Synthesis of Bioactive Nickel Nanoparticles Using Bacterial Strains from an Antarctic Consortium.

Marine microorganisms have been demonstrated to be an important source for bioactive molecules. In this paper we report the synthesis of Ni nanoparticles (NiSNPs) used as reducing and capping agents for five bacterial strains isolated from an Antarctic marine consortium: Marinomonas sp. ef1, Rhodococcus sp. ef1, Pseudomonas sp. ef1, Brevundimonas sp. ef1, and Bacillus sp. ef1. The NiSNPs were characterized by Ultraviolet-visible (UV-vis) spectroscopy, Dynamic Light Scattering (DLS), Transmission Electron Microscopy (TEM), X-ray diffraction (XRD) and Fourier Transform Infrared (FTIR) spectroscopic analysis. The maximum absorbances in the UV-Vis spectra were in the range of 374 nm to 422 nm, corresponding to the Surface plasmon resonance (SPR) of Nickel. DLS revealed NiSNPs with sizes between 40 and 45 nm. All NiSNPs were polycrystalline with a face-centered cubic lattice, as revealed by XRD analyses. The NiSNPs zeta potential values were highly negative. TEM analysis showed that the NiSNPs were either spherical or rod shaped, well segregated, and with a size between 20 and 50 nm. The FTIR spectra revealed peaks of amino acid and protein binding to the NiSNPs. Finally, all the NiSNPs possess significant antimicrobial activity, which may play an important role in the management of infectious diseases affecting human health.

Preventive sparing of spinal cord and brain stem in the initial irradiation of locally advanced head and neck cancers.

Since reirradiation in recurrent head and neck patients is limited by previous treatment, a marked reduction of maximum doses to spinal cord and brain stem was investigated in the initial irradiation of stage III/IV head and neck cancers. Eighteen patients were planned by simultaneous integrated boost, prescribing 69.3 Gy to PTV1 and 56.1 Gy to PTV2. Nine 6 MV coplanar photon beams at equispaced gantry angles were chosen for each patient. Step-and-shoot IMRT was calculated by direct machine parameter optimization, with the maximum number of segments limited to 80. In the standard plan, optimization considered organs at risk (OAR), dose conformity, maximum dose < 45 Gy to spinal cord and < 50 Gy to brain stem. In the sparing plans, a marked reduction to spinal cord and brain stem were investigated, with/without changes in dose conformity. In the sparing plans, the maximum doses to spinal cord and brain stem were reduced from the initial values (43.5 ± 2.2 Gy and 36.7 ± 14.0 Gy), without significant changes on the other OARs. A marked difference (-15.9 ± 1.9 Gy and -10.1 ± 5.7 Gy) was obtained at the expense of a small difference (-1.3% ± 0.9%) from initial PTV195% coverage (96.6% ± 0.9%). Similar difference (-15.7 ± 2.2 Gy and -10.2 ± 6.1 Gy) was obtained compromising dose conformity, but unaffecting PTV195% and with negligible decrease in PTV295% (-0.3% ± 0.3% from the initial 98.3% ± 0.8%). A marked spinal cord and brain stem preventive sparing was feasible at the expense of a decrease in dose conformity or slightly compromising target coverage. A sparing should be recommended in highly recurrent tumors, to make potential reirradiation safer.

Silver nanoparticles from orange peel extract: Colorimetric detection of Pb2+ and Cd2+ ions with a chemometric approach.

Green silver nanoparticles (AgNPs@OPE) were obtained by using orange (citrus sinensis) peel water extract (OPE) that acts as a reducing and capping agent. This procedure permits the valorisation of waste as orange peel, and lowers the environmental impact of the process, with respect to the conventional synthetic procedure. The OPE extract reduced Ag(I) to Ag(0) in alkaline conditions, and stabilised the produced nanoparticles as a capping agent. The AgNPs@OPE were deeply characterized by UV-Vis spectroscopy, FT-IR, SEM analysis and DLS analysis and successively used as colorimetric sensors for different metals in aqueous solution. The colourimetric assay showed that AgNPs@OPE were able to detect Pb2+ and Cd2+, as demonstrated by the splits of surface plasmon resonance (SPR) band accompanied by the formation of a second new band; these spectral modification resulted in a colour change, from pristine nanoparticles' yellow to brown, due to the aggregation process. For the quantification of each of the two target cations, a calibration was performed by using the univariate linear regression, within the linearity ranges, exploiting the absorbance ratio between the main SPR band and the new band relative to the aggregate formation. Then a multivariate approach was followed to perform both Cd2+ and Pb2+ quantification by means of Partial Least Square regression (PLS) and target cations distinction by Linear Discriminant Analysis (LDA) applied on Principal Components Analysis (PCA) outputs, in both cases using the entire UV-Vis spectra (350-800 nm) as input data. Finally, the ability to quantify and distinguish between Cd2+ and Pb2+ was tested in tap water samples spiked with the two cations in order to confirm the application of the AgNPs@OPE as selective sensor in real samples.

Biomimetic Use of Food-Waste Sources of Calcium Carbonate and Phosphate for Sustainable Materials-A Review.

Natural and renewable sources of calcium carbonate (CaCO3), also referred to as "biogenic" sources, are being increasingly investigated, as they are generated from a number of waste sources, in particular those from the food industry. The first and obvious application of biogenic calcium carbonate is in the production of cement, where CaCO3 represents the raw material for clinker. Overtime, other more added-value applications have been developed in the filling and modification of the properties of polymer composites, or in the development of biomaterials, where it is possible to transform calcium carbonate into calcium phosphate for the substitution of natural hydroxyapatite. In the majority of cases, the biological structure that is used for obtaining calcium carbonate is reduced to a powder, in which instance the granulometry distribution and the shape of the fragments represent a factor capable of influencing the effect of addition. As a result of this consideration, a number of studies also reflect on the specific characteristics of the different sources of the calcium carbonate obtained, while also referring to the species-dependent biological self-assembly process, which can be defined as a more "biomimetic" approach. In particular, a number of case studies are investigated in more depth, more specifically those involving snail shells, clam shells, mussel shells, oyster shells, eggshells, and cuttlefish bones.

Free-breathing conformal irradiation of pancreatic cancer.

The purpose of this study was to assess treatment margins in free-breathing irradiation of pancreatic cancer after bone alignment, and evaluate their impact on conformal radiotherapy. Fifteen patients with adenocarcinoma of the head of the pancreas underwent implantation of single fiducial marker. Intrafraction uncertainties were assessed on simulation four-dimensional computed tomography (4D CT) by calculating maximal intrafraction fiducial excursion (MIFE). In the first ten patients, after bony alignment, the position of the fiducial was identified on weekly acquired megavolt cone-beam CT (MV-CBCT). The interfraction residual uncertainties were estimated by measuring the fiducial displacements with respect to the position in the first session. Patient mean (pM) and patient standard deviation (pSD) of fiducial displacement, mean (µM) and standard deviation (µSD) of pM, and root-mean-square of pSD (σ(res)) were calculated. In the other five patients, MIFE was added to the residual component to obtain personalized margin. In these patients, conformal kidney sparing (CONKISS) irradiation was planned prescribing 54/45 Gy to PTV1/PTV2. The organ-at-risk limits were set according to current NCCN recommendation. No morbidity related to the fiducial marker implantation was recorded. In the first ten patients, along right-left, anterior-posterior, and inferior-superior directions, MIFE was variable (mean ± std = 0.24 ± 0.13 cm, 0.31 ± 0.14 cm, 0.83 ± 0.35 cm, respectively) and was at most 0.51, 0.53, and 1.56 cm, respectively. Along the same directions, µM were 0.09, -0.05, -0.05 cm, µSD were 0.30, 0.17, 0.33 cm, and σ(res) were 0.35, 0.26, and 0.30 cm, respectively. MIFE was not correlated with pM and pSD. In the five additional patients, it was possible to satisfy recommended dose limits, with the exception of slightly higher doses to small bowel. After bony alignment, the margins for target expansion can be obtained by adding personalized MIFE to the residual interfraction term. Using these margins, conformal free-breathing irradiation is a reliable option for the treatment of pancreatic cancer.

Anterior segment mesenchymal dysgenesis in a large Australian family is associated with the recurrent 17 bp duplication in PITX3.

PURPOSE: A recurrent 17 bp duplication (c.657ins17bp) of a segment of the paired-like homeodomain transcription factor 3 (PITX3) gene on human chromosome 10 has been reported in seven families with autosomal dominant posterior polar cataracts with or without anterior segment mesenchymal dysgenesis (ASMD). ASMD can include Peters anomaly with corneal clouding, iridolenticular corneal adhesions, displaced Schwalbe's line, and cataract as described previously in a large Australian family. This study reports the examination of PITX3 in this Australian family. METHODS: Clinical examinations of the proband and her relatives were performed as part of routine follow up. A polymerase chain reaction (PCR) based test for the duplication in PITX3 was developed, and DNA from 21 members of the proband's family was tested. RESULTS: All clinically affected members of the family had the same 17 bp duplication of PITX3. There was no difference in the size of the duplication between the severely affected individuals and the more mildly affected individuals. Prenatal diagnosis was performed for two offspring of one affected person. In the first pregnancy, the fetus was shown to carry the duplication while in the second pregnancy, the fetus was shown to be homozygous for the normal allele. CONCLUSIONS: The results show that in some individuals within one family, duplication of this segment of PITX3 can result in severe symptoms leading to functional blindness while in other individuals in the same family or in other families, the same duplication leads to treatable cataract with minimal visual impairment.

Measurement of the clinical utility of a combined mutation detection protocol in carriers of Duchenne and Becker muscular dystrophy.

BACKGROUND: Recent methodological advances have improved the detection rate for dystrophin mutations, but there are no published studies that have measured the clinical utility of these protocols for carrier detection compared with conventional carrier testing protocols that use pedigree, serum creatine kinase levels and linkage analysis. METHODS AND SUBJECTS: The clinical utility of a combined mutation detection protocol was measured. It involved quantitative PCR procedures followed by DNA sequence analysis for the identification of dystrophin mutation carriers in 2101 women at risk of being carriers from 348 mutation-known Duchenne or Becker muscular dystrophy pedigrees. RESULTS: The combined mutation detection protocol identified a mutation in 96% and 82% of index cases of Duchenne muscular dystrophy and Becker muscular dystrophy, respectively. An additional 692 (33%) potential carriers were correctly classified by the combined mutation detection protocol compared with pedigree, serum creatine kinase levels and linkage analysis. Significantly lower mutation carrier rates were identified in the mothers of isolated cases with deletion mutations than predicted from theoretical considerations, but these findings were not confirmed for duplication and DNA sequence mutations. CONCLUSIONS: There are significant clinical benefits to be gained from a combined mutation detection protocol for carrier detection. It is recommended that mutation-specific carrier frequencies for the different classes of dystrophin mutations should be taken into account in genetic counselling practice.

On the use of the Positive and Negative Syndrome Scale in randomized clinical trials.

In the last 25 years, the Positive and Negative Syndrome Scale (PANSS) has been largely used to assess schizophrenia symptom intensity, but little information is available on how this scale was generally applied when evaluating the efficacy of schizophrenia therapies in randomized clinical trials. In the attempt to address this topic, a systematic PubMed Search was carried out using the keywords "PANSS" and "Randomized Clinical Trials". The analysis of retrieved articles highlighted that PANSS has constituted a suitable psychometric instrument to investigate the efficacy of pharmacological and non-pharmacological therapies. However, the information potentially provided by this scale was only partially reported in research articles, when characterizing the symptomatic features of patients at baseline. Furthermore, a consensus is needed to identify methodological strategies that may properly adapt PANSS-subscale structure with the symptomatic profiles of individuals enrolled in randomized controlled trials. The possibility that PANSS interview procedures and enrollment eligibility criteria may influence the symptomatic composition of patients involved in these studies is also discussed.

Role of (64)CuCl 2 PET/CT in staging of prostate cancer.

AIM: The presence of an elevated copper concentration in cancer cells may be potentially used to differentiate healthy from transformed cells. In this study, we aimed to look at the possible role of (64)CuCl2 PET/CT in staging of patients with prostate cancer (PC). METHODS: Seven patients affected by histologically confirmed PC have been prospectively enrolled. Three patients underwent adrenal deprivation therapy (ADT) at time of imaging. The remaining four patients had no ADT, surgery, or external beam radiation therapy (EBRT). In all patients, up to three (64)CuCl2 PET/CT scans 10 min, 1 h and 3 h (and an additional scan 24 h in 2 patients) after administration of mean 339 MBq (64)CuCl2 were performed and analyzed for presence of disease. Additionally, dosimetric calculations were performed. All patients underwent a multiparametric magnetic resonance imaging (mMRI) for confirmation of disease. RESULTS: Lesions specifically in the pelvic area could be easily delineated, which was due to the absence of urinary excretion of the tracer. (64)CuCl2 uptake was higher in primary tumors of patients without ADT than in patients under bicalutamide therapy. In two patients with suspected lymphadenopathy at MRI (>10 mm diameter), there was no enhanced (64)CuCl2 uptake. In other two patients, there was focal enhanced uptake in involved pelvic lymph nodes, one of which with a normal size of <10 mm. CONCLUSIONS: The preliminary results of this study show a high uptake of (64)CuCl2 in PC and involved regional lymph nodes indicating to a great potential of (64)CuCl2 PET/CT for primary staging of patients with prostate cancer.

[Can psychiatric trainees have a role in the improvement of training? The first 20 years of European Federation of Psychiatric Trainees]. / Gli specializzandi possono contribuire a migliorare la formazione in psichiatria? I primi 20 anni della European Federation of Psychiatric Trainees.

AIMS: The European Federation of Psychiatric Trainees (EFPT), founded in London in 1992, is an independent international federation of psychiatric trainees' national associations. The EFPT is engaged in several actions in order to pursue its general aims to promote high standards of quality of psychiatric training and promote the collaboration and networking between European psychiatric trainees. METHODS: Member associations constitute the general assembly that meets annually during the European Forum of Psychiatric Trainees. During the Forum, working groups are created and the activities for the next year are planned. RESULTS: Regular activities of the EFPT include the production of statements expressing the standpoint of trainees on educational issues, the conduction of research projects, the creation of new national trainees' associations, the facilitation of networking among European psychiatric trainees and the organization an annual meeting (EFPT Forum). The last EFPT Forum has been organized in Sorrento (Italy) on May 2012. Psychiatric trainees from 37 European countries have registered to this event. DISCUSSION: EFPT activities constitute a opportunity for psychiatric trainees to directly participate in the improvement of their psychiatric training and to establish a network with European colleagues that will contribute to their professonal development.

Prediction and prevention of the first psychotic episode: new directions and opportunities.

In the last few decades, substantial research has focused on the possibility of early detection and prevention of the first psychotic episode in young individuals at risk of developing this mental disturbance; however, unresolved clinical and ethical issues still call for further investigations. New perspectives and opportunities may come from the identification of selective psychopathological and instrumental markers linking the appearance of subtle psychotic symptoms with the clinical outcome of specific mental pathologies. Furthermore, empirically derived algorithms and risk staging models should facilitate the identification of targeted prevention therapies, possibly improving the efficacy of well-tolerated therapeutic approaches, such as psychological interventions and natural compound supplementations. To date, the collected evidence on the efficacy and tolerability of pharmacological prevention therapies raises more doubts than hopes. A very early detection of risk and appropriate symptomatic pattern classifications may provide a chance to better match prevention strategies with the development of psychosis.

Pathways to mental health care in Italy: results from a multicenter study.

BACKGROUND AND AIMS: In Italy, the reform of the mental health system in 1978 should have drastically changed the provision of care and pathways of patients seeking to obtain it. The aim of this article is to examine the current pathways to psychiatric care in Italy. METHODS: We used a method developed in the World Health Organization international collaborative studies to investigate pathways to care in 15 Italian mental health centers. We recruited 420 patients with a psychiatric illness and explored the care pathways they took to reach to psychiatric services and the delays from the onset of illness to reaching psychiatric care. RESULTS: The majority of patients (33.8%) had direct access to mental health care, whereas the others arrived to a specialist in psychiatry through general hospitals (20.3%), general practitioners (33.0%) or private practitioners (9.8%). The main diagnosis for referral was neurotic disorder (36.6%), followed by affective disorder (35.4%) and psychotic disorder (11.5%). The delay from onset of illness to psychiatric care was greater for patients with psychotic disorders than for those with affective and neurotic disorders. The most frequently prescribed treatments were pharmacotherapy (56%), psychological support (8%), and psychotherapy (7.0%); 15% of the patients received no treatment. CONCLUSIONS: Our multicenter study shows that although general practitioners and hospital doctors are still the main referral point for mental health care, a greater proportion of patients are first seen in private settings or directly reach mental health centers, compared to previous surveys conducted in Italy. However, a stronger collaboration of psychiatrists with general practitioners and psychologists is still needed.

[Urban insecurity and fear of crime in people suffering from mental disorders: a study in 24 Mental Health Centers in Italy]. / Insicurezza percepita e paura del crimine in persone affette da disturbi mentali: uno studio in 24 Centri di Salute Mentale.

AIMS: To assess in a sample of people with mental disorders: 1) fear of crime and perceived insecurity; 2) the association between fear of crime and insecurity; 3) the incidence of crimes. METHODS: Twenty-four Italian mental health centres have been invited to participate in the study from the network of the Early Career Psychiatrists' Committee of the Italian Psychiatric Association. In each participating centre, the first 20 patients consecutively accessing the mental health centre between February and April 2011 have been recruited. All patients have been assessed using validated assessment tools. RESULTS: The final sample consists of 426 patients. They are mostly female (70.1%), with a mean age of 45 years (± 13.5), and with a good level of education. Fifty-two percent of patients have a diagnosis of mood disorders, and 37.8% on anxiety spectrum disorders. About half of the sample declares that the most prominent feeling toward life is uncertainty. Almost all patients report to have at least one big fear, with the most frequently report being: 1) loss or death of a loved one (41.2%); 2) financial constraint (28.4%); 3) physical or mental health problems (26.5%). DISCUSSION AND CONCLUSIONS: Our results show the presence of a common sense of uncertainty among patients, probably as a result of the historical moment we are facing. It is reasonable that this attitude toward life can have a detrimental impact on patients' psychological and physical wellbeing, contributing to high levels of distress. Further studies are needed in order to clarify the possible relationship between fears, uncertainty and mental disorders.

Effects of controlled-release formulations of atypical antipsychotics on functioning and quality of life of schizophrenic individuals.

INTRODUCTION: Controlled-release formulations of atypical antipsychotics have recently been introduced into clinical practice. Clinical studies have indicated that these new therapies induce meaningful improvements in the functioning and quality of life of schizophrenic individuals. AREAS COVERED: The present analysis makes an attempt to address the clinical relevance of these studies and their contribution to the understanding of the mechanisms of action of these new drugs. A Medline search was done using the keywords 'antipsychotic', 'plasma level', 'quality of life' and 'functioning'. EXPERT OPINION: After reviewing the literature, it seems that symptom control and side effects may play a role in modulating the functioning and quality of life of schizophrenic individuals treated with controlled-release formulations of atypical antipsychotics. The analysis also highlights that these new drugs may possess peculiarities and similarities in regulating patient functioning. However, the low number of clinical analyses that have focused on these aspects of antipsychotic therapy limits the interpretation of the results. Additional comparative clinical trials are needed to evaluate how the pharmacokinetic/pharmacodynamic properties of antipsychotic drugs may modulate the functioning and quality of life of schizophrenic individuals, as well as to establish whether new clinical benefits may come from the use of these drugs in schizophrenia therapy.