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Lipidomics Screening of Anti-inflammatory Drugs and Drug Candidates in Vitro - Part A

Cardiovascular complications of NSAIDs, selective for inhibition of COX-2, stimulated interest in microsomal prostaglandin E synthase-1 (mPGES-1) as an alternative drug target. Global deletion of mPGES-1 in mice suppresses PGE2 and augments PGI2 by PGH2 substrate rediversion. Unlike COX-2 inhibition or gene deletion, mPGES-1 deletion does not cause a predisposition to thrombogenesis and hypertension. However, cell-specific deletion of mPGES-1 reveals that the predominant substrate rediversion product amongst the prostaglandins varies by cell type, complicating drug development. We have developed an ultra performance liquid chromatography/ tandem mass spectrometry (UPLC-MS/MS) technique that allows the quantification of a wide range of lipids beyond the prostaglandin pathway (leukotrienes, anandamide and the 2-arachidonylglycerol cascades). This study is designed to examine different pathway interventions from the arachidonic acid cascade by anti-inflammatory compounds (with a focus on mPGES-1 inhibition) in whole human blood in vitro (Part A) and ex vivo (Part B). In Part A, whole human blood will be donated by healthy volunteers and treated with screening compounds in vitro (outside of the body). Experiments will be performed to measure an array of lipids in plasma and serum from pre-stimulated whole blood treated with a single or a combination of the test compounds. This study may reveal pathways previously unknown to be affected by the existing anti-inflammatory drugs and drug candidates, and will possibly suggest new indications and/or side effects.

Start: November 2013
Serum Prevalence of Sars-Cov-2 Antibodies in Pre-pandemic Blood Samples (SPARE)

The first reports of infections caused by SARS-CoV-2 were released from Wuhan, China in December 2019. From there, the infection quickly spread into a pandemic form. The clinical manifestation of the infection varies enormously, from totally asymptomatic or mildly symptomatic forms, with nonspecific and flu-like manifestations, to an acute respiratory distress syndrome which, in patients requiring hospitalization in the ICU and mechanical ventilation invasive, can lead to death, especially in elderly subjects and carriers of co-morbidities. Recently, the association of blood groups ABO as possible biological markers of susceptibility to COVID-19, has been evaluated, linking blood type O with a lower chance of infection, blood type A with the highest risk, and blood group B with the greatest complications. In Italy, the first non "imported" case dates back to February 2020, although new evidence on subjects tested positive for the antibody assay on serum samples suggests that the virus started to circulate before the official date. Few are the data relating to asymptomatic infections or with mild non-specific and nuanced symptoms that have been quantified in about 85% of the total number of infected. Moreover, thanks to the availability of serological tests that identify the presence of anti-SARS-CoV-2 antibodies, it emerged that a proportion of the population was infected by the virus and developed an antibody response and that almost 30% of the people with antibodies were asymptomatic. In order to evaluate the seroprevalence of COVID-19 infection among asymptomatic subjects the investigators will conduct specific serological tests (total antibodies) to identify the prevalence of SARS-2-CoV antibodies among healthy blood donors who went to transfusion facilities of the DIMT in Venice during the pandemic (about 2500 periodic donors who referred to the Transfusion Center in the period between May and October 2019). Patients afferent to the Interinstitutional Multidisciplinary Biobank (BioBIM) of the Research Center of the IRCCS San Raffaele Pisana in Rome, with or without concomitant co-morbidities (about 1000 subject) will be also tested. All samples will be analyzed for any association with sex, age group and blood group.

Start: December 2020
Energy Profile and Low Intensity Activity (PROFILE)

The recent literature has highlighting the importance of the time of SB and the level of physical activity (PA) as predictors of metabolic cardio risks. Now, sedentary lifestyles are well recognized as one of the causes of mortality. As with physical activity, a dose-response relationship appears to exist: mortality would increase with time spent in sedentary behaviors. However, this relationship would not be linear: the more the daily sitting time increases, the more the consequences on mortality are important. It is now well demonstrated that time spent in sedentary adult behaviour finds primarily its origin in the work, characterized by prolonged and uninterrupted periods of sitting. Many strategies have been settled to break the prolonged sitting time. The most promising one seem to be the use of active workstations (standing, walking, cycling, stepping) because they reduce sedentary time at work and increase physical activity with positive effects on the global health. However inter variability in energy response have been identified during a sit to stand allocation with subject "savers" profile showing an increase in energy expenditure while others categorized as "non-savers" increased significantly their energy expenditure between sitting and standing position. As others active workstation strategies exist, this study aim to first, better characterize energy response to posture and activity allocation (15min sit-15min stand-15min sit-15min low intensity cycling), secondly to identify parameters that could explain different energy profile.

Start: May 2021
Early Detection of Vascular Dysfunction Using Biomarkers From Lagrangian Carotid Strain Imaging

The purpose of this research is assess imaging and identification of soft plaque that undergoes large deformations or strain will identify plaque vulnerable to rupture which could lead to 'silent strokes'. Validation of current study results with MRI will foster use of real-time ultrasound (US) strain imaging and strain indices as a screening tool for identifying normal human participants susceptible to increased vascular aging and developing plaque prone to rupture or micro-embolization. Current research will evaluate Lagrangian carotid strain imaging (LCSI) for prediction of vascular health on volunteers. In this study, investigators will evaluate age-related strain variations (due to plaque deposition) in the carotid artery, establishing groundwork that will help identify typical and atypical values for these indices. Investigator's hypothesis is that plaques with higher strain indices (softer plaques) are more prone to rupture than plaques with lower strain indices (stiffer) plaques, thus requiring intervention. Clinical criteria for treatment has focused primarily on the degree of stenosis. Long-term objectives are to provide non-invasive methods for screening participants at risk for vascular aging or plaque rupture in asymptomatic participants, expanding upon current criteria for risk assessments based on focal transient ischemic attack (TIA) or strokes. Variations in vessel strain have been associated with, or are precursors to, plaque deposition, vascular aging, or cerebrovascular diseases. Increased arterial strain and pressure changes have been linked to brain aging using magnetic resonance imaging (MRI) based vascular indices, and memory deficits commonly linked to Alzheimer dementia. Stiffening and thickening of the arterial walls have also been associated with cerebrovascular disease. Investigators hypothesize that strain indices as vascular biomarkers can be utilized for screening possible 'vulnerable participants' validated with MRI, with the potential ability to improve endothelial function and reverse vascular aging. Strain indices may enable differentiating study participants with vascular cognitive impairment (VCI) from other dementias. Cognitive testing is unable to make this differentiation.

Start: June 2021