Hypogonadism Clinical Trial
Official title:
The Central Nervous System Effects of Pharmacologically Induced Hypogonadotropic Hypogonadism With and Without Testosterone Replacement
There is evidence that suggests male sex hormones (androgens) play a significant role in
brain (central nervous system) functioning. In studies conducted with animals, researchers
have documented that male sex hormones (androgens) are associated with neurotransmitter
(serotonin) function, sexual behavior, aggression, and other non-reproductive behavior.
Similar findings have been seen in studies involving humans.
Androgens are thought to be involved in some neurologic conditions. Tourette's syndrome
which is seen more often in males than females has caused researchers to look more closely
at the effects of androgens on the brain.
This study is designed to examine the effects of testosterone on brain (CNS) activity by
first stopping testosterone release and then replacing it.
Researchers will evaluate mood, behavior, cognitive (mental) function, physiologic response
to serotonergic agonists and regional cerebral blood flow (r-CBF).
This study will attempt to answer the following questions;
1. Is a person's mental functioning a result of being male or female (gender) or a result of
the hormonal condition
3. Does the decrease of blood flow (r-CBF) to specific areas of the brain (prefrontal
cortex) in women whose ovaries are not releasing hormones (hypogonadal state) also occur in
men
4. Will the mental rotation task better identify hormone (gonadal steroid) differences in
r-CBF
5. Do hormones directly influence the responsiveness of the hypothalamic-pituitary-adrenal
(HPA) axis
6. Does the hormonal state of a patient directly affect levels of chemicals and steroids in
the cerebrospinal fluid (CSF).
Several types of evidence suggest that androgens exert clinically significant effects on central nervous system (CNS) function. In animal studies, androgens modulate brain serotonin function, and regulate sexual behavior, aggression, and other non-reproductive behaviors. These actions reflect both organizational and activational effects of androgens. Several studies in humans also support the central modulatory capacity of androgens. Correlative studies have described relationships between plasma androgen levels and sexual interest/behavior and cognitive task performance. Androgens are believed to underlie gender related differences in the prevalence of certain neuropsychiatric disorders, resulting in trials of anti-androgens in at least one of these disorders (Tourette's syndrome). Finally, androgens are believed to possess psychotropic effects in humans, evidenced by purported antidepressant effects and reports of psychotic reactions following administration of androgens. In a recent study, we demonstrated that androgenic/anabolic steroids precipitated mood and behavioral state disturbances when administered in a double-blind, placebo-controlled fashion in normal volunteers. There are remarkably few studies that attempt to identify the CNS effects of androgens or the central systems that may mediate these effects. In this study we propose to examine directly the effects of testosterone on CNS activity by first suppressing and then, in a double-blind, placebo-controlled fashion, replacing physiological levels of testosterone. We will evaluate mood, behavior, cognitive function, physiologic response to serotonergic agonists and cerebral blood flow (separate protocols) during both pharmacologically controlled hormonal conditions: hypogonadism and hypogonadism with testosterone replacement. On the basis of prior findings from our group and from others, we will be asking the following questions: 1) Does cognitive function differ as a function of gender or of hormonal condition; 2) Is the decreased r-CBF that we observed in the prefrontal cortex during the hypogonadal state in women also demonstrable in men; 3) Do measures of hypothalamic-pituitary-adrenal axis responsivity differ as a function of gender or of hormonal condition; and 4) Do CSF neurochemistry and neurosteroid levels differ as a consequence of changing hormonal state. This protocol will not only provide much needed information about the behavioral and physiological effects of androgens but will serve as a companion study for NIMH protocol #92-M-172, "The Central Nervous System Effects of Pharmacologically Induced Hypogonadotropic Hypogonadism with and without Estrogen and Progressive Replacement." ;
N/A
Status | Clinical Trial | Phase | |
---|---|---|---|
Completed |
NCT03126656 -
Effects of Testosterone on Myocardial Repolarization
|
Phase 4 | |
Terminated |
NCT02419105 -
Effects of Transdermal Testosterone and/or Monthly Vitamin D on Fall Risk in Pre--frail Hypogonadal Seniors
|
Phase 3 | |
Withdrawn |
NCT02137265 -
Assessing the Efficacy of Clomiphene Citrate in Patients With Azoospermia and Hypoandrogenism
|
N/A | |
Completed |
NCT02233751 -
Pharmacokinetic Study of Subcutaneous Testosterone Enanthate
|
Phase 1 | |
Completed |
NCT02222558 -
Oral Testosterone for the Treatment of Hypogonadism in Males
|
Phase 2 | |
Completed |
NCT01887418 -
Pharmacokinetic Study of Testosterone Enanthate
|
Phase 1/Phase 2 | |
Terminated |
NCT01092858 -
NEBIDO in Symptomatic Late Onset Hypogonadism (SLOH)
|
Phase 4 | |
Completed |
NCT00624624 -
Follow-up of Serum Androgen Profile After Bariatric Surgery in Men With Obesity Related Hypogonadotropic Hypogonadism
|
N/A | |
Completed |
NCT00752869 -
Efficacy Study for Use of Dutasteride (Avodart) With Testosterone Replacement
|
Phase 4 | |
Completed |
NCT00613288 -
Testosterone and Lipolysis, Insulin Sensitivity and Protein Metabolism
|
N/A | |
Completed |
NCT00119483 -
Older Men and Testosterone
|
N/A | |
Completed |
NCT00838838 -
Efficacy of Nebido on Bone Mineral Density (BMD) in Hypogonadal Paraplegic Patients With Confirmed Osteoporosis
|
N/A | |
Completed |
NCT00004438 -
Leuprolide in Treating Adults With Hypogonadotropism
|
N/A | |
Withdrawn |
NCT00398034 -
Analgesic Efficacy of Testosterone Replacement in Hypogonadal Opioid-treated Chronic Pain Patients: A Pilot Study.
|
Phase 2 | |
Completed |
NCT02921386 -
The Effect of Various Amounts of Fat on PK of Oral Testosterone Undecanoate
|
Phase 2 | |
Completed |
NCT02937740 -
Open-Label Study, Evaluating Patient Satisfaction and Symptom Improvement When Treating Male Hypogonadism With Natestoâ„¢
|
Phase 4 | |
Completed |
NCT01717768 -
Oral Testosterone for the Treatment of Hypogonadism
|
Phase 2 | |
Terminated |
NCT01460654 -
Testosterone and Alendronate in Hypogonadal Men
|
Phase 2 | |
Completed |
NCT00998933 -
Study of Serum Testosterone Levels in Non-dosed Females After Secondary Exposure
|
Phase 1 | |
Withdrawn |
NCT00710827 -
Nebido Versus Placebo in Elderly Men With Typical Symptoms of Late Onset Hypogonadism Over a Period of 54 Weeks
|
Phase 4 |