AsthmaNCT00162422
Genetic Determinants of the Bronchodilatation Effect of Albuterol ex-Vivo
A study testing albuterol in people with Asthma, run by Hadassah Medical Organization at 1 site in Israel.
Trial summary
The role played by ß2AR polymorphisms in determining the bronchial response to ß2AR agonist drugs, has been confirmed by several studies. The purpose of the present study is to examine possible causal relationships between genetically based alteration in the structure of ß2AR and drug responsiveness. Read more about this study
- Who is it for?
- Ages 18 years and older
- Conditions the study is for
- Asthma
- What is being tested?
- albuterol
- How many people
- 150 participants
- Where
- 1 siteIsrael
- Study dates
- Aug 2003to not given
- Phase
- Interventional
- 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 years and older
- All sexes
- No healthy volunteers
- Adult, Older adult
Who may be able to join
- Macroscopically normal pulmonary tissue
Who cannot join
- The presence of pathological finding in the pulmonary tissue
Trial locations and contacts
1 site in 1 country.
Israel1 site, 1 recruiting
- Recruiting
Hadassah Medical Organization
Jerusalem
Arik Tzukert, DMD, 00 972 2 6776095, arik@hadassah.org.il
Hadas Lemberg, PhD, 00 972 2 6777572, lhadas@hadassah.org.il
About this study
Official title: The Effect of β2 Genetic Polymorphisms on the Brochodilatation Effect of Albuterol ex-Vivo
The role played by ß2AR polymorphisms in determining the bronchial response to ß2AR agonist drugs, has been confirmed by several studies.
The purpose of the present study is to examine possible causal relationships between genetically based alteration in the structure of ß2AR and drug responsiveness. An ex-vivo model (organ bath technique) will be used to investigate association between polymorphisms in the coding region of ß2AR and the response of bronchial rings derived from human lung tissue to the respective agonists (i.e. salbutamol).
Read more
In the second part of the study the same bronchial rings will be incubated for 24 hours in a solution containing fixed concentration of albuterol. A second dose response curve for rising concentrations of albuterol will be constructed and a relationship between β2 genetic polymorphisms and the extent of desensitization to albuterol will be investigated.
In addition, through specifically designed receptor binding assay the bronchial tissue will be used to define the affinity (Kd) and expression (Vmax) of the ß2 receptor. These data will enable to enhance our understanding regarding the mechanism responsible for the association noted between ß2AR polymorphism and altered drug effect.
- Conditions
- Asthma
- Being tested
- albuterol
- Medical subject headings
- Asthma
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
albuterolDrug
What is being measured
The primary outcome is the main question the study is designed to answer.
The extent of bronchial dilatation ex-vivo
The extent of decrease in brochial dilatation after prolonged incubation with albuterol
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted13 Sep 2005 (estimated)
- Study startAug 2003
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for AsthmaStudies of the same condition, open and under way.
- More trials run by Hadassah Medical OrganizationThe sponsor's other registered studies.
- 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
- Interventional
- Phase
- Phase N/A
- Primary purpose
- Treatment
- Allocation
- Non-randomised
- Intervention model
- Single group
- Masking
- None (open label)
- Enrolment
- 150 participants (estimated)
Sponsor and investigators
- Lead sponsor
- Hadassah Medical Organization
- Sponsor type
- University, hospital or other
- Investigators
- Yoseph Caraco, ND, Principal investigator, Hadassah Medical Organization
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT00162422
- Sponsor's protocol ID
- yc19557-HMO-CTIL
- Status last verified
- Oct 2008
- First submitted
- 11 Sep 2005
- Last updated
- 29 Oct 2008
- Results posted
- No
Study at a glance
From the registry record, last updated by the sponsor on 29 Oct 2008. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- The Effect of β2 Genetic Polymorphisms on the Brochodilatation Effect of Albuterol ex-Vivo
- ClinicalTrials.gov ID
- NCT00162422
- Acronym / sponsor ID
- yc19557-HMO-CTIL
- Conditions
- Asthma
- Study type
- Interventional
- Recruitment status
- Unknown status
- Enrolment
- 150 participants (estimated)
- Lead sponsor
- Hadassah Medical OrganizationUniversity, hospital or other
- Study start
- Aug 2003
- First posted
- 13 Sep 2005 (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.
The role played by ß2AR polymorphisms in determining the bronchial response to ß2AR agonist drugs, has been confirmed by several studies.
The purpose of the present study is to examine possible causal relationships between genetically based alteration in the structure of ß2AR and drug responsiveness. An ex-vivo model (organ bath technique) will be used to investigate association between polymorphisms in the coding region of ß2AR and the response of bronchial rings derived from human lung tissue to the respective agonists (i.e. salbutamol).
In the second part of the study the same bronchial rings will be incubated for 24 hours in a solution containing fixed concentration of albuterol. A second dose response curve for rising concentrations of albuterol will be constructed and a relationship between β2 genetic polymorphisms and the extent of desensitization to albuterol will be investigated.
In addition, through specifically designed receptor binding assay the bronchial tissue will be used to define the affinity (Kd) and expression (Vmax) of the ß2 receptor. These data will enable to enhance our understanding regarding the mechanism responsible for the association noted between ß2AR polymorphism and altered drug effect.
Study design
- Primary purpose
- Treatment
- Allocation
- Non-randomised
- Intervention model
- Single group
- Masking
- None (open label)
Who may qualify
- Ages
- 18 years and older
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (1 listed)
- Macroscopically normal pulmonary tissue
Key exclusion criteria (1 listed)
- The presence of pathological finding in the pulmonary tissue
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| albuterol | Drug | – |
Primary outcome
The extent of bronchial dilatation ex-vivo
The extent of decrease in brochial dilatation after prolonged incubation with albuterol
Results and safety
Results are not available in the source record.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 29 Oct 2008.
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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.
Yoseph Caraco, ND principal investigator
Hadassah Medical Organization
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A study testing albuterol in people with Asthma, run by Hadassah Medical Organization 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 1 inclusion and 1 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 29 Oct 2008. 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 Arik Tzukert, DMD (00 972 2 6776095, arik@hadassah.org.il), or a site near the patient. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
The extent of bronchial dilatation ex-vivo. The study lists 2 primary outcomes in all. 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 29 Oct 2008.