VerSoX B07-B: a high-throughput XPS and ambient pressure NEXAFS beamline at Diamond Light Source.

The beamline optics and endstations at branch B of the Versatile Soft X-ray (VerSoX) beamline B07 at Diamond Light Source are described. B07-B provides medium-flux X-rays in the range 45-2200 eV from a bending magnet source, giving access to local electronic structure for atoms of all elements from Li to Y. It has an endstation for high-throughput X-ray photoelectron spectroscopy (XPS) and near-edge X-ray absorption fine-structure (NEXAFS) measurements under ultrahigh-vacuum (UHV) conditions. B07-B has a second endstation dedicated to NEXAFS at pressures from UHV to ambient pressure (1 atm). The combination of these endstations permits studies of a wide range of interfaces and materials. The beamline and endstation designs are discussed in detail, as well as their performance and the commissioning process.

Dual plating in the metastatic distal humerus: Benefits may outweigh the risks.

Background: Impending and complete pathologic fractures of the distal humerus are rare complications of metastatic cancer. Surgical treatment aims to quickly restore function and minimize pain. Plate and screw fixation (PSF) is a common method for addressing these lesions, but unlike in orthopaedic trauma, there are no clear guidelines for best management. While dual PSF theoretically provides better support and reduces the chance of reoperation due to tumor progression, single PSF is currently the more common choice. Materials and methods: Between March 2008 and September 2021, 35 consecutive patients who underwent PSF for distal humerus metastasis or multiple myeloma were retrospectively reviewed. The proportion of patients who developed various postoperative complications, including infection, nonunion, deep vein thrombosis, tumor progression, and radial nerve palsy, as well as those requiring reoperation, was calculated. Mann-Whitney U test, Pearson's chi-squared, and Fisher's exact test were used to investigate differences between the single and dual PSF groups with statistical significance defined as p ≤ 0.05. Results: There was no significant difference (p = 0.259) in revision rate, although 3 of 21 (14.3 %) single PSF patients required reoperation compared to 0 of 14 (0.0 %) dual PSF patients. The revisions were performed in one patient due to refracture and in two patients due to tumor progression. Although not statistically significant, a larger percentage of single PSF patients developed a postoperative complication compared to dual PSF patients [odds ratio 0.42 (95 % confidence interval 0.071 to 2.5); p = 0.431]. Single PSF did lead to shorter operative time compared to dual PSF [p < 0.001]. Conclusion: Dual PSF is non-inferior to single PSF and potentially results in fewer reoperations and postoperative complications in distal humerus pathologic lesions, although it leads to longer operative time. The current study is limited by small sample size due to the rarity of distal humerus metastatic lesions.

Exploring lived experiences of gunshot wound survivors: A key to ethnographically informed public health interventions for curbing firearm violence.

INTRO: The high rates of gun violence in the United States are a recognized public health concern with increased attention since the 1990's. The predominant studies used in gun violence research have been epidemiological approaches and quantitative analyses. This study, instead, examines lived experiences of gunshot wound survivors to better understand their situations. This study also compared the different census categories and their types of gunshot wound injuries. Ethnographic informed analyses may inform public health interventions to decrease firearm injuries. METHODS: Data was collected through a series of semi-structured interviews at the emergency department of an urban, Level-1, academic trauma center. 96 patients with gunshot wounds (GSWs) from 2018-2022 were included in the study. Thematic analysis was conducted after coding interview responses. RESULTS: There was a significant difference found between the 2 census categories (White and Minority populations). Those who self-identified as white had more self-inflicted GSWs (6) than other groups. Those who self-identified in the minority population had more GSWs as a result of an altercation (36) or as an innocent bystander (20). Interview data also demonstrated a trend in changing opinions about firearms in a group of participants with remote previous gunshot wounds (pGSW). When compared to the acute gunshot wound group (aGSW) the previous gunshot wound group (pGSW) responses showed support for increased gun safety and policies that limit firearm access. CONCLUSION: Different injury patterns between census groups demonstrates that multiple public health approaches will be needed to decrease firearm violence. Ethnographically informed approaches, including the support of people with previous GSW injuries, may help craft those interventions to reduce injury. Matched peer support programs represent one potential intervention to decrease secondary injury and firearm violence.

International Union of Basic and Clinical Pharmacology CXIII: Nuclear Receptor Superfamily-Update 2023.

The NR superfamily comprises 48 transcription factors in humans that control a plethora of gene network programs involved in a wide range of physiologic processes. This review will summarize and discuss recent progress in NR biology and drug development derived from integrating various approaches, including biophysical techniques, structural studies, and translational investigation. We also highlight how defective NR signaling results in various diseases and disorders and how NRs can be targeted for therapeutic intervention via modulation via binding to synthetic lipophilic ligands. Furthermore, we also review recent studies that improved our understanding of NR structure and signaling. SIGNIFICANCE STATEMENT: Nuclear receptors (NRs) are ligand-regulated transcription factors that are critical regulators of myriad physiological processes. NRs serve as receptors for an array of drugs, and in this review, we provide an update on recent research into the roles of these drug targets.

'Lifts your spirits, lifts your mind': A co-produced mixed-methods exploration of the benefits of green and blue spaces for mental wellbeing.

INTRODUCTION: Mental health problems are a considerable public health issue and spending time in nature has been promoted as a way to access a range of psychological benefits leading to the development of nature-based interventions for people with severe and enduring mental health problems. Less, however, is understood about the potential benefits and efficacy of day-to-day routine access to outdoor green and blue spaces for mental health service users. METHODS: Using a mixed-methods design between April and October 2021, we explored the benefits and barriers to spending time outdoors with a purposive sample of mental health service users (N = 11) using qualitative interviews and an online general population survey (N = 1791). Qualitative evidence highlighted the restorative benefits of nature and identified a number of barriers associated with fears around personal safety, social anxiety, fatigue and lack of motivation. COVID-19 had also restricted access to green and blue spaces. Having social contact and support encouraged people to spend time outdoors. In the quantitative survey, self-report and standardised measures (the Patient Health Questionnaire and the Warwick-Edinburgh Wellbeing Scale) were used to assess past and current mental wellbeing. FINDINGS: Statistically significant differences were found between wellbeing and the use of green and blue spaces. Those with mental health problems spent time outdoors because they: felt guilty; wanted to reduce their anxiety; or rely on someone for encouragement. Those without mental health problems endorsed more positively framed reasons including relaxation, improving physical health or getting exercise. Barriers for people with mental health problems involved safety concerns, feeling anxious and having a poor self-image. These findings give insight into motivations for an outdoor activity to help inform the design of public mental health interventions. CONCLUSION: Further work is required to improve access and safety to promote the benefits of green and blue spaces for everyone. PATIENT OR PUBLIC CONTRIBUTION: The research team included expert experienced researchers with a mental health service provider (Praxis Care) and they were involved in the development of the research idea, funding application, design, data collection, analysis, writing up and dissemination activities.

Peer researchers' experiences of a co-produced research project on supported decision-making.

BACKGROUND: Making decisions about your own life is a key aspect of independence, freedom, human rights and social justice. There are disabled people who, without support, would be assessed as incapable of making certain decisions but with the appropriate support are capable of making those decisions and so to not provide that support infringes their rights, undermines their autonomy and reinforces their exclusion from society. However, there is limited research evidence available about disabled people's experiences of the range of approaches provided to support decision-making. This article will explore the experiences of four peer researchers who co-produced a research project on how people have, or have not been, supported to make their own decisions. Two of the peer researchers have experience of mental health problems and two are people with an intellectual disability. The article refers to peer research because its subject matter is the relevant lived experience of people. Peer research is therefore an approach within the broader areas of participatory research and co-production. METHODS: The peer researchers interviewed 21 people with mental health problems and 20 people with an intellectual disability to gain an in-depth understanding of their experiences and preferences for how decision-making should be supported. Peer researcher experiences at each stage of the study from design to analysis were explored using data collected from the peer researchers via blogs written at early stages of the study, discussions at team meetings as the fieldwork progressed and at a final workshop at the end of the study which gave the peer researchers the opportunity to focus on their overall reflections of being a peer researcher. The article also discusses motivations to undertake the peer research role, the process of co-production and the challenges negotiated during the study. RESULTS: The peer researchers reported a number of positive effects of being involved in the research project which included improvements in skills and self-confidence. CONCLUSION: The peer researchers' involvement challenged assumptions about the inability of people with an intellectual disability and/or mental health problems to participate proactively in a research project whilst also highlighting the importance of training for all team members.

Making your own decisions is important. There are disabled people who need support to make some decisions. Supporting disabled people to make decisions is needed so that they are not excluded from society. However, the evidence is limited on disabled people's experiences of how best to support decision-making. This article will explore the experiences of four researchers with mental health problems or an intellectual disability who worked with other researchers to conduct a project on how people have, or have not been, supported to make their own decisions. These researchers are called peer researchers. The peer researchers interviewed 21 people with mental health problems and 20 people with an intellectual disability. These interviews were conducted in order to gain a detailed understanding of the experiences and preferences for how decision-making should be supported. Blogs written by the peer researchers, discussions in team meetings and a workshop at the end of the study enabled the peer researchers to reflect on their experiences. The peer researchers reported a number of positive effects of being involved in the research project which included improvements in skills and self-confidence. The peer researchers' involvement challenged assumptions about the inability of people with an intellectual disability and/or mental health problems to participate in a research project whilst also highlighting the importance of training for all team members.

'Getting our voices heard in research: a review of peer researcher's roles and experiences on a qualitative study of adult safeguarding policy.

BACKGROUND: Historically, disabled people have been marginalised in research that traditionally adopted a medical model perspective. Since the 1970's, there has been a shift from research on disabled people to research with disabled people with a strong emphasis on co-produced participatory research. Co-production involves disabled people working with academics to produce research and outcomes which are informed by the end user. This paper reflects on the role and experiences of peer researchers in co-producing a recent UK-wide research project called 'Getting our Voices Heard'. This project sought to identify the best approaches for people with a learning disability and their supporting organisations to influence adult safeguarding policies, across the four jurisdictions of the UK. METHODS: A co-produced participatory design was used to address the project aims; achieved through the establishment of a collaborative research team comprising academic researchers, key stakeholders and six peer researchers, each of whom had a learning disability. Semi-structured interviews were completed with senior policy makers. Following this, in each of the four Nations, an organisational case-study was completed (four in total). Organisations were purposively sampled to identify one organisation in each country which was recognised as being successful in influencing adult safeguarding policy. Data were gathered through focus groups discussions and semi-structured interviews with key stakeholders. Findings were developed into an Impact Strategy and Action Plan. Co-production methods were used throughout. RESULTS: Six individuals with a learning disability were recruited and trained to work as peer researchers, involved at key stages of the project, working alongside a wider research team. The role and experiences of the peer researchers in the context of policy are presented. Peer researchers provided largely positive first-hand accounts of their experiences. The importance of collaboration, the invaluable role of Learning Disability support organisations, and the need for additional time and resources to facilitate co-production, was noted. CONCLUSION: Whilst peer researchers were positive about their experiences, some success in promoting co-produced research and areas for improvement were evident. Collaboration at all stages would have been strengthened with research funding which enabled involvement of all team members in all research activities.

Since the 1970's, there has been a shift from research on disabled people to research with disabled people. This is often referred to as co-produced research. Co-production has a wide definition but includes disabled people working with academics to produce research and outcomes which neither group could achieve by working in isolation. This paper presents the co-production methodology used to conduct a research project called 'Getting our Voices Heard'. This project, sought to find the best way to get the voices of people with a learning disability heard inpolicy development in the UK.We explain how this research was carried out, using a co-produced participatory design. We established a research team with professional researchers from a university, who worked with peer researchers. Peer researchers are people who have lived experience of the issue being studied. In this project, we worked with six peer researchers who all had a learning disability.The experiences of the peer researchers, and ways in which the peer researchers were involved at each stage of the project are discussed. The peer researchers described feeling positive about their role and felt involved. We show that working together is important and recommend that additional time and resources  are  essential for this joint working.

Fast-growing growth hormone transgenic coho salmon (Oncorhynchus kisutch) show a lower incidence of vaterite deposition and malformations in sagittal otoliths.

In fish otoliths, CaCO3 normally precipitates as aragonite, and more rarely as vaterite or calcite. A higher incidence of vaterite deposition in otoliths from aquaculture-reared fish has been reported and it is thought that high growth rates under farming conditions might promote its deposition. To test this hypothesis, otoliths from growth hormone (GH) transgenic coho salmon and non-transgenic fish of matching size were compared. Once morphometric parameters were normalized by animal length, we found that transgenic fish otoliths were smaller (-24%, -19%, -20% and -30% for length, width, perimeter and area, respectively; P<0.001) and rounder (-12%, +13.5%, +15% and -15.5% in circularity, form factor, roundness and ellipticity; P<0.001) than otoliths from non-transgenic fish of matching size. Interestingly, transgenic fish had smaller eyes (-30% eye diameter) and showed a strong correlation between eye and otolith size. We also found that the percentage of otoliths showing vaterite deposition was significantly smaller in transgenic fish (21-28%) than in non-transgenic fish (69%; P<0.001). Likewise, the area affected by vaterite deposition within individual otoliths was reduced in transgenic fish (21-26%) compared with non-transgenic fish (42.5%; P<0.001). Our results suggest that high growth rates per se are not sufficient to cause vaterite deposition in all cases, and that GH overexpression might have a protective role against vaterite deposition, a hypothesis that needs further investigation.

'Getting involved in research': a co-created, co-delivered and co-analysed course for those with lived experience of health and social care services.

BACKGROUND: 'Getting Involved in Research' was co-created and delivered by a multi-organisational group to provide an accessible introduction to research for those with lived experience of health and social care services. METHOD: The evaluation of participants' perceptions adopted an exploratory mixed method research design and aimed to gather data to provide an in-depth understanding of the participants' experience of 'Getting Involved in Research' through the co-researchers' analysis of qualitative data using Participatory Theme Elicitation (PTE). PTE was used with the qualitative data to promote co-analysis by the course development group; analyses from an independent academic was also used to further validate the method of PTE. RESULTS: Thirty-five participants in total participated in 'Getting Involved in Research'. Age ranges varied from 19 to 73 years old. Participants were predominately female (n = 24), five males participated (n = 5) and there was one participant who identified as non-binary (n = 1). Six core themes were identified using the PTE approach: (1) A Meaningful Participatory Approach (2) Increasing the Confidence of Participants (3) Interactive Online Format (4) An Ambient Learning Environment (5) A Desire for Future Courses (6) A Balance of Course Content and Discussion. Participants in 'Getting Involved in Research' reported that the content of the training was applicable, relevant, fostered awareness of research methods and anticipated that it would support their involvement in research. CONCLUSION: 'Getting Involved in Research' has contributed innovatively to the evidence base for how to engage with and motivate those who have experience of health and social care to become actively involved in research. This study demonstrates that 'Getting Involved in Research' may be helpful to train those with lived experience and their care partners however, further research following up on the application of the course learning would be required to ascertain effectiveness. FUTURE DIRECTIONS: Future research should explore methods to apply research skills in practice to further develop participants' confidence in using the skills gained through 'Getting Involved in Research'.

The aim of this study was to gather information to help us understand the experience of participants' undertaking a research course called 'Getting Involved in Research'. A group of individuals including those with lived experience of health and social care services, academics, community and voluntary sector workers and a representative from the Department of Health in Northern Ireland worked together to develop a course to encourage and support people to engage with research. The 'Getting Involved in Research', course was designed to provide an understandable introduction to research for those people with lived experience of health and social care. We did this because research in health and social care sector should involve the patients and public who it is intended to help. The evaluation of the course had two distinct phases; we asked course participants to complete a survey before and after the course (pre- and post-course survey) and also asked them to complete a journal reflecting on their experiences after each lecture. This paper gives an overview of the profile of course participants and their responses to the survey questions. The survey answers were analysed using an approach to analysing information which encourages involvement from people with a range of experience of research methods, (known as Participatory Theme Elicitation). Thirty-five participants in total participated in 'Getting Involved in Research'. Age ranges varied from 19 to 73 years old. Participants were predominately female (n = 24), five males participated (n = 5) and there was one participant who identified as non-binary (n = 1). Participants in 'Getting Involved in Research' reported that the content of the course was relevant, encouraged awareness of research methods and encourage their future involvement in research.

Pilot study to investigate the effect of long-term exposure to high pCO2 on adult cod (Gadus morhua) otolith morphology and calcium carbonate deposition.

To date the study of ocean acidification on fish otolith formation has been mainly focused on larval and juvenile stages. In the present pilot study, wild-captured adult Atlantic cod (Gadus morhua) were exposed to two different levels of pCO2, 422µatm (ambient, low pCO2) or 1091µatm (high pCO2), for a period of 30 weeks (from mid-October to early April 2014-2015) in order to study the effects on otolith size, shape and CaCO3 crystallization amongst other biological parameters. We found that otoliths from cod exposed to high pCO2 were slightly smaller (- 3.4% in length; - 3.3% in perimeter), rounder (- 2.9% circularity and + 4% roundness) but heavier (+ 5%) than the low pCO2 group. Interestingly, there were different effects in males and females; for instance, male cods exposed to high pCO2 exhibited significant changes in circularity (- 3%) and roundness (+ 4%) compared to the low pCO2 males, but without significant changes on otolith dimensions, while females exposed to high pCO2 had smaller otoliths as shown for length (- 5.6%), width (- 2%), perimeter (- 3.5%) and area (- 4.8%). Furthermore, while the majority of the otoliths analysed showed normal aragonite deposition, 10% of fish exposed to 1091µatm of pCO2 had an abnormal accretion of calcite, suggesting a shift on calcium carbonate polymorph crystallization in some individuals under high pCO2 conditions. Our preliminary results indicate that high levels of pCO2 in adult Atlantic cod might affect otolith growth in a gender-specific way. Our findings reveal that otoliths from adult cod are affected by ocean acidification, and we believe that the present study will prompt further research into this currently under-explored area.

An exercise intervention for people with serious mental illness: Findings from a qualitative data analysis using participatory theme elicitation.

BACKGROUND: People with severe mental illness (SMI) often have poorer physical health than the general population. A coproduced physical activity intervention to improve physical activity for people with SMI in Northern Ireland was evaluated by co-researchers (researchers with lived experience of SMI) and academic researchers using a new approach to participatory data analysis called participatory theme elicitation (PTE). OBJECTIVE: Co-researchers and academic researchers analysed the data from the pilot study using PTE. This paper aimed to compare these analyses to validate the findings of the study and explore the validity of the PTE method in the context of the evaluation of a physical activity intervention for individuals with SMI. RESULTS: There was alignment and congruence of some themes across groups. Important differences in the analyses across groups included the use of language, with the co-researchers employing less academic and clinical language, and structure of themes generated, with the academic researchers including subthemes under some umbrella themes. CONCLUSIONS: The comparison of analyses supports the validity of the PTE approach, which is a meaningful way of involving people with lived experience in research. PTE addresses the power imbalances that are often present in the analysis process and was found to be acceptable by co-researchers and academic researchers alike.

Key components of supporting and assessing decision making ability.

People's ability to make decisions may be impaired for a wide range of reasons, including by mental health problems and learning disabilities. Individual autonomy, the ability to make decisions about our own lives, is a fundamental tenet of democratic societies. This has been reinforced by laws governing substitute and supported decision making and most significantly by the United Nations Convention on the Rights of Persons with Disabilities (UNCRPD). Article 12 of the UNCRPD requires everyone to have equal recognition before the law and, to achieve this, the necessary support and safeguards must be available. There has been considerable debate about the important theoretical and philosophical issues involved and growing research about the practice complexities of supporting and assessing decision making ability or mental capacity. This article aims to present some of the key components of the support and assessment process to inform further service development and training in this area. The key components were identified as part of a qualitative, participatory research project which explored the decision making experiences of people with mental health problems and/or learning disabilities. The conventional approach to the assessment of capacity is to consider four main components, whether the person is able to: understand, retain, use and weigh, and communicate the information needed to make the decision at that time. The findings from this research study suggest that people generally don't usually talk about their experiences of decision making in terms of these four components and approaches to supporting people to make decisions don't necessarily break the support down to explicitly address the assessment process. However, considering support for all aspects of the functional test may be helpful to ensure it is as comprehensive as possible. The challenges involved in providing effective support and assessing decision making ability are discussed and the article concludes with some of the implications for training, service development and practice.

Service users' experiences and views of support for decision-making.

This article presents the findings from a qualitative, participatory research project which explored how people with intellectual disabilities and/or mental health problems have, or have not been, supported to make their own decisions. The aim of the research is to help inform how supported decision-making, as required by Article 12 of the UN Convention on the Rights of Persons with Disabilities, can be effectively operationalised. The project provides an overview of experiences of support as well as identifying which supports are valued. It was conducted between July 2017 and July 2018 and was a partnership between disabled people, service providers and a University. It involved peer researchers interviewing 41 people with mental health problems and/or intellectual disabilities, in community settings, about their experiences and views of support. The key findings include that decision-making is a central aspect of people's lives. Participants discussed the positive role which decision-making can have but also how it felt when they were not supported to make their own decisions. Participants said that there were three main things that make decision-making harder: the type of decision; the role of other people; and what the outcome might be. Time was consistently identified as a very important factor. In terms of support, people said that they would like: practical support including more accessible information; emotional support including someone to talk to; and sometimes the options to choose from. There was very little mention of existing, more formal processes of support such as advance decisions or care planning. The peer researcher aspect of the project was valued by participants. The main implications of the research are for how support for decision-making should be provided including the need for an individualised approach as the support needed varies across decisions, time and people.

HBO1 directs histone H4 specific acetylation, potentiating mechano-transduction pathways and membrane elasticity in ovarian cancer cells.

New approaches to treat ovarian cancer, the fifth leading cause of cancer mortality among women, are being sought, with the targeting of epigenetic modulators now receiving much attention. The histone acetyltransferase HBO1 functions in regulating diverse molecular processes, including DNA repair, transcription and replication, and is highly expressed in primary ovarian cancer. Here we define both the molecular function and a role in cell biomechanics for HBO1 in ovarian cancer. HBO1 preferentially acetylates histone H4 through the concomitant overexpression of co-regulator JADE2, and is required for the expression of YAP1, an ovarian cancer oncogene and mechano-transductor signaling factor. HBO1 appears therefore to have a role in determining the mechano-phenotype in ovarian cancer cells, through both signal transduction processes, and the modulation of cell elasticity as observed using direct measurements on live cells via atomic force microscopy.

Strong Substrate Mediation of Attractive Lateral Interactions of CO on Cu(110).

The mechanism of chemical reactions between adsorbed species is defined by the combined effects of the adsorbate-substrate potential landscape and lateral interactions. Such lateral interactions are therefore integral to catalytic processes, but their study is often complicated by "substrate mediation", the regulation of a two-body potential between adsorbed particles by the surface itself. Substrate mediation can influence the sign and magnitude of lateral interactions. There are notable exceptions of ordered structures forming at low coverage, indicative of short-range attractive forces where repulsive forces are expected to dominate, suggesting a strong substrate-mediated contribution. To explore further the origins of such interactions, we have investigated the adsorption of CO on Cu(110) using a combination of low-temperature microscopy and first-principles calculations. Our studies reveal that lateral adsorbate interactions, which are constrained by the metal surface, regulate the bonding between the adsorbate and substrate. Anisotropic CO-CO coupling is seen to arise from a perfect balance between the intermolecular accumulation of charge that acts as a glue (chemical coupling) at sufficiently large distances to avoid repulsive effects (dipole-dipole coupling and Pauli's repulsion between electron clouds).

Examining the temporal behavior of the hydrocarbonaceous overlayer on an iron based Fischer-Tropsch catalyst.

In order to examine fundamental processes connected with the use of an unpromoted iron based Fischer-Tropsch synthesis (FTS) catalyst, model studies examining the temporal formation of hydrocarbonaceous species that form over the catalyst are undertaken using a combination of temperature-programmed oxidation, powder X-ray diffraction, Raman scattering, transmission electron microscopy and inelastic neutron scattering (INS). Catalyst samples were exposed to ambient pressure CO hydrogenation at 623 K for defined periods of time-on-stream (3, 6, 12 and 24 h) prior to analysis. INS reveals a progressive retention of hydrogenous species that is associated with the evolution of a hydrocarbonaceous overlayer, as evidenced by the presence of sp2 and sp3 hybridized C-H vibrational modes. Correlations between the formation of aliphatic and olefinic/aromatic moieties with post-reaction characterization leads to the proposal of a number of chemical transformations that, collectively, define the conditioning phase of the catalyst under the specified set of reaction conditions. A comparison between the inelastic neutron scattering spectra of the 24 h sample with that of an iron catalyst extracted from a commercial grade Fischer-Tropsch reactor validates the relevance of the experimental approach adopted.

Ocean acidification promotes otolith growth and calcite deposition in gilthead sea bream (Sparus aurata) larvae.

The effects of ocean acidification on otolith crystallization and growth rates were investigated in gilthead sea bream (Sparus aurata) larvae. Larvae were exposed to three different pH levels: pH8.2, pH7.7 and pH7.3 for a period of 18 days post-fertilization. For the first time, we demonstrate that pH has a significant impact on the carbonate polymorph composition, showing calcite in a significant percentage of individuals at low pH. Around 21% of the larvae exposed to pH7.3 showed irregular calcitic otoliths rather than commonly found round aragonitic otoliths. Calcitic otoliths showed a moderate level of heritability suggesting an important role of genetic factors. We also observed significantly larger otoliths in larvae reared at pH7.7 and pH7.3 compared to pH8.2 in both sagittae and lapilli. Our results demonstrate that otolith growth rates in gilthead sea bream larvae increase at low pH while a significant proportion of larvae are prone to the formation of calcitic otoliths at pH7.3.

Protein Disulfide Isomerase Modulates the Activation of Thyroid Hormone Receptors.

Thyroid hormone receptors (TRs) are responsible for mediating thyroid hormone (T3 and T4) actions at a cellular level. They belong to the nuclear receptor (NR) superfamily and execute their main functions inside the cell nuclei as hormone-regulated transcription factors. These receptors also exhibit so-called "non-classic" actions, for which other cellular proteins, apart from coregulators inside nuclei, regulate their activity. Aiming to find alternative pathways of TR modulation, we searched for interacting proteins and found that PDIA1 interacts with TRß in a yeast two-hybrid screening assay. The functional implications of PDIA1-TR interactions are still unclear; however, our co-immunoprecipitation (co-IP) and fluorescence assay results showed that PDI was able to bind both TR isoforms in vitro. Moreover, T3 appears to have no important role in these interactions in cellular assays, where PDIA1 was able to regulate transcription of TRα and TRß-mediated genes in different ways depending on the promoter region and on the TR isoform involved. Although PDIA1 appears to act as a coregulator, it binds to a TR surface that does not interfere with coactivator binding. However, the TR:PDIA1 complex affinity and activation are different depending on the TR isoform. Such differences may reflect the structural organization of the PDIA1:TR complex, as shown by models depicting an interaction interface with exposed cysteines from both proteins, suggesting that PDIA1 might modulate TR by its thiol reductase/isomerase activity.

Determining the Surface Structure of Silicated Alumina Catalysts via Isotopic Enrichment and Dynamic Nuclear Polarization Surface-Enhanced NMR Spectroscopy.

Isotopic enrichment of 29Si and DNP-enhanced NMR spectroscopy are combined to determine the detailed surface structure of a silicated alumina catalyst. The significant sensitivity enhancement provided by DNP is vital to the acquisition of multinuclear and multidimensional experiments that provide information on the atomic-level structure of the species present at the surface. Isotopic enrichment not only facilitates spectral acquisition, particularly given the low (1.5 wt %) Si loading, but also enables spectra with higher resolution than those acquired using DNP to be obtained. The unexpected similarity of conventional, CP, and DNP NMR spectra is attributed to the presence of adventitious surface water that forms a sufficiently dense 1H network at the silica surface so as to mediate efficient polarization transfer to all Si species regardless of their chemical nature. Spectra reveal the presence of Si-O-Si linkages at the surface (identified as Q4(3Al)-Q4(3Al)) and confirm that the anchoring of the surface overlayer with the alumina occurs through AlIV and AlV species only. This suggests the presence of Q3/Q4 Si at the surface affects the neighboring Al species, modifying the surface structure and making it less likely AlVI environments are in close spatial proximity. In contrast, Q1/Q2 species, bonded to the surface by fewer covalent bonds, have less of an effect on the surface, and more AlVI species are consequently found nearby. The combination of isotropic enrichment and DNP provides a definitive and fully quantitative description of the Si-modified alumina surface, and we demonstrate that almost one-third of the silicon at the surface is connected to another Si species, even at the low level of coverage used, lowering the propensity for the formation of Brønsted acid sites. This suggests that a variation in the synthetic procedure might be required to obtain a more even coverage for optimum performance. The work here will allow for more rigorous future investigations of structure-function relationships in these complex materials.

Development of 5N-Bicalutamide, a High-Affinity Reversible Covalent Antiandrogen.

Resistance to clinical antiandrogens has plagued the evolution of effective therapeutics for advanced prostate cancer. As with the first-line therapeutic bicalutamide (Casodex), resistance to newer antiandrogens (enzalutamide, ARN-509) develops quickly in patients, despite the fact that these drugs have ∼10-fold better affinity for the androgen receptor than bicalutamide. Improving affinity alone is often not sufficient to prevent resistance, and alternative strategies are needed to improve antiandrogen efficacy. Covalent and reversible covalent drugs are being used to thwart drug resistance in other contexts, and activated aryl nitriles are among the moieties being exploited for this purpose. We capitalized on the presence of an aryl nitrile in bicalutamide, and the existence of a native cysteine residue (Cys784) in the androgen receptor ligand binding pocket, to develop 5N-bicalutamide, a cysteine-reactive antiandrogen. 5N-bicalutamide exhibits a 150-fold improvement in Ki and 20-fold improvement in IC50 over the parent compound. We attribute the marked improvement in affinity and activity to the formation of a covalent adduct with Cys784, a residue that is not among the more than 160 androgen receptor point mutations associated with prostate cancer. Increasing the residence time of bound antiandrogen via formation of a covalent adduct may forestall the drug resistance seen with current clinical antiandrogens.