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Abou-El-Naga IF, Mogahed NMFH. Potential roles of Toxocara canis larval excretory secretory molecules in immunomodulation and immune evasion. Acta Trop 2023; 238:106784. [PMID: 36502886 DOI: 10.1016/j.actatropica.2022.106784] [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: 10/01/2022] [Revised: 11/15/2022] [Accepted: 11/27/2022] [Indexed: 12/13/2022]
Abstract
Toxocara canis larvae invade various tissues of different vertebrate species without developing into adults in paratenic host. The long-term survival of the larvae despite exposure to the well-armed immune response is a notable achievement. The larvae modulate the immune response to help the survival of both the host and the larvae. They skew the immune response to type 2/regulatory phenotype. The outstanding ability of the larvae to modulate the host immune response and to evade the immune arms is attributed to the secretion of Toxocara excretory-secretory products (TESPs). TESPs are complex mixture of differing molecules. The present review deals with the molecular composition of the TESPs, their interaction with the host molecules, their effect on the innate immune response, the receptor recognition, the downstream signals the adaptive immunity and the repair of tissues. This review also addresses the role of TESPs molecules in the immune evasion strategy and the potential effect of the induced immunomodulation in some diseases. Identification of parasite components that influence the nematode-host interactions could enhance understanding the molecular basis of nematode pathogenicity. Furthermore, the identification of helminths molecules with immunomodulatory potential could be used in immunotherapies for some diseases.
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Affiliation(s)
- Iman F Abou-El-Naga
- Medical Parasitology Department, Faculty of Medicine, Alexandria University, 12 Abdel Hamid El Deeb Street, Tharwat, Alexandria, Egypt.
| | - Nermine M F H Mogahed
- Medical Parasitology Department, Faculty of Medicine, Alexandria University, 12 Abdel Hamid El Deeb Street, Tharwat, Alexandria, Egypt
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Wang X, Tang B, Zhao Y, Ding J, Wang N, Liu Y, Dong Z, Sun X, Xu Q, Liu M, Liu X. Development of a rapid and sensitive immunochromatographic strip based on EuNPs-ES fluorescent probe for the detection of early Trichinella spiralis-specific IgG antibody in pigs. Vet Res 2021; 52:85. [PMID: 34116710 PMCID: PMC8196438 DOI: 10.1186/s13567-021-00951-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2021] [Accepted: 05/12/2021] [Indexed: 01/03/2023] Open
Abstract
Trichinellosis, which is caused by nematodes of the genus Trichinella, is one of the most important zoonotic parasite diseases in the world. A rapid and sensitive immunochromatographic strip (ICS) based on Eu (III) nanoparticles (EuNPs) was developed for the detection of Trichinella spiralis (T. spiralis) infection in pigs. T. spiralis muscle larvae excretory secretory or preadult worm excretory secretory (ML-ES or PAW-ES) antigens were conjugated with EuNPs probes to capture T. spiralis-specific antibodies in pig sera, after which the complex bound to mouse anti-pig IgG deposited on the test line (T-line), producing a fluorescent signal. In the pigs infected with 100, 1000 and 10 000 ML, seroconversion was first detectable for the EuNPs-ML-ES ICS at 30, 25 and 21 days post-infection (dpi) and for the EuNPs-PAW-ES ICS at 25, 21 and 17 dpi. These results show that EuNPs-PAW-ES ICS detects anti-Trichinella IgG in pigs 4–5 days earlier that test using ML-ES antigens. Our ICS have no cross reaction with other parasite infection sera. Furthermore, the detection process could be completed in 10 min. This study indicated that our ICS can be used for the detection of the circulating antibodies in early T. spiralis infection and provide a novel method for on-site detection of T. spiralis infection in pigs.
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Affiliation(s)
- Xinyu Wang
- Key Laboratory of Zoonosis Research, Ministry of Education, Institute of Zoonosis, College of Veterinary Medicine, Jilin University, Changchun, 130062, China
| | - Bin Tang
- Key Laboratory of Zoonosis Research, Ministry of Education, Institute of Zoonosis, College of Veterinary Medicine, Jilin University, Changchun, 130062, China
| | - Ying Zhao
- Department of Nephrology, First Hospital of Jilin University, Changchun, 130021, China
| | - Jing Ding
- Key Laboratory of Zoonosis Research, Ministry of Education, Institute of Zoonosis, College of Veterinary Medicine, Jilin University, Changchun, 130062, China
| | - Nan Wang
- College of Veterinary Medicine, College of Animal Science and Technology, Jilin Agricultural University, Changchun, China
| | - Yan Liu
- Key Laboratory of Zoonosis Research, Ministry of Education, Institute of Zoonosis, College of Veterinary Medicine, Jilin University, Changchun, 130062, China
| | - Zijian Dong
- Key Laboratory of Zoonosis Research, Ministry of Education, Institute of Zoonosis, College of Veterinary Medicine, Jilin University, Changchun, 130062, China
| | - Xiangdong Sun
- China Animal Health and Epidemiology Center, Qingdao, Shandong, China
| | - Quangang Xu
- China Animal Health and Epidemiology Center, Qingdao, Shandong, China
| | - Mingyuan Liu
- Key Laboratory of Zoonosis Research, Ministry of Education, Institute of Zoonosis, College of Veterinary Medicine, Jilin University, Changchun, 130062, China. .,Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, Jiangsu, China.
| | - Xiaolei Liu
- Key Laboratory of Zoonosis Research, Ministry of Education, Institute of Zoonosis, College of Veterinary Medicine, Jilin University, Changchun, 130062, China.
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Early detection of Trichinella spiralis DNA in the feces of experimentally infected mice by using PCR. Acta Trop 2017; 166:351-355. [PMID: 27983972 DOI: 10.1016/j.actatropica.2016.10.021] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2016] [Revised: 10/25/2016] [Accepted: 10/26/2016] [Indexed: 11/20/2022]
Abstract
The aim of this study was to detect Trichinella spiralis DNA in mouse feces during the early stages of infection using PCR. The target gene fragment, a 1.6kb repetitive sequence of T. spiralis genome, was amplified by PCR from feces of mice infected with 100 or 300 larvae at 3-24h post infection (hpi) and 2-28dpi. The sensitivity of PCR was 0.016 larvae in feces. The primers used were highly specific for T. spiralis. No cross-reactivity was observed with the DNA of other intestinal helminths. T. spiralis DNA was detected in 100% (12/12) of feces of mice infected with 100 or 300 larvae as early as 3hpi, with the peak detection lasting to 12-24hpi, and then fluctuating before declining gradually. By 28dpi, the detection rate of T. spiralis DNA in feces of the two groups of infected mice decreased to 8.33% and 25%, respectively. PCR detection of T. spiralis DNA in feces is simple and specific; it might be useful for the early diagnosis of Trichinella infection.
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Sun GG, Wang ZQ, Liu CY, Jiang P, Liu RD, Wen H, Qi X, Wang L, Cui J. Early serodiagnosis of trichinellosis by ELISA using excretory-secretory antigens of Trichinella spiralis adult worms. Parasit Vectors 2015; 8:484. [PMID: 26394626 PMCID: PMC4579640 DOI: 10.1186/s13071-015-1094-9] [Citation(s) in RCA: 68] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2015] [Accepted: 09/16/2015] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The excretory-secretory (ES) antigens of Trichinella spiralis muscle larvae (ML) are the most commonly used diagnostic antigens for trichinellosis. Their main disadvantage for the detection of anti-Trichinella IgG is false-negative results during the early stage of infection. Additionally, there is an obvious window between clinical symptoms and positive serology. METHODS ELISA with adult worm (AW) ES antigens was used to detect anti-Trichinella IgG in the sera of experimentally infected mice and patients with trichinellosis. The sensitivity and specificity were compared with ELISAs with AW crude antigens and ML ES antigens. RESULTS In mice infected with 100 ML, anti-Trichinella IgG were first detected by ELISA with the AW ES antigens, crude antigens and ML ES antigens 8, 12 and 12 days post-infection (dpi), respectively. In mice infected with 500 ML, specific antibodies were first detected by ELISA with the three antigen preparations at 10, 8 and 10 dpi, respectively. The sensitivity of the ELISA with the three antigen preparations for the detection of sera from patients with trichinellosis at 35 dpi was 100%. However, when the patients' sera were collected at 19 dpi, the sensitivities of the ELISAs with the three antigen preparations were 100% (20/20), 100% (20/20) and 75% (15/20), respectively (P < 0.05). The specificities of the ELISAs with the three antigen preparations were 98.11, 95.60 and 89.31%, respectively (P < 0.05). CONCLUSIONS The sensitivity and specificity of the T. spiralis AW ES antigens were superior to those of the AW crude antigens and ML ES antigens. Thus, the AW ES antigens might serve as potential antigens for the early and specific serodiagnosis of trichinellosis.
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Affiliation(s)
- Ge-Ge Sun
- Department of Parasitology, Medical College, Zhengzhou University, Zhengzhou, China.
| | - Zhong-Quan Wang
- Department of Parasitology, Medical College, Zhengzhou University, Zhengzhou, China.
| | - Chun-Ying Liu
- Department of Parasitology, Medical College, Zhengzhou University, Zhengzhou, China.
| | - Peng Jiang
- Department of Parasitology, Medical College, Zhengzhou University, Zhengzhou, China.
| | - Ruo-Dan Liu
- Department of Parasitology, Medical College, Zhengzhou University, Zhengzhou, China.
| | - Hui Wen
- Department of Parasitology, Medical College, Zhengzhou University, Zhengzhou, China.
| | - Xin Qi
- Department of Parasitology, Medical College, Zhengzhou University, Zhengzhou, China.
| | - Li Wang
- Department of Parasitology, Medical College, Zhengzhou University, Zhengzhou, China.
| | - Jing Cui
- Department of Parasitology, Medical College, Zhengzhou University, Zhengzhou, China.
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Sun GG, Liu RD, Wang ZQ, Jiang P, Wang L, Liu XL, Liu CY, Zhang X, Cui J. New diagnostic antigens for early trichinellosis: the excretory-secretory antigens of Trichinella spiralis intestinal infective larvae. Parasitol Res 2015; 114:4637-44. [PMID: 26342828 DOI: 10.1007/s00436-015-4709-3] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2015] [Accepted: 08/26/2015] [Indexed: 10/23/2022]
Abstract
The excretory-secretory (ES) antigens from Trichinella spiralis muscle larvae (ML) are the most commonly used diagnostic antigens for trichinellosis, but anti-Trichinella IgG antibodies cannot be detected until 2-3 weeks after infection; there is an obvious window period between Trichinella infection and antibody positivity. Intestinal infective larvae (IIL) are the first invasive stage during Trichinella infection, and their ES antigens are firstly exposed to the immune system and might be the early diagnostic markers of trichinellosis. The aim of this study was to evaluate the early diagnostic values of IIL ES antigens for trichinellosis. The IIL were collected from intestines of infected mice at 6 h postinfection (hpi), and IIL ES antigens were prepared by incubation for 18 h. Anti-Trichinella IgG antibodies in mice infected with 100 ML were detectable by ELISA with IIL ES antigens as soon as 10 days postinfection (dpi), but ELISA with ML ES antigens did not permit detection of infected mice before 12 dpi. When the sera of patients with trichinellosis at 19 dpi were assayed, the sensitivity (100 %) of ELISA with IIL ES antigens was evidently higher than 75 % of ELISA with ML ES antigens (P < 0.05) The specificity (96.86 %) of ELISA with IIL ES antigens was also higher than 89.31 % of ELISA with ML ES antigens (P < 0.05). The IIL ES antigens provided a new source of diagnostic antigens and could be considered as a potential early diagnostic antigen for trichinellosis.
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Affiliation(s)
- Ge Ge Sun
- Department of Parasitology, Medical College, Zhengzhou University, 40 Daxue Road, Zhengzhou, 450052, People's Republic of China
| | - Ruo Dan Liu
- Department of Parasitology, Medical College, Zhengzhou University, 40 Daxue Road, Zhengzhou, 450052, People's Republic of China
| | - Zhong Quan Wang
- Department of Parasitology, Medical College, Zhengzhou University, 40 Daxue Road, Zhengzhou, 450052, People's Republic of China.
| | - Peng Jiang
- Department of Parasitology, Medical College, Zhengzhou University, 40 Daxue Road, Zhengzhou, 450052, People's Republic of China
| | - Li Wang
- Department of Parasitology, Medical College, Zhengzhou University, 40 Daxue Road, Zhengzhou, 450052, People's Republic of China
| | - Xiao Lin Liu
- Department of Parasitology, Medical College, Zhengzhou University, 40 Daxue Road, Zhengzhou, 450052, People's Republic of China
| | - Chun Yin Liu
- Department of Parasitology, Medical College, Zhengzhou University, 40 Daxue Road, Zhengzhou, 450052, People's Republic of China
| | - Xi Zhang
- Department of Parasitology, Medical College, Zhengzhou University, 40 Daxue Road, Zhengzhou, 450052, People's Republic of China
| | - Jing Cui
- Department of Parasitology, Medical College, Zhengzhou University, 40 Daxue Road, Zhengzhou, 450052, People's Republic of China.
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Cui J, Wang L, Sun GG, Liu LN, Zhang SB, Liu RD, Zhang X, Jiang P, Wang ZQ. Characterization of a Trichinella spiralis 31 kDa protein and its potential application for the serodiagnosis of trichinellosis. Acta Trop 2015; 142:57-63. [PMID: 25447831 DOI: 10.1016/j.actatropica.2014.10.017] [Citation(s) in RCA: 65] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2014] [Revised: 10/20/2014] [Accepted: 10/26/2014] [Indexed: 10/24/2022]
Abstract
The Trichinella spiralis 31 kDa protein (Ts31) was screened from the excretory-secretory (ES) proteins of muscle larvae (ML) by immunoproteomics using serum from mice infected with T. spiralis at 18 days post infection (dpi). The aim of this study was to characterize the Ts31 protein and to evaluate the potential of the recombinant Ts31 protein (rTs31) for serodiagnosis of human trichinellosis. Ts31 gene was cloned and rTs31 was produced in an E. coli expression system. An anti-rTs31serum recognized the native protein migrating in a 25-55 kDa range by Western blotting of ML crude or ES antigens. Expression of Ts31 gene was observed at all developmental stages of T. spiralis (adult worms, newborn larvae, pre-encapsulated larvae and ML). An immunolocalization analysis identified Ts31 in the cuticle and stichocytes of the parasite. The sensitivity of rTs31-ELISA and ES antigen ELISA for detecting anti-Trichinella IgG antibodies in sera of patients with trichinellosis was 97.83% (45/46) and 86.78% (39/46), respectively (P>0.05); The specificity of rTs31-ELISA was 99.13% (114/115), which was significantly higher than 85.22% (98/115) of ES antigen ELISA (P<0.01). The rTs31 protein of T. spiralis could be considered as a potential diagnostic antigen for trichinellosis.
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Zumaquero-Ríos JL, García-Juarez J, de-la-Rosa-Arana JL, Marcet R, Sarracent-Pérez J. Trichinella spiralis: monoclonal antibody against the muscular larvae for the detection of circulating and fecal antigens in experimentally infected rats. Exp Parasitol 2012; 132:444-9. [PMID: 23026455 DOI: 10.1016/j.exppara.2012.09.016] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2012] [Revised: 08/14/2012] [Accepted: 09/20/2012] [Indexed: 10/27/2022]
Abstract
In this work we search for antigens of Trichinella spiralis in sera and stool of rats experimentally infected. The kinetic of antibodies to excretory and secretory (ES) antigens of muscle larvae (ML) was also determined. Wistar rats were infected with 15 ML per gram of body weight and blood samples were collected weekly for 10 weeks. Antibodies were studied using an indirect ELISA. For detection of circulating antigens and coproantigens, a sandwich ELISA was developed with the use of polyclonal rabbit antibodies obtained against the total extract of ML and an IgM monoclonal antibody (Mab) against ES antigens of ML. No reactivity was observed between Mab and the total worm antigens of Angiostrongylus cantonensis, Ascaris suum, Echinococcus granulosus, Fasciola hepatica, Strongyloides stercoralis, Taenia solium, Toxocara canis and Trichuris trichiura. The IgM Mab recognized antigens of 45, 49, and 55 kDa in ES antigens and was unable to bind ES antigens deglycosylated with trifluoromethanesulphonic acid (TFMS) indicating that a glycan structure is present in the epitope recognized by this Mab. The sensitivity of sandwich ELISA was 1 ng/mL. Circulating antigens were detected in all infected rats between 3 and 8 weeks post infection and coproantigens were found during the first two days post infection. Antibodies were detected since the third week post infection through the end of experiment. These results suggested that antigen detection by our sandwich ELISA could be a useful complementary laboratory test for antibody detection.
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Affiliation(s)
- José-Lino Zumaquero-Ríos
- Laboratorio de Parásitos y Vectores, Escuela de Biología, Benemérita Universidad Autónoma de Puebla, Mexico.
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Cuttell L, Corley SW, Gray CP, Vanderlinde PB, Jackson LA, Traub RJ. Real-time PCR as a surveillance tool for the detection of Trichinella infection in muscle samples from wildlife. Vet Parasitol 2012; 188:285-93. [PMID: 22541794 DOI: 10.1016/j.vetpar.2012.03.054] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2012] [Revised: 03/20/2012] [Accepted: 03/29/2012] [Indexed: 11/26/2022]
Abstract
Trichinella nematodes are the causative agent of trichinellosis, a meat-borne zoonosis acquired by consuming undercooked, infected meat. Although most human infections are sourced from the domestic environment, the majority of Trichinella parasites circulate in the natural environment in carnivorous and scavenging wildlife. Surveillance using reliable and accurate diagnostic tools to detect Trichinella parasites in wildlife hosts is necessary to evaluate the prevalence and risk of transmission from wildlife to humans. Real-time PCR assays have previously been developed for the detection of European Trichinella species in commercial pork and wild fox muscle samples. We have expanded on the use of real-time PCR in Trichinella detection by developing an improved extraction method and SYBR green assay that detects all known Trichinella species in muscle samples from a greater variety of wildlife. We simulated low-level Trichinella infections in wild pig, fox, saltwater crocodile, wild cat and a native Australian marsupial using Trichinella pseudospiralis or Trichinella papuae ethanol-fixed larvae. Trichinella-specific primers targeted a conserved region of the small subunit of the ribosomal RNA and were tested for specificity against host and other parasite genomic DNAs. The analytical sensitivity of the assay was at least 100 fg using pure genomic T. pseudospiralis DNA serially diluted in water. The diagnostic sensitivity of the assay was evaluated by spiking 10 g of each host muscle with T. pseudospiralis or T. papuae larvae at representative infections of 1.0, 0.5 and 0.1 larvae per gram, and shown to detect larvae at the lowest infection rate. A field sample evaluation on naturally infected muscle samples of wild pigs and Tasmanian devils showed complete agreement with the EU reference artificial digestion method (k-value=1.00). Positive amplification of mouse tissue experimentally infected with T. spiralis indicated the assay could also be used on encapsulated species in situ. This real-time PCR assay offers an alternative highly specific and sensitive diagnostic method for use in Trichinella wildlife surveillance and could be adapted to wildlife hosts of any region.
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Affiliation(s)
- Leigh Cuttell
- School of Veterinary Science, University of Queensland, Gatton QLD 4343 Australia.
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Gottstein B, Pozio E, Nöckler K. Epidemiology, diagnosis, treatment, and control of trichinellosis. Clin Microbiol Rev 2009; 22:127-45, Table of Contents. [PMID: 19136437 PMCID: PMC2620635 DOI: 10.1128/cmr.00026-08] [Citation(s) in RCA: 472] [Impact Index Per Article: 31.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
SUMMARY Throughout much of the world, Trichinella spp. are found to be the causative agents of human trichinellosis, a disease that not only is a public health hazard by affecting human patients but also represents an economic problem in porcine animal production and food safety. Due to the predominantly zoonotic importance of infection, the main efforts in many countries have focused on the control of Trichinella or the elimination of Trichinella from the food chain. The most important source of human infection worldwide is the domestic pig, but, e.g., in Europe, meats of horses and wild boars have played a significant role during outbreaks within the past 3 decades. Infection of humans occurs with the ingestion of Trichinella larvae that are encysted in muscle tissue of domestic or wild animal meat. Early clinical diagnosis of trichinellosis is rather difficult because pathognomonic signs or symptoms are lacking. Subsequent chronic forms of the disease are not easy to diagnose, irrespective of parameters including clinical findings, laboratory findings (nonspecific laboratory parameters such as eosinophilia, muscle enzymes, and serology), and epidemiological investigations. New regulations laying down rules for official controls for Trichinella in meat in order to improve food safety for consumers have recently been released in Europe. The evidence that the disease can be monitored and to some extent controlled with a rigorous reporting and testing system in place should be motivation to expand appropriate programs worldwide.
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Affiliation(s)
- Bruno Gottstein
- Faculty of Medicine, Institute of Parasitology, University of Bern, Bern, Switzerland.
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YÉPEZ-MULIA L, HERNÁNDEZ-BELLO R, ARIZMENDI-PUGA N, FONSECA-LIÑÁN R, ORTEGA-PIERRES G. Contributions to the study of Trichinella spiralis TSL-1 antigens in host immunity. Parasite Immunol 2007; 29:661-70. [DOI: 10.1111/j.1365-3024.2007.00985.x] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Bolás-Fernandez F, Corral Bezara LD. TSL-1 antigens of Trichinella: An overview of their potential role in parasite invasion, survival and serodiagnosis of trichinellosis. Res Vet Sci 2006; 81:297-303. [PMID: 16516940 DOI: 10.1016/j.rvsc.2006.01.002] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2005] [Revised: 11/10/2005] [Accepted: 01/10/2006] [Indexed: 11/29/2022]
Abstract
The majority of studies on the immunobiology of Trichinella species have centred on the larval muscular phase (L1) with a view to identifying immunodominant antigens located on the surface of the cuticle and in the larval secretions; the nucleus of the parasite-host interaction. These antigens have been classified as eight groups (TSL-1-TSL-8), of which those belonging to the group TSL-1 have been most intensely studied. The principal constituents are glycoproteins, glycan carriers that contain a unusual sugar, the tyvelose (3,6-dideoxy-d-arabinohexose). Studies aimed at improving serodiagnostic techniques to detect trichinellosis indicate that these antigens are ideal candidates. They are capable of inducing a strong humoral response involving the generation of specific antibodies against beta-tyvelose, a sugar that seems to be exclusive to the Trichuroidea. Furthermore, these glycoproteins appear to fulfil an important function in the development and maintenance of the parasite in the muscular niche, and they appear to be fundamental for the invasion of the intestinal epithelium. It has also been demonstrated that specific monoclonal antibodies against tyvelose can mediate a degree of immunoprotection in the rat through the phenomenon known as rapid expulsion.
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Affiliation(s)
- F Bolás-Fernandez
- Departamento de Parasitología, Facultad de Farmacia, Universidad Complutense, Plaza de Ramón y Cajal s/n, 28040 Madrid, Spain.
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Romarís F, Escalante M, Lorenzo S, Bonay P, Gárate T, Leiro J, Ubeira FM. Monoclonal antibodies raised in Btk(xid) mice reveal new antigenic relationships and molecular interactions among gp53 and other Trichinella glycoproteins. Mol Biochem Parasitol 2002; 125:173-83. [PMID: 12467984 DOI: 10.1016/s0166-6851(02)00239-6] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Tyvelose-bearing glycoproteins or Trichinella spiralis Group 1 antigens (TSL-1 antigens) are thought to be key molecules in the immunobiology of Trichinella. In the present study, we investigated the binding characteristics of several mAbs produced in Btk(xid) immunodeficient mice that recognise gp53 and some other minor glycoproteins of this parasite. The data obtained reveal the existence of an O-glycan/peptide epitope (recognised by mAb US8) common to all TSL-1 glycoproteins, as well as a specific interaction between the TSL-1 antigen gp53 and other unknown Trichinella glycoproteins in the 35-40 kDa range (these latter react with mAbs US8 and US9, but not with mAb US5). Some of the epitopes recognised by our mAbs are differentially expressed in Trichinella species: the epitope recognised by mAb US5 on gp53 (another O-glycan/peptide epitope) is present only in T. spiralis, whereas those recognised by mAbs US8 and US9 (peptide epitopes) are present in encapsulated Trichinella species. The data obtained also reveal that gp53 is synthesised and glycosylated in beta-stichocytes only. The possible relevance of these findings is discussed.
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MESH Headings
- Agammaglobulinaemia Tyrosine Kinase
- Amino Acid Sequence
- Animals
- Antibodies, Helminth/biosynthesis
- Antibodies, Helminth/genetics
- Antibodies, Helminth/immunology
- Antibodies, Monoclonal/biosynthesis
- Antibodies, Monoclonal/genetics
- Antibodies, Monoclonal/immunology
- Antigens, Helminth/immunology
- Antigens, Helminth/metabolism
- Cross Reactions/immunology
- Epitopes/chemistry
- Glycoproteins/immunology
- Glycoproteins/metabolism
- Mice
- Mice, Inbred BALB C
- Mice, Inbred CBA
- Mice, Mutant Strains
- Protein-Tyrosine Kinases/genetics
- Trichinella/classification
- Trichinella/cytology
- Trichinella/immunology
- Trichinella/ultrastructure
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Affiliation(s)
- Fernanda Romarís
- Laboratorio de Parasitología, Facultad de Farmacia, Universidad de Santiago de Compostela, Santiago de Compostela 15782, Spain
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