AzTrials
AzTrials

DepressionPhase 1PGRN-SSRINCT00613470

Pharmacodynamics and Pharmacokinetics of Citalopram and Escitalopram

A Phase 1 study testing citalopram and escitalopram in people with Depression, run by Mayo Clinic at 1 site in United States.

Completed

Finished. The study has ended and is not enrolling. Results may be posted on the official record.

Official record
Search all trials

Trial summary

This study is one component of a larger U01 grant that was submitted in August, 2004 to the NIGMS as part of the Pharmacogenomic Research Network. This study will enroll 1200 patients over 4 years. Read more about this study

Who is it for?
Ages 18 to 85 years
Conditions the study is for
Depression
What is being tested?
citalopram and escitalopram
Type of treatment
Pill or oral medicine
Could I receive a placebo?
No, everyone receives an active treatment
How many people
927 participants
Where
1 siteUnited States
Study dates
Mar 2005to May 2013
Phase
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 85 years
  • All sexes
  • No healthy volunteers
  • Adult, Older adult

Who may be able to join

  • Outpatients or inpatients with nonpsychotic MDD.
  • A score of >14 on the HRS-D17 (equivalent to 10 or greater on PHQ-9 which is used in primary care to assess depression) given that when medication exceeds the effect of placebo in primary care participants have a HRS-D17 >12. We added 2 HRS-D17 points to take into account the possibility of measurement error.
  • Outpatients or inpatients for whom antidepressant treatment is deemed appropriate by the treating clinician.
  • Subjects who are between 18-85 years of age.
  • Participants who have general medical conditions (GMCs) which could conceivably be physiologically causing their depressive symptoms will receive treatment as usual for their GMCs as well as for their MDD.

Who cannot join

  • Subjects with medical contraindications that preclude citalopram or escitalopram treatment and those who have previously failed to respond to citalopram or escitalopram will be excluded. In addition, patients with schizophrenia, schizoaffective disorder, or who have Bipolar I disorder will be excluded because they have a primary psychiatric condition that requires a different initial treatment. Subjects currently on antidepressant medication with subtherapeutic results in terms of depression management will undergo a medication taper and discontinuation prior to initiation of citalopram or escitalopram treatment. The subject will be closely monitored by the primary physician or psychiatrist during the medication taper and discontinuation phase. The medication taper is left upto the treating physician's or psychiatrist's discretion. Study subjects who cannot be safely tapered from their medication or experience adverse effects during the taper will be excluded from the study. Study subjects using their antidepressant medication for management of nicotine dependence, chronic pain, migraine prophylaxis or other diagnoses will not be eligible for the study. Trazodone, Melatonin, and Diphenhydramine may be used as rescue medications for insomnia. Benzodiazepines may be used for treatment of anxiety and atomoxetine may be used for the treatment of attention deficit disorder. Study subjects currently on antipsychotic medications (e.g., typical and atypical antipsychotic drugs) and mood stabilizing agents (e.g., lithium, carbamazepine, valproate, lamotrigine, gabapentin, or other anticonvulsants) are not eligible for the study with the exception of those starting quetiapine after baseline. Subjects unable to give informed consent are excluded. Pregnant subjects will be excluded.

Trial locations and contacts

1 site in 1 country.

United States1 site

  • Mayo Clinic

    Rochester, Minnesota, 55905

Other trials in United States

About this study

This study is one component of a larger U01 grant that was submitted in August, 2004 to the NIGMS as part of the Pharmacogenomic Research Network. This study will enroll 1200 patients over 4 years.

It is known that functionally significant genetic polymorphisms for the cytochrome P450 (CYPs) can contribute to individual differences in response to specific selective serotonin reuptake inhibitors (SSRIs). However, a better understanding of the pharmacogenomics of both PK and PD for SSRI antidepressants will inform clinical practice. Therefore, we propose to evaluate the contribution of pharmacogenomics to variation in response to the highly specific SSRIs citalopram (a racemic mixture) and escitalopram (a chiral compound containing the active S-isomer of citalopram ) by correlating both PK and PD variation for these agents with intragene haplotypes in genes encoding proteins involved in citalopram metabolism, as well as central nervous system (CNS) pathways for monoamine neurotransmitter biosynthesis, metabolism, storage, release, reuptake, and receptors. In the future this "candidate pathway" intragene haplotype genotyping strategy will also be complemented by the application of genome-wide screens performed with DNA from subjects with extreme phenotypes for response to citalopram.

Phenotypes to be measured before and after the initiation of citalopram or escitalopram therapy will include determinations of serum citalopram and metabolite concentrations, treatment response as measured by Hamilton Rating Scale for Depression indices, and number and severity of side effects as determined by structured questionnaires. The hypothesis to be tested is that inherited variation in citalopram metabolism and transport (PK) and/or PD variation as a result of inherited variation in monoamine neurotransmitter biosynthesis, metabolism, reuptake, storage, receptors or signaling contribute to individual variation in citalopram antidepressant efficacy and/or side effects.

Conditions
Depression
Being tested
citalopram and escitalopram
Keywords
Depression, Antidepressants
Medical subject headings
Depression

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • citalopram and escitalopramDrug

    escitalopram tablets starting at 10 mg, increase to 20 mg at 4 weeks if QIDS-C16 > 5, keep at same dose if QIDS-C16 < 5.

    citalopram tablet or solution starting at 2o mg, increase to 40 mg at 4 weeks if QIDS-C16 > 5, keep at same dose if QIDS-C16 < 5.

Study groups in NCT00613470
Study groupRoleWhat they receive
Citalopram and escitalopramExperimentalCitalopram tablet or solution starting at 20 mg, increase to 40 mg at 4 weeks if QIDS-C16 > 5, keep at same dose if QIDS-C16 < 5. Escitalopram tablets starting at 10 mg, increase to 20 mg at 4 weeks if QIDS-C16 > 5, keep at same dose if QIDS-C16 < 5.
Receives: Drug: citalopram and escitalopram

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. The change in HRS-D17 will constitute the major research outcome measure used to assess drug response phenotype because it is widely used in psychiatric research, making it possible to perform comparisons with other studies.

    Measured: baseline, 4 week and 8 week visits

Secondary outcomes (1)

  1. QIDS-C16 (obtained by the CRC), and the QIDS-SR16

    Measured: week 0, 4, and 8

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted13 Feb 2008 (estimated)
  2. Study startMar 2005
  3. Primary completionMay 2013
  4. Study completionMay 2013

Resources

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 1
Primary purpose
Basic science
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrolment
927 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT00613470
Sponsor's protocol ID
170-05
Other IDs
U01GM061388, UL1RR024150
Acronym
PGRN-SSRI
Status last verified
Dec 2013
First submitted
30 Jan 2008
Last updated
18 Dec 2013
Results posted
No
Data monitoring committee
No

Publications

  • Liu D, Ray B, Neavin DR, Zhang J, Athreya AP, Biernacka JM, Bobo WV, Hall-Flavin DK, Skime MK, Zhu H, Jenkins GD, Batzler A, Kalari KR, Boakye-Agyeman F, Matson WR, Bhasin SS, Mushiroda T, Nakamura Y, Kubo M, Iyer RK, Wang L, Frye MA, Kaddurah-Daouk R, Weinshilboum RM. Beta-defensin 1, aryl hydrocarbon receptor and plasma kynurenine in major depressive disorder: metabolomics-informed genomics. Transl Psychiatry. 2018 Jan 10;8(1):10. doi: 10.1038/s41398-017-0056-8.

    PubMed 29317604

  • Mrazek DA, Biernacka JM, McAlpine DE, Benitez J, Karpyak VM, Williams MD, Hall-Flavin DK, Netzel PJ, Passov V, Rohland BM, Shinozaki G, Hoberg AA, Snyder KA, Drews MS, Skime MK, Sagen JA, Schaid DJ, Weinshilboum R, Katzelnick DJ. Treatment outcomes of depression: the pharmacogenomic research network antidepressant medication pharmacogenomic study. J Clin Psychopharmacol. 2014 Jun;34(3):313-7. doi: 10.1097/JCP.0000000000000099.

    PubMed 24743713

  • Ji Y, Biernacka J, Snyder K, Drews M, Pelleymounter LL, Colby C, Wang L, Mrazek DA, Weinshilboum RM. Catechol O-methyltransferase pharmacogenomics and selective serotonin reuptake inhibitor response. Pharmacogenomics J. 2012 Feb;12(1):78-85. doi: 10.1038/tpj.2010.69. Epub 2010 Sep 28.

    PubMed 20877297

Questions about this trial

What is this clinical trial studying?

A Phase 1 study testing citalopram and escitalopram in people with Depression, run by Mayo Clinic 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 5 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: finished, as of the sponsor's last update on 18 Dec 2013. 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?

Phase 1 studies test a treatment in a small group of people for the first time or in a new way, mainly to check safety and find the right dose.

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?

The change in HRS-D17 will constitute the major research outcome measure used to assess drug response phenotype because it is widely used in psychiatric research, making it possible to perform comparisons with other studies. (time frame: baseline, 4 week and 8 week visits). 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 NCT00613470, which also lists 3 linked publications.

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 18 Dec 2013.

AzTrials uses cookies for analytics and advertising. You can accept or reject them; the site works either way. Privacy Policy.

Free account

Log in to keep searching

You’ve used your 3 free searches. AzTrials is free: log in or create a free account to keep searching clinical trials and save the ones you want to follow.

Create a free accountLog in