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This #FacultyFriday congratulates Monique van Hoek, a professor in the School of Systems Biology, for earning the Dean’s Big Challenge Award! van Hoek pioneers innovative solutions to combat antibiotic-resistant bacteria using antimicrobial peptides. Her latest discovery, GATR-3—derived from an alligator peptide—has shown remarkable effectiveness in killing some of the most resistant bacteria responsible for chronic wound infections. This breakthrough holds significant promise for patients with conditions like diabetes and soldiers with severe wounds, offering new treatment options for difficult-to-treat infections.

In collaboration with Barney Bishop from the Department of Chemistry and Biochemistry, van Hoek has advanced GATR-3 through pre-clinical testing with support from the Joint Warfighter Program. With more than 60 publications and five patents, she is a recognized leader in her field. van Hoek also mentors 15 to 20 graduate students annually in her lab at the Center for Infectious Disease Research.

Recently, she and her collaborators received a Virginia Catalyst grant to develop a hydrogel for delivering antibiotics to surgical and orthopedic infections, further expanding her impact in the fight against bacterial resistance.

Learn more about van Hoek and all our Dean’s award winners: https://lnkd.in/eDTn_i_t

• *The programs and services offered by George Mason University are open to all who seek them. George Mason does not discriminate on the basis of race, color, religion, ethnic national origin (including shared ancestry and/or ethnic characteristics), sex, disability, military status (including veteran status), sexual orientation, gender identity, gender expression, age, marital status, pregnancy status, genetic information, or any other characteristic protected by law. After an initial review of its policies and practices, the university affirms its commitment to meet all federal mandates as articulated in federal law, as well as recent executive orders and federal agency directives.

Dr. Hakami is the featured guest for the next Mason Science Series event hosted by the College of Science Dean Fernando Miralles-Wilhelm. Dr. Hakami will discuss his novel research into the regulation of immunity by extracellular vesicles (EVs) and also the development and characterization of a novel nanoparticle-based therapeutic platform called NESTED for treating infectious diseases. For more details, please go to the following link:

https://science.gmu.edu/UpcomingMSS

• *The programs and services offered by George Mason University are open to all who seek them. George Mason does not discriminate on the basis of race, color, religion, ethnic national origin (including shared ancestry and/or ethnic characteristics), sex, disability, military status (including veteran status), sexual orientation, gender identity, gender expression, age, marital status, pregnancy status, genetic information, or any other characteristic protected by law. After an initial review of its policies and practices, the university affirms its commitment to meet all federal mandates as articulated in federal law, as well as recent executive orders and federal agency directives.

This #FacultyFriday features Yuntao Wu, Professor,

He has been studying viruses for over 30 years, and for the past 20 years, he has been primarily focused on studying HIV infection. Read below to learn about his research, and visit:

https://science.gmu.edu/directory/yuntao-wu

• *The programs and services offered by George Mason University are open to all who seek them. George Mason does not discriminate on the basis of race, color, religion, ethnic national origin (including shared ancestry and/or ethnic characteristics), sex, disability, military status (including veteran status), sexual orientation, gender identity, gender expression, age, marital status, pregnancy status, genetic information, or any other characteristic protected by law. After an initial review of its policies and practices, the university affirms its commitment to meet all federal mandates as articulated in federal law, as well as recent executive orders and federal agency directives.

Research team receives $2.95M in NIH funding to study cell-derived extracellular vesicle mediated epigenetic HIV silencing in the brain.

Read the full Article Here

A collaboration including researchers from the Center for Infectious Disease Research at George Mason University is developing and characterizing a highly innovative modular approach that will utilize extracellular vesicles to deliver anti-HIV genes to virus-infected cells in the brain in an effort to epigenetically silence HIV expression in a long-term and stable manner.

Fatah Kashanchi, professor of Virology and Director of the Mason Science Laboratory of Molecular Virology, is the primary investigator on the National Institutes of Health funded collaboration which also includes Mason researchers, Yuriy Kim, Anastasia Marie Williams, and Heather Branscome; Lenny Schultz, a professor from The Jackson Laboratory; and Mason Science affiliate faculty, Kevin Morris, professor and director at The Griffith University Cell and Gene Therapy Group, Menzies Health Institute School of Pharmacology and Medical Sciences, in Queensland, Australia.

The methodology incorporates extracellular exosome delivery. Kashanchi said the effort could be likened to a package delivery. “The team is creating packages that are sent directly to a specific address within the central nervous system, perhaps to the brain ‘zip code’ or to the lymph nodes.” This package will change the actual structure of that viral  genome in the way it twists and turns so it can no longer be active. “For example, think of a normal double helix, then change the structure so that DNA is no longer usable, effectively silencing it with no side effects,” Kashanchi said. This silencing period would be in effect for the individual’s lifetime.

This method may also lead to a therapeutically relevant means to not only control HIV/HAND, (HAND is an HIV associated neurocognitive disorder that impacts memory and thinking), but could usher in a new highly innovative methodology that controls the epigenetic state of those genes involved in various other human diseases.

Kashanchi received $631,369 of the anticipated $2.95M from the National Institutes of Health for this research. Funding began in August 2023 and will end in late May 2028.

This and other breakthrough research efforts will be discussed in more detail during the upcoming annual meeting of the American Society of Intercellular Communication, (ASICbio.org), scheduled to occur from October 12 to 15, 2023.

Read the full Article Here

• *The programs and services offered by George Mason University are open to all who seek them. George Mason does not discriminate on the basis of race, color, religion, ethnic national origin (including shared ancestry and/or ethnic characteristics), sex, disability, military status (including veteran status), sexual orientation, gender identity, gender expression, age, marital status, pregnancy status, genetic information, or any other characteristic protected by law. After an initial review of its policies and practices, the university affirms its commitment to meet all federal mandates as articulated in federal law, as well as recent executive orders and federal agency directives.

Dr. Wu published a recent invited review article about HIV preintegration transcription and host antagonism.

The article gives the most comprehensive review of the subject in the past 20 years. https://pubmed.ncbi.nlm.nih.gov/37345240/

Dr. Yuntao Wu is a leading expert on HIV preintegration transcription. He discovered the synthesis of a functional Nef protein prior to HIV integration (Wu and Marsh, 2001, Science, 293:1503). 

This image below summarizes the main points covered in this review.

• *The programs and services offered by George Mason University are open to all who seek them. George Mason does not discriminate on the basis of race, color, religion, ethnic national origin (including shared ancestry and/or ethnic characteristics), sex, disability, military status (including veteran status), sexual orientation, gender identity, gender expression, age, marital status, pregnancy status, genetic information, or any other characteristic protected by law. After an initial review of its policies and practices, the university affirms its commitment to meet all federal mandates as articulated in federal law, as well as recent executive orders and federal agency directives.

Fahad Alsaab, a current PhD student in Biosciences (MID concentration) and Shravani Bobde (a graduate of the same program) worked together to design and test a set of new peptides called HRZN, as in “horizon”, designed to be effective against MDR A. baumannii. The most active peptide killed these wound-infecting bacteria with a MIC of 4 ug/ml.

Additional authors include Scott N. Dean, another former member of the van Hoek Lab and graduate of the PhD Biosciences program at GMU and Gabriel Ascoli, a summer ASSIP student who worked with Fahad.

The paper was published in the journal Antibiotics (IF 4.8). 

https://www.mdpi.com/2079-6382/12/9/1396 

• *The programs and services offered by George Mason University are open to all who seek them. George Mason does not discriminate on the basis of race, color, religion, ethnic national origin (including shared ancestry and/or ethnic characteristics), sex, disability, military status (including veteran status), sexual orientation, gender identity, gender expression, age, marital status, pregnancy status, genetic information, or any other characteristic protected by law. After an initial review of its policies and practices, the university affirms its commitment to meet all federal mandates as articulated in federal law, as well as recent executive orders and federal agency directives.

May 25th, 2023

The increase in bacteria capable of resisting some of the strongest medications available poses a serious threat to the health of all people. It is critical that researchers identify new ways to treat these infections and Biosciences PhD student, Alena James, is up to the task. She recently received a $5,000 Cosmos Scholar Grant to support research focused on different ways to treat one of these bacteria.

James’ research is an extension of a larger study funded by the Peer Reviewed Medical Research Program and led by Monique van Hoek, Professor of microbiology and infectious diseases in Mason’s School of Systems Biology. Van Hoek’s study focuses on Toxin-Antitoxin systems in bacteria and seeks to disrupt the ability of the “antitoxin” gene to regulate the “toxin” gene—ultimately killing the bacteria. If this approach proves successful, this would be a large step towards new treatments for bacteria that are otherwise resistant to available medications.

James will use the funding received through the Cosmos Grant to apply this approach to the biothreat bacterium Francisella. According to van Hoek,“the ability to specifically target expression of the toxin gene and cause bacterial cell death is a promising strategy in the fight against multidrug-resistant and dangerous bacteria.”

James earned a BA in Political Science and BS in Biology from Winthrop University, followed quickly with a Master’s in biology. James said she always held an interest in microbiology. As one of four children, she saw firsthand how financially difficult doctor and hospital visits could be on her parents. James said she wanted to be armed with enough medical knowledge to either treat herself and family directly, or allow her to make more informed decisions during health care visits.  

“My knowledge is power and the more I know about infectious diseases and about human anatomy I feel like I’m empowered to try and make small changes to protect myself and those I love against small microorganisms,” said James.

James started her career as an adjunct professor, teaching microbiology at York Technical College, and then continued her education with an MS in Biodefense from Mason’s Schar School of Policy and Government. Her MS led to several internships and contract supporting assignments with the government, including the State Department. Upon receiving an ORISE STEM Fellowship (Oak Ridge Institute for Science and Education), James handled biodefense projects, including risk management and risk analysis, for the U.S. Department of Homeland Security’s Science and Technology Directorate

While continuing full-time contract work, James said she wanted to further her education once more in microbiology—leading to her acceptance in Mason Science’s PhD in Biosciences. 

“Everyone in the program is supportive and we really push each other and learn from one another” James said. “Dr. van Hoek has created a really safe space for everyone.”

James said she was thrilled to see she was assigned van Hoek as a mentor after receiving her acceptance letter to the program. “I was familiar with her work and reached out to her immediately to start working in her lab.” 

James said she felt honored to receive Cosmos funding to support her research, as it recognizes the hard work she continues to put forth while balancing her full-time job. She hopes her work will support current scientific research and open the door to broader applications.

• *The programs and services offered by George Mason University are open to all who seek them. George Mason does not discriminate on the basis of race, color, religion, ethnic national origin (including shared ancestry and/or ethnic characteristics), sex, disability, military status (including veteran status), sexual orientation, gender identity, gender expression, age, marital status, pregnancy status, genetic information, or any other characteristic protected by law. After an initial review of its policies and practices, the university affirms its commitment to meet all federal mandates as articulated in federal law, as well as recent executive orders and federal agency directives.