Clinical trial NCT02246101: World Trade Center (WTC) RENAL
Official title: Renal and Cardiovascular Impairment in WTC Responders: Implications for Diagnosis and Treatment
Study type: OBSERVATIONAL
Overall status: COMPLETED
Conditions: Cardiac Disease
Cardiopulmonary Disease
Renal Disease
Cardiovascular Disease
Keywords: cardiac disease
cardiopulmonary disease
renal disease
albuminuria
cardiovascular disease
CVD
particulate matter
Lead sponsor: Icahn School of Medicine at Mount Sinai
Sponsor class: OTHER
Collaborators: name: National Institute for Occupational Safety and Health (NIOSH/CDC)
First posted: 2014-09-22
Enrollment: 406
Sex: ALL
Minimum age (years): 40
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: no
Observational model: CASE_ONLY
Time perspective: CROSS_SECTIONAL
Sampling method: NON_PROBABILITY_SAMPLE
Study population: World Trade Center rescue and recovery workers and volunteers who are enrolled in the World Trade Center Health Program-Clinical Center of Excellence, formerly known as the Medical Monitoring Treatment Program and were subsequently enrolled in the WTC-CHEST program.

Brief summary: Environmental toxins exert damaging health effects in workers. Thousands of responders who worked or volunteered on the World Trade Center (WTC) rescue and recovery effort following the September 11, 2001 attacks suffer from health conditions or may be at increased risk for worsening health. In a pilot study, investigators identified the first evidence of kidney damage in subjects with very high exposure at Ground Zero. Specifically, noted was a preliminary association between the intensity of particulate matter exposure and albuminuria, a marker of early chronic kidney disease (CKD), systemic endothelial dysfunction, and increased cardiovascular risk.

The long-term goal is to minimize the risk of CKD and cardiovascular disease (CVD) among individuals exposed to inhaled toxins. The primary objective of this research is to quantify the risk of kidney damage among first responders to the WTC attack and to determine the relationship to particulate matter exposure as well as determine an association between renal and cardiovascular damage in first responders and to explore potential mechanisms. The central hypothesis is that exposure to inhaled particulate matter causes systemic inflammation and endothelial dysfunction that result in chronic kidney and cardiovascular damage. This hypothesis will be investigated in a subgroup of participants from a previously conducted NIOSH-funded study "Pulmonary Function Abnormalities, Diastolic Dysfunction and WTC Exposure: Implications for Diagnosis and Treatment" ("WTC-CHEST," PI Mary Ann McLaughlin).

The proposed study will capitalize on unique resources in WTC-CHEST, including the standardized collection of data on particulate matter exposure and shared risk factors for CKD and cardiovascular disease, and cardiopulmonary function testing. The output from this proposal is anticipated to have a broad impact on understanding the health effects of inhaled particulate matter.

Detailed description: Specific Aim 1. To quantify the risk of kidney damage and the relationship to particulate matter exposure among first responders to the WTC attack.

Urine samples will be collected on 2 occasions for albumin and creatinine. The investigators will define clinically relevant albuminuria as a UACR ≥30 mg/g. If, as hypothesized, the investigators find that albuminuria is more common among WTC responders, this simple and non-invasive measure may be useful in monitoring programs to identify responders at increased risk for adverse outcomes. eGFR will be calculated using the Chronic Kidney Disease Epidemiology Consortium (CKD-EPI) equations.

Specific Aim 2. To examine the relationship between kidney damage and cardiac structure and function among first responders to the WTC attack.

Cardiovascular Disease Risk Screening In order to identify an independent relationship between CKD and cardiac dysfunction, the investigators will comprehensively evaluate potential confounders. Participants will undergo an evaluation of traditional CVD risk factors as accounted for in both the Framingham Risk Score and Reynold's score (medical history, medication use and baseline risk for CVD: smoking status, family history of premature coronary disease, blood pressure, heart rate, height, weight, waist, hip and neck circumference). Laboratory evaluation will include: lipid panel, complete blood count, HbA1C, serum creatinine and cystatin C. Standard questionnaires on chest pain, shortness of breath, depression, sleep apnea and stress, IPSS.

Specific Aim 3. To explore potential mechanisms for kidney and cardiovascular damage among first responders to the WTC attack.

An established marker of systemic inflammation, serum hsCRP, will be measured in all participants. Flow-mediated dilatation, a validated non-invasive measure of endothelial function, will be measured in a subgroup of participants. Heavy metal assays will be performed and will be compared between participants with and without evidence of kidney damage (albuminuria or decreased eGFR) or proximal tubular dysfunction.

Eligibility criteria: Inclusion Criteria:

* WTC responders who were enrolled in the WTC-CHEST program.
* World Trade Center responders who are currently enrolled in the World Trade Center Health Program-Clinical Center of Excellence, formerly known as the WTC Medical Monitoring and Treatment Program
* Over the age of 39 years

Exclusion Criteria:

-

Primary outcomes:
measure: Estimated Glomerular Filtration Rate (eGFR)
timeFrame: Day 1
Secondary outcomes:
measure: Echocardiography
timeFrame: Day 1
measure: Urine Albumin level
timeFrame: Day 1
measure: High Sensitivity C-reactive Protein (hsCRP)
timeFrame: Day 1
Other outcomes:
Locations:
city: New York
country: United States
facility: Icahn School of Medicine at Mount Sinai
state: New York
Study officials:
affiliation: Icahn School of Medicine at Mount Sinai
name: Mary Ann McLaughlin, MD, MPH
role: PRINCIPAL_INVESTIGATOR
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