Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Anti-aging hormone Klotho inhibits renal fibrosis, cancer growth

14.04.2011
A natural hormone known to inhibit aging can also protect kidneys against renal fibrosis, UT Southwestern Medical Center researchers have demonstrated.

Scientists led by Dr. Makoto Kuro-o, associate professor of pathology, showed in mice that the anti-aging hormone Klotho suppressed both renal fibrosis ¡V a common complication of chronic kidney disease ¡V and the spread of cancer. The findings are available online in the Journal of Biological Chemistry.

More than 26 million people in the U.S. are affected by chronic kidney disease. Researchers say Klotho also helps patients with acute injury of the kidney that obstructs urine outflow or causes a drop in blood flow to the kidney. Nearly half of the patients in hospital intensive care units have some form of kidney injury due to drugs, surgery, bleeding or dehydration, said Dr. Kuro-o, the study's senior author who discovered Klotho more than a decade ago.

"Within a few days after injury, renal function can be completely gone," he said. "We show that Klotho injection in a drip infusion could be effective not only as an initial treatment for acute kidney injury, but also to prevent its progression into chronic kidney disease. This offers real hope for patients with renal disease."

The UT Southwestern researchers focused on mesenchymal cells: multipotent cells that can differentiate into a variety of cell types. These are essential for development and growth, but when the cells are out of balance, they can morph into a pathological form that causes fibrosis (toughening of the tissue layers) and metastasis in cancer cells, said Dr. Kuro-o.

Scientists involved in this study also found that Klotho prevents cancer migration and metastasis. In the study, they blocked a ureter to cause renal fibrosis or introduced human cancer cells in laboratory mice. Secreted Klotho was effective in blocking three signaling pathways ¡V TGF-ƒÒ1, Wnt and IGF-1 ¡V that can cause tissue fibrosis or cancer metastasis.

The researchers reported for the first time that Klotho binds to the cells' transforming growth factor receptor and inhibits signaling required for epithelial-to-mesenchymal transition (EMT), a "master switch" that causes cells to morph into a more pliable form. EMT cancer cells can squeeze into surrounding tissue and eventually into the bloodstream, leading to metastatic spreading of cancer.

"This is further evidence that Klotho is an understudied tumor-suppressor and really quite important because it's secreted and flows through the body," said Dr. David Boothman, professor of radiation oncology and pharmacology, associate director for translational research and an author of the study. "It could be a major surveillance mechanism for blocking tumor formation and progression."

Other UT Southwestern researchers involved in the study were lead author Dr. Shigehiro Doi, former postdoctoral researcher in pathology now at Hiroshima University in Japan; co-lead author Dr. Yonglong Zou, research associate in the Harold C. Simmons Comprehensive Cancer Center; Dr. Osamu Togao, postdoctoral researcher in the Advanced Imaging Research Center (AIRC); Johanne Pastor, senior research associate in pathology; Dr. George John, instructor of pathology; Lei Wang, research assistant in pathology; Dr. Kazuhiro Shizaki, instructor of pathology; and Dr. Masaya Takahashi, associate professor of radiology and in the AIRC.

Funding for the study was provided in part by grants from the National Institutes of Health, the Department of Energy, Genzyme Corp. and Philips Japan.

Visit www.utsouthwestern.org/cancer to learn more about UT Southwestern's clinical services in cancer. For more about clinical services in urology at UT Southwestern, visit www.utsouthwestern.org/urology .

This news release is available on our World Wide Web home page at http://www.utsouthwestern.edu/home/news/index.html

To automatically receive news releases from UT Southwestern via email, subscribe at www.utsouthwestern.edu/receivenews

Robin Russell | EurekAlert!
Further information:
http://www.utsouthwestern.edu

More articles from Life Sciences:

nachricht Flow of cerebrospinal fluid regulates neural stem cell division
21.05.2018 | Helmholtz Zentrum München - Deutsches Forschungszentrum für Gesundheit und Umwelt

nachricht Chemists at FAU successfully demonstrate imine hydrogenation with inexpensive main group metal
21.05.2018 | Friedrich-Alexander-Universität Erlangen-Nürnberg

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

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

Im Focus: Explanation for puzzling quantum oscillations has been found

So-called quantum many-body scars allow quantum systems to stay out of equilibrium much longer, explaining experiment | Study published in Nature Physics

Recently, researchers from Harvard and MIT succeeded in trapping a record 53 atoms and individually controlling their quantum state, realizing what is called a...

Im Focus: Dozens of binaries from Milky Way's globular clusters could be detectable by LISA

Next-generation gravitational wave detector in space will complement LIGO on Earth

The historic first detection of gravitational waves from colliding black holes far outside our galaxy opened a new window to understanding the universe. A...

Im Focus: Entangled atoms shine in unison

A team led by Austrian experimental physicist Rainer Blatt has succeeded in characterizing the quantum entanglement of two spatially separated atoms by observing their light emission. This fundamental demonstration could lead to the development of highly sensitive optical gradiometers for the precise measurement of the gravitational field or the earth's magnetic field.

The age of quantum technology has long been heralded. Decades of research into the quantum world have led to the development of methods that make it possible...

Im Focus: Computer-Designed Customized Regenerative Heart Valves

Cardiovascular tissue engineering aims to treat heart disease with prostheses that grow and regenerate. Now, researchers from the University of Zurich, the Technical University Eindhoven and the Charité Berlin have successfully implanted regenerative heart valves, designed with the aid of computer simulations, into sheep for the first time.

Producing living tissue or organs based on human cells is one of the main research fields in regenerative medicine. Tissue engineering, which involves growing...

Im Focus: Light-induced superconductivity under high pressure

A team of scientists of the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) at the Center for Free-Electron Laser Science in Hamburg investigated optically-induced superconductivity in the alkali-doped fulleride K3C60under high external pressures. This study allowed, on one hand, to uniquely assess the nature of the transient state as a superconducting phase. In addition, it unveiled the possibility to induce superconductivity in K3C60 at temperatures far above the -170 degrees Celsius hypothesized previously, and rather all the way to room temperature. The paper by Cantaluppi et al has been published in Nature Physics.

Unlike ordinary metals, superconductors have the unique capability of transporting electrical currents without any loss. Nowadays, their technological...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

Save the date: Forum European Neuroscience – 07-11 July 2018 in Berlin, Germany

02.05.2018 | Event News

Invitation to the upcoming "Current Topics in Bioinformatics: Big Data in Genomics and Medicine"

13.04.2018 | Event News

Unique scope of UV LED technologies and applications presented in Berlin: ICULTA-2018

12.04.2018 | Event News

 
Latest News

Supersonic waves may help electronics beat the heat

18.05.2018 | Power and Electrical Engineering

Keeping a Close Eye on Ice Loss

18.05.2018 | Information Technology

CrowdWater: An App for Flood Research

18.05.2018 | Information Technology

VideoLinks
Science & Research
Overview of more VideoLinks >>>