<abstract xmlns="http://www.w3.org/1999/xhtml"><sec><h3>Introduction</h3><p>as an outcome of sterile inflammation-inducing acute ischemic processes, many splenic cells enter the circulatory system and migrate into the lesion, defending tissues against the spread of ischemia or enhancing necrosis.</p></sec><sec><h3>Objective</h3><p>investigating the therapeutic effect of splenic morphological response to sterile inflammation-inducing myocardial infarction.</p></sec><sec><h3>Material and method</h3><p>We examined the weight and structure of the heart and spleen of 106 patients deceased due to acute myocardial infarction. These data were correlated with demographic (personal) and epidemiological data, and disease history. After morphological investigation of archived myocardial and splenic tissue samples, the acute ischemia-induced structural alterations of splenic samples were quantified using a digital morphometric method. Results were evaluated in comparison to the myocardial ischemia coefficient. Changes in distribution of ischemia-induced cell types were characterized by defining the immunological phenotypes of macrophages (M1 vs. M2). Spleen samples from patients without history of ischemia were used as controls.</p></sec><sec><h3>Results</h3><p>The modification of the spleen weight was associated with an increase in peripheral blood leucocyte levels. Our morphological analysis proved a positive correlation between the ischemia coefficient and the decrease of spleen weight. Structural analysis of splenic tissue revealed the collapse of red pulp sinusoids, a significant size decrease of the white pulp marginal zone (p&lt;0.05), and depleted follicles with irregular margins without any distinct germinative centers. Concurrently, with the proliferation of granulocytes, the increase of M1 macrophages was observed in the myocardium, and a higher M1/M2 ratio was detected in the marginal zone of splenic follicles.</p></sec><sec><h3>Conclusion</h3><p>On the background of acute ischemia, time critically determines the dynamic structural changes of the spleen. Along with reducing the marginal zone, immunomodulation targeting its cellular composition will be a putative therapeutic approach in the future.</p></sec></abstract>

Introductionas an outcome of sterile inflammation-inducing acute ischemic processes, many splenic cells enter the circulatory system and migrate into the lesion, defending tissues against the spread of ischemia or enhancing necrosis.Objectiveinvestigating the therapeutic effect of splenic morphological response to sterile inflammation-inducing myocardial infarction.Material and methodWe examined the weight and structure of the heart and spleen of 106 patients deceased due to acute myocardial infarction. These data were correlated with demographic (personal) and epidemiological data, and disease history. After morphological investigation of archived myocardial and splenic tissue samples, the acute ischemia-induced structural alterations of splenic samples were quantified using a digital morphometric method. Results were evaluated in comparison to the myocardial ischemia coefficient. Changes in distribution of ischemia-induced cell types were characterized by defining the immunological phenotypes of macrophages (M1 vs. M2). Spleen samples from patients without history of ischemia were used as controls.ResultsThe modification of the spleen weight was associated with an increase in peripheral blood leucocyte levels. Our morphological analysis proved a positive correlation between the ischemia coefficient and the decrease of spleen weight. Structural analysis of splenic tissue revealed the collapse of red pulp sinusoids, a significant size decrease of the white pulp marginal zone (p<0.05), and depleted follicles with irregular margins without any distinct germinative centers. Concurrently, with the proliferation of granulocytes, the increase of M1 macrophages was observed in the myocardium, and a higher M1/M2 ratio was detected in the marginal zone of splenic follicles.ConclusionOn the background of acute ischemia, time critically determines the dynamic structural changes of the spleen. Along with reducing the marginal zone, immunomodulation targeting its cellular composition will be a putative therapeutic approach in the future.

The morphological response of the heart and spleen following acute myocardial infarction-induced sterile inflammation: a clinicopathological study

Student, „George Emil Palade” University of Medicine, Pharmacy, Science and Technology

„George Emil Palade” University of Medicine, Pharmacy, Science and Technology

Bulletin of Medical Sciences

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Introductionas an outcome of sterile inflammation-inducing acute ischemic processes, many splenic cells enter the circulatory system and migrate into the...

The morphological response of the heart and spleen following acute myocardial infarction-induced sterile inflammation: a clinicopathological study

Published Online: Dec 03, 2020

Page range: 105 - 112

DOI: https://doi.org/10.2478/orvtudert-2019-0015

Keywords
myocardial infarction, spleen, cardio-splenic axis (axis)

© 2019 Harsa Mihai Iuliu et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

The morphological response of the heart and spleen following acute myocardial infarction-induced sterile inflammation: a clinicopathological study

Published Online: Dec 03, 2020

Page range: 105 - 112

DOI: https://doi.org/10.2478/orvtudert-2019-0015

Keywordsmyocardial infarction, spleen, cardio-splenic axis (axis)

© 2019 Harsa Mihai Iuliu et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Keywords
myocardial infarction, spleen, cardio-splenic axis (axis)