Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Urine protein test: A tipoff to kidney transplant rejection

19.05.2004


Johns Hopkins researchers have developed the basis of an inexpensive, simple urine test that identifies impending kidney failure or rejection following transplant surgery. Their work, presented this week in a special invited lecture to the American Transplant Congress in Boston, Mass., is based on proteins found in urine, and could lead to a urine test kit that may allow many patients to skip painful biopsies.



"This has the potential to radically change the way transplant patients are managed," says study co-author Ernesto P. Molmenti, M.D., Ph.D., associate professor of surgery at Johns Hopkins. "Frequent, noninvasive monitoring could allow doctors to better tailor immunosuppression drugs according to individual patient’s needs, prescribing lower doses to more stable patients or increasing doses for patients who show early signs of rejection."

Molmenti estimates that the test, when developed, will be far less expensive, safer and much less painful than a standard biopsy costing hundreds of dollars in which a doctor inserts a long needle into a patient’s side to obtain a kidney tissue sample.


To build a scientific foundation for the test, Molmenti and colleagues analyzed 34 urine samples from 32 kidney patients at various stages after transplantation. Seventeen patients had organ rejection and 15 had no rejection. Rejection status was confirmed by biopsy. The researchers identified thirteen possible protein markers that were present in most of the urine samples from patients who had organ rejection, but were absent from most non-rejection samples. Three other possible protein markers were found to be lower in patients’ urine with the onset of transplant rejection. A separate analysis using a combination of biomarker candidates in a panel correctly identified 91% of the 34 urine samples.

"Unlike kidney biopsy, a urine test is risk-free, presents no discomfort or restraints to the patients, and samples the entire kidney accurately," says study co-author William Clarke, Ph.D., assistant professor of pathology at Johns Hopkins.


Other researchers involved in the study were Benjamin C. Silverman; Zhen Zhang, Ph.D.; Daniel W. Chan, Ph.D.; and Andrew S. Klein, M.D.

Trent Stockton | EurekAlert!
Further information:
http://www.hopkinsmedicine.org/

More articles from Health and Medicine:

nachricht Investigators may unlock mystery of how staph cells dodge the body's immune system
22.09.2017 | Cedars-Sinai Medical Center

nachricht Monitoring the heart's mitochondria to predict cardiac arrest?
21.09.2017 | Boston Children's Hospital

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: The pyrenoid is a carbon-fixing liquid droplet

Plants and algae use the enzyme Rubisco to fix carbon dioxide, removing it from the atmosphere and converting it into biomass. Algae have figured out a way to increase the efficiency of carbon fixation. They gather most of their Rubisco into a ball-shaped microcompartment called the pyrenoid, which they flood with a high local concentration of carbon dioxide. A team of scientists at Princeton University, the Carnegie Institution for Science, Stanford University and the Max Plank Institute of Biochemistry have unravelled the mysteries of how the pyrenoid is assembled. These insights can help to engineer crops that remove more carbon dioxide from the atmosphere while producing more food.

A warming planet

Im Focus: Highly precise wiring in the Cerebral Cortex

Our brains house extremely complex neuronal circuits, whose detailed structures are still largely unknown. This is especially true for the so-called cerebral cortex of mammals, where among other things vision, thoughts or spatial orientation are being computed. Here the rules by which nerve cells are connected to each other are only partly understood. A team of scientists around Moritz Helmstaedter at the Frankfiurt Max Planck Institute for Brain Research and Helene Schmidt (Humboldt University in Berlin) have now discovered a surprisingly precise nerve cell connectivity pattern in the part of the cerebral cortex that is responsible for orienting the individual animal or human in space.

The researchers report online in Nature (Schmidt et al., 2017. Axonal synapse sorting in medial entorhinal cortex, DOI: 10.1038/nature24005) that synapses in...

Im Focus: Tiny lasers from a gallery of whispers

New technique promises tunable laser devices

Whispering gallery mode (WGM) resonators are used to make tiny micro-lasers, sensors, switches, routers and other devices. These tiny structures rely on a...

Im Focus: Ultrafast snapshots of relaxing electrons in solids

Using ultrafast flashes of laser and x-ray radiation, scientists at the Max Planck Institute of Quantum Optics (Garching, Germany) took snapshots of the briefest electron motion inside a solid material to date. The electron motion lasted only 750 billionths of the billionth of a second before it fainted, setting a new record of human capability to capture ultrafast processes inside solids!

When x-rays shine onto solid materials or large molecules, an electron is pushed away from its original place near the nucleus of the atom, leaving a hole...

Im Focus: Quantum Sensors Decipher Magnetic Ordering in a New Semiconducting Material

For the first time, physicists have successfully imaged spiral magnetic ordering in a multiferroic material. These materials are considered highly promising candidates for future data storage media. The researchers were able to prove their findings using unique quantum sensors that were developed at Basel University and that can analyze electromagnetic fields on the nanometer scale. The results – obtained by scientists from the University of Basel’s Department of Physics, the Swiss Nanoscience Institute, the University of Montpellier and several laboratories from University Paris-Saclay – were recently published in the journal Nature.

Multiferroics are materials that simultaneously react to electric and magnetic fields. These two properties are rarely found together, and their combined...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

“Lasers in Composites Symposium” in Aachen – from Science to Application

19.09.2017 | Event News

I-ESA 2018 – Call for Papers

12.09.2017 | Event News

EMBO at Basel Life, a new conference on current and emerging life science research

06.09.2017 | Event News

 
Latest News

Rainbow colors reveal cell history: Uncovering β-cell heterogeneity

22.09.2017 | Life Sciences

Penn first in world to treat patient with new radiation technology

22.09.2017 | Medical Engineering

Calculating quietness

22.09.2017 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>