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Related Concept Videos

Role of Hematopoietic Growth Factors01:28

Role of Hematopoietic Growth Factors

Hematopoietic growth factors are molecules that regulate the differentiation rate of hematopoietic stem cells (HSCs). Erythropoietin (EPO), primarily produced by the kidneys, plays a crucial role in erythrocyte production. When oxygen levels in the blood are low, EPO is released into the bloodstream, reaching the bone marrow, where it stimulates HSCs to differentiate and mature into erythrocytes, which are vital for oxygen transport.
Thrombopoietin (TPO), mainly released by the liver,...
Regulation of Hematopoietic Stem Cells01:01

Regulation of Hematopoietic Stem Cells

All blood and immune cells are produced from the multipotent hematopoietic stem cells (HSCs) by the process of hematopoiesis. However, they all have a limited life span. In addition, many are depleted in immune surveillance or combatting an injury or infection. This makes blood one of the most regenerative tissues. Hematopoiesis helps replenish these blood and immune cells, restoring the body's normal functioning. However, overproduction of blood and immune cells can make them cancerous or...
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TGF - β Signaling Pathway

The TGF-β signaling pathway regulates cell growth, differentiation, adhesion, motility, and development. TGF-β ligands that induce TGF-β signaling are synthesized in their latent form. Several proteases or cell surface receptors such as integrins act upon the latent form, releasing the active ligand. There are three types of mammalian TGF-βs: (TGF-β1, TGF-β2, and TGF-β3) that bind as homodimers or heterodimers to TGF-β receptors. The TGF-β receptors are of three kinds RI, RII, and RIII. The RI...
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Rapidly dividing tumors, embryos, and wounded tissues require more oxygen than usual, lowering the oxygen concentration in the blood. At low oxygen or hypoxic conditions, an oxygen-sensitive transcription factor called the hypoxia-inducible factor 1 or HIF1 is activated. HIF1 is a dimeric protein of alpha (ɑ) and beta (β) subunits.  Under optimal oxygen conditions, HIF1β is present in the nucleus while HIF1ɑ remains in the cytosol. HIF1ɑ is hydroxylated by prolyl hydroxylase and factor...
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Designing Growth Media for Bioreactors

Growth media provide essential nutrients that support cell growth and metabolism, thereby enhancing the yield of valuable products such as enzymes, antibiotics, and biomass. Designing an effective growth medium involves balancing all components to prevent nutrient limitations or toxic excesses, both of which can impair growth and reduce product yields.Composition of a Typical Growth MediumA typical growth medium contains carbon and nitrogen sources, salts, vitamins, trace elements, and...

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Covalent Binding of BMP-2 on Surfaces Using a Self-assembled Monolayer Approach
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Biomaterials that regulate growth factor activity via bioinspired interactions.

Gregory A Hudalla1, William L Murphy

  • 1Department of Biomedical Engineering, University of Wisconsin, 5009 Wisconsin Institutes of Medical Research, 1111 Highland Ave. Madison, WI 53705 (USA).

Advanced Functional Materials
|September 17, 2011
PubMed
Summary

Bioinspired synthetic biomaterials non-covalently localize growth factors within the extracellular matrix (ECM). These engineered materials enhance tissue regeneration by controlling growth factor activity for therapeutic applications.

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Area of Science:

  • Biomaterials science
  • Tissue engineering
  • Biochemistry

Background:

  • Growth factors are crucial for tissue regeneration, but their activity is naturally localized by the extracellular matrix (ECM).
  • Synthetic biomaterials can mimic ECM interactions to control growth factor availability.
  • Non-covalent interactions are key to regulating growth factor activity within biomaterials.

Purpose of the Study:

  • To review bioinspired strategies for non-covalently localizing growth factor activity within synthetic biomaterials.
  • To highlight the use of these materials in tissue engineering and regenerative medicine.
  • To discuss in vivo evidence of their efficacy in promoting tissue regeneration.

Main Methods:

  • Review of recent literature on biomaterial modification with heparin glycosaminoglycans and heparin-binding peptides.
  • Analysis of strategies involving modular growth factor design for ECM component interaction.
  • Examination of layer-by-layer assemblies for growth factor sequestration at cell-material interfaces.

Main Results:

  • Biomaterials modified with heparin glycosaminoglycans can modulate growth factor release.
  • Heparin-binding peptides on biomaterials can sequester growth factors and influence stem cell behavior.
  • Modular growth factors and polyelectrolyte assemblies demonstrate effective growth factor localization.

Conclusions:

  • Bioinspired synthetic biomaterials offer promising strategies for non-covalently controlling growth factor activity.
  • These approaches are effective in promoting tissue regeneration, as shown by in vivo studies.
  • Further development of these materials holds significant potential for regenerative medicine applications.