The study published in 2006 which claim Alzheimer's Diease is being caused by Aβ*56, was used as basis in thousands of studies in the past two decades, with countless money being invested into the field to develop medicine under this premise.
However, an investigation published on the journal Science found the evidential image in the result of the study was manipulated to reach the conclusion of the paper.
If the study result was indeed fabricated and that the conclusion was untrue, then all the money invested onto developing medicine based on such claim, as well as all the time spent by experts in the field in developing such medicines during such time, are going to be wasted.
Theories are crumbling, another example shows that now serotonin deficiency is not strongly associated with depression. A recent review came out in the journal Molecular Psychiatry that shattered the mainstream theory of depression and gave hope to those who did not respond to selective serotonin reuptake drugs, but simply to antidepressants (
2).