Featured Research

from universities, journals, and other organizations

Simple Lab Test For Bone Disease Linked To Risk Of Death In Dialysis Patients

Date:
August 2, 2008
Source:
American Society of Nephrology
Summary:
Among patients receiving dialysis for chronic kidney disease, high levels of alkaline phosphatase -- a routinely measured laboratory marker of bone disease -- may signal an increased risk of death, reports a new study.

Among patients receiving dialysis for chronic kidney disease (CKD), high levels of alkaline phosphatase—a routinely measured laboratory marker of bone disease—may signal an increased risk of death, according to new research.

Related Articles


"This large epidemiologic study shows, for the first time, a consistent and robust association between a high blood level of alkaline phosphatase and cardiovascular death in thousands of dialysis patients across the United States," comments Kamyar Kalantar-Zadeh, MD, of the University of California Los Angeles, one of the study authors. "If the association between alkaline phosphatase and mortality has a causal link, treatment strategies that reduce alkaline phosphatase levels may improve survival in patients with CKD, and probably in many other patients with chronic diseases and active bone disorders."

The researchers analyzed data on nearly 74,000 hemodialysis patients in DaVita dialysis clinics during a three-year period. Laboratory measurements of alkaline phosphatase level measured in a DaVita laboratory center were analyzed as a possible predictor of mortality risk. In dialysis patients, alkaline phosphatase levels are routinely measured to monitor metabolic bone disease, a common complication of CKD. However, current guidelines do not include specific recommendations or targets for serum alkaline phosphatase in CKD patients.

The results showed that patients with higher alkaline phosphatase levels were at higher risk of death during the three-year follow-up period. After adjustment for a wide range of other risk factors, patients with alkaline phosphatase levels above the upper limit of normal (>120 IU/L) had a 25 percent increase in mortality rate.

The link between alkaline phosphatase and mortality was significant across various subgroups of dialysis patients. Surprisingly, this included patients without hepatitis or other liver diseases, which can also cause increased alkaline phosphatase levels; as well as patients who had normal serum liver function or normal nutritional status, reflected by normal serum albumin levels. In addition, patients whose alkaline phosphatase level increased during the first six months of the study were at higher risk of death over the subsequent two and one-half years.

"In dialysis patients, increased levels of alkaline phosphatase in the blood indicate a so-called high-turnover bone disease, which can happen due to hormonal imbalance in CKD," explains Dr. Kalantar-Zadeh. Previous studies have also found evidence of a link between bone disease and cardiovascular health in CKD patients. "Alkaline phosphatase has recently been shown to be associated with increased vascular calcification in experimental studies," he adds. "Our study shows the clinical manifestations of this association in real-world patients."

The study permits no conclusions as to whether high alkaline phosphatase levels are actually responsible for the increase in mortality risk. Dr. Kalantar-Zadeh concludes, "For the ultimate proof of causation, treatment trials are needed to target high bone turnover diseases to reduce serum alkaline phosphatase effectively, and then to ascertain whether these interventions can improve survival."

Dr. Kalantar-Zadeh has received grants and honoraria from Abbott and Genzyme (manufacturers of activated vitamin D products), Amgen (manufacturer of calcimimetic drugs, which reduce parathyroid hormone), and Shire and Fresenius (manufacturers of phosphorus binders). The study was supported by a grant from the National Institutes of Health's National Institute of Diabetes and Digestive and Kidney Diseases.


Story Source:

The above story is based on materials provided by American Society of Nephrology. Note: Materials may be edited for content and length.


Journal Reference:

  1. Serum Alkaline Phosphatase Predicts Mortality Among Maintenance Hemodialysis Patients. Journal of the American Society of Nephrology, July 30, 2008 online, November 2008 print issue

Cite This Page:

American Society of Nephrology. "Simple Lab Test For Bone Disease Linked To Risk Of Death In Dialysis Patients." ScienceDaily. ScienceDaily, 2 August 2008. <www.sciencedaily.com/releases/2008/07/080730175514.htm>.
American Society of Nephrology. (2008, August 2). Simple Lab Test For Bone Disease Linked To Risk Of Death In Dialysis Patients. ScienceDaily. Retrieved October 25, 2014 from www.sciencedaily.com/releases/2008/07/080730175514.htm
American Society of Nephrology. "Simple Lab Test For Bone Disease Linked To Risk Of Death In Dialysis Patients." ScienceDaily. www.sciencedaily.com/releases/2008/07/080730175514.htm (accessed October 25, 2014).

Share This



More Health & Medicine News

Saturday, October 25, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

IKEA Desk Converts From Standing to Sitting With One Button

IKEA Desk Converts From Standing to Sitting With One Button

Buzz60 (Oct. 24, 2014) IKEA is out with a new convertible desk that can convert from a sitting desk to a standing one with just the push of a button. Jen Markham explains. Video provided by Buzz60
Powered by NewsLook.com
Ebola Protective Suits Being Made in China

Ebola Protective Suits Being Made in China

AFP (Oct. 24, 2014) A factory in China is busy making Ebola protective suits for healthcare workers and others fighting the spread of the virus. Duration: 00:38 Video provided by AFP
Powered by NewsLook.com
WHO: Millions of Ebola Vaccine Doses by 2015

WHO: Millions of Ebola Vaccine Doses by 2015

AP (Oct. 24, 2014) The World Health Organization said on Friday that millions of doses of two experimental Ebola vaccines could be ready for use in 2015 and five more experimental vaccines would start being tested in March. (Oct. 24) Video provided by AP
Powered by NewsLook.com
Doctor in NYC Quarantined With Ebola

Doctor in NYC Quarantined With Ebola

AP (Oct. 24, 2014) An emergency room doctor who recently returned to the city after treating Ebola patients in West Africa has tested positive for the virus. He's quarantined in a hospital. (Oct. 24) Video provided by AP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Health & Medicine

Mind & Brain

Living & Well

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins