DNA Replication News and Research

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DNA replication, the basis for biological inheritance, is a fundamental process occurring in all living organisms to copy their DNA. This process is "semiconservative" in that each strand of the original double-stranded DNA molecule serves as template for the reproduction of the complementary strand. Hence, following DNA replication, two identical DNA molecules have been produced from a single double-stranded DNA molecule. Cellular proofreading and error-checking mechanisms ensure near perfect fidelity for DNA replication.

HIF-1α protein can work directly to stop new cells from forming

A protein known for turning on genes to help cells survive low-oxygen conditions also slows down the copying of new DNA strands, thus shutting down the growth of new cells, Johns Hopkins researchers report. Their discovery has wide-ranging implications, they say, given the importance of this copying - known as DNA replication - and new cell growth to many of the body's functions and in such diseases as cancer.

23 Feb 2013

Researchers discover SCANR that helps protect a cell's genes against DNA interlopers

Gene wars rage inside our cells, with invading DNA regularly threatening to subvert our human blueprint. Now, building on Nobel-Prize-winning findings, UC San Francisco researchers have discovered a molecular machine that helps protect a cell's genes against these DNA interlopers.

15 Feb 2013

Three Robert Wood Johnson members win Edward J. Ill Excellence in Medicine Awards

Three members of the University of Medicine and Dentistry of New Jersey-Robert Wood Johnson Medical School faculty have been named 2013 recipients of the prestigious Edward J. Ill Excellence in Medicine Awards, highlighting their expertise as exceptional educators or researchers.

1 Feb 2013

G-quadruplexes also exist within the human genome

In 1953, Cambridge researchers Watson and Crick published a paper describing the interweaving 'double helix' DNA structure - the chemical code for all life.

21 Jan 2013

Oncogene-induced senescence could play a key role in future cancer therapy

Cell aging, or cellular senescence, has an important role in the natural physiological response to tumor development. Activated oncogenes are able to induce senescence, and recent findings have suggested that oncogene-induced senescence (OIS) could play a key role in future cancer therapy.

12 Dec 2012

FAC PET identifies liposarcoma tumors that are sensitive to chemotherapy

Liposarcoma, the most common type of sarcoma, is an often lethal form of cancer that develops in fat cells. It is particularly deadly, in part, because the tumors are not consistently visible with positron emission tomography (PET) scans that use a common probe called FDG and because they frequently do not respond to chemotherapy.

11 Dec 2012

Combination of PD-991 and letrozole improves survival in patients with HER2- breast cancer

Pfizer Inc. today announced randomized Phase 2 data that showed PD-0332991 (PD-991) in combination with letrozole significantly extended progression free survival (PFS) compared with letrozole alone in post-menopausal patients with estrogen receptor positive (ER+), human epidermal growth factor receptor 2 negative (HER2-) locally advanced or metastatic breast cancer.

6 Dec 2012

Scientists sequence DNA of biopsied tissue from colon polyps

The causes underlying the development of certain types of common cancers have not yet been elucidated. In order to better determine the origin and the sequence of events responsible for the onset of colon cancer, the teams led by Thanos Halazonetis and Stylianos Antonarakis, professors at the University of Geneva (UNIGE), Switzerland, have sequenced the DNA of biopsied tissue from colon polyps.

2 Dec 2012

Certain mutated cells continue DNA replication process even after drug treatment

Certain mutated cells keep trying to replicate their DNA - with disastrous results - even after medications rob them of the raw materials to do so, according to new research from USC.

21 Nov 2012

New gene delivery vehicle opens route to the heart of cells in solid tumors

There are plenty of effective anticancer agents around. The problem is that, very often, they cannot gain access to all the cells in solid tumors. A new gene delivery vehicle may provide a way of making tracks to the heart of the target.

15 Nov 2012

Triapine shows promise in treating breast cancer

Students at Tennessee Tech University are developing and testing a series of chemical compounds that show promise of stopping cancer in its tracks.

29 Oct 2012

UNM Cancer Center scientist to continue histone modification study

While every one of our cells contains all of our genetic information, each type of cell uses only specific parts of that information to make its proteins. Uncovering more about the mechanism that directs which particular pieces of genetic information the cell uses is the research focus of Mary Ann Osley, PhD, University of New Mexico Professor of Molecular Genetics and Microbiology and Co-Leader of the Cancer Biology and Biotechnology Program at the UNM Cancer Center.

24 Oct 2012

EmbryoScope Time-lapse system identifies abnormal development events in embryos

Which embryos have the best opportunity to develop into a viable pregnancy? A new technology provides a surprising answer. A major challenge in the field of IVF is selecting the single best embryo which is likely to result in a live birth. Currently, embryologists must remove the embryo from a standard incubator to perform 2 or 3 short evaluations of the developing embryo under the microscope, at fixed time-points over 3-5 days, in order to assess embryo quality prior to transferring an embryo to the patient.

18 Sep 2012

Molecular insight into oxygen sensing mechanism

The study of an oxygen-sensing bacterial regulatory protein by chemistry researchers at the University of Georgia has provided molecular insight into the oxygen sensing mechanism, which could ultimately lead to a better understanding of the ageing process and new treatments for human diseases such cancer, Parkinson's and Alzheimer's.

12 Sep 2012

DNA synthesis in the 3’ and 5’ direction possible using new template-directed method

When a cell divides, it passes on genetic information by producing copies of its DNA. Chemists have also learned to copy DNA. In the journal Angewandte Chemie, a German team has now introduced a new copying technique that uses a single strand of DNA as the “master copy”, like a cell, but does not require enzymes.

30 Aug 2012

Parental methylated histones not transferred to daughter DNA

It's widely accepted that molecular mechanisms mediating epigenetics include DNA methylation and histone modifications, but a team from Thomas Jefferson University has evidence to the contrary regarding the role of histone modifications.

24 Aug 2012

Orc1 mutations may explain pathology in manifestations of Meier-Gorlin syndrome

Research published Aug. 1 by scientists at Cold Spring Harbor Laboratory (CSHL) links gene mutations found in some patients with Meier-Gorlin syndrome (MGS) with specific cellular dysfunctions that are thought to give rise to a particularly extreme version of dwarfism, small brain size, and other manifestations of abnormal growth which generally characterize that rare condition.

1 Aug 2012

Microbiologists reveal how T. brucei’s key proteins organize to replicate its mtDNA

A group of diseases that kill millions of people each year can't be touched by antibiotics, and some treatment is so harsh the patient can't survive it. They're caused by parasites, and for decades researchers have searched for a "magic bullet" to kill them without harming the patient. Now, a team of microbiologists at the University of Massachusetts Amherst has made an advance that could one day lead to a new weapon for fighting parasitic diseases such as African sleeping sickness, chagas disease and leishmaniasis.

11 Jul 2012

Study reveals new information about origin of tumors

A study by Travis H. Stracker, researcher at the Institute for Research in Biomedicine (IRB Barcelona), in collaboration with scientists at the Memorial Sloan Kettering Cancer Center (MSKCC) in New York, reveals new information about the origin of tumors.

7 Jun 2012

Researchers identify mechanism by which Zds1 protein regulates key function in mitosis

Researchers from the Bellvitge Biomedical Research Institute (IDIBELL) have identified the mechanism by which protein Zds1 regulates a key function in mitosis, the process that occurs immediately before cell division.

19 May 2012