Tests GnRH therapy on thinking skills in people with Down syndrome
Tests pulsed GnRH, a hormone, against a saline dummy in people with Down syndrome.
Plain-language title generated from the registry record
Registry title: GnRH Therapy on Cognition in Down Syndrome
Key facts
- Where
- Lausanne, SwitzerlandSee the site
- Phase
- Phase 2/3
Could this be for you?
Answer for yourself. This is not a decision: only the study team can say whether you can take part.
- Are you between 16 and 50 years old?
Source: NCT04390646, who can take part
Where in Switzerland
- Centre Hospitalier Universitaire Vaudois (CHUV)Lausanne, SwitzerlandTaking people
Questions to ask the study team
- How often do I need to come in, and for how long each time?
- Are travel costs paid?
- Can I keep my own doctor?
- What happens if I want to stop?
Trial details
- Who runs it
- Nelly Pitteloud
- Trial code
- NCT04390646
- Record updated
- 12 February 2024
- Original description
Down syndrome (DS) is the most common chromosomal disorder; with the increasing life expectancy, about 80% of DS adults reach age 65 years old. Early Alzheimer's disease (AD) is the most common cause of death within this population. DS individuals already show AD neuropathology by the age of 30, while it becomes clinically recognized in their late forties. DS subjects also exhibit olfaction defects in adulthood.Read full original descriptionShow less
Effect of Pulsatile GnRH Therapy on Cognition in Down Syndrome: Randomized Placebo Control Study
Down syndrome (DS) is the most common chromosomal disorder; with the increasing life expectancy, about 80% of DS adults reach age 65 years old. Early Alzheimer's disease (AD) is the most common cause of death within this population. DS individuals already show AD neuropathology by the age of 30, while it becomes clinically recognized in their late forties. DS subjects also exhibit olfaction defects in adulthood.
To date, there is no treatment available for the cognitive or olfactory defects in DS. The development of an effective treatment targeting cognitive dysfunction in DS adolescents/adults would be warranted.
GnRH, a decapeptide secreted by hypothalamic neurons is the pilot light of reproduction in all mammals. Pulsatile GnRH acts on the gonadotrophs via the GnRH receptor (GNRHR) in the pituitary gland to stimulate LH and FSH, which themselves will act on the gonads to produce gametes and steroids. However, GNRHR are also expressed in cerebral cortex, hippocampus, amygdala, habenula, olfactory structures, and adrenal gland, suggesting that GnRH may have a role beyond reproduction.
Recently, GnRH has been shown to be involved in the process of ageing and lifespan control. Notably, in murine models, GnRH acts as an anti-ageing factor, independent of sex hormones. While ageing is characterized by hypothalamic inflammation and diminished neurogenesis, particularly in the hypothalamus and the hippocampus, GnRH was able to promote adult neurogenesis.
The regulation of GnRH secretion is complex and involves hormonal, neuronal input, and environmental factors.
Prévot et al. recently explored cognition within the Ts65Dn model and showed an age-dependent loss of the ability to recognize new objects. Also, these mice exhibit defects in olfaction. Given the role of GnRH in anti-aging mice model, pulsatile GnRH or continuous GnRH infusion (leading to desensitization of the GNRHR) were given to the Ts65Dn mice for two weeks. Amazingly, pulsatile but not continuous GnRH therapy was able to recover cognitive and olfaction defects.
Inclusion: Diagnosis of trisomy 21; Verbal expression (ability to follow the procedures of the study); Consent to a non-hormonal contraception during the whole duration of the study For women: intra-uterine device with copper, a prior tubal ligation or condoms for the partner For men: condoms or vasectomy.
Exclusion: Chronic alcohol abuse, illicit drug use, anabolic steroid abuse, psychotropic drugs reported by caregivers; Taking medication that modifies hormones: spironolactone, ketoconazole, anticoagulants, corticosteroids, ACTH hormone, psychotropics, including antidepressants, antipsychotics and anticonvulsants; Acute illness (clinical or biochemical findings suggesting acute illness/hospitalization); Females: ovarian cysts, non-hypothalamic anovulation (i.e. polycystic ovary syndrome), pregnancy or lactation; Known pituitary adenoma and other hormone-dependent tumours; Participation in another clinical study; Intention to become a parent during the course of the study; Males: hematocrit > 54%; Contraindications for MRI (e.g. pacemaker, metal clips,etc); Participant or his/her legal representative do not want to be informed in case of incidental findings.