Publications by authors named "Valentina D"

3 Publications

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Platelet lysate converts M (IFNγ+LPS) macrophages in CD206 TGF-β arginase M2-like macrophages that affect fibroblast activity and T lymphocyte migration.

J Tissue Eng Regen Med 2021 09 31;15(9):788-797. Epub 2021 Jul 31.

National Institute for Health, Migration and Poverty INMP/NIHMP, Rome, Italy.

Macrophages, thanks to their extreme plasticity, exert critical roles in wound healing by orchestrating tissue defenses in the early inflammatory phase, and by promoting tissue regeneration and angiogenesis at a later time point. In parallel, platelets release a large number of preformed molecules that could affect immunocyte functions. Platelet-rich plasma and platelet lysate (PL) have been widely used as a therapeutic preside for ulcers, although little is known about the effects of platelet-derived biomolecules on macrophage functions during wound healing. In this study, we analyze the effects of PL on macrophages phenotype and functions. Monocyte-derived macrophages were cultured in the presence of interferon-γ and lipopolysaccharides to induce the M1 polarization and were further exposed to 10% PL. PL treatment reduced CD80, CD86, and PDL-1 and enhanced CD206 and CD200R expression on macrophages analyzed by cytofluorimetry. Additionally, macrophage cultures show reduced TNF-α and CXCL10, while increased arginase protein, PPAR, TGF-β, and VEGF. TGF-β secretion was paralleled by the decrease of NFkB and increase of STAT3, STAT6, and SMAD2 and SMAD4. Supernatants of PL-treated macrophages induced a significant increase of type-I collagen and to a lesser extent of type-III collagen production by fibroblasts. Finally, the supernatant of PL-treated macrophages showed significantly reduced capacity to induce the in vitro migration of T lymphocytes. Our results demonstrate that PL dampens the macrophage secretion of pro-inflammatory cytokines and induces the release of arginase, TGF-β, and VEGF that may affect angiogenesis and tissue regeneration, thus facilitating the wound healing process.
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http://dx.doi.org/10.1002/term.3229DOI Listing
September 2021

Assessment of the feasibility of bipolar coagulation use to reduce hemorrhage in myomectomy performed by minilaparotomy.

Minim Invasive Ther Allied Technol 2010 Apr;19(2):75-82

Department of Obstetrics and Gynecology, Democritus University of Thrace, Greece.

The major problem with myomectomy is excessive bleeding from increased uterine blood supply, and this can be a life-threatening condition and prolong postoperative stay. The aim of our study was to evaluate our experience in symptomatic myoma excision with bipolar electrode by mini-laparotomy; we compared 67 procedures with bipolar electrode, in normal saline as distension fluid, to 42 cases performed with unipolar electrode. All participants were pre-menopausal women who had symptomatic myomas
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http://dx.doi.org/10.3109/13645701003642875DOI Listing
April 2010

Relevance of subtle echocardiographic findings in the early diagnosis of the concealed form of right ventricular dysplasia.

Eur Heart J 1989 Sep;10 Suppl D:27-8

Department of Cardiology, Medical School, University of Padua, Italy.

Right ventricular dysplasia (RVD) is an important cause of arrhythmic sudden death in young people. Echocardiographic criteria suggestive of RVD were: dilation of RV, localized bulge and dyskinesia of the inferobasal wall, structural changes of the moderator band, isolated enlargement of RV outflow tract, apical dyskinesia and trabecular disarrangement. Among 136 subjects 'at risk of high incidence of RVD', 40 had a suggestive echocardiogram. 90% of these showed lipomatous transformation at biopsy and/or developed serious ventricular arrhythmias during a mean follow-up of 42 months. Thus, echocardiography is a potent method in detecting myocardial pathology due to RVD.
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http://dx.doi.org/10.1093/eurheartj/10.suppl_d.27DOI Listing
September 1989
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