Video: Why women live longer than men
2024 Author: James Gerald | [email protected]. Last modified: 2023-12-17 14:00
Why is life expectancy for men lower than for women? According to Japanese scientists, it’s not a matter of stress or even lifestyle. On average, women live five years longer than their male counterparts, for the simple reason that this is at the genetic level.
Japanese scientists have shown that genes inherited by mice on the paternal side significantly - by about a third - shorten the life span of animals; researchers believe that it is their influence that explains the shorter life expectancy of men compared to women among all human populations and other mammalian species.
In their work, a group of researchers led by Professor Tomohiro Kono from Tokyo Agricultural University bred two groups of mice, one of which was born as a result of the traditional fertilization of a female by a male, and the second carried only the genes of female chromosomes, artificially combined in the embryonic organism.
The average lifespan of common mice was 655.5 days. Mice born from "two mothers" lived on average 841.5 days (a long-lived mouse belonging to the second group lived 1045 days).
Scientists noted that these mice differed from the representatives of the "traditional" group in lower weight and size. However, despite their apparent "fragility", they had a stronger immune system.
According to the researchers, this is due to the fact that in the development of males there is a "striving" for strength and body weight, while the most important thing for the development of females is their ability to produce healthy offspring.
“Our study for the first time allowed us to at least partially reveal the reasons why the average life span of female mammals is higher than that of males, and how it is affected by the combination of parental genes,” said Professor Kono.
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