Navigation Links
Mechanism found connecting metastatic breast cancer and arthritis
Date:4/1/2012

New research shows it may be no accident when doctors observe how patients suffering from both breast cancer and arthritis seem to have more aggressive cancer. However, the new-found interaction between the two diseases may also suggest a possible treatment.

A potential relationship between metastatic breast cancer and autoimmune arthritis, as suggested by past epidemiological studies, has led researchers from the University of North Carolina at Charlotte to perform a series of mouse model experiments that appear to confirm the connection.

"Epidemiological studies have implied that breast cancer survival is significantly lower in patients who also had autoimmune arthritis," noted Pinku Mukherjee, Irwin Belk Distinguished Scholar of Cancer Research at UNC Charlotte, whose lab conducted the experiments. "As there is no obvious reason this should be so, we were interested in exploring possible cancer mechanisms that might explain why."

The experiments point to an intimate relationship between mast cells immune system cells that are located in various tissues and that can cause inflammation and metastatic tumors.

In previously published studies, UNC Charlotte cancer researcher Lopamudra Das Roy and her mentor Mukherjee established that breast cancer associated metastases were significantly higher in arthritic mice, with a threefold increase in lung metastases and a twofold increase in bone metastases.

In their most recent work, the researchers found that mast cells and their associated inflammation are present in larger numbers in the bones and lungs of arthritic mice than they are in non-arthritic mice. Their findings point to a relationship between the cKit receptor found on mast cells and the transmembrane stem cell factor (SCF) ligand found on metastatic breast cancer cells. The interaction between SCF and cKit appears to play a critical role in facilitating metastasis.

"We confirmed the relationship we suspected between autoimmune disease and metastastic breast cancer cells," Mukherjee said. "This is an exciting result for us because it confirms an interesting interdependence between cancer metastasis and a specific component of the immune system."

The study results will be presented by Lopamudra Das Roy, Research Assistant Professor at UNC Charlotte, and Mukherjee at the 2012 American Association for Cancer Research Annual Meeting in Chicago at a press conference on April 1.

The researchers worked with two strains of mice. The first group had spontaneous arthritis (SKG mice) and the second group of mice had spontaneous breast cancer (MMTV-PyV MT mice). Each of the mouse strains were artificially induced to develop the other disease and then tested for differences.

Among the findings of the analysis was that the population of mast cells within bone and lung microenvironment was significantly higher in those mice with arthritis and breast cancer vs. those without arthritis and breast cancer. The differentiation of mast cells from bone marrow derived stem cells was also significantly higher in the arthritic versus the non-arthritic tumor-bearing mice.

Mast cells are the only "terminally differentiated" (mature) cells in the body that develop, like blood cells, from stem cells in the bone marrow and that also have a c-Kit receptor. Suspecting a relationship between the c-Kit receptor on the mast cells and the SCF ligand expressed by the metastatic cancer cells, the researchers tested the effect of blocking receptor by treating the mice with an anti-c-Kit receptor antibody and celecoxib, an anti-inflammatory medication.

"When the mice were treated with a therapy to target the c-Kit mast cell receptor in combination with celecoxib -- a drug used to treat autoimmune arthritis -- the incidence of breast cancer metastasis to the bone and lung was greatly reduced," Das Roy noted.

The researchers conclude that in an arthritic condition, SCF expression in metastatic breast cancer cells induces the differentiation of mast cells from bone marrow through SCF/CKit signaling. Mast cells, in turn, facilitate the efficient metastasis of the breast cancer cells in bone and lung tissue. Autoimmune arthritis disease increases the intensity of metastatic breast cancer because bone marrow stem cells in autoimmune arthritis victims have greater potential to develop into mast cells.

In future studies, the researchers plan to examine the presence of mast cells in human tumor samples.


'/>"/>
Contact: James Hathaway
jbhathaw@uncc.ed
704-687-5743
University of North Carolina at Charlotte
Source:Eurekalert

Related biology news :

1. Researchers unravel genetic mechanism of fatty liver disease in obese children
2. Unexpected discovery reveals a new mechanism for how the cerebellum extracts signal from noise
3. New insight into mechanisms behind autoimmune diseases suggests a potential therapy
4. Mechanism for Burgess Shale-type preservation
5. Another mechanism discovered by which sulforaphane prevents cancer
6. MDC researchers reveal molecular mechanism underlying severe anomalies of the forebrain
7. Immunological mechanisms of oncolytic adenoviral therapy
8. How protein networks stabilize muscle fibers: Same mechanism as for DNA
9. Sweeping genetic analysis of rare disease yields common mechanism of hypertension
10. Scientists uncover novel mechanism of glioblastoma development
11. Research team discovers genes and disease mechanisms behind a common form of muscular dystrophy
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/19/2016)... , UAE, April 20, 2016 ... be implemented as a compact web-based "all-in-one" system solution ... the biometric fingerprint reader or the door interface with ... of modern access control systems. The minimal dimensions of ... ID readers into the building installations offer considerable freedom ...
(Date:4/15/2016)... , April 15, 2016 ... the,  "Global Gait Biometrics Market 2016-2020,"  report to ... http://photos.prnewswire.com/prnh/20160330/349511LOGO ) , ,The global gait biometrics ... of 13.98% during the period 2016-2020. ... angles, which can be used to compute factors ...
(Date:4/13/2016)... 2016  IMPOWER physicians supporting Medicaid patients in ... clinical standard in telehealth thanks to a new partnership ... platform, IMPOWER patients can routinely track key health measurements, ... index, and, when they opt in, share them with ... a local retail location at no cost. By leveraging ...
Breaking Biology News(10 mins):
(Date:6/23/2016)... June 23, 2016 Houston Methodist Willowbrook ... Cy-Fair Sports Association to serve as their official ... Houston Methodist Willowbrook will provide sponsorship support, athletic ... with association coaches, volunteers, athletes and families. ... Cy-Fair Sports Association and to bring Houston Methodist ...
(Date:6/23/2016)... 23, 2016   EpiBiome , a precision microbiome ... in debt financing from Silicon Valley Bank (SVB). The ... to advance its drug development efforts, as well as ... "SVB has been an incredible strategic partner to ... traditional bank would provide," said Dr. Aeron Tynes ...
(Date:6/23/2016)... LOUISVILLE, Ky. , June 23, 2016 /PRNewswire/ ... from two Phase 1 clinical trials of its ... double-blind, placebo-controlled, single and multiple ascending dose studies ... and pharmacodynamics (PD) of subcutaneous injection in healthy ... APL-2 subcutaneously (SC) either as a single dose ...
(Date:6/23/2016)... CA (PRWEB) , ... June 23, 2016 , ... ... software, is exhibiting at the Pennsylvania Convention Center and will showcase its product’s ... conference. ClinCapture will also be presenting a scientific poster on Disrupting Clinical Trials ...
Breaking Biology Technology: