Quantitative Analyses of all Influenza Type A Viral Hemagglutinins and Neuraminidases using Universal Antibodies in Simple Slot Blot Assays

Caroline Gravel; Changgui Li; Junzhi Wang; Anwar M Hashem; Bozena Jaentschke; Gary Van Domselaar; Runtao He; Xuguang Li

doi:10.3791/2784

Количественный анализ всех гриппа типа Вирусный Hemagglutinins и нейраминидазы использованием уни...

JoVE Journal
Immunology and Infection

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JoVE Journal Immunology and Infection

Quantitative Analyses of all Influenza Type A Viral Hemagglutinins and Neuraminidases using Universal Antibodies in Simple Slot Blot Assays

Количественный анализ всех гриппа типа Вирусный Hemagglutinins и нейраминидазы использованием универсального антител в простом Анализы Blot Слот

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13:12 min

April 4, 2011

DOI: 10.3791/2784-v

Caroline Gravel*¹, Changgui Li*², Junzhi Wang², Anwar M Hashem^1,3,4, Bozena Jaentschke¹, Gary Van Domselaar⁵, Runtao He⁵, Xuguang Li^1,3

¹Centre for Vaccine Evaluation, Biologics and Genetic Therapies Directorate, HPFB,Health canada, ²National Institute for the Control of Pharmaceutical and Biological Products,The State Food and Drug Administration, Beijing, ³Department of Biochemistry, Microbiology and Immunology,University of Ottawa, ⁴Microbiology Department, Faculty of Medicine,King Abdulaziz University, ⁵National Microbiology Laboratory,Public Health Agency of Canada

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Overview

This article presents a novel slot blot method for quantifying influenza viral hemagglutinin and neuraminidase. The method utilizes universal antibodies that target conserved sequences, offering a reliable alternative for viral quantification.

Key Study Components

Area of Science

Virology
Immunology
Quantitative Analysis

Background

Influenza viruses are significant pathogens affecting public health.
Hemagglutinin (HA) and neuraminidase (NA) are critical proteins for viral infectivity.
Quantification of these proteins is essential for vaccine development.
Conserved epitopes provide a target for universal antibodies.

Purpose of Study

To develop a method for the quantitative determination of HA and NA in vaccines.
To utilize antibodies that target conserved epitopes for improved detection.
To enhance the sensitivity of detection through sample dilution.

Methods Used

Identification of conserved epitopes through bioinformatics.
Sample dilution to improve detection sensitivity.
Assembly of the slot blot apparatus for sample loading.
Detection of HA or NA using universal antibodies.
Quantification of HA or NA by densitometry.

Main Results

The slot blot method effectively quantifies HA and NA.
Universal antibodies demonstrated high specificity and sensitivity.
The method provides a viable alternative for viral protein quantification.
Results support the use of this method in vaccine analysis.

Conclusions

This innovative slot blot method is a valuable tool for influenza research.
Targeting conserved sequences enhances the reliability of quantification.
The approach may facilitate better vaccine development strategies.

Frequently Asked Questions

What is the significance of quantifying HA and NA?

Quantifying HA and NA is crucial for assessing vaccine efficacy and monitoring viral load.

How do universal antibodies improve detection?

Universal antibodies target conserved epitopes, ensuring specificity across different viral strains.

What are the steps involved in the slot blot method?

The method involves identifying epitopes, diluting samples, loading them into the apparatus, detecting proteins, and quantifying results.

Can this method be applied to other viruses?

While designed for influenza, the principles may be adapted for other viral quantifications.

What is densitometry?

Densitometry is a technique used to measure the intensity of light passing through a sample, allowing for quantification of proteins.

How does this method compare to traditional techniques?

This method offers improved sensitivity and specificity compared to some traditional techniques, making it a valuable alternative.

Простой метод блот слот был разработан для количественной оценки гриппа вирусного гемагглютинина и нейраминидазы с использованием универсальных антител ориентации их наиболее сохраняется последовательности, выявленных в ходе анализа биоинформатики. Этот инновационный подход может обеспечить полезную альтернативу количественное определение всех вирусных гемагглютинина и нейраминидазы.

Общая цель этой процедуры заключается в количественном определении содержания вируса гриппа гемагглютинина и нейраминидазы в вакцинах с использованием антител, нацеленных на консервативные эпитопы. Это достигается путем предварительного выявления консервативных эпитопов. Вторым этапом процедуры является разбавление образцов образца образца и образца вакцины для повышения чувствительности обнаружения.

Третьим этапом является сборка аппарата для блоттинга и загрузка образцов в слоты. Четвертым этапом процедуры является обнаружение ГК или НК на мембране с использованием соответствующих универсальных антител. Заключительным этапом процедуры является количественное определение количества ГК или НК с помощью денситометрии.

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