Firefighter Collaborative Research Project

Exposure Clinical Trial

— FCRP  

Official title:

Firefighter Collaborative Research Project

Clinical Trial Details — Status: Recruiting

Administrative data

• NCT number: NCT05869747
• Other study ID #: FCRP
• Status: Recruiting
• Phase: N/A
• Start date: June 22, 2023
• Est. completion date: December 31, 2025

Study information

• Verified date: April 2024
• Source: University of Arizona
• Contact: Olivia Healy
• Phone: (520) 626-3236
• Email: healyo[@]arizona.edu
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial Summary

The goal of this research is to test interventions to reduce firefighter cardiovascular, cognitive, and overall disease risks, including but not limited to risks associated with Per- and Polyfluorinated Substances (PFAS) exposure. Approximately 1,500 - 2,000 firefighters will be enrolled in the Fire Fighter Cancer Cohort Study (FFCCS). Among these individuals, those that express interest will then be screened for eligibility for the Firefighter Collaborative Research Project (FCRP) using information they provided for the Fire Fighter Cancer Cohort Study. Firefighters enrolled in the study will provide an initial blood sample and urine sample. The blood sample will be analyzed to determine the participant's PFAS levels. Based upon serum PFAS levels and responses from the screening survey, eligible participants will be randomly assigned into one of the following interventions: 1. Blood Donation, or Plasma Donation or Blood/Plasma Control Group; 2. Zone 2 Training or Zone 2 Control; 3. Intermittent Fasting or Intermittent Fasting Control. Individuals participating in the blood donation, plasma donation or blood/plasma control group would donate blood every 12 weeks, plasma every 6 weeks, or not donate blood or plasma. Participants in this intervention arm would continue this for a 12-month period. Individuals in the zone 2 training, zone 2 training control, intermittent fasting or intermittent fasting control group would participate in their intervention or control for a 4-month period. After 4 to 12 months participating in an intervention or control group, participants will be asked to provide a final urine sample and blood draw to determine if and to what degree their PFAS levels or other cardiovascular disease and other health risks have changed.

Recruitment information / eligibility

• Status: Recruiting
• Enrollment: 1500
• Est. completion date: December 31, 2025
• Est. primary completion date: December 31, 2025
• Accepts healthy volunteers: Accepts Healthy Volunteers
• Gender: All
• Age group: 18 Years and older

Eligibility

Inclusion Criteria:

• • Active firefighter (including emergency medical responder and all firefighter subgroups) with either a volunteer or career status

• Individual plans to remain in active service with their current agency for the next 2 years (not planning to retire or resign)

• 18 years of age and older

• Fluently speak and write in English

• All genders, races, and ethnicities

• Enrolled in the Fire Fighter Cancer Cohort Study (FFCCS) prior to enrolling in the Firefighter Collaborative Research Project (FCRP)

• Complete a signed and dated informed consent document that indicates the participant has been informed of all aspects of the study prior to enrollment

• Agree to avoid participating in FCRP intervention activities outside of their assigned intervention group for the duration of the study

• Able to comply with scheduled visits, laboratory tests and other study procedures

• BMI of 17.5 kg/m2 or greater and be greater than 115 pounds

• Must also be eligible to donate blood and blood-based products if randomized into the blood or plasmapheresis intervention groups

Exclusion criteria from overall study:

• Not able to fluently speak or write in English

• Less than 18 years of age

• Currently a tobacco smoker or vaping (e.g. >2 cigarettes or cigars, or incidents of vaping in the past month)

• Those with planned travel or extended leave (e.g. >6 weeks) that would prevent their ability to participate in other interventions

• Those who are pregnant, breastfeeding, or have given birth within the past year

• Those with a history or diagnosis of any significant metabolic, hematologic, pulmonary, cardiovascular, gastrointestinal, neurological, immune, hepatic, renal, urological disorders, severe injury or cancer that, in the opinion of the investigator, would potentially put the candidate at risk.

Exclusion criteria from blood or plasma donation intervention:

• Those from departments outside the state of Arizona

• Those with any medical contraindication (medical condition or medication) to blood donation

• Those that donated blood or plasma in the past three months

• Those knowing they have a condition indicative of levels of hemoglobin, hematocrit, red blood cells, or iron below the lower limit of normal levels

Exclusion criteria from the intermittent fasting intervention:

• Those from departments outside the state of Arizona

• Those with a history or diagnosis of diabetes, hypoglycemia thyroid disease, and/or an eating disorder

• Those who recently participated in intermittent fasting or Time Restricted Eating

• Those that recently used antidiabetic medication such as Semaglutide (sold as Ozempic, Wegovy, and Rybelsus) or Tirzepatide (sold as Mounjaro) for the treatment of type 2 diabetes or for weight loss will also be excluded from this group.

• Use of drugs that might affect intermittent fasting or eating behaviors

Exclusion from the zone-2 physical activity intervention:

• Currently participating in more than 90 minutes per week of aerobic, cardiovascular training (e.g. jogging, cycling, walking, swimming, HIIT) at >60% of their max heart rate.

Related Conditions & MeSH terms

• Cardiopulmonary
• Exposure

Intervention

Behavioral:
• Blood Donation
Participants asked to donate whole blood at a donation facility from a list provided by the study.
• Plasma Donation
Participants asked to donate plasma at a donation facility from a list provided by the study.
• Zone 2 Training
Participants asked to work out in their custom Zone 2 heart range 4 times a week for 45 to 60 minutes.
• Intermittent Fasting
Participants asked to engage in an intermittent fasting routine of a 16 hour fast followed by an 8 hour eating period at least 4 times a week.
• Surveys
Participants were asked to complete surveys throughout the study to monitor intervention progress and to collect baseline and end-of-study data.

Locations

Country	Name	City	State
United States	Gilbert Fire & Rescue Department	Gilbert	Arizona
United States	Green Valley Fire	Green Valley	Arizona
United States	Drexel Heights Fire	Tucson	Arizona
United States	Northwest Fire District	Tucson	Arizona
United States	Tucson Fire Department Headquarters	Tucson	Arizona
United States	Tucson Fire Department Station 9	Tucson	Arizona
United States	University of Arizona	Tucson	Arizona

Sponsors (2)

Lead Sponsor	Collaborator
University of Arizona	Arizona State University

Country where clinical trial is conducted

United States, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Change in concentration of PFAS levels in serum	PFAS levels are per- and polyfluoroalkyl substance levels measured from a biological sample	12 months
Primary	Change in epigenetic age	Epigenetic age is a mathematically derived age estimators that are based on combinations of methylation values that change with age at specific CpGs in the genome.	4 months