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The skin is divided into epidermis, dermis, and hypodermis, the skin's outermost, middle, and inner layers. The human epidermal layer regularly undergoes renewal, where old, dead cells are replaced by new cells. Epidermal stem cells or EpiSCs divide and differentiate to restore the lost cells. For the renewal process, some EpiSCs continuously self-renew. In contrast, few others differentiate into transit-amplifying cells, which later form prickle or spinous cells, followed by granular...
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The papillary and reticular dermis are the two layers of the dermis. They are made of connective tissue with fibers of collagen extending from one to the other, making the border between the two somewhat indistinct. The dermal papillae extending into the epidermis belong to the papillary layer, whereas the dense collagen fiber bundles below belong to the reticular layer.
Reticular Layer
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Skin cancer is a type of cancer that occurs when there is an abnormal growth of skin cells, usually triggered by damage to the DNA within the skin cells. It is primarily caused by exposure to ultraviolet (UV) radiation from the sun or artificial sources like tanning beds. Skin cancer is the most common type of cancer worldwide, and its incidence continues to rise.
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Epidermal stem cells (EpiSCs) are mainly located at the basal layer of the epidermis. These cells repair minor injuries of the skin and replace dead skin cells. However, EpiSCs’ cannot heal severe wounds such as major burns or those from diabetes or hereditary disorders. In such cases, culturing the epidermal stem cells from the patient is possible and has yielded successful treatment options, such as laboratory-grown skin grafts. These grafts are synthesized using a patient’s own...
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The skin plays a crucial role in the synthesis of vitamin D, a vital nutrient for various physiological processes in the body. Vitamin D is unique because it can be synthesized in the skin through a series of chemical reactions triggered by exposure to ultraviolet B (UVB) radiation from sunlight.
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The epidermis, the outermost layer of the skin, is composed of several distinct layers. From deep to superficial, the layers of the epidermis are as follows:
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Related Experiment Video

Updated: Feb 25, 2026

Generation of Genetically Modified Organotypic Skin Cultures Using Devitalized Human Dermis
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Engineering Skin with Skinny Genes.

Anika Böttcher1, Heiko Lickert2, Matthias Tschöp3

  • 1Institute of Diabetes and Regeneration Research, Helmholtz Diabetes Center, Helmholtz Center Munich, Am Parkring 11, 85748 Garching, Germany.

Cell Stem Cell
|August 5, 2017
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Summary
This summary is machine-generated.

Genetically engineered skin transplants producing GLP-1 can prevent obesity. This study suggests a novel approach for treating metabolic disorders like obesity and diabetes.

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Area of Science:

  • Metabolic disorders
  • Obesity and diabetes research
  • Regenerative medicine

Background:

  • Rising global prevalence of obesity and type 2 diabetes presents a significant health challenge.
  • Current treatments for metabolic disorders have limitations.
  • Incretins like GLP-1 play a crucial role in glucose homeostasis and appetite regulation.

Purpose of the Study:

  • To investigate the potential of genetically engineered skin transplants for metabolic disorder treatment.
  • To assess the efficacy of GLP-1 producing skin grafts in preventing diet-induced obesity.

Main Methods:

  • Development of genetically engineered skin grafts capable of producing the incretin glucagon-like peptide-1 (GLP-1).
  • Transplantation of these engineered skin grafts into a preclinical model.
  • Evaluation of the effects on diet-induced obesity and metabolic parameters.

Main Results:

  • Successful proof-of-concept study demonstrating the feasibility of engineered skin grafts.
  • Engineered skin grafts effectively produced and secreted GLP-1.
  • Prevention of diet-induced obesity in the preclinical model.

Conclusions:

  • Genetically engineered skin transplants producing GLP-1 offer a promising therapeutic strategy.
  • This approach could provide a novel treatment for metabolic disorders, including obesity and diabetes.
  • Further research is warranted to explore clinical applications.