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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.
The basal dose constitutes about 40%-50% of the total daily dose, with the rest as premeal insulin. The mealtime insulin dose should mirror...
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Insulin Formulations: Types and Delivery01:27

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Insulin preparations are categorized by their duration of action into short-acting and long-acting types. Two strategies are used to modify insulin's absorption and pharmacokinetic profile: slowing the absorption post-subcutaneous injection, or altering human insulin's amino acid sequence or protein structure. These changes retain the insulin's ability to bind to the insulin receptor, but alter its behavior in solution or after injection.
Short-acting insulins are divided into...
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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.
Damage or functional impairment of β-cells inhibits insulin production, leading to diabetes. Diabetes treatment...
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Glucose Homeostasis: Pancreatic Islets and Insulin Secretion01:27

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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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Oral Hypoglycemic Agents: Glinides01:06

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Repaglinide (Prandin) and Nateglinide (Starlix), known as glinides, are oral insulin secretagogues that stimulate insulin release from pancreatic β cells by closing the ATP-sensitive potassium channels (KATP channel). Repaglinide controls insulin release from pancreatic β cells by managing potassium efflux. It shares two binding sites with sulfonylureas and also has a unique site, indicating overlapping mechanisms of action. With a rapid onset and a 4-7 hour duration, it effectively...
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Production of Pharmaceuticals01:30

Production of Pharmaceuticals

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Industrial insulin production uses genetically engineered E. coli expressing a proinsulin gene controlled by a tryptophan promoter and containing a methionine linker for later cleavage. The cells also carry ampicillin resistance for selective growth. Seed cultures are stored at −80 °C and production begins by thawing a small amount to inoculate starter cultures, which are progressively scaled to a 50,000-L bioreactor. In the bioreactor, E. coli grow in nutrient-rich media under...
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Related Experiment Video

Updated: Mar 26, 2026

Improving IV Insulin Administration in a Community Hospital
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Incorrect Insulin Administration: A Problem That Warrants Attention.

Paula M Trief1, Donald Cibula2, Elaine Rodriguez3

  • 1Department of Psychiatry and Behavioral Sciences, State University of New York (SUNY) Upstate Medical University, Syracuse, NY.

Clinical Diabetes : a Publication of the American Diabetes Association
|January 26, 2016
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Summary

Many adults with diabetes make common errors when administering insulin, impacting blood glucose control. Proper insulin timing and dose confidence, not just injection skills, are key to managing diabetes effectively.

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Area of Science:

  • Endocrinology
  • Diabetes Management
  • Patient Education

Background:

  • Improper insulin administration can lead to severe health complications like hypoglycemia, hyperglycemia, and diabetic ketoacidosis.
  • Accurate insulin self-management is crucial for maintaining optimal glycemic control in individuals with diabetes.

Purpose of the Study:

  • To systematically evaluate the insulin-related knowledge and injection techniques of adult patients with diabetes.
  • To identify common errors in insulin self-administration and their correlation with glycemic control.

Main Methods:

  • A systematic assessment of insulin knowledge and injection skills was conducted on a sample of adult patients with diabetes.
  • Data analysis focused on identifying errors in insulin dose selection, timing, injection site, and numeracy.
  • Correlation between self-administration skills, knowledge, and clinical outcomes (A1C, blood glucose levels) was examined.

Main Results:

  • Errors in self-administering insulin, including incorrect dosing, were frequently observed in the study sample.
  • Challenges were noted in injection site selection and diabetes-related numeracy among participants.
  • Higher confidence in dose selection and correct injection timing were associated with improved A1C and blood glucose levels, whereas overall skill scores did not show a significant correlation.

Conclusions:

  • Insulin administration errors are prevalent among adults with diabetes and can negatively affect glycemic control.
  • Focusing on improving insulin dose confidence and injection timing may be more impactful than solely enhancing technical injection skills for better diabetes management.
  • Enhanced patient education addressing numeracy and proper insulin dosing strategies is warranted to reduce administration errors and improve patient outcomes.