title: Endothelial PDGF-BB produced ex vivo correlates with relevant hemodynamic parameters in patients affected by chronic venous disease.
abstract: Surgical specimens of vein were obtained from the tertiary venous network and/or saphenous vein from patients (n=20) affected by chronic venous disease (CVD). Into the venous segments, which subsequently were surgically ablated, the following hemodynamic parameters were assessed by echo-color-doppler (ECD): peak systolic velocity, end diastolic velocity, whose combination allowed the calculation of the resistance index (RI) and the reflux time (RT). Highly purified venous endothelial cell (VEC) cultures derived from venous segments of these CVD patients were then characterized for the profile of cytokines and chemokines released in the culture supernatants. Among the 27 cytokines and chemokines examined, we found a positive and significant correlation (R=0.5; p=0.03) only between the spontaneous release of PDGF-BB by VEC cultures and the RT values of the patients from which the VEC were isolates. In addition, the release of PDGF-BB in the VEC culture supernatants was significantly (p<0.01) increased upon in vitro treatment with recombinant TNF-α. By using pharmacological inhibitors, specific for the main pathways, NF-kB, ERK1/2 and p38 MAPK, activated by exposure of endothelial cells to TNF-α, we found that only NF-kB appeared to be significantly involved in mediating the PDGF-BB induction by TNF-α. Of interest, the release of PDGF-BB in response to the in vitro inflammatory stimulation, maintained a positive and significant correlation with RT (R=0.6; p=0.01), while showing a negative correlation with RI (R=-0.5; p=0.03). The potential implications of our findings for the pathophysiology of CVD are discussed.
authors.affiliation: Department of Morphology, Surgery and Experimental Medicine and LTTA Centre, University of Ferrara, Ferrara, Italy.
authors.forename: Veronica
authors.initials: V
authors.lastname: Tisato
authors.forename: Paolo
authors.initials: P
authors.lastname: Zamboni
authors.forename: Erica
authors.initials: E
authors.lastname: Menegatti
authors.forename: Sergio
authors.initials: S
authors.lastname: Gianesini
authors.forename: Ilaria
authors.initials: I
authors.lastname: Volpi
authors.forename: Giorgio
authors.initials: G
authors.lastname: Zauli
authors.forename: Paola
authors.initials: P
authors.lastname: Secchiero
mesh_terms: D000077214:Becaplermin; D001783:Blood Flow Velocity; D002478:Cells, Cultured; D018925:Chemokines / Q000096:biosynthesis / Q000378:metabolism; D016207:Cytokines / Q000096:biosynthesis / Q000378:metabolism; D042783:Endothelial Cells / Q000378:metabolism*; D048049:Extracellular Signal-Regulated MAP Kinases / Q000037:antagonists & inhibitors; D006439:Hemodynamics; D006801:Humans; D007249:Inflammation / Q000276:immunology / Q000378:metabolism; D016328:NF-kappa B / Q000037:antagonists & inhibitors / Q000378:metabolism*; D020574:Proto-Oncogene Proteins c-sis / Q000096:biosynthesis*; D012501:Saphenous Vein / Q000378:metabolism / Q000503:physiopathology; D014409:Tumor Necrosis Factor-alpha / Q000378:metabolism*; D014652:Vascular Diseases / Q000378:metabolism* / Q000503:physiopathology; D048051:p38 Mitogen-Activated Protein Kinases / Q000037:antagonists & inhibitors
chemical_list: D018925:Chemokines; D016207:Cytokines; D016328:NF-kappa B; D020574:Proto-Oncogene Proteins c-sis; D014409:Tumor Necrosis Factor-alpha; D000077214:Becaplermin; D048049:Extracellular Signal-Regulated MAP Kinases; D048051:p38 Mitogen-Activated Protein Kinases