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Related Concept Videos

Hair Cells01:22

Hair Cells

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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.
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Accessory Structures of the Skin: Hair and Hair Follicles01:16

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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...
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Related Experiment Video

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Control of Cell Geometry through Infrared Laser Assisted Micropatterning
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Cellular behavior controlled by bio-inspired and geometry-tunable nanohairs.

Chaejeong Heo1, Chanho Jeong, Hyeon Seong Im

  • 1Center for Neuroscience Imaging Research (CNIR), Institute for Basic Science (IBS), Suwon 16419, Republic of Korea. taeilkim@skku.edu.

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Summary

Mimicking cicada wings and cactus spines, researchers developed controllable nanohairs. These structures guide cell migration and viability, showing potential for biomedical applications like organogenesis.

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Area of Science:

  • Biomimetics
  • Nanotechnology
  • Cell Biology

Background:

  • Nature-inspired structures like cicada wings and cactus spines possess unique properties.
  • These properties arise from specific structural designs, influencing biological interactions.
  • Understanding these structures can inspire novel biomaterials.

Purpose of the Study:

  • To develop geometry-controllable nanohairs mimicking cicada wing and cactus spine structures.
  • To quantitatively analyze cell migration behavior on these engineered nanohair surfaces.
  • To explore the potential of these nanostructures in biomedical applications.

Main Methods:

  • Fabrication of nanohairs with controllable geometry (vertical and stooped).
  • Culturing neuroblastoma cells on flat, vertical, and stooped nanohair surfaces.
  • Quantitative measurement of cell migration and proliferation.
  • Analysis of intracellular actin filament changes.

Main Results:

  • Neuroblastoma cell proliferation was significantly reduced on vertical nanohairs.
  • Cell migration on stooped nanohairs was directionally influenced by the hair pattern.
  • Cells on flat surfaces exhibited random movement, while vertical nanohairs restricted cell movement.
  • Stooped nanohairs promoted higher forward cell migration compared to flat and vertical structures.
  • Cellular behavior changes correlated with intracellular actin filament alterations.

Conclusions:

  • Engineered nanohairs can control cell viability and guide directional migration.
  • Vertical and stooped nanostructures offer promising platforms for biomedical applications, including organogenesis.
  • Biomimetic nanostructures provide a versatile tool for manipulating cellular behavior.