journal of Histology & Histopathology

Journal of Histology & Histopathology

ISSN 2055-091X
Original Research

N-cadherin has a protective role in stable human atherosclerotic plaques: a morphological and immunohistochemical study

Giuseppe Musumeci1*, Rosa Imbesi1, Gaetano Magro2, Rosalba Parenti3, Marta Anna Szychlinska1, Rosario Scuderi4, Sergio Castorina1,5 and Paola Castrogiovanni1

*Correspondence: Giuseppe Musumeci g.musumeci@unict.it

1. Department of Bio-Medical Sciences, Human Anatomy and Histology Section, School of Medicine, University of Catania, Catania, Italy.

Author Affiliations

2. Department G.F. Ingrassia, Azienda Ospedaliero-Universitaria "Policlinico-Vittorio Emanuele" Anatomic Pathology, University of Catania, Catania, Italy.
3. Department of Bio-Medical Sciences, Section of Physiology, University of Catania, Catania, Italy.
4. Department of Medical and Pediatric Sciences, University of Catania, Italy.
5. Fondazione Mediterranea ''G.B. Morgagni'', Catania, Italy.

Abstract

Atherosclerosis is a complex disease, the onset of which depends on various components of the vascular system, metabolism and immune system. It generates the fibro-fatty plaque or stable plaque characterized by accumulation of lipids in the intima of the arteries, a fibrous cap covering the atheromacore which may consists in lipid-laden cells (macrophages andvascular smooth muscle cells), proteoglycans, collagen, elastin, foam cells and, sometimes, cholesterol crystals needle-like clefts, fibrinand neovessels. The progression of the plaque leads to unstable atherosclerotic lesions. The result will be a large plaque, consisting of an evident lipid core surrounded by a fibrous cap, infiltrates of immunocompetent cells and calcium deposits. Advanced plaque is characterized by macrophages invasion and by the thinning of the fibrous cap. Progression of atherosclerotic plaque can lead to its rupture and result in the occlusion of an artery or in the formation of a thrombus. Apoptosis in the fibrouscap, rich in vascular smooth muscle cells and macrophages, and its subsequent weakening seems to beanimportantregulatorofplaque stability. In our study, we collected specimens from stable atherosclerotic plaques in the right or left internal carotid artery of patients with clinical symptoms. Histology and histochemistry were performed in specimens for cell identification and detection of structural alterations. Immunohistochemical analysis related to caspase-3 and N-cadherin was performed in order to highlight the pro-survival role of N-cadherin against apoptosis in the stable atherosclerotic plaques. Our results showed that when expression of N-cadherin is evident and strong in the stable atherosclerotic plaques, apoptosis, expressed by caspase-3 immunostaining, is not detected, as reported by recent literature. The aim of our study was to acquire greater knowledge on the biological mechanisms related to plaque vulnerability in order to develop new therapies to maintain atherosclerotic plaque stability avoiding its rupture which could determine consequences such as thrombosis.

Keywords: Atherosclerosis, apoptosis, caspase-3, human atherosclerotic plaques, immunohistochemistry, n-cadherin, hematoxylin and eosin, masson's trichrome

ISSN 2055-091X
Volume 1
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