Chromosome 4 News and Research

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Humans normally have 46 chromosomes in each cell, divided into 23 pairs. Two copies of chromosome 4, one copy inherited from each parent, form one of the pairs. Chromosome 4 spans more than 191 million DNA building blocks (base pairs) and represents more than 6 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 4 likely contains between 1,300 and 1,600 genes.

Genes on chromosome 4 are among the estimated 20,000 to 25,000 total genes in the human genome.

Scientists discover clues to the pancreatic cysts' possible origins

Scientists at Johns Hopkins have surveyed the DNA in four common types of pancreatic cysts, and have determined that each type bears a distinct pattern of gene mutations. Pancreatic cysts are present in about two percent of U.S. adults, and can, in some cases, require surgical removal and microscopic analysis to determine their type and likelihood of turning cancerous.

8 Dec 2011

Established human embryonic cell lines vary from newly derived stem cell lines

Established human embryonic cell lines, including those approved for federal research funding under former President George W. Bush, are different than newly derived human embryonic stem cell lines, according to a study by UCLA stem cell researchers.

2 Dec 2011

Researchers identify first gene associated with frequent herpes-related cold sores

A team of researchers from the University of Utah and the University of Massachusetts has identified the first gene associated with frequent herpes-related cold sores.

1 Dec 2011

Largest survey on genetic, epigenetic stability of stem cells

An international study, published today in the prestigious journal Nature Biotechnology, reveals more about human pluripotent stem cells and their genetic stability and has important implications for the development of therapies using these cells.

29 Nov 2011

Roche NimbleGen, BGI develop Major Histocompatibility Complex region capture technology

Roche NimbleGen, Inc. and BGI, the world's largest genomic organization, announced that they have developed a Major Histocompatibility Complex (MHC) region capture technology based on NimbleGen SeqCap EZ Choice Library, a revolutionary process for the enrichment of the MHC region.

28 Nov 2011

Researchers use baker's yeast to gain insight into chromosome separation process

Researchers at the Stowers Institute for Medical Research used, ironically enough, the single-celled organism Saccharomyces cerevisiae -- commonly known as baker's yeast -- to gain new insight into the process by which chromosomes are physically segregated during cell division.

18 Nov 2011

People with recurrent depression, chronic stress have shorter telomeres in WBCs

People with recurrent depressions or those exposed to chronic stress exhibits shorter telomeres in white blood cells. This is shown by a research team at Umeå University in a coming issue of Biological Psychiatry.

9 Nov 2011

New data from Pfizer's hematology portfolio to be presented at 53rd ASH annual meeting

Pfizer Oncology will present data on a number of investigational compounds from its hematology portfolio, including new data from bosutinib in chronic myeloid leukemia (CML), inotuzumab in non-Hodgkin lymphoma (NHL), as well as the first presentation of clinical data for PF-04449913, which inhibits Smoothened (SMO), a key component of the Hedgehog pathway.

7 Nov 2011

Evolutionary 'breakpoints' on chromosomes may lead to canine cancer

North Carolina State University researchers have uncovered evidence that evolutionary "breakpoints" on canine chromosomes are also associated with canine cancer. Mapping these "fragile" regions in dogs may also have implications for the discovery and treatment of human cancers.

4 Nov 2011

ARIAD reports net income of $13.9 million for third quarter 2011

ARIAD Pharmaceuticals, Inc. today reported financial results for the third quarter of 2011 and provided an update on its corporate developments.

3 Nov 2011

First report on how patterns of 5-hmC's distribution change in mouse brain during development

In 2009, the DNA alphabet expanded. Scientists discovered that an extra letter or "sixth nucleotide" was surprisingly abundant in DNA from stem cells and brain cells.

31 Oct 2011

'Deep sequencing' technology identifies new target area for depression

Scientists at the Texas Biomedical Research Institute and Yale University have identified a new target area in the human genome that appears to harbor genes with a major role in the onset of depression.

29 Oct 2011

Scientists discover Leishmania parasite with juggling chromosomes

Scientists found a deadly parasite with some of its chromosomes in duplicate, others in triplicate, while still others are present four or even five times. Moreover, the copy number varies between individuals. Such a bizarre occurrence has never before been found in nature, in any organism. As a rule, chromosomes should come in couples. The scientists, from the Institute of Tropical Medicine (ITG) and the Wellcome Trust Sanger Institute, made the striking discovery while deciphering the genetic code of a series of Leishmania-parasites.

29 Oct 2011

New discoveries on drug resistance in Leishmania

Two remarkable discoveries were today revealed by researchers into genome analysis of Leishmania parasites. These results uncovered a surprising level of variation at the genome structure level.

28 Oct 2011

C21orf91 gene associated with susceptibility to herpes simplex labialis

Investigators have identified a human chromosome containing a specific gene associated with susceptibility to herpes simplex labialis (HSL), the common cold sore.

28 Oct 2011

A more accurate blood test to detect fetal Downs syndrome launched

Pregnant mothers in the U.S. who wish to know whether they're carrying a fetus with Down syndrome now have access to a commercial genetic blood test that has a 99 per cent accuracy rate.

20 Oct 2011

Scientists discover complex cell mechanism that becomes an obstacle for radiation effectiveness

Researchers from Massachusetts General Hospital, Harvard Medical School and CIC bioGUNE discover a complex cell mechanism activated by a protein —HOXB9— that becomes an obstacle for radiation effectiveness.

20 Oct 2011

New sequencing method can identify genetic variants linked to ASD

Geneticists at Emory University School of Medicine have demonstrated a method that enables the routine amplification of all the genes on the X chromosome. The technology allows the rapid and highly accurate sequencing and identification of novel genetic variants affecting X chromosome genes.

19 Oct 2011

JPO issues new patent for Genprex's lead lung cancer candidate

A new patent covering tumor suppression technologies, including the company's lead product candidate Oncoprex, was recently awarded to The University of Texas System by the Japan Patent Office. Patent number 4813746 pertains to the discovery that chromosome 3p21.3 genes act as cancer suppressors.