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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.
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The hypodermis (the subcutaneous layer or superficial fascia) is present directly below the dermis. It connects the skin to the underlying fascia (fibrous tissue) of the bones and muscles. It is not strictly a part of the skin, although the border between the hypodermis and dermis can be difficult to distinguish. The hypodermis consists of well-vascularized, loose, areolar connective tissue and adipose tissue, which functions as a mode of fat storage and provides insulation and cushioning for...
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Skin is the first line of defense and encounters a variety of microbes. Some pathogenic strains are often the cause of a broad range of infections of the skin and other body systems. These conditions can affect people of all ages and may have different causes, including genetic factors, infections, autoimmune reactions, environmental factors, and lifestyle choices.
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The integumentary system is the organ system that comprises the skin and its associated structures. It is the largest system in the human body and plays a crucial role in protecting and maintaining homeostasis. The integumentary system serves several functions including protection, regulation, sensation, and secretion.
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A Mouse Fetal Skin Model of Scarless Wound Repair
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Cutis Laxa.

Miski Mohamed1, Michiel Voet, Thatjana Gardeitchik

  • 1Radboud University Nijmegen Medical Center, IGMD, Nijmegen, The Netherlands, Miski.Mohamed@radboudumc.nl.

Advances in Experimental Medicine and Biology
|January 21, 2014
PubMed
Summary
This summary is machine-generated.

Inherited cutis laxa involves genetic defects causing abnormal extracellular matrix synthesis, leading to severe multisystemic disease. Diagnosis and differentiation of these rare genetic disorders are crucial for patient management.

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Area of Science:

  • Genetics
  • Biochemistry
  • Dermatology

Background:

  • Cutis laxa is a rare connective tissue disorder characterized by loose, sagging skin.
  • It results from genetic defects affecting extracellular matrix protein synthesis.
  • Inherited forms can involve multiple organ systems and be life-threatening.

Purpose of the Study:

  • To provide a clinical guideline for diagnosing and differentiating inherited cutis laxa.
  • To offer a theoretical reference for clinicians, biochemists, and geneticists.
  • To highlight the association of cutis laxa with inborn errors of metabolism.

Main Methods:

  • Review of genetic defects and metabolic pathways associated with cutis laxa.
  • Analysis of inheritance patterns (autosomal dominant, autosomal recessive, X-linked recessive).
  • Clinical and biochemical diagnostic criteria for differentiating subtypes.

Main Results:

  • Identification of diverse genetic defects underlying extracellular matrix abnormalities.
  • Association of specific inborn errors of metabolism with cutis laxa phenotypes.
  • Description of multisystemic involvement in various inherited forms.

Conclusions:

  • Accurate diagnosis and differentiation of inherited cutis laxa are essential due to its complexity and severity.
  • Understanding the underlying genetic and metabolic basis is key for future therapeutic strategies.
  • No effective treatment is currently available, emphasizing the need for further research.