Vanadate-Polyol Inhibitor Synergy for Phosphatase Assays

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Solution Overview

Problem

Current vanadium-containing inhibitors of phosphatase enzymes require high concentrations to achieve effective inhibition, and are negatively affected by compounds like EDTA and DTT, which are commonly used in biochemical assays.

Innovation Solution

The use of vanadate-containing compounds in combination with polyols, such as glycerol or mannitol, at a molar ratio of 1:1 or greater, enhances the inhibitory effect on phosphatases while counteracting the negative effects of EDTA and DTT.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If vanadate-containing compounds are used to inhibit phosphatase enzymes, then phosphatase activity is reduced, but high concentrations are required to achieve effective inhibition

Engineering Contradiction:

Improveinhibitory effectVSAvoidconcentration of vanadate

Core Design Contradiction:

ReliabilityVSQuantity of substance

Solution Approach 1:

The patent combines vanadate-containing compounds with polyols (such as glycerol, mannitol, or sorbitol) to create a composite inhibitory system. This combination produces a synergistic effect where the polyol enhances the inhibitory potency of vanadate, allowing effective phosphatase inhibition at lower vanadate concentrations than would be required alone.

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The polyol acts as an intermediary substance that mediates between the vanadate compound and the phosphatase enzyme. The polyol appears to form a complex with vanadate or facilitate its interaction with the enzyme, thereby amplifying the inhibitory effect and reducing the amount of vanadate needed.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If vanadate-containing compounds are used to inhibit phosphatase enzymes, then phosphatase activity is reduced, but effectiveness is diminished in the presence of compounds like EDTA and DTT

Engineering Contradiction:

Improveinhibitory effectVSAvoidnegative effects of EDTA and DTT

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The polyol is introduced to counteract the harmful effects of EDTA and DTT before they can interfere with vanadate's inhibitory action. The polyol appears to protect the vanadate-phosphatase interaction from being disrupted by these commonly used biochemical additives, maintaining inhibition effectiveness even when EDTA or DTT are present in the assay.

Inventive Principle:

Principle #9Preliminary anti-action

Solution Approach 2:

The patent transforms the situation where EDTA and DTT normally reduce vanadate effectiveness into a beneficial scenario. By combining vanadate with polyol, the system becomes resistant to these compounds, allowing researchers to use EDTA and DTT in their assays without compromising phosphatase inhibition, thus converting a previously harmful interaction into a robust, interference-resistant system.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

Data Source

PatentUS8563263B2Enhancement of vanadium-containing phosphatase inhibitors

Publication Date: 2013.10.22 ROCHE DIAGNOSTICS OPERATIONS INC

AI summary

The present invention is directed to a composition comprising a vanadium-containing phosphatase inhibitor and a polyol. In the presence of the polyol the effect of the inhibitor is enhanced, even in the presence of chelating agents or reducing agents. The invention also concerns the use of the inventive composition for inhibiting a phosphatase, as well as kits comprising the composition.