Impact of one-year treatment with biotechnological drugs on work ability in patients with rheumatoid arthritis in Italy: a prospective real-life study.

OBJECTIVES: We aimed to evaluate the impact of biologic therapy on work productivity outcomes in an Italian real-life cohort of biologic-naïve patients with active rheumatoid arthritis (RA). METHODS: This observational prospective multicentre study enrolled RA patients in working age with an active disease who started their first biologic agent. Every patient completed the RA-specific Work Productivity Survey (WPS-RA) at each clinical evaluation (baseline, 6 and 12 months). The primary outcome of the study was the productivity gain at 12 months from the beginning of the biologic treatment, compared to baseline, assessed in terms of absenteeism and presenteeism reduction, both for employed and unemployed subjects. Linear regression analyses were performed to assess the impact of patient- and disease-related variables on productivity gain. RESULTS: Overall, 100 patients were enrolled and 85 completed the study. All indexes of disease activity and functional ability were significantly improved from baseline already at 6 months. At 12 months, the 55 employed subjects showed a significant reduction in the mean number of days of work missed (absenteeism) and of reduced productivity (presenteeism). A significant reduction in the mean number of days of household work missed was observed for all patients. At multivariate analysis, functional disability had a significant negative impact on all parameters of household work productivity, while the achievement of a low disease activity or remission was inversely correlated with presenteeism. CONCLUSIONS: One year of treatment with a biological drug significantly impacts on the disease activity and work ability of RA patients and allows economic gains due to productivity improvement.

Two-year retention rate of golimumab in rheumatoid arthritis, psoriatic arthritis and ankylosing spondylitis: data from the LORHEN registry.

OBJECTIVES: We aimed to provide data on golimumab real-life use in rheumatoid arthritis (RA), psoriatic arthritis (PsA) and ankylosing spondylitis (AS) from a multicentre observational registry of Northern Italy. METHODS: We extracted data of patients who started treatment with golimumab from October 2010, and who had at least one follow-up visit. Data were analysed until a maximum follow-up of 24 months. The two-year retention rate in the three diseases was assessed with Kaplan-Meier estimators. To compare crude survival between diagnoses and lines of treatment we used the log-rank test, while Cox proportional hazard models were used to adjust for confounders. RESULTS: Overall, 410 subjects were included: 180 patients with RA, 110 with PsA and 120 with AS. The two-year retention rate of patients with RA was 47.3%, 48% for PsA, and 62.8% for AS. Crude survival on treatment of patients with AS was significantly higher than that of RA patients (p=0.032), while no significant difference was found between AS and PsA and between RA and PsA. In patients with RA, subjects treated with concomitant sDMARDs showed a lower discontinuation rate than those receiving golimumab alone. The comparison between first and second line of treatment groups did not show any significant difference in mean survival time in patients with RA, PsA and AS. CONCLUSIONS: This is the first report of real-life data on two-year survival on treatment with golimumab in RA, PsA and AS. Golimumab showed a similar retention rate when given as first or second line of treatment.

Predictors of Responsiveness to Bisphosphonate Treatment in Patients with Complex Regional Pain Syndrome Type I: A Retrospective Chart Analysis.

Objective: The aim of this study was to assess whether the effectiveness of bisphosphonate infusion in patients with complex regional pain syndrome type I (CRPS-I) is influenced by variables related to patient and/or disease characteristics. Methods: This is a retrospective analysis of patients referred in the last five years to our rheumatologic tertiary care center, all fulfilling the Budapest CRPS-I diagnostic criteria and treated with three different bisphosphonate schedules (clodronate, pamidronate, and neridronate). For every subject, demographic and clinical variables were retrieved and retrospectively analyzed. We identified variables that independently influenced the therapeutic outcome of patients by a logistic regression analysis. For exploratory purposes, the effectiveness of the different bisphosphonate treatments employed was compared. Results: Among the 194 patients included in the analysis, the overall therapeutic response rate was 71.6%. Logistic regression analysis showed that the independent predictive variables for therapeutic effectiveness were disease duration (odds ratio [OR] = 0.83, 95% confidence interval [CI] = 0.72-0.96 for a one-month increment), fracture as a predisposing event (OR = 3.23, 95% CI = 1.29-8.03), and "warm" disease subtype (OR = 4.88, 95% CI = 1.57-15.20). These variables were found to influence the odds of responsiveness when analyzed together with age at onset, gender, and disease localization. No significant difference in therapeutic effectiveness was found by comparing the three different bisphosphonate schedules employed. Conclusion: Early disease, fracture as a predisposing event, and "warm" disease subtype are predictors of responsiveness to bisphosphonate treatment in patients with CRPS-I.

Current approach to the management of psoriatic arthritis according to a sample of Italian rheumatologists.

OBJECTIVES: The purpose of this study was to have an overview of the current approach to psoriatic arthritis (PsA) by a group of Italian rheumatologists. METHODS: Rheumatologists from all around Italy were asked to participate in a survey to give their opinion on a number of statements made by a panel of rheumatologists who are experts in PsA. The survey was conducted through two rounds using a Delphi-like method. The two rounds yielded a consensus on the management of PsA. RESULTS: Fifty rheumatologist from 50 rheumatology centres participated in the survey. Of the 117 proposed statements, only 10 did not reach the 66% concordance threshold. The main results of the survey were that diagnosis of PsA should be made using both the CASPAR criteria and clinical judgment, that all of the features of the psoriatic disease are relevant in the assessment and therapy of PsA, that treatment recommendations are taken into account, that all of the available biological agents may be used in bio-naïve patients, that anti-drug antibody testing is still not used in daily practice, that both switching or swapping are useful options in the case of bio-failure because of lack or loss of efficacy, and that swapping is considered the best choice in the case of bio-failure due to adverse events. CONCLUSIONS: The results of this survey showed that a comprehensive evaluation of the patient and a therapy choice based on both patient clinical features and evidence of drug efficacy and safety are considered the current best of care for PsA patients.

Adherence to current recommendations on the use of methotrexate in rheumatoid arthritis in Italy: results from the MARI study.

OBJECTIVES: The aim of this study was to assess how the management of rheumatoid arthritis (RA) with methotrexate (MTX) in Italy is adherent to current national recommendations. METHODS: We performed a cross-sectional and retrospective analysis of data collected from the MARI study, a multicentre survey on Italian patients with RA on treatment with MTX for at least 12 months. Retrospective data included patient's clinical history, previous treatment with MTX, screening tests performed before MTX prescription. Cross-sectional data were collected about current treatment with MTX, concomitant medications, and disease activity. Each proposition of the 2013 Italian recommendations on the use of MTX in RA was reformulated in terms of audit criteria, and adherence to provided indications was evaluated for every patient. RESULTS: Among the 1336 included patients, less than 40% had started treatment with MTX within 3-6 months from the diagnosis and nearly 30% of them were prescribed with an initial dose of MTX between 12.5 and 15 mg/week. Screening for HBV and HCV infection as well as chest x-ray was performed in a proportion of patients around 60% and more than 90% of them underwent lab tests before MTX prescription and regularly throughout the treatment. Folic acid supplementation was given at recommended dosages in a high proportion of patients. CONCLUSIONS: Our survey showed a good adherence of Italian rheumatologists to recommendations regarding safety issues with MTX in RA, but a suboptimal approach in terms of time and dosage of the treatment in the early phases of the disease.

Process development of a human recombinant diabody expressed in E. coli: engagement of CD99-induced apoptosis for target therapy in Ewing's sarcoma.

Ewing's sarcoma (EWS) is the second most common primary bone tumor in pediatric patients characterized by over expression of CD99. Current management consists in extensive chemotherapy in addition to surgical resection and/or radiation. Recent improvements in treatment are still overshadowed by severe side effects such as toxicity and risk of secondary malignancies; therefore, more effective strategies are urgently needed. The goal of this work was to develop a rapid, inexpensive, and "up-scalable" process of a novel human bivalent single-chain fragment variable diabody (C7 dAbd) directed against CD99, as a new therapeutic approach for EWS. We first investigated different Escherichia coli constructs of C7 dAbd in small-scale studies. Starting from 60 % soluble fraction, we obtained a yield of 25 mg C7 dAbd per liter of bacterial culture with the construct containing pelB signal sequence. In contrast, a low recovery of C7 dAbd was achieved starting from periplasmic inclusion bodies. In order to maximize the yield of C7 dAbd, large-scale fermentation was optimized. We obtained from 75 % soluble fraction 35 mg C7 dAbd per L of cell culture grown in a synthetic media containing 3 g/L of vegetable peptone and 1 g/L of yeast extract. Furthermore, we demonstrated the better efficacy of the cell lysis by homogenization versus periplasmic extraction, in reducing endotoxin level of the C7 dAbd. For gram-scale purification, a direct aligned two-step chromatography cascade based on binding selectivity was developed. Finally, we recovered C7 dAbd with low residual process-related impurities, excellent reactivity, and apoptotic ability against EWS cells.

Psoriatic Disease: Update on Traditional Disease-modifying Antirheumatic Drugs.

We present an update on the effects of methotrexate (MTX), sulfasalazine (SSZ), leflunomide (LEF), and cyclosporine (CSA) in psoriatic arthritis (PsA) by reviewing data published from January 2010 to June 2014. The most relevant study on MTX, the Methotrexate In Psoriatic Arthritis (MIPA) trial, did not show a significant difference between this drug and placebo in improving peripheral synovitis. The trial, however, had several limitations. A cohort study on a small number of patients found that MTX does not inhibit radiographic progression. In a large observational study, 86% of LEF-treated patients met PsA Response Criteria (PsARC) at Week 24. No studies of sufficient relevance on SSZ were published in the examined time frame. In an open-label trial, CSA alone was compared to adalimumab (ADA) alone and to the combination ADA/CSA. The ADA arms showed a significantly higher response rate, but as many as 65% of CSA-treated patients were PsARC responders at Month 12. No relevant data on the effects of these 4 drugs on psoriatic enthesitis, dactylitis, or spondylitis have recently been published, and no new safety signals have been reported. Observational data from 2 registers suggest that concomitant MTX increases the retention rate of tumor necrosis factor-α inhibitors. The studies published in the examined time frame confirm that MTX, SSZ, LEF, and CSA have moderate symptom-modifying effect on psoriatic synovitis, and probably little effect on the other manifestations of PsA.

Expression levels of insulin receptor substrate-1 modulate the osteoblastic differentiation of mesenchymal stem cells and osteosarcoma cells.

The insulin-like growth factor-1 system, including its critical mediator insulin receptor substrate-1 (IRS-1), is involved in regulating osteosarcoma (OS) cell proliferation or differentiation. The aim of this study is to define the role of IRS-1 in OS cells by assessing the contribution of IRS-1 in the differentiation of human and murine OS cell lines and mouse mesenchymal stem cells (MSCs) and found that the basal level of IRS-1 is important for the initiation of differentiation. Both down-regulation and over-expression of IRS-1 inhibited osteoblastic differentiation. In vivo studies showed that OS cells over-expressing IRS-1 have increased metastatic potential and tumor growth. The proteasome inhibitor MG-132 led to an increase in IRS-1 protein level that inhibited osteoblastic differentiation, suggesting a role for proteasomal regulation in maintaining the appropriate expression level of IRS-1. Thus, precise regulation of IRS-1 expression level is critical for determining the differentiating capacity of MSCs and OS cells, and that derangement of IRS-1 levels can be a critical step in OS transformation.

An aza-macrocycle containing maltolic side-arms (maltonis) as potential drug against human pediatric sarcomas.

BACKGROUND: Identification of new drugs against paediatric sarcomas represents an urgent clinical need that mainly relies on public investments due to the rarity of these diseases. In this paper we evaluated the in vitro and in vivo efficacy of a new maltol derived molecule (maltonis), belonging to the family of molecules named hydroxypyrones. METHODS: Maltonis was screened for its ability to induce structural alteration of DNA molecules in comparison to another maltolic molecule (malten). In vitro antitumour efficacy was tested using a panel of sarcoma cell lines, representative of Ewing sarcoma, osteosarcoma and rhabdomyosarcoma, the three most common paediatric sarcomas, and in normal human mesenchymal primary cell cultures. In vivo efficacy was tested against TC-71 Ewing sarcoma xenografts. RESULTS: Maltonis, a soluble maltol-derived synthetic molecule, was able to alter the DNA structure, inhibit proliferation and induce apoptotic cell death in paediatric sarcoma cells, either sensitive or resistant to some conventional chemotherapeutic drugs, such as doxorubicin and cisplatin. In addition, maltonis was able to induce: i) p21, p15 and Gadd45a mRNA upregulation; ii) Bcl-2, survivin, CDK6 and CDK8 down-regulation; iii) formation of γ-H2AX nuclear foci; iv) cleavage of PARP and Caspase 3. Two independent in vivo experiments demonstrated the tolerability and efficacy of maltonis in the inhibition of tumour growth. Finally maltonis was not extruded by ABCB1, one of the major determinants of chemotherapy failure, nor appeared to be a substrate of the glutathione-related detoxification system. CONCLUSIONS: Considering that treatment of poorly responsive patients still suffers for the paucity of agents able to revert chemoresistance, maltonis may be considered for the future development of new therapeutic approaches for refractory metastatic patients.

IL-1 Family Members in Bone Sarcomas.

IL-1 family members have multiple pleiotropic functions affecting various tissues and cells, including the regulation of the immune response, hematopoietic homeostasis, bone remodeling, neuronal physiology, and synaptic plasticity. Many of these activities are involved in various pathological processes and immunological disorders, including tumor initiation and progression. Indeed, IL-1 family members have been described to contribute to shaping the tumor microenvironment (TME), determining immune evasion and drug resistance, and to sustain tumor aggressiveness and metastasis. This review addresses the role of IL-1 family members in bone sarcomas, particularly the highly metastatic osteosarcoma (OS) and Ewing sarcoma (EWS), and discusses the IL-1-family-related mechanisms that play a role in bone metastasis development. We also consider the therapeutic implications of targeting IL-1 family members, which have been proposed as (i) relevant targets for anti-tumor and anti-metastatic drugs; (ii) immune checkpoints for immune suppression; and (iii) potential antigens for immunotherapy.

Engagement of CD99 Activates Distinct Programs in Ewing Sarcoma and Macrophages.

Ewing sarcoma (EWS) is the second most common pediatric bone tumor. The EWS tumor microenvironment is largely recognized as immune-cold, with macrophages being the most abundant immune cells and their presence associated with worse patient prognosis. Expression of CD99 is a hallmark of EWS cells, and its targeting induces inhibition of EWS tumor growth through a poorly understood mechanism. In this study, we analyzed CD99 expression and functions on macrophages and investigated whether the concomitant targeting of CD99 on both tumor and macrophages could explain the inhibitory effect of this approach against EWS. Targeting CD99 on EWS cells downregulated expression of the "don't eat-me" CD47 molecule but increased levels of the "eat-me" phosphatidyl serine and calreticulin molecules on the outer leaflet of the tumor cell membrane, triggering phagocytosis and digestion of EWS cells by macrophages. In addition, CD99 ligation induced reprogramming of undifferentiated M0 macrophages and M2-like macrophages toward the inflammatory M1-like phenotype. These events resulted in the inhibition of EWS tumor growth. Thus, this study reveals what we believe to be a previously unrecognized function of CD99, which engenders a virtuous circle that delivers intrinsic cell death signals to EWS cells, favors tumor cell phagocytosis by macrophages, and promotes the expression of various molecules and cytokines, which are pro-inflammatory and usually associated with tumor regression. This raises the possibility that CD99 may be involved in boosting the antitumor activity of macrophages.

Payload-delivering engineered γδ T cells display enhanced cytotoxicity, persistence, and efficacy in preclinical models of osteosarcoma.

T cell-based cancer immunotherapy has typically relied on membrane-bound cytotoxicity enhancers such as chimeric antigen receptors expressed in autologous αß T cells. These approaches are limited by tonic signaling of synthetic constructs and costs associated with manufacturing. γδ T cells are an emerging alternative for cellular therapy, having innate antitumor activity, potent antibody-dependent cellular cytotoxicity, and minimal alloreactivity. We present an immunotherapeutic platform technology built around the innate properties of the Vγ9Vδ2 T cell, harnessing specific characteristics of this cell type and offering an allocompatible cellular therapy that recruits bystander immunity. We engineered γδ T cells to secrete synthetic tumor-targeting opsonins in the form of an scFv-Fc fusion protein and a mitogenic IL-15Rα-IL-15 fusion protein (stIL15). Using GD2 as a model antigen, we show that GD2-specific opsonin-secreting Vγ9Vδ2 T cells (stIL15-OPS-γδ T cells) have enhanced cytotoxicity and promote bystander activity of other lymphoid and myeloid cells. Secretion of stIL-15 abrogated the need for exogenous cytokine supplementation and further mediated activation of bystander natural killer cells. Compared with unmodified γδ T cells, stIL15-OPS-γδ T cells exhibited superior in vivo control of subcutaneous tumors and persistence in the blood. Moreover, stIL15-OPS-γδ T cells were efficacious against patient-derived osteosarcomas in animal models and in vitro, where efficacy could be boosted with the addition of zoledronic acid. Together, the data identify stIL15-OPS-γδ T cells as a candidate allogeneic cell therapy platform combining direct cytolysis with bystander activation to promote tumor control.

Does early arthritis clinic organisation improve outcomes? What evidence is there? A systematic review.

OBJECTIVES: To perform a systematic review aimed to identify studies addressing the effect of the establishment of a structured organisation programme, named early arthritis clinic (EAC), finalized to manage patients with early arthritis (EA) or suspected early rheumatoid arthritis (ERA). METHODS: A literature search was performed until May 2012 using electronic databases. Additional information was obtained through a hand and grey literature search. Primary and secondary outcomes and eligibility criteria have been defined. RESULTS: The search provided a total of 3367 citations and, after the selection process, 11 non randomised controlled trials were selected, including a total of 8240 participants. The efficacy of EAC did clearly emerge with regard to reduction of the referral lag time and of the time to treatment (secondary outcomes). Only two studies met the primary outcomes: one study demonstrated that the EAC contributed to reducing disease activity and radiographic progression but not functional disability, while another reported a reduction of pain after a 6-12-month period of follow-up. CONCLUSIONS: Whether the establishment of EAC would improve the prognosis of EA in terms of primary outcomes such as clinical, functional and radiologic progression compared to patients managed outside from EAC does appear a still poorly addressed issue in the literature, which should be recognised as an urgent unmet need by the rheumatology community to gain more evidence-based information on this topic.

miR-34a predicts survival of Ewing's sarcoma patients and directly influences cell chemo-sensitivity and malignancy.

Identification of factors to detect chemotherapy-resistant tumours at diagnosis is a first priority for risk-adapted therapy in the oncology of children and young adults, where more individualized, effective, and less toxic treatments are highly desirable. In this study, we analysed the miRNAs discriminating Ewing's sarcoma (EWS) patients with different clinical outcomes in order to identify new indicators of prognosis. miRNA expression was investigated in 49 primary EWSs by using the Agilent human miRNA microarray v.2 and/or qRT-PCR. Statistical power of the samples studied for miRNA expression was verified, indicating adequate sample size. Microarray analysis defined a signature of five miRNAs (miR-34a, miR-23a, miR-92a, miR-490-3p, and miR-130b) as an independent predictor of risk for disease progression and survival. Validation analysis in the extended sample set indicated that both miR-34a and miR-490-3p achieved sufficient statistical power to predict prognosis. Results were particularly robust for miR-34a, which appeared associated with either event-free or overall survival and emerged as a significant predictor also after multivariate analysis. Patients with the highest expression of miR-34a did not experience adverse events in 5 years; in contrast, patients with the lowest expression recurred within 2 years. High expression of miR34a can be detected also in paraffin-embedded tissues by in situ hybridization, thus contributing to an easy routine evaluation of this miRNA. Functional analysis of miR-34a in EWS cell lines indicated that when miR-34a expression was enforced, cells were less proliferative, less malignant, and sensitized to doxorubicin and vincristine. Expression of miR-34a could be increased in p53wt cells by treatment with nutlin-3a. Accordingly, nutlin-3a synergizes with doxorubicin. Overall, our data indicate that miR-34a expression is a strong predictor of outcome in EWS. Restoration of miR-34a activity may be useful to decrease malignancy and increase tumour sensitivity to current drugs, so sparing excessive long-term toxicity to EWS patients.

Innovative Breakthroughs for the Treatment of Advanced and Metastatic Synovial Sarcoma.

Synovial sarcoma (SyS) is a rare aggressive soft tissue sarcoma carrying the chromosomal translocation t(X;18), encoding the fusion transcript SS18::SSX. The fusion oncoprotein interacts with both BAF enhancer complexes and polycomb repressor complexes, resulting in genome-wide epigenetic perturbations and a unique altered genetic signature. Over 80% of the patients are initially diagnosed with localized disease and have a 5-year survival rate of 70-80%, but metastatic relapse occurs in 50% of the cases. Advanced, unresectable, or metastatic disease has a 5-year survival rate below 10%, representing a critical issue. This review summarizes the molecular mechanisms behind SyS and illustrates current treatments in front line, second line, and beyond settings. We analyze the use of immune check point inhibitors (ICI) in SyS that do not behave as an ICI-sensitive tumor, claiming the need for predictive genetic signatures and tumor immune microenvironment biomarkers. We highlight the clinical translation of innovative technologies, such as proteolysis targeting chimera (PROTAC) protein degraders or adoptive transfer of engineered immune cells. Adoptive cell transfer of engineered T-cell receptor cells targeting selected cancer/testis antigens has shown promising results against metastatic SyS in early clinical trials and further improvements are awaited from refinements involving immune cell engineering and tumor immune microenvironment enhancement.

Safety of Janus Kinase Inhibitors: A Real-World Multicenter Retrospective Cohort Study.

OBJECTIVE: Oral Janus kinase inhibitors (JAKis) represent an effective strategy for rheumatoid arthritis (RA) treatment. A previous study supported that tofacitinib (TOF) is associated with higher incidence of cardiovascular (CV) and neoplastic events compared to tumor necrosis factor inhibitors. Given the apparent discrepancy between these data and real-world experience, we aimed to investigate the safety and efficacy of the available JAKis in a multicenter cohort. METHODS: We retrospectively evaluated patients with RA who ever received 1 JAKi (TOF, baricitinib [BAR], upadactinib [UPA], filgotinib [FIL]) from 4 tertiary care centers in Milan, Italy. Outcomes related to JAKi safety were recorded, particularly major CV events as well as adverse events of special interest (AESIs), which included serious infections, opportunistic infections, venous thromboembolism, herpes zoster infections, liver injury, malignancies, and deaths; retention rates were also calculated. Further analyses included patients fulfilling the risk factors suggested to influence TOF safety. RESULTS: Six hundred eighty-five patients were included and received BAR (48%), TOF (31%), UPA (14%), or FIL (7%) as first-line innovative treatment prior to a biologic. Of a total of 1137 patient-years of observation, we recorded 1 stroke and 123 (18%) AESIs, including 3 deaths, all a result of severe infections. Among patients with a higher CV risk, we observed a higher frequency of AESIs (23%). CONCLUSION: Our real-world data confirm that JAKis are effective and carry a low risk of AESIs, especially in patients who do not display CV risk factors at baseline. Our study could not identify differences between JAKis. Different safety profiles should be defined in larger prospective cohorts.

Determinants and effects of vitamin D supplementation on serum 25-hydroxy-vitamin D levels in patients with rheumatoid arthritis.

OBJECTIVES: Osteoporosis (OP) and increased risk of fracture are relevant features in patients with rheumatoid arthritis (RA). Low levels of serum vitamin D are frequently reported and correlate with a higher RA activity. This study evaluated factors related with the prescription of vitamin D supplements in RA patients and variables influencing the achievement of adequate vitamin D levels. METHODS: Study population was made up by 1168 consecutive RA patients from 22 Italian rheumatology centers. Demographic and clinical variables data were collected and 25OH serum vitamin D was measured in all patients. Insufficient serum 25OH vitamin D levels were defined as values lower than 20 ng/mL. RESULTS: The majority of patients (56.0%) was not taking vitamin D supplements. Among the 514 supplemented patients, 196 (38.1%) were taking insufficient dosages (≤440 IU/day). Variables related with the prescription of supplements were older age, female sex, previous bone density assessment and OP diagnosis. Among the 318 patients using daily supplements ≥800 IU, 88 patients (27.7%) did not reach adequate levels of vitamin D. In these patients a higher HAQ score (OR for 1 point=1.62, 95% CI: 1.06-2.49; p=0.03) and poor sun exposure (OR=2.38, 95% CI: 1.05-5.55; p=0.04) were predictors of vitamin D insufficiency. CONCLUSIONS: Vitamin D deficiency is common in patients with RA, even in patients who are regularly using supplements. Vitamin D supplementation is often ineffective even at the recommended dose of 800 IU/day in more disabled patients.

Entheseal power Doppler ultrasonography: a comparison of psoriatic arthritis and fibromyalgia.

OBJECTIVE: To compare the power Doppler ultrasonography (PDUS) pictures of peripheral entheses in patients with psoriatic arthritis (PsA) and fibromyalgia (FM). METHODS: Thirty patients with PsA and 30 with FM participating in a study aimed at identifying the clinical features that distinguish the 2 conditions underwent the PDUS assessment of 14 major peripheral entheses. All of the detected entheseal changes were recorded and scored, and the data were statistically analyzed by means of univariate analysis and receiver-operating characteristic curves. RESULTS: Four hundred twenty entheseal sites were assessed in each group of patients. At least 1 lesion was detected in each of the patients with PsA and in 80% of the patients with FM (p = 0.01), but inflammatory changes were present in respectively 70% and 23% (p = 0.001). A cutoff point of ≥ 3 involved sites had the greatest discriminating power in the patients with PsA, who were the only patients with bony erosions. PDUS signs of plantar fascia enthesopathy and Achilles tendon inflammation were highly specific of PsA. CONCLUSION: PDUS assessment of the peripheral entheses distinguishes patients with PsA and patients with FM in terms of the number and distribution of the involved sites, and the presence of inflammatory changes.

A 3D Collagen-Based Bioprinted Model to Study Osteosarcoma Invasiveness and Drug Response.

The biological and therapeutic limits of traditional 2D culture models, which only partially mimic the complexity of cancer, have recently emerged. In this study, we used a 3D bioprinting platform to process a collagen-based hydrogel with embedded osteosarcoma (OS) cells. The human OS U-2 OS cell line and its resistant variant (U-2OS/CDDP 1 µg) were considered. The fabrication parameters were optimized to obtain 3D printed constructs with overall morphology and internal microarchitecture that accurately match the theoretical design, in a reproducible and stable process. The biocompatibility of the 3D bioprinting process and the chosen collagen bioink in supporting OS cell viability and metabolism was confirmed through multiple assays at short- (day 3) and long- (day 10) term follow-ups. In addition, we tested how the 3D collagen-based bioink affects the tumor cell invasive capabilities and chemosensitivity to cisplatin (CDDP). Overall, we developed a new 3D culture model of OS cells that is easy to set up, allows reproducible results, and better mirrors malignant features of OS than flat conditions, thus representing a promising tool for drug screening and OS cell biology research.

Novel Targeting of DNA Methyltransferase Activity Inhibits Ewing Sarcoma Cell Proliferation and Enhances Tumor Cell Sensitivity to DNA Damaging Drugs by Activating the DNA Damage Response.

DNA methylation is an important component of the epigenetic machinery that regulates the malignancy of Ewing sarcoma (EWS), the second most common primary bone tumor in children and adolescents. Coordination of DNA methylation and DNA replication is critical for maintaining epigenetic programming and the DNMT1 enzyme has been demonstrated to have an important role in both maintaining the epigenome and controlling cell cycle. Here, we showed that the novel nonnucleoside DNMT inhibitor (DNMTi) MC3343 induces a specific depletion of DNMT1 and affects EWS tumor proliferation through a mechanism that is independent on DNA methylation. Depletion of DNMT1 causes perturbation of the cell cycle, with an accumulation of cells in the G1 phase, and DNA damage, as revealed by the induction of γH2AX foci. These effects elicited activation of p53-dependent signaling and apoptosis in p53wt cells, while in p53 mutated cells, persistent micronuclei and increased DNA instability was observed. Treatment with MC3343 potentiates the efficacy of DNA damaging agents such as doxorubicin and PARP-inhibitors (PARPi). This effect correlates with increased DNA damage and synergistic tumor cytotoxicity, supporting the use of the DNMTi MC3343 as an adjuvant agent in treating EWS.