Previous Page  2 / 11 Next Page
Information
Show Menu
Previous Page 2 / 11 Next Page
Page Background

Page 29

Volume 2

DEMENTIA AND DEMENTIA CARE

ADVANCES IN ADDICTION SCIENCE AND MEDICINE

July 24-25, 2019 | Rome, Italy

10

th

International Conference on

2

nd

World Congress on

&

Addiction Science 2019 & Dementia Care 2019

July 24-25, 2019

Journal of Clinical Psychiatry and Neuroscience

J Clin Psychiatr Neurosci, Volume 2

Cerebral venules are major factors in formation of brain microinfarcts at systemic

inflammation: Implications for dementia

Gunel Ayyubova, Nigar Guliyeva, Shahla Huseynova, Leyla Yildirim, Shahana Gurbanova

and

Ilaha Sadigi

Azerbaijan Medical University, Azerbaijan

Statement of the Problem

: Despite the widely accepted facts regarding the role of neuroinflammation as well as vascular

pathology in the pathogenesis and progression of neurodegenerative diseases no special significance was given to the pathology

of different cerebral microvessels. The purpose of this study is to describe the structural alterations in neuro-glio-vascular

elements of brain cortex at early stages of acute inflammation.

Methodology

: Systemic inflammation was induced by intravenous injection of purified lypopolysacharide (LPS) from E. coli

[Serotip 0111:B4] at a dose of 1,0 mg/kg dissolved in saline. Semi thin and ultrathin tissue sections were examined by means of

light and electron microscopy.

Findings

: Investigation of brain capillaries revealed insignificant changes in the integrity of their wall. Despite of edematous

perivascular Astrocytic EndFeet (AEF) the architecture of surrounding brain parenchyma was structurally intact. However, the

destructive changes in the wall of cortical venules and their obturation with blood cells were found as indicatives of early onset

of neuroinflammation. Pathological changes were especially intense in the postcapillary venules draining blood from brain

capillary bed and permeability of which is greater than that of other vessels. In fact, the disruption of intercellular tight junctions,

significant increase in the amount of pinocytotic vesicles in endotheliocytes, the appearance of transendothelial channels and

thickening of perivascular basal membranes were indicators of blood-brain barrier disruption in those vessels. The discontinuous

adluminal plasma membrane of endothelial cells and amorphous material in the lumen of venules were observed. Though AEF

around venules were not swollen the integrity of their membranes was disturbed. Moreover, electron microscopy revealed the

apparent indicators of parenchymal damage around venules: degenerative changes in nerve and glial cells, signs of vasogenic

edema among neuropil elements etc.

Conclusion

: the pathology of cerebral venules should be considered as primary causes for brain microinfarcts with subsequent

neurodegeneration at inflammatory conditions.

Biography

Gunel Ayyubova is a senior lecturer, PhD holder at the department of Histology, Embryology and Cytology of Azerbaijan Medical

University. Her research area as the Neuroscience and topic of research is the Immunofluorescence and Electron microscopy of brain

tissue at inflammatory conditions and neurodegeneration.

gunel.ayubova@gmail.com