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Smooth muscle cells of human intracranial aneurysms assume phenotypic features similar to those of the atherosclerotic plaque
- Source :
- Cardiovascular pathology : the official journal of the Society for Cardiovascular Pathology, Cardiovascular Pathology, Vol. 22, No 5 (2013) pp. 339-44
- Publication Year :
- 2012
-
Abstract
- Objectives Characterize the phenotypic features of smooth muscle cells (SMCs) in the wall of human saccular intracranial aneurysms (sIAs). Methods and Results We investigated by means of immunohistochemistry the expression of the cytoskeletal differentiation markers α-smooth muscle actin (α-SMA), smooth muscle myosin heavy chains (SMMHCs), and smoothelin in 26 sIAs and 15 nonaneurysmal cerebral arteries. In addition, S100A4, a recently identified marker of dedifferentiated SMCs in atherosclerotic plaques, was also investigated. Six sIAs and 5 nonaneurysmal arteries were used for morphometric analysis. sIAs displayed a significant medial atrophy compared with nonaneurysmal cerebral arteries; moreover, sIA SMCs showed marked decrease of α-SMA and SMMHCs expression and disappearance of smoothelin. Unexpectedly, S100A4 was strongly up-regulated in media SMCs of sIAs. Conclusions In sIAs, media SMCs acquire a dedifferentiated phenotype and show de novo expression of S100A4, characteristic features of atherosclerotic plaque SMCs.
- Subjects :
- Male
Pathology
Cerebral arteries
Muscle Proteins
ddc:616.07
ddc:616.89
0302 clinical medicine
Myosin
Cytoskeleton
Aged, 80 and over
0303 health sciences
CD68
S100 Proteins
Cell Differentiation
General Medicine
respiratory system
Middle Aged
musculoskeletal system
Immunohistochemistry
Plaque, Atherosclerotic
Phenotype
cardiovascular system
Female
Cardiology and Cardiovascular Medicine
Adult
medicine.medical_specialty
Myocytes, Smooth Muscle
Biology
Pathology and Forensic Medicine
03 medical and health sciences
Atrophy
medicine
otorhinolaryngologic diseases
Humans
S100 Calcium-Binding Protein A4
cardiovascular diseases
Actin
030304 developmental biology
Aged
Myosin Heavy Chains
Intracranial Aneurysm
Cell Dedifferentiation
Cerebral Arteries
medicine.disease
Actins
ddc:616.8
Cytoskeletal Proteins
Case-Control Studies
Smoothelin
030217 neurology & neurosurgery
Biomarkers
Subjects
Details
- ISSN :
- 18791336 and 10548807
- Volume :
- 22
- Issue :
- 5
- Database :
- OpenAIRE
- Journal :
- Cardiovascular pathology : the official journal of the Society for Cardiovascular Pathology
- Accession number :
- edsair.doi.dedup.....12a3eea7500aa9dfb388f9ec03ac8f97