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.
A research team at Boston Children's Hospital's Program in Cellular and Molecular Medicine has developed a quality assurance tool for scientists using genome-editing technologies like the increasingly popular CRISPR. The assay, called high throughput genome translocation sequencing (HTGTS), rapidly gauges—for any given gene—these technologies' accuracy and their risk for causing potentially dangerous genomic collateral damage.
Monitoring participants' biological clocks may be the quickest way to determine the effectiveness of experimental drugs currently under development to treat Angelman syndrome: a debilitating genetic disorder that occurs in more than one in every 15,000 live births.
PsA is a common form of inflammatory form of arthritis causing pain and stiffness in joints and tendons that can lead to joint damage. Nearly all patients with PsA also have skin psoriasis and, in many cases, the skin disease is present before the arthritis develops. However, only one third of patients with psoriasis will go on to develop PsA.
In a study to be presented on Feb. 5 in an oral plenary session at 8 a.m. PST, at the Society for Maternal-Fetal Medicine's annual meeting, The Pregnancy Meeting, in San Diego, researchers will report that cell free DNA analysis is less effective than sequential screening as primary testing for fetal chromosomal abnormalities.
Scientists at The Scripps Research Institute have found diverse genomic changes in single neurons from the brains of Alzheimer's patients, pointing to an unexpected factor that may underpin the most common form of the disease.
There are two types of thyroid cells and therefore there are two broad types of thyroid cancer. Medullary carcinoma is derived from parafollicular or C cells, whereas follicular cells give rise to several types of thyroid cancers.
A University of Colorado Cancer Center study published in the journal PLoS One finds alterations in expression of genes PIK3R3 and PTEN, more commonly observed in adult tumors, in the rare, young-adult bone cancer Ewing Sarcoma, potentially offering ways to improve therapy.
Oxford Gene Technology, The Molecular Genetics Company, explores how Sheffield Children's NHS Foundation Trust has seamlessly transferred to its CytoSure ISCA 8x60k platform, in a new case study entitled Evaluating and switching to CytoSure microarrays. As the result of a highly stringent National Health Service tender for the supply of oligo-based cytogenetics research arrays, CytoSure was selected based on the quality of data and analysis software.
Inhibiting the action of a particular enzyme dramatically slows the growth of tumor cells tied to BRCA1 and BRCA2 genetic mutations which, in turn, are closely tied to breast and ovarian cancers, according to researchers at NYU Langone Medical Center.
Copy number variations (deletions or duplications of large chunks of the genome) are a major cause of birth defects, intellectual disability, autism spectrum disorder and other developmental disorders. Still, geneticists can definitively say how a CNV, once discovered in someone's DNA, leads to one of these conditions in just a fraction of cases.
Cypher Genomics, Inc., the leading genome informatics company, and Sequenom, Inc., the leading molecular diagnostics company, today announced a development agreement for next generation noninvasive prenatal tests (NIPT).
A major research study has uncovered several new genetic mutations that could drive testicular cancer - and also identified a gene which may contribute to tumours becoming resistant to current treatments.
William Brinkley, adjunct professor of biology in the UTSA College of Sciences, was recently honored with the E. B. Wilson Medal from the American Society for Cell Biology. The medal, the organization's highest honor for far-reaching contributions to cell biology over a lifetime in science, was presented to Brinkley at the 54th Annual Meeting in Philadelphia.
Scientists have gained new insight into fragile X syndrome -- the most common cause of inherited intellectual disability -- by studying the case of a person without the disorder, but with two of its classic symptoms.
Mutations in a gene that helps repair damaged chromosome ends may make smokers — especially female smokers — more susceptible to emphysema, according to results of a new study led by Johns Hopkins Kimmel Cancer Center researchers.
PF-114, a selective tyrosine kinase inhibitor, is active against native and mutated forms of the BCR–ABL oncogene in Philadelphia chromosome-positive leukaemias, according to preclinical cellular and in vivo results published in Leukemia.
Features of the blast phase, such as blast cell morphology and accompanying cytogenetic changes, vary between chronic myeloid leukaemia patients who received tyrosine kinase inhibitor therapy and those treated in the pre-TKI era, research shows.
The cause of type 1 diabetes remains unknown. Several studies using immunohistochemistry (IHC) have independently reported hyperexpression of human leukocyte antigen (HLA) class I on pancreatic islet cells in young patients with recent-onset type 1 diabetes. Investigators have therefore suggested that HLA hyperexpression may be an important first step in the development of type 1 diabetes.
For a skin cell to do its job, it must turn on a completely different set of genes than a liver cell — and keep genes it doesn’t need switched off. One way of turning off large groups of genes at once is to send them to “time-out” at the edge of the nucleus, where they are kept quiet. New research from Johns Hopkins sheds light on how DNA gets sent to the nucleus’ far edge, a process critical to controlling genes and determining cell fate.
Case Western Reserve researchers have identified a two-pronged therapeutic approach that shows great potential for weakening and then defeating cancer cells.
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