Letter by Csont and Ferdinandy regarding article, "Biglycan is required for adaptive remodeling after myocardial infarction".

To the Editor: We read with great interest the article by Westermann et al1 in which the authors showed that biglycan expression was strongly increased in the myocardium after permanent coronary occlusion in wild-type mice. In the hearts of bgn −/ 0 mice 21 days after coronary occlusion, however, collagen matrix organization was impaired, and several parameters of left ventricular function were deteriorated. Furthermore, these animals showed increased mortality rates after infarction. The authors conclude that the complete absence of biglycan is deleterious and prevents the establishment of a stable infarct scar and hemodynamic adaptation, suggesting that biglycan is required for proper infarct healing. Although the observations of the authors are most valuable, the major conclusion of the authors1 is …