Amantadine Nitrate Multi-Target Neuroprotection
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Solution Overview
Problem
Current treatments for Alzheimer's disease are limited, with only four acetylcholine esterase inhibitors and one NMDA receptor inhibitor available, which can only relieve symptoms and not cure the disease, and do not effectively address neurodegenerative processes.
Innovation Solution
Development of amantadine nitrate compounds with multiple pharmacophores that inhibit NMDA receptors, release nitric oxide, inhibit calcium influxes, and scavenge free radicals, providing neural protection and potentially treating a range of neurodegenerative diseases.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If single-target drug molecules (acetylcholine esterase inhibitors or NMDA receptor inhibitors) are used to treat Alzheimer's disease, then some clinical symptoms can be relieved, but the neurodegenerative process cannot be blocked and the disease cannot be cured
Solution Approach 1:
The patent applies the multi-functionality principle by designing amantadine nitrate compounds that simultaneously perform multiple functions: NMDA receptor antagonism, nitric oxide release, calcium channel blocking, and free radical scavenging. This single molecule addresses multiple pathogenic mechanisms of Alzheimer's disease, transforming a single-target approach into a multi-functional therapeutic agent that can block neurodegenerative processes while relieving clinical symptoms
Solution Approach 2:
The patent merges multiple pharmacophores into a single amantadine nitrate compound structure. The compound combines the NMDA receptor antagonist activity of amantadine with nitrate groups that release nitric oxide, creating a unified molecule that integrates several therapeutic mechanisms previously requiring separate drugs, thereby achieving curative effects through combined actions
2Reliability
If nitric oxide is introduced to increase NO content in the body, then therapeutic effect is significantly enhanced, but NO is very unstable in the body and can easily react with free radicals
Solution Approach 1:
The patent applies preliminary action by pre-attaching nitrate groups to the amantadine molecule structure before administration. These nitrate groups serve as reservoirs that release nitric oxide in situ within the body, ensuring stable delivery and controlled release of NO to the target site, thereby overcoming the instability issue of free NO while maintaining enhanced therapeutic effects
Solution Approach 2:
The amantadine nitrate compound acts as an intermediary carrier that stabilizes nitric oxide delivery. The nitrate groups attached to the amantadine scaffold serve as stable intermediaries that protect the labile NO groups until they reach the target site, where they then release therapeutic levels of NO to combat oxidative stress and free radical damage
3Adaptability or versatility
If multiple pharmacophores are incorporated into the same molecule, then functions of inhibiting NMDA, releasing NO, inhibiting calcium influxes, removing radicals and neuro-protection are achieved, but the device complexity increases
Solution Approach 1:
The patent employs multi-functionality by designing the amantadine nitrate compound to inherently possess multiple therapeutic activities within a single molecular framework. The core amantadine structure provides NMDA receptor antagonism and calcium channel blocking, while attached nitrate groups provide NO release and free radical scavenging, achieving multi-target therapy without requiring complex combinations of separate molecules
Solution Approach 2:
The patent creates a composite molecular structure by combining different pharmacophoric elements (amantadine core with nitrate substituents) into a single hybrid compound. This molecular composite integrates the beneficial properties of each component: the neuroprotective and calcium-blocking properties of amantadine with the NO-donating and antioxidant properties of nitrate groups, achieving synergistic multi-target effects
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 amantadine nitrate compounds demonstrate multifunctional mechanisms for neural protection, reducing toxicity and side effects, and can be used to treat Alzheimer's disease, Parkinson's disease, stroke, and other neurodegenerative conditions by inhibiting excessive NMDA receptor activation and oxidative stress.
Implementation Method 1
Introduction of a NO releasing group in a small molecule drug, such as in nitroglycerin, may increase NO content in the body
Implementation Method 2
Nitric oxide molecules can penetrate the cell wall into the smooth muscle cells
Implementation Method 3
Nitric oxide (NO) also has a variety of biological activities in the body, and has a function of signaling molecules
Implementation Method 4
The NMDA receptor is an important subtype of excitatory amino acid ionic glutamate receptors in central nervous system... When the NMDA receptor channel is opened, some cations, such as Ca 2+
Implementation Method 5
Nitric oxide, as a free radical gas with an unpaired electron, is very unstable in the body and can easily react with free radicals, and thus can reduce the number of free radicals
Implementation Method 6
Amantadine is widely used in the treatment of influenza and Parkinson's disease... The compounds may have functions of inhibiting NMDA, releasing NO, inhibiting calcium influxes
Data Source
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AI summary
The present invention relates to amantadine nitrate compounds having neural protective effect, and preparation method and medical use thereof. The compounds have the structure of the general formula (I). The compounds have multifunctional mechanisms, including inhibiting NMDA receptors, releasing NO, inhibiting calcium influxes, and having protective effects on cells particularly neurocytes. The compounds can be used in the preparation of medicaments having a cellular protective effect, for prevention or treatment of the diseases related to such as NMDA receptors and elevation of calcium anions in cells, including the diseases related to neurodegeneration such as Alzheimer's disease, Parkinson's disease, cerebral paralysis and glaucoma, and the diseases related to cardio-cerebral-vascular system such as Parkinson's syndrome combined with cerebral arteriosclerosis, as well as respiratory tract infections caused by influenza virus.