Dengue-specific B-cell epitopes identified by phage-display library

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Journal name: The Malaysian Journal of Medical Sciences
Original article title: Identification of Dengue-specific B-Cell Epitopes by Phage-display Random Peptide Library
The Malaysian Journal of Medical Sciences (MJMS) is a peer-reviewed, open-access journal published online at least six times a year. It covers all aspects of medical sciences and prioritizes high-quality research.
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Original source:

This page is merely a summary which is automatically generated hence you should visit the source to read the original article which includes the author, publication date, notes and references.

Author:

Nevis Amin, Alicia Aguilar, Frank Chamacho, Yaime Vázquez, Maritza Pupo, Juan Carlos Ramirez, Luis Izquierdo, Felix Dafhnis, David Ian Stott, Ela Maria Perez, Armando Acosta


The Malaysian Journal of Medical Sciences:

(A peer-reviewed, open-access journal)

Full text available for: Identification of Dengue-specific B-Cell Epitopes by Phage-display Random Peptide Library

Year: 2009

Copyright (license): CC BY 4.0


Download the PDF file of the original publication


Summary of article contents:

Introduction

Dengue is a significant human viral disease predominantly transmitted by arthropods, with millions of cases occurring annually, leading to severe complications like dengue hemorrhagic fever and fatalities. The disease is caused by four closely related dengue virus serotypes, belonging to the Flaviviridae family. Advances in detection methods are critical, and the development of effective vaccines poses challenges, particularly due to the risk of severe outcomes during secondary infections. Techniques such as the use of random peptide libraries presented on phage (RPL) have emerged as valuable tools for identifying sequences that mimic pathogenic epitopes, aiding in the creation of diagnostic and vaccine strategies against dengue.

Identification of B-cell Epitopes from Dengue Virus

In this study, peptides resembling B-cell epitopes of the dengue virus were identified from a phage-peptide library through affinity selection with human sera containing antibodies against dengue. A total of 18 phage clones were isolated, out of which eight demonstrated strong reactivity against antibodies targeting the four dengue serotypes. The selected clones showed specific binding, with four of them significantly inhibiting the interaction between anti-dengue antibodies and the virus. Notably, two peptides emerged from the sequences of NS3 and NS4B, two non-structural proteins of the dengue virus, which suggested their potential as diagnostic tools or vaccine candidates.

Conclusion

The findings of this research highlight the efficacy of phage-display technology in identifying dengue virus epitopes, making strides in the direction of developing diagnostic assays and vaccines. The discovered peptides, with their structural resemblance to non-structural proteins NS3 and NS4B, underline the potential for targeted immunological applications against dengue. However, further investigations are required to assess these mimotopes' immunogenicity and their role in secondary dengue infections, contributing to the understanding and management of this global health concern.

FAQ section (important questions/answers):

What is the significance of the identified peptides in dengue research?

The identified peptides resemble B-cell epitopes of dengue virus, which may lead to improved diagnostic tools and potential vaccines. They could specifically aid in differentiating between primary and secondary dengue infections.

How were the phage clones selected from the library?

Eighteen clones were isolated through affinity selection using polyclonal human antisera against dengue virus type 3. They were evaluated for reactivity through various immunological assays including ELISA.

What methods were used to confirm the reactivity of clones?

The reactivity of phage clones was confirmed via ELISA, competitive inhibition assays, and statistical analyses, ensuring they specifically bind to antibodies from dengue virus-positive sera.

What role does NS3 and NS4B play in dengue infection?

NS3 and NS4B are non-structural proteins of dengue virus. They are involved in immune responses and could be potential targets for vaccine development due to their conserved regions across serotypes.

Glossary definitions and references:

Scientific and Ayurvedic Glossary list for “Dengue-specific B-cell epitopes identified by phage-display library”. This list explains important keywords that occur in this article and links it to the glossary for a better understanding of that concept in the context of Ayurveda and other topics.

1) Viru (Vīṟu):
Viru refers to a classification of infectious agents, specifically viruses, which are pathogens that can cause a variety of diseases, including dengue. Understanding the viral structure and behavior is critical for developing vaccines and diagnostic tools to combat viral diseases, enhancing public health responses globally.

2) Fever:
Fever is a common symptom associated with infections, including dengue. It signifies the body’s response to pathogens, playing a role in the immune mechanism. Classifying the types of fever can aid in diagnosing dengue and other diseases, informing treatment decisions and outbreak management strategies.

3) Disease:
Disease refers to any abnormal condition affecting an organism's body or functions. Dengue is an example of a viral disease transmitted by mosquitoes, manifesting symptoms that can lead to severe health outcomes. Understanding diseases aids in developing effective preventive measures, treatments, and public health policies.

4) Study (Studying):
Study signifies the systematic investigation or analysis of a subject, such as scientific research into dengue viruses. In the context of public health, studies are essential for gaining insights into disease mechanisms, epidemiology, and the efficacy of vaccines or treatments, ultimately guiding health interventions.

5) Similarity:
Similarity in biological research, especially in viral studies, indicates how closely related proteins or peptides are across different strains or species. Identifying similarities among pathogen proteins helps in developing vaccines that provide cross-protection or diagnostic tests that detect multiple virus serotypes effectively.

6) Table:
Table in scientific literature is used to organize and present data clearly for comparison and easy understanding. In the context of the study, tables are utilized to summarize experimental results, such as ELISA reactivity data, facilitating interpretation and highlighting significant findings regarding antibody interactions.

7) Milk:
Milk, often used in laboratory analyses, serves as a blocking agent in enzyme-linked immunosorbent assays (ELISA) to reduce non-specific binding. In diagnostic studies, such as those on dengue, milk enhances assay sensitivity and specificity by ensuring that antibody reactions accurately reflect true positive interactions.

8) Nature:
Nature refers to the inherent characteristics and behaviors of organisms, including viruses. Understanding the nature of dengue viruses, such as their structure and immune response interactions, is essential for developing effective vaccines and treatments, highlighting the complexity of pathogen-host relationships in infectious diseases.

9) Animal:
Animal models are crucial in biomedical research for understanding human diseases, including dengue. Studying animals can provide insights into disease progression, immune responses, and can test the efficacy of vaccines. Although animal models have limitations, they offer a controlled environment to explore pathogenic mechanisms.

10) Life:
Life encompasses the biological processes and systems of living organisms, including the interactions among pathogens, hosts, and the environment. In virology, understanding life cycles of viruses like dengue is essential for developing strategies to prevent infections and manage disease outbreaks effectively.

11) Pur (Pūr):
Poor often describes the inadequacy of resources, treatment, or health outcomes, especially in the context of public health. In the study of dengue, socio-economic factors that lead to poor disease management or increased susceptibility in certain populations are crucial for tailoring effective public health interventions.

12) Purification:
Purification refers to the process of isolating specific substances from a mixture, such as extracting viral proteins for diagnostics. In dengue research, purification techniques are vital for obtaining antigens needed for vaccine development and enhancing the quality and reliability of serological testing.

13) Observation:
Observation in scientific research involves systematically watching and recording behaviors or changes in subjects, such as patients with dengue. Observational studies can yield valuable data on disease progression, treatment responses, and epidemiological patterns, which are essential for preventing and controlling the spread of infectious diseases.

14) Medicine:
Medicine encompasses the science and practice of diagnosing, treating, and preventing diseases. Understanding the principles of medicine is crucial for developing effective treatments for dengue, guiding clinical practices, and informing public health policies aimed at managing outbreaks and protecting communities.

15) Epidemic:
Epidemic refers to an increase in disease cases above the normal level in a specific area. Dengue epidemics pose significant public health challenges. Understanding the dynamics of epidemics can guide timely interventions, resource allocation, and inform strategies for vaccination and disease prevention.

16) Surface:
Surface relates to the exterior aspects of structures, including virus particles. In virology, surface proteins are significant for their role in host interactions and immune recognition. Identifying and studying surface proteins of dengue are pivotal for vaccine development and understanding pathogenesis.

17) Science (Scientific):
Science is the systematic enterprise that builds and organizes knowledge about the universe through observation and experimentation. In the context of dengue, scientific studies and methodologies play a critical role in understanding the virus, its effects, and developing preventive measures like vaccines.

18) Havana:
Havana refers to the capital city of Cuba, where significant research on dengue is conducted. The geographical and environmental conditions of Havana influence dengue transmission patterns. Research and findings from such locales contribute to broader understandings of dengue dynamics and public health responses.

19) Family:
Family in biological taxonomy is a rank that groups related organisms; in this context, the Flaviviridae family includes dengue viruses. Understanding virus classification helps researchers identify cross-reactive epitopes and develop diagnostics and treatments tailored to specific viral characteristics and behaviors.

20) Field:
Field often refers to the area of study or research, particularly in scientific contexts. In the context of public health or virology, field studies are critical for understanding the epidemiology of diseases like dengue, assessing risk factors, and evaluating the effectiveness of control measures.

21) Death:
Death signifies the end of life, often resulting from severe diseases like dengue hemorrhagic fever. Understanding mortality rates associated with dengue is crucial for public health planning and response, informing prevention strategies and healthcare resource allocation to reduce disease burden.

22) Guti:
Guti may refer to a surname or part of a name, possibly related to researchers or contributors in the study. Understanding the impact of various researchers named here highlights collaborative efforts in scientific discoveries, especially in the realm of infectious disease research.

23) Jana (Jāna, Jaṅa):
Jana may refer to an individual’s name or part of a name within the research community. Acknowledging contributions from diverse researchers emphasizes the collaborative nature of scientific inquiry, essential for tackling complex health challenges like dengue and other infectious diseases.

24) Devi (Devī):
Devi is commonly a name reflecting cultural significance. In research contexts, names of contributors, such as authors or significant researchers, illustrate the collaborative and diverse efforts in advancing knowledge about diseases like dengue and highlighting different perspectives in scientific exploration.

25) King:
King may refer to a researcher or an individual involved in studies related to dengue. The recognition of contributors enhances the understanding of scientific collaboration in solving health issues, ensuring that vital research efforts are properly attributed to those who conduct them.

26) Peng:
Peng could refer to researchers whose work contributes to the study of dengue or related fields. Recognizing individual researchers signifies the importance of interdisciplinary collaboration, bringing diverse expertise and perspectives to address public health challenges posed by infectious diseases like dengue.

27) Rice (Ṛce):
Rice refers to a common surname or could signify influential individuals in the field of virology. Acknowledging contributions from diverse backgrounds is essential in scientific research, fostering collaborative efforts to better understand and combat diseases such as dengue.

28) Burning (Burn, Burned, Burnt):
Burn may refer to a surname of a researcher involved in the study or a metaphorical expression in research discussions. Recognizing contributions in academic literature reflects the significance of collaborative work in addressing public health issues related to viral diseases.

29) Post:
Post often relates to after a specific point in research, such as post-experimental analysis. In the context of dengue studies, post-analysis of data helps interpret findings, guiding future research directions, and refining strategies for disease prevention and management.

30) Drug:
Drug refers to substances used in the treatment or prevention of diseases. In the context of dengue, developing effective antiviral drugs remains a significant challenge, emphasizing the need for ongoing research into therapeutic options that can safely and effectively manage dengue virus infections.

31) Cai (Caī, Caí):
Chai could refer to a researcher's name associated with studies in viral diseases, showcasing the collaborative nature of scientific research. Recognizing authorship and contributions is vital for acknowledging the collective efforts essential for advancing our understanding of diseases like dengue.

Other Science Concepts:

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Discover the significance of concepts within the article: ‘Dengue-specific B-cell epitopes identified by phage-display library’. Further sources in the context of Science might help you critically compare this page with similair documents:

Elisa, Disease prevention, Complex system, Dengue Virus Protein, Dengue virus, Escherichia coli, Experimental parameters, Diagnostic tool, False-positive, Polymerase Chain Reaction (PCR), Positive control, Negative control, Alkaline phosphatase, Dengue hemorrhagic fever, Dengue serotype, Dengue fever, Secondary infection, Dengue Haemorrhagic Fever, Tissue Culture, B-cell epitope, Immunogenicity, Percent inhibition, DNA sequencing, Antigenic determinants, Monoclonal antibodies, Cross-reactivity, IgM antibodies, IgG antibodies, Vaccine development, Primary infection, Antibody Response, Amino acid sequence, Non-structural proteins, West Nile Virus, Flaviviruses, Antibody dependent enhancement, Monoclonal antibody, Polyclonal antibodies, Diagnostic kit, Antibody detection, Synthetic peptide vaccine, Dengue patients, Serological diagnosis, T cell response, Competitive inhibition, Arboviruses, Similarity search, Goat anti-human IgG, Serum Antibodies, BLAST program.

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