Navigation Links
Silenced genes as a warning sign of blood cancer

In many types of cancer, parts of the genetic material of tumor cells are switched off by chemical labels called methyl groups. This kind of methyl labeling ranges among the epigenetic changes that do not change the sequence of DNA building blocks. Such labels are found particularly often in genes which act as important inhibitors of pathogenic cell growth.

Cancer researchers do not know why healthy cells and cancer cells differ in their methylation patterns and why it is particularly the cancer inhibitors that are frequently switched off. The study of these questions is a very promising area of research, because there are drugs available that can prevent the attachment of methyl groups or other epigenetic changes and, thus, at least delay the onset of cancer.

Professor Dr. Christoph Plass at the German Cancer Research Center (Deutsches Krebsforschungszentrum, DKFZ) has investigated, jointly with colleagues from the Ohio State University in Columbus, U.S.A., the processes leading to the different methyl labels in cancer cells. A key question is when the first labels occur in the development of cancer. In their recently published study the investigators used mice affected by chronic lymphocytic leukemia as a model for studying the disease.

The researchers investigated the genetic material of these mice at regular intervals from birth. They discovered first cancer-typical methylation patterns in mice that were only three months old. This means that deviations in methylation occur long before the first signs of disease appear. These were not observed before the animals were thirteen months old. Moreover, the researchers were able to show that methylation patterns in murine DNA are largely corresponding to those found in humans suffering from leukemia. This confirms that the mouse model is suitable for studying the disease.

"Since first deviations in methylation occur so early in mice, we should find out whether this is also true for humans. If so, an early methylation test in high-risk individuals could provide clues about a developing cancer," Christoph Plass says. In this case, preventive medical intervention might be possible. Drugs preventing methyl group attachment might delay the onset of cancer. First clinical studies have already been started to check this. "This is probably most effective in a very early phase of methylation," Plass explains. The researchers believe that the first chemically deactivated genes trigger whole cascades of changes in the genetic material which can hardly be controlled at a later stage.

Keyword: Epigenetics

The cells of the roughly 200 different tissues of the human body can fulfill their special tasks only by regulating the activity of their respective genes very specifically. Although every single gene is equipped with its own control elements, this is not enough for complex coordination. There is a second code that serves as an additional control level. In addition to the genetic switches that are directly integrated in the genetic material, the DNA, genes can also be switched on or off by chemical labeling of the DNA or the DNA packaging proteins. The most common of such epigenetic mutations is the attachment of methyl groups. The effect of these small chemical compounds is that a gene can no longer be read and translated into proteins.

Unlike genetic mutations, which permanently change the sequence of the DNA building blocks, all epigenetic mutations are reversible and, therefore, potential target structures of appropriate drugs.


Contact: Dr. Sibylle Kohlstaedt
Helmholtz Association of German Research Centres

Related medicine news :

1. Pathway links inflammation, angiogenesis and breast cancer
2. Traffic Fumes Plus Genes Boosts Kids Asthma Risk
3. New Database to Help Speed Search for Bipolar Disorder Genes
4. Is Perfect Pitch All in the Genes?
5. Discovery suggests location of genes for breast density, a strong risk factor for breast cancer
6. Genes Boost Risk for Rheumatoid Arthritis, Lupus
7. The genes involved in rheumatoid arthritis identified
8. If you think cancer genes are simple, you dont know JAK
9. Test for lung cancer looks for discomforting quiet among protective genes
10. Hushed Genes Might Mean Higher Lung Cancer Risk
11. EURYI project to understand how the brain wires during embryogenesis
Post Your Comments:
(Date:11/30/2015)... , ... November 30, 2015 , ... ... at a University of Delaware Accounting and Management of Information Systems course. Based ... for mid-market businesses. Sommer will speak at before student in the Enterprise Resource ...
(Date:11/30/2015)... , ... November 30, 2015 , ... ... continuing education course in Dallas, TX, on January 29 and 30, 2016. The ... improve the functions of their practices, to learn how to better succeed in ...
(Date:11/30/2015)... PA (PRWEB) , ... November 30, 2015 , ... A ... 15th annual Regional Biotech Conference, organized by the Baruch S. Blumberg Institute. , The ... 100 of the area’s life science and biotechnology leaders for the conference, which focused ...
(Date:11/30/2015)... ... November 30, 2015 , ... HemoTreat™ has announced ... its hemorrhoid ointment to its website. , “Our goal is simple:” says Michael ... hemorrhoids. Adding the comparison chart and ingredient list allows our customers to quickly ...
(Date:11/30/2015)... ... November 30, 2015 , ... ChiliPad , Chili ... maximize recovery through quality sleep. Tim DiFrancesco, training coach for the LA Lakers, ... sleep. ChiliPad precisely regulates the surface temperature of each side of the bed ...
Breaking Medicine News(10 mins):
(Date:11/30/2015)... Nov. 30, 2015  PTS Diagnostics, the U.S.-based manufacturer ... analyzers, A1CNow ® systems, and PTS Detect™ ... of patents that will propel the company into the ... Europe . The technology is a ... those on smartphones and tablets, and uses test strip ...
(Date:11/30/2015)... , Nov. 30, 2015 Cumberland Pharmaceuticals (CPIX), ... present live at on December 3, 2015. ... TIME: 3:15p.m. ET LINK: ... LINK: --> ... event where investors are invited to ask the company questions ...
(Date:11/30/2015)... LAKE CITY , Nov. 30, 2015 Booth ... (NYSE: VAR ) will exhibit a broader array of ... of the Radiological Society of North America ... Varian exhibit at the meeting will feature X-ray components "At ... CT tube, a line of products from Varian,s Claymount brand, ...
Breaking Medicine Technology: