Sunday, August 20, 2017 12:34:05 AM
This statement means very little in the 'real multi-dimensional complicated world of natural bio-mechanisms.' Clearly, A2-73 has been described as an activator of S1 in a very specific way, causing S1 to take positive steps to correct a cellular level problem. (The analogy was alerting a firetruck. S1 as a firetruck where A2-73 is the call to action.) If some other noise is louder and more easily heard by the fire brigade does not mean that sound will call to action mobilization of the fire brigade.
It is the effect of the drug or interaction of the drug with the S1 receptor that matter. If one were to yell in anger at his wife and children
their ears would hear that sound more surely and clearly than sweet words barely whispered. When the whispered words were heard they would more likely have a positive effect. The negative side effects of yelling angry words even louder at one's family to be heard would likely increase with the volume. But increasing the volume of the sweet loving words to overcome the loader sound (higher binding affinity) of the TV would likely not have negative effects due to the increased volume.
The importance of Donepezil higher binding affinity might be when it is co-administered with A2-73. Theoretically this could inhibit A2-73 action by dominating the receptor site. Apparently what has been found is if the dose of Donepezil is reduced to a specific dose or ratio then the two drugs work together. Anavex now has a patent for the A2-73/Donepezil combination drug that will be formally issued and day now.
The efficacy of the drug will be shown by clinical trials and the measurement of the affinity to S1 is not relevant especially in a drug with the safety profile of A2-73.
Arguments that other drugs have a higher affinity for S1 so maybe better
than A2-73 is a Red Herring and is oversimplified failed logic. That would make as much sense as a counselor telling someone to yell as his family in anger to promote a harmonious family life. Or for Doctors to RX cocaine or meth-amphetamine for cognitive impairment. (also drugs with a relatively high affinity to S1)
Remember what Dr George Perry MD renowned ALZ researcher and Editor of the Journal of the Alzheimer's Assoc. had to say about A2-73. Measure that against the failed and flimsy logic of a Frroll or OFP.
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