Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Triptolide: A potential drug for polycystic kidney disease

06.03.2007
A treatment for polycystic kidney disease (PKD), a leading cause of fatal kidney failure worldwide, has been identified by a research team led by Yale biochemist Craig Crews, according to a report in the Proceedings of the National Academy of Sciences.

Over 12 million people worldwide suffer from PKD, a genetic disorder that causes uncontrolled growth of cells lining tubules in the kidneys, and results in the formation of many, large fluid-filled cysts in the kidneys.

“Unfortunately, aside from kidney transplantation, there has been no cure for PKD, nor has there been a suitable drug treatment to slow its progression,” said Crews, associate professor of chemistry, molecular, cellular & developmental biology and pharmacology. “We hope that is about to change,” he said.

The mesh of Traditional Chinese Medicines (TCMs), current advances in chemistry and fundamental processes of developmental biology and health are a research focus for Crews. According to him, a roadblock in the path to TCMs as a source for new medical treatments is lack of understanding the biology and chemistry of how they work.

Triptolide is a potent, biologically active compound isolated from the medicinal ‘Thunder God Vine’ Tripterygium wilfordii Hook F. The TCM tea Lei Gong Teng made from this plant has been used for centuries, as a therapeutic against cancer, inflammation, and auto-immune diseases. Crews and colleagues showed that triptolide causes cell growth arrest in certain cell types.

Normal kidney tubule cells have a built in switch for regulating their growth — two proteins, PKD1 and PKD2, located on a bristle-like cilium that bends in response to fluid flow across the cell. During kidney development, cells destined to line a kidney tubule grow and divide until the tubule is formed, as sensed by fluid flow in the tubule. Fluid flow bends the primary cilium, giving a signal to stop cell growth. PKD is caused by a mutation in the PKD1 or PKD2 gene causing the cells to miss the “stop growing” signal, allowing them to keep growing, and thus generating a cyst.

In collaboration with Stefan Somlo, M.D., Chief of Nephrology at Yale School of Medicine, who discovered the PKD2 gene, triptolide was tested in a mouse model of PKD. Both fewer and smaller kidney cysts formed in mice lacking PKD1 when they were treated with therapeutic amounts of triptolide.

“Our research shows that triptolide, an active ingredient of the TCM Lei Gong Teng, markedly decreases cyst formation in a mouse model of this most common genetic lethal kidney disease,” Crews said. “Our results offer a novel therapeutic approach to this deadly disease and highlight the potential of TCM as pharmaceutical sources.”

Janet Rettig Emanuel | EurekAlert!
Further information:
http://www.yale.edu

More articles from Health and Medicine:

nachricht The genes are not to blame
20.07.2018 | Technische Universität München

nachricht Targeting headaches and tumors with nano-submarines
20.07.2018 | Universitätsmedizin der Johannes Gutenberg-Universität Mainz

All articles from Health and Medicine >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Future electronic components to be printed like newspapers

A new manufacturing technique uses a process similar to newspaper printing to form smoother and more flexible metals for making ultrafast electronic devices.

The low-cost process, developed by Purdue University researchers, combines tools already used in industry for manufacturing metals on a large scale, but uses...

Im Focus: First evidence on the source of extragalactic particles

For the first time ever, scientists have determined the cosmic origin of highest-energy neutrinos. A research group led by IceCube scientist Elisa Resconi, spokesperson of the Collaborative Research Center SFB1258 at the Technical University of Munich (TUM), provides an important piece of evidence that the particles detected by the IceCube neutrino telescope at the South Pole originate from a galaxy four billion light-years away from Earth.

To rule out other origins with certainty, the team led by neutrino physicist Elisa Resconi from the Technical University of Munich and multi-wavelength...

Im Focus: Magnetic vortices: Two independent magnetic skyrmion phases discovered in a single material

For the first time a team of researchers have discovered two different phases of magnetic skyrmions in a single material. Physicists of the Technical Universities of Munich and Dresden and the University of Cologne can now better study and understand the properties of these magnetic structures, which are important for both basic research and applications.

Whirlpools are an everyday experience in a bath tub: When the water is drained a circular vortex is formed. Typically, such whirls are rather stable. Similar...

Im Focus: Breaking the bond: To take part or not?

Physicists working with Roland Wester at the University of Innsbruck have investigated if and how chemical reactions can be influenced by targeted vibrational excitation of the reactants. They were able to demonstrate that excitation with a laser beam does not affect the efficiency of a chemical exchange reaction and that the excited molecular group acts only as a spectator in the reaction.

A frequently used reaction in organic chemistry is nucleophilic substitution. It plays, for example, an important role in in the synthesis of new chemical...

Im Focus: New 2D Spectroscopy Methods

Optical spectroscopy allows investigating the energy structure and dynamic properties of complex quantum systems. Researchers from the University of Würzburg present two new approaches of coherent two-dimensional spectroscopy.

"Put an excitation into the system and observe how it evolves." According to physicist Professor Tobias Brixner, this is the credo of optical spectroscopy....

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

Leading experts in Diabetes, Metabolism and Biomedical Engineering discuss Precision Medicine

13.07.2018 | Event News

Conference on Laser Polishing – LaP: Fine Tuning for Surfaces

12.07.2018 | Event News

11th European Wood-based Panel Symposium 2018: Meeting point for the wood-based materials industry

03.07.2018 | Event News

 
Latest News

A smart safe rechargeable zinc ion battery based on sol-gel transition electrolytes

20.07.2018 | Power and Electrical Engineering

Reversing cause and effect is no trouble for quantum computers

20.07.2018 | Information Technology

Princeton-UPenn research team finds physics treasure hidden in a wallpaper pattern

20.07.2018 | Materials Sciences

VideoLinks
Science & Research
Overview of more VideoLinks >>>