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Effect of High Caloric Diet on Brain Insulin Sensitivity and Inflammation

19. maj 2020 opdateret af: University Hospital Tuebingen

Einfluss Von Hochkalorischer Nahrungsaufnahme Auf Die Insulinsensitivität Des Menschlichen Zentralnervensystems

Obesity if known to be associated with brain insulin resistance in humans and evidence is rapidly accumulating that brain insulin resistance influences peripheral metabolism, eating behavior and cognition. A reduced insulin response in the brain is found mainly in people with a metabolically unfavorable fat distribution - high visceral fat. Visceral fat produces inflammatory mediators and elevated inflammatory levels are closely linked to insulin resistance. Inflammation of the brain (i.e., neuroinflammation) has been proposed as a possible cause of brain insulin resistance. Interestingly, rodent models of a high calorie diet show that these inflammatory mechanisms occur rapidly in the brain, even prior to weight gain of the animals. Among other things, it has been shown in humans that a short-term increase in calories, especially carbohydrates and fats, reduces insulin sensitivity in the body and increases inflammatory parameters in the blood. Whether a high-calorie diet triggers insulin resistance or inflammation in the human brain is currently unknown.

Aim of study:

The aim of the study is to investigate the effects of a five-day high calorie diet in healthy young male volunteers on peripheral and brain insulin sensitivity as well as on eating behavior, mood and cognition. Brain insulin sensitivity, peripheral metabolism and different behavioral assessments will be evaluated before, 1 week and 2 weeks after high caloric diet.

Studieoversigt

Status

Afsluttet

Betingelser

Intervention / Behandling

Undersøgelsestype

Interventionel

Tilmelding (Faktiske)

32

Fase

  • Ikke anvendelig

Kontakter og lokationer

Dette afsnit indeholder kontaktoplysninger for dem, der udfører undersøgelsen, og oplysninger om, hvor denne undersøgelse udføres.

Studiesteder

  • Tyskland
      • Tübingen, Tyskland, 72076
        • University of Tuebingen, Department of Internal Medicine IV

Deltagelseskriterier

Forskere leder efter personer, der passer til en bestemt beskrivelse, kaldet berettigelseskriterier. Nogle eksempler på disse kriterier er en persons generelle helbredstilstand eller tidligere behandlinger.

Berettigelseskriterier

Aldre berettiget til at studere

18 år til 29 år (Voksen)

Tager imod sunde frivillige

Ja

Køn, der er berettiget til at studere

Han

Beskrivelse

Inclusion Criteria:

  • BMI 19-24 kg/m2

    • Non smoking
    • normal glucose tolerance during 75g oral glucose tolerance test (OGTT)
    • Exercise less than 2h per week

Exclusion Criteria:

  • Vegetarians and Vegans
  • Food allergies
  • Working at night
  • Professional Athletes
  • 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

Studieplan

Dette afsnit indeholder detaljer om studieplanen, herunder hvordan undersøgelsen er designet, og hvad undersøgelsen måler.

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

  • Primært formål: Grundvidenskab
  • Tildeling: Ikke-randomiseret
  • Interventionel model: Sekventiel tildeling
  • Maskning: Ingen (Åben etiket)

Våben og indgreb

Deltagergruppe / Arm
Intervention / Behandling
Eksperimentel: High caloric diet
Participants will eat 1500 kcal more than their usual diet for five days.
Andet: High caloric diet
After dietary counseling, subjects will receive high caloric snacks for five days.
Ingen indgriben: Control diet
Participants will eat regular diet.

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Change in brain insulin sensitivity
Tidsramme: Outcome measurements will be assessed at baseline (t0). Then, the 5-day high caloric diet or control dietwill start 5 to 30 days after t0. Outcome measurements will again be assessed on the 6th-7th day and on the 10th-15th day after start of diet.
fMRI measurement will be performed before and after administration of 160 U of human insulin as nasal spray. Changes in regional activity will be quantified to assess regional brain insulin sensitivity.
Outcome measurements will be assessed at baseline (t0). Then, the 5-day high caloric diet or control dietwill start 5 to 30 days after t0. Outcome measurements will again be assessed on the 6th-7th day and on the 10th-15th day after start of diet.
Change in quantitative proton density
Tidsramme: Outcome measurements will be assessed at baseline (t0). Then, the 5-day high caloric diet or control dietwill start 5 to 30 days after t0. Outcome measurements will again be assessed on the 6th-7th day and on the 10th-15th day after start of diet.
The inflammatory processes in the brain will be measured through the quantification of the water content by means of proton density imaging.
Outcome measurements will be assessed at baseline (t0). Then, the 5-day high caloric diet or control dietwill start 5 to 30 days after t0. Outcome measurements will again be assessed on the 6th-7th day and on the 10th-15th day after start of diet.
Change in brain metabolites
Tidsramme: Outcome measurements will be assessed at baseline (t0). Then, the 5-day high caloric diet or control dietwill start 5 to 30 days after t0. Outcome measurements will again be assessed on the 6th-7th day and on the 10th-15th day after start of diet.
The inflammatory processes in the brain will be measured through the determination of brain metabolites by MR spectroscopy
Outcome measurements will be assessed at baseline (t0). Then, the 5-day high caloric diet or control dietwill start 5 to 30 days after t0. Outcome measurements will again be assessed on the 6th-7th day and on the 10th-15th day after start of diet.

Sekundære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Change in whole-body insulin sensitivity
Tidsramme: Outcome measurements will be assessed at baseline (t0). Then, the 5-day high caloric diet or control diet will start 5 to 30 days after t0. Outcome measurements will again be assessed on the 6th-7th day and on the 10th-15th day after start of diet.
Insulin sensitivity will be estimated from a frequent-sampling 75 g oral glucose tolerance test using the Matsuda formula.
Outcome measurements will be assessed at baseline (t0). Then, the 5-day high caloric diet or control diet will start 5 to 30 days after t0. Outcome measurements will again be assessed on the 6th-7th day and on the 10th-15th day after start of diet.
Change in body fat distribution
Tidsramme: Outcome measurements will be assessed at baseline (t0). Then, the 5-day high caloric diet or control dietwill start 5 to 30 days after t0. Outcome measurements will again be assessed on the 6th-7th day and on the 10th-15th day after start of diet.
Body composition will be addressed by whole-body MRI and liver MRS.
Outcome measurements will be assessed at baseline (t0). Then, the 5-day high caloric diet or control dietwill start 5 to 30 days after t0. Outcome measurements will again be assessed on the 6th-7th day and on the 10th-15th day after start of diet.
Behavioral assessment
Tidsramme: Outcome measurements will be assessed at baseline (t0). Then, the 5-day high caloric diet or control dietwill start 5 to 30 days after t0. Outcome measurements will again be assessed on the 6th-7th day and on the 10th-15th day after start of diet.
Memory function, food reward behavior and mood will be assessed by questionnaires, neuropsychological testing and a snack test.
Outcome measurements will be assessed at baseline (t0). Then, the 5-day high caloric diet or control dietwill start 5 to 30 days after t0. Outcome measurements will again be assessed on the 6th-7th day and on the 10th-15th day after start of diet.
Change in insulin secretion
Tidsramme: Outcome measurements will be assessed at baseline (t0). Then, the 5-day high caloric diet or control dietwill start 5 to 30 days after t0. Outcome measurements will again be assessed on the 6th-7th day and on the 10th-15th day after start of diet.
Insulin secretion will be estimated from a frequent-sampling 75 g oral glucose tolerance test.
Outcome measurements will be assessed at baseline (t0). Then, the 5-day high caloric diet or control dietwill start 5 to 30 days after t0. Outcome measurements will again be assessed on the 6th-7th day and on the 10th-15th day after start of diet.

Samarbejdspartnere og efterforskere

Det er her, du vil finde personer og organisationer, der er involveret i denne undersøgelse.

Sponsor

University Hospital Tuebingen

Datoer for undersøgelser

Disse datoer sporer fremskridtene for indsendelser af undersøgelsesrekord og resumeresultater til ClinicalTrials.gov. Studieregistreringer og rapporterede resultater gennemgås af National Library of Medicine (NLM) for at sikre, at de opfylder specifikke kvalitetskontrolstandarder, før de offentliggøres på den offentlige hjemmeside.

Studer store datoer

Studiestart (Faktiske)

13. juni 2018

Primær færdiggørelse (Faktiske)

10. marts 2020

Studieafslutning (Faktiske)

10. marts 2020

Datoer for studieregistrering

Først indsendt

14. juni 2018

Først indsendt, der opfyldte QC-kriterier

5. juli 2018

Først opslået (Faktiske)

18. juli 2018

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

20. maj 2020

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

19. maj 2020

Sidst verificeret

1. maj 2020

Mere information

Begreber relateret til denne undersøgelse

Yderligere relevante MeSH-vilkår

Andre undersøgelses-id-numre

  • 813/2017BO2

Plan for individuelle deltagerdata (IPD)

Planlægger du at dele individuelle deltagerdata (IPD)?

INGEN

IPD-planbeskrivelse

We will not able to share individual participant data due to data protection restraints.

Lægemiddel- og udstyrsoplysninger, undersøgelsesdokumenter

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