HOME >> BIOLOGY >> NEWS
OHSU team discovers compound that lacks estrogen's risks

and Rnnekleiv.

STX appears to act by stimulating a novel estrogen receptor, located in the cell membrane, that activates proteins involved in rapid cell signaling. In this way, it avoids the uterus and breasts, whose growth is stimulated by estrogen through a different pathway, leading to increased cancer risk.

The hypothalamus "controls all autonomic functions and maintains homeostasis eating, drinking, sex behavior, maternal and even paternal behavior," Kelly said. In particular, hypothalamic POMC neurons, which are especially sensitive to STX, "are what activate the natural reward pathways. This is the brain's endogenous opiate system."

Having a selective estrogen trigger for rapid signaling is critical for estrogen replacement therapy, Kelly said. STX is structurally distinct from tamoxifen and raloxifene, and it's about 10 times more potent than estrogen and has the potential to be more effective at maintaining cognitive performance of postmenopausal women.

"Women that don't have hormone replacement therapy have been known to have more cognitive impairment in terms of loss of memory, and a higher incidence of Alzheimer's disease," Kelly said. "At least at the basic level, existing SERMs do not seem to help. So the search was on for other compounds one can use to replace tamoxifen. The collaboration with Dr. Scanlan at UCSF made it possible to synthesize and test a series of related compounds before we came up with STX."

Despite the discovery of STX, Rnnekleiv stopped short of rejecting estrogen as an effective therapy, saying its many benefits far outweigh the risks that studies have yet to unequivocally demonstrate.

"Estrogen definitely has neuroprotective effects in the brain," Rnnekleiv said. "At least in animal models, it's been shown that estrogen can reduce neuronal cell death from stroke. One of the other important actions of estrogen is to prevent osteoporosis."

Kelly's and Rnnekle
'"/>

Contact: Jonathan Modie
modiej@ohsu.edu
503-494-8231
Oregon Health & Science University
30-Dec-2003


Page: 1 2 3

Related biology news :

1. LSU researcher discovers new bird
2. MIT team discovers memory mechanism
3. SMCM professor discovers cattle hormones that leak into streams and alter fish reproduction
4. UBC researcher discovers control room that regulates immune responses
5. UC Santa Barbara discovers cell survival gene may lead to treatments for degenerative diseases
6. Brain patterns the same whether doing or just watching, Queens researcher discovers
7. Study discovers key to baby-like skin
8. Rutgers researcher discovers melanoma causing gene
9. UI study discovers cells segregate molecules to control signaling
10. Polluted beach closures influenced by full moons and sunlight, surfer-engineer discovers
11. University of Pittsburgh Cancer Institute discovers proteins linked to colon cancer

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:2/11/2016)... , Feb. 11, 2016  Vigilant Solutions announces today that ... are being used by Lee,s Summit ... recent location and arrest of a homicide suspect. ... covers around 65 square miles and is home to ... Department has a single mobile license plate reader system and ...
(Date:2/9/2016)... AWRE ), a leading supplier of biometrics software and services, ... December 31, 2015.  --> --> ... an increase of 61% compared to $4.3 million in the same ... was $2.6 million compared to $0.2 million in the fourth quarter ... Higher revenue and operating income in the fourth quarter of this ...
(Date:2/8/2016)... , February 8, 2016 ... platform which presents innovation for clients, comfort and ... called VoiceKey. --> Worldcore is ... innovation for clients, comfort and unbeatable security, with ... --> Worldcore is the first ...
Breaking Biology News(10 mins):
(Date:2/10/2016)... , Feb. 10, 2016  The Maryland House ... , has announced that University of Maryland School of ... MBA and University of Maryland Medical System President and ... the "Speaker,s Medallion," the highest honor given to the ... Delegates. Dean Reece and Mr. Chrencik ...
(Date:2/10/2016)... Feb.10, 2016 ASAE is introducing a hybrid ... Companies (AMC) the option of joining or renewing through ... determined by staff size, every employee in any size ... and reap all available member benefits.   ... organizational membership options will allow organizations of any size ...
(Date:2/10/2016)... RICHLAND, Wash., Feb. 10, 2016  IsoRay, Inc. (NYSE ... seed brachytherapy and medical radioisotope applications for the treatment ... cancers, today announced its financial results for the second ... December 31, 2015. --> ... second quarter of fiscal 2016, which ended December 31, ...
(Date:2/10/2016)... Feb. 10, 2016  Matchbook, Inc., a company ... growing biotech companies, announced today the appointment of ... Advisor. Jim brings nearly 25 years of experience ... having spent nearly two decades in executive level ... Procurement at Genzyme and, most recently headed global ...
Breaking Biology Technology:
Cached News: