Isaac Buyinza, Grace Ramena, Rebecca Lochmann, Amit Sinha, Michele Jones
Ferritin, transferrin, and transferrin receptors I and II play a vital role in iron metabolism, health, and indication of iron deficiency anaemia in fish. To evaluate the use of high-iron diets to prevent or reverse channel catfish (Ictalurus punctatus) anaemia of unknown causes, we investigated the expression of these iron-regulatory genes and proteins in channel catfish fed plant-based diets. Catfish fingerlings were fed five diets supplemented with 0 (basal), 125, and 250 mg/kg of either inorganic iron or organic iron for 2 weeks. Ferritin, transferrin, and transferrin receptor I and II mRNA and protein expression levels in fish tissues (liver, intestine, trunk kidney, and head kidney) and plasma were determined. Transferrin (iron transporter) and TfR (I and II) genes were generally highly expressed in fish fed the basal diet compared to those fed the iron-supplemented diets. In contrast, ferritin (iron storage) genes were more expressed in the trunk kidney of fish fed the iron-supplemented diets than in those fed the basal diet. Our results demonstrate that supplementing channel catfish plant-based diets with iron from either organic or inorganic iron sources affected the expression of the iron-regulatory genes and increased body iron status in the fish.
铁蛋白、转铁蛋白、转铁蛋白受体 I 和 II 在鱼类的铁代谢、健康和缺铁性贫血的指示中发挥着重要作用。为了评估利用高铁日粮预防或逆转不明原因贫血的方法,我们研究了这些铁调节基因和蛋白质在以植物为基础的日粮喂养的斑点叉尾鮰中的表达情况。我们给鲶鱼幼苗喂食了五种日粮,分别添加 0(基础)、125 和 250 毫克/千克的无机铁或有机铁,喂食时间为 2 周。测定了铁蛋白、转铁蛋白、转铁蛋白受体 I 和 II 在鱼组织(肝脏、肠道、躯干肾脏和头部肾脏)和血浆中的 mRNA 和蛋白质表达水平。与饲喂补铁饲料的鱼类相比,饲喂基础饲料的鱼类转铁蛋白(铁转运体)和转铁蛋白受体(I 和 II)基因的表达量普遍较高。相比之下,铁蛋白(铁储存)基因在喂食补铁饲料的鱼的躯干肾脏中的表达高于喂食基础饲料的鱼。我们的研究结果表明,给斑点叉尾鮰植物性日粮补充有机或无机铁来源的铁会影响铁调节基因的表达,并增加鱼体内的铁含量。
{"title":"Plasma and tissue transferrin and ferritin, and gene expression of ferritin, transferrin, and transferrin receptors I and II in channel catfish Ictalurus punctatus fed diets with different concentrations of inorganic or organic iron","authors":"Isaac Buyinza, Grace Ramena, Rebecca Lochmann, Amit Sinha, Michele Jones","doi":"10.1111/jfd.13953","DOIUrl":"10.1111/jfd.13953","url":null,"abstract":"<p>Ferritin, transferrin, and transferrin receptors I and II play a vital role in iron metabolism, health, and indication of iron deficiency anaemia in fish. To evaluate the use of high-iron diets to prevent or reverse channel catfish (<i>Ictalurus punctatus</i>) anaemia of unknown causes, we investigated the expression of these iron-regulatory genes and proteins in channel catfish fed plant-based diets. Catfish fingerlings were fed five diets supplemented with 0 (basal), 125, and 250 mg/kg of either inorganic iron or organic iron for 2 weeks. Ferritin, transferrin, and transferrin receptor I and II mRNA and protein expression levels in fish tissues (liver, intestine, trunk kidney, and head kidney) and plasma were determined. Transferrin (iron transporter) and TfR (I and II) genes were generally highly expressed in fish fed the basal diet compared to those fed the iron-supplemented diets. In contrast, ferritin (iron storage) genes were more expressed in the trunk kidney of fish fed the iron-supplemented diets than in those fed the basal diet. Our results demonstrate that supplementing channel catfish plant-based diets with iron from either organic or inorganic iron sources affected the expression of the iron-regulatory genes and increased body iron status in the fish.</p>","PeriodicalId":15849,"journal":{"name":"Journal of fish diseases","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140579462","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Fredrik Strebel Skedsmo, Guro Løkka, Elvis Chikwati, Julianne Valla Jacobsen, Arild Espenes, Trond M. Kortner
During recent years, there has been a renewed interest in establishing farming of Atlantic cod (Gadus morhua) in Norway. However, a fatal abdominal disorder compromises animal welfare and causes economic losses. A similar problem was present during a previous attempt to establish Atlantic cod farming more than a decade ago. In this paper, we provide the first in-depth description of this intestinal disorder, which is correctly denoted ‘strangulating obstruction’. In affected fish, part of the intestine is permanently entrapped (incarcerated) under fibrous strands in the mesentery. The entrapment interferes with blood flow and physically blocks the intestine, causing a strangulating obstruction with severe venous congestion and ischemia of the intestinal wall. Furthermore, comparison of macroscopical and histological anatomy of farmed and wild Atlantic cod is presented and risk factors associated with the anatomical differences are discussed.
{"title":"Intestinal strangulation in farmed Atlantic cod (Gadus morhua): Pathological changes and possible predisposing anatomical features","authors":"Fredrik Strebel Skedsmo, Guro Løkka, Elvis Chikwati, Julianne Valla Jacobsen, Arild Espenes, Trond M. Kortner","doi":"10.1111/jfd.13955","DOIUrl":"10.1111/jfd.13955","url":null,"abstract":"<p>During recent years, there has been a renewed interest in establishing farming of Atlantic cod (<i>Gadus morhua</i>) in Norway. However, a fatal abdominal disorder compromises animal welfare and causes economic losses. A similar problem was present during a previous attempt to establish Atlantic cod farming more than a decade ago. In this paper, we provide the first in-depth description of this intestinal disorder, which is correctly denoted ‘strangulating obstruction’. In affected fish, part of the intestine is permanently entrapped (incarcerated) under fibrous strands in the mesentery. The entrapment interferes with blood flow and physically blocks the intestine, causing a strangulating obstruction with severe venous congestion and ischemia of the intestinal wall. Furthermore, comparison of macroscopical and histological anatomy of farmed and wild Atlantic cod is presented and risk factors associated with the anatomical differences are discussed.</p>","PeriodicalId":15849,"journal":{"name":"Journal of fish diseases","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jfd.13955","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140579476","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Márton Hoitsy, György Hoitsy, János Gál, Árisz Ziszisz, Tamás Tóth, Endre Sós, Viktória Sós-Koroknai, Csaba Jakab, Örs Petneházy, Tamás Donkó, Tamás Molnár, Miklós Marosán
Diagnostic imaging techniques provide a new aspect of the ante-mortem and post-mortem diagnostics in fish medicine. Ultrasonography, computed tomography (CT) and magnetic resonance imaging (MRI) can provide more information about the internal organs and pathognomic lesions. The authors used diagnostic imaging techniques to evaluate and describe the neoplastic malformation in a 3-year-old female rainbow trout (Oncorhynchus mykiss). The fish was examined with Siemens Somatom Definition AS + CT scanner and Siemens Biograph mMR scanner. The animal was lethargic and showed anorectic signs and muscular dystrophy. During the post-mortem investigation, histopathology and immunohistochemistry were also performed allowing us to identify the neoplasms. The results showed a large soft tissue mass in the first mid-intestine segment, which proved to be an adenocarcinoma. This subsequently led to digestion problems and absorption disorders. Immunohistochemically, neoplastic cells of carcinoma revealed E-cadherin and pancytokeratin positivity. This is the first study to report the use of MRI and CT for studying gastrointestinal adenocarcinoma in rainbow trout.
{"title":"Rainbow trout (Oncorhynchus mykiss, Walbaum 1792) adenocarcinoma investigation with various diagnostic imaging techniques","authors":"Márton Hoitsy, György Hoitsy, János Gál, Árisz Ziszisz, Tamás Tóth, Endre Sós, Viktória Sós-Koroknai, Csaba Jakab, Örs Petneházy, Tamás Donkó, Tamás Molnár, Miklós Marosán","doi":"10.1111/jfd.13951","DOIUrl":"10.1111/jfd.13951","url":null,"abstract":"<p>Diagnostic imaging techniques provide a new aspect of the <i>ante-mortem</i> and post-mortem diagnostics in fish medicine. Ultrasonography, computed tomography (CT) and magnetic resonance imaging (MRI) can provide more information about the internal organs and pathognomic lesions. The authors used diagnostic imaging techniques to evaluate and describe the neoplastic malformation in a 3-year-old female rainbow trout (<i>Oncorhynchus mykiss</i>). The fish was examined with Siemens Somatom Definition AS + CT scanner and Siemens Biograph mMR scanner. The animal was lethargic and showed anorectic signs and muscular dystrophy. During the post-mortem investigation, histopathology and immunohistochemistry were also performed allowing us to identify the neoplasms. The results showed a large soft tissue mass in the first mid-intestine segment, which proved to be an adenocarcinoma. This subsequently led to digestion problems and absorption disorders. Immunohistochemically, neoplastic cells of carcinoma revealed E-cadherin and pancytokeratin positivity. This is the first study to report the use of MRI and CT for studying gastrointestinal adenocarcinoma in rainbow trout.</p>","PeriodicalId":15849,"journal":{"name":"Journal of fish diseases","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2024-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jfd.13951","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140579353","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}