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Related Concept Videos

Accessory Structures of the Skin: Sebaceous Glands01:21

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A sebaceous gland is a type of oil gland found almost all over the skin ( except palms and soles) and helps lubricate and waterproof the skin and hair. Most sebaceous glands are associated with hair follicles. They generate and excrete sebum, a mixture of lipids, onto the skin surface, thereby naturally lubricating the dry and dead layer of keratinized cells of the stratum corneum, keeping it pliable.
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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 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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The skin and mucous membranes serve as the primary line of defense against pathogens by providing both physical and chemical protection. These barriers are essential in preventing the entry and establishment of microbes, thereby maintaining the integrity of the host.
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Sulfur is an essential element in biological systems, contributing to synthesizing key biomolecules, including amino acids such as cysteine and methionine, and cofactors such as coenzyme A and biotin. Microorganisms primarily assimilate sulfur as sulfate (SO₄²⁻) from the environment, which must undergo a series of biochemical transformations before it can be incorporated into cellular components. As sulfate is highly oxidized, it must undergo assimilatory sulfate reduction to...
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Assembly of the Lipid Bilayer in the ER01:28

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Biological membranes are more than just a barrier separating cell cytoplasm from the outside environment. They are highly dynamic and help maintain the integrity and physiological stability of the cells as well as membrane-bound organelles. Membranes also play vital roles in cell-to-cell and intracellular communication.
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Profiling the Triacylglyceride Contents in Bat Integumentary Lipids by Preparative Thin Layer Chromatography and MALDI-TOF Mass Spectrometry
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A Comprehensive Review: The Bidirectional Role of Sebum in Skin Health.

Dan Li1,2,3, Ziyan Zhou3,4, Xiaobin Yang2,3

  • 1Guangdong Provincial Key Laboratory of Pharmaceutical Preparations Research and Evaluation, School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou 510006, China.

Bioengineering (Basel, Switzerland)
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Sebum

Keywords:
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Area of Science:

  • Dermatology and cosmetic science, focusing on skin physiology and pathology.

Background:

  • Sebum is crucial for skin homeostasis, barrier function, and antimicrobial defense.
  • Dysregulation of sebum contributes to common skin diseases like acne vulgaris.
  • Abnormal sebum secretion and composition are linked to follicular issues and impaired skin barrier.

Purpose of the Study:

  • To review the dual role of sebum in skin homeostasis and its pathological implications.
  • To elucidate the factors and molecular mechanisms driving abnormal sebum secretion.
  • To explore emerging therapeutic targets and research models for sebaceous gland dysfunction.

Main Methods:

  • A systematic literature search was conducted on sebum physiology and pathology.
  • Key factors influencing sebaceous gland activity were identified.
  • Molecular mechanisms involving inflammatory and hormonal pathways were analyzed.

Main Results:

  • Abnormal sebum secretion promotes acne vulgaris via follicular occlusion and Cutibacterium acnes proliferation.
  • Altered sebum composition negatively impacts the epidermal barrier.
  • High-glycemic diets, androgens, and environmental factors influence sebaceous gland activity.

Conclusions:

  • Understanding sebum's role is vital for treating skin diseases.
  • Targeting inflammatory and hormonal pathways offers therapeutic potential.
  • Advanced sebaceous gland models are needed for future research.