scholarly journals Enhanced soluble CD40 ligand contributes to endothelial cell dysfunction in vitro and monocyte activation in patients with diabetes mellitus: effect of improved metabolic control

Diabetologia ◽  
2005 ◽  
Vol 48 (6) ◽  
pp. 1216-1224 ◽  
Author(s):  
F. Cipollone ◽  
F. Chiarelli ◽  
G. Davì ◽  
C. Ferri ◽  
G. Desideri ◽  
...  
Metabolism ◽  
1999 ◽  
Vol 48 (10) ◽  
pp. 1236-1240 ◽  
Author(s):  
Andreas Clemens ◽  
Martina S. Klevesath ◽  
Marion Hofmann ◽  
Friedrich Raulf ◽  
Mechthild Henkels ◽  
...  

2014 ◽  
Vol 21 (1) ◽  
pp. 26-37 ◽  
Author(s):  
Enrique Guzmán-Gutiérrez ◽  
Pablo Arroyo ◽  
Rocío Salsoso ◽  
Bárbara Fuenzalida ◽  
Tamara Sáez ◽  
...  

2018 ◽  
Vol 10 ◽  
pp. 251584141881580 ◽  
Author(s):  
Sepehr Feizi

A transparent cornea is essential for the formation of a clear image on the retina. The human cornea is arranged into well-organized layers, and each layer plays a significant role in maintaining the transparency and viability of the tissue. The endothelium has both barrier and pump functions, which are important for the maintenance of corneal clarity. Many etiologies, including Fuchs’ endothelial corneal dystrophy, surgical trauma, and congenital hereditary endothelial dystrophy, lead to endothelial cell dysfunction. The main treatment for corneal decompensation is replacement of the abnormal corneal layers with normal donor tissue. Nowadays, the trend is to perform selective endothelial keratoplasty, including Descemet stripping automated endothelial keratoplasty and Descemet’s membrane endothelial keratoplasty, to manage corneal endothelial dysfunction. This selective approach has several advantages over penetrating keratoplasty, including rapid recovery of visual acuity, less likelihood of graft rejection, and better patient satisfaction. However, the global limitation in the supply of donor corneas is becoming an increasing challenge, necessitating alternatives to reduce this demand. Consequently, in vitro expansion of human corneal endothelial cells is evolving as a sustainable choice. This method is intended to prepare corneal endothelial cells in vitro that can be transferred to the eye. Herein, we describe the etiologies and manifestations of human corneal endothelial cell dysfunction. We also summarize the available options for as well as recent developments in the management of corneal endothelial dysfunction.


Author(s):  
J E Woodell ◽  
M LaBerge ◽  
E M Langan ◽  
R H Hilderman

Rapid re-endothelialization following balloon angioplasty can reduce restenosis by inhibiting smooth muscle cell migration and proliferation. However, formation of a neointima following angioplasty can be inhibited due to endothelial cell dysfunction and denudation. The purpose of this study was to evaluate mechanical tensile stress as a cause of endothelial cell dysfunction. The Flexercell® strain unit was utilized to generate both short-term cyclic and static tensile strain on cultured bovine aortic endothelial cells (BAECs). Before analysis of this loading on BAECs, strain behaviour of the Flexercell® system and DNA assay conditions were optimized. This paper demonstrates that, when compared with unloaded controls, 4-h cyclic loading at 4 per cent elongation and 0.1 Hz, and static loading at 4 per cent elongation cause a 44 and 70 per cent decrease in DNA synthesis respectively. In a companion paper, it is demonstrated that low DNA synthesis levels in mechanically loaded cells can be increased by incubation with Ap4A and/or NO donors.


2017 ◽  
Vol 161 ◽  
pp. 106-115 ◽  
Author(s):  
Claudia Núñez-Álvarez ◽  
Susana del Olmo-Aguado ◽  
Jesús Merayo-Lloves ◽  
Neville N. Osborne

2018 ◽  
Vol 77 (11) ◽  
pp. 1665-1674 ◽  
Author(s):  
Eloisa Romano ◽  
Mirko Manetti ◽  
Irene Rosa ◽  
Bianca Saveria Fioretto ◽  
Lidia Ibba-Manneschi ◽  
...  

ObjectiveIn systemic sclerosis (SSc), early microvascular injury is followed by impaired angiogenesis and peripheral capillary loss. Here, we investigated the possible contribution of the neurovascular guidance molecule Slit2 and its Roundabout (Robo) receptors to SSc-related endothelial cell dysfunction.MethodsCirculating Slit2 levels were measured in patients with SSc and healthy controls. Slit2, Robo1 and Robo4 expression was investigated in SSc and healthy skin biopsies and explanted dermal microvascular endothelial cells (MVECs). Slit2/Robo4 function in MVEC angiogenesis was studied by cell viability, wound healing and capillary-like tube formation assays.ResultsCirculating Slit2 was significantly increased in either SSc or patients with a very early diagnosis of SSc (VEDOSS) compared with controls. Interestingly, serum Slit2 levels were raised in patients with VEDOSS with nailfold videocapillaroscopy (NVC) abnormalities, while they were similar in VEDOSS with normal NVC and controls. In SSc, Slit2 and Robo4 expression was upregulated in clinically affected skin and explanted MVECs in respect to controls. The angiogenic performance of healthy MVECs was significantly reduced after challenge with recombinant human Slit2 or SSc sera. These inhibitory effects were significantly attenuated when SSc sera were preincubated with an anti-Slit2 blocking antibody. In vitro angiogenesis was severely compromised in SSc-MVECs and could be significantly ameliorated by Slit2 neutralisation or ROBO4 gene silencing. Slit2/Robo4 axis interfered with angiogenesis through the inhibition of Src kinase phosphorylation.ConclusionsIn SSc, increased circulating levels of Slit2 and activation of the Slit2/Robo4 antiangiogenic axis may contribute to peripheral microangiopathy since the very early phase of the disease.


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