痴呆症 z-bo 2020-10-20 334

　　The most misunderstood terms in biology are the most suitable survival and the most suitable survival. Researchers from the University of California stated in the latest research report published in the international journal PNAS that natural selection of humans may be more inclined . Maintain good cognitive and memory skills in old age so that grandparents can obtain genetic protection against the development of dementia, so that the elderly can spread their wisdom and care for their children and grandchildren. People with dementia need to take care of themselves, although they may be encouraged.

　　This grandmother's hypothesis follows the rule of relative selection (blood removal). That is, individuals can continue their genes. This can be accomplished not only by passing down the offspring, but also by passing it easily to offspring with genetic mutations. This seems to be selfish, such as why ants cross bridges to let relatives cross obstacles, and why squirrels warn loudly. For humans, grandparents will experience it. To teach offspring specific survival skills to increase the chances of survival for offspring children. In the past breeding season, the only mammals that lived were humans and toothed whales. Killer whales can survive after menopause. This may be because the environment can be used to teach baby whales how to steal food and survive. The same is true for humans. We followed the same evolutionary path until the emergence of Alzheimer's disease, which impaired the cognitive ability of the elderly. In this article, researchers look for new gene mutations that can counteract Alzheimer's predisposition. Finally, they first coded a receptor that maintains inflammation and immune response, such as "C" with CD33. I found a gene called. Although alleles are related to the development of early dementia, the "A" alleles can protect the body's cognitive ability by promoting microglia to absorb excessive β-amyloid protein. In this study, the researchers identified 10 mutated genes that can protect the body from the development of vascular dementia. The 10 genes are APOE, AGT, SCG2, CAPN10, TCF7L2, EBF1, COX-. 2. CYP3A5, PPARG and PON1, vascular dementia often hinder blood flow. These 10 genes can protect the human body from high blood pressure, type 2 diabetes and cardiovascular disease. Researchers have also found it in modern Africans. These genes that are derived to protect the opposite indicate that these genes have existed for at least 100,000 years.

　　Finally, the researcher Ganeux pointed out that our research has not proved that these factors are involved in the selective screening process of CD33, APOE and other gene protection variants. But in the end, it helps to speculate on the possibility of this phenomenon. Intergenerational care and communication are both important factors for the survival of the younger generations of the family and the wider social network and tribe. Later researchers were also very happy to establish a new genetic testing team, which will help detect new genes that can resist dementia.