The Role of Coherent Robot Behavior and Embodiment in Emotion Perception and Recognition During Human-Robot Interaction: Experimental Study

BACKGROUND

Social robots are becoming increasingly important as companions in our daily lives. Consequently, humans expect to interact with them using the same mental models applied to human-human interactions, including the use of cospeech gestures. Research efforts have been devoted to understanding users' needs and developing robot's behavioral models that can perceive the user state and properly plan a reaction. Despite the efforts made, some challenges regarding the effect of robot embodiment and behavior in the perception of emotions remain open.

OBJECTIVE

The aim of this study is dual. First, it aims to assess the role of the robot's cospeech gestures and embodiment in the user's perceived emotions in terms of valence (stimulus pleasantness), arousal (intensity of evoked emotion), and dominance (degree of control exerted by the stimulus). Second, it aims to evaluate the robot's accuracy in identifying positive, negative, and neutral emotions displayed by interacting humans using 3 supervised machine learning algorithms: support vector machine, random forest, and K-nearest neighbor.

METHODS

Pepper robot was used to elicit the 3 emotions in humans using a set of 60 images retrieved from a standardized database. In particular, 2 experimental conditions for emotion elicitation were performed with Pepper robot: with a static behavior or with a robot that expresses coherent (COH) cospeech behavior. Furthermore, to evaluate the role of the robot embodiment, the third elicitation was performed by asking the participant to interact with a PC, where a graphical interface showed the same images. Each participant was requested to undergo only 1 of the 3 experimental conditions.

RESULTS

A total of 60 participants were recruited for this study, 20 for each experimental condition for a total of 3600 interactions. The results showed significant differences (P<.05) in valence, arousal, and dominance when stimulated with the Pepper robot behaving COH with respect to the PC condition, thus underlying the importance of the robot's nonverbal communication and embodiment. A higher valence score was obtained for the elicitation of the robot (COH and robot with static behavior) with respect to the PC. For emotion recognition, the K-nearest neighbor classifiers achieved the best accuracy results. In particular, the COH modality achieved the highest level of accuracy (0.97) when compared with the static behavior and PC elicitations (0.88 and 0.94, respectively).

CONCLUSIONS

The results suggest that the use of multimodal communication channels, such as cospeech and visual channels, as in the COH modality, may improve the recognition accuracy of the user's emotional state and can reinforce the perceived emotion. Future studies should investigate the effect of age, culture, and cognitive profile on the emotion perception and recognition going beyond the limitation of this work.

Pulsed electrolysis - explained

Lately, there has been high interest in electrolysis under dynamic conditions, the so-called pulsed electrolysis. Different studies have shown that in pulsed electrolysis, selectivity towards certain products can be improved compared to steady-state operation. Many groups also demonstrated that the selectivity can be tuned by selection of pulsing profile, potential limits, as well as frequency of the change. To explain the origin of this improvement, some modeling studies have been performed. However, it seems that a theoretical framework to study this effect is still missing. In the present contribution, we suggest a theoretical framework of nonlinear frequency response analysis for the evaluation of the process improvement under pulsed electrolysis conditions. Of special interest is the DC component, which determines how much the mean output value under dynamic conditions will be different from the value under steady-state conditions. Therefore, the DC component can be considered as a measure of process improvement under dynamic conditions compared to the steady-state operation. We show that the DC component is directly dependent on nonlinearities of the electrochemical process and demonstrate how this DC component can be calculated theoretically as well as how it can be obtained from measurements.

A fast magnetic vector characterization method for quasi two-dimensional systems and heterostructures

The use of magnetic vector tomography/laminography has opened a 3D experimental window to access the magnetization at the nanoscale. These methods exploit the dependence of the magnetic contrast in transmission to recover its 3D configuration. However, hundreds of different angular projections are required leading to large measurement times. Here we present a fast method to dramatically reduce the experiment time specific for quasi two-dimensional magnetic systems. The algorithm uses the Beer-Lambert equation in the framework of X-ray transmission microscopy to obtain the 3D magnetic configuration of the sample. It has been demonstrated in permalloy microstructures, reconstructing the magnetization vector field with a reduced number of angular projections obtaining quantitative results. The throughput of the methodology is × 10-× 100 times faster than conventional magnetic vector tomography, making this characterization method of general interest for the community.

Glycerol amendment enhances biosulfidogenesis in acid mine drainage-affected areas: An incubation column experiment

Microbial sulfate (SO₄²⁻) reduction in Acid Mine Drainage (AMD) environments can ameliorate the acidity and extreme metal concentrations by consumption of protons via the reduction of SO₄²⁻ to hydrogen sulfide (H₂S) and the concomitant precipitation of metals as metal sulfides. The activity of sulfate-reducing bacteria can be stimulated by the amendment of suitable organic carbon sources in these generally oligotrophic environments. Here, we used incubation columns (IC) as model systems to investigate the effect of glycerol amendment on the microbial community composition and its effect on the geochemistry of sediment and waters in AMD environments. The ICs were built with natural water and sediments from four distinct AMD-affected sites with different nutrient regimes: the oligotrophic Filón Centro and Guadiana acidic pit lakes, the Tintillo river (Huelva, Spain) and the eutrophic Brunita pit lake (Murcia, Spain). Physicochemical parameters were monitored during 18 months, and the microbial community composition was determined at the end of incubation through 16S rRNA gene amplicon sequencing. SEM-EDX analysis of sediments and suspended particulate matter was performed to investigate the microbially-induced mineral (neo)formation. Glycerol amendment strongly triggered biosulfidogenesis in all ICs, with pH increase and metal sulfide formation, but the effect was much more pronounced in the ICs from oligotrophic systems. Analysis of the microbial community composition at the end of the incubations showed that the SRB Desulfosporosinus was among the dominant taxa observed in all sulfidogenic columns, whereas the SRB Desulfurispora, Desulfovibrio and Acididesulfobacillus appeared to be more site-specific. Formation of Fe³⁺ and Al³⁺ (oxy)hydroxysulfates was observed during the initial phase of incubation together with increasing pH while formation of metal sulfides (predominantly, Zn, Fe and Cu sulfides) was observed after 1–5 months of incubation. Chemical analysis of the aqueous phase at the end of incubation showed almost complete removal of dissolved metals (Cu, Zn, Cd) in the amended ICs, while Fe and SO₄²⁻ increased towards the water-sediment interface, likely as a result of the reductive dissolution of Fe(III) minerals enhanced by Fe-reducing bacteria. The combined geochemical and microbiological analyses further establish the link between biosulfidogenesis and natural attenuation through metal sulfide formation and proton consumption.

Personalizing Care Through Robotic Assistance and Clinical Supervision

By 2030, the World Health Organization (WHO) foresees a worldwide workforce shortfall of healthcare professionals, with dramatic consequences for patients, economies, and communities. Research in assistive robotics has experienced an increasing attention during the last decade demonstrating its utility in the realization of intelligent robotic solutions for healthcare and social assistance, also to compensate for such workforce shortages. Nevertheless, a challenge for effective assistive robots is dealing with a high variety of situations and contextualizing their interactions according to living contexts and habits (or preferences) of assisted people. This study presents a novel cognitive system for assistive robots that rely on artificial intelligence (AI) representation and reasoning features/services to support decision-making processes of healthcare assistants. We proposed an original integration of AI-based features, that is, knowledge representation and reasoning and automated planning to 1) define a human-in-the-loop continuous assistance procedure that helps clinicians in evaluating and managing patients and; 2) to dynamically adapt robot behaviors to the specific needs and interaction abilities of patients. The system is deployed in a realistic assistive scenario to demonstrate its feasibility to support a clinician taking care of several patients with different conditions and needs.

Design and development of a social assistive robot for music and game activities: a case study in a residential facility for disabled people

Cognitive disability strongly reduces people's autonomy in performing desired as well as daily activities. The use of Social Assistive Robots (SARs) for cognitive rehabilitation therapy for disabled people could be a valuable gateway for the residential facility of the future. In this work, we design and develop a SAR that can be used for cognitive therapy proposing music and game activities. The results confirm that participants were positively engaged during the proposed activities and satisfied by the robot, despite the low perception of its usability. Professional caregivers noticed and confirmed the high level of engagement and the positive acceptance of the robot within the session, suggesting future tasks for SAR. Clinical Relevance- The results suggest the potential use of SAR also with disabled people proposing cognitive games as a part of the cognitive rehabilitation program.

POS0731 ASSOCIATION OF PATIENT-REPORTED OUTCOMES WITH TYPE I INTERFERON GENE SIGNATURE FROM THE INTERNATIONAL SYSTEMIC LUPUS ERYTHEMATOSUS PROSPECTIVE OBSERVATIONAL COHORT STUDY (SPOCS)

Background

The aim of the Systemic Lupus Erythematosus Prospective Observational Cohort Study (SPOCS) is to examine the disease course of patients with systemic lupus erythematosus (SLE) in relation to their type I interferon gene signature (IFNGS) status.1 IFNGS has been associated with SLE disease activity.2

Objectives

To identify associations between IFNGS status and patient-reported outcomes (PROs) among patients receiving clinical care while enrolled in SPOCS.

Methods

This noninterventional, international, prospective, observational cohort study included adult patients (≥18 years) with moderate to severe SLE receiving standard therapy. Short Form 36 Health Survey version 2 (SF-36; 0–100), Lupus Quality of Life (LupusQoL; 0–100) and Functional Assessment of Chronic Illness Therapy-Fatigue (FACIT-F; 0–52) were assessed at baseline, 6 months, and 12 months. Higher scores indicate better outcomes. Analyses were stratified by high or low IFNGS status (4-gene test) at baseline.

Results

Of 827 patients, mean (standard deviation [SD]) age was 45.1 (14.0) years, 771 (93%) were female, 525 (63%) were IFNGS high, and 219 (26%) were IFNGS low. IFNGS-high patients were younger than IFNGS-low (mean [SD] 43.0 [13.7] vs 50.7 [12.9] years), had fewer comorbidities (83% vs 91%) and similar baseline disease activity (mean [SD]: SLE Disease Activity Index 2000, 9.8 [4.3] vs 9.2 [5.2]; Physician’s Global Assessment, both 1.5 [0.6]). At baseline, there were some differences in PROs between IFNGS-high and -low patients. At Month 12, changes in most domains did not meet the minimal clinically important difference (MCID). Slight improvement was observed only in selected domains in the IFNGS-high group. This group was younger and had fewer comorbidities at baseline. (Table 1, Figure 1).

Table 1.

PRO Scores at Baseline and Month 12 by IFNGS Status

BaselineMonth 12Change From BaselineMCID (≥)PROTotal (n=810)IFNGS HighIFNGS Low (n=219)Total (n=431)IFNGS HighIFNGS Low (n=147)TotalIFNGS HighIFNGS Low(n=525)(n=279)SF-36Physical Component Summary37.4 (10.5)38.3 (10.5)+35.2 (10.6)139.8 (10.8)41.7 (10.4)+35.7 (10.8)2.3 (7.6)3.0 (8.1)*0.6 (6.4)2.5Mental Component Summary43.2 (11.6)43.6 (11.7)42.7 (11.6)44.9 (11.2)45.9 (10.6)43.4 (11.5)0.9 (9.2)1.4 (9.6)-0.3 (8.4)2.5LupusQoLPhysical health56.4 (27.4)58.1 (27.0)+52.1 (27.7)60.5 (26.9)65.0 (25.3)+52.5 (27.7)2.6 (18.1)5.0 (19.2)*-1.4 (16.4)3.4Pain54.3 (30.3)55.7 (29.8)50.2 (30.8)61.4 (28.5)66.0 (26.5)+52.6 (29.1)5.4 (23.8)8.1 (25.2)0.7 (21.3)8.5Planning61.4 (32.2)63.7 (31.8)+57.0 (32.2)66.3 (29.6)70.8 (27.8)+58.5 (30.8)2.9 (24.4)4.2 (24.7)-1.0 (22.9)6.5Intimate relationships58.0 (34.8)61.2 (34.1)+50.9 (34.8)59.8 (33.9)65.6 (32.3)+50.6 (34.7)-0.6 (24.5)-0.7 (25.9)-0.8 (22.3)9.2Burden to others50.7 (32.6)50.7 (32.6)50.4 (33.5)56.4 (30.7)59.7 (29.5)51.8 (31.7)3.1 (25.4)5.6 (26.0)*0.1 (23.9)5.3Emotional health66.3 (25.6)66.1 (26.0)67.8 (24.8)71.1 (24.7)72.9 (23.8)69.2 (24.7)1.8 (19.4)3.1 (20.3)-0.5 (18.1)3.4Body image62.6 (29.4)61.0 (30.1)66.4 (28.3)68.2 (27.6)70.3 (27.4)65.1 (27.0)2.0 (23.9)*4.1 (24.3)*-0.4 (22.1)1.1Fatigue48.6 (27.8)49.9 (27.6)45.5 (28.2)53.7 (26.9)57.4 (26.2)+46.9 (25.7)2.1 (19.3)3.5 (20.0)-0.9 (18.7)3.9FACIT-F25.8 (13.4)26.9 (13.4)+23.4 (12.9)28.7 (13.2)31.1 (12.7)+24.6 (12.9)2.3 (9.6)3.2 (10.2)0.6 (8.5)4.0

Data are mean (SD). Asterisks (*) indicate changes from baseline ≥ MCID. +Comparison between high and low IFNGS status by Mann-Whitney U test (nominal p-value<0.01).

Data for n are patients per subgroup and do not reflect responses per PRO assessment.

Conclusion

In this cohort study, patients with moderate to severe SLE had poor health status, health-related quality of life, and fatigue. A clinically meaningful change was not met in most PROs, suggesting patients continue to have a high need for improved treatment options.

References

[1]Hammond ER. BMJ Open 2020;10:e036563.

[2]Dall’era MC. Ann Rheum Dis 2005;64:1692–7.

Acknowledgements

Writing assistance by Shelley Harris, PhD (Fishawack). This study was sponsored by AstraZeneca.

Disclosure of Interests

Martin Aringer Speakers bureau: AbbVie, AstraZeneca, BMS, Boehringer Ingelheim, Chugai, HEXAL, Lilly, MSD, Mylan, Novartis, Roche, Sanofi, UCB, Consultant of: AbbVie, AstraZeneca, BMS, Boehringer Ingelheim, Galapagos, GSK, Pfizer, Roche, Sanofi, Laurent Arnaud Speakers bureau: AstraZeneca, Consultant of: AstraZeneca, Grant/research support from: AstraZeneca, Christine Peschken Consultant of: AstraZeneca, GSK, Grant/research support from: AstraZeneca, Richard Furie Speakers bureau: AstraZeneca, Genentech, Consultant of: AstraZeneca, Grant/research support from: AstraZeneca, Eric F. Morand Speakers bureau: GSK, Novartis, Paid instructor for: AstraZeneca, Biogen, Eli Lilly, Consultant of: AstraZeneca, Biogen, Bristol Myers Squibb, Eli Lilly, EMD Serono, Genentech, GSK, Janssen, Servier, Grant/research support from: Abbvie, AstraZeneca, Bristol Myers Squibb, GSK, Janssen, Caroline Seo Shareholder of: AstraZeneca, Employee of: AstraZeneca, Eleni Rapsomaniki Employee of: AstraZeneca, Jonatan Hedberg Shareholder of: AstraZeneca, Employee of: AstraZeneca, Jacob Knagenhjelm Shareholder of: AstraZeneca, Employee of: AstraZeneca, Tina Grünfeld Eén Shareholder of: AstraZeneca, Employee of: AstraZeneca, Barnabas Desta Shareholder of: AstraZeneca, Employee of: AstraZeneca, Raj Tummala Shareholder of: AstraZeneca, Employee of: AstraZeneca, Alessandro Sorrentino Shareholder of: Galapagov, Abbott Laboratories, Gilead Sciences, Moderna, Employee of: Janssen, Sanofi, AstraZeneca, Heide Stirnadel-Farrant Shareholder of: AstraZeneca, GSK, Employee of: AstraZeneca

POS0733 DISCORDANCE BETWEEN PATIENT GLOBAL ASSESSMENT AND PHYSICIAN GLOBAL ASSESSMENT OF DISEASE ACTIVITY IN THE MODERATE TO SEVERE SYSTEMIC LUPUS ERYTHEMATOSUS PROSPECTIVE OBSERVATIONAL COHORT STUDY (SPOCS)

Background

Emphasis in clinical research and care has been placed on the need to include evaluations that reflect the perspectives of both patients and physicians.

Objectives

The goal of this study was to analyze patient and physician assessments and to determine characteristics associated with concordance and discordance of these assessments.

Methods

Baseline data of patients with moderate to severe SLE enrolled in the Systemic Lupus Erythematosus Prospective Observational Cohort Study (SPOCS)1 were analyzed. Physician’s Global Assessment (PGA) representing disease activity during the 4-week interval prior to baseline and Patient Global Assessment (PtGA) representing the impact of disease during a 1-month interval prior to baseline were independently scored on visual analogue scales (PGA 0-3; PtGA 0-100). Spearman’s rank (rho) was calculated to assess their correlation. A difference between PGA and PtGA scores ≥25 points defined discordance (after rescaling PGA to 0–100).2 Baseline characteristics associated with concordance and discordance were assessed.

Results

827 patients were included in this analysis. At baseline, the mean PGA score was 1.5 (SD 0.6, n=824), and the mean PtGA score was 51.1 (SD 25.5, n=790). The correlation between PGA and PtGA was low (rho=0.19, P<0.001, n=787) (Figure 1). PGA and PtGA scores were discordant in 301 (38%) of patients. Among those patients exceeding the threshold defining discordance, 152 (19%) had higher PGA scores than PtGA scores, and 149 (19%) had higher PtGA scores than PGA scores. The subgroup of PGA-higher discordant patients had higher mean SLEDAI-2K scores, greater serological activity, and more frequent type 1 interferon gene signature positivity, whereas PtGA-higher discordant patients were more likely to be using analgesics and/or anti-depressants, had higher mean BMI and were less likely to be employed (Table 1).

Table 1.

Characteristics associated with PGA and PtGA scoresa

Concordant (N=486)PGA higher (N=152)PtGA higher (N=149)P-value-1bP-value-2bAge, years45.5 (13.7)42.7 (14.4)46.4 (14.0)0.0220.043Race, White326 (71%)96 (66%)94 (69%)0.1920.360BMI, kg/m227.6 (7.2)25.6 (5.4)27.2 (6.4)0.0320.011Employed249 (51%)80 (53%)51 (34%)0.0010.001SLEDAI-2K total score10.0 (4.8)10.8 (5.1)8.2 (3.0)<0.001<0.001Positive ANA/anti-dsDNA436 (90%)143 (94%)127 (85%)0.0120.041Low Complement (C3 or C4)132 (46%)58 (60%)41 (43%)0.0140.026High IFNGS313 (71%)101 (78%)89 (64%)0.0140.049≥1 mild flare115 (24%)20 (13%)45 (30%)<0.0010.001≥1 moderate flare88 (18%)37 (24%)23 (16%)0.0570.120≥1 severe flare39 (8%)11 (7%)15 (10%)0.3720.628OCS daily dose0.0520.129No OCS214 (44%)57 (38%)62 (42%)>0–7.5 mg139 (29%)38 (25%)52 (35%)>7.5–15 mg75 (15%)37 (25%)18 (12%)>15 mg57 (12%)19 (13%)17 (11%)Immunosuppressants271 (56%)80 (53%)75 (50%)0.6900.467Biologics106 (22%)25 (16%)19 (13%)0.3640.032Analgesics152 (31%)22 (14%)46 (31%)<0.001<0.001Antidepressants123 (25%)31 (20%)52 (35%)0.0050.013

aMean (SD) for continuous, n (%) for nominal variables. Missing data was <10% of patients for the variables displayed. Denominators exclude missing data. bP-value-1 compares PGA higher vs PtGA higher. P-value-2 compares all 3 groups. Based on the chi-squared test for categorical variables and t-test or ANOVA for continuous variables.

IFNGS, type 1 interferon gene signature; OCS, oral corticosteroid; PGA, physician global assessment; PtGA, patient global assessment

Conclusion

Low correlation between PGA and PtGA suggests both should be used to acquire a broad perspective of the impact of disease on the overall health of patients. Different baseline characteristics were associated with the PGA-higher compared to the PtGA-higher discordant subgroups.

References

[1]Hammond ER, et al. BMJ Open. 2020;10:e036563.

[2]Challa DNV, et al. Rheumatol Ther. 2017;4:201–8.

Acknowledgements

Editing assistance by Rebecca S. Jones, PhD (Fishawack). This study was sponsored by AstraZeneca.

Disclosure of Interests

Laurent Arnaud Speakers bureau: AstraZeneca, Consultant of: AstraZeneca, Grant/research support from: AstraZeneca, Richard Furie Speakers bureau: AstraZeneca, Genentech, Consultant of: AstraZeneca, Grant/research support from: AstraZeneca, Eric F. Morand Speakers bureau: GSK, Novartis, Paid instructor for: AstraZeneca, Biogen, Eli Lilly, Consultant of: AstraZeneca, Biogen, Bristol Myers Squibb, Eli Lilly, EMD Serono, Genentech, GSK, Janssen, Servier, Grant/research support from: Abbvie, AstraZeneca, Bristol Myers Squibb, GSK, Janssen, Christine Peschken Consultant of: AstraZeneca, GSK, Grant/research support from: AstraZeneca, Martin Aringer Speakers bureau: AbbVie, AstraZeneca, BMS, Boehringer Ingelheim, Chugai, HEXAL, Lilly, MSD, Mylan, Novartis, Roche, Sanofi, UCB, Consultant of: AbbVie, AstraZeneca, BMS, Boehringer Ingelheim, Galapagos, GSK, Pfizer, Roche, Sanofi, Eleni Rapsomaniki Employee of: AstraZeneca, Jonatan Hedberg Shareholder of: AstraZeneca, Employee of: AstraZeneca, Jacob Knagenhjelm Shareholder of: AstraZeneca, Employee of: AstraZeneca, Caroline Seo Shareholder of: AstraZeneca, Employee of: AstraZeneca, Tina Grünfeld Eén Shareholder of: AstraZeneca, Employee of: AstraZeneca, Barnabas Desta Shareholder of: AstraZeneca, Employee of: AstraZeneca, Alessandro Sorrentino Shareholder of: Galapagov, Abbott LAboratories, Gilead Sciences, Moderna, Employee of: Janssen, Sanofi, AstraZeneca, Raj Tummala Shareholder of: AstraZeneca, Employee of: AstraZeneca, Heide Stirnadel-Farrant Shareholder of: AstraZeneca, GSK, Employee of: AstraZeneca

Emotion Recognizing by a Robotic Solution Initiative (EMOTIVE Project)

Background: Emotion recognition skills are predicted to be fundamental features in social robots. Since facial detection and recognition algorithms are compute-intensive operations, it needs to identify methods that can parallelize the algorithmic operations for large-scale information exchange in real time. The study aims were to identify if traditional machine learning algorithms could be used to assess every user emotions separately, to relate emotion recognizing in two robotic modalities: static or motion robot, and to evaluate the acceptability and usability of assistive robot from an end-user point of view. Methods: Twenty-seven hospital employees (M = 12; F = 15) were recruited to perform the experiment showing 60 positive, negative, or neutral images selected in the International Affective Picture System (IAPS) database. The experiment was performed with the Pepper robot. Concerning experimental phase with Pepper in active mode, a concordant mimicry was programmed based on types of images (positive, negative, and neutral). During the experimentation, the images were shown by a tablet on robot chest and a web interface lasting 7 s for each slide. For each image, the participants were asked to perform a subjective assessment of the perceived emotional experience using the Self-Assessment Manikin (SAM). After participants used robotic solution, Almere model questionnaire (AMQ) and system usability scale (SUS) were administered to assess acceptability, usability, and functionality of robotic solution. Analysis wasperformed on video recordings. The evaluation of three types of attitude (positive, negative, andneutral) wasperformed through two classification algorithms of machine learning: k-nearest neighbors (KNN) and random forest (RF). Results: According to the analysis of emotions performed on the recorded videos, RF algorithm performance wasbetter in terms of accuracy (mean ± sd = 0.98 ± 0.01) and execution time (mean ± sd = 5.73 ± 0.86 s) than KNN algorithm. By RF algorithm, all neutral, positive and negative attitudes had an equal and high precision (mean = 0.98) and F-measure (mean = 0.98). Most of the participants confirmed a high level of usability and acceptability of the robotic solution. Conclusions: RF algorithm performance was better in terms of accuracy and execution time than KNN algorithm. The robot was not a disturbing factor in the arousal of emotions.

Can assistive technology support social services during Covid-19 emergency? Barriers and opportunities

During the COVID-19 emergency, most domiciliary social services were suspended to avoid the risk of contagion, leaving older people at a greater risk of social isolation. Assistive technology has the potential to support the work of social professionals in promoting social inclusion and assistance of the older people. In this context, this paper aims to investigate the expectations of social operators toward assistive technology before and during the COVID-19 emergency. It also explores how the said emergency could guide us to implement social services in the future, including a discussion on the barriers to the adoption of assistive technologies. A total of 72 social professionals participated in this study comprising of three phases: two online questionnaires and one semi structured interview. In the first two phases, the two online questionnaires were administered before and during the COVID-19 emergency to 62 social professionals. In the third phase, 10 social workers were interviewed to discuss the results of the previous questionnaires to gain an in-depth understanding. The results highlight that the COVID-19 emergency is responsible for an increased perceived need of services involving telepresence, proposing a hybrid paradigm of assistance with both remote and in-presence assistance. Furthermore, the identified barriers to technology adoption are lack of organizational structure and ready-to-use technology. As for the facilitators for the technology adoption, social workers suggested investing in education and training of social professionals to reduce skepticism towards the usefulness of technology. The social professionals involved in this study highlight a generally positive view of technology in supporting their work. Finally, the lessons learned is also presented as a guideline for researchers in this field.

Beta-blocker/ACE inhibitor therapy differentially impacts the steady state signaling landscape of failing and non-failing hearts

Background

The molecular underpinnings of heart failure with reduced ejection fraction (HFrEF) involves a complex remodeling of the contractile, metabolic and electrical functions. Current pharmacotherapy for patients presenting HFrEF includes combination of angiotensin-converting enzyme inhibitors (ACEi) and β-adrenergic receptor blockers (β-AR blockers). Yet, a knowledge gap exists regarding the molecular changes accompanying such treatment.

Purpose

The present study takes an omics approach to study protein and phosphorylation signaling derangement in HFrEF and to define the global changes resulting from treatment with β-AR blocker (metoprolol) and ACE inhibitor (enalapril) in control- and HFrEF hearts.

Methods and results

For induction of HFrEF, a tight and permanent ligature was applied to constrict the transverse aorta in male C57BL6 mice. Eight weeks post-surgery, an osmotic pump was implanted delivering either vehicle or treatment (enalapril, ACE inhibitor, and metoprolol, β-AR blocker) for a two week period. The proteome- and phosphoproteome of left ventricular tissue was resolved using high-resolution liquid chromatography-mass spectrometry. The resulting dataset covered 6,004 proteins and 14,967 phosphorylation events. HFrEF was characterized by profound downregulation of mitochondrial proteins coupled with derangement of β-adrenergic and pyruvate dehydrogenase signaling. Upon treatment, phosphorylation changes consequent to HFrEF were reversed, including a reversal of Pdhk4 activity. In controls, treatment mainly led to downregulation of canonical PKA signaling. Overall, the signaling response elicited by treatment was profoundly different for failing than for control hearts.

Conclusions

We used state-of-the-art proteomics and phosphoproteomics approaches to analyze changes in protein abundance and phosphorylation state of the left ventricle resulting from combination therapy with a β-AR blocker and an ACE inhibitor in failing and non-failing hearts. Our observation of divergent signaling outcomes depending on the disease state of the heart underscores the importance of evaluating drug effects within the context of the specific conditions present in the recipient heart.

Funding Acknowledgement

Type of funding sources: Foundation. Main funding source(s): The Danish Council for independent ResearchLundbeck FoundationFondation Leducq Transatlantic Network of Excellence

The Rise of the Roboid

The aim of this paper is to analyze a new phenomenon that is emerging in the field of social robotics, which we name as “roboid”. The roboid is a robot that is still at the prototype stage but claims to be fully functioning. We argue that the roboid has been created to handle a new phase between the prototyping and the commercialization of robots. In this intermediate phase, a wide-spread promotional campaign is organized by robot producers, with the purpose of understanding the desires, needs, and suggestions of potential customers. We present the first case of a a highly human-like roboid named Sophia. We carried out the visual analysis of the content and the content-agnostic factors of a selection of 15 videos uploaded on YouTube on the social robot Sophia and a qualitative analysis of the textual component of these videos to investigate a selected part of the promotional campaign on Sophia. Furthermore, on the 23,810 comments that users have posted on these videos, we applied quantitative analysis to explore the observers’ opinions about Sophia. Results highlight that: (1) a powerful but potentially ridiculous narrative has been used to build the rhetoric of Sophia; (2) the comments on the videos are too poor to enable a co-construction of this social robot with the audiences (implicit intention of Hanson Robotics); (3) the introduction of the roboid might be a very good solution to reduce the uncertainties that may occur when a new robot moves directly from the laboratory to the market.

The chaperonin CCT controls T cell receptor-driven 3D configuration of centrioles

T lymphocyte activation requires the formation of immune synapses (IS) with antigen-presenting cells. The dynamics of membrane receptors, signaling scaffolds, microfilaments, and microtubules at the IS determine the potency of T cell activation and subsequent immune response. Here, we show that the cytosolic chaperonin CCT (chaperonin-containing TCP1) controls the changes in reciprocal orientation of the centrioles and polarization of the tubulin dynamics induced by T cell receptor in T lymphocytes forming an IS. CCT also controls the mitochondrial ultrastructure and the metabolic status of T cells, regulating the de novo synthesis of tubulin as well as posttranslational modifications (poly-glutamylation, acetylation, Δ1 and Δ2) of αβ-tubulin heterodimers, fine-tuning tubulin dynamics. These changes ultimately determine the function and organization of the centrioles, as shown by three-dimensional reconstruction of resting and stimulated primary T cells using cryo-soft x-ray tomography. Through this mechanism, CCT governs T cell activation and polarity.

Characterization of sustainable polyhydroxyls, produced from bio-based feedstock, and polyurethane and copolymer urethane-amide foams

This manuscript presents data related to the research article entitled "Synthesis and characterization of sustainable polyurethane foams based on polyhydroxyls with different terminal groups" (DOI: 10.1016/j.polymer.2018.06.077) [1]. We provide Supplementary data on the chemical properties, in terms of FTIR characterization, of polyhydroxyls produced starting from bio-based feedstock (biosuccinic acid and 1,4 butandiol) and thermal properties (glass transition temperature-Tg and thermal degradation behavior) of polyurethane and copolymer urethane-amide foams manufactured from the aforementioned polyhydroxyls. The FTIR characterization elucidates the chemical structure of polyhydroxyls and allows to make some hypothesis on their reaction routes with the isocyanate molecules. The thermal characterization revealed that the addition of bio-based polyhydroxyls to the sample formulations improves both the glass transition and degradation temperature of the foams. These foamed products exhibit potential performances to be applied as a substitute for conventional polyurethane foams.

Human PRDM2: Structure, function and pathophysiology

PRDM2/RIZ is a member of a superfamily of histone/protein methyltransferases (PRDMs), which are characterized by the conserved N-terminal PR domain, with methyltransferase activity and zinc finger arrays at the C-terminus. Similar to other family members, two main protein types, known as RIZ1 and RIZ2, are produced from the PRDM2 locus differing by the presence or absence of the PR domain. The imbalance in their respective amounts may be an important cause of malignancy, with the PR-positive isoform commonly lost or downregulated and the PR-negative isoform always being present at higher levels in cancer cells. Interestingly, the RIZ1 isoform also represents an important target of estradiol action downstream of the interaction with hormone receptor. Furthermore, the imbalance between the two products could also be a molecular basis for other human diseases. Thus, understanding the molecular mechanisms underlying PRDM2 function could be useful in the pathophysiological context, with a potential to exploit this information in clinical practice.

Pain relief for outpatient hysteroscopy

BACKGROUND

Hysteroscopy is increasingly performed in an outpatient setting. Pain is the primary reason for abandonment of procedure or incomplete assessment. There is no consensus upon routine use of analgesia during hysteroscopy.

OBJECTIVES

To assess the effectiveness and safety of pharmacological interventions for pain relief in women undergoing outpatient hysteroscopy, compared with placebo, no treatment or other pharmacological therapies.

SEARCH METHODS

In September 2016 we searched the Cochrane Gynaecology and Fertility (CGF) Trials Register, CENTRAL, MEDLINE, Embase, PsycINFO, CINAHL and two trials registers (ClinicalTrials.gov and WHO ICTRP), together with reference checking and contact with study authors and experts.

SELECTION CRITERIA

We included randomised controlled trials (RCTs) comparing use of pharmacological interventions with other pharmacological interventions and pharmacological interventions versus placebo or no treatment.

DATA COLLECTION AND ANALYSIS

We used standard methodological procedures expected by Cochrane. Our primary outcome was mean pain score.

MAIN RESULTS

We included 32 RCTS (3304 participants), of which only 19 reported data suitable for analysis. Most studies were at unclear or high risk of bias in most of the domains assessed. The evidence was low or very low quality, mainly due to risk of bias and imprecision. Baseline pain scores were relatively low in all groups. Analgesic versus placebo or no treatment Local anaesthetics Local anaesthetics reduced mean pain scores during the procedure [(SMD) -0.29, 95% CI -0.39 to -0.19, 10 RCTs, 1496 women, I2 = 80%, low-quality evidence)] and within 30 minutes (SMD 0.50, 95% CI -0.67 to -0.33, 5 RCTs, 545 women, I2 = 43%, low-quality evidence). This translates to a difference of up to 7 mm on a 0-10 cm visual analogue scale (VAS) during the procedure and up to 13 mm within 30 minutes, which is unlikely to be clinically meaningful. There was no clear evidence of a difference between the groups in mean pain scores after > 30 minutes (SMD -0.11, 95% CI -0.30 to 0.07, 4 RCTs, 450 women, I2 = 0%, low-quality evidence), or in rates of vasovagal reactions (OR 0.70, 95% CI 0.43 to 1.13, 8 RCTs, 1309 women, I2 = 66%, very low-quality evidence). There was insufficient evidence to determine whether there was a difference in rates of non-pelvic pain (OR 1.76, 95% CI 0.53 to 5.80, 1 RCT, 99 women, very low-quality evidence). Nonsteroidal anti-inflammatory drugs (NSAIDs) There was insufficient evidence to determine whether there was a difference between the groups in mean pain scores during the procedure (SMD -0.18, 95% CI -0.35 to 0.00, 3 RCTs, 521 women, I2 = 81%, low-quality evidence). Pain scores were lower in the NSAIDs group within 30 minutes (SMD -0.25, 95% CI -0.46 to -0.04, 2 RCTs, 340 women, I2=29%, low-quality evidence) and at over 30 minutes (SMD -0.27, 95% CI -0.49 to -0.05, 2 RCTs, 321 women, I2 = 78%, low-quality evidence). This equates to maximum differences of under 7.5 mm on a 0-10 cm scale, which are unlikely to be clinically significant. One RCT (181 women) reported adverse events: there was insufficient evidence to determine whether there was a difference between the groups in vasovagal reactions (OR 0.76, 95% CI 0.20 to 2.94, very low-quality evidence). For other reported adverse events (non pelvic pain and allergic reactions) evidence was lacking. Opioids One RCT utilised sublingual buprenorphine and one utilised oral tramadol. Data on pain scores during the procedure were unsuitable for pooling due to inconsistency. Tramadol was associated with a benefit of up to 22 mm on a 0-10 cm scale (SMD -0.76, 95% CI -1.10 to -0.42, 1 RCT, 140 women). However, the effect estimate for this outcome for sublingual opioids did not support a benefit from the intervention (SMD 0.08, 95% CI -0.22 to 0.39, 164 women). Compared with placebo, the pain score within 30 minutes of the procedure was reduced in the tramadol group, with a difference of up to 17mm on a 0-10cm scale (SMD -0.57, 95% CI -0.91 to -0.23 , 1 RCT, 140 women, low-quality evidence. There was no clear evidence of a difference between the tramadol and placebo groups at over 30 minutes (SMD -0.17, 95% CI -0.51 to 0.16, 1 RCT, 140 women, low-quality evidence). Nausea and vomiting occurred in 39% of the buprenorphine group, and in none of the placebo group (OR 107.55, 95% CI 6.44 to 1796.46) Analgesic versus any other analgesic Some comparisons did not report pain scores at all time frames of interest, and none reported data on adverse events. One RCT (84 women) compared local intracervical anaesthesia versus combined intracervical and paracervical anaesthesia. Pain scores were higher in the group with local intracervical anaesthesia during the procedure (SMD 4.27, 95% CI 3.49 to 5.06, very low-quality evidence), within 30 minutes (SMD 1.55, 95% CI 1.06 to 2.05, very low-quality evidence) and at more than 30 minutes (SMD 3.47, 95% CI 2.78 to 4.15, very low-quality evidence). This translates to a possible benefit in the combined group of up to 12 mm on a 0-10 cm scale during the procedure. Benefits at longer follow-up were smaller. One RCT compared antispasmodic + NSAID versus local paracervical anaesthesia. Pain scores were lower in the NSAID group than in the local anaesthesia group (during procedure: SMD -1.40, 95% CI -1.90 to -0.91; >30 minutes after procedure: SMD -0.87, 95% CI -1.33 to -0.41; 80 women, very low-quality evidence). This suggests a possible benefit of during the procedure of up to 23 mm on a 0-10 VAS scale and up to 11 mm >30 minutes after the procedure. Other comparisons included local intracervical anaesthesia versus combined intracervical, paracervical and topical anaesthesia, and opioid versus NSAIDs. Findings were inconclusive.

AUTHORS' CONCLUSIONS

There was no consistent good-quality evidence of a clinically meaningful difference in safety or effectiveness between different types of pain relief compared with each other or with placebo or no treatment in women undergoing outpatient hysteroscopy.

Differences between graphene and graphene oxide in gelatin based systems for transient biodegradable energy storage applications

A comparison between graphene flakes and graphene oxide as filler in gelatin based systems for low-cost transient biodegradable energy storage applications has been carried out. The two bio-composites have been prepared and characterized by rheological measurements, cyclic voltammetry measurements, chronopotentiometry measurements and impedance spectroscopy. Differences in dielectric and mechanical properties have been correlated to the different structural organizations determinate by the hydrophobic/hydrophilic character of the used filler. In particular, the addition of the graphene oxide to the gelatin causes an increase in the elastic modulus with a parallel increase in the mechanical stability with time as compared to the composites obtained by adding graphene. Conversely, the surface capacitance is slightly increased by the graphene oxide addition compared to the pure gelatin sample. On the other hand, the introduction of the graphene flakes into the gelatin leads to a marked increase of the dielectric properties of the resulting bio-composite.

Light irradiation tuning of surface wettability, optical, and electric properties of graphene oxide thin films

In this work the preparation of flexible polymeric films with controlled electrical conductivity, light transmission and surface wettability is reported. A drop casted graphene oxide thin film is photo-reduced at different levels by UV light or laser irradiation. Optical microscopy, IR spectroscopy, electrical characterization, Raman spectroscopy and static water contact angle measurements are used in order to characterize the effects of the various reduction methods. Correlations between the optical, electrical and structural properties are reported and compared to previous literature results. These correlations provide a useful tool for independently tuning the properties of these films for specific applications.

Optical pseudomotors for soft x-ray beamlines

Optical elements of soft x-ray beamlines usually have motorized translations and rotations that allow for the fine alignment of the beamline. This is to steer the photon beam at some positions and to correct the focus on slits or on sample. Generally, each degree of freedom of a mirror induces a change of several parameters of the beam. Inversely, several motions are required to actuate on a single optical parameter, keeping the others unchanged. We define optical pseudomotors as combinations of physical motions of the optical elements of a beamline, which allow modifying one optical parameter without affecting the others. We describe a method to obtain analytic relationships between physical motions of mirrors and the corresponding variations of the beam parameters. This method has been implemented and tested at two beamlines at ALBA, where it is used to control the focus of the photon beam and its position independently.

Nanoscale imaging of buried topological defects with quantitative X-ray magnetic microscopy

Advances in nanoscale magnetism increasingly require characterization tools providing detailed descriptions of magnetic configurations. Magnetic transmission X-ray microscopy produces element specific magnetic domain images with nanometric lateral resolution in films up to ∼100 nm thick. Here we present an imaging method using the angular dependence of magnetic contrast in a series of high resolution transmission X-ray microscopy images to obtain quantitative descriptions of the magnetization (canting angles relative to surface normal and sense). This method is applied to 55–120 nm thick ferromagnetic NdCo₅ layers (canting angles between 65° and 22°), and to a NdCo₅ film covered with permalloy. Interestingly, permalloy induces a 43° rotation of Co magnetization towards surface normal. Our method allows identifying complex topological defects (merons or ½ skyrmions) in a NdCo₅ film that are only partially replicated by the permalloy overlayer. These results open possibilities for the characterization of deeply buried magnetic topological defects, nanostructures and devices.

Transmission X-ray microscopy allows for the imaging of magnetic domains in thin film materials. Here, the authors exploit the angular dependence of the magnetic contrast to extract out-of-plane canting angles of stripe domains and topological defects in NdCo₅ films buried under a NiFe layer.

Fast mold surface temperature evolution: relevance of asymmetric surface heating for morphology of iPP molded samples

It is widely accepted that mold temperature has a strong effect on the amount of molecular orientation and morphology developed in a non-isothermal flowing melt.

Performance of different commercial methods for determining minimum inhibitory concentrations of glycopeptides and linezolid against blood isolates of Staphylococcus aureus

The aim of this study was to determine the accuracy of commercial systems (VITEK^® 2, Etest and Sensititre^®) in determining the minimum inhibitory concentrations of vancomycin, teicoplanin and linezolid of Staphylococcus aureus strains and to evaluate the reproducibility of each system in a clinical microbiology laboratory. In total, 115 strains of S. aureus isolated from blood cultures were tested with all three commercial methods as well as the broth microdilution method, which is designated as the standard for glycopeptides and linezolid. Fourteen different S. aureus strains were included in a reproducibility test for all methods and antibiotics. For these strains, antimicrobial susceptibility testing was repeated 10 times on different days with all four methods, each time using the same inoculum. All three commercial methods exhibited similar performance in categorisation of nearly all of the meticillin-susceptible S. aureus (MSSA) isolates. Discrepancies were registered for meticillin-resistant S. aureus (MRSA); 2.5% of the strains in the intermediate or resistant category with the VITEK 2 system were not recognised as resistant by Etest and Sensititre. Moreover, none of the three commercial methods provided accurate results compared with homemade broth microdilution. Reproducibility of vancomycin and teicoplanin was 100% with VITEK 2 and Sensititre and 98.75% with Etest. Microdilution showed a reproducibility of 95.6% with vancomycin and 83.1% with teicoplanin. In contrast to previous reports, the best agreement with microdilution was exhibited by VITEK 2 both for MSSA and MRSA. For the antibiotics tested, the best reproducibility was obtained with the VITEK 2 and Sensititre systems.

Predicting prostate biopsy outcome: prostate health index (phi) and prostate cancer antigen 3 (PCA3) are useful biomarkers

Indication for prostate biopsy is presently mainly based on prostate-specific antigen (PSA) serum levels and digital-rectal examination (DRE). In view of the unsatisfactory accuracy of these two diagnostic exams, research has focused on novel markers to improve pre-biopsy prostate cancer detection, such as phi and PCA3. The purpose of this prospective study was to assess the diagnostic accuracy of phi and PCA3 for prostate cancer using biopsy as gold standard. Phi index (Beckman coulter immunoassay), PCA3 score (Progensa PCA3 assay) and other established biomarkers (tPSA, fPSA and %fPSA) were assessed before a 18-core prostate biopsy in a group of 251 subjects at their first biopsy. Values of %p2PSA and phi were significantly higher in patients with PCa compared with PCa-negative group (p<0.001) and also compared with high grade prostatic intraepithelial neoplasia (HGPIN) (p<0.001). PCA3 score values were significantly higher in PCa compared with PCa-negative subjects (p<0.001) and in HGPIN vs PCa-negative patients (p<0.001). ROC curve analysis showed that %p2PSA, phi and PCA3 are predictive of malignancy. In conclusion, %p2PSA, phi and PCA3 may predict a diagnosis of PCa in men undergoing their first prostate biopsy. PCA3 score is more useful in discriminating between HGPIN and non-cancer.

The emerging role of large immunophilin FK506 binding protein 51 in cancer

FK506 binding protein 51 (FKBP51) is an immunophilin physiologically expressed in lymphocytes. Very recently, aberrant expression of this protein was found in melanoma; FKBP51 expression correlates with melanoma aggressiveness and is maximal in metastatic lesions. FKBP51 promotes NF-κB activation and is involved in the resistance to genotoxic agents, including anthracyclines and ionizing radiation. FKBP51 is a cochaperone with peptidyl-prolyl isomerase activity that regulates several biological processes through protein-protein interaction. There is increasing evidence that FKBP51 hyperexpression is associated with cancer and this protein has a relevant role in sustaining cell growth, malignancy, and resistance to therapy. There is also evidence that FKBP ligands are potent anticancer agents, in addition to their immunosuppressant activity. In particular, rapamycin and its analogs have shown antitumor activity across a variety of human cancers in clinical trials. Although, classically, rapamycin actions are ascribed to inhibition of mTOR, recent studies indicate FKBP51 is also an important molecular determinant of the drug's anticancer activity. The aim of this article is to review the functions of FKBP51, especially in view of the recent findings that this protein is a potential oncogene when deregulated and a candidate target for signaling therapies against cancer.

Short communication: technological and genotypic comparison between Streptococcus macedonicus and Streptococcus thermophilus strains coming from the same dairy environment

The species Streptococcus thermophilus is widely used for the preparation of several dairy products, and its technological contribution is clear. On the other hand, although Streptococcus macedonicus was first described more than 10 yr ago and, despite the scientific interest around this issue, the exact role of Strep. macedonicus in cheese making has yet to be clarified. In this study, 121 strains belonging to both species and isolated from the same dairy environment were genetically characterized by random amplification of polymorphic DNA (RAPD)-PCR and compared for the main biochemical features of technological interest, such as acid production, galactose utilization, citrate metabolism, exopolysaccharide production, and lipolytic, ureolytic, exocellular proteolytic, and decarboxylasic activities. Analysis by RAPD-PCR highlighted a remarkable genotypic heterogeneity among strains in both species, and, at a similarity level of 78%, all the isolates and reference strains of Strep. thermophilus grouped together and were well separated from the strains of Strep. macedonicus, confirming that these 2 species are different microbial entities. Comparison between genetic and phenotypic or biotechnological data did not reveal any relationships.

Iterative retrieval of one-dimensional x ray wave field using a single intensity measurement

The problem of retrieving a complex function from the modulus of its Fourier transform has non-unique solutions in one dimension. Therefore iterative phase retrieval methods cannot in general be confidently applied to one-dimensional problems, due to the presence of ambiguities. We present a method for a posteriori reduction of the ambiguities based on the correlation analysis of the solution of a large number of runs of an iterative phase retrieval algorithm with different random starting phases. The method is applied to experimentally measured diffraction patterns from an x ray waveguide illuminated by hard x rays. We demonstrate the possibility of retrieving the complex wave field at the exit face of the waveguide and compare the result with theoretical prediction.

Fennel waste-based films suitable for protecting cultivations

Biodegradable, flexible, and moisture-resistant films were obtained by recycling fennel waste and adding to fennel homogenates the bean protein phaseolin that was modified or not modified by the enzyme transglutaminase. All films were analyzed for their morphology, mechanical properties, water vapor permeability, and susceptibility to biodegradation under soil-like conditions. Our experiments showed that transglutaminase treatment of the phaseolin-containing fennel waste homogenates allowed us to obtain films comparable in their mechanical properties and water vapor permeability to the commercial films Ecoflex and Mater-Bi. Furthermore, biodegradability tests demonstrated that the presence of the enzyme in the film-casting sample significantly influences the integrity of such a product that lasts longer than films obtained either with fennel waste alone or with a mixture of fennel waste and phaseolin. These findings indicate the fennel-phaseolin film prepared in the presence of transglutaminase to be a promising candidate for a new environmentally friendly mulching bioplastic.

Adenylate cyclase/cAMP pathway downmodulation counteracts apoptosis induced by IFN-alpha in human epidermoid cancer cells

We have reported previously that interferon-alpha (IFN-alpha) induces apoptosis that is counteracted by an epidermal growth factor (EGF) --> Ras --> extracellular signal-regulated kinase (ERK)-dependent survival response in human epidermoid cancer KB cells. We have studied the effects of the cytokine on the cAMP-dependent pathway in these cells. A decrease in the intracellular cAMP levels was recorded in KB cells treated with IFN-alpha, whereas forskolin induced an increase in the production of cAMP that was reduced in the presence of IFN-alpha, suggesting a reduction in the activity of adenylate cyclase (AC) induced by IFN-alpha. These effects were paralleled by significant change in the expression of some AC catalytic subunit(s) and by reduction in the activity of protein kinase A (PKA). 8-Br-cAMP completely antagonized the reduction of PKA activity induced by IFN-alpha, whereas PKA inhibitor KT5720 enhanced the reduction of the enzyme activity induced by IFN-alpha. We have found that IFN-alpha induced a decrease in cAMP response element binding protein (CREB) phosphorylation without changes in its total expression. The concomitant treatment with IFN-alpha and 8-Br-cAMP potentiated and KT5720 counteracted apoptosis induced by IFN-alpha alone. In conclusion, these data suggest that the decrease in AC/cAMP pathway activity is a survival response to the apoptosis induced by IFN-alpha. Therefore, this pathway could represent a target to enhance the antitumor activity of IFN-alpha.

Structure and expression of a novel gene family showing male germline specific expression in Drosophila melanogaster

We report the characterization of two novel genes of Drosophila melanogaster, named mst36Fa and mst36Fb. They define a novel gene family, showing identical time and tissue-specificity limited to male germ cells where their transcription starts during meiotic prophase. These two genes encode for two slightly basic proteins highly homologous to each other and fairly rich in leucine and glutamic acid. Although strictly clustered, these genes utilize different promoter regions as revealed by examination of transgenic flies bearing mst36F-promoter-lacZ reporter constructs and by reverse transcription-polymerase chain reaction assays. Our data suggest that at least one gene (mst36Fa) of the cluster is under translational repression until spermiogenesis suggesting a putative role in the spermatides differentiation. The present study is aimed at the structural analysis of these genes.

Natural Polysaccharide-Based Gels for Dairy Food Preservation

The innovative packaging systems described in the present work, based on natural gels, have been shown to increase the shelf life of the Mozzarella cheese, without adding any chemical substance and without thermal procedures. Physical, physicochemical, microbiological, analytical, and mechanical analyses were used to monitor the quality of the cheese as a function of storage type and storage time. In particular, microbiological analysis confirmed that the characteristics of the Mozzarella cheese stored at 4 degrees C in gel are maintained for more than 15 d, whereas samples stored in the mother solution lost important characteristics after 5 d. A penetration test (texture) confirmed that the Mozzarella cheese preserved in the gel maintained mechanical properties similar to those of the fresh product, even after storage for 30 d at 4 degrees C.

Assembly of HCV E1 and E2 glycoproteins into coronavirus VLPs

Hepatitis C virus (HCV) is believed to assemble by budding into membranes of the early secretory pathway, consistent with the membrane location where the viral envelope glycoproteins E1 and E2 accumulate when expressed. Coronavirus assembly also takes place at pre-Golgi membranes. Here, we generated coronavirus-like particles carrying in their envelope chimeric HCV glycoproteins composed of the ectodomains of E1 and E2, each fused to the transmembrane plus endodomain of the mouse hepatitis coronavirus spike glycoprotein. The chimeric particle system will enable structural and functional studies of the HCV glycoproteins.

Recombinant human tissue transglutaminase produced into tobacco suspension cell cultures is active and recognizes autoantibodies in the serum of coeliac patients

Human tissue transglutaminase (htTG) is one of the most important member within the transglutaminase family, enzymes that for their capacity of catalyzing post-translational modifications of proteins and peptides, rise an high interest for industrial applications. More recently, for its implication as the major autoantigen in the coeliac disease, availability of human tissue transglutaminase as recombinant form is required for accurate diagnostic tests. The aim of this study was to find an alternative and inexpensive source to produce human tissue transglutaminase. To date, plant systems are proposed as heterologous hosts to produce recombinant proteins for use in disease diagnosis and therapy. Here, we describe the stable expression of human tissue transglutaminase into Nicotiana tabacum cultured cells (cultivar Bright Yellow 2 (BY-2)). The recombinant enzyme was successfully expressed in different plant cell compartments and both apoplast (apo) and chloroplast (chl) purified proteins were shown to be catalytically active and able to bind GTP, a property possessed by the natural counterpart. Importantly, plant produced human tissue transglutaminase recognized autoantibodies in the serum of coeliac patients, suggesting possible applications in the diagnosis of coeliac disease.