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Sharaf MS. Scabies vaccines: where we stand and challenges ahead. Parasitol Res 2024; 123:285. [PMID: 39046602 PMCID: PMC11269436 DOI: 10.1007/s00436-024-08298-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2024] [Accepted: 07/10/2024] [Indexed: 07/25/2024]
Abstract
Scabies is an itchy skin disease caused by the burrowing mite, Sarcoptes scabiei. During their lifespan, female mites invade the stratum corneum and create tunnels in which they reside, move, feed, deposit fecal pellets, and lay eggs. Globally, more than 200 million people are estimated to be affected by scabies annually. Currently, using scabicidal agents is the only approved method for treating scabies. However, resistance to commonly used agents such as permethrin and ivermectin has been observed in scabies mites. Therefore, the development of vaccines for scabies, either as a preventative measure or for treatment, is crucial to control such neglected diseases. Since the host could evolve a protective immune response that could prevent re-infestation by scabies mites, vaccine development is theoretically possible. This review aims to provide a comprehensive overview of the ongoing challenges regarding the currently available control measures for scabies. It also explores the promising path of scabies vaccine development, highlighting the current state of research and challenges that need to be addressed to develop new and innovative measures for both treating and preventing scabies infections.
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Affiliation(s)
- Mahmoud S Sharaf
- Parasitology Department, Faculty of Medicine, Tanta University, Tanta, Gharbia, Egypt.
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Shen N, Wei W, Chen Y, Liu S, Xiong L, Xiao J, Gu X, Xie Y, Xu J, Jing B, Peng X, Yang G. Vaccination with a cocktail vaccine elicits significant protection against Sarcoptes scabiei in rabbits, whereas the multi-epitope vaccine offers limited protection. Exp Parasitol 2023; 245:108442. [PMID: 36509170 DOI: 10.1016/j.exppara.2022.108442] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2022] [Revised: 11/23/2022] [Accepted: 12/08/2022] [Indexed: 12/13/2022]
Abstract
Sarcoptes scabiei cause scabies in humans or sarcoptic mange in animals. Currently, information regarding vaccines against S. scabiei is limited and no commercial vaccine is available. In present study, we expressed and mixed recombinant S. scabiei serpin (rSs-serpin), recombinant S. scabiei chitinase-like protein-5 [rSs-CLP5] and -12 [rSs-CLP12] as a cocktail vaccine (three proteins mixed), and also a multi-epitope protein derived from these three S. scabiei genes was expressed as a vaccine candidate to evaluate the effects of two vaccine strategies. Four test groups (n = 12 per group) and a control group (n = 12 per group) were involved in this vaccination trial. The results showed that 91.67% (11/12) and 83.33% (10/12) of rabbits exhibited no detectable skin lesions from S. scabiei infestation in cocktail vaccine groups, whereas two multi-epitope groups produced only a few rabbits (5/12, 6/12) having no detectable skin lesions. Four test groups displayed significant increases in specific IgG antibodies (Abs) and total IgE Abs after immunized with recombinant proteins. Taken together, our data demonstrated a mixture of rSs-serpin, rSs-CLP5 and rSs-CLP12 was a promising vaccine candidate that induced robust immune protection and could significantly decrease mite populations to reduce the direct transmission between rabbits. However, vaccination with the multi-epitope protein showed limited protection in rabbits.
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Affiliation(s)
- Nengxing Shen
- Department of Parasitology, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang, 611130, China
| | - Wenrui Wei
- Department of Parasitology, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang, 611130, China
| | - Yuhang Chen
- Department of Parasitology, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang, 611130, China; Mianyang Animal Disease Control Center, Mianyang, 621000, China
| | - Song Liu
- Department of Parasitology, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang, 611130, China
| | - Lang Xiong
- Department of Parasitology, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang, 611130, China
| | - Jie Xiao
- Department of Parasitology, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang, 611130, China
| | - Xiaobin Gu
- Department of Parasitology, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang, 611130, China
| | - Yue Xie
- Department of Parasitology, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang, 611130, China
| | - Jing Xu
- Department of Parasitology, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang, 611130, China
| | - Bo Jing
- Department of Parasitology, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang, 611130, China
| | - Xuerong Peng
- Department of Chemistry, College of Life and Basic Science, Sichuan Agricultural University, Wenjiang, 611130, China
| | - Guangyou Yang
- Department of Parasitology, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang, 611130, China.
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Xu Y, Xu Z, Gu X, Xie Y, He R, Xu J, Jing B, Peng X, Yang G. Immunomodulatory effects of two recombinant arginine kinases in Sarcoptes Scabiei on host peripheral blood mononuclear cells. Front Immunol 2022; 13:1035729. [DOI: 10.3389/fimmu.2022.1035729] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2022] [Accepted: 10/28/2022] [Indexed: 11/15/2022] Open
Abstract
BackgroundAs an important zoonotic parasitic disease with global distribution, scabies causes serious public health and economic problems. Arginine kinase (AK) is involved in cell signal transduction, inflammation, and apoptosis. Two AKs were identified in Sarcoptes scabiei, but their functions in the host immune response remain unclear.MethodsrSsAK-1 and rSsAK-2 were expressed, purified, and immunolocalized. The effects of rSsAK-1 and rSsAK-2 on rabbit PBMC proliferation, apoptosis, and migration; Bcl-2, Bcl-xl, Fas, Bax, and NF-κB transcription levels; and IL-2, IFN-γ, IL-4, IL-10, TGF-β1, and IL-17 secretion were detected.ResultsrSsAK-1 and rSsAK-2 were cloned and expressed successfully. Both enzymes were ~57 kDa and contained 17-kDa tagged proteins, and had good catalytic activity and immunoreactivity. The proteins were located in the S. scabiei exoskeleton, chewing mouthparts, legs, stomach, and intestine. SsAK-1 and SsAK-2 were secreted in the pool and epidermis of the skin lesions, which may be involved in S. scabiei–host interaction. rSsAK-1 and rSsAK-2 significantly promoted cell proliferation, induced cell migration, inhibited apoptosis, and increased Bcl-2, Bcl-xl and NF-κB (p65) transcription levels concentration-dependently, and inhibited IL-2, IFN-γ, and IL-10 secretion and promoted IL-4 and IL-17 secretion.ConclusionrSsAK-1 and rSsAK-2 might increase Bcl-2 and Bcl-xl expression by activating the NF-κB signaling pathway to promote cell proliferation and inhibit apoptosis, which induced PBMC survival. By inducing PBMC migration to the infection site, rSsAK-1 and rSsAK-2 shifted the Th1/Th2 balance toward Th2 and changed the Th17/Treg balance, which indicated their immune role in S. scabiei allergic inflammation.
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Mange in Rabbits: An Ectoparasitic Disease with a Zoonotic Potential. Vet Med Int 2022; 2022:5506272. [PMID: 35880196 PMCID: PMC9308540 DOI: 10.1155/2022/5506272] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2022] [Revised: 05/31/2022] [Accepted: 06/20/2022] [Indexed: 11/18/2022] Open
Abstract
Mange in rabbits is a very important parasitic disease causing high losses. The disease is caused mainly by Sarcoptes scabiei, Psoroptes cuniculi, Cheyletiella parasitovorax, and Notoedres cati. Body mange and ear mange are the most common forms of this disease in rabbits. Animals can get mite infestation through direct contact with infected animals or contaminated fomites. This infestation is characterized by zoonotic nature and public health burden. The skin affection is characterized by pruritus, alopecia, severe cachexia, and sometimes death. Infestation is diagnosed mainly by skin scraping and microscopic examination. Control measures mainly depend on the use of different types of systemic and topical acaricides and the use of natural products and supportive elements. Vaccine is not commercially available and is still under investigation. Accordingly, this review article was designed to shed the light on the mange disease in rabbits in terms of mite's infestation and susceptibility, clinical manifestations, zoonosis, diagnosis, and control strategies.
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Abstract
About half of the world's population and 80% of the world's biodiversity can be found in the tropics. Many diseases are specific to the tropics, with at least 41 diseases caused by endemic bacteria, viruses, parasites, and fungi. Such diseases are of increasing concern, as the geographic range of tropical diseases is expanding due to climate change, urbanization, change in agricultural practices, deforestation, and loss of biodiversity. While traditional medicines have been used for centuries in the treatment of tropical diseases, the active natural compounds within these medicines remain largely unknown. In this review, we describe infectious diseases specific to the tropics, including their causative pathogens, modes of transmission, recent major outbreaks, and geographic locations. We further review current treatments for these tropical diseases, carefully consider the biodiscovery potential of the tropical biome, and discuss a range of technologies being used for drug development from natural resources. We provide a list of natural products with antimicrobial activity, detailing the source organisms and their effectiveness as treatment. We discuss how technological advancements, such as next-generation sequencing, are driving high-throughput natural product screening pipelines to identify compounds with therapeutic properties. This review demonstrates the impact natural products from the vast tropical biome have in the treatment of tropical infectious diseases and how high-throughput technical capacity will accelerate this discovery process.
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Talaga-Ćwiertnia K. Sarcoptes Infestation. What Is Already Known, and What Is New about Scabies at the Beginning of the Third Decade of the 21st Century? Pathogens 2021; 10:868. [PMID: 34358018 PMCID: PMC8308645 DOI: 10.3390/pathogens10070868] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2021] [Revised: 07/05/2021] [Accepted: 07/05/2021] [Indexed: 11/28/2022] Open
Abstract
Currently, there are three known subtypes of scabies: ordinary, crusted, and bullous. The worldwide prevalence of scabies remains high in the 21st century. To decrease the social, economic, and psychological impact on the enormous population infected, a lot of important work has been completed over the last 20 years concerning the management of scabies. For example, a standardization of guidelines for the treatment of scabies has been completed and programs have been designed for the prevention and treatment in endemic populations, called mass drug administrations. Unfortunately, these only apply to the ordinary form of scabies. Moreover, resistance to the drugs currently used in treatment is growing, which imposes the need to search for new treatments. For this purpose, new acaricides are being developed to enhance the therapeutic options for the patients' benefit and effectively treat this disease. There is also the necessity for prevention before the development of scabies. An effective vaccine has the potential to protect people before this disease, especially in endemic areas. Unfortunately, there are no such vaccines against Sarcoptes yet.
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Affiliation(s)
- Katarzyna Talaga-Ćwiertnia
- Jagiellonian University Medical College, Faculty of Medicine, Chair of Microbiology, Department of Infection Control and Mycology, 31-008 Kraków, Poland
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Siddig EE, Hay R. Laboratory-based diagnosis of scabies: a review of the current status. Trans R Soc Trop Med Hyg 2021; 116:4-9. [PMID: 33763705 PMCID: PMC8776561 DOI: 10.1093/trstmh/trab049] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2021] [Revised: 02/28/2021] [Indexed: 02/05/2023] Open
Abstract
Scabies is a neglected tropical disease (NTD) of the skin that is caused by the mite Sarcoptes scabiei. It is considered to be an important public health problem in many regions. The disease is at its most prevalent in low-resource countries where there are overcrowded living conditions coupled with poor hygiene. In some regions, mass drug administration using ivermectin is a key population-based approach to the control of scabies. Before starting a patient on specific treatment, confirming the diagnosis by accurate and rapid identification of the organism is critical. Different laboratory-based techniques for scabies have been developed in the last few decades. These include direct microscopy and histopathology. More recently, serological testing, dermoscopy and different molecular techniques have been developed as diagnostic methods for scabies. To date, none of these, apart from microscopy and dermoscopy, has been translated into routine clinical laboratory practice. A simple point-of-care or laboratory test would provide a rapid and confirmed diagnosis and early institution of effective treatment. In this review we present an update on the laboratory techniques currently in use for the identification of scabies.
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Affiliation(s)
- Emmanuel Edwar Siddig
- Nile University, Faculty of Medicine, Khartoum, Sudan.,Erasmus Medical Center, University Medical Center Rotterdam, Department of Medical Microbiology and Infectious Diseases, Wytemaweg 80 3015 CN, Rotterdam, The Netherlands
| | - Roderick Hay
- Kings College London, Guys Campus, London SE1 9RT,UK
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Shen N, Chen Y, Wei W, Xiong L, Tao Y, Xiao J, Liu S, He X, Du X, Gu X, Xie Y, Xu J, Peng X, Yang G. Comparative analysis of the allergenic characteristics and serodiagnostic potential of recombinant chitinase-like protein-5 and -12 from Sarcoptes scabiei. Parasit Vectors 2021; 14:148. [PMID: 33750446 PMCID: PMC7941879 DOI: 10.1186/s13071-021-04654-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2020] [Accepted: 02/23/2021] [Indexed: 11/10/2022] Open
Abstract
Background Scabies is caused by burrowing of the mite Sarcoptes scabiei into the stratum corneum. Currently, diagnosis via routine skin scraping is very difficult, and information on the allergenic identification of S. scabiei remains limited. Methods We performed comparative analysis of the serological diagnostic potential of recombinant S. scabiei chitinase-like protein-5 (rSsCLP5) and recombinant S. scabiei chitinase-like protein-12 (rSsCLP12) by measuring the levels of serum-specific IgG and IgE antibodies (Abs) as diagnostic markers. In addition, the allergenic characteristics of rSsCLP5 and rSsCLP12 were evaluated using IgE-binding experiments and skin tests. Results The IgE Abs-based indirect enzyme-linked immunosorbent assay (ELISA) methods showed high sensitivity and specificity: the rSsCLP5-based assay had 93.5% sensitivity and 94.4% specificity; the rSsCLP12-based assay had 100% sensitivity and 98.1% specificity. The specific IgE Abs in infested mouse sera could bind rSsCLP5 and rSsCLP12. In skin tests, rabbits in the rSsCLP5 and rSsCLP12 groups and positive control (histamine) groups exhibited allergic reactions. Most test sites in the rSsCLP12 group had edema, bleeding spots, and even ulcers or scabs, but such allergy symptoms were rare in the rSsCLP5 group. Moreover, the allergic history rabbit group had more severe allergic reactions and lower levels of IgE Abs compared to the healthy rabbit group in the same protein group. Conclusions These findings validate the use of IgE Abs to rSsCLP5 and rSsCLP12 as potentially useful markers for diagnosing scabies. Moreover, both rSsCLP5 and rSsCLP12 have allergenic properties, and the potential allergen rSsCLP12 is a stronger allergen than rSsCLP5.
![]() Supplementary Information The online version contains supplementary material available at 10.1186/s13071-021-04654-0.
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Affiliation(s)
- Nengxing Shen
- Department of Parasitology, College of Veterinary Medicine, Sichuan Agricultural University, 211 Huimin Road, Wenjiang, Chengdu, 611130, Sichuan, China
| | - Yuhang Chen
- Department of Parasitology, College of Veterinary Medicine, Sichuan Agricultural University, 211 Huimin Road, Wenjiang, Chengdu, 611130, Sichuan, China
| | - Wenrui Wei
- Department of Parasitology, College of Veterinary Medicine, Sichuan Agricultural University, 211 Huimin Road, Wenjiang, Chengdu, 611130, Sichuan, China
| | - Lang Xiong
- Department of Parasitology, College of Veterinary Medicine, Sichuan Agricultural University, 211 Huimin Road, Wenjiang, Chengdu, 611130, Sichuan, China
| | - Yuanyuan Tao
- Department of Parasitology, College of Veterinary Medicine, Sichuan Agricultural University, 211 Huimin Road, Wenjiang, Chengdu, 611130, Sichuan, China
| | - Jie Xiao
- Department of Parasitology, College of Veterinary Medicine, Sichuan Agricultural University, 211 Huimin Road, Wenjiang, Chengdu, 611130, Sichuan, China
| | - Song Liu
- Department of Parasitology, College of Veterinary Medicine, Sichuan Agricultural University, 211 Huimin Road, Wenjiang, Chengdu, 611130, Sichuan, China
| | - Xue He
- Department of Parasitology, College of Veterinary Medicine, Sichuan Agricultural University, 211 Huimin Road, Wenjiang, Chengdu, 611130, Sichuan, China
| | - Xiaodi Du
- Department of Parasitology, College of Veterinary Medicine, Sichuan Agricultural University, 211 Huimin Road, Wenjiang, Chengdu, 611130, Sichuan, China
| | - Xiaobin Gu
- Department of Parasitology, College of Veterinary Medicine, Sichuan Agricultural University, 211 Huimin Road, Wenjiang, Chengdu, 611130, Sichuan, China
| | - Yue Xie
- Department of Parasitology, College of Veterinary Medicine, Sichuan Agricultural University, 211 Huimin Road, Wenjiang, Chengdu, 611130, Sichuan, China
| | - Jing Xu
- Department of Parasitology, College of Veterinary Medicine, Sichuan Agricultural University, 211 Huimin Road, Wenjiang, Chengdu, 611130, Sichuan, China
| | - Xuerong Peng
- Department of Chemistry, College of Life and Basic Science, Sichuan Agricultural University, Wenjiang, 611130, China
| | - Guangyou Yang
- Department of Parasitology, College of Veterinary Medicine, Sichuan Agricultural University, 211 Huimin Road, Wenjiang, Chengdu, 611130, Sichuan, China.
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Naz S, Ahmad S, Walton S, Abbasi SW. Multi-epitope based vaccine design against Sarcoptes scabiei paramyosin using immunoinformatics approach. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.114105] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Zhou Y, Yan Y, Yang D, Zheng G, Xie L, Zhang R. Cloning, characterization, and functional analysis of chitinase-like protein 1 in the shell of Pinctada fucata. Acta Biochim Biophys Sin (Shanghai) 2020; 52:954-966. [PMID: 32634202 DOI: 10.1093/abbs/gmaa076] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2020] [Revised: 03/01/2020] [Accepted: 06/05/2020] [Indexed: 11/14/2022] Open
Abstract
Biomineralization, especially shell formation, is a sophisticated process regulated by various matrix proteins. Pinctada fucata chitinase-like protein 1 (Pf-Clp1), which belongs to the GH18 family, was discovered by our group using in-depth proteomic analysis. However, its function is still unclear. In this study, we first obtained the full-length cDNA sequence of Pf-Clp1 by RACE. Real-time polymerase chain reaction results revealed that Pf-Clp1 was highly expressed in the important biomineralization tissues, the mantle edge and the mantle pallial. We expressed and purified recombinant protein rPf-Clp1 in vitro to investigate the function of Pf-Clp1 on CaCO3 crystallization. Scanning electron microscopy imaging and Raman spectroscopy revealed that rPf-Clp1 was able to affect the morphologies of calcite crystal in vitro. Shell notching experiments suggested that Pf-Clp1 might function as a negative regulator during shell formation in vivo. Knockdown of Pf-Clp1 by RNAi led to the overgrowth of aragonite tablets, further confirming its potential negative regulation on biomineralization, especially in the nacreous layer. Our work revealed the potential function of molluscan Clp in shell biomineralization for the first time and unveiled some new understandings toward the molecular mechanism of shell formation.
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Affiliation(s)
- Yunpin Zhou
- Ministry of Education Key Laboratory of Protein Sciences, School of Life Sciences, Tsinghua University, Beijing 100084, China
| | - Yi Yan
- Ministry of Education Key Laboratory of Protein Sciences, School of Life Sciences, Tsinghua University, Beijing 100084, China
| | - Dong Yang
- Ministry of Education Key Laboratory of Protein Sciences, School of Life Sciences, Tsinghua University, Beijing 100084, China
| | - Guilan Zheng
- Ministry of Education Key Laboratory of Protein Sciences, School of Life Sciences, Tsinghua University, Beijing 100084, China
| | - Liping Xie
- Ministry of Education Key Laboratory of Protein Sciences, School of Life Sciences, Tsinghua University, Beijing 100084, China
| | - Rongqing Zhang
- Ministry of Education Key Laboratory of Protein Sciences, School of Life Sciences, Tsinghua University, Beijing 100084, China
- Zhejiang Provincial Key Laboratory of Applied Enzymology, Yangtze Delta Region Institute of Tsinghua University, Jiaxing 314006, China
- College of Biological, Chemical Sciences and Engineering, Jiaxing University, Jiaxing 314001, China
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Pérez JM, Granados JE, Espinosa J, Ráez‐Bravo A, López‐Olvera JR, ROSSI L, Meneguz PG, Angelone S, Fandos P, Soriguer RC. Biology and management of sarcoptic mange in wild Caprinae populations. Mamm Rev 2020. [DOI: 10.1111/mam.12213] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Jesús M. Pérez
- Department of Animal and Plant Biology, and Ecology Jaén University Campus Las Lagunillas, s.n.; E‐23071 Jaén Spain
| | - José E. Granados
- Carretera Antigua de Sierra Nevada Espacio Natural de Sierra Nevada Km 7, E‐18071 Pinos Genil, Granada Spain
| | - José Espinosa
- Department of Animal Health‐Instituto de Ganadería de Montaña (IGM) ULe‐CSIC León Spain
- Faculty of Veterinary Science University of León Campus de Vegazana, s.n.; E 24071 León Spain
| | - Arián Ráez‐Bravo
- Servei d’Ecopatologia de Fauna Salvatge Departament de Medicina i Cirurgia Animals Universitat Autònoma de Barcelona E‐08193 Bellaterra, Barcelona Spain
| | - Jorge R. López‐Olvera
- Servei d’Ecopatologia de Fauna Salvatge Departament de Medicina i Cirurgia Animals Universitat Autònoma de Barcelona E‐08193 Bellaterra, Barcelona Spain
| | - Luca ROSSI
- Dipartimento di Science Veterinarie Università di Torino Largo Paolo Braccini 2 10095 Grugliasco Italy
| | - Pier Giuseppe Meneguz
- Dipartimento di Science Veterinarie Università di Torino Largo Paolo Braccini 2 10095 Grugliasco Italy
| | - Samer Angelone
- Institute of Evolutionary Biology and Environmental Studies (IEU) University of Zürich Winterthurerstrasse 190 Zürich Switzerland
| | - Paulino Fandos
- Agencia de Medio Ambiente y Agua Isla de la Cartuja E‐41092 Sevilla Spain
| | - Ramón C Soriguer
- Estación Biológica de Doñana (CSIC) Av. Américo Vespucio, s.n E‐41092 Sevilla Spain
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Shen N, Wei W, Chen Y, Ren Y, Xiong L, Tao Y, Gu X, Xie Y, Peng X, Yang G. An Antibody Persistent and Protective Two rSsCLP-Based Subunit Cocktail Vaccine against Sarcoptes scabiei in a Rabbit Model. Vaccines (Basel) 2020; 8:vaccines8010129. [PMID: 32187979 PMCID: PMC7157647 DOI: 10.3390/vaccines8010129] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2020] [Revised: 03/09/2020] [Accepted: 03/12/2020] [Indexed: 11/16/2022] Open
Abstract
Scabies is a highly contagious disease caused by Sarcoptes scabiei which burrows into stratum corneum of host's skin. In this study, after optimizing vaccination schedule, a vaccination trial is comprised of three test groups of rabbits (n = 10/group) by immunization with (1) rSsCLP5; (2) rSsCLP12; or (3) a mixture of rSsCLP5 and rSsCLP12, three biological replicates groups (n = 10/group) and three control groups (n = 10/group). Levels of specific IgG, total IgE and cytokines in sera were detected and histopathologically analyzed as indicators of vaccine effects. The results showed that 85% (17/20) of rabbits exhibited no detectable skin lesions of S. scabiei infestation in mixed protein groups compared to single protein groups with 75% (15/20) and 70% (14/20), respectively. Moreover, the deworming rates of mixed groups are increased by 10%-20% compared with that of single groups. Each of six groups immunized with rSsCLP displayed significant increases of specific IgG, total IgE, IL-10, and TNF-α. The degree of skin damage in test groups also significantly lower than that of control groups. Thus, purified rSsCLP5 and rSsCLP12 subunit cocktail vaccine induced robust immune protection and could significantly decrease mite populations to reduce the direct transmission between rabbits.
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Affiliation(s)
- Nengxing Shen
- Department of Parasitology, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang 611130, China; (N.S.); (W.W.); (Y.C.); (L.X.); (Y.T.); (X.G.); (Y.X.)
| | - Wenrui Wei
- Department of Parasitology, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang 611130, China; (N.S.); (W.W.); (Y.C.); (L.X.); (Y.T.); (X.G.); (Y.X.)
| | - Yuhang Chen
- Department of Parasitology, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang 611130, China; (N.S.); (W.W.); (Y.C.); (L.X.); (Y.T.); (X.G.); (Y.X.)
| | - Yongjun Ren
- Animal Breeding and Genetics Key Laboratory of Sichuan Province, Chengdu 610066, Sichuan, China;
| | - Lang Xiong
- Department of Parasitology, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang 611130, China; (N.S.); (W.W.); (Y.C.); (L.X.); (Y.T.); (X.G.); (Y.X.)
| | - Yuanyuan Tao
- Department of Parasitology, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang 611130, China; (N.S.); (W.W.); (Y.C.); (L.X.); (Y.T.); (X.G.); (Y.X.)
| | - Xiaobin Gu
- Department of Parasitology, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang 611130, China; (N.S.); (W.W.); (Y.C.); (L.X.); (Y.T.); (X.G.); (Y.X.)
| | - Yue Xie
- Department of Parasitology, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang 611130, China; (N.S.); (W.W.); (Y.C.); (L.X.); (Y.T.); (X.G.); (Y.X.)
| | - Xuerong Peng
- Department of Chemistry, College of Life and Basic Science, Sichuan Agricultural University, Wenjiang 611130, China;
| | - Guangyou Yang
- Department of Parasitology, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang 611130, China; (N.S.); (W.W.); (Y.C.); (L.X.); (Y.T.); (X.G.); (Y.X.)
- Correspondence:
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Wei W, Ren Y, Shen N, Song H, Xu J, Hua R, Zhang H, Angel C, Gu X, Kuang L, Xie Y, Peng X, Xie X, Yang G. Comparative analysis of host resistance to Sarcoptes scabiei var. cuniculi in two different rabbit breeds. Parasit Vectors 2019; 12:530. [PMID: 31703721 PMCID: PMC6842134 DOI: 10.1186/s13071-019-3764-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2019] [Accepted: 10/23/2019] [Indexed: 11/25/2022] Open
Abstract
BACKGROUND Scabies, caused by infestation of the mite Sarcoptes scabiei, is one of the most severe ectoparasitic diseases in rabbits. Scabies seriously affects the commercial rabbit breeding, causing severe economic losses. Host resistance to S. scabiei is an important factor in further development of the rabbit industry. In the present study, we compared the host resistance to S. scabiei var. cuniculi of a new breed of domestic rabbit propagated by the Sichuan Animal Sciences Academy (QiXing rabbit, QX) compared with that of a traditional rabbit breed in the domestic rabbit industry (IRA rabbit, IRA). METHODS Both QX and IRA rabbits were experimentally infested with live S. scabiei var. cuniculi mites for 48 h. Then, during the course of four-week experimental infestation period, the body weight of rabbits was recorded every two weeks for calculating body-weight variations in comparison to the non-infested control rabbits. Skin lesions in the foot area were assessed on weekly basis and serum samples were tested weekly for the estimation of changes in the total antibody levels (IgG, IgE and IgM). Moreover, DNA extracted from the blood samples was amplified for analysis of the genetic diversity in the major histocompatibility complex, class II, DQ Alpha (MHC-DQA) gene. RESULTS Compared to the IRA rabbits, the QX rabbits showed a significantly higher (P < 0.05) relative body weight gain compared to the non-infested control rabbits and significantly lower (P < 0.05) scores for foot skin lesions and higher levels of IgG, IgE and IgM at weeks 1 to 4, week 2 and week 1 post-infestation, respectively. Furthermore, a polymorphism site at position 103 bp of exon two of MHC-DQA gene and a different gene frequency were found between two rabbit breeds, suggesting the genetic basis for the differential host resistance to the S. scabiei var. cuniculi between two rabbit breeds. CONCLUSIONS The QX rabbits showed higher host resistance to S. scabiei var. cuniculi compared to the IRA rabbits at the clinical, immunological and genetic levels. These results provide a reference for the breeding of rabbits with adequately improved and sustained host resistance to scabies in the domestic rabbit industry.
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Affiliation(s)
- Wenrui Wei
- Department of Parasitology, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang, 611130 China
| | - Yongjun Ren
- Sichuan Animal Sciences Academy, Chengdu, 610066 Sichuan China
- Animal Breeding and Genetics Key Laboratory of Sichuan Province, Chengdu, 610066 Sichuan China
| | - Nengxing Shen
- Department of Parasitology, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang, 611130 China
| | - Hongyu Song
- Department of Parasitology, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang, 611130 China
| | - Jing Xu
- Department of Parasitology, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang, 611130 China
| | - Ruiqi Hua
- Department of Parasitology, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang, 611130 China
| | - Haojie Zhang
- Department of Parasitology, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang, 611130 China
| | - Christiana Angel
- Department of Parasitology, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang, 611130 China
- Department of Veterinary Parasitology, Faculty of Veterinary Sciences, Shaheed Benazir Bhutto University of Veterinary and Animal Sciences, Sakrand, 67210 Sindh Pakistan
| | - Xiaobin Gu
- Department of Parasitology, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang, 611130 China
| | - Liangde Kuang
- Sichuan Animal Sciences Academy, Chengdu, 610066 Sichuan China
- Animal Breeding and Genetics Key Laboratory of Sichuan Province, Chengdu, 610066 Sichuan China
| | - Yue Xie
- Department of Parasitology, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang, 611130 China
| | - Xuerong Peng
- Department of Chemistry, College of Life and Basic Science, Sichuan Agricultural University, Wenjiang, 611130 China
| | - Xiaohong Xie
- Sichuan Animal Sciences Academy, Chengdu, 610066 Sichuan China
- Animal Breeding and Genetics Key Laboratory of Sichuan Province, Chengdu, 610066 Sichuan China
| | - Guangyou Yang
- Department of Parasitology, College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang, 611130 China
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