British scientists have found that women in the morning who work in the morning and work better, have less chance of developing breast cancer.
Researchers at the University of Bristol say they have not yet found the reason.
The results of the research are important because they refer to all women.
Scientists say the new study, which was presented at the Glasgow Cancer Conference, contributed to a better understanding of the effects of sleep on health.
They all have an internal clock of the body, which sets the 24-hour body rhythm. This is also called the chirality rhythm.
The rhythm affects the whole body – from when this will contribute to us, how we feel, and the possibility of a heart attack.
However, the body observes that it is not shown simultaneously.
Ranorani people, known as "morning" people, get up early, work the best afternoon, and go to bed early in the evening.
Nightwish or "evening type" in the morning is difficult to get up, they are most productive in the afternoons and evenings and are most likely resting in bed late.
What is the relationship with breast cancer?
Scientists say there is a link. In the survey, they used a new and very smart way of data processing – so. Mendelian coincidence.
First, they analyzed segments of human DNA that control whether someone would be a rancher or a nightmare.
Subsequently, the data collected were used in an experiment involving more than 180,000 women involved in the British Biobank project (UK Biobank project) and nearly 230,000 women who participated in the research of the International Breast Cancer Association (Consortium of breast cancer associations).
In this way they have shown that women who have been genetically programmed to get up early have had less chance of getting breast cancer than night time.
These DNA segments – a total of 341 – have been adapted from birth and are not associated with other known causes of cancer, such as excessive obesity. This means that scientists say with great certainty that the body clock affects cancer.
What does that mean?
In the United Kingdom, seven women among them have breast cancer during their lifetime.
But this latest study covered only a short, eight-year lifespan of each of the women involved. It turned out that in these eight years, one in a hundred breast cancer patients will have breast cancer. During the night, this ratio is two to one hundred.
Member of the research team at the University of Bristol dr. Rebecca Richmond told the BBC that these results could be very important because everyone in the world should sleep and can easily change.
"Previous research deals with the impact of night shifts on health. Our research shows that women are at greater risk," says Dr. Richmond.
Year and family health care are among the highest risk factors for breast cancer. British organization Kanser Reserch (UK Cancer Research) says that about 25% of cases can be prevented.
What causes cancer?
Kancer: When learning online is helpful
So if you sleep better – will not you get cancer?
Things are not that simple.
Dr. Richmond tells the BBC that the official advice is too slow.
"We still have to find out why nightmares are a higher risk in early age. We need to clarify this relationship well," explains Dr. Richmond.
"Is the problem in the physical body? Or can the night be worse because they do not live in harmony with the body clock when they have to get up in the morning to go to work? And perhaps the effect of the body clock on hormone levels in the body, the immune system and metabolism also affects the risk of cancer? "he asked dr. Richmond.
Many questions are still waiting for an answer.
Are scientists justified?
Science never guarantees anything 100%, but these results are consistent with existing trends.
The World Health Organization has already warned that sleep disorders caused by night shifts at work are likely to increase the risk of developing cancer.
Dr. Richard Berks from Brest Kanser Nau (Breast cancer now) says that the results of the new research are very interesting.
"They support an increasing number of evidence that there is a certain overlap between genetic predispositions for the risk of developing sleep and breast cancer, but further details of this link need to be explored."
In the past, similar studies have shown a link between sleep and mental health, including the risk of schizophrenia.
Breast Surgery Clinic Kirion, who works at the University of Manchester, says that randomizing Mendelian, which was used in the new study, enabled scientists to investigate a causal relationship between breast cancer and various patterns of sleep.
"These are interesting indicators that once again prove that our body clock and natural sleep rhythm are related to the appearance of breast cancer."
The results of the study were published on the bioRxiv Bio Research website.
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