Especially in the Americas, where such an extreme demographic collapse was followed by centuries of mixing by European, Amerindian, and African groups,
the genes of living people «aren't always a faithful representation of what happened in the past,» Salas says.
Not exact matches
Gene therapy has the potential to save
lives, but the pool
of people who suffer from the orphan diseases, or conditions that pharmaceutical companies have historically ignored, is relatively small.
I think when your «disagreement» involves stripping the
people of legal rights, pushing them out
of the public sphere, removing them from the
gene pool, or otherwise wishing to make their
lives difficult..
«When
people have one copy
of a
gene not working, it's a little like taking a drug their entire
lives that is inhibiting this
gene.»
In
living people, a rare mutation that causes members
of a family to produce half the usual amount
of FOXP2 protein also triggers severe speech defects, notes Simon Fisher, director
of the Max Planck Institute for Psycholinguistics in Nijmegen, the Netherlands, who discovered the
gene.
The earliest
of the
gene sequences were taken from four
people of the Boncuklu community, who
lived between 10,300 and 9,500 years ago.
The
genes of extinct hominins called Denisovans
live on in
people from China and Papua New Guinea, suggesting two instances
of cross-species breeding
The classic example is the sickle cell
gene —
people with one copy
of the
gene are strongly protected against malaria but those with two copies
of the
gene develop a
life - threatening condition known as sickle - cell disease.
People with the altered form
of the
gene have at least a 70 per cent chance
of developing colon cancer at some time in their
lives, and women with the
gene also have at least a 50 per cent chance
of developing cancer
of the uterus.
Researchers have identified a group
of immune system
genes that may play a role in how long
people can
live after developing a common type
of brain cancer called glioblastoma multiforme, a tumor
of the glial cells in the brain.
With the passing
of his Apollo 17 crewmate,
Gene Cernan, earlier this year, Schmitt spoke as the last
living person from that mission to have set foot on the moon.
In a 2007 paper published in The Journal
of Allergy and Clinical Immunology Poland and his colleagues reported that
people who have mutations in a
gene for a protein called SLAM produce 70 percent fewer antibodies after
live measles inoculation than
people without the mutation.
Compared with
living people, Neandertals and ancient Siberians known as Denisovans had slightly different patterns
of DNA methylation — a chemical modification
of DNA that doesn't change the information in
genes but helps control
gene activity.
People generally think that our genetic code, and thus the expression patterns
of our
genes, is fixed throughout
life.
By comparing sets
of genes from tens
of thousands
of people, researchers have found some that the body can't seem to
live without.
«
People with the three
gene versions believed to encourage depression had a smaller hippocampus than those with fewer or none
of these
gene versions, even though they had the same number
of stressful
life events,» says study leader Lukas Pezawas, describing the results.
The massive project, carried out by a private company in the country, deCODE genetics, has yielded new disease risk
genes, insights into human evolution, and a list
of more than 1000
genes that
people can apparently
live without.
People living in the Atacama desert
of Chile evolved specific
gene mutations over the past 7000 years that make them better at detoxifying the heavy metal
Thanks to ancient hookups, between 20 and 35 percent
of Neandertals»
genes live on in various combinations from one
person to another.
«Cardiovascular disease presents such a huge impact on
people's
lives that we should leave no stone unturned in the search for the
genes that cause heart attack,» says Cristen Willer, Ph.D., the senior author
of the paper and an assistant professor
of Internal Medicine, Human Genetics and Computational Medicine & Bioinformatics at the U-M Medical School.
Equally importantly, it may become feasible to perform these trials in
people who are HD
gene carriers, but who do not yet show symptoms, by giving evidence for which trials may postpone onset and provide more healthy years
of life,» added Myers.
For example, the Yamnaya
people, who swept out
of Central Asia about 5000 years ago and left their
genes in most
living Europeans and South Asians, appear to have carried cannabis to Europe and the Middle East.
Frances Balkwill begins Amazing Schemes Within Your
Genes by asserting our uniqueness: «Think
of all the
people you know and see every day... then think
of all the
people who
live in villages, towns and cities throughout your country.
For all the advantages
of these extended -
life molecules, the researchers predict that they will be supplanted in perhaps a decade by advances in
gene therapy, which will enable
people with haemophilia to produce their own clotting factors.
On page 386, scientists identify a version
of a
gene that plays a small but significant role in whether or not
people get depressed in response to
life stresses.
Lead researchers Eric Reiman and Pierre Tariot
of the Banner Alzheimer's Institute in Phoenix plan to give a yet - to - be identified anti-amyloid drug, or placebo, to 650
people who carry two copies
of the APOE4
gene — a genetic double whammy that confers a 10-fold increased risk
of developing Alzheimer's late in
life.
They've found new disease risk
genes, insights into human evolution — and a list
of more than 1000
genes that
people can apparently
live without!
The tendency
of more intelligent
people to
live longer has been shown, for the first time, to be mainly down to their
genes by new research published in the International Journal
of Epidemiology today.
And HLA - DQB1 belongs to a family
of genes that regulates proteins critical to the immune system, particularly important given that extreme
living conditions like malnutrition can make
people more susceptible to disease, Yang says.
Now researchers have discovered two new
gene variants that help Tibetans use oxygen more efficiently than
people who
live at low altitudes; natural selection favored these variants in Tibetans, whose ancestors have
lived at high altitude for thousands
of years.
«By evaluating microRNAs in the CSF, it may become feasible to perform these trials in
people who are HD
gene carriers, but who do not yet show symptoms, by giving evidence for which trials may postpone onset and provide more healthy years
of life,» added Myers.
In 2003, Nir Barzilai and Gil Atzmon, who study aging at Albert Einstein College
of Medicine in New York, discovered that
people with a certain polymorphism
of the cholesterol - influencing
gene CETP
lived longer than those without it (ScienceNOW, October 2003).
«Some
people might take the results negatively, as if our potential in
life is limited by our genetic code,» says Paul Thompson
of the University
of Southern California in Los Angeles, who has previously reported the discovery
of genes linked with IQ.
Identifying the effects
of faulty
genes is a vital first step to being able to design drugs that could best help
people living with the condition.
By sequencing a remarkably complete genome from a 50,000 - year - old bone fragment
of a female Neandertal found in Vindija Cave in Croatia, researchers report a new trove
of gene variants that
living people outside
of Africa obtained from Neandertals.
In fact, though many human and mouse
genes appear to be similar, they may have taken on slightly different roles, or be active at different times during the
life of a
person or a mouse.
More than 36 CAG repeats in the huntingtin
gene will always lead to HD symptoms, if a
person lives long enough, and longer CAG repeats tend to produce an earlier age
of onset.
The way that these
genes — this genetic information percolates down into the individual, the way this hierarchy percolates down into an individual might be very different from one
person to another and therefore create the kind
of infinite ripples or variations in human identity that we experience in human
life.
People have more than 22,000
genes, although we don't need all
of them to
live and be healthy.
People who inherit one
of these
gene changes will have a higher risk
of developing cancer at some point in their
life.
All instances
of a
gene mutation that contributes to light skin color in Europeans came from the same chromosome
of one
person who most likely
lived at least 10,000 years ago, according to Penn State College
of Medicine researchers.
On Wednesday we were saddened learned that double Nobel laureate Fred Sanger had died, so it was fitting that yesterday also saw the announcement
of an important scientific advance that owes everything to the molecular biology revolution he helped to launch — one that may improve the
lives of many thousands
of people with Hemophilia A.... Continue reading Successful
gene therapy for hemophilia A in dogs — humans next!
Previous honorees include David Botstein
of Princeton University and Ronald W. Davis and David S. Hogness
of Stanford University School
of Medicine for their seminal contributions to the concepts and methods
of creating a human genetic map, leading to the identification
of thousands
of disease
genes; Julian Adams
of Infinity Pharmaceuticals, Alfred Goldberg
of Harvard Medical School and Kenneth Anderson and Paul Richardson, both
of Dana - Farber Cancer Institute, for the development
of bortezomib, a drug that has altered the
lives of hundreds
of thousands
of people with multiple myeloma; Alain Carpentier
of Hôpital Européen Georges Pompidou in Paris and Robert S. Langer
of MIT for innovations in bioengineering.
(If
life is like a board game, the pieces are the
genes a
person is born with — and the moves
of the game are environmental factors.)
They analyze the
genes, cultures and cognitive abilities
of people living today and compare them with those
of apes and extinct
peoples.
Although the focus is to improve care and help seniors stay in their homes longer, the study will also record the genetic information
of participants and could lead to the discovery
of common
genes in
people who
live longer.
(Inside Science)-- Researchers have long questioned the role
genes and the environment play in shaping the contours
of person's
life.
Gregory says that editing mutant HD
genes works in the brains
of living mice, not just cells - good news for moving towards
people.
Hereditary Ataxias are genetic, which means they are caused by a defect in a certain
gene that is present from the start
of a
person's
life.
Understanding these phylum - specific innovations and the differences between free
living and parasitic species might provide clues to adaptations to parasitism, and would be relevant for
gene - silencing technology development for parasitic flatworms that infect hundreds
of million
people worldwide.