The zebrafish model has powerful advantages for studying embryonic development, said senior author Michael Tsang, Ph.D., assistant professor, Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine.
"This gives us a better understanding of heart development during the embryonic stage and has implications for adult disease," he noted. "As we try to create treatments that restore normal function to damaged or diseased tissues, it will help us to know the biologic pathways and signals that formed these organs whole and healthy in the first place. This information can be gained by studying developmental biology."
Zebrafish are vertebrate animals whose transparent embryos develop rapidly, are small and easy to handle and, most importantly, grow outside of the mother. In earlier work, Dr. Tsang and his team bred a line of transgenic zebrafish with the gene for green fluorescent protein linked to a key signaling pathway of fibroblast growth factors (FGFs), a family of proteins that are essential in embryonic development.
"The transgenic zebrafish embryos allow us to actually see when a drug or compound influences FGFs because the cells glow green," Dr. Tsang said. "The embryos are like biosensors for FGF signaling, showing us what's happening in real time in living animals."
For the current paper, he and colleagues focused on a small molecule called BCI, which hyperactivated FGF signaling. They then figured out how: BCI blocked the activity of an enzyme called Dusp6, a feedback regulator that would otherwise have tamped down the enhanced FGF signal.
Knowing that, BCI could then be used as a tool to find out what effect Dusp6 inhibition would have on heart development. Zebrafish treated with BCI had a greater number of cardiac progenitor cells and, ultimately, larger hearts, Dr. Tsang said.
Unraveling the fibroblast growth factor pathway has broad implications for improving wound healing as well, Dr. Tsang said. For example, FGF2 has been used in treatment of chronic skin ulcers and following burn surgery in Japan. Thus, BCI alone or in combination with FGF2 might accelerate the healing process and improve wound repair.
Co-authors of the paper include the lead investigator Gabriela Molina, B.S., Wade Znosko, B.S., and Thomas Smithgall, Ph.D., Department of Microbiology and Molecular Genetics; Andreas Vogt, Ph.D., Pierre Queiroz de Oliveira, B.S., and John Lazo, Ph.D., Department of Pharmacology and Chemical Biology; Ahmet Bakan, B.S., Ivet Bahar, Ph.D., Weixiang Dai, Ph.D., and Billy Day, Ph.D., Department of Pharmaceutical Sciences. All authors are from the University of Pittsburgh.
The project was funded by grants from the National Institutes of Health and the Fiske Drug Discovery Fund.
As one of the nation's leading academic centers for biomedical research, the University of Pittsburgh School of Medicine integrates advanced technology with basic science across a broad range of disciplines in a continuous quest to harness the power of new knowledge and improve the human condition. Driven mainly by the School of Medicine and its affiliates, Pitt has ranked among the top 10 recipients of funding from the National Institutes of Health since 1997 and now ranks fifth in the nation, according to preliminary data for fiscal year 2008. Likewise, the School of Medicine is equally committed to advancing the quality and strength of its medical and graduate education programs, for which it is recognized as an innovative leader, and to training highly skilled, compassionate clinicians and creative scientists well-equipped to engage in world-class research. The School of Medicine is the academic partner of UPMC, which has collaborated with the University to raise the standard of medical excellence in Pittsburgh and to position health care as a driving force behind the region's economy. For more information about the School of Medicine, see www.medschool.pitt.edu.
Seeing on the Quick: New Insights into Active Vision in the Brain
15.08.2018 | Eberhard Karls Universität Tübingen
New Approach to Treating Chronic Itch
15.08.2018 | Universität Zürich
Scientists at the University of California, Los Angeles present new research on a curious cosmic phenomenon known as "whistlers" -- very low frequency packets...
Scientists develop first tool to use machine learning methods to compute flow around interactively designable 3D objects. Tool will be presented at this year’s prestigious SIGGRAPH conference.
When engineers or designers want to test the aerodynamic properties of the newly designed shape of a car, airplane, or other object, they would normally model...
Researchers from TU Graz and their industry partners have unveiled a world first: the prototype of a robot-controlled, high-speed combined charging system (CCS) for electric vehicles that enables series charging of cars in various parking positions.
Global demand for electric vehicles is forecast to rise sharply: by 2025, the number of new vehicle registrations is expected to reach 25 million per year....
Proteins must be folded correctly to fulfill their molecular functions in cells. Molecular assistants called chaperones help proteins exploit their inbuilt folding potential and reach the correct three-dimensional structure. Researchers at the Max Planck Institute of Biochemistry (MPIB) have demonstrated that actin, the most abundant protein in higher developed cells, does not have the inbuilt potential to fold and instead requires special assistance to fold into its active state. The chaperone TRiC uses a previously undescribed mechanism to perform actin folding. The study was recently published in the journal Cell.
Actin is the most abundant protein in highly developed cells and has diverse functions in processes like cell stabilization, cell division and muscle...
Scientists have discovered that the electrical resistance of a copper-oxide compound depends on the magnetic field in a very unusual way -- a finding that could help direct the search for materials that can perfectly conduct electricity at room temperatur
What happens when really powerful magnets--capable of producing magnetic fields nearly two million times stronger than Earth's--are applied to materials that...
08.08.2018 | Event News
27.07.2018 | Event News
25.07.2018 | Event News
15.08.2018 | Physics and Astronomy
15.08.2018 | Earth Sciences
15.08.2018 | Physics and Astronomy