Los cánceres pediátricos presentan mutaciones diferentes a las de los adultos, hecho que explicaría el fracaso de algunas terapias en niños.
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Hearing or vision loss is often part of aging, but a new study suggests that lose function in both directions (it has to be both, not just one) would increase the risk of suffering from dementia and cognitive decline after a few years.
Both directions simultaneously
The study examined 6,520 people between the ages of 58 and 101. Visual and hearing impairment was determined using a questionnaire that asked about the use of glasses or hearing aids.
At the beginning of the study, 932 people had normal vision and hearing, 2,957 had visual or hearing impairments, and 2,631 said they had both impairments.
Dementia was more than twice as common in the group with both impairments at the start of the study. In that group, 201 people out of 2,631, or 8%, had dementia at the start of the study, compared to 2.4% with a sensory disability and 2.3% without a sensory disability.
Researchers tested people's thinking and memory skills every two years for six years using a test that includes word recall and recognition. They then looked at the relationship between having a hearing or visual impairment and dementia and having both impairments and dementia.
After adjusting for factors such as sex, education and income, the researchers found that the hearing and vision impaired group was twice as likely to develop dementia than the group with normal sensory function.
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The news
Dementia and cognitive decline could be closer if you lose hearing and vision, according to new study
was originally published in
Xataka Science
by
Sergio Parra
.
In terms of biological aging, the body appears to change phase three times during our lifetime: at 34 years, at 60 years and at 78 years.
In other words, there is evidence that aging is not a progressive process that moves at the same speed throughout our lives, but rather is punctuated by peaks (or rather, valleys).
Blood protein levels: the proteome
The investigation has been published in Nature Medicine, and has also presented a new way to reliably predict people's ages using protein levels (the proteome) in your blood.
The team analyzed blood plasma data from 4,263 people between 18 and 95 years old, studying the levels of around 3,000 different proteins.
While these protein levels often remain relatively constant, the researchers found that large changes in readings for multiple proteins occurred around young adulthood (34 years), late middle age (60 years), and old age (78 years). years).
According to Tony Wyss-Coray, from the Stanford Alzheimer's Disease Research Center:
We have known for a long time that measuring certain proteins in the blood can tell you about a person's health status, for example lipoproteins for cardiovascular health.
The researchers were able to set up a system whereby the mixture of 373 selected proteins in blood could be used to accurately predict a person's age, within about three years or so: When the system failed to predict an age that was too young, the subject was usually very healthy for his or her age.
Another finding from the study offers more evidence of something that has long been suspected: that men and women age differently. Of the 1,379 proteins that changed with age, 895 (nearly two-thirds) were significantly more predictive for one sex compared to the other.
These findings could help us better understand how our bodies begin to break down as we age, and how specific age-related diseases, including Alzheimer's disease or cardiovascular diseases, could be better addressed.
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The news
373 selected proteins in blood could be used to accurately predict a person's age
was originally published in
Xataka Science
by
Sergio Parra
.
Con células embrionarias de ranas se hacen pequeños robots, o xenobots, que se mueven libremente, curan sus lesiones y crean sus propios comportamientos de grupo.
Not only the liver metabolizes ethanol: astrocytes in the cerebellum are directly involved, as seen in mice.
Nunca antes se había detectado radiación X en el gigante helado. Los investigadores consideran tres posibles causas: la luz solar, las auroras del planeta o su sistema de anillos.
Female hormones participate in the mechanism of action of the compound, so the effect is only observed in female mice.
Lucy Jones She is a renowned seismologist who has worked with the United States Geological Survey (USGS), so she knows a lot about disasters. That's why he wrote Disasters: How Catastrophes Shape History.
A book where it narrates, chapter by chapter, some of the great catastrophes that have devastated the Earth and what they have revealed about the human condition.
Gross changes
Each of these catastrophes changed the functioning of the society that lived in its range of action. Due to the greater density and complexity of our cities, the risk is also increasing: More people than ever are at risk of losing the infrastructure that makes life possible.
Disasters: How great catastrophes shape our history (Essay)
The disasters covered by Jones range from the fire and brimstone rain of Pompeii in AD 79 to the Tohoku Island earthquake in Japan in 2011.
Earthquakes, floods, tsunamis, hurricanes, and volcanoes come from the same forces that give life to our planet. Earthquakes give us natural springs; Volcanoes produce fertile soils. Only when these forces exceed our ability to resist them do they become disasters. Together they have shaped our cities and their architecture; they have raised leaders and overthrown governments; They have influenced the way we think, feel, fight, unite or pray. The history of natural disasters is our own history.
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The news
Books that inspire us: 'Disasters: How Catastrophes Shape History', by Lucy Jones
was originally published in
Xataka Science
by
Sergio Parra
.
El planeta rocoso GJ 1132b, de tamaño similar a la Tierra, podría haber desarrollado una atmósfera secundaria gracias a la actividad volcánica.
Las nubes muy frías son una señal de que viene una tormenta fuerte. Pero ahora unos cumulonimbos han superado incluso a los huracanes y han marcado un nuevo récord gracias a unas circunstancias poco frecuentes.