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EXTRACELLULAR MATRIX
ASWINI.A
Reg No:115011305004
2nd M.Tech(nanotechnology)-integrated
THERE ARE TWO TYPES OF
EXTRACELLULAR MATRIX
Animal
extracellular
matrix
1
Plant
extracellular
matrix
2
Extracellular
matri...
PROCESSES
FIXTURE
Mechanism,cells
DEGRADATION
Degtadation substance,mechanism
MECHANICAL PROPERTIES OF THE
EXTRACELLULAR MATRIX
1 Stiffnes and elasticity
gene expression2
4 differentiation
5 Durotaxis
FUNCTION OF EXTRACELLULAR
MATRIX
Varying
degree
Stiffness
and
elasticity
Soft brain
tissue to
hard bone
tissue
Changes
one...
FOUR MECHANICAL PROPERTIES OF
EXTRACELLULAR MATRIX
Elasticity and stiffness1
Gene expression on effect
2
Durotaxis3
EXTRACELLULAR MATRIX GENE
EXPRESSION
• Varying
degree
stiffness and
elasticity,form
soft brain
tissue to hard
bone tissue....
Non-proteoglycans2
proteoglycans1
THEY ARE TWO MOLECULAR COMPONENTS
ARE THERE
THANK YOU
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Extracellular matrix

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The Extracellular Matrix
Living tissues are not just accumulations of tightly packed cells. Much of a tissue's volume is made up of extracellular space ('extra-' meaning 'outside' or 'beyond,' as in 'extraterrestrial'). This void is filled with a complex meshwork called the extracellular matrix.

Rather than being inert filler material, like the Styrofoam packing around a shipment of glassware, the extracellular matrix is a dynamic, physiologically active component of all living tissues. In addition to providing structural support for the cells embedded within a tissue, the extracellular matrix guides their division, growth, and development. In other words, the extracellular matrix largely determines how a tissue looks and functions.

The extracellular matrix is made up of proteoglycans, water, minerals, and fibrous proteins. A proteoglycan is composed of a protein core surrounded by long chains of starch-like molecules called glycosaminoglycans.
Fibrous Proteins
Several types of fibrous proteins, including collagen, elastin, fibronectin, and laminin, are found in varying amounts within the extracellular matrix of different tissues. These proteins are produced by fibroblasts, but they aren't secreted in their finished form. Rather, they're released as 'precursor' molecules; their subsequent incorporation into the extracellular matrix is guided by the fibroblasts in accordance with the functional needs of a particular tissue.

Collagen is a strong, stretch-resistant fiber that provides tensile strength to your tissues. It's the most abundant protein in the human body. Collagen is the principle constituent of your tendons and ligaments and provides support for your skin. When you sustain an injury to your skin, collagen is the stuff that heals the wound and forms the scar. There are at least a dozen different types of collagen in your body, all adapted to the specific needs of the tissues where they're found.

Elastin is a stretchy and resilient protein. Much like a rubber band, elastin permits tissues to return to their original shape after they've been stretched. Ultraviolet light damages elastin fibers and interferes with their reconstruction, which accounts for the sagging and wrinkling seen in skin that has been chronically exposed to sunlight.

Fibronectin is secreted from fibroblasts in a water-soluble form but is quickly assembled into an insoluble meshwork, which serves several functions. Other cells use the fibronectin matrix to migrate through a tissue, which is particularly important during embryonic development; fibronectin helps position cells within the extracellular matrix; and fibronectin is necessary for cellular division and specialization in many tissues.

Laminin forms sheet-like networks that serve as the 'glue' between dissimilar tissues. It is the principle protein in basement membranes, which are present wherever connective tissue contacts muscle, nervous, or epithelial tissue

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Extracellular matrix

  1. 1. EXTRACELLULAR MATRIX ASWINI.A Reg No:115011305004 2nd M.Tech(nanotechnology)-integrated
  2. 2. THERE ARE TWO TYPES OF EXTRACELLULAR MATRIX Animal extracellular matrix 1 Plant extracellular matrix 2 Extracellular matrix 3
  3. 3. PROCESSES FIXTURE Mechanism,cells DEGRADATION Degtadation substance,mechanism
  4. 4. MECHANICAL PROPERTIES OF THE EXTRACELLULAR MATRIX 1 Stiffnes and elasticity gene expression2 4 differentiation 5 Durotaxis
  5. 5. FUNCTION OF EXTRACELLULAR MATRIX Varying degree Stiffness and elasticity Soft brain tissue to hard bone tissue Changes one cell type to another Cell migration Attracts positively Translocated cell Using regrowth Works with stem cells Regrow all parts of human body
  6. 6. FOUR MECHANICAL PROPERTIES OF EXTRACELLULAR MATRIX Elasticity and stiffness1 Gene expression on effect 2 Durotaxis3
  7. 7. EXTRACELLULAR MATRIX GENE EXPRESSION • Varying degree stiffness and elasticity,form soft brain tissue to hard bone tissue. • The extracellular matrix effects on both cell behavior and gene expression. • Matrix elasticity can direct cellular differention, the cell changes from one cell type to another.
  8. 8. Non-proteoglycans2 proteoglycans1 THEY ARE TWO MOLECULAR COMPONENTS ARE THERE
  9. 9. THANK YOU

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