Effects of Age and Obesity on Brain Insulin Sensitivity

  • STATUS
    Recruiting
  • participants needed
    40
  • sponsor
    University Hospital Tuebingen
Updated on 5 August 2020
glycosylated hemoglobin
hba1c
insulin sensitivity
MRI
chronic disease
functional mri
insulin resistance
dementia
hemoglobin a1c
oral glucose tolerance test
glucose tolerance test
tolerance test
diabetes
type 2 diabetes mellitus
insulin

Summary

Obesity and especially type 2 diabetes (T2D) increases the risk of neurocognitive dysfunctions including adverse effects on brain structure and function. Recent evidence from clinical studies have shown that T2D almost doubles the risk for dementia. As the population gets older, age-related chronic diseases, as T2D, become more prevalent. Scientific evidence is emerging that there are several links between metabolic and neurocognitive functions. Impaired insulin action (i.e. insulin resistance), the main hallmark of T2D, has been suggested as a likely shared common pathophysiological mechanism. However, the neural processes that determine how insulin resistance is are connected to the onset and progression of T2D and dementia remain unclear. In this context, the overall aim is to study brain insulin resistance to disentangle age-related and obesity related brain insulin resistance in healthy normal and overweight/obese persons at the age of 20 to 70 years . To this end, the investigators will assess brain insulin action using intranasal insulin/placebo during functional Magnetic Resonance Imaging (fMRI). Additionally, structural changes and cognitive processes will be assessed as secondary variables.

Details
Condition Insulin Resistance, Obesity, Obesity
Age 20years - 70years
Treatment Placebo, Human nasal insulin
Clinical Study IdentifierNCT04372849
SponsorUniversity Hospital Tuebingen
Last Modified on5 August 2020

Eligibility

Yes No Not Sure

Inclusion Criteria

Body-Mass Index (BMI) between 19-35 kg/m2
HbA1c 6.0%
normal glucose tolerance during 75g oral glucose tolerance test (OGTT)

Exclusion Criteria

Not removable metal parts in or on the body
manifest cardiovascular disease
claustrophobia
recent surgery (less than 3 months)
Simultaneous participation in other studies
Acute disease or infection within the last 4 weeks
neurological and psychiatric disorders
treatment with centrally acting drugs
hemoglobin Hb <13g / dl
Hypersensitivity to any of the substances used
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