Process design and techno-economic analysis of activated carbon derived from anthracite coal

Activated carbon (AC), renowned for its versatile applications in water treatment, air purification, and industrial processes, is a critical component in environmental remediation and resource recovery strategies. This study encompasses the process modeling of AC production using anthracite coal as a precursor, involving multiple activation stages at different operating conditions, coupled with a detailed techno-economic analysis aimed at assessing the operational feasibility and financial viability of the plant. The economic analysis explores the investigation of economic feasibility by performing a detailed cashflow and sensitivity analysis to identify key parameters influencing the plant's economic performance, including raw material and energy prices, operational and process parameters. Capital and operational costs are meticulously evaluated, encompassing raw material acquisition, labor, energy consumption, and equipment investment. Financial metrics like Net Present Value (NPV), Internal Rate of Return (IRR), and payout period (POP) are employed, and the results show that AC selling price, raw material cost and plant capacity are the most influential parameters determining the plant's feasibility. The minimum AC production cost of 1.28 $/kg is obtained, corresponding to coal flow rate of 14,550 kg/h. These findings provide valuable insights for stakeholders, policymakers, and investors seeking to engage in activated carbon production from anthracite.

Design of a Parabolic Trough Collector Solar Field for a Pilot CO2 Capture Plant from Natural Gas Combined Cycle Power Plant Flue Gas

A parabolic trough collector solar field was designed to supply the heat needed to regenerate the CO2-rich monoethanolamine in a solar-assisted carbon capture system. Process design modeling was performed for 90% of the CO2 removal from 1% of the flue gas produced by a 255 MWe natural gas combined cycle power plant. Calculations with and without 24 h of thermal energy storage by increasing the solar collector size needed and providing a buffer vessel to store hot heat transfer fluid were performed. A dynamic analysis of the solar field using the hourly solar forecast was performed to investigate how heat transfer fluid mass flow changes during January and June to maintain the desired parabolic solar field outlet temperature needed for CO2 reboiler operation. The calculations provided here present an explicit method to calculate relevant solar field design parameters that can be scaled up and used in solar energy-assisted gas capture processes.

Obinutuzumab plus bendamustine for relapsed/refractory chronic lymphocytic leukemia and predictive and prognostic impact of genetic alterations: the phase II GABRIELL study

GABRIELL was a phase II single-arm study to evaluate the efficacy and safety of obinutuzumab plus bendamustine for relapsed/refractory (R/R) chronic lymphocytic leukemia (CLL). Seventy-two patients with active disease received treatment for up to six 28-day cycles. Overall response rate was 78.6% with a median progression-free survival (PFS) of 26 months, and overall survival (OS) not reached at the end of follow-up (36 months). Undetectable measurable residual disease (≤0.01%; 36.4% in bone marrow and 53.4% in peripheral blood) correlated with a significantly longer PFS and OS (vs. >0.01). Common grade ≥3 adverse events (76.4%) were neutropenia (58.3%), thrombocytopenia (26.4%) and febrile neutropenia (11.1%). TP53 disruption was the only independent predictive factor for response (Hazard ratio; HR: 0.228). Unmutated immunoglobulin heavy chain variable region (HR: 16.061) was a negative prognostic factor for PFS. In conclusion, the combination of obinutuzumab plus bendamustine is an active and generally adequately-tolerated treatment for R/R CLL.

AB1585-PARE DO PATIENT AND PHYSICIAN ASSESSMENTS OF A HEALTH CARE VISIT MATCH FOR HISPANIC/LATINX PATIENTS WITH RHEUMATOID ARTHRITIS IN THE UNITED STATES AND PUERTO RICO?

Background

Nonlinear associations in rheumatoid arthritis (RA) prevalence and sociodemographic indices suggest social determinants of health affect RA.1 RA screening tools have lower sensitivity and specificity for Hispanic/Latinx individuals compared with white individuals (77% vs 85% sensitivity and 45% vs 87% specificity).2 Hispanic/Latinx people also present to physicians later and with more severe RA.3 There is little research in this population to explain these differences or how they can be addressed. Because it is known the Hispanic/Latinx population has lower English-language proficiency, we hypothesized this is in part because of the lack of validated Spanish-language educational materials and research tools for RA.

Objectives

To validate a Spanish-language patient-provider questionnaire (PPQ) for Hispanic/Latinx patients with RA that had previously been validated as concordant for primary care visits in Sweden.4

To understand if rheumatologist and patient assessments for Hispanic/Latinx people with RA are concordant when using a Spanish-language digital PPQ.

To determine if a Spanish-language rheumatologist-completed PPQ could be a proxy for patient impressions in a prospective clinical study.

Methods

A Spanish-language PPQ for RA was created by translating 9 of 13 questions previously validated in the Swedish study,4 and adding a question about treating to target specific to RA. The survey was made available on tablet devices in 4 rheumatology clinics in the U.S. and Puerto Rico. Clinic staff obtained patient consent and gathered demographic information to generate a unique confidential identifier code for each visit, which was inputted into surveys on tablet devices. After the visit ended the patient and rheumatologist were each given the PPQ coded for that visit to complete independently of one another. The PPQs were submitted electronically to a secure database in which the visit code was the only identifier recorded.

Results

Across 114 clinical visits, 96.75% of possible answers were recorded and were almost invariably positive with scores of 5 (strongly agree; 88%), 4 (agree; 12%), or 3 (neither agree nor disagree; 0.09%). Physicians responded with 4 (agree) more often than patients (18% vs 6% of responses). Responses from both patient and physician were available for (96.64%) of answered questions. Within these paired answers, 80.67% were concordant (same answer from both patient and physician). Physicians answered 4 when patients answered 5 in 76.5% of discordant responses (different ratings from patient and physician). Most physician ratings of 4 came from 1 of the 4 physicians involved and only 12.5% of patients were responsible for 75% of the patient responses of 4.

Conclusion

Hispanic/Latinx patients with RA and their rheumatologist rated their communication, goal setting, and relationships extremely positively, making it difficult to evaluate true concordance and not possible to use rheumatologist-completed PPQs as proxy for patient assessments. Notably, ratings were substantially different from what is typically seen on Likert scales, which normally skew positively but with a normal distribution. This finding may reflect social determinants of health or cultural differences such as a social-desirability bias toward positive statements about physician-patient interactions. Heterogeneity within the participants is also a plausible explanation, considering that a distinct subset of respondents account for almost all responses below the 5 rating. Further research is needed to identify best practices for measuring treatment to target and patient-rheumatologist interactions in the Hispanic/Latinx population with RA.

References

[1]Safiri S, et al. Ann Rheum Dis. 2019;78(11):1463-71. doi:10.1136/annrheumdis-2019-215920

[2]Potter J, et al. J Rheumatol. 2008;35(8):1545-9. PMID: 18597406

[3]Riad M, et al. J Clin Rheumatol. 2019. doi:10.1097/RHU.0000000000001085

[4]Ahlén GC, et al. Fam Pract. 2007;24(5):498503. doi.org/10.1093/fampra/cmm043

Acknowledgements

We wish to acknowledge the important contributions of our HOPE CAPE RA participants, including the patients and providers and Anne Sydor, PhD for her invaluable advice and help throughout the project.

This project was funded by the Bristol Myers Squibb Foundation.

Disclosure of Interests

Daniel Hernandez Grant/research support from: This project is supported by the Bristol Myers Squibb Foundation, Julio Bravo Grant/research support from: This project is supported by the Bristol Myers Squibb Foundation, Juan Jose Maya Grant/research support from: This project is supported by the Bristol Myers Squibb Foundation, Oscar Soto-Raíces Grant/research support from: This project is supported by the Bristol Myers Squibb Foundation, Angel Tapia Grant/research support from: This project is supported by the Bristol Myers Squibb Foundation, Guillermo Valenzuela Grant/research support from: This project is supported by the Bristol Myers Squibb Foundation, W. Benjamin Nowell Grant/research support from: This research was supported by the Bristol Myers Squibb Foundation, Shilpa Venkatachalam Grant/research support from: This project is supported by the Bristol Myers Squibb Foundation

Benefits of two twelve-week multimodal programs on reaction time in community dwellings at risk of falling: preliminary results

Background

A slower reaction time (RT) performance is considered a risk factor for falls. Different approaches as a psychomotor intervention (involving neuromotor exercises) or the whole-body vibration (inducing neurophysiological changes) may reduce the risk of falls. Nevertheless, a combined program may promote greater gains. This study aimed to investigate the acceptability and the effect of two multimodal programs on RT in community-dwelling older adults fallers or balance-impaired.

Methods

A total of 37 participants (74.3 ± 5.2 years) were divided into two groups (3x/week): experimental group 1 (psychomotor intervention); experimental group 2 [EG2] (combined program: psychomotor intervention + whole-body vibration). The Deary-Liewald reaction time task assessed RT. Simple and choice reaction time [CRT] (ms) tasks were recorded under single and dual-task (DT) paradigms. DT cost was also computed.

Results

The attendance rate was 86.3%. Wilcoxon test comparisons revealed significant differences between baseline and post-intervention evaluations in the EG2. The improvement was observed in the variable ‘CRT-DT’, in which participants spent less time to perform the task (1026.0 ± 153.4 vs. 960.4 ± 160.9, P = 0.040). The correspondent effect size was medium (r = 0.33). The DT cost was also decreased in CRT-DT by 3.9%. No significant differences between groups were found.

Conclusions

This study demonstrated that both programs were safe and highly attended. The results suggest that a combined intervention (psychomotor intervention + whole-body vibration) should be privileged to improve RT and reduce the risk of falls. Trial Registration: ClinicalTrials.gov Identifier: NCT03446352. Funding: This study was supported by the ESACA Project (Grant ALT20-03-0145-FEDER-000007) and by FCT (SFRH/BD/147398/2019).

Novel approaches to reduce the risk of falling in community dwellings: effects of two multimodal programs in lower-body strength—a pilot study

Background

Muscle weakness is a key risk factor for falls and strength exercises should be included in fall prevention programs. A psychomotor intervention promoting motor stimulation and the whole-body vibration (WBV) providing muscle contractions may reduce the incidence of falls. Our hypothesis relies on the greater benefits of a combined program. This study aimed to evaluate the effectiveness and the feasibility of two 12-week multimodal programs in lower-body strength in community dwellings fallers or with balance impairment.

Methods

Thirty-seven participants (34 women; mean age 74.3 ± 5.2 years) were allocated into: experimental group 1 [EG1] (psychomotor intervention), or experimental group 2 [EG2] (combined program: psychomotor intervention plus WBV), 3x/week. Maximal strength of knee extensors and flexors was assessed by an isokinetic dynamometer at 60°/s. Wilcoxon and Mann-Whitney tests were performed.

Results

The overall adherence rate was high (86.3%), with a level intensity in the rating of perceived exertion of 12.1 ± 0.3 points, in EG1, and 12.5 ± 0.4 points, in EG2. Significant changes between the pre-post intervention were observed exclusively in EG2, in the variables ‘Peak torque extension’ (71.7 ± 28.6 Nm vs. 79.2 ± 23.5 Nm, P = 0.042) and ‘Agonist/Antagonist ratio’ (60.2 ± 13.0 vs. 53.5 ± 8.6, P = 0.013). The effect size (r) in both variables was medium. No significant changes between groups were detected.

Conclusions

This pilot results indicate that both programs were feasible and well-tolerated. The combined program demonstrates larger effectiveness, since the WBV may positively influence the lower-body strength, reducing the risk of falls. Trial Registration: ClinicalTrials.gov Identifier: NCT03446352. Funding: This pilot was granted by the ESACA Project (Grant ALT20-03-0145-FEDER-000007) and by FCT (SFRH/BD/147398/2019).

Twelve-week multimodal programs can improve dual-task performance in risk factors for falls in community-dwelling older adults: a pilot study

Introduction Performing a dual-task (DT), mainly while walking and performing another task simultaneously, is seen as determinants factors for falls and injuries in older adults. A psychomotor intervention relying on the prevention of sensorimotor and neurocognitive deterioration may prevent falls. The whole-body vibration (WBV) promotes the increase of agility, reducing the risk of falling. However, an intervention that combines both methods can lead to additional benefits, particularly as regards DT.

Objectives To evaluate the feasibility and the effect of two multimodal programs designed for community-dwelling older adults, fallers or at high risk of falling, on DT performance ability.

Methodology Thirty-seven participants (74.3±5.2 years) were randomly assigned into experimental group 1 [EG1] (psychomotor intervention); or experimental group 2 [EG2] (psychomotor intervention + WBV). DT performance (TUGcog) was assessed by the Timed Up and Go Test (s) performed simultaneously with the counting backward cognitive task.

Results Adherence rate was 86.3%. Wilcoxon test comparisons showed improvements from baseline to post-intervention on EG1 (time (s): 10.1±2.7 vs. 9.0±2.7, p = 0.001; cognitive stops (n): 0.9±1.0 vs. 0.2±0.4, p = 0.012; motor stops (n): 0.3±0.5 vs. 0.0±0.0, p = 0.025), corresponding to an effect size (cohen’s d) ranging from 0.41 (small) to 0.92 (medium) and on EG2 (time (s): 9.9±2.5 vs. 8.5±1.8, p = 0.010; cognitive stops (n): 1.1±0.7 vs. 0.4±0.5, p = 0.004), corresponding to a d ranging from 0.64 (medium) to 1.15 (medium). There were no significant differences between groups.

Conclusion These preliminary results suggested that the multimodal programs were feasible and effective in reducing the risk of falling by improving the determinant risk factor DT performance. Trial Registration: ClinicalTrials.gov Identifier: NCT03446352. Funding: This study was funded by ESACA Project (Grant ALT20-03-0145-FEDER-000007) and by FCT (SFRH/BD/147398/2019).

172 Effect of period of insertion of a progesterone-releasing device and pro-oestrus length on follicular and luteal characteristics and pregnancy rates to fixed-time AI in Bos indicus heifers

An experiment was designed to evaluate the effect of the length of insertion of a progesterone (P4)-releasing device and the length of pro-oestrus on follicular and luteal characteristics and pregnancy rates to AI (P/AI) in Bos indicus heifers treated with oestradiol/P4-based treatments. Bos indicus beef heifers (n=374), 22-26 months of age, with a corpus luteum (CL) or at least one follicle ≥8mm in diameter and with a body condition score between 2.5 and 3.5 (1-to-5 scale) were synchronised using three treatments for fixed-time AI (FTAI). On Day 0, all heifers received 2mg of oestradiol benzoate (Sincrodiol, Ourofino) and an intravaginal device with 1g of P4 (Sincrogest, Ourofino). The P4 device was removed on Day 6 in heifers in the J-Synch 6 group (n=120) and on Day 7 in heifers in the J-Synch 7 group (n=105) and conventional group (n=165). All heifers received 500μg of cloprostenol (Sincrocio, Ourofino) and 300IU of equine chorionic gonadotrophin (SincroeCG 6000UI, Ourofino) at the time of P4 device removal. Furthermore, heifers in the conventional treatment group received 0.5mg of oestradiol cypionate (SincroCP, Ourofino) at the same time. In addition, all heifers were tail-painted for oestrus detection (CeloTest, Biotay). Heifers that had lost ≥50% of the tail paint by 70-74h (J-Synch groups) or 48-52h (conventional group) after device removal were FTAI at that time. Heifers not showing oestrus by 70-74h (J-Synch groups) or 48-52h (conventional group) received 10μg of gonadotrophin-releasing hormone (Sincroforte, Ourofino) at the same time and were FTAI 8h later. All heifers were also examined using ultrasonography (Mindray DP50 Vet) every 12h from the time of device removal to determine the time of ovulation, 6 days after ovulation to determine the diameter of the CL, and 28 days after FTAI for P/AI determination. Data were analysed using the MLGM procedure (InfoStat) for normal data families (follicular dynamics) and binary data family (P/AI). The results are shown in Table 1. The diameter of the dominant preovulatory follicle and the CL did not differ among groups (P>0.12). However, the interval from device removal to ovulation was longer in heifers in the J-Synch groups than in heifers in the conventional group (P<0.05). Furthermore, P/AI was not different among groups. In conclusion, although the J-Synch protocols delayed the interval from P4 device removal to ovulation, the three protocols evaluated in the present study were equally effective in Bos indicus heifers. Table 1.Mean (±s.e.m.) diameter of the preovulatory follicle (P/Foll) and corpus luteum (CL), interval from progesterone (P4) device removal to ovulation, and pregnancy rates to AI (P/AI) in Bos indicus heifers Treatment P/Foll, mm Interval to ovulation, h CL diameter, mm P/AI,% (n) J-Synch 6 10.5±0.7 101.4±2.3a 18.6±1.0 52.0 (62/120) J-Synch 7 10.6±0.7 96.0±2.2a 16.5±0.9 39.0 (41/105) Conventional 9.4±0.7 73.0±1.9b 16.8±0.9 45.0 (74/165) a,bDifferent superscripts denote differences between groups in the interval from P4 device removal to ovulation.

Antifungal activity of the essential oil obtained from Cryptocarya alba against infection in honey bees by Nosema ceranae

The honeybee disease nosemosis type C is a serious problem since its causative agent, microsporidium Nosema ceranae, is widespread among adult honey bees. Some of the feasible alternative treatments that are used to control this disease are plant extracts. The aim of the present work was to evaluate the effects of essential oils of Chilean plant species, such as Cryptocarya alba, which is used against N. ceranae, and to identify and quantify the majority active compounds in the EO as well as their potential use for the control of nosemosis. Essential oils were obtained using the stripping steam technique with Clevenger equipment and were subsequently analyzed by Gas chromatography-mass spectrometry. Mortality was recorded daily over at least 8days as worker honeybees were exposed to a range of doses of EO dispersed in a sucrose solution. C. alba oil appears to be nontoxic to A. mellifera adults at the tested concentration (the same concentration inhibits the growth of N. ceranae), showing that this oil can be used for the treatment of nosemosis. EO effectiveness was demonstrated against N. ceranae by calculating the percentage of decrease in infected bees from untreated infected groups vs infected groups treated with EO or the reference drug fumagillin. It was determined that a dose of 4µg EO/bee was most effective in controlling N. ceranae development. We determined innocuous doses of C. alba essential oil for honeybees. We demonstrated the antifungal activity of C. alba EO at 4μg/bee against N. ceranae and compared it to its major monoterpenes, such as β-phellandrene (20μg/bee), eucalyptol (20μg/bee) and α-terpineol (20μg/bee). The major compounds of C. alba EO, α-terpineol, eucalyptol and β-phellandrene, had significant effects against Apis mellifera infection by N. ceranae, but the antifungal effect of the complete essential oil on N. ceranae was larger than the effect of α-terpineol, eucalyptol or β- phellandrene separately, showing that C. alba oil may be a candidate for the treatment or prevention of nosemosis.

Differential innate immune response of European seabass (Dicentrarchus labrax) against Streptococcus iniae

Streptococcus iniae is a Gram-positive bacteria that causes invasive infections with severe septicemia and meningitis, producing high economic losses in marine and continental aquaculture. Head kidney leukocytes of European sea bass (Dicentrarchus labrax) were used to measure the differential innate immune response upon infection with S. iniae. The complete inhibition in the production of intracellular superoxide radicals and total peroxidase content was observed in infected cells. This study also elucidates changes in the relative expression of some immune-related genes. Interleukin 1β, tumor necrosis factor-α and interleukin-6 reached a peak of expression at 4-8 h post-infection, subsequently decreasing significantly up to 48 h post-infection. However, interleukin-10 and Mx protein increased over time, reaching the pick of expression at 48 h post-infection, whereas caspase-3 showed down regulation until 48 h post-infection. The in vivo study of immune related genes show the same kinetics of mRNAs expression as in vitro experience. The proinflammatory cytokines mRNA transcription levels peaked at an earlier time in vivo than in vitro system. Our findings indicate that there is a direct relationship between the dissemination of bacteria and the resulting infection-associated inhibition of respiratory burst, apoptosis, and the pro- and anti-inflammatory gene expression profiles.

Immunization of sea bream (Sparus aurata) juveniles against Photobacterium damselae subsp. piscicida by short bath: Effect on some pro-inflammatory molecules and the Mx gene expression

Cytokines are a family of proteins derived from macrophages, lymphocytes, granulocytes, mast cells and epithelial cells and can be divided into interferons (IFNs), Interleukins (ILs) and Tumor Necrosis factors (TNFs) among others. The presence of cytokines in a wide number of fish species has been proved and several molecules types have been already cloned and sequenced. In this work some proinflamatory molecules and Mx gene were detected in the liver of vaccinated sea bream juveniles with an average body weight of 5 g. The method of immunization was by short bath and three different bacterins against the marine pathogen Photobacterium damselae subsp. piscicida were designed and used to immunize fish. Five genes encoding for five different molecules were analyzed by real time PCR: IL-1β, IL Ir-2, Cox-2, Mx and TNFα. Gene expression was quantified along four days after fish immunization and results were compared among groups. Results show that the heat-inactivated vaccine stimulates the up-regulation of IL-1β, IL Ir-2, Cox-2 and TNFα genes whereas the UV-light inactivated vaccine was the unique vaccine which stimulates the expression of Mx gene. The present is a novel study that shows by the first time the effect of the inactivation process of vaccines on the expression levels of genes involved in the defense against Photobacterium damselae subsp piscicida.

Electronic effects of substituents on the stability of the iridanaphthalene compound [Ir[upper bond 1 start]Cp*{=C(OMe)CH=C(o-C6[upper bond 1 end]H4)(Ph)}(PMe3)]PF6

Iridanaphthalene complexes are synthesized from the corresponding methoxy(alkenyl)carbeneiridium compounds. The electronic character of the substituents on the 6-position of the metallanaphthalene ring is crucial from the point of view of the stability of the iridanaphthalene, [Ir[upper bond 1 start]Cp*{=C(OMe)CH=C(o-C[upper bond 1 end]6H4)(Ph)}(PMe3)]PF6, vs. its transformation to the corresponding indanone derivatives. Stability studies of the iridanaphthalene compounds revealed that strong electron donor substituents (-OMe) stabilize the iridanaphthalene, while weak electron donor (-Me) and electron withdrawing (-NO2) groups favor the formation of indanone derivatives. Two possible indanone isomers can be obtained in the conversion of the unstable iridanaphthalene complexes and a mechanism for the formation of these isomers is proposed.

Periodic nanostructures on unpolished substrates and their integration in solar cells

We present a novel fabrication process based on laser interference lithography, lift-off and reactive ion etching, which allows us to fabricate periodic nanostructures on photovoltaic substrates with an average root mean square (RMS) roughness of 750 nm. We fabricate nanostructures on unpolished crystalline silicon substrates, which reduces their reflectance 30% as fabricated. When an additional passivation layer is deposited, the light trapping grows, achieving a reflectance reduction of 60%. In addition, we have successfully integrated the nanostructured substrates in silicon wafer-based solar cells following standard processes, achieving a final efficiency of 15.56%.

Detection of volatile organic compounds using flexible gas sensing devices based on tungsten oxide nanostructures functionalized with Au and Pt nanoparticles

Flexible gas sensor devices are fabricated and optimized by integrating directly, via a single-step vapor-phase deposition method, highly crystalline tungsten oxide nanostructures functionalized with either gold or platinum nanoparticles. Gas tests of these devices show significant improvements with respect to flexible gas sensors based on non-functionalized structures, including greater responses to various volatile organic compounds (ethanol, acetone, methanol and toluene) and better selectivity towards ethanol and methanol, as demonstrate results for the sensors based on platinum-functionalized structures. The method presented here, which includes the fabrication of the whole flexible gas sensing device and the integration of functional nanostructures without the use of transfer methods, provides a simpler, faster and inexpensive method for the fabrication of highly functional flexible microsystems for gas sensing.

The in vitro immunomodulatory effect of extracellular products (ECPs) of Vagococcus fluvialis L21 on European sea bass (Dicentrarchus labrax) leucocytes

The immune associated genes, interleukin-1β (IL-1β), interleukin-6 (IL-6), interleukin 10 (IL-10), tumor necrosis factor-α (TNF-α), ciclo-oxigenase-2 (COX-2), and Mx gene were studied by real-time PCR in head-kidney leucocytes of sea bass after incubation with the extracellular products (ECPs) of the probiotic strain Vagococcus fluvialis L21 and polyinosinic:polycytidylic acid (POLY I:C), at different times (T1.5, T6, T12, T24, T48 and T72). In general, we can observe how pro-inflammatory cytokines IL-1β, TNF-α, IL-6 and COX-2 studied displayed a strong peak after stimulation with 1.5 h of ECPs of V. fluvialis L21, significant differences (P < 0.05) exist with other periods and with the POLY I: C at the same time. Similarly to the case of IL-10 also produced a statistically significant (P < 0.05) peak of expression on leukocytes that were stimulated with the ECPs of V. fluvialis L21. In the case of Mx gene expression, we note that in almost all sampling times there is an up-regulation of the Mx gene in leucocytes incubated with ECPs and POLY I:C compared to the control and Mx expression was higher in leucocytes that were stimulated with the ECPs of V. fluvialis for all times, except in T24. With these results we can consider that the ECPs of V. fluvialis L21 have a great power of stimulating the in vitro expression of immune-related genes and may even be useful as adjuvants for vaccine in aquaculture.

Biology-oriented development of novel lipophilic antioxidants with neuroprotective activity

Discovery of hydroxycinnamic acid derivatives with enhanced in lipophilicity, blood brain barrier permeability and neuroprotective potential.

The Crystal Structure of TlBrI2(4-methylpyridine-N-oxide)2

The unit cell of TlBrI2 (4-methylpyridine-N-oxide) 2 is orthorhombic, space group Pnna. with a = 1126.9(3),b = 919.8(2),c = 1210.4(3) pm.and Z = 4. The structure consists of discrete TlBrI2 (4-methyl-pyridine-N-oxide)2 molecules which have a distorted trigonal-bipyramidal geometry. The thallium atom is coordinated to two iodine atoms and a bromine atom in equatorial positions, and by two 4-methyl-pyridine-N-oxide ligands in the axial positions.

Effect of lipopolysaccharides from Vibrio alginolyticus on the Mx gene expression and virus recovery from gilthead sea bream (Sparus aurata L.) experimentally infected with Nodavirus

Infections with nodavirus affect a wild and farmed fish species throughout the world, mostly from the marine environment. The aim of this work was to determine the immune status of gilthead sea bream that comes as a result of a Nodavirus infection, induced by activation of the interferon response pathway by lipopolysaccharides from Vibrio alginolyticus and the expression of interferoninduced Mx protein in liver samples. The enhancement of Mx protein gene expression was detected in liver samples of experimentally nodavirus infected fish and, furthermore, the immunostimulant LPS of V. alginolyticus decreased almost three times the virus titration with respect to no-immunized or infected with nodavirus group of fish.

The in vitro effect of probiotic Vagococcus fluvialis on the innate immune parameters of Sparus aurata and Dicentrarchus labrax

In this study we evaluated the effect of the probiotic Vagococcus fluvialis on the cellular immune unspecific system of two different fish species of great interest in aquaculture such as gilthead sea bream (Sparus aurata) and European sea bass (Dicentrarchus labrax). Leucocytes from head kidney of the two fish species were extracted and concentration adjusted to 10(7) cells ml(-1). Phagocytic and respiratory burst activity and the peroxidase content of leucocytes were observed 30 min after incubation with the probiotic Vagococcus fluvialis alive or inactivated with heat shock or UV-light at different concentrations of 10(7), 10(8), 10(9) cfu ml(-1) (final concentration 10(6), 10(7), 10(8) cfu ml(-1)). V. fluvialis produced dose-dependent increments in respiratory burst in sea bream leucocytes. The respiratory burst activity of sea bream head kidney leucocytes incubated with 10(6) cfu ml(-1) of live and inactivated bacteria was not stimulated. The highest values of peroxidase content were observed in sea bass cells with stimulation indexes higher than 1 in HK leucocytes incubated with 10(8) cfu ml(-1) of live and inactivated bacteria. Statistical analysis revealed that differences being only significant in sea bass leucocytes where 10(8) cfu ml(-1) bacteria denote statistically significant differences (P < 0.05) respect to other concentrations. Highest values of phagocytic activity were obtained in sea bass macrophages incubated with UV-light inactivated bacteria (27.33% ± 1.45), where significantly differences with sea bass HK leucocytes were detected. Our results suggest that the in vitro assays are a useful tool to optimize the effective dose of probiotic bacteria. Although in vivo studies are necessary to confirm the immunomodulatory effect of this strain.

Development and validation of a specific questionnaire for evaluating the impact of gastrointestinal symptoms on the health-related quality of life of transplant patients

BACKGROUND

Transplant patients receiving immunosuppressant treatment suffer gastrointestinal symptoms (GIS) limiting their health-related quality of life (HRQOL) and causing dose redíuctions and discontinuations.

METHODS

This observational, multicenter, cross-sectional study aims to develop and validate a questionnaire for detecting and quantifying the impact of GIS on the HRQOL of patients with functioning organ transplants. We developed a pilot version of the questionnaire SIGIT-QOL (Impact of Gastrointestinal Symptoms on Quality Of Life) and then evaluated the feasibility, validity, and reliability. We consecutively recruited 274 solid organ transplant patients from 20 hospitals. Sociodemographic and clinical data were collected. Patients completed the SIGIT-QOL and Gastrointestinal Quality of Life Index-GIQLI- questionnaires.

RESULTS

Mean age was 52.7 (SD, 7.59) and 181 were male; 43.4% showed an episode of GIS since transplantation (3-12 months before). Of all patients, 95.3% completed the SIGIT-QOL. Mean time of completion was 6.49 minutes. Exploratory factorial analysis identified a 1-dimensional structure (42% of total variance). Internal consistency was high (Cronbach's alpha, 0.889). A significant association was found between the SGITI-QOL and the presence of GIS (P < .01). Finally, correlation coefficients between SIGIT-QOL and GIQLI were moderate-high except for Social Function.

CONCLUSION

The brief SIGIT-QOL questionnaire can detect and quantify the GIS and their impact on the HRQOL of solid organ transplant patients.

Efficacy of low doses of pamidronate in osteopenic patients administered in the early post-renal transplant

This study evaluates the efficacy of low doses of pamidronate after renal transplantation to prevent bone loss in osteopenic patients. Results show that pamidronate is safe and significantly reduced spinal bone loss when administered immediately after renal transplantation.

INTRODUCTION

The purpose of this work is to evaluate the efficacy of two intravenous infusions of pamidronate in the immediate post-transplant period in a renal transplant (RT) population.

METHODS

In this 12-month, randomized, double-blind, multicenter trial, 39 kidney recipients with diagnosed osteopenia received two doses of 30 mg of disodium pamidronate (n = 24) or placebo (n = 15), at surgery and 3 months post-RT. All patients received calcium and vitamin D. Bone density of the lumbar spine and total femur was measured by dual-energy X-ray absorptiometry (DXA) and X-rays were performed at RT, 6 and 12 months post-RT. Biochemical and hormonal determinations were performed before and after treatment.

RESULTS

Pamidronate significantly reduced spinal bone loss, but no significant benefit was found for the incidence of fractures. Elevated baseline intact parathyroid hormone (iPTH) and bone remodeling markers returned to normal levels 3 months post-RT. However, normal procollagen type I N propeptide (PINP) concentrations were only maintained in the pamidronate group. After RT, a comparable graft function was observed in both groups according to creatinine values, 25-hydroxyvitamin-D (25-OH-D) levels were improved, and serum calcium levels normalized after a transient fall during the first 3 months.

CONCLUSION

A low dose of pamidronate prevents bone loss in osteopenic patients when administered immediately after RT.

First report of Streptococcus iniae in red porgy (Pagrus pagrus, L.)

This work describes the first isolation of Streptococcus iniae in red porgy, Pagrus pagrus (L.), and the first European isolation of this pathogen in gilthead seabream, Sparus aurata (L.). In both farmed fish species, infection resulted in lethargy, anorexia, abnormal swimming, exophthalmia and sudden death, with mortality rates of over 25% in red porgy and 10% in gilthead seabream. Beta-haemolytic Gram-positive cocci, catalase negative and oxidase negative, were isolated in pure culture from internal organs. Conventional and rapid identification systems, and 16S rRNA gene partial sequencing were used to identify the causative agent of the natural disease. LD50 trials were carried out to show the virulence of this isolated strain in these species, with values of 1.7 × 104 CFU per fish in red porgy and 1.32 × 105 CFU per fish in gilthead seabream. The most prominent lesions were meningoencephalitis and multifocal infiltration of macrophage cells in the kidney and spleen.

Invasion and survival of Photobacterium damselae subsp. piscicida in non-phagocytic cells of gilthead sea bream, Sparus aurata L

Fluorescence microscopy and gentamicin protection assays were used to investigate the ability of four Photobacterium damselae subsp. pisicida (Phdp) strains to adhere to and to invade the fish epithelial cell line, SAF-1, derived from Sparus aurata. All strains tested were detected intracellularly using both techniques, although internalization levels varied among strains. Treatment with cytochalasin D and experiments carried out at 4 degrees C demonstrated that a functional host cell cytoskeleton and active cell metabolism are necessary for bacterial internalization. Intracellular bacteria were detected for up to 7 days with a round morphology and were stained with DAPI, indicating that some bacterial cells may remain viable inside SAF-1 cells. Our in vitro findings indicate that Phdp are capable of adhering, entering and surviving within the non-phagocytic epithelial cell line SAF-1, which may be important for persistence and establishment of a carrier state in S. aurata.

Invasion and intracellular survival of Hafnia alvei strains in human epithelial cells

AIMS

The aim of this study was to investigate the invasion and intracellular survival of different Hafnia alvei strains in HeLa cells.

METHODS AND RESULTS

We performed different experiments on the bacterial invasion of different strains of H. alvei into the HeLa cell line using gentamicin protection assays and immunofluorescence. We also report the time course of cell internalization and the effects of inhibitors on the invasion of H. alvei. Levels of invasion varied depending on the conditions (strain, time and inoculum size) used.

CONCLUSIONS

This study revealed that H. alvei strains were able to enter and persist in a human epithelial cell line.

SIGNIFICANCE AND IMPACT OF THE STUDY

Our in vitro findings highlight the possibility that some H. alvei strains may exploit nonprofessional phagocytes or nonphagocytic cells to spread in vivo, which may be important for the persistence and establishment of an asymptomatic carrier state.