Publications by authors named "Olga Pastorino"

Introduction And Aims: The limited therapeutic options for ischemic stroke treatment render necessary the identification of new strategies. In recent years, it has been shown that natural compounds may represent a valid therapeutic opportunity. Therefore, the present study aimed to evaluate the protective effect of Ruta graveolens water extract (RGWE) in an in vivo experimental model of brain ischemia.

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Targeting necroptosis is considered a promising therapeutic strategy in cancer, including Glioblastoma Multiforme (GBM), one of the most lethal brain tumors. Necroptosis is a mechanism of programmed cell death overcoming the apoptosis resistance mechanism underlying GBM tumorigenesis and malignant progression. N6-isopentenyladenosine (iPA), adenosine modified with isoprenoid derivative, displays antitumor activity in different cancer models.

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Background: Vasculogenic mimicry (VM) is a functional microcirculation pattern formed by aggressive tumor cells. Thus far, no effective drugs have been developed to target VM. Glioblastoma (GBM) is the most malignant form of brain cancer and is a highly vascularized tumor.

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Glioblastoma is among the most common malignant brain tumors and has a dismal prognosis due to the poor response to therapeutic regimens such as ionizing radiation and DNA-alkylating agents. In our study, we investigated the radiosensitizing activity of the N-isopentenyladenosine (iPA), an naturally modified adenosine harboring an isopenenyl moiety, which shows antiproliferative effects on glioblastoma cell lines. We observed that co-treatment with ionizing radiation and iPA at micromolar concentration inhibited colony formation and viability of glioblastoma cell lines but not of non-malignant human cells.

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In recent years, the endocannabinoid system has received great interest as a potential therapeutic target in numerous pathological conditions. Cannabinoids have shown an anticancer potential by modulating several pathways involved in cell growth, differentiation, migration, and angiogenesis. However, the therapeutic efficacy of cannabinoids is limited to the treatment of chemotherapy-induced symptoms or cancer pain, but their use as anticancer drugs in chemotherapeutic protocols requires further investigation.

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Article Synopsis
  • Angiogenesis involves processes like endothelial cell growth and movement to form new blood vessels and is regulated by various signaling pathways.
  • The tube formation assay is an effective and straightforward lab technique to study how natural products affect angiogenesis and the underlying molecular mechanisms.
  • The water extract of Ruta graveolens (RGWE) prevents human umbilical vein endothelial cells from forming networks, and this effect can be reversed by activating the MEK pathway.
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Article Synopsis
  • Glioblastoma (GBM) is a highly aggressive brain cancer that has poor treatment outcomes despite surgery, radiation, and chemotherapy.
  • Antiangiogenic therapies, which target abnormal blood vessel growth in GBM, are often evaded due to the tumor's ability to undergo vasculogenic mimicry, a process where GBM forms its own blood supply.
  • Research showed that histone deacetylase inhibitors (HDACis) like vorinostat and MC1568 effectively reduce tube formation and cell invasion in GBM, suggesting they could be valuable in targeting this alternate vascularization mechanism.
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Angiogenesis is a process encompassing several steps such as endothelial cells proliferation, differentiation and migration to form a vascular network, involving different signal transduction pathways. Among these, ERK1/2 signaling mediates VEGF-dependent signaling pathway. Here we report that the water extract of Ruta graveolens (RGWE), widely known as a medicinal plant, is able to impair in a dose-dependent manner, cell network formation without affecting cell viability.

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