In collaboration with Mark Widrlechner, a horticulturist with the ARS crop genebank at the North Central Regional Plant Introduction Station in Ames, scientists from the Center for Research on Botanical Dietary Supplements (CRBDS) are screening 180 germplasm accessions of St. John's wort for biologically active compounds. Some may be worth evaluating further in clinical trials for their potential to combat viral infections, reduce inflammation or improve digestive health.
Established in 1948, the ARS Ames crop genebank curates more than 50,000 accessions of ornamental plants, maize, oilseeds, vegetables and other crops, and provides them to researchers for many applications. Accessions with medicinal or nutraceutical value include Echinacea (purple coneflower), Hypericum, Prunella (self-heal) and Actaea racemosa (black cohosh). ARS horticulturist Luping Qu curates the collection and Widrlechner coordinates its use for research at CRBDS, one of six Botanical Research Centers funded by the National Institutes of Health from 2005-2010.
The Hypericum collection at Ames was started in the 1990s and today encompasses about 60 species collected from around the world. This diversity has enabled investigations of genetic, environmental and developmental factors affecting the quantity and quality of bioactive compounds, as well as their modes of action.
Of particular interest is how these compounds interact, and whether those interactions are critical to human health benefits. In a recent issue of Pharmaceutical Biology, researchers noted that combinations of four compounds from St. John's wort (amentoflavone, chlorogenic acid, pseudohypericin and quercetin) were more effective at reducing inflammation in mouse macrophage assays than when each was used alone.
Widrlechner's collaborators include Diane Birt, Kimberly Hammer, Matthew Hillwig, Jingqiang Wei, George Kraus, Patricia Murphy and Eve Wurtele at Iowa State University; Jeffrey Neighbors, David Wiemer, Wendy Maury and Jason Price at the University of Iowa; and Joe-Ann McCoy, formerly with ARS.
ARS is the principal intramural scientific research agency of the U.S. Department of Agriculture (USDA). The research supports the USDA priority of improving human nutrition and health.
Jan Suszkiw | EurekAlert!
New 3-D model predicts best planting practices for farmers
26.06.2017 | Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign
Fighting a destructive crop disease with mathematics
21.06.2017 | University of Cambridge
Physicists working with researcher Oriol Romero-Isart devised a new simple scheme to theoretically generate arbitrarily short and focused electromagnetic fields. This new tool could be used for precise sensing and in microscopy.
Microwaves, heat radiation, light and X-radiation are examples for electromagnetic waves. Many applications require to focus the electromagnetic fields to...
Strong light-matter coupling in these semiconducting tubes may hold the key to electrically pumped lasers
Light-matter quasi-particles can be generated electrically in semiconducting carbon nanotubes. Material scientists and physicists from Heidelberg University...
Fraunhofer IPA has developed a proximity sensor made from silicone and carbon nanotubes (CNT) which detects objects and determines their position. The materials and printing process used mean that the sensor is extremely flexible, economical and can be used for large surfaces. Industry and research partners can use and further develop this innovation straight away.
At first glance, the proximity sensor appears to be nothing special: a thin, elastic layer of silicone onto which black square surfaces are printed, but these...
3-D shape acquisition using water displacement as the shape sensor for the reconstruction of complex objects
A global team of computer scientists and engineers have developed an innovative technique that more completely reconstructs challenging 3D objects. An ancient...
Physicists have developed a new technique that uses electrical voltages to control the electron spin on a chip. The newly-developed method provides protection from spin decay, meaning that the contained information can be maintained and transmitted over comparatively large distances, as has been demonstrated by a team from the University of Basel’s Department of Physics and the Swiss Nanoscience Institute. The results have been published in Physical Review X.
For several years, researchers have been trying to use the spin of an electron to store and transmit information. The spin of each electron is always coupled...
26.07.2017 | Event News
21.07.2017 | Event News
19.07.2017 | Event News
27.07.2017 | Life Sciences
27.07.2017 | Life Sciences
27.07.2017 | Health and Medicine