SilicosisNCT01329003
DNA-damage Pathways in Workers Exposed to Silica (Caesar Stone)
An observational study of Silicosis, run by Tel-Aviv Sourasky Medical Center at 1 site in Israel.
Trial summary
Silicosis is well-known occupational disease caused by free crystalline silica (silicon dioxide) and is marked by inflammation and pulmonary fibrosis. There are cumulative evidences that exposure to Caesar stone (quartz surface products that manufactured from up to 93% quartz, polymer resins and pigments) is… Read more about this study
- Who is it for?
- Ages 18 to 70 years, men onlyHealthy volunteers can take part
- Conditions the study is for
- Silicosis
- How many people
- 150 participants
- Where
- 1 siteIsrael
- Study dates
- Sep 2011to Sep 2013
- Phase
- Observational
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 to 70 years
- Men only
- Healthy volunteers accepted
- Adult, Older adult
Study population: At least six months of occupational exposure to Caesar stone
Who may be able to join
- male
- 18-70 years old
- At least six months of professional exposure to Caesar stone
Who cannot join
- Other occupational exposure (welding of any kind)
- Chronic Obstructive Pulmonary Disease (COPD), tuberculosis, asthma, autoimmune disease in healthy exposed workers
- Interstitial lung disease in exposed workers with clinically approved silicosis
Trial locations and contacts
1 site in 1 country.
Israel1 site
Pulmonary Laboratory of Tel Aviv Sourasky Medical Center
Tel Aviv
Daria Bliznuk, BSc, 972-0506353669, dasha_bl@yahoo.com
Elizabeth Fierman, professor, 972-3-6973988, lizif@tasmc.health.gov.il
About this study
Silicosis is well-known occupational disease caused by free crystalline silica (silicon dioxide) and is marked by inflammation and pulmonary fibrosis. There are cumulative evidences that exposure to Caesar stone (quartz surface products that manufactured from up to 93% quartz, polymer resins and pigments) is particularly dangerous to exposed workers.
Goals: To examine correlation between disease and exposure to Caesar stone and genetic differences regarding genes involved in oxidative stress to understand Genetic susceptibility
Read the detailed description
It is a sub-study of "DNA-damage biomarkers to monitor and early detect health impairment in workers exposed to Silica (Caesar Stone)" study. Study participants would be recruited during two years of the study. They will be asked to come to a single visit at Pulmonary Laboratory of Tel Aviv Medical Center. During the meeting, participants will be given a precise explanation about the tests they will perform and after signing the informed consent will perform following tests:
- Induced sputum (IS)
- Exhaled Breath Condensate
- Pulmonary function tests (PFTs)
- Participants will be asked to complete occupational questionnaire
Genetic studies (DNA) will be done from peripheral blood samples (20 ml) to study differences in Heme oxygenase 1 (HO-1) gene sequencing between participants with evidences of clinically definite silicosis according to American Thoracic Society/European Respiratory Society (ATS/ERS) guidelines and participants without evidences of clinically definite silicosis.DNA samples will be obtained and coded in the same day of a participant visit and after collecting reasonable amount of samples examination of genes of interest will be done.Analysis of data will be done after the completion of data collection and laboratory tests.
Each sample will be given specific code to protect confidentiality of participants. Blood samples, test results and the code key will be kept in different places and only few research staff will have the accessibility to genetic information. In any case employers or any other persons that not included in research staff will not have any accessibility to this information. In this study genetic analysis is not connected to gender, nationality or any other social feature.
- Conditions
- Silicosis
- Keywords
- Silicosis
- Medical subject headings
- Silicosis
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
| Study group | Role | What they receive |
|---|---|---|
| exposed workers | At least six months of occupational exposure to Caesar stone |
What is being measured
The primary outcome is the main question the study is designed to answer.
Evidence of clinically definite silicosis according to American Thoracic Society/European Respiratory Society (ATS/ERS)guidelines
- Occupational physician examination
- Pulmonary function tests (PFTs): The measurement will be performed using standard protocols according to American Thoracic Society/European Respiratory Society (ATS/ERS) guidelines. Including Lung diffusion testing
- Computed Tomography (CT) test if need
Measured: one day
Secondary outcomes (1)
Differences in Heme oxygenase 1 (HO-1) gene sequencing
Genetic studies (DNA) will be done from peripheral blood samples (20 ml) to study differences in Heme oxygenase 1 (HO-1) gene sequencing between participants with evidences of clinically definite silicosis according to American Thoracic Society/European Respiratory Society (ATS/ERS) guidelines and participants without evidences of clinically definite silicosis
Measured: one day
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted5 Apr 2011 (estimated)
- Study startSep 2011
- Primary completionSep 2013 (estimated)
- Study completionSep 2013 (estimated)
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for SilicosisStudies of the same condition, open and under way.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Observational
- Time perspective
- Cross-sectional
- Enrolment
- 150 participants (estimated)
Sponsor and investigators
- Lead sponsor
- Tel-Aviv Sourasky Medical Center
- Sponsor type
- Other government
- Collaborators
- Rabin Medical Center
- Investigators
- Yehuda Shwartz, MD, Principal investigator, Tel Aviv medical center. Pulmonary and Allergy department
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT01329003
- Sponsor's protocol ID
- TASMC-11-YS-620-CTIL
- Status last verified
- Mar 2011
- First submitted
- 6 Feb 2011
- Last updated
- 5 Apr 2011
- Results posted
- No
- Data monitoring committee
- No
Study at a glance
From the registry record, last updated by the sponsor on 5 Apr 2011. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- DNA-damage Pathways in Workers Exposed to Silica (Caesar Stone)
- ClinicalTrials.gov ID
- NCT01329003
- Acronym / sponsor ID
- TASMC-11-YS-620-CTIL
- Conditions
- Silicosis
- Keywords
- Silicosis
- Study type
- Observational
- Recruitment status
- Unknown status
- Enrolment
- 150 participants (estimated)
- Lead sponsor
- Tel-Aviv Sourasky Medical CenterOther government
- Collaborators
- Rabin Medical Center
- Study start
- Sep 2011
- Primary completion
- Sep 2013 (estimated)
- Study completion
- Sep 2013 (estimated)
- First posted
- 5 Apr 2011 (estimated)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
Silicosis is well-known occupational disease caused by free crystalline silica (silicon dioxide) and is marked by inflammation and pulmonary fibrosis. There are cumulative evidences that exposure to Caesar stone (quartz surface products that manufactured from up to 93% quartz, polymer resins and pigments) is particularly dangerous to exposed workers.
Goals: To examine correlation between disease and exposure to Caesar stone and genetic differences regarding genes involved in oxidative stress to understand Genetic susceptibility
Detailed description
It is a sub-study of "DNA-damage biomarkers to monitor and early detect health impairment in workers exposed to Silica (Caesar Stone)" study. Study participants would be recruited during two years of the study. They will be asked to come to a single visit at Pulmonary Laboratory of Tel Aviv Medical Center. During the meeting, participants will be given a precise explanation about the tests they will perform and after signing the informed consent will perform following tests:
- Induced sputum (IS)
- Exhaled Breath Condensate
- Pulmonary function tests (PFTs)
- Participants will be asked to complete occupational questionnaire
Genetic studies (DNA) will be done from peripheral blood samples (20 ml) to study differences in Heme oxygenase 1 (HO-1) gene sequencing between participants with evidences of clinically definite silicosis according to American Thoracic Society/European Respiratory Society (ATS/ERS) guidelines and participants without evidences of clinically definite silicosis.DNA samples will be obtained and coded in the same day of a participant visit and after collecting reasonable amount of samples examination of genes of interest will be done.Analysis of data will be done after the completion of data collection and laboratory tests.
Each sample will be given specific code to protect confidentiality of participants. Blood samples, test results and the code key will be kept in different places and only few research staff will have the accessibility to genetic information. In any case employers or any other persons that not included in research staff will not have any accessibility to this information. In this study genetic analysis is not connected to gender, nationality or any other social feature.
Study design
- Time perspective
- Cross-sectional
- Number of arms
- 1
| Arm | Type | Receives |
|---|---|---|
| exposed workers | – | –At least six months of occupational exposure to Caesar stone |
Who may qualify
- Ages
- 18 to 70 years
- Sex
- Male only
- Healthy volunteers
- Accepted
- Age groups
- Adult, Older adult
- Study population
- At least six months of occupational exposure to Caesar stone
Key inclusion criteria (3 listed)
- male
- 18-70 years old
- At least six months of professional exposure to Caesar stone
Key exclusion criteria (3 listed)
- Other occupational exposure (welding of any kind)
- Chronic Obstructive Pulmonary Disease (COPD), tuberculosis, asthma, autoimmune disease in healthy exposed workers
- Interstitial lung disease in exposed workers with clinically approved silicosis
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Primary outcome
Evidence of clinically definite silicosis according to American Thoracic Society/European Respiratory Society (ATS/ERS)guidelines
Time frame: one day
1. Occupational physician examination 2. Pulmonary function tests (PFTs): The measurement will be performed using standard protocols according to American Thoracic Society/European Respiratory Society (ATS/ERS) guidelines. Including Lung diffusion testing 3. Computed Tomography (CT) test if need
1 secondary outcome
Differences in Heme oxygenase 1 (HO-1) gene sequencing
Time frame: one day
Results and safety
Results are not available in the source record.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 5 Apr 2011.
Related trials for Silicosis
Not yet recruitingObservational study
Perioperative Risk Factors Related to the Prognosis of Lung Transplantation: A Retrospective Study
COPD, Interstitial Pneumonia
Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
Yehuda Shwartz, MD principal investigator
Tel Aviv medical center. Pulmonary and Allergy department
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
An observational study of Silicosis, run by Tel-Aviv Sourasky Medical Center at 1 site in Israel.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 3 inclusion and 3 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: status not confirmed, as of the sponsor's last update on 5 Apr 2011. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in Israel. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
Results are not available in the source record.
How can a doctor refer a patient or contact the research team?
Contact Daria Bliznuk, BSc (972-0506353669, dasha_bl@yahoo.com), or a site near the patient. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Evidence of clinically definite silicosis according to American Thoracic Society/European Respiratory Society (ATS/ERS)guidelines (time frame: one day). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 5 Apr 2011.