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Zhang L, Hong Y, Sun K, Zhao S, Bai Y, Yang S, Tao J, Shi F, Zhan F, Lin L, Qin Z. Passive protection of chicken egg yolk immunoglobulin (IgY) against Streptococcus agalactiae infection in Nile tilapia (Oreochromis niloticus). FISH & SHELLFISH IMMUNOLOGY 2024:109923. [PMID: 39326687 DOI: 10.1016/j.fsi.2024.109923] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2024] [Revised: 09/23/2024] [Accepted: 09/24/2024] [Indexed: 09/28/2024]
Abstract
IgY is an immunoglobulin primarily found in the serum and egg yolk of birds, amphibians, and reptiles. Recent years, IgY is considered to have a good application prospect in the immunodiagnostics and passive immunotherapy of aquatic diseases. In this study, we prepared a specific IgY against Streptococcus agalactiae in tilapia after immunizing the hens for 4 times. The result of ELISA detection showed that the IgY titers in water-soluble fraction (WSF) after 6 weeks of immunization reached 1:51200 and last for 4 weeks. Western blot (WB) analysis data showed that the specific IgY could recognize the target band, the specific IgY showed a concentration-dependent inhibitory effect on the growth of S. agalactiae, altered cell wall structure and aggluted of S. agalactiae. The quantitative reverse transcription PCR (qRT-PCR) analysis data suggested that the specific IgY downregulated the expression of pro-inflammatory factors (IL-8, TNF-α), upregulated the anti-inflammatory factors (IL-10, TGF-β). In addition, the histopathological results showed that the specific IgY significantly decreased the pathological manifestations, dramatically improved the survival rates of tilapia in injection, feeding, and immersion experiments. Collectively, our findings demonstrated that the broad potential of specific IgY for the prevention and treatment of S. agalactiae infection in tilapia.
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Affiliation(s)
- Linpeng Zhang
- Guangdong Provincial Water Environment and Aquatic Products Security Engineering Technology Research Center, Guangzhou Key Laboratory of Aquatic Animal Diseases and Waterfowl Breeding, College of Animal Sciences and Technology, Zhongkai University of Agriculture and Engineering, Guangzhou, Guangdong, 510225, China
| | - Yucong Hong
- Guangdong Provincial Key Laboratory of Aquatic Larvae Feed, Guangdong Yuequn Ocean Biotechnology Co., Ltd, Jieyang, Guangdong, 515500
| | - Kaihui Sun
- Guangdong Provincial Key Laboratory of Aquatic Larvae Feed, Guangdong Yuequn Ocean Biotechnology Co., Ltd, Jieyang, Guangdong, 515500
| | - Shuyan Zhao
- Guangdong Provincial Key Laboratory of Aquatic Larvae Feed, Guangdong Yuequn Ocean Biotechnology Co., Ltd, Jieyang, Guangdong, 515500
| | - Yanhan Bai
- Guangdong Provincial Water Environment and Aquatic Products Security Engineering Technology Research Center, Guangzhou Key Laboratory of Aquatic Animal Diseases and Waterfowl Breeding, College of Animal Sciences and Technology, Zhongkai University of Agriculture and Engineering, Guangzhou, Guangdong, 510225, China
| | - Shiyi Yang
- Guangdong Provincial Water Environment and Aquatic Products Security Engineering Technology Research Center, Guangzhou Key Laboratory of Aquatic Animal Diseases and Waterfowl Breeding, College of Animal Sciences and Technology, Zhongkai University of Agriculture and Engineering, Guangzhou, Guangdong, 510225, China
| | - Junjie Tao
- Guangdong Provincial Water Environment and Aquatic Products Security Engineering Technology Research Center, Guangzhou Key Laboratory of Aquatic Animal Diseases and Waterfowl Breeding, College of Animal Sciences and Technology, Zhongkai University of Agriculture and Engineering, Guangzhou, Guangdong, 510225, China
| | - Fei Shi
- Guangdong Provincial Water Environment and Aquatic Products Security Engineering Technology Research Center, Guangzhou Key Laboratory of Aquatic Animal Diseases and Waterfowl Breeding, College of Animal Sciences and Technology, Zhongkai University of Agriculture and Engineering, Guangzhou, Guangdong, 510225, China
| | - Fanbin Zhan
- Guangdong Provincial Water Environment and Aquatic Products Security Engineering Technology Research Center, Guangzhou Key Laboratory of Aquatic Animal Diseases and Waterfowl Breeding, College of Animal Sciences and Technology, Zhongkai University of Agriculture and Engineering, Guangzhou, Guangdong, 510225, China
| | - Li Lin
- Guangdong Provincial Key Laboratory of Aquatic Larvae Feed, Guangdong Yuequn Ocean Biotechnology Co., Ltd, Jieyang, Guangdong, 515500; Guangdong Provincial Water Environment and Aquatic Products Security Engineering Technology Research Center, Guangzhou Key Laboratory of Aquatic Animal Diseases and Waterfowl Breeding, College of Animal Sciences and Technology, Zhongkai University of Agriculture and Engineering, Guangzhou, Guangdong, 510225, China.
| | - Zhendong Qin
- Guangdong Provincial Key Laboratory of Aquatic Larvae Feed, Guangdong Yuequn Ocean Biotechnology Co., Ltd, Jieyang, Guangdong, 515500; Guangdong Provincial Water Environment and Aquatic Products Security Engineering Technology Research Center, Guangzhou Key Laboratory of Aquatic Animal Diseases and Waterfowl Breeding, College of Animal Sciences and Technology, Zhongkai University of Agriculture and Engineering, Guangzhou, Guangdong, 510225, China.
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2
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Grzywa R, Łupicka-Słowik A, Sieńczyk M. IgYs: on her majesty's secret service. Front Immunol 2023; 14:1199427. [PMID: 37377972 PMCID: PMC10291628 DOI: 10.3389/fimmu.2023.1199427] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2023] [Accepted: 05/16/2023] [Indexed: 06/29/2023] Open
Abstract
There has been an increasing interest in using Immunoglobulin Y (IgY) antibodies as an alternative to "classical" antimicrobials. Unlike traditional antibiotics, they can be utilized on a continual basis without leading to the development of resistance. The veterinary IgY antibody market is growing because of the demand for minimal antibiotic use in animal production. IgY antibodies are not as strong as antibiotics for treating infections, but they work well as preventative agents and are natural, nontoxic, and easy to produce. They can be administered orally and are well tolerated, even by young animals. Unlike antibiotics, oral IgY supplements support the microbiome that plays a vital role in maintaining overall health, including immune system function. IgY formulations can be delivered as egg yolk powder and do not require extensive purification. Lipids in IgY supplements improve antibody stability in the digestive tract. Given this, using IgY antibodies as an alternative to antimicrobials has garnered interest. In this review, we will examine their antibacterial potential.
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Karthikeyan M, Indhuprakash ST, Gopal G, Ambi SV, Krishnan UM, Diraviyam T. Passive immunotherapy using chicken egg yolk antibody (IgY) against diarrheagenic E. coli: A systematic review and meta-analysis. Int Immunopharmacol 2021; 102:108381. [PMID: 34810126 DOI: 10.1016/j.intimp.2021.108381] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2021] [Revised: 10/25/2021] [Accepted: 11/15/2021] [Indexed: 11/19/2022]
Abstract
BACKGROUND Animal diarrhea due to diarrheagenic Escherichia coli (E. coli) has been a major concern in the field of livestock farming leading to a severe loss of domesticated animals. This systematic review aims to analyze medical shreds of evidence available in the literature and to discover the effect of IgY in treatment and protection against E. coli diarrhea. METHODS AND RESULTS Research reports that aimed to evaluate the effect of IgY against E. coli diarrhea were searched and collected from several databases (Science Direct, Springer link, Wiley, T&F). The collected studies were screened based on the inclusion criteria. 19 studies were identified and included in the meta-analysis. The pooled relative risk ratios were calculated for the studies and found to be statistically significant to support the therapeutic effect of IgY against E. coli diarrhea but the 95% confidence interval of a majority of studies includes a relative risk of 1. This variability between the effect of IgY in the overall estimate and individual studies accounts due to the presence of methodological heterogeneity. In addition, subgroup analysis revealed the grounds for heterogeneity. CONCLUSIONS This systematic review and meta-analysis provide concrete evidence for the favorable effect of IgY as a prophylactic and therapeutic modality against E. coli diarrhea. Yet, more research pieces of evidence with standardized animal studies aimed to utilize IgY against E. coli are vital. Further studies and trials on human subjects could open new perspectives in the application IgY as a therapeutic agent.
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Affiliation(s)
- Mukunthan Karthikeyan
- Department of Biotechnology, School of Chemical & Biotechnology, SASTRA Deemed-to-be-University, Thanjavur 613401, Tamil Nadu, India
| | - Srichandrasekar Thuthikkadu Indhuprakash
- Centre for Research in Infectious Diseases (CRID), Department of Bioengineering, School of Chemical & Biotechnology, SASTRA Deemed-to-be-University, Thanjavur 613401, Tamil Nadu, India
| | - Gayathri Gopal
- Centre for Research in Infectious Diseases (CRID), Department of Bioengineering, School of Chemical & Biotechnology, SASTRA Deemed-to-be-University, Thanjavur 613401, Tamil Nadu, India
| | - Senthil Visaga Ambi
- Centre for Research in Infectious Diseases (CRID), Department of Bioengineering, School of Chemical & Biotechnology, SASTRA Deemed-to-be-University, Thanjavur 613401, Tamil Nadu, India
| | - Uma Maheswari Krishnan
- Centre for Nanotechnology & Advanced Biomaterials (CeNTAB), School of Chemical & Biotechnology and School of Arts, Science & Humanities, SASTRA Deemed-to-be-University, Thanjavur 613401, Tamil Nadu, India
| | - Thirumalai Diraviyam
- Centre for Research in Infectious Diseases (CRID), Department of Bioengineering, School of Chemical & Biotechnology, SASTRA Deemed-to-be-University, Thanjavur 613401, Tamil Nadu, India.
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4
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Eto SF, Fernandes DC, Baldassi AC, Balbuena TS, da Costa Alecrim JV, Almeida de Carvalho FC, Lima C, Lopes-Ferreira M, Pizauro JM. Proteomic analysis capsule synthesis and redox mechanisms in the intracellular survival of group B Streptococcus in fish microglia. FISH & SHELLFISH IMMUNOLOGY 2021; 118:34-50. [PMID: 34464686 DOI: 10.1016/j.fsi.2021.08.019] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2021] [Revised: 06/20/2021] [Accepted: 08/18/2021] [Indexed: 06/13/2023]
Abstract
Group B Streptococcus (GBS) causes meningitis in neonates and Nile tilapia (Oreochromis niloticus). The molecular mechanisms regulating the intracellular survival of this pathogen in the host cell are complex and crucial for the progression of infection. Thus, we propose the use of GBS-infected Nile tilapia microglia as an in vitro model system simulating infection caused by homologous bacteria in humans. We used this model to evaluate the phagocytic activity, as well as the functional aspects of the capsular proteins A, B, C, and D and the major redox enzymes, and the synergistic role of mechanisms/proteins involved in blocking phagocytic process. We observed that in the intracellular phase, GBS showed enhanced synthesis of the polysaccharide capsule and used superoxide dismutase, thioredoxin, NADH oxidase, and alkyl hydroperoxide reductase to scavenge reactive oxygen species and reactive nitrogen species produced by the host cell. Furthermore, although these virulence mechanisms were effective during the initial hours of infection, they were not able to subvert microglial responses, which partially neutralized the infection. Altogether, our findings provided important information regarding the intracellular survival mechanisms of GBS and perspectives for the production of new drugs and vaccines, through the druggability analysis of specific proteins. In conclusion, tilapia microglia serve as a potent in vitro experimental model for the study of meningitis.
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Affiliation(s)
- Silas Fernandes Eto
- Department of Postgraduate in Health Sciences-PROCISA, Federal University of Roraima (UFRR), Boa Vista, 69310-000, Brazil.
| | - Dayanne Carla Fernandes
- Immunochemistry Laboratory, Butantan Institute, (CeTICs/FAPESP), Vital Brazil Avenue, 1500, Butantã, 05503-009, São Paulo, Brazil
| | - Amanda Cristina Baldassi
- Department of Technology, School of Agrarian and Veterinary Sciences, Sao Paulo State University (Unesp), Jaboticabal, 14884-900, Sao Paulo/ SP, Brazil
| | - Thiago Santana Balbuena
- Department of Technology, School of Agrarian and Veterinary Sciences, Sao Paulo State University (Unesp), Jaboticabal, 14884-900, Sao Paulo/ SP, Brazil
| | - João Victor da Costa Alecrim
- Department of Postgraduate in Health Sciences-PROCISA, Federal University of Roraima (UFRR), Boa Vista, 69310-000, Brazil
| | | | - Carla Lima
- Immunoregulation Unit of the Laboratory of Applied Toxinology (CeTICs/FAPESP), Butantan Institute, Vital Brazil Avenue, 1500, Butantã, 05503-009, São Paulo, Brazil
| | - Monica Lopes-Ferreira
- Immunoregulation Unit of the Laboratory of Applied Toxinology (CeTICs/FAPESP), Butantan Institute, Vital Brazil Avenue, 1500, Butantã, 05503-009, São Paulo, Brazil
| | - João Martins Pizauro
- Department of Technology, School of Agrarian and Veterinary Sciences, Sao Paulo State University (Unesp), Jaboticabal, 14884-900, Sao Paulo/ SP, Brazil
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5
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Toxicological exploration of peptide-based cationic liposomes in siRNA delivery. Colloids Surf B Biointerfaces 2019; 179:66-76. [PMID: 30947085 DOI: 10.1016/j.colsurfb.2019.03.052] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2018] [Revised: 03/05/2019] [Accepted: 03/24/2019] [Indexed: 01/22/2023]
Abstract
The toxicology of cationic liposomes was explored to advance clinical trials of liposome-mediated gene therapy through the analysis of a peptide cationic liposome with DOTAP as a positive control. We first investigated the delivery of luciferase siRNA by several peptide liposomes in mice bearing lung cancer A549 cell xenografts. Of these, a cationic liposome (CDO14) was selected for further investigation. CDO14 efficiently mediated IGF-1R-siRNA delivery and inhibited the growth of the A549 cell xenografts. The in vivo toxicity and toxicological mechanisms of the selected liposome were evaluated to assess its potential utility for gene delivery. Specifically, the effects of CDO14 on mouse body weight, hematology, urine, serum biochemical indices, and histopathology were measured in acute toxicity and subchronic toxicity tests. CDO14 showed limited toxicological effects at low dosages although it induced pulmonary inflammation and liver injury at higher dosages. The toxicity of CDO14 was lower than that of DOTAP, and the toxicity of CDO14 did not change when complexed with siRNA. The pulmonary inflammation induced by CDO14 occurred via expressional up-regulation of the pro-inflammatory cytokines TNF-α and IL-6, and expressional down-regulation of the anti-inflammatory cytokine IL-10. Liver injury induced by CDO14 was mediated by the JAK2-STAT3 signaling pathway. Lastly, CDO14 did not affect the expression of apoptosis-related proteins in normal liver cells, suggesting that it did not induce apoptosis of normal cells. The toxicological results demonstrate that peptide-based headgroups in lipids are superior to those with quaternary ammonium headgroups that are used as gene vectors for cancer therapy.
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6
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Lanzarini NM, Bentes GA, Volotão EDM, Pinto MA. Use of chicken immunoglobulin Y in general virology. J Immunoassay Immunochem 2018; 39:235-248. [DOI: 10.1080/15321819.2018.1500375] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Natália Maria Lanzarini
- Laboratório de Desenvolvimento Tecnológico em Virologia, Instituto Oswaldo Cruz, Fiocruz, Rio de Janeiro/RJ, Brazil
| | - Gentil Arthur Bentes
- Laboratório de Desenvolvimento Tecnológico em Virologia, Instituto Oswaldo Cruz, Fiocruz, Rio de Janeiro/RJ, Brazil
| | - Eduardo de Mello Volotão
- Laboratório de Desenvolvimento Tecnológico em Virologia, Instituto Oswaldo Cruz, Fiocruz, Rio de Janeiro/RJ, Brazil
| | - Marcelo Alves Pinto
- Laboratório de Desenvolvimento Tecnológico em Virologia, Instituto Oswaldo Cruz, Fiocruz, Rio de Janeiro/RJ, Brazil
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7
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Zhou X, Ma S. Anti-lipopolysaccharide egg yolk antibodies enhance the phagocytosis of mammalian phagocytes. Biol Open 2018; 7:bio.032821. [PMID: 29739752 PMCID: PMC6031336 DOI: 10.1242/bio.032821] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Macrophages play crucial roles in combatting infectious diseases by promoting inflammation and phagocytosis. The decline of macrophage phagocytic function will bring many serious consequences, including weakened pathogen clearance. As an avian antibody, immunoglobulin Y (IgY) has been widely used in preventing and treating infectious diseases, but whether it can enhance the phagocytic ability of mammalian macrophages in order to clear pathogens is still unknown. In this study, mouse peritoneal macrophages and THP-1 cells were cultured with anti-lipopolysaccharide (LPS) IgY in vivo or in vitro, respectively. Morphological observation, ELISA, fluorescence immunoassays and flow cytometry were used to study whether IgY could enhance phagocytosis of mammalian macrophages. It was found that without anti-LPS IgY, mouse peritoneal macrophages showed adherent growth with no differentiation and little pseudopod extension; but with anti-LPS IgY, peritoneal macrophages presented more significant characteristics in adherent growth, extension deformation and protruding pseudopods. With flow cytometry, the macrophages from mice injected with anti-LPS IgY exhibited a significantly higher percentage of phagocytosis and index (90.83±2.59% and 4.45±0.13 respectively) compared with phosphate buffered saline (PBS) groups (64.32±1.5%, and 2.36±0.11) and non-immunized groups (65.94%±1.4%, and 2.4±0.15). With phorbol-12-myristate-13-acetate (PMA)-induced THP-1 cells, similar results were found; the percentage and index were significantly higher, with larger body and more pseudopods, for THP-1 cells that were co-incubated with anti-LPS IgY (79.83±0.38% and 2.64±0.03), compared with cells that were co-incubated with PBS (68.07±0.52%, and 1.88±0.03) or non-immunized IgY (74.89±1.14% and 2.30±0.02). The results showed that anti-LPS IgY was effective in promoting the growth of macrophages, pseudopod extension and stronger phagocytic capacity. Our study indicated that anti-LPS IgY could enhance the phagocytic capacity of mammalian macrophages to internalize pathogens more effectively with larger body and more pseudopods. This may be important to encourage IgY to be used to prevent and treat infectious diseases.
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Affiliation(s)
- Xin Zhou
- Institute of Burn Research, State Key Laboratory of Trauma, Burns and Combined Injury, Third Military Medical University (Army Medical University), Chongqing 400038, China
| | - Siyuan Ma
- Institute of Burn Research, State Key Laboratory of Trauma, Burns and Combined Injury, Third Military Medical University (Army Medical University), Chongqing 400038, China
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8
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Eto SF, Fernandes DC, Moraes AC, Prado EJR, Baldassi AC, Manrique WG, Silva IC, Medeiros ASR, Belo MAA, Balbuena TS, Samara SI, Pizauro JM. Validation of IgY for the diagnosis of Streptococcus agalactiae-caused endocarditis and bacterial meningitis in Nile tilapia (Oreochromis niloticus). FISH & SHELLFISH IMMUNOLOGY 2018; 76:153-160. [PMID: 29501881 DOI: 10.1016/j.fsi.2018.02.048] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2018] [Revised: 02/27/2018] [Accepted: 02/28/2018] [Indexed: 06/08/2023]
Abstract
Streptococcus agalactiae (Sta), which belongs to Lancefield group B, causes sepsis, endocarditis and bacterial meningitis in human neonates and Nile tilapia. Because the pathophysiology of Sta infection is partially similar in both species, the identification of biomarkers for the diagnosis and study of this disease is of importance for human and animal health. Therefore, in the present study, we produced an immunoglobulin Y (IgY) by immunizing laying hens with Sta proteins and evaluated its ability to detect Sta in paraffinized tilapia brain and cardiac tissue by direct immunofluorescence (IMF) and indirect immunohistochemistry (IHC). The IgY produced was effective in the diagnosis of Sta infection in Nile tilapia, justifying the use of this species as a biomodel for the study of this disease.
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Affiliation(s)
- Silas F Eto
- Department of Technology, School of Agrarian and Veterinary Sciences, Sao Paulo State University (Unesp), Via Prof. Paulo Donato Castellane, km 05, Jaboticabal, Sao Paulo, Brazil.
| | - Dayanne C Fernandes
- Department of Technology, School of Agrarian and Veterinary Sciences, Sao Paulo State University (Unesp), Via Prof. Paulo Donato Castellane, km 05, Jaboticabal, Sao Paulo, Brazil; Institute of Chemistry of Unesp, Sao Paulo, Brazil
| | | | - Ed Johnny R Prado
- Department of Preventive Veterinary Medicine of Unesp, Sao Paulo, Brazil
| | - Amanda C Baldassi
- Department of Technology, School of Agrarian and Veterinary Sciences, Sao Paulo State University (Unesp), Via Prof. Paulo Donato Castellane, km 05, Jaboticabal, Sao Paulo, Brazil
| | | | - Ives C Silva
- Department of Preventive Veterinary Medicine of Unesp, Sao Paulo, Brazil
| | | | - Marco A A Belo
- Department of Preventive Veterinary Medicine of Unesp, Sao Paulo, Brazil
| | - Tiago S Balbuena
- Department of Technology, School of Agrarian and Veterinary Sciences, Sao Paulo State University (Unesp), Via Prof. Paulo Donato Castellane, km 05, Jaboticabal, Sao Paulo, Brazil
| | - Samir I Samara
- Department of Preventive Veterinary Medicine of Unesp, Sao Paulo, Brazil
| | - João M Pizauro
- Department of Technology, School of Agrarian and Veterinary Sciences, Sao Paulo State University (Unesp), Via Prof. Paulo Donato Castellane, km 05, Jaboticabal, Sao Paulo, Brazil; Institute of Chemistry of Unesp, Sao Paulo, Brazil
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9
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Shi H, Zhu J, Zou B, Shi L, Du L, Long Y, Wang H, Xu H, Zhen Y, Sun L. Effects of specific egg yolk immunoglobulin on pan-drug-resistant Acinetobacter baumannii. Biomed Pharmacother 2017; 95:1734-1742. [PMID: 28962078 PMCID: PMC7126593 DOI: 10.1016/j.biopha.2017.09.112] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2017] [Revised: 09/20/2017] [Accepted: 09/20/2017] [Indexed: 01/02/2023] Open
Abstract
With the growing emergence of
pan-drug-resistant Acinetobacter baumannii
(PDR-Ab) strains in clinical, new strategies for the treatment of PDR-Ab
infections are urgently needed. Egg yolk immunoglobulin (IgY) as a
convenient and inexpensive antibody has been widely applied to the
therapy of infectious diseases. The aim of this study was to produce IgY
specific to PDR-Ab and investigate its antibacterial effects
in vitro and in vivo.
IgYs specific to two PDR-Ab strains were produced by immunizing hens with
formaldehyde inactivated PDR-Ab cells and isolated from yolks with a
purity of 90% by water dilution, salt precipitations and ultrafiltration.
IgYs showed high titers when subjected to an ELISA and inhibited the
growth of PDR-Ab in a dose-dependent manner in liquid medium. Scanning
electron microscopy assay showed structural modification and aggregation
of PDR-Ab treated with specific IgYs. Freshly cultured PDR-Ab cells were
nasally inhaled in BALB/c mice to induce acute pneumonia. The infected
mice were intraperitoneally injected with specific IgYs using
cefoperazone/sulbactam and dexamethasone as positive controls. The IgYs
specific to PDR-Ab lowered the mortality of mice with PDR-Ab-induced
acute pneumonia, decreased the level of TNF-α and IL-1β in serum and
reduced inflammation in lung tissue. Specific IgY has the potential to be
used as a new therapeutic approach for the treatment of A.
baumannii-induced infections.
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Affiliation(s)
- Huaying Shi
- Affiliated Dalian Friendship Hospital of Dalian Medical University, Dalian, 116001, China
| | - Jie Zhu
- The Second Affiliated Hospital of Dalian Medical University, Dalian, Liaoning, 116021, China
| | - Boyang Zou
- College of Pharmacy, Dalian Medical University, Dalian, 116044, China
| | - Lei Shi
- College of Pharmacy, Dalian Medical University, Dalian, 116044, China
| | - Linying Du
- College of Pharmacy, Dalian Medical University, Dalian, 116044, China
| | - Yayi Long
- College of Pharmacy, Dalian Medical University, Dalian, 116044, China
| | - Huaxin Wang
- College of Basic Medical Sciences, Dalian Medical University, Dalian, 116044, China
| | - Hong Xu
- College of Basic Medical Sciences, Dalian Medical University, Dalian, 116044, China
| | - Yuhong Zhen
- College of Pharmacy, Dalian Medical University, Dalian, 116044, China.
| | - Lidan Sun
- Affiliated Dalian Friendship Hospital of Dalian Medical University, Dalian, 116001, China.
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10
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Sun Y, Yang Y, Wang L, Lv L, Zhu J, Han W, Wang E, Guo X, Zhen Y. Highly sensitive detection of cancer antigen human epidermal growth factor receptor 2 using novel chicken egg yolk immunoglobulin. Biologicals 2015; 43:165-70. [PMID: 25841774 DOI: 10.1016/j.biologicals.2015.03.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2014] [Revised: 02/23/2015] [Accepted: 03/09/2015] [Indexed: 01/07/2023] Open
Abstract
Human epidermal growth factor receptor 2 (HER2) is an important biomarker that plays a crucial role in therapeutic decision-making for breast cancer patients. Ensuring the accuracy and reproducibility of HER2 assays by enzyme-linked immunosorbent assay (ELISA), western blot and immunohistochemistry (IHC) requires high sensitive and specific antibodies. Immunoglobulin Y (IgY) is a kind of avian antibody usually isolated from chicken egg yolks. Generation and use of IgY is of increasing interest in a wide variety of applications within the life sciences. In this study, IgY antibodies against two different truncated proteins of the extracellular domain (ECD) of human HER2 were produced, their sensitivity and specificity were evaluated. Specific IgYs were produced by hens immunized with the ECD proteins of human HER2 in long-standing immunization response and were isolated from yolks with a purity of 90% by water dilution, salt precipitations and ultrafiltration. The anti-HER2 IgYs were analytically validated for specificity by ELISA, western blot, immunocytochemistry and IHC. The IgYs bound desired targets in cells and fixed tissues and showed high affinity to HER2. The results demonstrated the viability of detection of HER2 with IgYs and showed promise for the using of IgYs in strict clinical validation.
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Affiliation(s)
- Yong Sun
- College of Pharmacy, Dalian Medical University, Dalian, Liaoning Province, China
| | - Yiheng Yang
- Clinical Medicine of Seven-Year-Program, Dalian Medical University, Dalian, Liaoning Province, China
| | - Lifen Wang
- The Second Affiliated Hospital of Dalian Medical University, Dalian, Liaoning Province, China
| | - Li Lv
- The Second Affiliated Hospital of Dalian Medical University, Dalian, Liaoning Province, China
| | - Jie Zhu
- The Second Affiliated Hospital of Dalian Medical University, Dalian, Liaoning Province, China
| | - Wenqi Han
- College of Pharmacy, Dalian Medical University, Dalian, Liaoning Province, China
| | - Enxia Wang
- College of Pharmacy, Dalian Medical University, Dalian, Liaoning Province, China
| | - Xin Guo
- College of Pharmacy, Dalian Medical University, Dalian, Liaoning Province, China
| | - Yuhong Zhen
- College of Pharmacy, Dalian Medical University, Dalian, Liaoning Province, China.
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11
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Production, purification and therapeutic potential of egg yolk antibodies for treating Trypanosoma evansi infection. Vet Parasitol 2014; 204:96-103. [PMID: 24916342 DOI: 10.1016/j.vetpar.2014.05.032] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2014] [Revised: 05/14/2014] [Accepted: 05/16/2014] [Indexed: 11/22/2022]
Abstract
The use of avian antibodies has aroused interest in biomedical research due to the numerous advantages compared to mammal's antibodies. Our study aimed to produce and purify IgY immunoglobulins in order to use as an alternative therapy against Trypanosoma evansi. Every 14 days, four New Hampshire chickens were immunized with trypomastigotes of T. evansi, totaling five inoculations. Eggs were collected during 70 days and the extraction of IgY was performed by precipitation through the PEG-6000 method. Characterization and purification of IgY anti-T. evansi were carried out by SDS-PAGE and Western blot, where heavy and light chains were detected. The production of IgY was noted during the whole period, and the average production was 2.87 ± 0.14 at the end of this study. Sample's titration allowed the quantification of specific IgY anti-T. evansi, with antibodies produced showing high avidity indexes. The results indicated that T. evansi is able to generate an immune response in poultry, resulting in a production of specific antibodies. In vivo test showed that IgY treatment resulted in increase of prepatent period, longevity and survival of infected animals, when compared with the positive control, demonstrating an initial, but no curative, trypanocidal activity.
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Hou YY, Zhen YH, Wang D, Zhu J, Sun DX, Liu XT, Wang HX, Liu Y, Long YY, Shu XH. Protective effect of an egg yolk-derived immunoglobulin (IgY) against Prevotella intermedia-mediated gingivitis. J Appl Microbiol 2014; 116:1020-7. [PMID: 24320204 DOI: 10.1111/jam.12419] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2013] [Revised: 11/26/2013] [Accepted: 12/03/2013] [Indexed: 11/26/2022]
Abstract
AIMS To investigate the effects of an egg yolk-derived immunoglobulin (IgY) specific to Prevotella intermedia in vitro and in vivo. METHODS AND RESULTS An IgY specific to P. intermedia was produced by immunizing hens with formaldehyde-inactivated P. intermedia and showed high titres when subjected to an ELISA. The obtained IgY inhibited the growth of P. intermedia in a dose-dependent manner at concentrations from 1 to 20 mg ml(-1) in Center for Disease Control and Prevention liquid medium. Forty rats were challenged with P. intermedia on gingivae and then randomly divided into four groups, which were syringed respectively with phosphate-buffered saline, 1 mg ml(-1) of tinidazole, 20 mg ml(-1) of nonspecific IgY and 20 mg ml(-1) of the IgY specific to P. intermedia at a dosage of 300 μl per day. Gingival index (GI), plaque index (PI), bleeding on probing (BOP), counts of white blood cell (WBC) and histopathological slide of the gums were measured after treatment for 15 days. The gingivitis rats treated with the IgY specific to P. intermedia showed significantly decreased GI, PI, BOP and WBC (P < 0·05). Gum histopathology of the treated rats demonstrated a superior protective effect of the specific IgY on P. intermedia-mediated gingivitis. CONCLUSIONS A new immunoglobulin specific to P. intermedia was developed from egg yolk. This specific IgY can dose-dependently inhibit the growth of P. intermedia and protect rats from gingivitis induced by P. intermedia. SIGNIFICANCE AND IMPACT OF THE STUDY The new IgY has potential for the treatment of P. intermedia-mediated gingivitis.
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Affiliation(s)
- Y-Y Hou
- Clinical Medicine of Seven-year-program, Dalian Medical University, Dalian, China
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