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.

Abnormality on chromosome 17 helps detect breast cancer tumour's response to anthracyclines

British researchers have discovered a new way of detecting which breast cancer patients are going to respond best to chemotherapy that includes anthracycline antibiotics. The study has found that an abnormality on chromosome 17, called CEP17, is not only associated with a worse outcome for patients, but also that its presence is a highly significant indicator that the tumour will respond to anthracyclines. The research will be presented at the European Breast Cancer Conference (EBCC7) Thursday 25th March.

26 Mar 2010

Mapping of all fragile sites of yeast S.cerevisiae may lead to better understanding of cancer development

The research group of Dr. Fran-ois Robert, a researcher at the Institut de recherches cliniques de Montr-al (IRCM), in collaboration with the team of Dr. Daniel Durocher (Samuel Lunenfeld Research Institute and University of Toronto) accomplished a technical breakthrough: they mapped all the fragile sites of a living organism, the budding yeast Saccharomyces cerevisiae. The method used by the researchers can be applied to humans. This study has been published online today in the scientific journal Nature Structural and Molecular Biology.

10 Feb 2010

Data provide key information about epigenetic profiles for gastric cancer

Gastric cancer, one of the most common types of cancer, is associated with high mortality rates. In the last decades, a decrease in the worldwide incidence has been observed with some changes in the therapeutic and diagnostic options.

10 Feb 2010

Study: New mechanism may allow bacteria to develop resistance to antibiotics

Scientists have shown that cells' DNA-reading machinery can skim through certain kinds of damaged DNA without skipping any letters in the genetic "text." The studies, performed in bacteria, suggest a new mechanism that can allow bacteria to develop resistance to antibiotics.

10 Feb 2010

CSHL scientists explain how initiation of DNA replication is coordinated and controlled by kinase proteins

Scientists at Cold Spring Harbor Laboratory (CSHL) have discovered how a protein long known to be an essential activator of DNA replication actually triggers this process in cells.

8 Jan 2010

Transcription factor promotes stem cell proliferation to repair tissue damage

The master regulator of muscle differentiation, MyoD, functions early in myogenesis to help stem cells proliferate in response to muscle injury, according to researchers at Case Western Reserve University. The study appears online Jan. 4 in the Journal of Cell Biology (www.jcb.org).

5 Jan 2010

Enzyme dCK plays a profound role in normal lymphocyte development

Mice without the deoxycytidine kinase (dCK) enzyme have defects in their adaptive immune system, producing very low levels of both T and B lymphocytes, the major players involved in immune response, according to a study by researchers with UCLA's Jonsson Comprehensive Cancer Center.

23 Dec 2009

New step in the proofreading process that helps maintain accuracy of DNA replication identified

Wayne State researchers have for the first time observed the movement of a single molecule of DNA polymerase as it incorporates nucleotides one by one. More significantly, they have identified a previously unknown step that they speculate is part of the proofreading process known to prevent the polymerase from producing cancer-causing mutations.

4 Dec 2009

Health watch: When you eat just as vital to what you eat

When you eat may be just as vital to your health as what you eat, found researchers at the Salk Institute for Biological Studies. Their experiments in mice revealed that the daily waxing and waning of thousands of genes in the liver—the body's metabolic clearinghouse—is mostly controlled by food intake and not by the body's circadian clock as conventional wisdom had it.

25 Nov 2009

Illinois and Michigan teens honored at 2009 Siemens Competition

Research projects in the areas of biology and mathematics scored top marks this evening, as Marissa Suchyta of South Barrington, Illinois and the team of Randy Jia of Rochester Hills, Michigan and David Lu of Bloomfield Hills, Michigan received the highest honors at the Region Three Finals of the 2009 Siemens Competition in Math, Science & Technology, the nation's premier high school science competition.

17 Nov 2009

Some combination drug therapies are counter-productive

Combination drug therapy has become a staple for treating many infections. For instance, doctors treat extensively drug resistant forms of tuberculosis with one drug that breaks down the pathogen's protective barriers and opens the door for another to deliver the deathblow.

16 Nov 2009

Ohio State University researchers first to observe real-time behavior of the Dpo4 enzyme

Scientists here have identified how the motions of an enzyme are related to correctly copying genetic instructions, setting the stage for studies that can uncover what happens when DNA copying mistakes are made.

28 Oct 2009

Potential link exists between histone mRNA formation and apoptosis

A study from the University of North Carolina at Chapel Hill has identified a key player in a molecular process essential for DNA replication within cells.

26 Oct 2009

Response Genetics launches new genetic diagnostic test for gastric cancer

Response Genetics, Inc., a company focused on the development and sale of molecular diagnostic tests for cancer, announced today the availability of its ResponseDX: Gastric™ genetic test panel, a proprietary PCR-based diagnostic test. By analyzing the expression of genes that correlate with response to commonly used chemotherapy agents, physicians can better tailor treatment for their patients with gastric cancer and gastroesophageal (GE) junction cancer.

29 Sep 2009

Researchers make significant advances in the treatment of metastatic malignant melanoma

Researchers have made significant advances in the treatment of metastatic malignant melanoma - one of the most difficult cancers to treat successfully once it has started to spread - according to a study to be presented at Europe's largest cancer congress, ECCO 15 - ESMO 34, in Berlin on Thursday.

23 Sep 2009

Advancements in the treatment of metastatic malignant melanoma

23 Sep 2009

eChIP genetic technique developed to examine FA proteins with DNA crosslinks

While Fanconi anemia (FA) is a rare and dangerous disease, new laboratory research at The University of Texas M. D. Anderson Cancer Center shows it may lead researchers toward clues in more common diseases, including highly hereditary types of breast cancer.

11 Sep 2009

New study on behaviour of telomeres during cell division in cancerous human cells

A process that limits the number of times a cell divides works much differently than had been thought, opening the door to potential new anticancer therapies, researchers at UT Southwestern Medical Center report in the Aug. 7 issue of the journal Cell.

2 Sep 2009

Research reveals that large non-coding RNA in mammals play an important role in telomere maintenance

A team of researchers from The Wistar Institute have shown that a large non-coding RNA in mammals and yeast plays a central role in helping maintain telomeres, the tips of chromosomes that contain important genetic information and help regulate cell division. Since this RNA also facilitates the formation of DNA at telomeres-a process that can protect aging cells and destabilize tumor cells-manipulating its expression may be useful in treating cancer and other diseases.

1 Sep 2009

Discovery of possible mechanisms to protect against genetic alterations, diseases

Peering into the DNA of tiny yeast, researchers at the Moores Cancer Center at the University of California, San Diego and the San Diego Branch of the Ludwig Institute for Cancer Research have pinpointed a large number of genes that can prevent a type of genetic rearrangement that may lead to cancer and other diseases.

6 Aug 2009

DNA Replication News and Research

Further Reading

Abnormality on chromosome 17 helps detect breast cancer tumour's response to anthracyclines

Mapping of all fragile sites of yeast S.cerevisiae may lead to better understanding of cancer development

Data provide key information about epigenetic profiles for gastric cancer

Study: New mechanism may allow bacteria to develop resistance to antibiotics

CSHL scientists explain how initiation of DNA replication is coordinated and controlled by kinase proteins

Transcription factor promotes stem cell proliferation to repair tissue damage

Enzyme dCK plays a profound role in normal lymphocyte development

New step in the proofreading process that helps maintain accuracy of DNA replication identified

Health watch: When you eat just as vital to what you eat

Illinois and Michigan teens honored at 2009 Siemens Competition

Some combination drug therapies are counter-productive

Ohio State University researchers first to observe real-time behavior of the Dpo4 enzyme

Potential link exists between histone mRNA formation and apoptosis

Response Genetics launches new genetic diagnostic test for gastric cancer

Researchers make significant advances in the treatment of metastatic malignant melanoma

Advancements in the treatment of metastatic malignant melanoma

eChIP genetic technique developed to examine FA proteins with DNA crosslinks

New study on behaviour of telomeres during cell division in cancerous human cells

Research reveals that large non-coding RNA in mammals play an important role in telomere maintenance

Discovery of possible mechanisms to protect against genetic alterations, diseases

Expanding research and clinical options for children with cancer

Examining how pain could play a direct protective role in the gut

From Puberty to Menopause: Clue’s CEO, Audrey Tsang on the Power of Femtech

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