Boosted Flow Cytometry HIV T Cell Response Monitoring
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Solution Overview
Problem
Current methods for assessing HIV-specific T cell responses are limited in sensitivity and comprehensiveness, particularly in detecting poly-functional responses and non-classical effector functions, which are crucial for understanding immune control of HIV infection.
Innovation Solution
The method combines 'boosted' flow cytometry with toggle peptides to detect multiple cytokines simultaneously, including those characteristic of Th1 and Th2 responses, providing a more comprehensive assessment of HIV-specific T cell immunity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional flow cytometry or ELISPOT methods are used to detect HIV-specific T cell responses, then the assay is simpler to perform, but the sensitivity and comprehensiveness of detection is limited
Solution Approach 1:
The patent combines multiple cytokine detection capabilities into a single flow cytometry assay by detecting both Th1 (IFN-γ, TNF-α, IL-2) and Th2 (IL-4, IL-5, IL-6, IL-10, IL-13) cytokines simultaneously in the same sample, thereby improving detection comprehensiveness without requiring multiple separate assays
Solution Approach 2:
The flow cytometry method is designed to detect multiple types of T cell responses (Th1, Th2, and poly-functional) using a universal assay platform, allowing detection of diverse cytokine profiles through standardized fluorescently-labeled antibodies and multi-color flow cytometry
2Adaptability or versatility
If only IFN-γ production is measured by ELISPOT, then the assay protocol is simpler, but the assessment of poly-functional T cell responses is incomplete
Solution Approach 1:
The assay merges detection of multiple cytokine types (Th1 and Th2) and multiple functional parameters (cytokine secretion and degranulation) into a single comprehensive flow cytometry experiment, enabling assessment of poly-functional T cell responses that cannot be obtained by measuring IFN-γ alone
Solution Approach 2:
The patent adds functional dimensionality to cytokine detection by simultaneously measuring intracellular cytokines and surface degranulation markers (CD107a), providing a multi-dimensional assessment of T cell effector function that goes beyond traditional single-parameter assays
3Quantity of substance
If conventional flow cytometry detects cytokines in separate channels, then the analysis is more straightforward, but the number of detectable cytokines is limited
Solution Approach 1:
The assay combines detection of multiple Th1 and Th2 cytokines into a single flow cytometry run by using multiple fluorescent channels simultaneously, allowing quantification of up to 13 different cytokines and functional markers in one experiment through spectral flow cytometry or multi-color detection
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach significantly enhances the detection of specific lymphocyte T responses, particularly in highly exposed persistent seronegative subjects, and allows for the identification of functional differences between HIV controllers and non-controllers, offering a more sensitive and comprehensive evaluation of T cell responses compared to traditional assays.
Implementation Method 1
the levels of the plurality of cytokines are determined by boosted flow cytometry, said boosted flow cytometry comprising detecting, at the same time, several cytokines in the same channel of fluorescence
Data Source
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AI summary
The invention relates to a method and a diagnostic kit for monitoring HIV specific T cell responses and identifying subjects capable of controlling HIV progression or preventing HIV infection altogether. The method is based on the combined use of boosted flow cytometry and toggle peptides and can cover a vastly larger set of effector functions than standard assays. The method is also suitable to detect T cell responses of any desirable cytokine or combination of cytokines to any pathogen.