Curcumin is a compound isolated from turmeric, a plant known for its medicinal use. Recently, there is a growing interest in the medical community in identifying novel, low-cost, safe molecules that may be used in the treatment of inflammatory and neoplastic diseases. An increasing amount of evidence suggests that curcumin may represent an effective agent in the treatment of several skin conditions. We examined the most relevant in vitro and in vivo studies published to date regarding the use of curcumin in inflammatory, neoplastic, and infectious skin diseases, providing information on its bioavailability and safety profile. Moreover, we performed a computational analysis about curcumin’s interaction towards the major enzymatic targets identified in the literature. Our results suggest that curcumin may represent a low-cost, well-tolerated, effective agent in the treatment of skin diseases. However, bypass of limitations of its in vivo use (low oral bioavailability, metabolism) is essential in order to conduct larger clinical trials that could confirm these observations. The possible use of curcumin in combination with traditional drugs and the formulations of novel delivery systems represent a very promising field for future applicative research.
The anti-SARS-Cov-2 activity of the iron-binding protein Lactoferrrin has been investigated in epithelial and macrophagic cell models using a Pseudovirus decorated with the SARS-CoV-2 Spike glycoprotein. The human and, even more, the nutraceutically available bovine Lactoferrin inhibit pseudoviral infection in all cellular models tested. The bovine protein efficiently counteracts the deleterious effects of purified Spike on iron and inflammatory homeostasis, as shown by restored levels of the main proteins of the iron-handling system and, in the case of macrophagic THP-1 cells, of the proinflammatory cytokines IL-1β and IL-6. A direct interaction between Lactoferrin and Spike is likely at the basis of the observed effects, as demonstrated by an in vitro pull-down assay. Finally, in silico approaches have been applied to analyze the interactions of human and bovine Lactoferrins with Transferrin Receptor 1, a potential gate for SARS-CoV-2 entry into cells, as well as the binding of the bovine protein to different variants of concern of the SARS-Cov-2 Spike glycoprotein. Our results give hope for the employment of bovine Lactoferrin as an adjuvant of the standard of care therapies in COVID-19 treatment.
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