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Monteiro Belo Santos S, Corion M, De Ketelaere B, Lammertyn J, Spasic D. Allantoic Fluid-Based qPCR for Early Onset In Ovo Sexing. J Agric Food Chem 2024. [PMID: 38613504 DOI: 10.1021/acs.jafc.3c09418] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/15/2024]
Abstract
The day-old male chick culling remains a welfare issue in the poultry industry. Several governments have prohibited this practice, pushing hatcheries to seek alternatives. Although different solutions exist for solving this problem, sex determination during the embryo's incubation (in ovo sexing) is considered the most suitable one among the consumers and industry. However, to be industrialized, in ovo sexing technologies must meet several requirements: compatibility with all egg colors and early developmental stages while maintaining a high hatchability rate and accuracy at low cost and high throughput. To meet these requirements, we studied the use of the sexual genes HINTW (female-specific) and DMRT-1 (both sexes) at incubation days 6-9. By utilizing the quantitative polymerase chain reaction in allantoic fluid (AF) samples, our study confirmed female-specific HINTW detection on all days without any significant detrimental effects on embryo development. We achieved 95% sexing accuracy using the HINTW cycle threshold (Ct) alone and 100% accuracy rate when using Δλ values (difference between the HINTW and DMRT-1 Ct). In conclusion, the developed assay can provide information about AF as a sample for in ovo sexing and open new industrial possibilities for faster and cheaper assays.
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Affiliation(s)
| | - Matthias Corion
- Department of Biosystems─Biosensors Group, KU Leuven, Willem de Croylaan 42, B-3001 Leuven, Belgium
| | - Bart De Ketelaere
- Department of Biosystems─Biosensors Group, KU Leuven, Willem de Croylaan 42, B-3001 Leuven, Belgium
| | - Jeroen Lammertyn
- Department of Biosystems─Biosensors Group, KU Leuven, Willem de Croylaan 42, B-3001 Leuven, Belgium
| | - Dragana Spasic
- Department of Biosystems─Biosensors Group, KU Leuven, Willem de Croylaan 42, B-3001 Leuven, Belgium
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Tagliatti V, Descamps C, Lefèvre M, Colet JM. Predicting Valproate-Induced Liver Injury Using Metabolomic Analysis of Ex Ovo Chick Embryo Allantoic Fluid. Metabolites 2023; 13:721. [PMID: 37367880 DOI: 10.3390/metabo13060721] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2023] [Revised: 05/26/2023] [Accepted: 05/29/2023] [Indexed: 06/28/2023] Open
Abstract
The use of sensitive animals in toxicological studies tends to be limited. Even though cell culture is an attractive alternative, it has some limitations. Therefore, we investigated the potential of the metabolomic profiling of the allantoic fluid (AF) from ex ovo chick embryos to predict the hepatotoxicity of valproate (VPA). To this end, the metabolic changes occurring during embryo development and following exposure to VPA were assessed using 1H-NMR spectroscopy. During embryonic development, our findings indicated a metabolism progressively moving from anaerobic to aerobic, mainly based on lipids as the energy source. Next, liver histopathology of VPA-exposed embryos revealed abundant microvesicles indicative of steatosis and was metabolically confirmed via the determination of lipid accumulation in AF. VPA-induced hepatotoxicity was further demonstrated by (i) lower glutamine levels, precursors of glutathione, and decreased β-hydroxybutyrate, an endogenous antioxidant; (ii) changes in lysine levels, a precursor of carnitine, which is essential in the transport of fatty acids to the mitochondria and whose synthesis is known to be reduced by VPA; and (iii) choline accumulation that promotes the export of hepatic triglycerides. In conclusion, our results support the use of the ex ovo chick embryo model combined with the metabolomic assessment of AF to rapidly predict drug-induced hepatotoxicity.
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Affiliation(s)
- Vanessa Tagliatti
- Laboratory of Human Biology & Toxicology, Faculty of Medicine and Pharmacy, University of Mons, 7000 Mons, Belgium
| | - Caroline Descamps
- Laboratory of Human Biology & Toxicology, Faculty of Medicine and Pharmacy, University of Mons, 7000 Mons, Belgium
| | - Margaux Lefèvre
- Laboratory of Human Biology & Toxicology, Faculty of Medicine and Pharmacy, University of Mons, 7000 Mons, Belgium
| | - Jean-Marie Colet
- Laboratory of Human Biology & Toxicology, Faculty of Medicine and Pharmacy, University of Mons, 7000 Mons, Belgium
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3
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Menezes ACB, McCarthy KL, Kassetas CJ, Baumgaertner F, Kirsch JD, Dorsam S, Neville TL, Ward AK, Borowicz PP, Reynolds LP, Sedivec KK, Forcherio JC, Scott R, Caton JS, Dahlen CR. Vitamin and mineral supplementation and rate of gain during the first trimester of gestation affect concentrations of amino acids in maternal serum and allantoic fluid of beef heifers. J Anim Sci 2021; 99:6119706. [PMID: 33493276 DOI: 10.1093/jas/skab024] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Accepted: 01/22/2021] [Indexed: 12/13/2022] Open
Abstract
The objective of this study was to evaluate the effects of feeding vitamin and mineral (VTM) supplement and (or) rate of gain (GAIN) during early gestation on amino acid (AA) concentrations in allantoic fluid (ALF) and amniotic fluid (AMF) and maternal serum. Seventy-two crossbred Angus heifers (initial BW = 359.5 ± 7.1 kg) were randomly assigned to one of four treatments in a 2 × 2 factorial arrangement with main effects of VTM supplement (VTM or NoVTM) and rate of gain (GAIN; low gain [LG], 0.28 kg/d, vs. moderate gain [MG], 0.79 kg/d). The VTM treatment (113 g•heifer-1•d-1, provided macro and trace minerals and vitamins A, D, and E to meet 110% of the requirements specified by the NASEM in Nutrient requirements of beef cattle. Washington, DC: The National Academies Press. doi:10.17226/19014, 2016) was initiated 71 to 148 d before artificial insemination (AI). To complete the factorial arrangement of treatments, at breeding heifers were either maintained on the basal diet (LG), or received MG diet which was implemented by adding a protein/energy supplement to the LG diet. Thirty-five gestating heifers with female fetuses were ovariohysterectomized on d 83 of gestation and maternal serum, ALF, and AMF were collected. Samples were analyzed for concentrations of neutral AA: Ala, Asn, Cys, Gln, Gly, Ile, Leu, Met, Phe, Pro, Ser, Thr, Trp, Tyr, and Val; cationic AA: Arg, His, and Lys; and anionic AA: Asp and Glu. In serum, a VTM × GAIN interaction (P = 0.02) was observed for Glu, with greater concentrations for VTM-LG than VTM-MG. Concentrations of serum Cys, Met, and Trp were greater (P ≤ 0.03) for MG than LG. In ALF, concentrations of Glu were affected by a VTM × GAIN interaction, where VTM-MG was greater (P < 0.01) than all other treatments. Further, ALF from VTM had increased (P ≤ 0.05) concentrations of His, Asp, and 12 of the 14 neutral AA; whereas GAIN affected concentrations of Arg, Cys, and Asp, with greater concentrations (P ≤ 0.05) in MG heifers. In AMF, AA concentrations were not affected (P ≥ 0.10) by VTM, GAIN, or their interaction. In conclusion, increased concentrations of AA in maternal serum and ALF of beef heifers were observed at d 83 of gestation in response to VTM supplementation and rate of gain of 0.79 kg/d, which raises important questions regarding the mechanisms responsible for AA uptake and balance between the maternal circulation and fetal fluid compartments.
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Affiliation(s)
- Ana Clara B Menezes
- Department of Animal Sciences, Center for Nutrition and Pregnancy, North Dakota State University, Fargo, ND, USA
| | - Kacie L McCarthy
- Department of Animal Sciences, University of Nebraska-Lincoln, Lincoln, NE, USA
| | - Cierrah J Kassetas
- Department of Animal Sciences, Center for Nutrition and Pregnancy, North Dakota State University, Fargo, ND, USA
| | - Friederike Baumgaertner
- Department of Animal Sciences, Center for Nutrition and Pregnancy, North Dakota State University, Fargo, ND, USA
| | - James D Kirsch
- Department of Animal Sciences, Center for Nutrition and Pregnancy, North Dakota State University, Fargo, ND, USA
| | - Sheri Dorsam
- Department of Animal Sciences, Center for Nutrition and Pregnancy, North Dakota State University, Fargo, ND, USA
| | - Tammi L Neville
- Department of Animal Sciences, Center for Nutrition and Pregnancy, North Dakota State University, Fargo, ND, USA
| | - Alison K Ward
- Department of Animal Sciences, Center for Nutrition and Pregnancy, North Dakota State University, Fargo, ND, USA
| | - Pawel P Borowicz
- Department of Animal Sciences, Center for Nutrition and Pregnancy, North Dakota State University, Fargo, ND, USA
| | - Lawrence P Reynolds
- Department of Animal Sciences, Center for Nutrition and Pregnancy, North Dakota State University, Fargo, ND, USA
| | - Kevin K Sedivec
- Central Grasslands Research Extension Center, North Dakota State University, Streeter, ND, USA
| | | | - Ronald Scott
- Purina Animal Nutrition LLC, Gray Summit, MO, USA
| | - Joel S Caton
- Department of Animal Sciences, Center for Nutrition and Pregnancy, North Dakota State University, Fargo, ND, USA
| | - Carl R Dahlen
- Department of Animal Sciences, Center for Nutrition and Pregnancy, North Dakota State University, Fargo, ND, USA
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Menezes ACB, McCarthy KL, Kassetas CJ, Baumgaertner F, Kirsch JD, Dorsam S, Neville TL, Ward AK, Borowicz PP, Reynolds LP, Sedivec KK, Forcherio JC, Scott R, Caton JS, Dahlen CR. Vitamin and mineral supplementation and rate of gain during the first trimester of gestation affect concentrations of amino acids in maternal serum and allantoic fluid of beef heifers. J Anim Sci 2021. [PMID: 33493276 DOI: 10.17226/19014] [Citation(s) in RCA: 98] [Impact Index Per Article: 32.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
The objective of this study was to evaluate the effects of feeding vitamin and mineral (VTM) supplement and (or) rate of gain (GAIN) during early gestation on amino acid (AA) concentrations in allantoic fluid (ALF) and amniotic fluid (AMF) and maternal serum. Seventy-two crossbred Angus heifers (initial BW = 359.5 ± 7.1 kg) were randomly assigned to one of four treatments in a 2 × 2 factorial arrangement with main effects of VTM supplement (VTM or NoVTM) and rate of gain (GAIN; low gain [LG], 0.28 kg/d, vs. moderate gain [MG], 0.79 kg/d). The VTM treatment (113 g•heifer-1•d-1, provided macro and trace minerals and vitamins A, D, and E to meet 110% of the requirements specified by the NASEM in Nutrient requirements of beef cattle. Washington, DC: The National Academies Press. doi:10.17226/19014, 2016) was initiated 71 to 148 d before artificial insemination (AI). To complete the factorial arrangement of treatments, at breeding heifers were either maintained on the basal diet (LG), or received MG diet which was implemented by adding a protein/energy supplement to the LG diet. Thirty-five gestating heifers with female fetuses were ovariohysterectomized on d 83 of gestation and maternal serum, ALF, and AMF were collected. Samples were analyzed for concentrations of neutral AA: Ala, Asn, Cys, Gln, Gly, Ile, Leu, Met, Phe, Pro, Ser, Thr, Trp, Tyr, and Val; cationic AA: Arg, His, and Lys; and anionic AA: Asp and Glu. In serum, a VTM × GAIN interaction (P = 0.02) was observed for Glu, with greater concentrations for VTM-LG than VTM-MG. Concentrations of serum Cys, Met, and Trp were greater (P ≤ 0.03) for MG than LG. In ALF, concentrations of Glu were affected by a VTM × GAIN interaction, where VTM-MG was greater (P < 0.01) than all other treatments. Further, ALF from VTM had increased (P ≤ 0.05) concentrations of His, Asp, and 12 of the 14 neutral AA; whereas GAIN affected concentrations of Arg, Cys, and Asp, with greater concentrations (P ≤ 0.05) in MG heifers. In AMF, AA concentrations were not affected (P ≥ 0.10) by VTM, GAIN, or their interaction. In conclusion, increased concentrations of AA in maternal serum and ALF of beef heifers were observed at d 83 of gestation in response to VTM supplementation and rate of gain of 0.79 kg/d, which raises important questions regarding the mechanisms responsible for AA uptake and balance between the maternal circulation and fetal fluid compartments.
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Affiliation(s)
- Ana Clara B Menezes
- Department of Animal Sciences, Center for Nutrition and Pregnancy, North Dakota State University, Fargo, ND, USA
| | - Kacie L McCarthy
- Department of Animal Sciences, University of Nebraska-Lincoln, Lincoln, NE, USA
| | - Cierrah J Kassetas
- Department of Animal Sciences, Center for Nutrition and Pregnancy, North Dakota State University, Fargo, ND, USA
| | - Friederike Baumgaertner
- Department of Animal Sciences, Center for Nutrition and Pregnancy, North Dakota State University, Fargo, ND, USA
| | - James D Kirsch
- Department of Animal Sciences, Center for Nutrition and Pregnancy, North Dakota State University, Fargo, ND, USA
| | - Sheri Dorsam
- Department of Animal Sciences, Center for Nutrition and Pregnancy, North Dakota State University, Fargo, ND, USA
| | - Tammi L Neville
- Department of Animal Sciences, Center for Nutrition and Pregnancy, North Dakota State University, Fargo, ND, USA
| | - Alison K Ward
- Department of Animal Sciences, Center for Nutrition and Pregnancy, North Dakota State University, Fargo, ND, USA
| | - Pawel P Borowicz
- Department of Animal Sciences, Center for Nutrition and Pregnancy, North Dakota State University, Fargo, ND, USA
| | - Lawrence P Reynolds
- Department of Animal Sciences, Center for Nutrition and Pregnancy, North Dakota State University, Fargo, ND, USA
| | - Kevin K Sedivec
- Central Grasslands Research Extension Center, North Dakota State University, Streeter, ND, USA
| | | | - Ronald Scott
- Purina Animal Nutrition LLC, Gray Summit, MO, USA
| | - Joel S Caton
- Department of Animal Sciences, Center for Nutrition and Pregnancy, North Dakota State University, Fargo, ND, USA
| | - Carl R Dahlen
- Department of Animal Sciences, Center for Nutrition and Pregnancy, North Dakota State University, Fargo, ND, USA
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5
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Tal S, Bar-Gal GK, Arlt SP. Evaluation of short-term safety of ultrasound-guided foetal fluid sampling in the dog (Canis lupus familiaris). Vet Rec 2021; 188:e31. [PMID: 33835567 DOI: 10.1002/vetr.31] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2019] [Revised: 09/28/2020] [Accepted: 11/06/2020] [Indexed: 11/07/2022]
Abstract
BACKGROUND In humans, analysis of amniotic fluid is widely used for diagnostic and prognostic purposes. Amniocentesis has scarcely been used in veterinary medicine to date, despite a tremendous potential for clinical and research applications in dogs. Our study aimed to establish a safe method for foetal fluid sampling in female dogs. METHODS Two transabdominal ultrasound-guided methods were assessed: the "free hand" and the needle-guided bracket sampling. In addition, through a subsequent routinely scheduled ovariohysterectomy, fluid was directly collected. Samples from 98 conceptuses were collected at day 46.7 ± 7.5 of pregnancy. RESULTS The amount of fluid retrieved varied between 0.5 and 5.0 ml per collection. Macroscopic examination of the uterus and conceptuses identified 53% of the puncture sites. Neither fluid leakage nor foetal injury was detected, and six hematomas (5.8%) were visible. Ultrasound-guided foetal fluid collection was found to be potentially safe, and it can be performed by using either transabdominal method. CONCLUSION Foetal fluid collection is possible with relative ease and low short-term risk, and may open paths for diagnostic, therapeutic and research purposes in dogs. The procedure can provide new insights into prenatal clinical medicine, including diagnostics of foetal deaths, early identification of heritable diseases and so on.
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Affiliation(s)
- Smadar Tal
- Koret School of Veterinary Medicine, The Hebrew University of Jerusalem, Rehovot, Israel
| | - Gila Kahila Bar-Gal
- Koret School of Veterinary Medicine, The Hebrew University of Jerusalem, Rehovot, Israel
| | - Sebastian Patrick Arlt
- Clinic for Animal Reproduction, Faculty of Veterinary Medicine, Freie Universität Berlin, Berlin, Germany
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6
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Ao Z, Wu X, Zhou J, Gu T, Wang X, Shi J, Zhao C, Cai G, Zheng E, Liu D, Wu Z, Li Z. Cloned pig fetuses exhibit fatty acid deficiency from impaired placental transport. Mol Reprod Dev 2019; 86:1569-1581. [PMID: 31347235 DOI: 10.1002/mrd.23242] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2019] [Accepted: 07/08/2019] [Indexed: 01/23/2023]
Abstract
Cloned pig fetuses produced by somatic cell nuclear transfer show a high incidence of erroneous development in the uteri of surrogate mothers. The mechanisms underlying the abnormal intrauterine development of cloned pig fetuses are poorly understood. This study aimed to explore the potential causes of the aberrant development of cloned pig fetuses. The levels of numerous fatty acids in allantoic fluid and muscle tissue were lower in cloned pig fetuses than in artificial insemination-generated pig fetuses, thereby suggesting that cloned pig fetuses underwent fatty acid deficiency. Cloned pig fetuses also displayed trophoblast hypoplasia and a reduced expression of placental fatty acid transport protein 4 (FATP4), which is the predominant FATP family member expressed in porcine placentas. This result suggested that the placental fatty acid transport functions were impaired in cloned pig fetuses, possibly causing fatty acid deficiency in cloned pig fetuses. The present study provides useful information in elucidating the mechanisms underlying the abnormal development of cloned pig fetuses.
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Affiliation(s)
- Zheng Ao
- National Engineering Research Center for Breeding Swine Industry, College of Animal Science, South China Agricultural University, Guangzhou, Guangdong, China.,Guangdong Provincial Key Laboratory of Agro-animal Genomics and Molecular Breeding, College of Animal Science, South China Agricultural University, Guangzhou, Guangdong, China
| | - Xiao Wu
- National Engineering Research Center for Breeding Swine Industry, College of Animal Science, South China Agricultural University, Guangzhou, Guangdong, China.,Guangdong Provincial Key Laboratory of Agro-animal Genomics and Molecular Breeding, College of Animal Science, South China Agricultural University, Guangzhou, Guangdong, China
| | - Jun Zhou
- National Engineering Research Center for Breeding Swine Industry, College of Animal Science, South China Agricultural University, Guangzhou, Guangdong, China.,Guangdong Provincial Key Laboratory of Agro-animal Genomics and Molecular Breeding, College of Animal Science, South China Agricultural University, Guangzhou, Guangdong, China
| | - Ting Gu
- National Engineering Research Center for Breeding Swine Industry, College of Animal Science, South China Agricultural University, Guangzhou, Guangdong, China.,Guangdong Provincial Key Laboratory of Agro-animal Genomics and Molecular Breeding, College of Animal Science, South China Agricultural University, Guangzhou, Guangdong, China
| | - Xingwang Wang
- National Engineering Research Center for Breeding Swine Industry, College of Animal Science, South China Agricultural University, Guangzhou, Guangdong, China.,Guangdong Provincial Key Laboratory of Agro-animal Genomics and Molecular Breeding, College of Animal Science, South China Agricultural University, Guangzhou, Guangdong, China
| | - Junsong Shi
- Guangdong Wens Pig Breeding Technology Co. Ltd., Wens Foodstuff Group Co. Ltd., Yunfu, Guangdong, China
| | - Chengfa Zhao
- National Engineering Research Center for Breeding Swine Industry, College of Animal Science, South China Agricultural University, Guangzhou, Guangdong, China.,Guangdong Provincial Key Laboratory of Agro-animal Genomics and Molecular Breeding, College of Animal Science, South China Agricultural University, Guangzhou, Guangdong, China
| | - Gengyuan Cai
- National Engineering Research Center for Breeding Swine Industry, College of Animal Science, South China Agricultural University, Guangzhou, Guangdong, China.,Guangdong Provincial Key Laboratory of Agro-animal Genomics and Molecular Breeding, College of Animal Science, South China Agricultural University, Guangzhou, Guangdong, China
| | - Enqin Zheng
- National Engineering Research Center for Breeding Swine Industry, College of Animal Science, South China Agricultural University, Guangzhou, Guangdong, China.,Guangdong Provincial Key Laboratory of Agro-animal Genomics and Molecular Breeding, College of Animal Science, South China Agricultural University, Guangzhou, Guangdong, China
| | - Dewu Liu
- National Engineering Research Center for Breeding Swine Industry, College of Animal Science, South China Agricultural University, Guangzhou, Guangdong, China.,Guangdong Provincial Key Laboratory of Agro-animal Genomics and Molecular Breeding, College of Animal Science, South China Agricultural University, Guangzhou, Guangdong, China
| | - Zhenfang Wu
- National Engineering Research Center for Breeding Swine Industry, College of Animal Science, South China Agricultural University, Guangzhou, Guangdong, China.,Guangdong Provincial Key Laboratory of Agro-animal Genomics and Molecular Breeding, College of Animal Science, South China Agricultural University, Guangzhou, Guangdong, China
| | - Zicong Li
- National Engineering Research Center for Breeding Swine Industry, College of Animal Science, South China Agricultural University, Guangzhou, Guangdong, China.,Guangdong Provincial Key Laboratory of Agro-animal Genomics and Molecular Breeding, College of Animal Science, South China Agricultural University, Guangzhou, Guangdong, China
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Manswr B, Ball C, Forrester A, Chantrey J, Ganapathy K. Evaluation of full S1 gene sequencing of classical and variant infectious bronchitis viruses extracted from allantoic fluid and FTA cards. Avian Pathol 2018; 47:418-426. [PMID: 29712443 DOI: 10.1080/03079457.2018.1471196] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
Sequence variability in the S1 gene determines the genotype of infectious bronchitis virus (IBV) strains. A single RT-PCR assay was developed to amplify and sequence the full S1 gene for six classical and variant IBVs (M41, D274, 793B, IS/885/00, IS/1494/06 and Q1) enriched in allantoic fluid (AF) or the same AF inoculated onto Flinders Technology Association (FTA) cards. Representative strains from each genotype were grown in specific-pathogen-free eggs and RNA was extracted from AF. Full S1 gene amplification was achieved using primer A and primer 22.51. Products were sequenced using primers A, 1050+, 1380+ and SX3+ to obtain short sequences covering the full gene. Following serial dilutions of AF, detection limits of the partial assay were higher than those of the full S1 gene. Partial S1 sequences exhibited higher-than-average nucleotide similarity percentages (79%; 352 bp) compared to full S1 sequences (77%; 1756 bp), suggesting that full S1 analysis allows greater strain differentiation. For IBV detection from AF-inoculated FTA cards, four serotypes were incubated for up to 21 days at three temperatures, 4°C, room temperature (approximately 24°C) and 40°C. RNA was extracted and tested with partial and full S1 protocols. Through partial sequencing, all IBVs were successfully detected at all sampling points and storage temperatures. In contrast, using full S1 sequencing it was not possible to amplify the gene beyond 14 days or when stored at 40°C. Data presented show that for full S1 sequencing, a substantial amount of RNA is needed. Field samples collected onto FTA cards are unlikely to yield such quantity or quality. ABBREVIATIONS AF: allantoic fluid; CD50: ciliostatic dose 50; FTA: Flinders Technology Association; IB: infectious bronchitis; IBV: infectious bronchitis virus.
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Affiliation(s)
- Basim Manswr
- a Institute of Infection and Global Health , University of Liverpool , Cheshire , UK.,b Faculty of Veterinary Medicine , Diyala University , Baqubah , Iraq
| | - Christopher Ball
- a Institute of Infection and Global Health , University of Liverpool , Cheshire , UK
| | - Anne Forrester
- a Institute of Infection and Global Health , University of Liverpool , Cheshire , UK
| | - Julian Chantrey
- c Institute of Veterinary Science , University of Liverpool , Cheshire , UK
| | - Kannan Ganapathy
- a Institute of Infection and Global Health , University of Liverpool , Cheshire , UK
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8
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Da Silva M, Labas V, Nys Y, Réhault-Godbert S. Investigating proteins and proteases composing amniotic and allantoic fluids during chicken embryonic development. Poult Sci 2018; 96:2931-2941. [PMID: 28379482 DOI: 10.3382/ps/pex058] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2016] [Accepted: 03/01/2017] [Indexed: 01/03/2023] Open
Abstract
In amniotes, the amniotic fluid is a significant contributor to fetal development and health. While numerous studies have been conducted in mammalian amniotic fluid, the composition of amniotic and other extraembryonic fluids in avian egg along with their physiological functions remain largely unexplored. In such a context, our objective was to characterize the chicken amniotic fluid (AmF) and allantoic fluid (AlF) properties, protein composition, and some associated functions from day 8 to day 16 of incubation. SDS-PAGE combined to mass spectrometry analysis revealed common and specific proteins to each fluid, suggesting distinct properties and functions. Indeed, major AlF proteins are mostly "egg yolk" proteins involved in lipid, vitamin metabolisms, and metal ion transport, while major AmF proteins resemble those of albumen. Drastic changes in the AmF protein profiles were observed during incubation, when the albumen transfers from day 12 onwards, while few changes were detected for the AlF protein profile. The decreases in osmolality (from 231 to 183 mOsm/kg) and pH (from 8.26 to 7.26) observed in the AlF during incubation are associated with water and electrolytes reallocation for the embryo needs. In contrast, AmF pH value remained stable (≈7.5). Active proteolytic enzymes have been identified in the 2 fluids using gelatin zymography, followed by mass spectrometry analysis for protease identification. A total of 12 proteases was detected in the AlF, compared to 5 in the AmF. We have shown that AlF concentrates proteolytic enzymes assumed to participate in digestive processes: aminopeptidase N, dipeptidyl peptidase-4, meprin A, and 72 kDa type IV collagenase preproprotein. The other proteases identified in both fluids also could have a role in morphogenesis (hepatocyte growth factor activator, suppressor of tumorigenicity 14, astacin-like metalloendopeptidase) and hemostasis (prothrombin and coagulation factor X). Altogether, these data suggest that the roles of chicken AlF and AmF are not merely associated with protection of the embryo and regulation of metabolic disposable wastes, but also they could have more sophisticated roles during embryonic development.
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Affiliation(s)
| | - V Labas
- PRC, CNRS, IFCE, INRA, University of Tours, 37380, Nouzilly, France
| | - Y Nys
- URA, INRA, 37380, Nouzilly, France
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9
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Okoh OO, Obiiyeke GE, Nwodo UU, Okoh AI. Ethanol extract and chromatographic fractions of Tamarindus indica stem bark inhibits Newcastle disease virus replication. Pharm Biol 2017; 55:1806-1808. [PMID: 28539068 PMCID: PMC6130528 DOI: 10.1080/13880209.2017.1331364] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2016] [Revised: 03/05/2017] [Accepted: 05/12/2017] [Indexed: 06/07/2023]
Abstract
CONTEXT The plethora of ethnomedicinal applications of Tamarindus indica Linn. (Leguminosae), tamarind, includes treatment of human and livestock ailments; preparations are recognized antipyretics in fevers, laxatives and carminatives. African folklore has various applications of tamarind. However, in Nyasaland, domestic fowl are fed with preparations for prophylactic properties. OBJECTIVES The objective of this study is to evaluate the antiviral properties of T. indica extract. MATERIALS AND METHODS Tamarindus indica stem bark was extracted through ethanol maceration over 24 h, and the crude extract was fractionated by gravity-propelled column chromatography. Newcastle disease virus (NDV) inhibitory activity of extract and fractions were evaluated in vivo using 10-d-old embryonated chicken egg (ECE) as the medium for virus cultivation and antivirus assay. About 240 ECE were grouped into eight (three controls and five experimental) and, 200 μL of the extract and fractions respectively inoculated into NDV pre-infected eggs and incubated at 37 °C. Allantoic fluid was harvested 5 d post-virus infection and assayed for haemagglutination (HA). RESULTS Anti-NDV assessment showed 62.5 mg/mL of crude extract and fractions: TiA, TiC and TiD to yield a HA titre of 1:128 each, while TiB showed 1:64 HA titre. At 125 mg/mL, a titre of 1:16 was recorded against TiB and TiD and, 1:8 against TiA. Similarly, crude extract and TiC, each recorded 1:4 HA titre. However, the minimum concentrations of extract and fraction for virus inactivation were 0.24 mg/mL and 0.49 mg/mL, respectively. CONCLUSION The antiviral activity shown by T. indica portends novel antiviral drugs and, perhaps, as scaffold for new drugs.
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Affiliation(s)
- Omobola O. Okoh
- SAMRC Microbial Water Quality Monitoring Centre, University of Fort Hare, Alice, South Africa
- Department of Chemistry, University of Fort Hare, Alice, South Africa
| | - Grace E. Obiiyeke
- Department of Botany, Delta State University, Abraka, Delta State, Nigeria
| | - Uchechukwu U. Nwodo
- SAMRC Microbial Water Quality Monitoring Centre, University of Fort Hare, Alice, South Africa
- Applied and Environmental Microbiology Research Group (AEMREG), Department of Biochemistry and Microbiology, University of Fort Hare, Alice, Eastern Cape, South Africa
| | - Anthony I. Okoh
- SAMRC Microbial Water Quality Monitoring Centre, University of Fort Hare, Alice, South Africa
- Applied and Environmental Microbiology Research Group (AEMREG), Department of Biochemistry and Microbiology, University of Fort Hare, Alice, Eastern Cape, South Africa
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Santry LA, McAusland TM, Susta L, Wood GA, Major PP, Petrik JJ, Bridle BW, Wootton SK. Production and Purification of High-Titer Newcastle Disease Virus for Use in Preclinical Mouse Models of Cancer. Mol Ther Methods Clin Dev 2017; 9:181-191. [PMID: 29556508 PMCID: PMC5854916 DOI: 10.1016/j.omtm.2017.10.004] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/14/2017] [Accepted: 10/12/2017] [Indexed: 12/12/2022]
Abstract
Newcastle disease virus (NDV) is a single-stranded, negative-sense RNA virus in the Paramyxoviridae family. Although primarily an avian pathogen, NDV is a potent oncolytic virus that has been shown to be safe and effective in a variety of preclinical cancer models and human clinical trials. To produce virus for oncolytic trials, NDV is commonly amplified in embryonated chicken eggs and purified from the allantoic fluid. Conventional methods for purifying virus from allantoic fluid often result in relatively low-titer preparations containing high levels of impurities, including immunogenic chicken host cell proteins from allantoic fluid. However, large quantities of virus need to be delivered intravenously to administer oncolytic NDV systemically to mice. This route of administration requires virus preparations that are both highly concentrated (to enable delivery of small volumes) and highly pure (to limit toxic effects from contaminants). Given the accumulation of promising preclinical and clinical data demonstrating the efficacy of NDV as an oncolytic agent, strategies for increasing the titer and purity of NDV preparations are sorely needed to allow for effective intravenous administration in mice. Here, we describe an optimized protocol for the rescue, production, and purification of high-titer in vivo-grade NDV for preclinical studies in mouse models.
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Affiliation(s)
- Lisa A Santry
- Department of Pathobiology, University of Guelph, Guelph, ON N1G 2W1, Canada
| | - Thomas M McAusland
- Department of Pathobiology, University of Guelph, Guelph, ON N1G 2W1, Canada
| | - Leonardo Susta
- Department of Pathobiology, University of Guelph, Guelph, ON N1G 2W1, Canada
| | - Geoffrey A Wood
- Department of Pathobiology, University of Guelph, Guelph, ON N1G 2W1, Canada
| | - Pierre P Major
- Juravinski Cancer Centre, 699 Concession Street, Hamilton, ON L8V 5C2, Canada
| | - Jim J Petrik
- Department of Biomedical Sciences, University of Guelph, Guelph, ON N1G 2W1, Canada
| | - Byram W Bridle
- Department of Pathobiology, University of Guelph, Guelph, ON N1G 2W1, Canada
| | - Sarah K Wootton
- Department of Pathobiology, University of Guelph, Guelph, ON N1G 2W1, Canada
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