The physiological rationale for oral insulin administration.

Area of Science:

• Endocrinology
• Pharmacology
• Diabetes Mellitus Management

Background:

• Insulin is a cornerstone therapy for advanced diabetes, yet many patients struggle with sustained glycemic control.
• Current insulin administration via injection has limitations, including patient compliance issues and non-physiological delivery targeting peripheral tissues instead of the liver.
• The pharmacokinetics of parenteral insulin do not mimic endogenous insulin release patterns.

Purpose of the Study:

• To review the physiological basis and potential benefits of oral insulin delivery.
• To highlight the advantages of the portal-hepatic absorption route for oral insulin.
• To discuss oral insulin as an alternative to parenteral administration in diabetes management.

Main Methods:

• Review of physiological principles governing insulin absorption and delivery.
• Analysis of existing clinical data on alternative insulin administration routes.
• Discussion of the portal-hepatic circulation in the context of oral drug delivery.

Main Results:

• Parenteral insulin administration bypasses the liver, leading to suboptimal pharmacokinetics.
• Oral insulin delivery utilizes the portal-hepatic system, mimicking natural insulin absorption.
• This route has the potential to improve insulin's efficacy and patient adherence.

Conclusions:

• Oral insulin administration represents a significant advancement in diabetes treatment.
• The portal-hepatic route offers a more physiological approach to insulin delivery compared to injections.
• Further development of oral insulin formulations is crucial for overcoming current treatment challenges.