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Kidney damage in first responders linked to 9/11

For the first time, researchers have linked high levels of inhaled particulate matter by first responders at Ground Zero to kidney damage. Researchers from the WTC-CHEST Program, a subset of the World Trade Center Health Program Clinical Center for Excellence at Icahn School of Medicine at Mount Sinai, presented their new findings at the 2013 American Society of Nephrology meeting on Nov. 9 during National Kidney Week.

After the 9/11 tragedy, first responders at Ground Zero were exposed to varying levels of a dust cloud of air filled with cement dust, smoke, glass fibers, and heavy metals. The WTC-CHEST Program at Mount Sinai has previously linked this particulate matter exposure to lung and heart abnormalities. However, its effects on the kidney health of first responders have never been explored until now.

In their new study, Mount Sinai researchers examined urine samples of 183 first responders exposed to particulate matter at Ground Zero taking into account each first responder's time of arrival, proximity, duration, and level of exposure at Ground Zero. To assess their kidney damage, researchers measured the level of the protein called albumin in their urine, which when this main blood protein is found in urine it is abnormal and an indicator of renal damage. Research results show a significant link between a high level of exposure to particulate matter by first responders at Ground Zero and the increased level of the protein albumin in their urine.

"Our study shows the first responders with the highest exposure to the 9/11 particulate matter had significantly greater levels of albumin in their urine than the first responders in the study with low exposure levels," says Mary Ann McLaughlin, MD, principal investigator for the WTC-CHEST Program at Icahn School of Medicine at Mount Sinai who also serves as medical director of the Cardiac Health Program and co-director of the Women's Cardiac Assessment and Risk Evaluation Program at The Mount Sinai Hospital. "We believe high exposure to the massive dust cloud of air pollution at Ground Zero may have extremely inflamed the endothelial lining of blood vessels leading to the kidneys causing kidney malfunction and the development of kidney damage in first responders."

Albumin may leak into the urine when kidney function is compromised from inflammation or kidney damage. When albumin starts to spill incorrectly into the urine it is called "albuminuria". A high-level of albuminuria can signal kidney disease from diabetes, high blood pressure, heart failure, and kidney inflammation. Standard medical assessments test for albuminuria to catch kidney disease early. When kidney disease progresses, it can lead to kidney failure, kidney dialysis, or even potentially a kidney transplant.

"We observed a statistically significant and independent relationship between first responder's high exposure to particulate matter and albuminuria," says Dr. McLaughlin. "Our novel research findings will pave the way for the future early diagnosis and care of these first responders' impaired kidney health. Also, in addition, it will lead to further exploration of the impact of environmental exposures and inflammation in the pathogenesis of albuminuria."


Contact: Lauren Woods
The Mount Sinai Hospital / Mount Sinai School of Medicine

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