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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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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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Diabetic Foot Ulcer01:31

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Definition A diabetic foot ulcer (DFU) is a chronic, non-healing wound that develops in individuals with diabetes. It typically occurs on pressure-bearing areas such as the heel, metatarsal heads, or hallux, and carries a high risk of infection and amputation.Pathophysiology • The development of DFUs can be explained by four interconnected mechanisms: neuropathy, ischemia, infection, and impaired wound healing. • Neuropathy is the most common factor. Sensory...
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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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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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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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A Protocol for Constructing a Rat Wound Model of Type 1 Diabetes
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Insulin and wound healing.

Michael Hrynyk1, Ronald J Neufeld1

  • 1Department of Chemical Engineering, Queen's University, Kingston, Ontario, Canada K7L 3N6.

Burns : Journal of the International Society for Burn Injuries
|May 10, 2014
PubMed
Summary

Wound healing is a complex process that can be disrupted by severe injuries like burns. Conventional treatments like dressings do not address metabolic imbalances or insulin resistance that often occur in burn patients. Insulin has been studied for decades as a possible solution. This review shows that insulin may help improve wound recovery by promoting cellular migration and overcoming post-burn metabolic issues. The authors suggest that more research is needed to confirm these benefits and to explore how insulin can be used in clinical settings. The findings do not claim insulin is essential for all wound healing but suggest it may be a valuable addition to current treatments.

Keywords:
BiologicalsBurnsInsulinPeptide deliveryWound healingwound healinginsulin therapypost-burn recoverycellular migration

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Area of Science:

  • Endocrinology and wound healing
  • Dermatological research in metabolic medicine

Background:

Wound healing involves complex interactions between cells and signaling molecules. Skin damage initiates a cascade to restore tissue integrity. Severe injuries can disrupt metabolic balance and impair recovery. Patients with extensive burns often face insulin resistance and delayed healing. Conventional wound dressings offer limited metabolic support. These dressings cannot correct post-burn insulin resistance. This gap motivated researchers to explore alternative therapies. Exogenous insulin has been studied for decades as a possible solution.

Purpose Of The Study:

This review aims to evaluate the role of insulin in wound healing. It focuses on how insulin influences cellular migration and recovery. The study addresses the limitations of current wound care methods. It seeks to clarify insulin's potential in treating burn injuries. Researchers wanted to highlight insulin’s therapeutic benefits. They also aimed to identify knowledge gaps in the field. The goal is to guide future research and clinical applications. The study provides a synthesis of existing findings and perspectives.

Main Methods:

The review approach involved analyzing published studies on insulin and wound healing. Researchers synthesized findings from clinical and experimental trials. They focused on insulin’s effects on cellular migration and tissue repair. The literature was evaluated for consistency and clinical relevance. The review included studies on post-burn insulin resistance. Researchers compared insulin-treated and control groups. They examined the impact of insulin on metabolic imbalances. The synthesis emphasized evidence supporting insulin’s therapeutic potential.

Main Results:

Insulin promotes cellular migration in wound healing processes. It enhances recovery in patients with extensive burn injuries. Studies show improved wound closure in insulin-treated cases. Insulin helps overcome post-burn metabolic disruptions. It supports tissue regeneration and reduces healing time. The review found no significant adverse effects from exogenous insulin. Insulin application showed benefits in both in vitro and clinical settings. These findings suggest insulin’s potential as a wound healing aid.

Conclusions:

The synthesis supports insulin’s role in accelerating wound recovery. It suggests insulin may improve outcomes in severe burn cases. The evidence shows insulin can overcome post-burn metabolic issues. Researchers propose further studies to refine insulin application methods. The review highlights the need for clinical trials in this area. It suggests insulin may complement existing wound care strategies. The findings do not claim insulin is essential for all wound healing. The authors suggest more research is needed to confirm long-term benefits.

Insulin may enhance cellular migration and improve wound closure in burn patients.

Insulin helps overcome insulin resistance and supports metabolic recovery after burns.

Conventional dressings cannot correct metabolic issues, so insulin is proposed as a supplement.

Cellular migration is essential for tissue regeneration and wound closure.

Studies show improved recovery in insulin-treated burn patients compared to controls.

The authors propose further clinical trials to confirm insulin’s long-term benefits.