Ignite Creation Date:
2025-12-24 @ 1:21 PM
Ignite Modification Date:
2025-12-30 @ 5:56 PM
Study NCT ID:
NCT06470295
Status:
RECRUITING
Last Update Posted:
2025-08-21
First Post:
2024-06-17
Is NOT Gene Therapy:
True
Has Adverse Events:
False
Brief Title:
Effect of C-peptide on Hypoglycemic Counterregulation
Sponsor:
University of Cincinnati
Organization:
Study Overview
Official Title:
On the Regulation of Hepatic Glucose Metabolism During Insulin-induced Hypoglycemia
Status:
RECRUITING
Status Verified Date:
2025-08
Last Known Status:
None
Delayed Posting:
No
If Stopped, Why?:
Not Stopped
Has Expanded Access:
False
If Expanded Access, NCT#:
N/A
Has Expanded Access, NCT# Status:
N/A
Acronym:
None
Brief Summary:
Iatrogenic hypoglycemia is the most prominent barrier to the safe, effective management of blood sugar in people with type 1 diabetes due to periodic over-insulinization. During insulin-induced hypoglycemia, glucagon secretion is diminished in type 1 diabetes which, in turn, reduces hepatic glucose production and increases the depth and duration of hypoglycemic episodes. We have observed that the naturally occurring protein C-peptide increases glucagon secretion in dogs during insulin-induced hypoglycemia, which increases hepatic glucose production; the experiments in this application will shed light on the translation of this finding to the human.
Detailed Description:
Iatrogenic hypoglycemia is recognized as a primary barrier to the safe, effective management of blood glucose in people with type 1 diabetes (T1D). In previous experiments in the dog, we observed that C-peptide infusion augmented glucagon secretion and hepatic glucose production during insulin-induced hypoglycemia. The proposed experiments will determine the translational impact of this finding in patients with and without T1D.
Specific Aim #1 is to determine, in healthy control subjects, the effect of C-peptide co-infusion with insulin on endogenous glucose production (EGP) and counterregulatory hormone levels during hypoglycemia. This will be addressed by studying a single group of healthy subjects two times. In both studies, hypoglycemia will be induced with an intravenous (IV) infusion of insulin. During one study, C-peptide will be infused during the hypoglycemic period, and in the other study, saline will be infused. EGP is our primary variable, with secondary analyses including counterregulatory hormones and metabolic substrates.
Specific Aim #2 is to determine, in T1D patients, the effect of C-peptide co-infusion with insulin on EGP and counterregulatory hormone levels during hypoglycemia. The research plan for this Aim is very similar to that of Aim #1, with the main exception being that we will study T1D patients instead of healthy controls (e.g., two hypoglycemic clamp studies where C-peptide is administered during one study and saline during the other). In addition, the glycemic levels of these T1D patients will be monitored for 10 days prior to this visit to ensure that they do not experience hypoglycemia which could confound the data for the metabolic studies. Similar to Aim #1, EGP is our primary outcome variable, with secondary analyses including hormone and substrate levels.
Specific Aim #1 is to determine, in healthy control subjects, the effect of C-peptide co-infusion with insulin on endogenous glucose production (EGP) and counterregulatory hormone levels during hypoglycemia. This will be addressed by studying a single group of healthy subjects two times. In both studies, hypoglycemia will be induced with an intravenous (IV) infusion of insulin. During one study, C-peptide will be infused during the hypoglycemic period, and in the other study, saline will be infused. EGP is our primary variable, with secondary analyses including counterregulatory hormones and metabolic substrates.
Specific Aim #2 is to determine, in T1D patients, the effect of C-peptide co-infusion with insulin on EGP and counterregulatory hormone levels during hypoglycemia. The research plan for this Aim is very similar to that of Aim #1, with the main exception being that we will study T1D patients instead of healthy controls (e.g., two hypoglycemic clamp studies where C-peptide is administered during one study and saline during the other). In addition, the glycemic levels of these T1D patients will be monitored for 10 days prior to this visit to ensure that they do not experience hypoglycemia which could confound the data for the metabolic studies. Similar to Aim #1, EGP is our primary outcome variable, with secondary analyses including hormone and substrate levels.
Study Oversight
Has Oversight DMC:
False
Is a FDA Regulated Drug?:
True
Is a FDA Regulated Device?:
False
Is an Unapproved Device?:
None
Is a PPSD?:
None
Is a US Export?:
False
Is an FDA AA801 Violation?: