Type 1 DiabetesEarly Phase 1Alp ExNCT00574639
Mechanisms of Hypoglycemia Associated Autonomic Dysfunction Question 2
A Early Phase 1 study testing Alprazolam in people with Type 1 Diabetes, run by University of Maryland, Baltimore at 1 site in United States.
Trial summary
The purpose of this study is to determine the way by which Alprazolam (Xanax) an anti-anxiety drug affects specialized molecules in your brain called GABA (A) receptors that alter your body's ability to defend itself from low blood sugar (hypoglycemia). Read more about this study
- Who is it for?
- Ages 18 to 50 yearsHealthy volunteers can take part
- Conditions the study is for
- Type 1 Diabetes
- What is being tested?
- Alprazolam
- Type of treatment
- Pill or oral medicine
- Could I receive a placebo?
- Yes, some participants may receive a placebo
- How many people
- 14 participants
- Where
- 1 siteUnited States
- Study dates
- Jul 2007to Jun 2016
- Phase
- Early Phase 1
- 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 50 years
- All sexes
- Healthy volunteers accepted
- Adult
Who may be able to join
- 14 Type 1 DM patients (7 male and 7 female) aged 18-50 years
- HBA1c > 6%
- BMI<35 kg/m2
- 14 healthy individuals (7 male and 7 female) aged 18-50 years, BMI matched
Who cannot join
- Pregnant women
- Subjects unable to give voluntary informed consent
- Subjects on anticoagulant drugs, anemic or with known bleeding diatheses
- Subjects taking any of the following medications will be excluded: Non-selective Beta Blockers, Sedative-Hypnotics, Anticonvulsants, Antiparkinsonian drugs, Antipsychotics, Antidepressants, Mood stabilizers, CNS Stimulants, Opioids, Hallucinogens
- Subjects with a recent medical illness
- Subjects with a history of hypertension, heart disease, cerebrovascular incidents
Show all 15Show fewer
- Subjects with known liver or kidney disease Physical Exam Exclusion Criteria
- History of uncontrolled severe hypertension (i.e., blood pressure greater than 150/95)
- Clinically significant Cardiac Abnormalities (e.g. Heart Failure, Arrhythmia)
- Pneumonia
- Hepatic Failure /Jaundice
- Renal Failure
- Acute Cerebrovascular/ Neurological deficit
- Fever greater than 38.0 C
- Screening Laboratory blood tests Exclusion Criteria according to protocol
Trial locations and contacts
1 site in 1 country.
United States1 site
University of Maryland, Baltimore
Baltimore, Maryland, 21201
About this study
Official title: Mechanisms of Hypoglycemia-Associated Autonomic Dysfunction. The Effect of Alprazolam on Exercise Induced Hypoglycemia.
The purpose of this study is to determine the way by which Alprazolam (Xanax) an anti-anxiety drug affects specialized molecules in your brain called GABA (A) receptors that alter your body's ability to defend itself from low blood sugar (hypoglycemia). We hypothesize that prior activation of GABA (A) receptors may result in blunting of counterregulatory responses during subsequent hypoglycemia and exercise.
Read the detailed description
The ultimate goal of this project is to identify treatments and approaches that will allow patients with diabetes to enjoy all the benefits of good glycemic control without the damaging limitations of severe hypoglycemia. The specific aim of this study is to determine if gamma aminobutyric acid (GABA A) receptors plays a role in the development of exercise associated autonomic dysfunction in type 1 diabetes and healthy man.
- Conditions
- Type 1 Diabetes
- Being tested
- Alprazolam, Placebo
- Keywords
- Type 1 Diabetes, Alprazolam, Exercise
- Medical subject headings
- Diabetes Mellitus, Type 1, Motor Activity
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
AlprazolamDrug
Also called Xanax
1 mg given orally prior to morning and afternoon clamps on Day 1
PlaceboDrug
1 mg given orally prior to glucose clamps on Day 1 (morning and afternoon)
| Study group | Role | What they receive |
|---|---|---|
| Arm 1 | Experimental | Day 1 study two hyperinsulinemic (high Insulin dose) euglycemic (normal glucose level) clamps x 2. Day 2 exercise for 90 minutes on recumbent bike. Patient randomized to placebo or Xanax (Alprazolam) drug on Day 1 to receive 1 mg orally prior to each clamp. Receives: Drug: Alprazolam |
| Arm 2 | Experimental | Day 1 study two hyperinsulinemic (high Insulin dose) euglycemic (normal glucose level) clamps x 2. Day 2 exercise for 90 minutes on recumbent bike. Patient randomized to placebo or Xanax (Alprazolam) drug on Day 1 to receive 1 mg orally prior to each clamp. Receives: Drug: Placebo |
| Arm 3 | Experimental | Day 1 study two hyperinsulinemic (high Insulin dose) hypoglycemic (low glucose level) clamps x 2. Day 2 exercise for 90 minutes on recumbent bike. Patient randomized to placebo or Xanax (Alprazolam) drug on Day 1 to receive 1 mg orally prior to each clamp. Receives: Drug: Alprazolam |
| Arm 4 | Experimental | Day 1 study two hyperinsulinemic (high Insulin dose) hypoglycemic (low glucose level) clamps x 2. Day 2 exercise for 90 minutes on recumbent bike. Patient randomized to placebo or Xanax (Alprazolam) drug on Day 1 to receive 1 mg orally prior to each clamp. Receives: Drug: Placebo |
What is being measured
The primary outcome is the main question the study is designed to answer.
Change in Epinephrine Levels
Measured: 32 weeks
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted17 Dec 2007 (estimated)
- Study startJul 2007
- Primary completionJun 2016
- Study completionJun 2016
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (1)Papers the sponsor has linked to this study.
- Other trials for Type 1 DiabetesStudies of the same condition, open and under way.
- More trials run by University of Maryland, BaltimoreThe 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
- Early Phase 1
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Factorial
- Masking
- Single blind
- Who is masked
- Participant
- Enrolment
- 14 participants (actual)
Sponsor and investigators
- Lead sponsor
- University of Maryland, Baltimore
- Sponsor type
- University, hospital or other
- Collaborators
- National Heart, Lung, and Blood Institute (NHLBI)
- Responsible party
- Principal investigator, Stephen N. Davis, MBBS, University of Maryland, Baltimore
- Investigators
- Stephen N. Davis, MD, Principal investigator, University of Maryland, Baltimore
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT00574639
- Sponsor's protocol ID
- HP-00044868
- Other IDs
- HL056693
- Acronym
- Alp Ex
- Status last verified
- Sep 2019
- First submitted
- 13 Dec 2007
- Last updated
- 12 Sep 2019
- Results posted
- No
- Data monitoring committee
- Yes
Publications
Hedrington MS, Tate DB, Younk LM, Davis SN. Effects of Antecedent GABA A Receptor Activation on Counterregulatory Responses to Exercise in Healthy Man. Diabetes. 2015 Sep;64(9):3253-61. doi: 10.2337/db15-0212. Epub 2015 Apr 21.
PubMed 25901095
Study at a glance
From the registry record, last updated by the sponsor on 12 Sep 2019. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Mechanisms of Hypoglycemia-Associated Autonomic Dysfunction. The Effect of Alprazolam on Exercise Induced Hypoglycemia.
- ClinicalTrials.gov ID
- NCT00574639
- Acronym / sponsor ID
- Alp Ex / HP-00044868
- Conditions
- Type 1 Diabetes
- Keywords
- Type 1 Diabetes, Alprazolam, Exercise
- Phase
- Early Phase 1
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 14 participants (actual)
- Lead sponsor
- University of Maryland, BaltimoreUniversity, hospital or other
- Collaborators
- National Heart, Lung, and Blood Institute (NHLBI)
- Study start
- Jul 2007
- Primary completion
- Jun 2016 (actual)
- Study completion
- Jun 2016 (actual)
- First posted
- 17 Dec 2007 (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 purpose of this study is to determine the way by which Alprazolam (Xanax) an anti-anxiety drug affects specialized molecules in your brain called GABA (A) receptors that alter your body's ability to defend itself from low blood sugar (hypoglycemia). We hypothesize that prior activation of GABA (A) receptors may result in blunting of counterregulatory responses during subsequent hypoglycemia and exercise.
Detailed description
The ultimate goal of this project is to identify treatments and approaches that will allow patients with diabetes to enjoy all the benefits of good glycemic control without the damaging limitations of severe hypoglycemia. The specific aim of this study is to determine if gamma aminobutyric acid (GABA A) receptors plays a role in the development of exercise associated autonomic dysfunction in type 1 diabetes and healthy man.
Study design
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Factorial
- Masking
- Single blind (participant)
- Number of arms
- 4
| Arm | Type | Receives |
|---|---|---|
| Arm 1 | Experimental | Drug: AlprazolamDay 1 study two hyperinsulinemic (high Insulin dose) euglycemic (normal glucose level) clamps x 2. Day 2 exercise for 90 minutes on recumbent bike. Patient randomized to placebo or Xanax (Alprazolam) drug on Day 1 to receive 1 mg orally prior to each clamp. |
| Arm 2 | Experimental | Drug: PlaceboDay 1 study two hyperinsulinemic (high Insulin dose) euglycemic (normal glucose level) clamps x 2. Day 2 exercise for 90 minutes on recumbent bike. Patient randomized to placebo or Xanax (Alprazolam) drug on Day 1 to receive 1 mg orally prior to each clamp. |
| Arm 3 | Experimental | Drug: AlprazolamDay 1 study two hyperinsulinemic (high Insulin dose) hypoglycemic (low glucose level) clamps x 2. Day 2 exercise for 90 minutes on recumbent bike. Patient randomized to placebo or Xanax (Alprazolam) drug on Day 1 to receive 1 mg orally prior to each clamp. |
| Arm 4 | Experimental | Drug: PlaceboDay 1 study two hyperinsulinemic (high Insulin dose) hypoglycemic (low glucose level) clamps x 2. Day 2 exercise for 90 minutes on recumbent bike. Patient randomized to placebo or Xanax (Alprazolam) drug on Day 1 to receive 1 mg orally prior to each clamp. |
Who may qualify
- Ages
- 18 to 50 years
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Adult
Key inclusion criteria (4 listed)
- 14 Type 1 DM patients (7 male and 7 female) aged 18-50 years
- HBA1c > 6%
- BMI<35 kg/m2
- 14 healthy individuals (7 male and 7 female) aged 18-50 years, BMI matched
Key exclusion criteria (15 listed)
- Pregnant women
- Subjects unable to give voluntary informed consent
- Subjects on anticoagulant drugs, anemic or with known bleeding diatheses
- Subjects taking any of the following medications will be excluded: Non-selective Beta Blockers, Sedative-Hypnotics, Anticonvulsants, Antiparkinsonian drugs, Antipsychotics, Antidepressants, Mood stabilizers, CNS Stimulants, Opioids, Hallucinogens
- Subjects with a recent medical illness
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 |
|---|---|---|
| AlprazolamAlso: Xanax1 mg given orally prior to morning and afternoon clamps on Day 1 | Drug | Arm 1, Arm 3 |
| Placebo1 mg given orally prior to glucose clamps on Day 1 (morning and afternoon) | Drug | Arm 2, Arm 4 |
Primary outcome
Change in Epinephrine Levels
Time frame: 32 weeks
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 12 Sep 2019.
- Derived from this study: PubMed 25901095Hedrington MS, Tate DB, Younk LM, Davis SN. Effects of Antecedent GABA A Receptor Activation on Counterregulatory Responses to Exercise in Healthy Man. Diabetes. 2015 Sep;64(9):3253-61. doi: 10.2337/db15-0212. Epub 2015 Apr 21.
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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.
Stephen N. Davis, MD principal investigator
University of Maryland, Baltimore
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A Early Phase 1 study testing Alprazolam in people with Type 1 Diabetes, run by University of Maryland, Baltimore at 1 site in United States.
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 4 inclusion and 15 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: finished, as of the sponsor's last update on 12 Sep 2019. 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 United States. 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.
What does this phase mean?
Early Phase 1 (sometimes called Phase 0) studies give a very small amount of a treatment to a few people, mainly to see how the body handles it.
Not every study follows the same path, and some studies (observational studies, device studies) have no phase.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Change in Epinephrine Levels (time frame: 32 weeks). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT00574639, which also lists 1 linked publication.
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 12 Sep 2019; AzTrials last refreshed its copy on 6 Nov 2026.