NCT01939782

Metabolic Clock Genes During Fasting and After Food Intake in Type 2 Diabetics

Metabolic Clock Gene Expression in Peripheral Blood Cells During Fasting and After Food Intake in the Breakfast in Type 2 Diabetic Patients

• Status: Unknown
• Phase: N/A
• Study type: Interventional
• Enrollment: 30 (estimated)
• Sponsor: Tel Aviv University · Academic / Other
• Sex: All
• Age: 26 Years – 65 Years
• Healthy volunteers: Accepted

Summary

This study is undertaken to explore whether compared to extension of overnight fast until lunch versus the breakfast consumption influence the oscillation of the metabolic clock gene expression in peripheral blood cells (PBC), at noon and after isocaloric lunch in type 2 diabetic patients.

Detailed description

Most of our metabolic function is controlled by metabolic clock genes that regulate glucose, lipid metabolism and several other circadian metabolic pathways involved in insulin resistance obesity and type 2 diabetes. The main group of clock genes resides in the SCN nuclei and is synchronized by light/dark signals. However similar clock oscillators called peripheral clocks are found in almost all tissues, including in the liver, heart, kidney, intestine, skeletal muscles, and adipocytes and in peripheral blood cells (PBC). The peripheral clocks, and specially those metabolic clock genes, seem to be controlled mainly by food cues. The time of food intake synchronize simultaneously and in parallel way almost all the peripheral metabolic clock genes including those expressed and in peripheral blood cells (PBC) i.e. leucocytes, monocytes; allowing to explore the oscillation of the metabolic clock gene expression of the whole body by assessing its expression in the PBC. Impaired oscillation of the metabolic clock gene mRNA expression was found in diabetic animal models and in patients with type 2 diabetes and were inversely correlated with HbA1c. In support of these finding we reported that high calorie breakfast with reduced dinner improved insulin sensitivity and weight loss rate among obese subjects, while in type 2 diabetic patients the high calorie breakfast was associated with improvement of HbA1c. Moreover, recently was shown that very short time (only 120 min) after food intake in the breakfast, was sufficient to reset the expression of the circadian clock genes. This study is undertaken to explore whether compared to extension of overnight fast until lunch versus the breakfast consumption influence the oscillation of the metabolic clock gene expression in peripheral blood cells (PBC), at noon and after isocaloric lunch in type 2 diabetic patients.

Conditions

• Type 2 Diabetes

Interventions

Type	Name	Description
OTHER	No Breakfast (NoB)	In both occasions the blood samples for glucose and insulin, cortisol triglycerides and intact GLP-1 will be taken after overnight fast at 8:30 and thenat 8:30, 9:00, 10:30, 12:00, 12:30, 14:00 and 15:30. The samples for clock genes and for DPP4 plasma activity will be taken at 8:30, 12:00 (before lunch) and at 15:30 (3 1/2 h after lunch).
OTHER	Yes Breakfast (YesB)	In both occasions the blood samples for glucose and insulin, cortisol, triglycerides and intact GLP-1 will be taken after overnight fast at 8:30 and then at 8:30, 9:00, 10:30, 12:00, 12:30, 14:00 and 15:30. The samples for clock genes and for DPP4 plasma activity will be taken at 8:30, 12:00 (before lunch) and at 15:30 (3 1/2 h after lunch).

Timeline

• Start date: 2015-02-01
• Primary completion: 2015-09-01
• Completion: 2015-11-01
• First posted: 2013-09-11
• Last updated: 2015-04-22

Locations

1 site across 1 country: Israel