Hair Matrix
Hair Matrix - Related Videos
01:22
Hair Cells
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2019
Hair cells are the sensory receptors of the auditory system—they transduce mechanical sound waves into electrical energy that the nervous system can understand. Hair cells are located in the organ of Corti within the cochlea of the inner ear, between the basilar and tectorial membranes. The actual sensory receptors are called inner hair cells. The outer hair cells serve other functions, such as sound amplification in the cochlea, and are not discussed in detail here. Hair cells are named after...
08:54
Validated LC-MS/MS Panel for Quantifying 11 Drug-Resistant TB Medications in Small Hair Samples
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Cited by 5 •
2020
Current methods of analyzing patients’ adherence to complex drug resistant-tuberculosis (DR-TB) regimens can be inaccurate and resource-intensive. Our method analyzes hair, an easily collected and stored matrix, for concentrations of 11 DR-TB medications. Using LC-MS/MS, we can determine sub-nanogram drug levels that can be utilized to better understand drug adherence.
08:38
Extraction and Analysis of Cortisol from Human and Monkey Hair
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Cited by 199 •
2014
Cortisol (CORT) accumulates in the growing hair shaft of humans and nonhuman primates. We describe methods for extracting and analyzing hair CORT with high precision and sensitivity. Measurement of hair CORT is particularly well-suited for assessing chronic stress over periods of weeks to months.
01:16
Accessory Structures of the Skin: Hair and Hair Follicles
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2025
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...
08:36
Generation of Integration-free Human Induced Pluripotent Stem Cells Using Hair-derived Keratinocytes
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Cited by 12 •
2015
This manuscript provides a step-by-step procedure for the derivation and maintenance of human keratinocytes from plucked hair and subsequent generation of integration-free human induced pluripotent stem cells (hiPSCs) by episomal vectors.
FAQs
Signals from the dermal papilla regulate the behavior of nearby matrix keratinocytes, helping coordinate their rapid division with subsequent differentiation. This interaction links a follicle’s signaling environment to the amount and organization of material entering the developing hair shaft. Studying this relationship helps explain how cellular communication controls follicle growth and how altered signaling may affect hair production.
As matrix-derived cells move upward, they progressively differentiate and become densely packed with keratin. Their position within this sequence is therefore tied to their changing structural role, from proliferating cells near the follicle base to components of the emerging hair shaft and inner root sheath. This spatial progression explains how organized tissue growth produces distinct follicle structures.
Associated melanocytes contribute pigment to the developing hair as matrix cells generate the shaft. This places pigment production alongside the structural processes that shape the hair, making the matrix a site where color and fiber formation are biologically connected. Examining this relationship can help researchers interpret how disruption of matrix-associated activity may alter hair color as well as growth.
Because matrix cells proliferate rapidly and supply the developing hair, changes in their activity can influence how effectively a follicle produces hair during its growth cycle. Disruption may appear as altered growth, structure, or pigmentation rather than as a single uniform outcome. Comparing these effects helps connect cellular behavior in the matrix with visible changes in hair biology.
Alopecia research can use the hair matrix to examine how disrupted cell proliferation, differentiation, signaling, or pigment contribution changes follicle output. The matrix provides a focused context for linking cellular events to reduced or altered hair growth. This perspective supports investigation of why follicles fail to maintain normal production and which aspects of follicle biology require further study.
The hair matrix is relevant because it demonstrates how coordinated cellular interactions, rapid proliferation, and differentiation contribute to tissue formation and regeneration. Studying these processes provides biological context for research on wound repair and regenerative medicine, where investigators seek to understand how tissues are produced, maintained, or restored. Its follicle setting offers a model for examining organized regenerative activity.