🤩 Why Are Cancer and Alzheimer's Rarely Seen Together?

Doctors have long noticed a strange pattern: cancer and Alzheimer's disease rarely occur in the same person. For decades, this was considered almost an anecdote from medical practice, but statistics have confirmed the observation. An analysis of data from 9.6 million patients conducted in 2020 showed that a cancer diagnosis was associated with an 11% reduction in the incidence of Alzheimer's disease.

Experiments on mice by scientists from Huazhong University of Science and Technology in China suggest that a special protein called cystatin C, produced by cancer cells, may be responsible.

Normally, in Alzheimer's disease, clumps of misfolded proteins accumulate in the brain, damaging neurons. Cystatin C is able to penetrate the brain and interfere with neurodegeneration by breaking up these harmful clusters.

Moreover, this protein activates immune cells in the brain, prompting them to literally "clean up the debris." In mice, this not only reduced the characteristic plaques but also improved cognitive performance. Previously, it was thought that triggering such a protective mechanism was extremely difficult.

It's important to understand: this doesn’t mean that cancer protects against Alzheimer's. All conclusions so far are based only on animal studies, and applying them to humans requires caution. Nevertheless, the idea itself is surprising: some destructive processes in the body may partially suppress others.

@hiaimediaen