University of Milan

About: University of Milan is a education organization based out in Milan, Italy. It is known for research contribution in the topics: Population & Transplantation. The organization has 58413 authors who have published 139784 publications receiving 4636354 citations. The organization is also known as: Università degli Studi di Milano & Statale.

Role of tumor-associated macrophages in tumor progression and invasion.

Abstract: Tumor-Associated Macrophages (TAM) represent the major inflammatory component of the stroma of many tumors, able to affect different aspects of the neoplastic tissue. Many observations indicate that TAM express several M2-associated protumoral functions, including promotion of angiogenesis, matrix remodelling and suppression of adaptive immunity. The protumoral role of TAM in cancer is further supported by clinical studies that found a correlation between the high macrophage content of tumors and poor patient prognosis and by evidence showing that long-term use of non-steroidal anti-inflammatory drugs reduces the risk of several cancers. Here, we discuss evidence supporting the view that TAM represent a unique and distinct M2-skewed myeloid population and a potential target of anti-cancer therapy.

Early T-cell precursor leukaemia: a subtype of very high-risk acute lymphoblastic leukaemia

Abstract: Summary Background About a fifth of children with acute T-lymphoblastic leukaemia (T-ALL) succumb to the disease, suggesting an unrecognised biological heterogeneity that might contribute to drug resistance. We postulated that T-ALL originating from early T-cell precursors (ETPs), a recently defined subset of thymocytes that retain stem-cell-like features, would respond poorly to lymphoid-cell-directed therapy. We studied leukaemic cells, collected at diagnosis, to identify cases with ETP features and determine their clinical outcome. Methods Leukaemic cells from 239 patients with T-ALL enrolled at St Jude Children's Research Hospital (n=139) and in the Italian national study Associazione Italiana Ematologia Oncologia Pediatrica (AIEOP) ALL-2000 (n=100) were assessed by gene-expression profiling, flow cytometry, and single nucleotide polymorphism array analysis. Probabilities of survival and treatment failure were calculated for subgroups considered to have ETP-ALL or typical T-ALL. Findings 30 patients (12·6%) had leukaemic lymphoblasts with an ETP-related gene-expression signature or its associated distinctive immunophenotype (CD1a − , CD8 − , CD5 weak with stem-cell or myeloid markers). Cases of ETP-ALL showed increased genomic instability, in terms of number and size of gene lesions, compared with those with typical T-ALL. Patients with this form of leukaemia had high risk of remission failure or haematological relapse (72% [95% CI 40–100] at 10 years vs 10% [4–16] at 10 years for patients with typical T-ALL treated at St Jude Children's Research Hospital; and 57% [25–89] at 2 years vs 14% [6–22] at 2 years for patients treated in the AIEOP trial). Interpretation ETP-ALL is a distinct, previously unrecognised, pathobiological entity that confers a poor prognosis with use of standard intensive chemotherapy. Its early recognition, by use of the gene expression and immunophenotypic criteria outlined here, is essential for the development of an effective clinical management strategy. Funding US National Cancer Institute, Cariplo Foundation, Citta della Speranza Foundation, Italian Association for Cancer Research (AIRC), Italian Ministry for University and Research, and American Lebanese Syrian Associated Charities (ALSAC).

Hepatocellular carcinoma in Italian patients with cirrhosis.

Abstract: Background and Methods. Patients with cirrhosis of the liver are recognized as being at risk for hepatocellular carcinoma. The magnitude of the risk, the natural history of this disease, and the possibilities for detecting potentially curable tumors in patients in the Western world are unknown. To address these questions, we examined 447 Italian patients with well-compensated cirrhosis (which was of viral origin in 62 percent of them) from 1985 through 1990, performing serum alpha-fetoprotein assays and real-time ultrasonography every 3 to 12 months. Results. Hepatocellular carcinoma was found in 30 patients (7 percent) at base line and in another 29 patients (7 percent of 417 patients free of tumor at base line) during follow-up periods averaging 33 months (range, 1 to 48). The cumulative hazard of the development of hepatocellular carcinoma during follow-up was higher among patients with persistently elevated serum alpha-fetoprotein levels (12 with tumors among 42 with such levels) than among t...

Correlation of the highest-energy cosmic rays with nearby extragalactic objects.

Abstract: Using data collected at the Pierre Auger Observatory during the past 3.7 years, we demonstrate that there is a correlation between the arrival directions of cosmic rays with energy above {approx} 6 x 10{sup 19} eV and the positions of active galactic nuclei (AGN) lying within {approx} 75 Mpc. We reject the hypothesis of an isotropic distribution of these cosmic rays at over 99% confidence level from a prescribed a priori test. The correlation we observe is compatible with the hypothesis that the highest energy particles originate from nearby extragalactic sources whose flux has not been significantly reduced by interaction with the cosmic background radiation. AGN or objects having a similar spatial distribution are possible sources.

Pressure-volume curve of total respiratory system in acute respiratory failure. Computed tomographic scan study.

Abstract: To investigate the relationship between lung anatomy and pulmonary mechanics in acute respiratory failure (ARF), 20 patients with ARF underwent computerized tomography (CT) at 3 levels of positive end-expiratory pressure (PEEP) (5, 10, and 15 cm H2O). The static pressure-volume curve of the total respiratory system and the lung volumes (helium dilution method) were also measured. By knowing the lung volumes and analyzing the CT number frequency distribution, a quantitative estimate of normally aerated, poorly aerated, and nonaerated lung tissue was obtained at each level of PEEP. The recruitment was defined as the percent increase of normally aerated tissue from 5 to 15 cm H2O. We found that the different compliances (starting compliance, inflation compliance, and deflation compliance) were correlated only with the amount of normally aerated tissue present in the range of pressures explored by a given compliance (5 cm H2O for starting compliance and 15 cm H2O for inflation and deflation compliances). No relationship was found between the compliances and the poorly aerated and nonaerated tissue. The specific compliance was in the normal range, whereas the amount of recruitment was related to the ratio of inflation compliance to starting compliance. Our data suggest that (1) the pressure-volume curve parameters in ARF investigate only the residual healthy zones of the lung and do not directly estimate the "amount" of disease (poorly or nonaerated tissue), (2) the pressure-volume curve may allow an estimate of the anatomic recruitment, and (3) the residual normally aerated zones of the ARF lung seem to maintain a normal intrinsic elasticity.