Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Malignant cancer cells generate mice through cloning

03.08.2004


Nature can reset the clock in certain types of cancer and reverse many of the elements responsible for causing malignancy, reports a research team led by Whitehead Institute Member Rudolf Jaenisch, in collaboration with Lynda Chin from Dana Farber Cancer Institute. The team demonstrated this by successfully cloning mice from an advanced melanoma cell.



"This settles a principal biological question," says Jaenisch, who also is a professor of biology at MIT. "The epigenetic elements of cancer are reversible; the genetic elements, as expected, are not."

Researchers have known for decades that cancer begins when certain key genes in an otherwise healthy cell mutate, and tumor growth depends on continuing, multiple mutations. But only recently have scientists begun to understand the "epigenetic" components of cancer-that is, how other molecules in a cell affect genes without actually altering the sequence of DNA. Many of these epigenetic components, such as methylation, can determine if a gene is silent or active.


Konrad Hochedlinger and Robert Blelloch, postdoctoral researchers in the Jaenisch lab, studied whether any of these epigenetic influences can be reversed. First, they removed the nucleus from a melanoma cell and injected it into a de-nucleated egg cell (a process known as nuclear transfer). After the egg cell developed into a blastocyst, Hochedlinger and Blelloch harvested embryonic stem cells which they then incorporated into a group of healthy mouse blastocysts. Many of these blastocysts developed into normal adult mice. The work was reported in the August issue of the journal Genes and Development.

"It’s important to note," says Blelloch, "that the stem cells from the cloned melanoma were incorporated into most, if not all, tissues of adult mice, showing that they can develop into normal, healthy cells," such as those for skin pigmentation, immunity, and connective tissue. But in spite of this, when certain cancer-related genes in these mice were activated, they developed malignant tumors at a much faster rate than the control mice.

According to Lynda Chin of Dana-Farber’s oncology department, this research opens up the door to developing cancer animal models in which researchers could ask epigenetic questions. "Although studies are ongoing, these findings have provided initial clues of the relative contributions of the epigenetic versus genetic lesions in the development of cancer," she says. "Drugs that target the cancer epigenome may prove to be a key therapeutic opportunity for diverse cancers."

David Cameron | EurekAlert!
Further information:
http://www.wi.mit.edu

More articles from Life Sciences:

nachricht Symbiotic bacteria: from hitchhiker to beetle bodyguard
28.04.2017 | Johannes Gutenberg-Universität Mainz

nachricht Nose2Brain – Better Therapy for Multiple Sclerosis
28.04.2017 | Fraunhofer-Institut für Grenzflächen- und Bioverfahrenstechnik IGB

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Making lightweight construction suitable for series production

More and more automobile companies are focusing on body parts made of carbon fiber reinforced plastics (CFRP). However, manufacturing and repair costs must be further reduced in order to make CFRP more economical in use. Together with the Volkswagen AG and five other partners in the project HolQueSt 3D, the Laser Zentrum Hannover e.V. (LZH) has developed laser processes for the automatic trimming, drilling and repair of three-dimensional components.

Automated manufacturing processes are the basis for ultimately establishing the series production of CFRP components. In the project HolQueSt 3D, the LZH has...

Im Focus: Wonder material? Novel nanotube structure strengthens thin films for flexible electronics

Reflecting the structure of composites found in nature and the ancient world, researchers at the University of Illinois at Urbana-Champaign have synthesized thin carbon nanotube (CNT) textiles that exhibit both high electrical conductivity and a level of toughness that is about fifty times higher than copper films, currently used in electronics.

"The structural robustness of thin metal films has significant importance for the reliable operation of smart skin and flexible electronics including...

Im Focus: Deep inside Galaxy M87

The nearby, giant radio galaxy M87 hosts a supermassive black hole (BH) and is well-known for its bright jet dominating the spectrum over ten orders of magnitude in frequency. Due to its proximity, jet prominence, and the large black hole mass, M87 is the best laboratory for investigating the formation, acceleration, and collimation of relativistic jets. A research team led by Silke Britzen from the Max Planck Institute for Radio Astronomy in Bonn, Germany, has found strong indication for turbulent processes connecting the accretion disk and the jet of that galaxy providing insights into the longstanding problem of the origin of astrophysical jets.

Supermassive black holes form some of the most enigmatic phenomena in astrophysics. Their enormous energy output is supposed to be generated by the...

Im Focus: A Quantum Low Pass for Photons

Physicists in Garching observe novel quantum effect that limits the number of emitted photons.

The probability to find a certain number of photons inside a laser pulse usually corresponds to a classical distribution of independent events, the so-called...

Im Focus: Microprocessors based on a layer of just three atoms

Microprocessors based on atomically thin materials hold the promise of the evolution of traditional processors as well as new applications in the field of flexible electronics. Now, a TU Wien research team led by Thomas Müller has made a breakthrough in this field as part of an ongoing research project.

Two-dimensional materials, or 2D materials for short, are extremely versatile, although – or often more precisely because – they are made up of just one or a...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Fighting drug resistant tuberculosis – InfectoGnostics meets MYCO-NET² partners in Peru

28.04.2017 | Event News

Expert meeting “Health Business Connect” will connect international medical technology companies

20.04.2017 | Event News

Wenn der Computer das Gehirn austrickst

18.04.2017 | Event News

 
Latest News

Wireless power can drive tiny electronic devices in the GI tract

28.04.2017 | Medical Engineering

Ice cave in Transylvania yields window into region's past

28.04.2017 | Earth Sciences

Nose2Brain – Better Therapy for Multiple Sclerosis

28.04.2017 | Life Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>