The ghrelin and leptin responses to short-term starvation vs a carbohydrate-free diet in men with type 2 diabetes; A controlled, cross-over design study

frank q Nuttall, Rami Mahmoud Almokayyad, Mary C Gannon

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Background: We recently have reported the 24-hour glucose, insulin and glucagon responses to a 72-hour fast compared to a 72-hour macronutrient-sufficient, carbohydrate-free diet in men with type 2 diabetes. The 72-hour time period was used because it is the time required for the major metabolic adjustments to a lack of food to be instituted. As part of that study, ghrelin and leptin responses were monitored. Methods: Twenty-four-hour total ghrelin and overnight fasting leptin concentrations were determined in males with type 2 diabetes when ingesting a standard, mixed meal diet (control), followed by a carbohydrate-free diet for 72 h or were starved for 72 h, using a crossover design. Results: A rise in ghrelin concentration before and a decrease after meals was present when the standard diet was ingested. However, in contrast to literature reports in normal subjects, a circadian variation was not apparent. Meal related changes were absent with starvation. A carbohydrate-free diet resulted in a daylong decrease in ghrelin. It also resulted in a 19 % decrease in the overnight fasting leptin concentration. Leptin was decreased 54 % with total starvation. Conclusion: Ingestion of a typical mixed-meal diet results in meal-related changes in ghrelin similar to those reported in normal subjects, although the circadian rhythm was not apparent. Except for the lack of meal-related changes, starvation did not change the concentration. A carbohydrate-free, high fat diet resulted in a daylong suppression of ghrelin. The leptin concentration was decreased by both the carbohydrate-free diet and starvation. Trial registration: ClinicalTrials.gov Identifier: NCT01469104.

Original languageEnglish (US)
Article number47
JournalNutrition and Metabolism
Volume13
Issue number1
DOIs
StatePublished - Jul 22 2016

Bibliographical note

Publisher Copyright:
© 2016 The Author(s).

Keywords

  • 24-hour profile
  • Carbohydrate-free diet
  • Dietary carbohydrates
  • Dietary fats
  • Ghrelin
  • Leptin
  • Type 2 diabetes

Fingerprint Dive into the research topics of 'The ghrelin and leptin responses to short-term starvation vs a carbohydrate-free diet in men with type 2 diabetes; A controlled, cross-over design study'. Together they form a unique fingerprint.

Cite this