Not exact matches
Collaboration based on new findings from the Regeneron Genetics Center ® showing
variant in HSD17B13
gene is
associated with reduced risk
of chronic liver diseases
Variants in the
gene called Telomerase Reverse Transcriptase (TERT) on chromosome 5 that were
associated with older IEAA were also
associated with longer telomeres indicating a critical role for TERT in regulating the epigenetic clock, in addition to its established role
of compensating for cell replication - dependent telomere shortening.
To identify
gene variants associated with musical aptitude, Irma Järvelä at the University
of Helsinki, Finland, and colleagues analysed the genomes
of 767 people assessed for their ability to detect small differences between the pitch and duration
of a sound, and musical pattern.
The archaic - like
variants are
associated with an increase in the activity
of the TLR
genes and with greater reactivity to pathogens.
They discovered that several genetic
variants in the hunter - gatherers were linked to a
gene associated with physical performance, which they hypothesise could be part
of the physiological adaptation to cold.
Reviewing thousands
of genome wide
associate studies (GWAS) to identify genetic
variants in single nucleotide polymorphisms (SNPs), investigators at Dartmouth's Norris Cotton Cancer Center found that some alleles (one
of a pair
of genes located on a specific chromosome) are more frequently risk -
associated with disease than protective.
An estimated 40 percent
of the population has the primary
gene variant associated with celiac disease, but only 1 percent
of people with these
genes go on to develop intestinal inflammation and damage — the hallmarks
of the disease — after ingesting gluten.
The celiac -
associated variant of lnc13 binds poorly to these proteins, leading to increased expression
of inflammatory
genes.
Certain
gene variants are
associated with an increased risk
of disease, but MS is rarely directly inherited.
Genetic tests could one day indicate if patients are predisposed to high levels
of TNF — possibly
associated with the newly identified receptor
gene variant — helping to identify patients that will respond to antibody therapy.
«In the current study, we analyzed dozens
of variants of those
genes and other
genes frequently
associated with obesity risk and saw that, while total fat intake was related to higher BMI, people who were genetically predisposed to obesity and ate the most saturated fat had the highest BMIs.»
Gusella explains that the presence
of two modifying
variants on chromosome 15 — one
associated with symptoms appearing an average
of six years early, the other
associated with an average one - and - a-half-year delay — implies that there may be two actual modifying
variants that both influence one modifier
gene but in opposite directions.
Alzheimer's -
Of the three variants of the ApoE gene, ApoE4 carries the highest risk for late - onset Alzheimer's (other genes are associated with early - onset Alzheimer's
Of the three
variants of the ApoE gene, ApoE4 carries the highest risk for late - onset Alzheimer's (other genes are associated with early - onset Alzheimer's
of the ApoE
gene, ApoE4 carries the highest risk for late - onset Alzheimer's (other
genes are
associated with early - onset Alzheimer's).
In addition to speeding up the development
of brain plaques
associated with Alzheimer's, a
gene variant known as APOE4 also makes tau tangles — another signature
of the disease — worse, researchers report online September 20 in Nature.
Large - scale genomic studies will probably uncover more
gene variants associated with increased risk
of developing PTSD, says de Quervain, and may provide a better understanding
of the molecular mechanisms involved.
The group has also shown that in humans, genetic
variants of the Oprl1
gene are
associated with higher risk
of developing the disorder after exposure to trauma.
Having just one copy
of a particular
variant of a
gene called CREBRF is
associated with a 1.5 increase in BMI.
The increased risk closely correlates with the frequency
of a
gene variant previously
associated with that adverse reaction, supporting recommendations to screen for that
variant in patients from those populations.
When population geneticist Andrea Manica and graduate student Marcos Gallego Llorente at the University
of Cambridge in the United Kingdom analyzed the sequence, they found that the Mota man had brown eyes and dark skin, as well as three
gene variants associated with adaptation to high altitudes; some peaks in the highlands reach 4500 meters, as high as the Matterhorn.
Animal studies have suggested that overactivation
of TLR7 plays a role in lupus, and a
gene variant that increases expression
of the receptor has been
associated with increased lupus risk in human patients.
Among the
gene variants modern humans inherited from Neandertals are ones
associated with higher cholesterol, increased belly fat, rheumatoid arthritis and schizophrenia, researchers learned from analysis
of the new Neandertal DNA.
Interestingly, a
variant of the WNT10A
gene associated with lower levels
of its protein's expression has been linked to a greater likelihood
of male pattern baldness, according to a recent genome - wide association study.
Three simultaneous reports involving more than 32,000 participants uncovered four new diabetes -
associated gene variants, bringing to 10 the number
of known non-Mendelian genetic risk factors for type 2 diabetes.
Results from the analysis confirmed previous findings
of some copy number
variants already
associated with autism, but they also found a host
of other
genes (SHANK2, SYNGAP1, DLGAP2 and the X chromosome — linked DDX53 - PTCHD1 locus) in which mutations seem to be linked to autism.
The
gene for MAO - A has several
variants, some
of which are
associated with relatively higher and lower levels
of enzyme activity.
Now, to enable widespread
gene delivery throughout the central and peripheral nervous systems, Caltech researchers have developed two new
variants of a vector based on an adeno -
associated virus (AAV): one that can efficiently ferry genetic cargo past the blood - brain barrier; and another that is efficiently picked up by peripheral neurons residing outside the brain and spinal cord, such as those that sense pain and regulate heart rate, respiration, and digestion.
A follow - up study
of 96 other patients with Alzheimer's disease confirmed that this HLA
variant is
associated with earlier onset
of Alzheimer's, although Payami cautions that another
gene very close to HLA - A2, and not HLA - A2 itself, could be at fault.
As part
of the International Visible Trait Genetics Consortium, he and his colleagues examined the DNA
of five groups
of people to see whether any particular
variants of a
gene were
associated with each trait.
However, the researchers found that a variation
of ECR47
associated with ADHD disrupted ECR47's ability to bind an important neurodevelopmental transcription factor, YY1 — an indication that the risk
variant interferes with
gene transcription.
«We know that most
of these risk
variants on their own play little role in the development
of MS.. But mapping the collection
of genes associated with MS represents an important advance in efforts to identify the key mechanisms behind its development,» Dr Harbo says.
A decade ago, they also identified a relationship between ALS and excess iron accumulation when they found that 30 percent
of ALS patients in their clinic carried a
variant of a
gene known as HFE that is
associated with iron overload disease.
For the new mouse model, the researchers exposed adolescent mice with at least one copy
of a
variant of the BDNF
gene, which has been
associated with anorexia and anxiety in mice and humans, to social stress and caloric restriction.
A rare
gene variant discovered by UCL (University College London) scientists is
associated with an increased risk
of developing schizophrenia, bipolar disorder and alcoholism, confirms new research.
Clearly, more research is necessary, but this new study adds to the growing and substantial effort to understand how the
gene variants that contribute to the development
of schizophrenia give rise to the cognitive disability commonly
associated with it.
In her most recent study, published in the American Journal
of Medical Genetics in 2006, James found that common
gene variants that support the glutathione pathway may be
associated with autism risk.
Interestingly, the team also found the spread
of two
gene variants associated with celiac disease.
Different versions
of the FRO2
gene («
variants») fell into two groups, those that were
associated with a short root and those that were
associated with a long root.
To find out whether
variants of FRO2 were actually causing the difference (rather than merely being
associated with it), the team grew seeds whose FRO2
gene had been deactivated.
«While this study does not show that these common
gene variants produce schizophrenia per se, it elegantly suggests that these
variants may contribute to declines in intelligence, a clinical feature
associated with schizophrenia,» commented Dr. John Krystal, Editor
of Biological Psychiatry.
Many cluster around sets
of genes associated with growth, including 21
variants found in or near
genes that regulate the building
of bone.
One
of their findings was a
variant in a
gene called Ret that had not been previously
associated with the disease, although other variations in Ret had been fingered as culprits.
The Boulder, Colo., company Atlas Sports Genetics today began selling just that sort
of product: for $ 149, it says it will screen for
variants of the
gene ACTN3, which in elite - level athletes is
associated with the presence
of the muscle protein alpha - actinin - 3.
Among infants with neonatal abstinence syndrome (NAS; caused by in utero opioid exposure),
variants in certain
genes were
associated with a shorter length
of hospital stay and less need for treatment, preliminary findings that may provide insight into the mechanisms underlying NAS, according to a study in the May 1 issue
of JAMA, a theme issue on child health.
The Neurogenomiks research group, linked to the Achucarro Basque Centre for Neuroscience (EHUgroup) and the University
of the Basque Country (UPV / EHU), has just had a research article published in the scientific publication Journal
of Immunology; it details how they have managed to show that the
gene known as ANKRD55 produces 3 different transcripts
of the messenger RNA, and that the genetic
variant associated with MS greatly increases the production
of these transcripts.
The team also found
variants of two neighboring
genes, HERC2 and OCA2, which are
associated with light skin, eyes, and hair in Europeans but arose in Africa; these
variants are ancient and common in the light - skinned San people.
«It is also possible that these data will reveal that some previously identified disease -
associated sequence
variants actually fall within a formerly unrecognized primary miRNA
gene, thereby raising the possibility that such
variants may influence expression
of the encoded miRNA,» Mendell said.
Gene variants associated with GC altered promoters lack immunogenic N - terminal - lacking peptides, enhancing the ability
of gastric tumours to evade the native body's immune response.
Now the biggest - ever genetic study
of mental illness has found 128
gene variants associated with schizophrenia, in 108 distinct locations in the human genome.
Researchers at the U.S. Military HIV Research Program (MHRP) tested whether specific
variants of immune response
genes called HLA were
associated with greater protection against the virus.
Sequencing accelerates the analysis
of cancer
associated alterations in genome sequence such as insertions and deletions, CNVs, inversions, duplications, translocations and
gene fusions, as well as single nucleotide
variants.