Humans normally have 46 chromosomes in each cell, divided into 23 pairs. Two copies of chromosome 7, one copy inherited from each parent, form one of the pairs. Chromosome 7 spans about 159 million DNA building blocks (base pairs) and represents more than 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 7 likely contains about 1,150 genes.
Genes on chromosome 7 are among the estimated 20,000 to 25,000 total genes in the human genome.
Genomics researchers analyzing a rare, serious immunodeficiency disease in children have discovered links to a gene crucial to the body's defense against infections. The finding may represent an inviting target for drugs to treat common variable immunodeficiency (CVID).
Researchers have pinpointed a region in the human genome associated with peanut allergy in U.S. children, offering strong evidence that genes can play a role in the development of food allergies.
Research funded by the National Institutes of Health suggests that changes in a small region of chromosome 6 are risk factors for peanut allergy in U.S. children of European descent. The genetic risk area is located among two tightly linked genes that regulate the presentation of allergens and microbial products to the immune system. This study is the first to use a genome-wide screening approach in patients with well-defined food allergy to identify risks for peanut allergy.
According to the NCCN Clinical Practice Guidelines in Oncology (NCCN Guidelines) for Acute Lymphoblastic Leukemia (ALL), the treatment approach to ALL is one of the most complex and intensive programs in cancer therapy.
A growth hormone can significantly improve the social impairment associated with autism spectrum disorder (ASD) in patients with a related genetic syndrome, according to a pilot study conducted at the Icahn School of Medicine at Mount Sinai and published yesterday on Pub Med, a public database of biomedical topics maintained by the National Institutes of Health (study originally published in the December 12 issue of the journal Molecular Autism).
Researchers at Albert Einstein College of Medicine of Yeshiva University have found a possible clue to why older mothers face a higher risk for having babies born with conditions such as Down syndrome that are characterized by abnormal chromosome numbers.
Duke researchers have demonstrated a genetic therapeutic technique that has the potential to treat more than half of the patients suffering from Duchenne Muscular Dystrophy (DMD).
Scientists at the University of California, San Diego School of Medicine have found that mutations that cause autism in children are connected to a pathway that regulates brain development. The research, led by Lilia Iakoucheva, PhD, assistant professor in the Department of Psychiatry, is published in the February 18 issue of Neuron.
While genomics is the study of all of the genes in a cell or organism, epigenomics is the study of all the genomic add-ons and changes that influence gene expression but aren't encoded in the DNA sequence. A variety of new epigenomic information is now available in a collection of studies published Feb. 19 in Nature by the National Institutes of Health Roadmap Epigenomics Program.
UT Southwestern Medical Center scientists have identified a new biomarker that could help identify patients who are more likely to respond to certain chemotherapies.
Like a car's front and back bumpers, your cell's chromosomes are capped by "telomeres" that protect this genetic material against deterioration. Still, after enough replications, a chromosome's telomeres break down and once they reach a certain point of degradation, the cell dies. This is one reason that cells are mortal: telomeres only last so long. That is, unless the enzyme telomerase builds new material onto the worn telomeres to reinforce these chromosomal "bumpers". Telomere repair can be a good thing, but in some cases it's not: overactive telomerase can lengthen telomeres until a cell becomes immortal…leading to cancer.
Children born with a DNA abnormality on chromosome 16 already linked to neurodevelopmental problems show measurable delays in processing sound and language, says a study team of radiologists and psychologists.
Real-world study findings from France show the significant impact tyrosine kinase inhibitor treatment has had on the survival of patients with Philadelphia chromosome-positive chronic myeloid leukaemia.
Phase I/II clinical trial data support the use of bosutinib as second- or third-line tyrosine kinase inhibitor therapy in Japanese patients with Philadelphia chromosome-positive chronic myeloid leukaemia.
With fast and effective testing techniques, the tissue and cell diagnostics market was estimated to have reached $7.7 billion in 2014 for in vitro diagnostic (IVD) and other reagents used by clinical laboratories, according to Kalorama Information.
For decades, scientists have thought the bacteria that cause the bubonic plague hijack host cells at the site of a fleabite and are then taken to the lymph nodes, where the bacteria multiply and trigger severe disease. But UNC School of Medicine researchers discovered that this accepted theory is off base. The bacteria do not use host cells; they traffic to lymph nodes on their own and not in great numbers.
X-linked intellectual disability is a disorder that predominantly affects men and can have highly variable clinical manifestations. Scientists at the Max Planck Institute for Molecular Genetics in Berlin have found seven new genes that can cause this genetic disease: Mutations of these genes on the X chromosome lead to various forms of intellectual disability.
Among patients with severe aplastic anemia who received stem cell transplant from an unrelated donor, longer leukocyte (white blood cells) telomere length (a structure at the end of a chromosome) was associated with increased overall survival at 5 years, according to a study in the February 10 issue of JAMA.
University of North Carolina scientists have created a new research tool, based on the fruit fly, to help crack the histone code. This research tool can be used to better understand the function of histone proteins, which play critical roles in the regulation of gene expression in animals and plants.
Duke University researchers have devised a method to activate genes in any specific location or pattern in a lab dish with the flip of a light switch by crossing a bacterium's viral defense system with a flower's response to sunlight.
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