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Related Concept Videos

Fibril-associated Collagen01:11

Fibril-associated Collagen

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Fibril-associated collagens are a type of collagens present in the extracellular matrix with interrupted triple helices or FACIT (Fibril-associated collagens interrupted triple-helices). FACIT help connect and attach the collagen fibrils with each other as well as with other proteins of the extracellular matrix.
For example, the type II collagen fibrils in cartilage have covalently bound type IX fibril-associated collagens at regular intervals. Other types of fibril-associated collagens are...
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Structural Protein Function01:56

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Structural proteins are a category of proteins responsible for functions ranging from cell shape and movement to providing support to major structures such as bones, cartilage, hair, and muscles. This group includes proteins such as collagen, actin, myosin, and keratin.
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Collagens are the Major Structural Proteins of ECM01:13

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Three main types of fibers are secreted by fibroblasts: collagen fibers, elastic fibers, and reticular fibers. Collagen fiber is made from fibrous protein subunits linked together to form a long, straight fiber. Collagen fibers, while flexible, have great tensile strength, resist stretching, and give ligaments and tendons their characteristic resilience and strength. These fibers hold connective tissues together, even during the body's movement.
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Fibrous Proteins00:55

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Fibrous proteins are either long and narrow proteins or assemble to form long and thin structures. They contain repetitive units and usually consist of either alpha helices or beta sheets and, in rare cases, a mix of both. The amino acids in the primary structure often consist of repeating amino acid sequences. The role of fibrous proteins is primarily structural. Many are located in the extracellular matrix and are present in connective tissues to impart strength and joint mobility. They are...
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Updated: Jan 13, 2026

Production of Nanofibrillar Patterned Collagen for Tissue Engineering
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Production of Nanofibrillar Patterned Collagen for Tissue Engineering

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Collagen Fibril Orientation In Vitro: From Formation to Advanced Biomaterial Development.

Yuliya Nashchekina1, Alexey Nashchekin2

  • 1Institute of Cytology of the Russian Academy of Sciences, Center of Cell Technologies, Tikhoretsky Pr. 4, St. Petersburg 194064, Russia.

Biomimetics (Basel, Switzerland)
|October 28, 2025
PubMed
Summary

Creating oriented collagen fibrils in vitro is challenging due to unknown cellular mechanisms. This review explores physical methods like fields to organize collagen, aiding tissue engineering.

Keywords:
collagen fibrilhierarchical organizationmicrostructureorientationself-assemblytissue engineering

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Area of Science:

  • Biomaterials Science
  • Cell Biology
  • Tissue Engineering

Background:

  • Extracellular matrix (ECM) proteins, like collagen, are crucial for tissue function.
  • Collagen fibril orientation significantly impacts cellular functions, including migration and ECM secretion.
  • In vivo, cells dictate ECM protein orientation, a process not fully understood for in vitro applications.

Purpose of the Study:

  • To review methods for creating oriented collagen fibrils in vitro.
  • To explore the role of physical fields in controlling collagen organization.
  • To discuss the potential of oriented collagen fibrils in tissue engineering.

Main Methods:

  • Review of existing literature on collagen fibril orientation.
  • Discussion of physical methods: mechanical, electric, and magnetic fields.
  • Analysis of in vitro techniques for collagen self-assembly.

Main Results:

  • Current in vitro methods for oriented collagen fibrils face limitations.
  • Physical fields offer promising approaches for controlling collagen alignment.
  • Understanding cellular mechanisms is key to replicating native tissue structures.

Conclusions:

  • Oriented collagen fibrils are vital for biomimetic materials.
  • Further research into cellular regulation of ECM orientation is needed.
  • Physical field-guided fabrication holds potential for advanced tissue engineering.