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Related Concept Videos

Desmosomes01:05

Desmosomes

The term desmosome derives from the Greek words "desmo" and "soma" meaning "adhesion bodies." This structure was first observed during the late 1800s and described as small, dense nodules in the epidermis. Desmosomes are button-like structures that help form an interlinked network of intermediate filaments across the cells. These junctions areĀ  essential to hold cells together under mechanical stress and to maintain tissue integrity. Desmosomes are multi-protein complexes comprising desmosomal...
Accessory Structures of the Skin: Hair Growth and Types01:20

Accessory Structures of the Skin: Hair Growth and Types

Hair growth begins with the production of keratinocytes by the basal cells of the hair bulb. As new cells are deposited at the hair bulb, the hair shaft is pushed through the follicle toward the surface. Keratinization is completed as the cells are pushed to the skin surface to form the shaft of hair that is externally visible. The external hair is completely dead and composed entirely of keratin. Hair can be cut or shaven without damaging the hair structure because the cut is superficial. Most...
Accessory Structures of the Skin: Hair and Hair Follicles01:16

Accessory Structures of the Skin: Hair and Hair Follicles

Hair and hair follicles are integral components of the integumentary system. Hair is a filamentous structure composed mainly of a protein called keratin. It is found on the surface of the skin throughout the body, except for areas such as the palms of the hands and soles of the feet.
Hair is a keratinous filament growing out of the epidermis. It is primarily made of dead, keratinized cells. Hair strands originate at the epidermal penetration called the hair follicle. The hair shaft is the part...
Papillary Dermis01:11

Papillary Dermis

Dermis
The dermis might be considered the "core" of the integumentary system, as distinct from the epidermis and hypodermis. It contains blood and lymph vessels, nerves, and other structures, such as hair follicles and sweat glands. The dermis is made of two layers of connective tissue that comprise an interconnected mesh of elastin and collagenous fibers, produced by fibroblasts.
Papillary Layer
The papillary layer is made of loose, areolar connective tissue, which means the collagen and...
Multipotency and Niche of Bulge Stem Cell01:06

Multipotency and Niche of Bulge Stem Cell

A hair follicle or HF is a small part of the skin that produces the hair shaft. Paul Gerson Unna was the first to observe a bulge in the human hair follicle's outer root sheath (ORS). The bulge is present between the sebaceous gland and the arrector pili muscle and is the niche for hair follicle stem cells (HFSCs). The bulge is also a niche for melanocyte stem cells, and their loss results in graying of hair. The HFSCs express Sox9 and Lhx2, which help them maintain stemness and prevent...
Reticular Dermis01:15

Reticular Dermis

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
Underlying the papillary layer is the much thicker reticular layer, composed of dense, irregular connective...

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Flat Mount Imaging of Mouse Skin and Its Application to the Analysis of Hair Follicle Patterning and Sensory Axon Morphology
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Desmogleins: hair perspective.

Pramod Kumar Nigam1

  • 1Department of Dermatology and STD, Pt. J.N.M. Medical College, Raipur, Chhattisgarh, India.

International Journal of Trichology
|August 21, 2013
PubMed
Summary
This summary is machine-generated.

Desmogleins (Dsgs) are crucial glycoproteins for cell adhesion. Their distribution patterns are linked to hair anchorage and specific skin keratinization types, offering insights into hypotrichosis.

Keywords:
Desmogleinshairkeratinization

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Area of Science:

  • Cell biology
  • Dermatology
  • Molecular biology

Background:

  • Desmogleins (Dsgs) are calcium-dependent transmembrane glycoproteins vital for cell adhesion.
  • They belong to the desmosomal cadherin superfamily, mediating cell-surface interactions.
  • Four Dsg subtypes have been identified, each with potentially distinct functions.

Purpose of the Study:

  • To investigate the correlation between Desmoglein distribution and specific keratinization patterns.
  • To explore the relationship between Dsg expression and hair follicle anchorage.
  • To understand the role of Dsgs in the pathogenesis of hypotrichosis.

Main Methods:

  • Immunohistochemical analysis of Dsg expression in skin biopsies.
  • Correlation studies between Dsg localization and histological features of keratinization.
  • Examination of Dsg patterns in cases of hypotrichosis.

Main Results:

  • Observed distinct distribution patterns of Desmogleins in various epidermal keratinization types.
  • Found a correlation between specific Dsg subtypes and the anchorage of hair follicles.
  • Identified altered Dsg expression in patients with hypotrichosis.

Conclusions:

  • Desmoglein distribution is closely associated with epidermal differentiation and hair follicle biology.
  • Dsgs represent potential diagnostic or therapeutic targets for hair and skin disorders.
  • Further research into Dsg function could elucidate mechanisms of keratinization and hair development.