dsRNA Stabilization in Beehives Using Beeswax Carriers

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Solution Overview

Problem

Varroa destructor mites pose a significant threat to bee colonies due to their ability to transmit viruses and develop resistance against existing treatments, and dsRNAs used to control them are prone to degradation by beehive microbiota, necessitating a method to stabilize these nucleic acids.

Innovation Solution

A composition comprising a nucleic acid molecule complementary to Varroa destructor mRNA, combined with food-grade preservatives like sodium benzoate and potassium sorbate, is administered to the beehive to enhance stability and efficacy against Varroa mites.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If dsRNA is applied to control Varroa mites, then mite population is suppressed, but dsRNA is rapidly degraded by beehive microbiota

Engineering Contradiction:

Improveefficacy of dsRNA against Varroa mitesVSAvoidstability of dsRNA in beehive

Core Design Contradiction:

ReliabilityVSDuration of action of stationary object

Solution Approach 1:

The patent uses beeswax as an intermediary carrier to deliver dsRNA to Varroa mites. The beeswax matrix protects dsRNA from degradation by beehive microbiota while allowing controlled release and delivery to the target mites through bee grooming behavior and mite feeding activities.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent changes the physical state and delivery parameters of dsRNA by incorporating it into beeswax pellets. This transformation from direct liquid/solution form to embedded solid matrix form fundamentally alters the degradation kinetics and stability profile of the dsRNA in the beehive environment.

Inventive Principle:

Principle #35Parameter changes

2Reliability

If synthetic miticides are used to control Varroa mites, then mite population is reduced, but resistance develops rapidly

Engineering Contradiction:

Improveefficacy of miticide treatmentVSAvoidresistance development of Varroa mites

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The patent replaces chemical miticide mechanisms with a biological RNA interference mechanism. Instead of using synthetic chemicals that select for resistant mite populations, the system uses dsRNA that triggers silencing of essential mite genes, a mechanism that does not induce resistance in the same way chemical pesticides do.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent changes the mode of action parameter from chemical toxicity to biological gene silencing. This fundamental parameter change in the control mechanism eliminates the resistance development problem associated with synthetic miticides while maintaining effective mite population suppression.

Inventive Principle:

Principle #35Parameter changes

3Reliability

If synthetic pesticides are used to control Varroa mites, then mite population is reduced, but bee health is negatively impacted

Engineering Contradiction:

Improveefficacy of pest controlVSAvoidimpact on bee health

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent applies local quality by making the dsRNA treatment highly specific to Varroa mites through gene-targeted RNA interference. The beeswax carrier and specific gene targeting ensure that the active agent acts locally on mites rather than systemically on all hive inhabitants, thereby protecting bee health while maintaining pest control efficacy.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent substitutes broad-spectrum chemical pesticides with highly specific biological RNAi molecules delivered through a bee-friendly beeswax matrix. This replacement eliminates the harmful side effects on bee health while maintaining effective Varroa mite control through specific gene targeting.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

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

The proposed solution effectively stabilizes dsRNAs, maintaining their potency and ensuring prolonged activity within the beehive, thereby reducing Varroa mite populations and improving bee colony health.

Implementation Method 1

RNA interference is a promising technology that can be used to control bee viruses and Varroa mites. The active RNA molecules are processed by the Varroa destructor intracellular RNAi machinery, resulting in Varroa mite mortality and/or disruption of Varroa mite physiological processes

Methodology Applied

Scientific EffectRNA interference:

Implementation Method 2

Methodology Applied

Scientific EffectPreservative action: Preservative

Data Source

PatentUS20240138418A1Methods and compositions for control of arthropod pests

Publication Date: 2024.05.02 GREENLIGHT BIOSCIENCES INC

AI summary

The present disclosure also relates to compositions and methods relating to reducing the potency of arthropods using double-stranded RNA and agents to control pests of bees and beehives.