Third whole-brain radiation therapy for multiple brain metastases. Should it be considered in selected patients?

Whole brain reirradiation for the treatment of multiple brain metastases has shown promising results. However, concerns remain over the possible neurotoxic effects of the cumulative dose as well as the questionable radiosensitivity of recurrent metastases. A second reirradiation of the whole brain is ordinarily performed in our department for palliative purposes in patients presenting with multiple metastatic brain progression. For this study, an investigational third whole brain reirradiation has been administered to highly selected patients to obtain disease control and delay progression. Clinical outcomes and neurological toxicity were also evaluated.

Can we rely on histopathological results for the diagnostic of prosthetic joint infection?

BACKGROUND

Histopathology is one of the diagnostic criteria for prosthetic joint infection (PJI) proposed by all academic societies. The aim of this study was to compare histopathological and microbiological results from samples taken intraoperatively at the same site in patients with suspected or proven PJI.

PATIENTS AND METHODS

We conducted a monocenter retrospective study including all patients having undergone surgery from 2007 to 2015 with suspected or proven PJI. During surgery, both histopathological and microbiological samples were taken. Patients with a history of antimicrobial treatment 2 weeks prior to surgery were excluded. We considered as major criteria and gold standard for PJI diagnosis the presence of a sinus tract communication and/or the same microorganism in at least two cultures.

RESULTS

Finally, 181 patients who underwent 309 surgeries were included. The median number of samples per surgery was 4 (interquartile range (IQR) = 3-5) for histopathology and 5 (IQR=4-6) for microbiology. Major criteria were observed in 177 patients (57.3%), while positive histology in at least one intraoperative sample was present in 119 (38.5%). The concordance was 74%. The sensitivity and specificity of histopathology were 61% and 92% respectively. Available "histopathology-culture" sample pairs numbered 1247. Among them, positive histopathology was found in 292 samples (23%) and culture in 563 (45%). Concordance was 64%. The highest correlation was observed for very early infection (< 1 month) (OR: 9.1, 95% CI: 3.6-23) and for virulent microorganisms, such as Staphylococcus aureus (OR: 7.8, 95% CI: 5.2-11.8), Streptococci (OR:7.8; 95% CI: 4-15.2) or Enterobacterales (OR: 7.4; 95% CI: 4.2-13.1).

CONCLUSION

Histopathologic examination is a valuable criterion for PJI diagnosis, but it may lack sensitivity for chronic infections or due to low-virulence pathogens.

Chemotherapy toxicity and activity in patients with pancreatic ductal adenocarcinoma and germline BRCA1-2 pathogenic variants (gBRCA1-2pv): a multicenter survey

BACKGROUND

Germline BRCA1-2 pathogenic variants (gBRCA1-2pv)-related pancreatic ductal adenocarcinoma (PDAC) showed increased sensitivity to DNA cross-linking agents. This study aimed at exploring safety profile, dose intensity, and activity of different chemotherapy regimens in this setting.

PATIENTS AND METHODS

gBRCA1-2pv PDAC patients of any age and clinical tumor stage who completed a first course of chemotherapy were eligible. A descriptive analysis of chemotherapy toxicity, dose intensity, response, and survival outcomes was performed.

RESULTS

A total of 85 gBRCA1-2pv PDAC patients treated in 21 Italian centers between December 2008 and March 2021were enrolled. Seventy-four patients were assessable for toxicity and dose intensity, 83 for outcome. Dose intensity was as follows: nab-paclitaxel 72%, gemcitabine 76% (AG); cisplatin 75%, nab-paclitaxel 73%, capecitabine 73%, and gemcitabine 65% (PAXG); fluorouracil 35%, irinotecan 58%, and oxaliplatin 64% (FOLFIRINOX). When compared with the literature, grade 3-4 neutropenia, thrombocytopenia, and diarrhea were increased with PAXG, and unmodified with AG and FOLFIRINOX. RECIST responses were numerically higher with the three- (81%) or four-drug (73%) platinum-containing regimens that outperformed AG (41%) and oxaliplatin-based doublets (56%). Carbohydrate antigen 19.9 (CA19.9) reduction >89% at nadir was reported in two-third of metastatic patients treated with triplets and quadruplets, as opposed to 33% and 45% of patients receiving oxaliplatin-based doublets or AG, respectively. All patients receiving AG experienced disease progression, with a median progression-free survival (mPFS) of 6.4 months, while patients treated with platinum-containing triplets or quadruplets had an mPFS >10.8 months. Albeit still immature, data on overall survival seemed to parallel those on PFS.

CONCLUSIONS

Our data, as opposed to figures expected from the literature, highlighted that platinum-based regimens provoked an increased toxicity on proliferating cells, when dose intensity was maintained, or an as-expected toxicity, when dose intensity was reduced, while no change in toxicity and dose intensity was evident with AG. Furthermore, an apparently improved outcome of platinum-based triplets or quadruplets over other regimens was observed.

The influence of a 16-week exercise program, APOE status, and age on executive function task performance: A randomized trial

Previous research has shown beneficial cognitive changes following exercise training in older adults. However, the work on the potential moderating effects of Apoliprotein E (APOE) ε4 carrier status has been mixed, and the role of exercise intensity remains largely unexplored. The present study sought to examine the influence of APOE ε4 status and exercise intensity on measures of cognitive performance in a group of older adults. Cross-sectional comparisons between a group of younger inactive adults (n = 44, age = 28.86 ± 0.473 SD, 60.5% female) and a group of older inactive adults (n = 142, age = 67.8 ± 5.4, 62.7% female) were made on baseline measurements of APOE ε4 status, VO₂peak, and cognitive performance in the domain of executive functioning. The older adults also participated in a randomized controlled exercise trial, exercising three times per week for 16-weeks in either a low-intensity continuous training (LICT) group or a moderate-intensity continuous training plus interval training (MICT+IT) group at the Center for Health and Neuroscience, Genes, and Environment (CUChange) Exercise Laboratory. Follow-up measurements of VO₂peak and cognitive performance were collected on the older adults after the exercise intervention. Cross-sectional comparisons between the older and younger adults demonstrated significant impairments among older adults in Stroop effect on error and time, Category Switch mixing effects, and Keep Track task. This impairment was not moderated by APOE ε4 carrier status. Improvements from pre- to post-exercise intervention were observed in both exercise groups in Stroop effect on error ([F (1, 256) = 9.381, p < 0.01, η² = 0.031]) and Category Switch switching effect reaction time ([F(1, 274) = 4.442, p < 0.05, η² = 0.020]), with no difference between exercise groups. The moderating effects of APOE ε4 carrier status were mixed. Exercise did not improve the Stroop effect on error among ε4 carriers assigned to MICT+IT when improvements were seen in all other groups. Further research is needed to examine the mechanisms of action by which exercise impacts cognitive task performance, and possible moderators such as genetic variability and exercise intensity.

Wnt (canonical and non canonical) pathways in breast carcinoma with extensive vascular invasion and inflammatory breast carcinoma

BACKGROUND

Breast carcinoma with extensive peritumoral vascular invasion (ePVI-BC) is a cancer with massive vascular invasion (>10) detected in more than one slide. This neoplasm shows clinic-pathological affinity with inflammatory breast carcinoma (IBC). In this paper we evaluate their biological relationship through the study of surrogate markers (β-catenin and NFAT5) of Canonical (cWnt) and non-canonical (nWnt) Wnt pathways activation.

METHODS

By immunoistochemistry, we investigate β-catenin and NFAT5 in 39 IBC, 74 ePVI-BC and 84 control cases (CG-BC).

RESULTS

cWnt was activated in 100 % of ePVI-BC, in 64 % of IBC and 10 % of CG-BC. nWnt was activated in 20 % of ePVI-BC, 50 % of IBC and 1% of CG-BC. The prognosis of carcinomas with nWnt activated was poor similar to IBC. The statistical analysis evidences as both the pathways are synergistic in malignant progression and survival time. β-catenin show an important association with prognostic factors and NFAT5 shows a relevant prognostic role on OS (p = 1.5*10^-6) and DFS (P = 1,2*10^-4). nWnt is associated with a worse prognosis independently of cWnt. cWnt is associated with adverse prognosis (DFS p = 0.0469; OS p = 0.004891) but its prognostic role is indifferent in carcinoma with nWnt activated.

CONCLUSIONS

Canonical Wnt pathway is involved in malignant progression with dominant role for vascular invasion whereas non canonical Wnt pathway plays an important role on survival time including the capacity to identify carcinomas with IBC-like prognosis. Furthermore ePVI may represent a "prodromal form of IBC" as demonstrated by its clinicopathological and biological similarity with IBC.

Germinal BRCA1-2 pathogenic variants (gBRCA1-2pv) and pancreatic cancer: epidemiology of an Italian patient cohort

OBJECTIVE

Germline BRCA1-2 pathogenic variants (gBRCApv) increase the risk of pancreatic cancer and predict for response to platinating agents and poly(ADP-ribose) polymerase inhibitors. Data on worldwide gBRCApv incidence among pancreatic ductal adenocarcinoma (PDAC) patients are sparse and describe a remarkable geographic heterogeneity. The aim of this study is to analyze the epidemiology of gBRCApv in Italian patients.

MATERIALS AND METHODS

Patients of any age with pancreatic adenocarcinoma, screened within 3 months from diagnosis for gBRCApv in Italian oncologic centers systematically performing tests without any selection. For the purposes of our analysis, breast, ovarian, pancreas, and prostate cancer in a patient's family history was considered as potentially BRCA-associated. Patients or disease characteristics were examined using the χ2 test or Fisher's exact test for qualitative variables and the Student's t-test or Mann-Whitney test for continuous variables, as appropriate.

RESULTS

Between June 2015 and May 2020, 939 patients were tested by 14 Italian centers; 492 (52%) males, median age 62 years (range 28-87), 569 (61%) metastatic, 273 (29%) with a family history of potentially BRCA-associated cancers. gBRCA1-2pv were found in 76 patients (8.1%; 9.1% in metastatic; 6.4% in non-metastatic). The gBRCA2/gBRCA1 ratio was 5.4 : 1. Patients with gBRCApv were younger compared with wild-type (59 versus 62 years, P = 0.01). The gBRCApv rate was 17.1% among patients <40 years old, 10.4% among patients 41-50 years old, 9.2% among patients 51-60 years old, 6.7% among patients aged 61-70 years, and 6.2% among patients >70 years old (none out of 94 patients >73 years old). gBRCApv frequency in 845 patients <74 years old was 9%. Patients with/without a family history of potentially BRCA-associated tumors had 14%/6% mutations.

CONCLUSION

Based on our findings of a gBRCApv incidence higher than expected in a real-life series of Italian patients with incident PDAC, we recommend screening all PDAC patients <74 years old, regardless of family history and stage, due to the therapeutic implications and cancer risk prevention in patients' relatives.

Correction: Stabilization of negative capacitance in ferroelectric capacitors with and without a metal interlayer

Correction for 'Stabilization of negative capacitance in ferroelectric capacitors with and without a metal interlayer' by T. Rollo, et al., Nanoscale, 2020, 12, 6121-6129, DOI: 10.1039/C9NR09470A.

Stabilization of negative capacitance in ferroelectric capacitors with and without a metal interlayer

The negative capacitance operation of a ferroelectric material is not only an intriguing materials science topic, but also a property with important technological applications in nanoscale electronic devices. Despite growing interest for possible applications, the very existence of negative capacitance is still actively debated, even because experimental results for ferroelectric capacitors with or without a metal interlayer led to quite contradicting indications. Here we present a comprehensive analysis of NC operation in ferroelectric capacitors and provide new insights into the discrepancies observed in experiments. Our models duly account for the three-dimensional nature of the problem and show a good agreement with several aspects of recent experiments. Our results also demonstrate that traps at the ferroelectric-dielectric interface play an important role in the feasibility of stable negative capacitance operation in ferroelectric capacitors.

Prospects for observing and localizing gravitational-wave transients with Advanced LIGO, Advanced Virgo and KAGRA

We present our current best estimate of the plausible observing scenarios for the Advanced LIGO, Advanced Virgo and KAGRA gravitational-wave detectors over the next several years, with the intention of providing information to facilitate planning for multi-messenger astronomy with gravitational waves. We estimate the sensitivity of the network to transient gravitational-wave signals for the third (O3), fourth (O4) and fifth observing (O5) runs, including the planned upgrades of the Advanced LIGO and Advanced Virgo detectors. We study the capability of the network to determine the sky location of the source for gravitational-wave signals from the inspiral of binary systems of compact objects, that is binary neutron star, neutron star-black hole, and binary black hole systems. The ability to localize the sources is given as a sky-area probability, luminosity distance, and comoving volume. The median sky localization area (90% credible region) is expected to be a few hundreds of square degrees for all types of binary systems during O3 with the Advanced LIGO and Virgo (HLV) network. The median sky localization area will improve to a few tens of square degrees during O4 with the Advanced LIGO, Virgo, and KAGRA (HLVK) network. During O3, the median localization volume (90% credible region) is expected to be on the order of 10 5 , 10 6 , 10 7 Mpc 3 for binary neutron star, neutron star-black hole, and binary black hole systems, respectively. The localization volume in O4 is expected to be about a factor two smaller than in O3. We predict a detection count of 1 - 1 + 12 ( 10 - 10 + 52 ) for binary neutron star mergers, of 0 - 0 + 19 ( 1 - 1 + 91 ) for neutron star-black hole mergers, and 17 - 11 + 22 ( 79 - 44 + 89 ) for binary black hole mergers in a one-calendar-year observing run of the HLV network during O3 (HLVK network during O4). We evaluate sensitivity and localization expectations for unmodeled signal searches, including the search for intermediate mass black hole binary mergers.

CROCC-mutated rhabdoid colorectal carcinoma showing in intercellular spaces lamellipodia and cellular projections revealed by electron microscopy

BACKGROUND

Rhabdoid colorectal carcinoma (RC) is a rare lesion localized to the proximal colon of patients with a mean age at diagnosis of around 70 years. This tumor shows an aggressive behavior with an overall survival period shorter than 12 months. The diagnostic hallmark is the presence of rhabdoid cells. Alterations in chromatin remodeling (SMARCB1) and in the centrosome structure (CROCC) are reported in RC usually BRAF^mut and MSI-H. RKO intestinal neoplastic cells culture (BRAF^mut, SMARCB1^wt, MSI-H) with CROCC knockdown exhibit rhabdoid features and develop prominent projections from the edge of the cell.

METHODS

Here, we investigated two cases of CROCC^mutSMARCB1^wt RC by scanning and transmission electron microscopy (SEM, TEM).

RESULTS

TEM confirmed the diagnostic presence of intermediate cytoplasmic filaments and nucleolar margination. SEM showed cellular protrusions (lamellipodia) in the intercellular spaces not evident at light microscopy.

CONCLUSIONS

These protrusions CROCC-related might represent the pathogenetic mechanism underlying the rhabdoid aggressive behavior, independently of tumor staging. To our knowledge, the SEM technique was applied in the study of this neoplasm for the first time.

Tests of General Relativity with GW170817

The recent discovery by Advanced LIGO and Advanced Virgo of a gravitational wave signal from a binary neutron star inspiral has enabled tests of general relativity (GR) with this new type of source. This source, for the first time, permits tests of strong-field dynamics of compact binaries in the presence of matter. In this Letter, we place constraints on the dipole radiation and possible deviations from GR in the post-Newtonian coefficients that govern the inspiral regime. Bounds on modified dispersion of gravitational waves are obtained; in combination with information from the observed electromagnetic counterpart we can also constrain effects due to large extra dimensions. Finally, the polarization content of the gravitational wave signal is studied. The results of all tests performed here show good agreement with GR.

Ash clouds temperature estimation. Implication on dilute and concentrated PDCs coupling and topography confinement

Pyroclastic density currents (PDCs) are among the most hazardous of all volcanic processes in terms of high speeds and unpredictable extent. While concentrated PDCs are usually topographically confined, the dilute counterpart (ash cloud) is able to overrun topographic barriers, with unexpected trajectories posing a high risk for human settlements around the volcano. Here, for the first time, the temperature of an ash could, for a PDC originated during the 11 July, 2015 Volcán de Colima eruption, is determined, without pre-installed instruments, based on the degree of charcoaling of trees affected by the ash cloud. Temperature estimations were performed using Reflectance analysis and microtomography images processing of pine wood charred fragments. The combination of these two independent and well-established methods to organic matter charred in a volcanic environment constitutes a pioneering attempt for the indirect temperature estimation of dilute pyroclastic density currents (PDCs). Charcoal fragments were sampled at different heights along tree trunks outstanding from the PDC deposit. Both the temperatures obtained from charcoal analyses (reflectance and microtomography) and observation of damages to the tree trunks allowed to distinguish: (i) a lower Zone A, which extends 150–180 cm above the top of the PDC deposit, where trunks show peeled bark and multiple lithic impacts; temperature values are equal or slightly higher than the underlying deposit for the entire length of the valley; (ii) an upper Zone B, developed above 150–180 cm from the top of the PDC deposit, where trees are only burned without any block impact marks; temperature estimations for Zone B are comparable with the PDC deposit temperature range from proximal to distal areas. The temperature data indicate that the 11 July, 2015 Colima PDC event, the ash cloud was always thermally coupled with the under-running concentrated flow for the entire length of the ravine, explaining the observed strong vertical uplift of the ash cloud and the substantial absence of ash cloud detachments along flow. A corollary of our study is that, should a detachment have occurred, the ash cloud surge would have had initial temperatures as high as the one carried by the high concentration part of the PDC. A major outcome of our study is that the temperature estimation of ash clouds bears important implication in terms of hazard assessment for pyroclastic density currents along narrow valleys that usually cut the steep slopes of stratovolcanoes.

Constraining the p-Mode-g-Mode Tidal Instability with GW170817

We analyze the impact of a proposed tidal instability coupling p modes and g modes within neutron stars on GW170817. This nonresonant instability transfers energy from the orbit of the binary to internal modes of the stars, accelerating the gravitational-wave driven inspiral. We model the impact of this instability on the phasing of the gravitational wave signal using three parameters per star: an overall amplitude, a saturation frequency, and a spectral index. Incorporating these additional parameters, we compute the Bayes factor (lnB_{!pg}^{pg}) comparing our p-g model to a standard one. We find that the observed signal is consistent with waveform models that neglect p-g effects, with lnB_{!pg}^{pg}=0.03_{-0.58}^{+0.70} (maximum a posteriori and 90% credible region). By injecting simulated signals that do not include p-g effects and recovering them with the p-g model, we show that there is a ≃50% probability of obtaining similar lnB_{!pg}^{pg} even when p-g effects are absent. We find that the p-g amplitude for 1.4  M_{⊙} neutron stars is constrained to less than a few tenths of the theoretical maximum, with maxima a posteriori near one-tenth this maximum and p-g saturation frequency ∼70  Hz. This suggests that there are less than a few hundred excited modes, assuming they all saturate by wave breaking. For comparison, theoretical upper bounds suggest ≲10^{3} modes saturate by wave breaking. Thus, the measured constraints only rule out extreme values of the p-g parameters. They also imply that the instability dissipates ≲10^{51}  erg over the entire inspiral, i.e., less than a few percent of the energy radiated as gravitational waves.

Characteristics of Enterobacter cloacae prosthetic joint infections

OBJECTIVES

Enterobacter cloacae prosthetic joint infections (PJI) are rare and poorly documented.

PATIENTS AND METHODS

We conducted a retrospective and monocentric study in an orthopedic unit supporting complex bone and joint infections. Between 2012 and 2016 we collected background, clinical, biological, and microbiological data from 20 patients presenting with prosthetic joint infection and positive for E. cloacae, as well as data on their surgical and medical treatment and outcome.

RESULTS

Infections were localized in the hip (n=14), knee (n=5), or ankle (n=1). The median time between arthroplasty and septic revision was three years. Fourteen patients (70%) had undergone at least two surgeries due to previous prosthetic joint infections. The median time between the last surgery and the revision for E. cloacae infection was 31 days. Eleven patients (55%) were infected with ESBL-producing strains. The most frequently used antibiotics were carbapenems (n=9), cefepime (n=7), quinolones (n=7), and fosfomycin (n=4). The infection was cured in 15 patients (78.9%) after a 24-month follow-up. Five patients had a recurrent infection with another microorganism and four patients had a relapse of E. cloacae infection. The global success rate was 52.7% (58.3% for DAIR and 75% for DAIR+ciprofloxacin).

CONCLUSION

Prosthetic joint infections due to E. cloacae usually occur early after the last prosthetic surgery, typically in patients with complex surgical and medical histories. The success rate seems to be increased when DAIR is associated with ciprofloxacin.

Search for Subsolar-Mass Ultracompact Binaries in Advanced LIGO's First Observing Run

We present the first Advanced LIGO and Advanced Virgo search for ultracompact binary systems with component masses between 0.2  M_{⊙}-1.0  M_{⊙} using data taken between September 12, 2015 and January 19, 2016. We find no viable gravitational wave candidates. Our null result constrains the coalescence rate of monochromatic (delta function) distributions of nonspinning (0.2  M_{⊙}, 0.2  M_{⊙}) ultracompact binaries to be less than 1.0×10^{6}  Gpc^{-3}  yr^{-1} and the coalescence rate of a similar distribution of (1.0  M_{⊙}, 1.0  M_{⊙}) ultracompact binaries to be less than 1.9×10^{4}  Gpc^{-3}  yr^{-1} (at 90% confidence). Neither black holes nor neutron stars are expected to form below ∼1  M_{⊙} through conventional stellar evolution, though it has been proposed that similarly low mass black holes could be formed primordially through density fluctuations in the early Universe and contribute to the dark matter density. The interpretation of our constraints in the primordial black hole dark matter paradigm is highly model dependent; however, under a particular primordial black hole binary formation scenario we constrain monochromatic primordial black hole populations of 0.2  M_{⊙} to be less than 33% of the total dark matter density and monochromatic populations of 1.0  M_{⊙} to be less than 5% of the dark matter density. The latter strengthens the presently placed bounds from microlensing surveys of massive compact halo objects (MACHOs) provided by the MACHO and EROS Collaborations.

GW170817: Measurements of Neutron Star Radii and Equation of State

On 17 August 2017, the LIGO and Virgo observatories made the first direct detection of gravitational waves from the coalescence of a neutron star binary system. The detection of this gravitational-wave signal, GW170817, offers a novel opportunity to directly probe the properties of matter at the extreme conditions found in the interior of these stars. The initial, minimal-assumption analysis of the LIGO and Virgo data placed constraints on the tidal effects of the coalescing bodies, which were then translated to constraints on neutron star radii. Here, we expand upon previous analyses by working under the hypothesis that both bodies were neutron stars that are described by the same equation of state and have spins within the range observed in Galactic binary neutron stars. Our analysis employs two methods: the use of equation-of-state-insensitive relations between various macroscopic properties of the neutron stars and the use of an efficient parametrization of the defining function p(ρ) of the equation of state itself. From the LIGO and Virgo data alone and the first method, we measure the two neutron star radii as R_{1}=10.8_{-1.7}^{+2.0}  km for the heavier star and R_{2}=10.7_{-1.5}^{+2.1}  km for the lighter star at the 90% credible level. If we additionally require that the equation of state supports neutron stars with masses larger than 1.97  M_{⊙} as required from electromagnetic observations and employ the equation-of-state parametrization, we further constrain R_{1}=11.9_{-1.4}^{+1.4}  km and R_{2}=11.9_{-1.4}^{+1.4}  km at the 90% credible level. Finally, we obtain constraints on p(ρ) at supranuclear densities, with pressure at twice nuclear saturation density measured at 3.5_{-1.7}^{+2.7}×10^{34}  dyn cm^{-2} at the 90% level.

Intracystic Papillary Carcinoma of the Male Breast. A Case Report: (Histochemical, immunohistochemical and ultrastructural study)

We report a case of intracystic papillary carcinoma of the male breast in a 70-year-old male Caucasian. Grossly, the tumor was a cystic lesion measuring 6 cm in diameter. It contained hemorrhagic fluid and a mural nodule with filiform projections. PAS stain with and without digestion revealed small clumps of diastase-resistent material in the cytoplasm of the neoplastic cells. Grimelius stain was positive. Immunoperoxidase stains were negative for neuron-specific enolase, S100 protein, cromogranin and synaptophysin and were positive for carcinoembryonic antigen and epithelial membrane antigen. On ultrastructural examination the neoplastic cells showed membrane-bound, dense-core secretory granules. We believe that this neoplasm, despite negative neuroendocrine markers, is a variant of mammary adenocarcinoma with endocrine differentiation, partly because of the positive Grimelius stain and partly because of the presence of electron-dense granules, which according to some authors represent lactational differentiation.

Direct versus acetalization routes in the reaction network of catalytic HMF etherification

The etherification of HMF (5-hydroxymethylfurfural) to EMF (5-(ethoxymethyl)furan-2-carbaldehyde) is studied over a series of MFI-type zeolite catalysts containing different heteroatoms (B, Fe, Al), aiming to understand the effect of different isomorph substitutions in the MFI framework on the reaction pathways of HMF conversion.

Suicide and drug and alcohol addiction: Self-destructive behaviours. An observational study on clinic hospital population

Introduction

Suicidal behaviour and drug and alcohol dependence represent two different aspects of self-destructive behavior.

Objectives

We evaluated the relationship between suicidal behavior and substance and alcohol addiction. It was investigated the role of childhood trauma in these self-destructive behaviors and in the development of the two mental constructions of hopelessness and mentalization.

Aims

We also assessed how a high level of hopelessness could affect suicidal ideation and how low or absent capacity of mentalization could influence the development of substance and/or alcohol addiction.

Methods

This naturalistic, observational study included 50 patients (mean age = 46.54; S.D = 14.57) recruited from the department of psychiatry (n = 18) and the centre for suicide prevention (n = 32) of Sant’Andrea Hospital (Rome). Different questionnaires were administered to each patient from February to May 2016.

Results

There was not a statistically significant relationship between suicidal behavior and addict behavior. Childhood trauma resulted a risk factor for alcohol abuse with a relationship that tended to significance (P = 0.07). Physical and sexual abuses were significantly associated with addiction (respectively P = 0.014; P = 0.033). It was showed a statistically significant interaction between high level of hopelessness and suicidal ideation (P = 0.037). The absence of mentalization was related to the absence of alcohol abuse (P = 0.061). Finally, trauma experienced during childhood was associated with high level of hopelessness (P = 0.005).

Conclusions

Suicidal behavior is influenced indirectly by a childhood traumatic experience that conditioning the level of hopelessness. Childhood trauma affected directly the development of drug abuse and alcoholism. The capacity of mentalization was not related with childhood trauma.

Disclosure of interest

The authors have not supplied their declaration of competing interest.

Effects of chronic antipsychotic treatment on neurophysiological correlates of the auditory oddball task in schizophrenia: A preliminary report from a multicentre study

Introduction

The effects of chronic antipsychotic administration on the human brain are debated. In particular, first-generation (FGAs) and second-generation antipsychotics (SGAs) seem to have different impacts on brain function and structure in subjects with schizophrenia. Few studies have investigated the effect of chronic administration of FGAs and SGAs on indices of brain function, such as event-related potentials (ERP) or neuropsychological performance.

Objectives

Within the Italian Network for Research on Psychoses study, subjects stabilized on FGAs or SGAs were compared on P300, an ERP component, thought to reflect attention, working memory and context integration and on neurocognitive indices.

Methods

ERPs were recorded in 110 chronic, stabilized patients with Schizophrenia (28 used FGAs) during a standard auditory oddball task. P300 latency and amplitude were assessed at Pz channel. MATRICS Consensus Cognitive Battery (MCCB) was used for cognitive assessment.

Results

Compared with the SGAs group, patients on FGAs showed significant increased P300 latency (P = 0.003; Cohen's d = 0.67) and significant decreased P300 amplitudes (P = 0.023; Cohen's d = 0.38). The two groups did not differ on psychopathology and MCCB scores. Multiple linear regressions revealed that “FGAs vs. SGAs” (β = 0.298, P = 0.002) and MCCB neurocognitive composite T-score (β = –0.273, P = 0.004) were independent predictors of P300 latency, whereas only age (β = –0.220, P = 0.027) was an independent predictor of P300 amplitude.

Conclusions

FGAs seem to affect the functional brain activity more than SGAs, particularly slowing cortical processing. Our results suggest that discrepant findings concerning P300 latency in schizophrenia might be related to the type of antipsychotic treatment used. Longitudinal studies are needed to further address this issue.

Disclosure of interest

The authors have not supplied their declaration of competing interest.

Joint infection due to Raoultella planticola: first report

The genus Raoultella has been separated from the genus Klebsiella in 2001. Two main species are responsible for human infections: R. ornithinolytica and R. planticola. The most frequent infections due to R. planticola include cystitis, pneumonia and bacteremia (mostly in immunocompromised hosts). To date, no joint or bone infection has been reported. We describe the first case of septic arthritis due to R. planticola following an arthroscopy with intra-articular injection of corticosteroids. Evolution was favorable after arthroscopic lavage and antibiotic therapy with quinolones. Raoultella planticola has been described rarely in human infection. It is mainly deemed responsible for cystitis, pneumonia and bacteremia (mostly in immunocompromised hosts) [1-3]. To our knowledge no case of bone or joint infection has been reported. We described here the first case of infective arthritis due to R. planticola involving a native knee joint following synovectomy and intra-articular injection of corticosteroids during arthroscopy.

Exhaled nitric oxide dynamics in asthmatic reactions induced by diisocyanates

BACKGROUND

Isocyanate-induced asthmatic reactions are associated with delayed increase in fractional exhaled nitric oxide measured at expiratory flow of 50 mL/s (FeNO50), a biomarker of airway inflammation. The time course of FeNO increase is compatible with the activation of NO synthase, but the origin of NO production in the lung is undetermined.

OBJECTIVE

The aim of this study was to define the dynamics of airway and alveolar NO during specific inhalation challenge (SIC) with isocyanates and the role of asymmetric dimethylarginine (ADMA), an endogenous inhibitor of NO synthase.

METHODS

Spirometry, exhaled NO parameters (FeNO50, bronchial wall NO concentration, NO airway diffusing capacity, NO flux to luminal space, alveolar NO) and ADMA levels in exhaled breath condensate were measured before and at intervals up to 24 h after exposure to isocyanates. The results were compared between 17 SIC-positive and eight SIC-negative subjects.

RESULTS

A significant FeNO50 increase in SIC-positive subjects was detected 24 h after exposure and was associated with the augmented NO flux from airway wall to the lumen, whereas airway NO diffusion and alveolar NO were not affected. The changes in NO dynamics were specific for the subjects who developed an asthmatic reaction, but were independent from the pattern and magnitude of bronchoconstriction. There was no evidence that exhaled NO is modulated by the changes in ADMA concentration.

CONCLUSIONS AND CLINICAL RELEVANCE

Because isocyanate-induced increase in FeNO50 was almost exclusively determined by the increase in NO flux, the use of FeNO50 appears adequate to monitor the exhaled NO dynamics during SIC. FeNO50 measurement may provide additional information to spirometry, because bronchoconstriction and airway inflammatory responses are dissociated.

Staphylococcus lugdunensis, a serious pathogen in periprosthetic joint infections: comparison to Staphylococcus aureus and Staphylococcus epidermidis

OBJECTIVES

The aim of this study was to assess the characteristics of periprosthetic joint infection (PJI) due to Staphylococcus lugdunensis and to compare these to the characteristics of PJI due to Staphylococcus aureus and Staphylococcus epidermidis.

METHODS

A retrospective multicentre study including all consecutive cases of S. lugdunensis PJI (2000-2014) was performed. Eighty-eight cases of staphylococcal PJI were recorded: 28 due to S. lugdunensis, 30 to S. aureus, and 30 to S. epidermidis, as identified by Vitek 2 or API Staph (bioMérieux).

RESULTS

Clinical symptoms were more often reported in the S. lugdunensis group, and the median delay between surgery and infection was shorter for the S. lugdunensis group than for the S. aureus and S. epidermidis groups. Regarding antibiotic susceptibility, the S. lugdunensis strains were susceptible to antibiotics and 61% of the patients could be treated with levofloxacin + rifampicin. The outcome of the PJI was favourable for 89% of patients with S. lugdunensis, 83% with S. aureus, and 97% with S. epidermidis.

CONCLUSION

S. lugdunensis is an emerging pathogen with a pathogenicity quite similar to that of S. aureus. This coagulase-negative Staphylococcus must be identified precisely in PJI, in order to select the appropriate surgical treatment and antibiotics .

Rapid Isolation of Staphylococcus aureus Pathogens from Infected Clinical Samples Using Magnetic Beads Coated with Fc-Mannose Binding Lectin

Here we describe how Staphylococcus aureus bacteria can be rapidly isolated from clinical samples of articular fluid and synovial tissue using magnetic beads coated with the engineered chimeric human opsonin protein, Fc-mannose-binding lectin (FcMBL). The FcMBL-beads were used to capture and magnetically remove bacteria from purified cultures of 12 S. aureus strains, and from 8 articular fluid samples and 4 synovial tissue samples collected from patients with osteoarthritis or periprosthetic infections previously documented by positive S. aureus cultures. While the capture efficiency was high (85%) with purified S. aureus strains grown in vitro, direct FcMBL-bead capture from the clinical samples was initially disappointing (< 5% efficiency). Further analysis revealed that inhibition of FcMBL binding was due to coating of the bacteria by immunoglobulins and immune cells that masked FcMBL binding sites, and to the high viscosity of these complex biological samples. Importantly, capture of pathogens using the FcMBL-beads was increased to 76% efficiency by pretreating clinical specimens with hypotonic washes, hyaluronidase and a protease cocktail. Using this approach, S. aureus bacteria could be isolated from infected osteoarthritic tissues within 2 hours after sample collection. This FcMBL-enabled magnetic method for rapid capture and concentration of pathogens from clinical samples could be integrated upstream of current processes used in clinical microbiology laboratories to identify pathogens and perform antibiotic sensitivity testing when bacterial culture is not possible or before colonies can be detected.

Evaluation of suicide risk in psychiatric patients after discharge. A follow-up study

Introduction

Several studies show that the first period after discharge has an higher suicide risk.

Objectives

Following up psychiatric inpatients after discharge may be important in order to better understand the risk and the protective factors of suicide.

Aim

The aim of our follow-up study is to evaluate the predictive factors of suicide in a sample of psychiatric inpatients after discharge.

Methods

We analyzed the temperament and the levels of hopelessness, depression, suicide risk in a sample of 87 (54% males) inpatients at time T0 (during the hospitalization), T1 (12 months after discharge) and T2 (8 months after T1). We administered the following scales: BHS, MINI, TEMPS, GMDS, CGI.

Results

A statistically significant difference on the risk of suicide with substance abuse was found among patients who were followed up and who refused to participate, respectively at T1 (χ24 = 2.61; P < 0.05) and T2 (χ24 = 1.57; P = 0.05). At T1, 4 patients attempted suicide and 18 showed suicidal ideation. In the second follow-up, 1 patient successful committed suicide, 1 subject attempted suicide and 10 patients showed suicidal ideation. Patients with suicidal ideation at T1 showed higher levels of hopelessness and a diagnosis of bipolar disorder type I (χ24 = 10.28; P = 0.05). Sixty-seven percent of subjects with suicidal ideation showed higher scores in the BHS at T1. Significant differences were found on the anxious temperament at T2 between two groups.

Conclusions

The follow-up could represent a significant strategy to prevent suicide in psychiatric patients.

Disclosure of interest

The authors have not supplied their declaration of competing interest.

Abstract P4-13-15: Dose intensity and efficacy of the combination of everolimus and exemestane (EVE/EXE) in a real world population of hormone receptor positive advanced breast cancer: A multicenter Italian experience

BACKGROUND: Everolimus, an mTOR inhibitor, in combination with exemestane is approved for hormone receptor (HR) positive advanced breast cancer (ABC), after failure of treatment with non-steroidal aromatase inhibitor (NSAI). We assessed the toxicity of the combination and the correlation between dose intensity and response to therapy, in a real world population of ABC from 11 Italian centers. Moreover, we evaluated OS of the whole population, RR and PFS according to line of treatment (from 1rd to 3th and from 4th on).

METHODS: 154 pts were treated with combination of everolimus 10 mg and exemestane 25 mg daily from 05/2011 today. Median age was 62 (47-82). Median time to metastatic disease was 49 months (0-269). Median number of metastatic sites was 2 (55.2% of pts visceral versus 44.8% non visceral disease). N=117 (75.9%) pretreated with HT as adjuvant; N=126 pts (81.8%) treated with HT for advanced disease prior to EVE/EXE, with a median of one line (0-5). N=102 pts (66.2%) treated with chemotherapy for metastatic disease, with a median of one line (0-6) before everolimus treatment.

RESULTS: Sixteen pts received EVE/EXE as 1st line (10.4%), 39 as 2nd (25.3%), 37 as 3rd (24%), 62 as 4th or more (40,3%). Response was evaluable in 127 out of 154 pts; CR/PR/SD respectively 5/27/56 pts. RR according to line (from 1st to 3rd vs ≥ 4th) was respectively 22.8% vs 26.4% (p=0,864). The median PFS for all population (150 pts) was 38 weeks (95% CI: 33-42). The PFS according to line (1st- 3rd vs ≥ 4th) was 38 wks in both subgroups, p=0.73. OS (126/154 pts) was 28 mths (95% CI: 31-38). The most frequent adverse events were collected in the table.

Adverse eventsOverall %Grade 3-4 %Stomatitis55.810.4Hypercholesterolemia47.40.0Asthenia42.95.2Hyperglycemia36.45.8Hypertriglyceridemia29.20.6Anemia28.63.9Peripheral edema24.71.3Rash23.40.6Increased ALT/AST/GGT21.46.5Thrombocytopenia19.53.9Diarrhea18.81.9Weight loss18.21.3Dysgeusia17.50.6Pneumonitis15.61.9Cutaneous toxicity14.90.6Infection14.33.2Neutropenia11.71.9Nausea11.70.0Anorexia (without stomatitis)10.41.3Electrolyte alterations9.71.3Urea/creatinine increase6.51.3Vomiting6.50.0Uric acid increase4.50.0

Median duration of treatment with everolimus 10 mg and 5 mg was respectively 180 (9-854) and 129 days (3-738). Fifty-eight pts (37,6%) never stopped treatment with everolimus 10 mg; 16 pts (10,4%) definitively stopped everolimus for toxicity; 80 pts (52,0%) temporarily interrupted the treatment, resuming at dose level 10 mg (31 pts) or reducing at 5 mg (49 pts). Main reason for discontinuation/interruption was stomatitis G2-G3. RR and PFS evaluated according to dose intensity, 10 mg vs 5 mg, were respectively 25.9% vs 30% p=0.779, 38 wks (27-44) vs 40 wks (31-48) P=0.614

CONCLUSIONS: efficacy in terms of RR and PFS of the combination EVE/EXE is not related to dose intensity (10 mg vs 5 mg), the discontinuation of the treatment is high with the starting dose of 10 mg, the toxicity is consistent with previous phase II-III studies although we collected some different toxicities.

Citation Format: Forcignanò R, Petrucelli L, Cazzaniga ME, Lupo LI, Chiuri VE, Cairo G, De Matteis E, Febbraro A, Giordano G, Campidoglio S, Fabi A, Giampaglia M, Bilancia D, La Verde N, Maiello E, Morritti M, Giotta F, Lorusso V, Scavelli C, Romito S, Cusmai A, Palmiotti G, Tornesello A, Ciccarese M. Dose intensity and efficacy of the combination of everolimus and exemestane (EVE/EXE) in a real world population of hormone receptor positive advanced breast cancer: A multicenter Italian experience. [abstract]. In: Proceedings of the Thirty-Eighth Annual CTRC-AACR San Antonio Breast Cancer Symposium: 2015 Dec 8-12; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2016;76(4 Suppl):Abstract nr P4-13-15.

A case of placental site nodule associated with cervical high-grade squamous intraepithelial lesion

INTRODUCTION

A placental site nodule (PSN) is a remnant of intermediate trophoblast (extravillous trophoblast, EVT) from a previous pregnancy. Usually, this a benign lesion, which once removed, does not require any treatment and does not recur. Although this lesion is related to pregnancy, it may be detected many months or several years after the pregnancy from which it resulted. The lesion represents a degenerative process of EVT. Especially in tissue obtained from curettage, can microscopically mimic aggressive lesions of intermediate trophoblast, such as placental site trophoblastic tumor (PSTT) and epithelioid trophoblastic tumor (ETT), and in an unusual location can pose problems in differential diagnosis with other malignancies, as in the present cervical example.

CASE REPORT

A 36-year-old female, gravida 2, para 1, with a history of early spontaneous abortion two years prior, was submitted to a cervical smear for abnormal uterine bleeding, which showed a cervical high squamous intraepithelial lesion (HSIL) with extension to the endocervical cells. Histologic examination of the endocervical curettage revealed haphazardly distributed fragments of tissue, showing extensive hyalinization and cells of different size with indistinct outlines, organized in small groups, singly, or in cords. Mitotic figures were absent. Immunohistochemical analysis revealed focal positivity to cytokeratin 8 (CK8) and placental alkaline phosphatase and negativity to high molecular weight cytokeratin. The Ki-67 index was low. As a result, the morphological and immunohistochemical findings led to the diagnosis of a PSN.

CONCLUSION

Diagnosis of a PSN in an unusual location also can pose problems in differential diagnosis with other malignancies, as in the present cervical example. In the present case, the cervical location and the association with HSIL might suggest an erroneous diagnosis of cervical invasive squamous carcinoma. Clinical and pathological data, with immunohistochemical study, are mandatory for a correct diagnosis of this lesion.