Hippocampal Neurogenesis in Human Subjects

Completed

• Conditions: Hippocampal Neurogenesis in Cocaine Addiction

• Registration Number: NCT02028273
• Lead Sponsor: University of Texas Southwestern Medical Center

Brief Summary

This study is being done to measure the number of brain cells that grow in the brain throughout our lives while determining an effective way to complete this with an MRI (Magnetic Resonance Imaging) scanner. The number of these brain cells may be affected by cocaine use. Researchers are trying to understand the long-term effects of cocaine use on the brain.

Detailed Description

New neurons are generated through the process of neurogenesis. Although most active during pre-natal development, neurogenesis persists throughout the human lifespan. In adulthood, neurogenesis occurs predominantly in the subgranular zone of the hippocampal dentate gyrus. A highly novel methodology using Magnetic Resonance Spectroscopy (MRS) has recently been developed to measure the formation of hippocampal newborn stem cells in the human brain. We propose to assess Neural Progenitor Cells (NPCs) in the neuropsychiatric disorder cocaine dependence, a chronic disease process associated with pathology of the hippocampus and impaired neurogenesis. In addition, we will assess other measures associated with neurogenesis, including hippocampal (dentate gyrus) cerebral blood volume (CBV) using Vascular-Space-Occupancy (VASO) Magnetic Resonance Imaging. We predict that newborn hippocampal cells \[or neuronal progenitor cells (NPCs\] will be attenuated in recently using cocaine-addicted participants relative to abstinent and control participants, and that these changes will be paralleled by changes in CBV. In this pilot study, we will assess for these changes in cocaine-addicted subjects who are actively using cocaine and those who are recently abstinent (three to six months) as well as age-, race-, and gender-similar control participants.

Basic Information
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Recruitment & Eligibility
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Study & Design
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Trial Locations

Study Timeline

• Study Start: 2012-05
• Study First Submitted: 2013-01-03
• Study First Submitted QC: 2014-01-03
• Study First Posted: 2014-01-07
• Primary Completion: 2018-01
• Study Completion: 2018-01
• Status Verified: 2019-09
• Last Update Submitted: 2019-09-06
• Last Update Posted: 2019-09-09

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 14

Inclusion Criteria

• Cocaine-dependence (patient population) or no cocaine-dependence (control population)

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Exclusion Criteria

• Other medical or psychiatric disorders that may effect neural functioning
• Medications that may effect neural functioning

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Study & Design

• Study Type: OBSERVATIONAL
• Study Design: Not specified

Primary Outcome Measures

Name	Time	Method
Assess Neural Progenitor Cells	within 3 weeks of screening physical	A 1 hour Magnetic Resonance Spectroscopy to determine the presence of newborn hippocampal neurons in using and abstinent cocaine addicts

Secondary Outcome Measures

Name	Time	Method
Hippocampal cerebral blood volume	within 3 weeks of screening physical	Measure cerebral blood flow during an hour long Vascular-Space-Occupancy (VASO) Magnetic Resonance Imaging to assess production of hippocampal cells

Trial Locations

Locations (1)

UT Southwestern Medical Center at Dallas, Division on Addictions; 🇺🇸 Dallas, Texas, United States