Navigation Links
Chemotherapy causes delayed severe neural damage
Date:4/21/2008

Cancer treatment with chemotherapeutic agents is often associated with delayed adverse neurological consequences - an occurrence often referred to as chemobrain - that may compromise the quality of life of a proportion of cancer survivors. Now, research published in the open access Journal of Biology demonstrates that treatment with a single chemotherapeutic agent, 5-fluorouracil (5-FU), by itself is sufficient to cause a syndrome of delayed degeneration in the central nervous system (CNS). 5-FU is a widely used chemotherapeutic agent that is employed, alone or in combination with other agents, in the treatment of cancers of the colon, rectum, breast, stomach, pancreas, ovaries and bladder.

Little is known about the side-effects of chemotherapy on the CNS, despite their obvious clinical importance. Until now researchers have not fully understood the underlying biology, including whether these effects require: exposure to multiple chemotherapeutic agents; chemotherapeutic agents plus the bodys own response to cancer; blood-brain barrier damage; or inflammation. Clinicians have also lacked animal models to study this important problem.

Professor Mark Noble and colleagues of the University of Rochester Stem Cell and Regenerative Medicine Institute and the Harvard Medical School, Boston discovered that short-term systemic administration of 5-FU to mice caused both acute CNS damage and a syndrome of progressively worsening delayed damage. This damage was not self-repairing, and instead became worse over time. In addition, Noble and colleagues also demonstrated that treatment with chemotherapy also had delayed effects on the speed with which information is transferred from the ear to the brain.

Myelin sheaths are necessary for normal neuronal function. One key finding of the study was that clinically relevant concentrations of 5-FU were toxic not only for dividing cells of the CNS but also for the cells that produce the insulating myelin sheaths (non-dividing oligodendrocytes). The delayed damage the researchers measured was to the myelinated tracts of the CNS and associated with extensive myelin pathology. The findings regarding the speed of ear-to-brain information transfer may offer a non-invasive means of analyzing myelin damage associated with cancer treatment.

Multiple clinical reports have identified neurotoxicity as a complication of treatment regimens in which chemotherapeutic agents such as 5-fluorouracil are components, says Noble. As treatments with chemotherapeutic agents will clearly remain the standard of care for cancer patients for many years to come, the need to better understand such damage is great.

Professor Noble continues These studies extend the field of stem cell medicine beyond the use of cell transplantation for tissue repair. It is our knowledge of stem cell biology that allows us to begin to understand some of the causes of this syndrome, as well as providing the means of preventing or repairing this damage.

This research provides the first demonstration that delayed CNS damage can be induced by a single chemotherapeutic agent and also generates the first animal model of such damage. These studies further demonstrate that this syndrome differs from that caused by irradiation and thus may represent a new class of delayed CNS degenerative damage.


'/>"/>

Contact: Charlotte Webber
charlotte.webber@biomedcentral.com
44-020-763-19980
BioMed Central
Source:Eurekalert

Related medicine news :

1. Chemotherapy may be culprit for fatigue in breast cancer survivors
2. Replidyne Pipeline Featured at 47th Annual Interscience Conference on Antimicrobial Agents and Chemotherapy
3. To evade chemotherapy, some cancer cells mimic stem cells
4. New chemotherapy regimen prolongs survival in difficult-to-treat childhood brainstem gliomas
5. PET scans can accurately detect a breast tumors response to chemotherapy
6. Chemotherapy with gemcitabine delays progression of operable pancreatic cancer
7. Medicare modernization act did not change chemotherapy as feared
8. HER-2 status predicts success of chemotherapy in breast cancer treatment, study finds
9. Cancer conflict with chemotherapy treatment
10. Intra-arterial combination chemotherapy induces long-term survival for hepatocellular carcinoma
11. Jefferson researchers show chemotherapy and radiation together extend lung cancer patients lives
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:6/23/2017)... , ... June 23, 2017 , ... ... Act (BCRA), their proposed healthcare bill to repeal and replace the Affordable Care ... Senate bill would make significant cuts to Medicaid, a public health insurance program ...
(Date:6/23/2017)... ... June 23, 2017 , ... Everybody has their own ... others prefer to read it, and some people don't like it at all. FindaTopDoc ... what they found: , Erotic literature can give readers a taste of their deepest, ...
(Date:6/23/2017)... ... June 23, 2017 , ... 21 Middle East and South Asia Leaders ... leaders from government, business and civil society in 11 countries across the Middle East ... engaging in a transformative exchange of knowledge and ideas with the leading minds in ...
(Date:6/23/2017)... (PRWEB) , ... June 23, 2017 , ... Ulster University, ... June, 2017 from 9 am to 3 pm to present to graduate students exciting ... is an original curriculum project led by The Health Improvement Service of the ...
(Date:6/23/2017)... ... June 23, 2017 , ... Moore Insurance, an eastern ... access to asset protection and financial planning services, is teaming up with the ... lives of children with cancer and other chronic diseases. , The For A ...
Breaking Medicine News(10 mins):
(Date:6/16/2017)... WAYNE, N.J. , June 16, 2017 Datascope Corp. ... sold by Datascope Corp. for a potential electrical test failure code.     ... PRODUCT PART NUMBER ... CS100 IABP CS300 IABP ... ...
(Date:6/13/2017)... June 13, 2017 Zimmer Biomet Holdings, Inc. (NYSE ... announced that the U.S. Food and Drug Administration (FDA) has ... 2015 relating to its Zhejiang, China ... "The successful clearance of the Warning Letter related ... facility is a measure of the progress we have made ...
(Date:6/9/2017)... , June 9, 2017 More than 400 ... effort to help spread lessons learned from clinical research ... Diabetes Federation (IDF) and Eli Lilly and Company (NYSE: ... second phase of the Bringing Research in Diabetes to ... commitment to helping people with diabetes effectively manage their ...
Breaking Medicine Technology: