Humans normally have 46 chromosomes in each cell, divided into 23 pairs. Two copies of chromosome 8, one copy inherited from each parent, form one of the pairs. Chromosome 8 spans about 146 million DNA building blocks (base pairs) and represents between 4.5 percent and 5 percent of the total DNA in cells.
Identifying genes on each chromosome is an active area of genetic research. Because researchers use different approaches to predict the number of genes on each chromosome, the estimated number of genes varies. Chromosome 8 likely contains between 700 and 1,100 genes.
Genes on chromosome 8 are among the estimated 20,000 to 25,000 total genes in the human genome.
Conventional wisdom among scientists for years has suggested that because individuals with Down syndrome have an extra chromosome, the disorder most likely results from the presence of too many genes or proteins contained in that additional structure.
Enzo Biochem, Inc., a vertically integrated biotechnology company engaged in the research, development, manufacture, licensing and marketing of innovative health care products, platforms and services based on molecular and cellular technologies, announced today a supply and distribution agreement between Enzo Life Sciences and privately-owned Cancer Genetics Inc., a leading producer of nucleic acid products used in genomic research.
In a breakthrough that may help fill a critical need in stem cell research and patient care, researchers at Mount Sinai School of Medicine have demonstrated that skin cells found in human amniotic fluid can be efficiently "reprogrammed" to pluripotency, where they have characteristics similar to human embryonic stem cells that can develop into almost any type of cell in the human body. The study is online now and will appear in print in the next issue of the journal Cellular Reprogramming, to be published next month.
A large study from Children's Hospital Boston and the Boston-based Autism Consortium finds that a genetic test that samples the entire genome, known as chromosomal microarray analysis, has about three times the detection rate for genetic changes related to autism spectrum disorders (ASDs) than standard tests. Publishing in the April issue of Pediatrics (and online March 15), the authors urge that CMA become part of the first-line genetic work-up for ASDs.
A puzzle that has baffled scientists for centuries - why some birds appear to be male on one side of the body and female on the other - has been solved by researchers.
A research team led by the University of Colorado at Boulder has discovered a previously unknown cellular "switch" that may provide researchers with a new means of triggering programmed cell death, findings with implications for treating cancer.
If you can imagine identical twin sisters at rest, their breath drawing them subtly together and apart, who somehow latch onto ropes that pull them to opposite sides of the bed-you can imagine what happens to a chromosome in the dividing cell.
Researchers from four laboratories that perform diagnostic genetic testing of chromosome abnormalities in individuals with unexplained physical and developmental disabilities recently identified a previously unrecognized genetic disorder.
Individuals with a certain type of genetic susceptibility to lung cancer face a greatly increased risk for the deadly disease with even a small exposure to cigarette smoke, a study team that includes researchers from the University of Cincinnati has concluded.
Human herpesvirus 6 (HHV-6) infects nearly 100 percent of humans in early childhood, and the infection then lasts for the rest of a person's life. Now, a team led by Peter Medveczky, MD, a professor in the Department of Molecular Medicine at the University of South Florida, has discovered that in some individuals, HHV-6 causes such a permanent infection by inserting or "integrating" its DNA into human chromosomes.
The gene for a newly recognized disease has been identified thanks to the determination of an Amish father and the clinical skills and persistence of Indiana University and Riley Hospital for Children physicians in collaboration with physicians and researchers at the Clinic for Special Children in Lancaster County, Penn., which specializes in disorders of the Amish.
Research Down Syndrome has launched an international outreach program to focus awareness and support for the rapidly advancing area of biomedical research leading to safe and effective approved medical therapies to treat cognitive impairment in individuals of all ages with Down syndrome -- improving memory, learning and communication.
Scientists have identified a region of a human chromosome that is associated with eosinophilic esophagitis (EoE), a recently recognized allergic disease. People with EoE frequently have difficulty eating or may be allergic to one or more foods. This study further suggests that a suspected so-called master allergy gene may play a role in the development of this rare but debilitating disorder.
Pediatrics researchers have identified the first major gene location responsible for a severe, often painful type of food allergy called eosinophilic esophagitis (EoE). In this disease, which may cause weight loss, vomiting, heartburn and swallowing difficulties, a patient may be unable to eat a wide variety of foods.
ARIAD Pharmaceuticals, Inc. today announced that its investigational pan-BCR-ABL inhibitor, AP24534, has been granted orphan drug designation by both the U. S. Food and Drug Administration (FDA) and the European Medicines Agency (EMA). In the U.S., the orphan designation of AP24534 is for the treatment of chronic myeloid leukemia (CML) and Philadelphia chromosome-positive acute lymphoblastic leukemia (Ph+ ALL) and in the E.U., its orphan designation is for CML and acute lymphoblastic leukemia.
Genetic diseases affect an estimated 12 million Americans, yet according to a survey of 1,000 people conducted by the Genetic Disease Foundation (GDF), while two-thirds of those surveyed were willing to and saw the benefits of undergoing genetic testing, close to 80 percent had never talked to their physician about genetic screening – an inconsistency that can have serious implications on a person's overall health and the health of their immediate family members.
Between 5 and 10 percent of babies with Down syndrome develop a transient form of leukemia that usually resolves on its own. However, for reasons that haven't been clear, 20 to 30 percent of these babies progress to a more serious leukemia known as Down syndrome acute megakaryoblastic leukemia (DS-AMKL), which affects the blood progenitor cells that form red blood cells and platelets.
For people who carry common gene variants, cigarette smoking greatly increases the risk that a blood vessel in the brain will weaken and balloon out - called an aneurysm - which could be life-threatening if it ruptures, according to research presented at the American Stroke Association's International Stroke Conference 2010.
Researchers have found that one particularly aggressive type of blood cancer, mixed lineage leukemia (MLL), has an unusual way to keep the molecular motors running. The cancer cells rely on the normal version of an associated protein to stay alive.
Ferring Pharmaceuticals and Gene Security Network announced that they have signed an agreement to conduct a clinical trial of GSN's advanced preimplantation genetic diagnosis (PGD) technology, Parental Support™.
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