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Rapid Generation of Amyloid from Native Proteins In vitro
Published on: December 5, 2013
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Serum Amyloid A1 Is an Epithelial Prorestitutive Factor
Benjamin H Hinrichs1, Jason D Matthews1, Dorothée Siuda2
1Division of Experimental Pathology, Emory University, Atlanta, Georgia.
The American Journal of Pathology
|January 26, 2018
Summary
Serum amyloid A1 (SAA1) promotes intestinal healing by enhancing epithelial cell movement and attachment. This study reveals SAA1
Area of Science:
- Gastroenterology
- Immunology
- Cell Biology
Background:
- Intestinal wound healing involves endogenous proteins with pro-restitutive properties.
- Serum amyloid A1 (SAA1), an acute-phase reactant, is found in inflamed tissues and attracts phagocytes.
- The specific role of SAA1 in intestinal wound repair remains undescribed.
Purpose of the Study:
- To investigate the role of Serum amyloid A1 (SAA1) in intestinal epithelial wound repair.
- To elucidate the mechanism by which SAA1 influences intestinal epithelial cells.
- To examine the in vivo regulation and function of SAA1 during wound recovery.
Main Methods:
- In vitro assays assessing intestinal epithelial cell migration, spreading, and attachment.
- Formyl peptide receptor 2 (FPR2) dependency studies.
- Murine model of intestinal wound healing.
- Analysis of SAA1 expression, immune cell infiltration, and cytokine profiles.
Main Results:
- SAA1 significantly induces intestinal epithelial cell migration, spreading, and attachment via a formyl peptide receptor 2-dependent pathway.
- SAA1-induced effects are concentration and time-dependent, linked to reactive oxygen species production and altered p130 Crk-associated substrate staining.
- In vivo, SAA1 is dynamically regulated during wound recovery, correlating with immune cell influx and increased pro-inflammatory cytokines.
Conclusions:
- SAA1 plays a crucial role in promoting intestinal epithelial wound recovery.
- SAA1 exhibits a physiological function within the wound microenvironment, influencing both epithelial and immune responses.
- This study identifies SAA1 as a key mediator in the complex process of intestinal healing.
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