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.

Scientists identify possible therapeutic strategy for reducing leukemia risk from chemotherapy

A UCSF-led team has discovered at least one key reason why blood stem cells are susceptible to developing the genetic mutations that can lead to adult leukemia. Their finding also may explain, they say, why some other age-related hematological disorders develop.The study, reported in "Cell Stem Cell" and reviewed in Cell Stem Cell and Cell, opens a new frontier for studying the molecular underpinnings of adult leukemia.

17 Aug 2010

Researchers discover genetic alterations responsible for Kabuki syndrome

Using a new, rapid and less expensive DNA sequencing strategy, scientists have discovered genetic alterations that account for most cases of Kabuki syndrome, a rare disorder that causes multiple birth defects and mental retardation. Instead of sequencing the entire human genome, the new approach sequences just the exome, the 1-2 percent of the human genome that contains protein-coding genes.

16 Aug 2010

RPA70 associated with SUMO-specific protease facilitates DNA repair: Research

A team of investigators led by a physician-scientist at The University of Texas MD Anderson Cancer Center has shown for the first time that the small protein SUMO can team up with the replication protein A (RPA) complex to facilitate DNA repair. The study is published in the Aug. 13 edition of the journal Molecular Cell.

13 Aug 2010

Research finding uncovers alternative treatments for people with hereditary colorectal cancer

By solving the three-dimensional structure of a protein involved in repairing DNA errors, a group of McMaster University researchers have revealed new avenues to develop assessment tools and alternative treatments for people living with hereditary colorectal cancers.

9 Jul 2010

DNA damage caused by UVA radiation leads to melanoma

A new study by researchers at NYU School of Medicine found that UVA radiation damages the DNA in human melanocyte cells, causing mutations that can lead to melanoma. Melanocytes, which contain a substance called melanin that darkens the skin to protect it from the ultraviolet rays of the sun, are more vulnerable to UVA radiation than normal skin cells because they are unable to repair themselves as efficiently.

2 Jul 2010

Kun Run Biotechnology obtains China SFDA manufacturing approval for Entecavir

Kun Run Biotechnology, Inc., a leading bio-pharmaceutical company in China focusing on manufacturing and sales of peptide-based and small molecule drugs, today announced that they have obtained the manufacturing approval for Entecavir from the China State Food and Drug Administration (SFDA).

17 Jun 2010

PET scanning provides great insight into immune response

A commonly used probe for Positron Emission Tomography scanning and a new probe developed by researchers at UCLA reveal different functions in diverse cells of the immune system, providing a non-invasive and much clearer picture of an immune response in action.

19 May 2010

NSF Faculty Early Career Development Award for Zhihao Zhuang

Zhihao Zhuang, assistant professor in the Department of Chemistry and Biochemistry at the University of Delaware, has won the National Science Foundation Faculty Early Career Development Award.

17 Apr 2010

Tumor suppressor, Retinoblastoma, represses DNA replication genes during cellular senescence

A frequently mutated gene in human cancers is the reitnoblastoma (RB) gene, which controls a potent tumor suppression pathway.

15 Apr 2010

Genetic instability in people with Fanconi anemia: New proteins in FA DNA repair pathway may help explain

Identification of two new proteins in the Fanconi anemia DNA repair pathway may help explain genetic instability in people with Fanconi anemia and how otherwise healthy people are susceptible to cancer from environmentally triggered DNA damage.

26 Mar 2010

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

DNA Replication News and Research

Further Reading

Scientists identify possible therapeutic strategy for reducing leukemia risk from chemotherapy

Researchers discover genetic alterations responsible for Kabuki syndrome

RPA70 associated with SUMO-specific protease facilitates DNA repair: Research

Research finding uncovers alternative treatments for people with hereditary colorectal cancer

DNA damage caused by UVA radiation leads to melanoma

Kun Run Biotechnology obtains China SFDA manufacturing approval for Entecavir

PET scanning provides great insight into immune response

NSF Faculty Early Career Development Award for Zhihao Zhuang

Tumor suppressor, Retinoblastoma, represses DNA replication genes during cellular senescence

Genetic instability in people with Fanconi anemia: New proteins in FA DNA repair pathway may help explain

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

E-Cigarettes and Ethanol: A forensic Perspective on Vaping

Understanding Consumer-Consented Data to Optimize Digital Health Programs

The Future is Wearable: Advancing Human Health Through Portable Spectroscopy

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