase, triglycerides, cholesterol and blood urea nitrogen levels revealing the detrimental effect of fluoride on general fish health...
September 6, 2017: Aquatic Toxicology
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