Schistosoma parasite continued to be focus of the solicitude investigators to control the prevalence of the parasite. The efforts are needed for sensitive and accurate diagnosis that can utilize to rapidly map the prevalence of the disease. Our study aimed to benefit from the necessity of the S. mansoni for enzyme TGR, in utilization of the enzyme as an antigen target and evaluate its efficacy in the diagnosis of S. mansoni infection patients. The results revealed that smTGR could be detected in various organs of infected mice and localized in all parasites life cycle stages except eggs using smTGR pAb. Sandwich ELISA reveled that this antigen can be relied as a diagnostic antigen target in serum and urine.
Table of Contents
I. INTRODUCTION AND AIM OF THE WORK
II. REVIEW OF LETERATURE
III. MATERIALS AND METHODS
IV. RESULTS
V. DISCUSSION
VI. SUMMARY
VII. REFERENCES
Research Objectives and Themes
This study aims to purify Thioredoxin Glutathione Reductase (TGR) from Schistosoma mansoni, prepare specific polyclonal antibodies, investigate the localization pattern of TGR across different parasite stages and in infected murine organs, and evaluate the diagnostic potential of the purified TGR for detecting human Schistosoma mansoni infections.
- Purification and characterization of S. mansoni TGR.
- Production and standardization of anti-TGR polyclonal antibodies.
- Immunolocalization of TGR in various parasite life cycle stages.
- Evaluation of TGR-based sandwich ELISA for clinical diagnosis.
- Comparative analysis of TGR detection in serum and urine samples.
Excerpt from the Book
Thioredoxin Glutathione Reductase (TGR)
Studies of the Schistosoma life cycle have focused on the fact it can survive for decades in the blood stream of the human host without being severely affected by the immune system and the associated assault by various ROS. Since Schistosomes do not have catalase to degrade hydrogen peroxide Mkoji et al., 1988 a&b), other mechanisms must exist within the parasite to degrade ROS.
Two principal components of this defense system have been recently identified in S. mansoni as TGR and Prx (Simeonov et al., 2008). Prx are members of a recently identified family of antioxidants involved in the detoxification of hydrogen peroxide and other hydroperoxides (Chae et al., 1994; Rhee et al., 2005).
S. mansoni parasites survive in humans in part because of a set of antioxidant enzymes that continuously degrade reactive oxygen species produced by the host. A principal component of this defence system has been recently identified as TGR, a parasite-specific enzyme that combines the functions of two human counterparts, GR and TrxR, and as such this enzyme presents an attractive new target for anti-schistosomiasis drug development (Lea et al., 2008).
Summary of Chapters
I. INTRODUCTION AND AIM OF THE WORK: This chapter outlines the global impact of schistosomiasis, explains the biological necessity of TGR for parasite survival, and defines the specific research goals of the study.
II. REVIEW OF LETERATURE: This section provides a comprehensive background on Schistosoma, its pathogenesis, the role of antioxidant enzymes in survival, current diagnostic methods, and the molecular characteristics of TGR.
III. MATERIALS AND METHODS: This chapter details the experimental procedures, including the cultivation of parasites, purification of TGR, production of polyclonal antibodies, and the standardization of the ELISA diagnostic technique.
IV. RESULTS: This section presents the empirical data gathered from protein purification, antibody characterization, and the validation of the sandwich ELISA in human and animal samples.
V. DISCUSSION: This chapter interprets the experimental findings, compares them with existing literature, and evaluates the potential of TGR as both a diagnostic target and a candidate for drug therapy.
VI. SUMMARY: This chapter provides a condensed overview of the entire research project, its methodologies, findings, and the implications for future schistosomiasis control.
VII. REFERENCES: A comprehensive list of all scientific sources and citations utilized throughout the study.
Keywords
S. mansoni, Sandwich ELISA, Diagnosis, TGR, Immunolocalization, Polyclonal antibody, Schistosomiasis, Antioxidant enzymes, Thioredoxin, Glutathione Reductase, Parasite survival, Immunodiagnosis, Sensitivity, Specificity, Oxidative stress.
Frequently Asked Questions
What is the core focus of this research?
The research focuses on the multifunctional enzyme Thioredoxin Glutathione Reductase (TGR) in the parasite Schistosoma mansoni, evaluating its function in parasite survival and its potential utility as a target for diagnosis and drug development.
What are the primary themes addressed in the work?
The work covers the molecular biology of the parasite, the role of antioxidant enzymes, the development of immunological diagnostic tests, and the characterization of specific antibodies.
What is the primary objective of this study?
The primary objective is to purify TGR from S. mansoni and assess whether it can be used as a sensitive, reliable antigen target to diagnose active infections in humans through serum and urine analysis.
Which scientific methods are employed?
The study utilizes biochemical purification techniques (affinity chromatography), immunological assays (sandwich ELISA), histology (immunoperoxidase staining), fluorescence microscopy, and statistical analysis to validate diagnostic accuracy.
What does the main body of the work cover?
It covers the preparation of antigens, the immunization of rabbits to create polyclonal antibodies, the optimization of ELISA protocols, and the testing of these methods against clinical samples from infected patients.
How can the work be characterized by its keywords?
The work is characterized by terms related to parasitology (S. mansoni), biochemistry (TGR, antioxidant enzymes), and clinical diagnostic technology (ELISA, sensitivity, specificity).
Why is TGR considered a unique target in Schistosoma?
Unlike humans, who rely on separate Glutathione Reductase and Thioredoxin Reductase enzymes, S. mansoni uses TGR, a single multifunctional enzyme that performs both functions, making it a distinct and potentially essential drug target.
How did the researchers validate the diagnostic efficacy?
They compared the sensitivity and specificity of their developed TGR-based sandwich ELISA against standard parasitological methods (Kato-Katz and MIFC) using serum and urine samples from confirmed cases of schistosomiasis.
What was the conclusion regarding TGR in different life stages?
The study found that TGR is expressed across all developmental stages of the parasite, confirming its importance for the parasite's survival and validating its potential utility as a universal diagnostic target.
What future research does the author recommend?
The author recommends further investigation into testing TGR specificity against other Schistosoma species, as well as the development of rapid, field-applicable diagnostic tests to overcome the limitations of current laboratory-based ELISA procedures.
- Arbeit zitieren
- Azza El Amir (Autor:in), Somaya El Deeb (Autor:in), 2003, Immunolocalization and Evaluation of Thioredoxin Glutathione Reductase Role in Diagnosis of Human Schistosomiasis, München, GRIN Verlag, https://www.hausarbeiten.de/document/279764
