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Fibril-associated Collagen01:11

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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.
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Several body functions deteriorate with age. The external signs of aging are easily identifiable. For example, the skin becomes dry, less elastic, and thins out, forming wrinkles. The skin of the face begins to appear looser due to a decrease in the levels of elastic and collagen fibers in the connective tissue. Additionally, melanin production in the hair follicle decreases with age, resulting in gray hair. Moreover, the senses of sight and hearing decline, so glasses and hearing aids may...
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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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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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Unlike epithelial tissue, which is composed of cells closely packed with little or no extracellular space in between, connective tissue cells are dispersed in a matrix. This extracellular matrix (ECM) is composed of fibrous proteins like collagen, elastin, and fibronectin in a ground substance consisting of interstitial fluid, cell adhesion proteins, and proteoglycans. The proteoglycans form a gel-like material in the spaces between cells and provide hydration, buffering, binding, and force...
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Collagen Biosynthesis, Processing, and Maturation in Lung Ageing.

Ceylan Onursal1, Elisabeth Dick1, Ilias Angelidis1

  • 1Comprehensive Pneumology Center, Institute of Lung Biology and Disease, Helmholtz-Zentrum München, Member of the German Center of Lung Research (DZL), Munich, Germany.

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Summary
This summary is machine-generated.

Lung aging alters collagen composition and crosslinking, impacting chronic lung diseases like COPD and IPF. These age-related changes in the extracellular matrix are key to understanding disease progression and developing new treatments.

Keywords:
advanced-glycation end productsageingchronic lung diseasecollagencrosslinkingextracellular matrixlysyl oxidase

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Area of Science:

  • Biochemistry
  • Cell Biology
  • Pulmonary Medicine

Background:

  • The extracellular matrix (ECM), particularly collagen, is crucial for lung structure and function.
  • Chronic lung diseases like COPD and IPF often affect the elderly, suggesting age-related lung alterations contribute to disease.
  • Understanding collagen changes during lung aging is vital for disease pathogenesis and regenerative medicine.

Purpose of the Study:

  • To review collagen biosynthesis, processing, and turnover in the context of lung aging.
  • To summarize known alterations in collagen composition, modification, and crosslinking with age.
  • To highlight the implications of these age-induced changes for lung disease and bioengineering.

Main Methods:

  • Review of existing literature on collagen metabolism and lung aging.
  • Analysis of proteomic data from mouse lung aging studies.
  • Examination of changes in collagen types, crosslinking enzymes, and advanced glycation endproducts (AGEs).

Main Results:

  • Collagen biosynthesis machinery appears largely unchanged with age.
  • Specific collagen types (IV, VI, XIV, XVI) show altered levels in aged mouse lungs.
  • Enzymatic collagen crosslinking decreases, while AGE-mediated crosslinking increases with lung aging.

Conclusions:

  • Lung aging significantly alters collagen composition and the nature of collagen crosslinks.
  • These age-related ECM changes are implicated in chronic lung disease pathogenesis.
  • Further research into these alterations may lead to novel therapeutic strategies for lung diseases and bioengineering applications.