110 research outputs found

    Innovation intermediaries and performance-based incentives: a case study of regional innovation poles

    Get PDF
    A growing number of innovation policies rely on publicly funded innovation intermediaries to provide knowledge-intensive services to firms, particularly small and medium-sized ones. The performance of innovation intermediaries is often assessed using indicators that need to be closely aligned with policy objectives to be effective. However, this alignment is difficult to achieve and is often overlooked in practice. We analyse the relationship between performance indicators and the behaviour of intermediaries by examining a case study of innovation intermediaries funded with public resources in Tuscany (Italy). The intermediaries implemented actions that allowed them to achieve their performance targets rapidly. However, due to a misalignment between indicators and policy objectives, these actions were not entirely consistent with the latter. After reviewing the literature on this key issue, we build on our findings to suggest how to design performance indicators that can induce intermediaries to more effectively support the achievement of policy objectives

    Polynucleotide: Adenosine glycosidase is the sole activity of ribosome-inactivating proteins on DNA

    Get PDF
    Polynucleotide: adenosine glycosidases (PNAG) are a class of plant and bacterial enzymes commonly known as ribosome-inactivating proteins (RIP). They are presently classified as rRNA N-glycosidases in the enzyme nomenclature [EC 3.2.2.22]. Several activities on nucleic acids, other than depurination, have been attributed to PNAG: in particular modifications induced in circular plasmids, including linearisation and topological changes, and cleavage of guanidinic residues. Here we describe a chromatographic procedure to obtain nuclease-free PNAG by dye-chromatography onto Procion Red derivatized Sepharose®. Highly purified enzymes depurinate extensively pBR322 circular, supercoiled DNA at neutral pH and exhibit neither DNase nor DNA glycolyase activities, do not cause topological changes, and adenine is the only base released from DNA and rRNA, even at very high enzyme concentrations. A scanning force microscopy (SFM) study of pBR322 treated with saporin-S6 confirmed that (i) this PNAG binds extensively to the plasmid, (ii) the distribution of the bound saporin-S6 molecules along the DNA chain is markedly variable, (iii) plasmids already digested with saporin-S6 do not appear fragmented or topologically modified. The observations here described demonstrate that polynucleotide:adenosine glycosidase is the sole enzymatic activity of the four ribosome-inactivating proteins gelonin, momordin I, pokeweed antiviral protein from seeds and saporin-S6. These proteins belong to different families, suggesting that the findings here described may be generalized to all PNAG

    Innovation intermediaries as a response to system failures: creating the right incentives

    Get PDF
    Policymakers worldwide increasingly rely on the funding of innovation intermediaries in order to remedy failures in their innovation systems, including firms’ lack of information about sources of external knowledge and opportunities, lack of adequate competences and skills, lack of productive connections and the lack of formal and informal institutions in the system. To induce intermediaries to satisfactorily address the system failures they are called to confront, policymakers often make their funding conditional on their performance. Building on a case study of publicly funded innovation intermediaries in Tuscany (Italy), we identify several challenges in setting up appropriate performance-based incentives for intermediaries. These involve (i) failure to clearly articulate policy objectives in terms of system failures; (ii) failure to measure the achievement of all policy objectives; and (iii) failure to clearly link performance indicators with policy objectives. Based on the lessons learned from this case, we derive some implications for policy design

    Impact of continuing or quitting smoking on episodic cluster headache: a pilot survey

    Get PDF
    Abstract BACKGROUND: The majority of patients suffering from cluster headache (CH) are smokers and it has been suggested that smoking may trigger the development of CH. The aim of this pilot survey was to describe: 1. the differences between current, former, and never smokers CH patients; 2. if smoking changed during an active cluster period; 3. if CH changed after quitting. METHODS: All outpatients with episodic CH according to the criteria of ICHD-II who were consecutively seen for the first time from October 2010 to April 2012 at a headache centre were interviewed by phone using a specifically prepared questionnaire. Statistical differences between continuous variables were analysed by the Student's t-test or the one-way analysis of variance (ANOVA), followed by Newman-Keuls post-hoc testing. Comparisons between percentages were made using the Chi-square test or Fisher's exact test. All data were expressed as the mean ± standard deviation (SD). RESULTS: Among a total of 200 patients surveyed (172 males, 28 females; mean age ± SD: 48.41 ± 12 years) there were 60%, 21%, and 19% of current, former, and never smokers, respectively. Current smokers reported longer active periods (12.38 ± 10 weeks) and a higher maximum number of attacks per day (3.38 ± 1) compared to never smoker CH patients (5.68 ± 4 weeks, P <0.05 and 2.47 ± 1, P <0.05, respectively). During the active period most of the patients stated to decrease (45.7%) or not to change (45.7%) the number of cigarettes smoked. Among those who decreased smoking, most (83.8%) reported that they had less desire to smoke. After quitting, the majority of former smokers stated that their headache had not changed. CONCLUSIONS: Patients with episodic CH who are also smokers appear to have a more severe form of the disorder. However, it is unlikely that between CH and smoking there is a causal relationship, as CH patients rarely improve quitting smoking

    Solitary Fibrous Tumours of the Pleura

    Get PDF
    Solitary fibrous tumours of the pleura (SFTP) are rare neoplasms originating from one of the components of the sub-mesothelial connective layer underlying the pleura. They are the most common non-mesothelial primary pleural neoplasms but still remain relatively rare. Their behaviour is mostly indolent; however, some may de-differentiate into malignant and aggressive tumours. Surgical resection is the mainstay treatment for SFTP, even more so in case of voluminous masses, due to compression onto lung, mediastinum and great vessels. In this chapter, we discuss the disease characteristics reported in the literature with respect to clinical presentation, diagnosis and treatment; also, we will discuss the results of patients treated for SFTP who underwent a surgical treatment in our unit of thoracic surgery

    Epigenomic and somatic mutations of pituitary tumors with clinical and pathological correlations in 111 patients

    Get PDF
    Objective To profile clinically non-aggressive and aggressive pituitary adenomas (PAs)/pituitary neuroendocrine tumours (PitNETs) and pituitary carcinomas for somatic mutations and epigenetic alterations of genes involved in cell proliferation/differentiation, microRNAs (miRNA)/long noncoding RNA (LncRNA)-post-transcriptional regulators and therapy targets. Design Retrospective observational study. Patients and Measurements A total of 64 non-aggressive and 41 aggressive PAs/PitNETs and 6 pituitary carcinomas treated by endoscopic surgery with &gt;= 1-year follow-up were included. Somatic mutations of 17 genes and DNA methylation of 22 genes were assessed. Ten normal pituitaries were used as control. Results We found at least one mutation in 17 tumours, including 6/64 non-aggressive, 10/41 aggressive PAs/PitNETs, and 1/6 pituitary carcinoma. AIP (N = 6) was the most frequently mutated gene, followed by NOTCH (4), and TP53 (3). Hypermethylation of PARP15, LINC00599, ZAP70 was more common in aggressive than non-aggressive PAs/PITNETs (p &lt; .05). Lower levels of methylation of AIP, GNAS and PDCD1 were detected in aggressive PAs/PITNETs than non-aggressive ones (p &lt; .05). For X-linked genes, males presented higher level of methylation of FLNA, UXT and MAGE family (MAGEA11, MAGEA1, MAGEC2) genes in aggressive vs. non-aggressive PAs/PITNETs (p &lt; .05). In pituitary carcinomas, methylation of autosomal genes PARP15, LINC00599, MIR193 and ZAP70 was higher than in PAs/PITNETs, while X-linked genes methylation level was lower. Conclusions Somatic mutations and methylation levels of genes involved in cell proliferation/differentiation, miRNA/LncRNA-post-transcriptional regulators and targets of antineoplastic therapies are different in non-aggressive and in aggressive PAs/PitNETs. Methylation profile also varies according to gender. Combined genetic-epigenetic analysis, in association with clinico-radiological-pathological data, may be of help in predicting PA/PitNET behaviour

    Cheese as Functional Food: The Example of Parmigiano Reggiano and Grana Padano

    Get PDF
    Talijanski tvrdi kuhani sirevi, kao što su Parmigiano Reggiano i Grana Padano, imaju veliku nutritivnu vrijednost. Prema definiciji Europske Unije smatraju se funkcionalnom hranom, jer sadržavaju spojeve koji imaju specifična biološka svojstva. U ovom su preglednom radu ukratko opisani ti spojevi te njihov pozitivan učinak na zdravlje, i to u nekoliko poglavlja: proteini i peptidi, masti i lipidi, ugljikohidrati i prebiotici, probiotičke bakterije, vitamini, mineralne tvari, te sastojci mliječnih proizvoda s aktivnom ulogom u prevenciji bolesti. U uzorcima sira Parmigiano Reggiano pronađeno je nekoliko peptida s dokazanim biološkim svojstvima, npr. fosfopeptidi, koji imaju sposobnost vezivanja mineralnih tvari i funkciju prijenosnika funkcionalnih skupina, peptidi s imunomodulacijskim učinkom, te peptidi s antihipertenzijskim svojstvima i sposobnošću inibicije enzima koji konvertira angiotenzin. Među lipidima su opisane uloge konjugirane linolne kiseline i drugih masnih kiselina u siru. Također su opisani oligosaharidi s prebiotičkim svojstvima i probiotičke bakterije. Na kraju je posebno naglašena iskoristivost kalcija iz sireva, što je bitno za zdravlje kostiju.Italian hard cooked types of cheese, like Parmigiano Reggiano and Grana Padano, are characterised by positive nutritional qualities. In fact, they contain substances that have particular biological activities, and therefore they can be fully considered, according to the definition given by the European Unit, as ‘functional’ foods. This short review concisely describes these components and the beneficial effects related to their activities. The description of the biologically active components has been organised in the following paragraphs: protein and peptides, fat and lipids, carbohydrates and prebiotics, probiotic bacteria, vitamins, mineral salts, and components of dairy products active in disease prevention. In particular, several known bioactive peptides were found in Parmigiano Reggiano cheese samples: for example, phosphopeptides, which are known for their mineral-binding capacity and vehiculation activity, peptides with immunomodulatory activity, and angiotensin-converting enzyme-inhibitory peptides with anti-hypertensive effects. Among lipids, the role of conjugated linoleic acid and other fatty acids present in these cheese types was taken into consideration. The presence of oligosaccharides with prebiotic properties and probiotic bacteria was also described. Finally, particular emphasis was given to highly available calcium and its impact on bone health
    corecore