L-Glucose Gold Complex for Selective RF Hyperthermia
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Solution Overview
Problem
Existing methods for hyperthermia treatments using RF waves face challenges in selectively targeting cancer cells, particularly deep-seated tumors like pancreatic cancer, and conventional anticancer agents cause significant side effects due to non-specific action on normal cells.
Innovation Solution
A L-glucose derivative represented by General Formula (1) is developed, which can be selectively incorporated into cancer cells, enhancing heating efficiency through RF waves and minimizing toxicity to normal cells by containing gold atoms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional anticancer agents are used to treat cancer, then cancer cells can be suppressed, but normal cells are also affected causing strong side effects
Solution Approach 1:
The patent applies local quality by creating a compound with asymmetric structure where only the L-glucose enantiomer is biologically active. The L-glucose derivative is selectively incorporated into cancer cells through their altered metabolic pathways, while normal cells that prefer D-glucose are spared. This enantiomeric selectivity creates local action specificity, allowing the toxic gold atom component to affect only cancer cells and not normal cells, thereby resolving the contradiction between cancer cell suppression and normal cell protection.
Solution Approach 2:
The patent employs inversion by using L-glucose instead of the naturally occurring D-glucose. Since normal cellular metabolism is adapted to D-glucose, L-glucose and its derivatives are not recognized by normal cell transporters and metabolic enzymes. Cancer cells, however, have altered metabolism that allows them to incorporate L-glucose derivatives. This inverted approach reverses the normal biochemical recognition pattern, enabling selective cancer cell targeting while protecting normal cells from the toxic effects of the gold atom component.
2Temperature
If RF waves are used for hyperthermia treatment, then cancer cells can be heated, but surrounding normal cells are also heated reducing energy efficiency
Solution Approach 1:
The patent applies local quality by incorporating gold atoms into the L-glucose derivative structure. Gold atoms have unique electromagnetic properties that enable them to absorb RF energy and convert it to heat through localized surface plasmon resonance. When the L-glucose-gold derivative is selectively incorporated into cancer cells, the heating effect becomes localized to cancer cells only, while normal cells remain unaffected. This resolves the contradiction by achieving cancer cell heating effectiveness without the energy waste of heating surrounding normal cells.
Solution Approach 2:
The patent uses composite materials by combining L-glucose (a carbohydrate) with gold atoms to create a metal-carbohydrate complex. This composite structure integrates the selective cellular uptake capability of L-glucose with the RF energy absorption capability of gold atoms. The resulting L-glucose-gold derivative serves dual functions: it acts as a selective carrier that targets cancer cells and as an RF absorption enhancer that generates heat when exposed to RF waves. This composite approach resolves the contradiction between heating effectiveness and energy efficiency by concentrating the heating effect only where the composite material is located in cancer cells.
3Reliability
If L-glucose derivative with gold atoms is used, then selectivity to cancer cells improves, but complexity of compound structure increases
Solution Approach 1:
The patent resolves the complexity issue by creating a composite material that combines two relatively simple components: L-glucose (a well-known carbohydrate with 6 carbon atoms) and gold atoms. The L-glucose-gold derivative maintains the basic glucose backbone structure, which is biologically familiar and relatively simple, while incorporating gold atoms at specific positions (such as replacing a hydroxyl group or attaching as a nanoparticle). This composite approach achieves high cancer cell selectivity through the L-glucose portion's selective uptake by cancer cells, while the gold component provides the desired therapeutic effect, all within a structure that is not excessively complex.
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 L-glucose derivative selectively targets cancer cells, improving heating efficiency during hyperthermia treatments while reducing side effects on normal cells, offering a safer and more effective cancer treatment option.
Implementation Method 1
heating efficiency due to RF waves improves as shown in the Examples, so that the L-glucose derivative can function as a sensitizing drug
Data Source
AI summary
Provided is an L-glucose derivative represented by General Formula (1) below:wherein X1 represents a —SAuR1 group, and X2, X3, X4 and X5 each independently represent an —OR2 group, an —NH2 group, or a fluorine atom; and R1 represents a ligand and R2 represents a hydrogen atom or an organic group.