Navigation Links
'Humanized' mice developed at OHSU enable malaria research breakthrough at Seattle BioMed
Date:9/10/2012

PORTLAND, Ore. A novel human liver-chimeric mouse model developed at Oregon Health & Science University and Yecuris Corporation has made possible a research breakthrough at Seattle Biomedical Research Institute that will greatly accelerate studies of the most lethal forms of human malaria.

The study findings are published online in the Journal of Clinical Investigation. Study photos were selected to appear in "Scientific Show Stoppers" on the JCI blog.

Plasmodium falciparum, one of two human-specific malaria parasites, is a global health crisis, causing more than 216 million new infections annually and resulting in an estimated 655,000 deaths, according to the World Health Organization.

Sporozoites, the infectious form of the parasite, are spread to people through the bites of infected mosquitos and multiply in the human liver during the initial stages of infection. There, they undergo liver stage development, culminating in the formation and release of tens of thousands of merozoites, the parasitic phase of development that infects red blood cells.

Until now, there have been few data on human malaria liver stage biology due to the lack of a viable small animal model and because liver stage P. falciparum does not grow well in a dish. Consequently, most research and therapeutics to date have targeted the human blood stage of P. falciparum's development because it replicates well in culture.

The liver-to-blood stage of P. falciparum is the focus of this research because the parasite is virtually harmless, causing no disease symptoms, prior to its transition to the blood stage.

In this study, researchers at Seattle Biomedical Research Institute, Yecuris Corporation, Oregon Health & Science University and The Rockefeller University have demonstrated that a complete liver-to-blood stage infection of P. falciparum is possible using a unique immunocompromised mouse model engrafted with human liver-chimeric cells.

The mouse model, termed the FRGTM KO mouse, was developed by paper co-author and internationally accomplished stem cell researcher Markus Grompe, M.D., in the Pap Family Pediatric Research Institute, a research arm of Oregon Health & Science University Doernbecher Children's Hospital.

In 2007 the technology was licensed to Yecuris Corporation, a biotechnology company that now produces the model and human hepatocytes on a commercial scale. As a result of this work, the FRGTM KO mouse now will be used to study new drug interventions, parasite attenuation and innate immune responses to P. falciparum liver stage infection.

The scientists also report that through the infection of the FRGTM KO mouse model, they were able to observe a previously unknown expression of proteins in liver stage development in humans that may be exploited for intervention. Equally important, they say, the FRGTM KO mouse could well provide unique opportunities for the study of another severe form of human malaria, Plasmodium vivax.

"These breakthroughs are remarkable and highlight OHSU and Yecuris' contributions to local biotechnology and research breakthroughs globally. The next generation mouse model we're developing will have a human immune system that will allow us to test not just drugs, but vaccines, which has never been done for parasitic diseases," said Grompe, Ray Hickey Chair and Director of the Pap Family Pediatric Research Institute, OHSU Doernbecher Children's Hospital; and professor of pediatrics, and molecular and medical genetics, OHSU School of Medicine.

Grompe founded Yecuris Corporation in 2007 and is a shareholder. John Bial, who joined Yecuris in 2009, is president and chief executive officer.

"The extensive collaborative relationships and risk-taking involved in planning and executing this research is a testament to the tireless dedication of these teams to solving one of the globe's oldest killers. It also highlights how private and public funding can come together effectively to address critical challenges in global health," said Bial.

"This first demonstration of the newly developed dual humanized FRGTM KO system is a good introduction to the kinds of translational medicine benefits that we can expect to see from these technologies. We anticipate that the next frontier for these systems will be as platforms for human vaccine development and validation, which may very likely first be tested in the area of malaria," Bial explained.


'/>"/>

Contact: Tamara Hargens-Bradley
hargenst@ohsu.edu
503-494-8231
Oregon Health & Science University
Source:Eurekalert  

Related biology news :

1. Mini-CT scanner developed as a teaching tool
2. Blossom end rot plummets in Purdue-developed transgenic tomato
3. The first chemical circuit developed
4. Grassroots approach to conservation developed
5. Composite nanofibers developed by Penn scientists next chapter in orthopaedic biomaterials
6. Electronic nose prototype developed
7. New long-term antimicrobial catheter developed
8. Keck award enables Carnegie Mellon and Stanford to dramatically expand crowdsourced RNA design
9. New genomic sequencing method enables smarter anaysis of individual cells
10. The end of an era? Branding horses does not enable them to be identified
11. Notre Dame researchers using novel method to combat malaria drug resistance
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
'Humanized' mice developed at OHSU enable malaria research breakthrough at Seattle BioMed
(Date:2/9/2016)... Feb. 9, 2016 Vigilant Solutions announces today that ... (LPR) to develop a lead in a difficult homicide case. ... data to locate the suspect vehicle. Due to the ongoing ... have been omitted at the agency,s request. ... explains, "Our victim was found deceased at an intersection here ...
(Date:2/3/2016)... India , February 3, 2016 ... the new market research report "Automated Fingerprint Identification System ... Search, Latent Search), Application (Banking & Finance, Government, Healthcare, ... published by MarketsandMarkets, the market is expected to be ... CAGR of 21.0% between 2015 and 2020. The transformation ...
(Date:2/2/2016)... Feb. 2, 2016 Checkpoint Inhibitors for ... Market Are you interested in the future ... for checkpoint inhibitors. Visiongain,s report gives those predictions ... and national level. Avoid falling behind in ... opportunities and revenues those emerging cancer therapies can ...
Breaking Biology News(10 mins):
(Date:2/11/2016)... 11, 2016  Neurocrine Biosciences, Inc. (NASDAQ: NBIX ) today ... 31, 2015. --> --> ... loss of $29.3 million, or $0.34 loss per share, compared to ... for the same period in 2014. For the year ended December ... or $1.05 loss per share, as compared to a net loss ...
(Date:2/11/2016)... -- Wellcentive today announced it has been selected by FamilyCare ... community care organization (CCO) with more than 130,000 ... and care management solutions and services. Wellcentive,s capabilities ... managers, analysts and care managers while providing insight ... members. Oregon . ...
(Date:2/11/2016)... Buffalo, New York (PRWEB) , ... February 11, ... ... and analytical instruments for more than 150 years, continues today to pursue the ... to its line of analytical instruments: the AR9 Refractometer and the AR5 Refractometer. ...
(Date:2/10/2016)... , Feb. 10, 2016  The Maryland House of ... has announced that University of Maryland School of Medicine ... and University of Maryland Medical System President and CEO ... "Speaker,s Medallion," the highest honor given to the public ... Dean Reece and Mr. Chrencik for ...
Breaking Biology Technology: