Optimum illumination wavelength for fluorescence spectroscopy of atheromatous plaque

Fluorescence spectroscopy of normal and atheromatous human aorta: optimum illumination wavelength

10.1117/12.44012 ◽

1991 ◽

Cited By ~ 1

Author(s):

Andrew L. Alexander ◽

Carolyn M. Davenport ◽

Arthur F. Gmitro

Keyword(s):

Fluorescence Spectroscopy ◽

Human Aorta ◽

Illumination Wavelength

Download Full-text

A preliminary study on the potential of front face fluorescence spectroscopy for the discrimination of Moroccan virgin olive oils and the prediction of their quality

Analytical Methods ◽

10.1039/d0ay01746a ◽

2021 ◽

Author(s):

Hicham Zaroual ◽

El Mestafa El Hadrami ◽

Romdhane Karoui

Keyword(s):

Fluorescence Spectroscopy ◽

Olive Oil ◽

Virgin Olive Oil ◽

Front Face ◽

Virgin Olive Oils ◽

Olive Oils ◽

Preliminary Study

This study examines the feasibility of using front face fluorescence spectroscopy (FFFS) to authenticate 41 virgin olive oil (VOO) samples collected from 5 regions in Morocco during 2 consecutive crop seasons.

Download Full-text

Increased Expression of u-PA and u-PAR on Monocytes by LDL and Lp(a) Lipoproteins – Consequences for Plasmin Generation and Monocyte Adhesion

Thrombosis and Haemostasis ◽

10.1055/s-0037-1614531 ◽

1999 ◽

Vol 81 (04) ◽

pp. 594-560 ◽

Cited By ~ 10

Author(s):

Florence Ganné ◽

Marc Vasse ◽

Jean-Louis Beaudeu ◽

Jacqueline Peynet ◽

Arnaud François ◽

...

Keyword(s):

Fold Increase ◽

Surface Expression ◽

Cell Surface Expression ◽

Atheromatous Plaque ◽

Monocyte Adhesion ◽

Blood Monocytes ◽

Proteolytic Cascade ◽

Ecm Degradation ◽

Dose Dependent Increase ◽

Dose Dependent

SummaryMonocyte-derived foam cells figure prominently in rupture-prone regions of atherosclerotic plaque. As urokinase/urokinase-receptor (u-PA/u-PAR) is the trigger of a proteolytic cascade responsible for ECM degradation, we have examined the effect of atherogenic lipoproteins on monocyte surface expression of u-PAR and u-PA. Peripheral blood monocytes, isolated from 10 healthy volunteers, were incubated with 10 to 200 µg/ml of native or oxidised (ox-) atherogenous lipoproteins for 18 h and cell surface expression of u-PA and u-PAR was analysed by flow cytometry. Both LDL and Lp(a) induced a dose-dependent increase in u-PA (1.6-fold increase with 200 μg/ml of ox-LDL) and u-PAR [1.7-fold increase with 200 μg/ml of ox-Lp(a)]. There is a great variability of the response among the donors, some of them remaining non-responders (absence of increase of u-PA or u-PAR) even at 200 μg/ml of lipoproteins. In positive responders, enhanced u-PA/u-PAR is associated with a significant increase of plasmin generation (1.9-fold increase with 200 μg/ml of ox-LDL), as determined by an amidolytic assay. Furthermore, monocyte adhesion to vitronectin and fibrinogen was significantly enhanced by the lipoproteins [respectively 2-fold and 1.7-fold increase with 200 μg/ml of ox-Lp(a)], due to the increase of u-PAR and ICAM-1, which are receptors for vitronectin and fibrinogen. These data suggest that atherogenous lipoproteins could contribute to the development of atheromatous plaque by increasing monocyte adhesion and trigger plaque weakening by inducing ECM degradation.

Download Full-text

Fibrinolytic Activity of the Arterial Wall

Thrombosis and Haemostasis ◽

10.1055/s-0038-1653503 ◽

1969 ◽

Vol 21 (01) ◽

pp. 001-011 ◽

Cited By ~ 9

Author(s):

K Onoyama ◽

K Tanaka

Keyword(s):

Carotid Artery ◽

Fibrinolytic Activity ◽

Arterial Wall ◽

Aortic Wall ◽

Internal Carotid ◽

Atheromatous Plaque ◽

Human Fibrinogen ◽

The Media ◽

The Common ◽

Almost All

SummaryThe tissue fibrinolysis was studied in 550 specimens of 7 kinds of arteries from 80 fresh cadavers, using Astrup’s biochemical method and Todd’s histochemical method with human fibrinogen.In the microscopically normal aortic wall, almost all specimens had the fibrinolytic activity which was the strongest in the adventitia and the weakest in the media.The fibrinolytic activity seemed to be localized in the endothelium.The stronger activity lay in the adventitia of the aorta and the pulmonary artery and all layers of the cerebral artery.The activity of the intima and media of the macroscopically normal areas seemed to be stronger in the internal carotid artery than in the common carotid artery.Mean fibrinolytic activity of the macroscopically normal areas seemed to decrease with age in the intima and the media of the thoracic aorta and seemed to be low in the cases with a high atherosclerotic index.The fibrinolytic activities of all three layers of the fibrous thickened aorta seemed to decrease, and those of the media and the adventitia of the atheromatous plaque to increase.The fibrinolytic activity of the arterial wall might play some role in the progress of atherosclerosis.

Download Full-text