Publications by authors named "Ledda S"

Background: Monitoring biologic drug therapy during pregnancy in women with immune-mediated inflammatory diseases (IMIDs) is crucial to ensure treatments align with evidence-based practices.

Research Design And Methods: A retrospective cohort study based on healthcare claims data from eight Italian regions was conducted, analyzing deliveries between 2009 and 2021. The study included women receiving biologic drugs within nine months before their last menstruation.

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Objectives: To investigate the use of maintenance immunosuppressive treatments following liver transplantation and to compare their risk-benefit profiles in clinical practice.

Design: Retrospective multicentrer cohort study.

Setting: Four Italian regions (Lombardy, Veneto, Lazio, Sardinia).

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Background: Switch patterns among different biologics and from originators to biosimilars (and vice versa) can be complex in patients with psoriasis (PsO) and psoriatic arthritis (PsA).

Objective: The aim of this study was to describe switching patterns of biological drugs in PsO/PsA patients and to explore predictors of multiple switches and switch-back.

Research Design And Methods: A large-scale retrospective cohort study was conducted using the Italian VALORE database.

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Purpose: This study evaluates the use, benefit-risk profile, and economic impact of generic immunosuppressants (tacrolimus-TAC, cyclosporine-CsA, and mycophenolate-MYC) in kidney and liver transplant recipients compared to brand-name drugs.

Patients And Methods: A retrospective multicentre observational study, involving four Italian regions, was conducted based on the national transplant Information system and regional healthcare claims data. The analysis focused on incident patients who received kidney and liver transplants between 2013 and 2019 and evaluated the use of generic of CsA, TAC, and MYC during the 30-day period following discharge.

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Article Synopsis
  • Kidney transplant maintenance therapy usually includes calcineurin inhibitors like tacrolimus or cyclosporine, often paired with mycophenolate or mTOR inhibitors, and sometimes corticosteroids.
  • A study from Italy analyzed the risk and benefits of various immunosuppressive regimens in kidney transplant patients between 2009 and 2019, focusing on the safety and effectiveness of tacrolimus versus cyclosporine and comparing mTORi with mycophenolate.
  • Results indicated that tacrolimus therapy had lower risks of graft rejection and severe infections than cyclosporine, despite a higher incidence of diabetes; mTORi showed similar efficacy to mycophenolate, suggesting it could be a viable alternative.
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Background: Very scanty evidence is available on factors influencing the choice of immunosuppressive drug therapy after kidney transplantation.

Methods: An Italian multiregional real-world study was conducted integrating national transplant information system and claims data. All patients undergoing kidney transplantation for the first time during 2009-2019 (incident patients) were considered.

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Mammalian embryogenesis is characterized by complex interactions between embryonic and extra-embryonic tissues that coordinate morphogenesis, coupling bio-mechanical and bio-chemical cues, to regulate gene expression and influence cell fate. Deciphering such mechanisms is essential to understand early embryogenesis, as well as to harness differentiation disorders. Currently, several early developmental events remain unclear, mainly due to ethical and technical limitations related to the use of natural embryos.

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This study investigated the pathogenic potential of Pseudomonas protegens on mosquito larvae of the two species Culex pipiens and Aedes albopictus, representing major threats for disease transmission in the Mediterranean area and worldwide. The bacterium achieved to kill over 90% of the mosquito larvae within 72 h after exposition to a bacterial concentration of 100 million CFU/ml. These lethal effects were concentration dependent and a significantly higher susceptibility was associated with younger larvae of both mosquito species.

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Purpose: This study is to develop a new protocol that combines the use of epigenetic cues and mechanical stimuli to assemble 3D spherical structures, arbitrarily defined "epiBlastoids," whose phenotype is remarkably similar to natural embryos.

Methods: A 3-step approach is used to generate epiBlastoids. In the first step, adult dermal fibroblasts are converted into trophoblast (TR)-like cells, combining the use of 5-azacytidine, to erase the original phenotype, with an ad hoc induction protocol, to drive cells towards TR lineage.

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Increased knowledge of the developmental processes during gestation could provide valuable information on potential alterations in embryonic/fetal development. We examined the development of ovine conceptus between the 20th and 70th day of gestation with three convergent analyses: (1) uterus ultrasound examination and measurement (eco) of crown-rump length (CRL) and biparietal diameter (BPD) of the conceptus; (2) direct measurement (vivo) of CRL and BPD of the conceptus outside the uterus (3) osteo-cartilage dynamics during development by differential staining. No significant differences were observed between eco and vivo measurements for CRL and BPD in all examined concepti.

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Background: In immunosuppression after transplantation, several multi-drug approaches are used, involving calcineurin inhibitors (), antimetabolites (), mammalian target of rapamycin inhibitors (), and corticosteroids. However, data on immunosuppressive therapy by organ and its space-time variability are lacking.

Methods: An Italian multicentre observational cohort study was conducted using health information systems.

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Bluetongue disease (BT), caused by Bluetongue virus (BTV), infects wild and domestic ruminants, causing severe economic damage in the cattle and sheep industry. Proven vectors of BTV are biting midges belonging to the Culicoides genus, but other arthropods are considered potential vectors, such as ticks, mosquitoes, wingless flies, and sand flies. The present study represents the first attempt to evaluate the vectorial capacity of Culex pipiens and Aedes albopictus for BTV.

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The goal of post-transplant immunosuppressive drug therapy is to prevent organ rejection while minimizing drug toxicities. In clinical practice, a multidrug approach is commonly used and involves drugs with different mechanisms of action, including calcineurin inhibitors (CNI) (tacrolimus or cyclosporine), antimetabolite (antimet) (mycophenolate or azathioprine), inhibitors of mechanistic target of rapamycin (mTOR) (sirolimus or everolimus), and/or steroids. Although evidence based on several randomized clinical trials is available, the optimal immunosuppressive therapy has not been established and may vary among organ transplant settings.

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Glioblastoma is a brain tumour frequently used as an experimental model to exploit innovative therapeutic approaches due to its high lethality and refractoriness to therapies. Part of these innovative anticancer therapies address cytoskeletal microtubules (MTs) since specific tubulin post-translational modifications (PTMs) are considered markers of tumour plasticity. In vitro studies, which traditionally employ two-dimensional (2D) culture systems, are now being replaced by three-dimensional (3D) systems that more closely mimic in vivo physiological conditions and allow a better understanding of the signalling between cells.

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To date, large-scale use of multiple ovulation and embryo transfer (MOET) programmes in ovine species is limited due to unpredictable results and high costs of hormonal stimulation and treatment. Therefore, even if considered reliable, they are not fully applicable in large-scale systems. More recently, the new prospects offered by in vitro embryo production (IVEP) through collection of oocytes post-mortem or by repeated ovum pick-up from live females suggested an alternative to MOET programmes and may be more extensively used, moving from the exclusive research in the laboratory to field application.

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Bioimaging supported by nanoparticles requires low cost, highly emissive and photostable systems with low cytotoxicity. Carbon dots (C-dots) offer a possible solution, even if controlling their properties is not always straightforward, not to mention their potentially simple synthesis and the fact that they do not exhibit long-term photostability in general. In the present work, we synthesized two C-dots starting from citric acid and tris (hydroxymethyl)-aminomethane (tris) or arginine methyl ester dihydrochloride.

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The age-associated decline in female fertility is largely ascribable to a decrease in oocyte quality. This phenomenon is multifaceted and influenced by numerous interconnected maternal and environmental factors. An increase in the rate of meiotic errors is the major cause of the decline in oocyte developmental competence.

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Cryopreservation is routinely used to preserve cells and tissues; however, long time storage brings many inconveniences including the use of liquid nitrogen. Freeze-drying could enable higher shelf-life stability at ambient temperatures and facilitate transport and storage. Currently, the possibility to freeze-dry reproductive tissues maintaining vitality and functions is still under optimization.

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In vitro oocyte maturation (IVM) is a well-established technique. Despite the high IVM rates obtained in most mammalian species, the developmental competence of IVM oocytes is suboptimal. The aim of this work was to evaluate the potential beneficial effects of a liquid marble microbioreactor (LM) as a 3D culture system to mature in vitro prepubertal ovine oocytes, as models of oocytes with intrinsic low competence.

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Intra-follicular oocyte transfer (IFOT) is a promising and innovative technique for in vivo embryo production previously described for equines and bovines. The aim of this study was to assess the feasibility of IFOT in the ovine species. Two preliminary in vivo and in vitro trials were performed to test the optimal procedures and timing for IFOT.

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Article Synopsis
  • Biological drugs significantly enhance the treatment of immune-mediated inflammatory diseases (IMIDs), but they carry risks such as infections and cancer in real-world scenarios.
  • This study aimed to assess the effectiveness of a large Italian multi-database system for tracking the safety of biological drugs and their biosimilars after market release.
  • Analyzing data from 13 regional claims databases, researchers found a threefold increase in the prevalence of biological drug users from 2010 to 2019, identifying over 143,000 users with substantial cumulative exposure to these medications.
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Since its recent discovery, the subcortical maternal complex (SCMC) is emerging as a maternally inherited and crucial biological structure for the initial stages of embryogenesis in mammals. Uniquely expressed in oocytes and preimplantation embryos, where it localizes to the cell subcortex, this multiprotein complex is essential for early embryo development in the mouse and is functionally conserved across mammalian species, including humans. The complex has been linked to key processes leading the transition from oocyte to embryo, including meiotic spindle formation and positioning, regulation of translation, organelle redistribution, and epigenetic reprogramming.

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