Abstract | BACKGROUND: METHODS AND RESULTS: To determine whether a truly causative relationship existed between FXIII activity and myocardial healing, we prospectively studied myocardial repair in FXIII-deficient mice. All FXIII(-/-) and FXIII(-)(/+) (FXIII activity <5% and 70%) mice died within 5 days after MI from left ventricular rupture. In contradistinction, FXIII(-/-) mice that received 5 days of intravenous FXIII replacement therapy had normal survival rates; however, cardiac MRI demonstrated worse left ventricular remodeling in these reconstituted FXIII(-/-) mice. Using a FXIII-sensitive molecular imaging agent, we found significantly greater FXIII activity in wild-type mice and FXIII(-/-) mice receiving supplemental FXIII than in FXIII(-/-) mice (P<0.05). In FXIII(-/-) but not in reconstituted FXIII(-/-) mice, histology revealed diminished neutrophil migration into the MI. Reverse transcriptase-polymerase chain reaction studies suggested that the impaired inflammatory response in FXIII(-/-) mice was independent of intercellular adhesion molecule and lipopolysaccharide-induced CXC chemokine, both important for cell migration. After MI, expression of matrix metalloproteinase-9 was 650% higher and collagen-1 was 53% lower in FXIII(-/-) mice, establishing an imbalance in extracellular matrix turnover and providing a possible mechanism for the observed cardiac rupture in the FXIII(-/-) mice. CONCLUSIONS: These data suggest that FXIII has an important role in murine myocardial healing after infarction.
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Authors | Matthias Nahrendorf, Kai Hu, Stefan Frantz, Farouc A Jaffer, Ching-Hsuan Tung, Karl-Heinz Hiller, Sabine Voll, Peter Nordbeck, David Sosnovik, Stefan Gattenlöhner, Mikhail Novikov, Gerhard Dickneite, Guy L Reed, Peter Jakob, Anthony Rosenzweig, Wolfgang R Bauer, Ralph Weissleder, Georg Ertl |
Journal | Circulation
(Circulation)
Vol. 113
Issue 9
Pg. 1196-202
(Mar 07 2006)
ISSN: 1524-4539 [Electronic] United States |
PMID | 16505171
(Publication Type: Journal Article, Research Support, N.I.H., Extramural, Research Support, Non-U.S. Gov't)
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Chemical References |
- Extracellular Matrix Proteins
- Factor XIII
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Topics |
- Animals
- Chemotaxis, Leukocyte
- Extracellular Matrix Proteins
(analysis, genetics)
- Factor XIII
(physiology)
- Factor XIII Deficiency
(complications)
- Heart Rupture, Post-Infarction
(etiology)
- Mice
- Mice, Knockout
- Myocardial Infarction
(complications)
- Neutrophils
(physiology)
- Ventricular Remodeling
- Wound Healing
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