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Related Concept Videos

Pigmentation01:19

Pigmentation

The color of the skin is influenced by a number of pigments, including melanin, carotene, and hemoglobin. Recall that melanin is produced by cells called melanocytes, which are found scattered throughout the stratum basale of the epidermis. The melanin is transferred to the keratinocytes via melanosomes.
Melanin occurs in two primary forms: eumelanin that provides black and brown pigment and pheomelanin that provides red color. Dark-skinned individuals produce more melanin than those with pale...
Changes in Skin Color: Clinical Perspectives01:14

Changes in Skin Color: Clinical Perspectives

The first thing a clinician sees is the skin, so the examination of the skin should be part of any thorough physical examination. Most skin disorders are relatively benign, but a few, including melanomas, can be fatal if untreated. A couple of the more noticeable disorders, albinism and vitiligo, affect the appearance of the skin and its accessory organs.
Albinism
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Introduction to the Integumentary System01:25

Introduction to the Integumentary System

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The skin, which is the primary organ of the integumentary system, consists of three main layers: the epidermis, dermis, and hypodermis (subcutaneous tissue). The epidermis is the...
Cells of the Epidermis01:24

Cells of the Epidermis

The epidermis is made of four or five layers of epithelial cells, depending on its location in the body. From deep to superficial, these layers are the stratum basale, stratum spinosum, stratum granulosum, stratum lucidum, and stratum corneum.
The cells in all these layers except the stratum basale are called keratinocytes, a type of cell that manufactures and stores the protein keratin. The keratinocytes in the stratum corneum are dead and regularly slough away, being replaced by cells from...
Layers of the Epidermis01:21

Layers of the Epidermis

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:
Stratum Basale
Stratum basale, also known as the stratum germinativum, is the deepest layer of the epidermis. It is composed of a single layer of actively dividing cells called basal cells or basal keratinocytes. These cells constantly undergo cell division to replenish the upper layers of the epidermis. Additionally, melanocytes, which...
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Skin Diseases and Disorders

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.
Gram-positive Staphylococcus spp. and Streptococcus spp. are responsible for many of the most common skin infections. However, many...

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Ethnic skin types: are there differences in skin structure and function?

A V Rawlings1

  • 1AVR Consulting Ltd, Kingsmead, Northwich, Cheshire CW9 8FH, UK. tonyrawlings@aol.com

International Journal of Cosmetic Science
|May 22, 2008
PubMed
Summary
This summary is machine-generated.

Ethnic skin characteristics vary significantly, with darker skin types showing younger properties and stronger barrier function against challenges, despite differences in lipid levels and desquamation. Further research is needed to understand these inherent biological differences.

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Area of Science:

  • Dermatology
  • Skin Biology
  • Ethnic Skin Research

Background:

  • Limited literature exists on the characteristics of skin of color, despite comprising the majority of the global population.
  • Previous studies on ethnic skin differences have often been small-scale, with interindividual variations sometimes overshadowing racial distinctions.
  • Recent calls for large-scale studies addressing genetic and phenotypic differences among racial groups have led to new research initiatives.

Purpose of the Study:

  • To review and synthesize current knowledge on the biophysical and somatosensory characteristics of different ethnic skin types.
  • To highlight the known differences in skin aging, barrier function, and sensitivity across various racial groups.
  • To identify gaps in the literature and emphasize the need for further research into the underlying biological differences in ethnic skin.

Main Methods:

  • Literature review and synthesis of existing studies on ethnic skin characteristics.
  • Analysis of data comparing skin color, melanin content, photoaging, barrier function (stratum corneum properties, transepidermal water loss, ceramide levels), and skin sensitivity.
  • Comparison of biophysical properties and age-related changes across different racial groups (Caucasian, East Asian, African American, Negroid).

Main Results:

  • Melanin's photoprotective effect influences aging rates, with Caucasians generally showing earlier wrinkling and sagging.
  • Darker skin types tend to retain younger skin properties with age and exhibit stronger stratum corneum (SC) barrier function upon chemical or mechanical challenge, despite variations in lipid levels and ceramide content.
  • Asian skin may be more sensitive to exogenous chemicals due to a thinner SC and higher eccrine gland density, while Negroid subjects show increased pore size and sebum secretion.

Conclusions:

  • Significant differences exist in the biophysical and somatosensory characteristics of ethnic skin types, influencing aging, barrier function, and sensitivity.
  • While darker skin shows resilience in some aspects, specific challenges like hyperpigmentation and potential desquamation issues require further investigation.
  • More research is crucial to fully understand the inherent biological differences in ethnic skin and inform tailored dermatological care.