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Insulin: Dosing Regimen and Adverse Effects01:16

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Insulin-replacement therapy usually includes both long-acting insulin (basal) and short-acting insulin (to cater to postprandial needs). In a diverse group of type 1 diabetes patients, the average daily insulin dose is typically 0.5-0.7 units/kg body weight. However, obese patients and pubertal adolescents may need more due to insulin resistance.
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Insulin action is mediated through a receptor tyrosine kinase, akin to the IGF-1 receptor. The number of receptors per cell varies significantly, from 40 on erythrocytes to 300,000 on adipocytes and hepatocytes. The insulin receptor consists of linked α/β subunit dimers, forming a heterotetramer glycoprotein with two extracellular α subunits and two β subunits spanning the membrane. The α subunits inhibit the inherent tyrosine kinase activity of the β subunits, but...
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The pancreatic islets comprising only 1%-2% of the volume are highly vascularized and innervated mini-organs. They contain five endocrine cell types, including β cells that secrete insulin, which is synthesized as a single polypeptide chain, preproinsulin, processed to proinsulin, and finally to insulin and C-peptide. This process is complex and regulated, involving the Golgi complex, the endoplasmic reticulum, and the secretory granules of the β cell.
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Hormones Regulating Blood Glucose01:16

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Insulin is released by beta cells of the pancreas when blood glucose levels are high. It facilitates glucose absorption and utilization in insulin-dependent cells with insulin receptors on their plasma membranes. Insulin promotes glucose uptake by increasing the number of glucose transport proteins in the cell membrane, allowing glucose to enter the cell. As a result, glucose utilization and ATP production are enhanced.
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Carbohydrates are polymers composed of molecules containing atoms of carbon, hydrogen and oxygen. One gram of carbohydrate can provide four kilo-calories of energy, which makes it the most efficient instant energy source.
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Insulin: Biosynthesis, Chemistry, and Preparation01:25

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The endoplasmic reticulum (ER) of pancreatic β-cells synthesizes preproinsulin, which consists of a signal peptide, A and B chains, and a C-peptide. Preproinsulin is then cleaved and folded into proinsulin, which translocates to the Golgi apparatus for sorting and packaging into secretory granules. In these granules, enzymatic clipping generates insulin and C-peptide.
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Study of In Vivo Glucose Metabolism in High-fat Diet-fed Mice Using Oral Glucose Tolerance Test OGTT and Insulin Tolerance Test ITT
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Evolution and Revolution-Our Changing Relationship With Insulin.

John Anderson1, Mary Van Doorn2, Jodi Strong3

  • 1The Frist Clinic, Nashville, TN.

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PubMed
Summary
This summary is machine-generated.

Type 2 diabetes management requires timely insulin therapy initiation. Addressing patient and provider barriers through shared decision-making and early conversations improves glycemic control and reduces complications.

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Area of Science:

  • Endocrinology
  • Metabolic Diseases
  • Pharmacology

Background:

  • Type 2 diabetes is a progressive condition with significant beta cell loss at diagnosis.
  • Maintaining glycemic control often necessitates additional therapies over time.
  • Delayed insulin therapy initiation increases risks of diabetes-related complications.

Purpose of the Study:

  • To review perspectives on insulin therapy initiation in type 2 diabetes.
  • To compare longer-acting basal insulin analogs with older long-acting analogs.
  • To emphasize strategies for timely basal insulin initiation.

Main Methods:

  • Roundtable discussion format.
  • Review of patient and healthcare provider views on insulin initiation.
  • Discussion of basal insulin analog benefits.

Main Results:

  • Barriers to insulin initiation are multifactorial, leading to treatment delays.
  • Early and positive communication is crucial for successful insulin adoption.
  • Shared decision-making and multidisciplinary team involvement facilitate timely initiation.

Conclusions:

  • Optimizing insulin therapy requires addressing barriers to initiation.
  • Basal insulin analogs offer benefits for managing type 2 diabetes.
  • Proactive, collaborative approaches improve patient outcomes in type 2 diabetes management.