29 research outputs found

    Productivity Spillovers from Foreign MNEs on Domestic Manufacturing Firms: Is Co-location Always a Plus?

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    The paper analyses productivity spillovers from foreign MNEs on domestic manufacturing firms. Using a database on foreign MNEs in Italy, our results reveal that local firms do benefit from the presence of foreign MNEs, and the effect is higher when local and foreign firms in manufacturing sectors are co-located. However, spillovers benefiting domestic firms are likely to be less influenced by co-location when foreign MNEs are in services sectors as the latter are different from manufacturing industries under a number of aspects that overcome the effect of distance. Indeed, in these sectors, proximity and interaction are often obtained through professional mobility and temporary inter-organizational routines.Multinational Firms, Co-Location, Proximity, Spillover Effects, Customer-Supplier Interaction, Vertical Linkages

    The Internationalization of Production by Italian Industrial Districts' Firms: Structural and Behavioural Determinants

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    The paper argues that structural and behavioural determinants combine to influence internationalisation of production through FDI by industrial districts' firms. As far as the former, leadership effects, represented by the presence of large firms within the district, and Porterian effects, denoted by the intensity of domestic rivalry, positively influence the likelihood that district firms will start internationalise through FDI. Moreover, spillovers induced by the presence of foreign-owned MNCs positively impact on the district's degree of internationalisation, provided it has already autonomously developed the ability to grow internationally. As far as behavioural features, previous export relationships increase the district firms' likelihood of undertaking FDI, while innovative capacity joins and strengthens internationalisation processes already started

    Small-molecule Polθ inhibitors provide safe and effective tumor radiosensitization in preclinical models

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    Purpose: DNA polymerase theta (Polθ, encoded by the POLQ gene) is a DNA repair enzyme critical for microhomology mediated end joining (MMEJ). Polθ has limited expression in normal tissues but is frequently overexpressed in cancer cells and, therefore, represents an ideal target for tumor-specific radiosensitization. In this study we evaluate whether targeting Polθ with novel small-molecule inhibitors is a feasible strategy to improve the efficacy of radiotherapy. Experimental Design: We characterized the response to Polθ inhibition in combination with ionizing radiation in different cancer cell models in vitro and in vivo. Results: Here, we show that ART558 and ART899, two novel and specific allosteric inhibitors of the Polθ DNA polymerase domain, potently radiosensitize tumor cells, particularly when combined with fractionated radiation. Importantly, noncancerous cells were not radiosensitized by Polθ inhibition. Mechanistically, we show that the radiosensitization caused by Polθ inhibition is most effective in replicating cells and is due to impaired DNA damage repair. We also show that radiosensitization is still effective under hypoxia, suggesting that these inhibitors may help overcome hypoxia-induced radioresistance. In addition, we describe for the first time ART899 and characterize it as a potent and specific Polθ inhibitor with improved metabolic stability. In vivo, the combination of Polθ inhibition using ART899 with fractionated radiation is well tolerated and results in a significant reduction in tumor growth compared with radiation alone. Conclusions: These results pave the way for future clinical trials of Polθ inhibitors in combination with radiotherapy
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