Navigation Links
New model taps tiny, common tropical fish for large-scale drug screening to combat Cushing disease
Date:5/10/2011

LOS ANGELES (May 9, 2011) A common, tiny tropical fish plays a key role in a new model for Cushing disease, giving researchers a powerful tool to conduct extensive searches for effective treatments for this serious hormonal disorder, testing up to 300 drugs weekly.

The model published online on May 2 by the Proceedings of the National Academy of Sciences -- was created in the laboratory of Shlomo Melmed, MD, dean of the medical faculty at Cedars-Sinai Medical Center, by his research team led by Ning-Ai Liu, MD, PhD.

They introduced into striped zebrafish the freshwater translucent tropical Danio rario -- the "pituitary tumor transforming gene" discovered in Melmed's lab in 1997. This caused the zebrafish to develop features of Cushing disease including: high levels of the stress-related hormone cortisol; diabetes; and heart disease. These zebrafish then were bred with fish that bear green fluorescent markers, allowing researchers to visualize in the resulting hybrids how drugs interact with the Cushing's disease pituitary tumors.

"This new model for Cushing disease means that we can more rapidly and effectively identify drugs that could be successful in fighting these tumors," Melmed said. "With no current drug therapies and limited options available to Cushing patients, it is our hope that our research will enable medical advances that will revolutionize how this disease is treated."

Cushing Disease often is caused by a pituitary tumor that triggers overproduction of a hormone, which, in turn, stimulates the adrenal gland to overproduce cortisol, affecting nearly every area of the body including the regulation of blood pressure and metabolism. This leads to serious health problems, including diabetes, hypertension, osteoporosis, obesity (especially with a distinctive moon face and fatty tissue deposits in the midsection, upper back and between the shoulders) and cardiovascular disease.

There are no approved drugs that effectively target the pituitary tumors that frequently cause the disease. "Because the tumors can be too small to be detected by MRI and a complete tumor resection by surgery can be difficult in some cases, this leaves few treatment options for many with the disease," said Dr. Liu, an endocrinologist at Cedars Sinai.

In the initial test of the zebrafish model, researchers studied five drugs, including R-roscovitine, a drug in phase two trials to treat esophageal and non-small cell lung cancer. This drug was found to effectively suppress levels of hormone secreted by the pituitary tumor, as well as the level of cortisol and could be a potential treatment for fighting tumor growth.


'/>"/>

Contact: Nicole White
nicole.white@cshs.org
310-423-5215
Cedars-Sinai Medical Center
Source:Eurekalert

Related medicine news :

1. Model developed to improve combination vaccine accessibility worldwide
2. INFORMS health care conference highlights increased role of math modeling in health systems
3. Virtual lung models set to personalize asthma and COPD treatment
4. New scientific model tracks form of ovarian cancer to origins in fallopian tube
5. Controversial TOFT theory of cancer versus SMT model: Authors do battle in BioEssays
6. Biochemist uses computer models to study protein involved with cancer, aging and chronic disease
7. Fox Chase researchers report that naproxen reduces tumors in a mouse model of colon cancer
8. Researchers publish molecular disease model for melanoma
9. Inclusion of falls history shown to enhance accuracy of fracture risk assessment models
10. Models Photos May Spur Mixed Messages About Body Image
11. US health care reforms should use model developed by Queens University professor
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:6/26/2016)... , ... June 26, 2016 , ... ... once they have been diagnosed with endometriosis. These women need a treatment plan ... require a comprehensive approach that can help for preservation of fertility and ultimately ...
(Date:6/25/2016)... ... 2016 , ... First Choice Emergency Room , the largest network of ... Medical Director of its new Mesquite-Samuell Farm facility. , “We are pleased to ... said Dr. James M. Muzzarelli, Executive Medical Director of First Choice Emergency Room. ...
(Date:6/24/2016)... Los Angeles, CA (PRWEB) , ... June 24, 2016 , ... ... plastic surgery procedures that most people are unfamiliar with. The article goes on to ... known procedures, but also many of these less common operations such as calf and ...
(Date:6/24/2016)... MIAMI, Fla. (PRWEB) , ... June 24, 2016 , ... ... Florida Trend magazine’s 2016 Legal Elite. The attorneys chosen by their peers for this ... of Florida. , Seven Greenberg Traurig Shareholders received special honors as members of this ...
(Date:6/24/2016)... ... June 24, 2016 , ... ... the Clinical Decision Making in Emergency Medicine conference in Ponte Vedra Beach, FL. ... articles published in Emergency Medicine Practice and Pediatric Emergency Medicine Practice. ...
Breaking Medicine News(10 mins):
(Date:6/23/2016)... , June 23, 2016 Research and ... Global Market - Forecast to 2022" report to their ... treatment method for the patients with kidney failure, it replaces ... fluid from the patient,s blood and thus the treatment helps ... and chloride in balance. Increasing number of ...
(Date:6/23/2016)... , June 23, 2016 Roche (SIX: ... 510(k) clearance for its Elecsys BRAHMS PCT (procalcitonin) assay ... sepsis or septic shock. With this clearance, Roche is ... a fully integrated solution for sepsis risk assessment and ... with bacterial infection and PCT levels in blood can ...
(Date:6/23/2016)... -- Bracket , a leading clinical trial technology and ... platform, Bracket eCOA (SM) 6.0, at the 52 nd ... 2016 in Philadelphia , Pennsylvania.  A demonstration ... of its kind to fully integrate with RTSM, will be ... is a flexible platform for electronic clinical outcomes assessments that ...
Breaking Medicine Technology: