Navigation Links
University of Maryland researchers discover possible drug targets for common non-Hodgkin's lymphoma
Date:7/19/2011

Baltimore, MD July 19, 2011. Researchers at the University of Maryland School of Medicine have discovered a novel interaction between two proteins involved in regulating cell growth that could provide possible new drug targets for treating diffuse large B-cell lymphoma, the most common type of non-Hodgkin's lymphoma.

In a study published online in Nature Communications, the scientists report that they have found a complex molecular and functional relationship between ERK (extracellular signal-regulated kinase), a protein that helps to regulate cell proliferation and survival, and CHK2 (checkpoint kinase 2), a protein that is involved in the cellular DNA damage response. They also demonstrated, for the first time, elevated levels of both proteins in diffuse large B-cell lymphoma cells, compared to non-cancerous cells.

Ronald B. Gartenhaus, M.D., associate professor of medicine at the University of Maryland School of Medicine and the senior author, says researchers found that CHK2 appears to regulate the activity of ERK, although the exact mechanism is not clear. "The two proteins physically interact, which was not known before, and we may be able to use this interaction for therapeutic advantage. We found that treating human B-cell lymphoma cells with both an ERK inhibitor inhibitor and a CHK2 inhibitor killed substantially more cancer cells than treating the cells with either drug alone," he says.

"Based on our findings, we believe that a combination therapy targeting both ERK and CHK2 could offer a potential new approach to treating diffuse large B-cell lymphoma," says Dr. Gartenhaus, who is co-leader of the Program in Molecular and Structural Biology at the University of Maryland Marlene and Stewart Greenebaum Cancer Center.

The drugs used to inhibit ERK and CHK2 caused the cancer cells to die through a process called apoptosis, or programmed cell death. Human cells normally self-destruct in a controlled manner, but cancer cells lose this ability and consequently grow uncontrollably.

E. Albert Reece, M.D., Ph.D., M.B.A., vice president of medical affairs at the University of Maryland and dean of the University of Maryland School of Medicine, says, "This is a very important discovery that may ultimately benefit patients with diffuse large B-cell lymphoma, a common hematological malignancy that can be difficult to treat. These findings provide valuable new insight into the molecular make-up of this cancer that may lead to new targeted drug therapies."

Lymphoma is a cancer that originates in the lymphocytes (a type of white blood cell) of the immune system. Diffuse large B-cell lymphoma is a fast-growing, aggressive form of non-Hodgkin's lymphoma. It accounts for about 30 to 35 percent of all non-Hodgkin's lymphomas, and about 25,000 new cases are diagnosed each year. Non-Hodgkin's lymphomas usually are treated with several types of chemotherapy cyclophosphamide, doxorubicin, vincristine and prednisone (CHOP) and a biological therapy, such as the monoclonal antibody rituximab (Rituxan). Radiation therapy may be used on occasion, and bone marrow or stem cell transplantation may also be a treatment option.

Dr. Gartenhaus says researchers hope the study findings will help to develop new therapies that will be effective and well-tolerated by patients. "We believe it is important to identify drugs that can improve the efficacy and reduce the toxicity of standard anti-lymphoma therapy," he says.

The new research showed that using compounds to inhibit ERK and CHK2 did not cause any significant damage to normal cells or tissue examined in the lab, according to Bojie Dai, Ph.D., a postdoctoral fellow at the University of Maryland School of Medicine and the lead author. "We hope that new therapies directed at these two proteins would have modest side effects because they would target only the lymphoma cells," Dr. Dai says.

Dr. Gartenhaus says that researchers don't know yet whether the interaction between ERK and CHK2 occurs in other types of lymphoma.


'/>"/>

Contact: Karen E. Warmkessel
kwarmkessel@umm.edu
410-328-8919
University of Maryland Medical Center
Source:Eurekalert

Related medicine news :

1. Columbia University Medical Center receives $38.9 million to help translate science into treatment
2. Wayne State University engineering student receives American Tinnitus Association award
3. Mainz University Medical Center deploys new system for therapy of metastatic spinal tumors
4. Wayne State University researcher argues that sex reduces genetic variation
5. New book by Indiana University physicians slays health myths we all thought were true
6. Health providers should emphasize breast cancer screening, Wayne State University research finds
7. Researchers at Oregon Health & Science University discover MS-like disease in monkeys
8. Religion benefits traumatic brain injury victims, Wayne State University research finds
9. Internationally recognized BME professor to join University of Texas as visiting scholar
10. Three senior Hebrew University faculty members receive Kaye Awards for innovations
11. Wayne State University researchers win grant from the NSF to target tinnitus
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:12/2/2016)... ... December 02, 2016 , ... CloudLIMS.com, a class-leading ... LIMS, CloudLIMS Lite. CloudLIMS Lite helps biobanks, clinical, research and testing laboratories keep ... disposal. The new version is a faster and a more efficient product, allowing ...
(Date:12/2/2016)... ... December 02, 2016 , ... ... diagnostic imaging systems and the first company to offer robotic imaging to ... at their tradeshow booth # 941 for the American Association of Equine Practitioners ...
(Date:12/2/2016)... ... December 02, 2016 , ... Rijuven Corp launches rejiva ( http://www.rejiva.com ... and night. No other wearable health technology on the market can deliver all that ... poeple more meaningful insights about their health than the usual heart rate and steps ...
(Date:12/2/2016)... ... 2016 , ... "Pro3rd Accents Volume 2 is a set of 30 accented ... with just a few clicks of the mouse," said Christina Austin - CEO of ... Choose from various styles with accented animations, rigid boxes, simplistic lines, and more. In ...
(Date:12/2/2016)... Miami, FL (PRWEB) , ... December 02, 2016 ... ... over 5,100 hot meals to needy individuals and families from eight different sites ... Florida on Thanksgiving Day. Over 1,000 volunteers worked very hard on Thanksgiving morning ...
Breaking Medicine News(10 mins):
(Date:12/2/2016)... Research and Markets has announced the addition of the ... to 2022" report to their offering. ... , , The global ultrasound ... is expected to grow at a CAGR of 5.5% during 2016-2022. Based ... during the forecast period, a CAGR of 8.8% in the global market. ...
(Date:12/2/2016)... Quantum Radiology,s Mobile Breast Center (QR MBC) brings cutting-edge ... at the workplace, thereby maximizing convenience and compliance.  QR ... and SunTrust Bank, and community health groups to provide ... "I think it,s a great service for ... a mammogram without taking a large amount of time ...
(Date:12/2/2016)... 2, 2016 In the first ever attempt ... those derived from C. sativa, the Hebrew University in ... Napoli Federico II , the Universita` del Piemonte Orientale ... critical, integrated and unified inventory of phytocannabinoids of different ... on the remarkable chemical and structural diversity of phytocannabinoids. ...
Breaking Medicine Technology: