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1. As many species of marine benthic invertebrates have a limited capacity for movement as adults, dispersal mode is often considered as a determinant of geographical ranges, genetic structure and evolutionary history. Species that reproduce without a larval stage can only disperse by floating or rafting. It is proposed that the colonization processes associated with such direct developing species result in spatial distributions that show relatively greater fine scale patchiness than the distributions of species with a larval dispersal stage. This hypothesis was tested by collecting molluscs at different spatial scales in the Isle of Man. 2. Spatial distribution patterns supported the predictions based on dispersal mode. Estimated variance components for species with larval dispersal suggested that the majority of the spatial variation was associated with variation between shores. In comparison, there was relatively more variability within shores for abundance counts of species with direct development. 3. Multivariate analyses reflected the univariate results. An assemblage of direct developers provided a better discrimination between sites (100 m separation) but the group of species with larval dispersal gave a clearer separation of shores (separated by several km). 4. The fine scale spatial structure of direct developing species was reflected in higher average species diversity within quadrats. Species richness also reflected dispersal mode, with a higher fraction of the regional species pool present for direct developers in comparison to species with larval dispersal. This may reflect the improved local persistence of taxa that avoid the larval dispersal stage.

Brexpiprazole, when administered with antidepressant therapy, may provide additional benefits due to complementary actions on noradrenaline (norepinephrine), serotonin, and dopamine neurotransmitter systems. This review addressed the question: what information can preclinical studies provide on the use of brexpiprazole + antidepressant treatment? A systematic literature review was conducted to search for preclinical studies of brexpiprazole + antidepressant therapy that included a behavioral test relating to any psychiatric disorder. Ovid MEDLINE, Ovid Embase, and conference abstracts were searched (January 1, 2011-July 5, 2021). The statistically significant (p<0.05) findings for brexpiprazole + antidepressant were extracted. Of 296 records screened, nine articles were eligible, describing seven unique studies. In rodent models, including three models of depression (unpredictable chronic mild stress, social defeat stress, and lipopolysaccharide-induced depression), brexpiprazole + selective serotonin reuptake inhibitor (SSRI) or serotonin-noradrenaline reuptake inhibitor (SNRI) consistently showed statistically significant benefits over vehicle on depression-like behaviors (forced swim test, tail suspension test, sucrose preference), whereas brexpiprazole and antidepressant monotherapies did not. In the predator scent stress model of post-traumatic stress disorder (PTSD), brexpiprazole + SSRI (escitalopram) showed a significant benefit over vehicle and/or monotherapy on anxiety-like behaviors (elevated plus-maze) and hyperalertness (acoustic startle response), whereas brexpiprazole and escitalopram monotherapies did not significantly differ from vehicle. In the fear conditioning model of PTSD, brexpiprazole showed significant improvements whether administered as monotherapy or in combination with escitalopram. Based on a small number of studies, the administration of brexpiprazole with an antidepressant appears to have a greater treatment effect than either brexpiprazole or antidepressant monotherapies in preclinical studies of depression- and PTSD-like behaviors. Thus, preclinical studies support evidence from randomized clinical trials for the therapeutic effects of adjunctive brexpiprazole in the treatment of major depressive disorder, and brexpiprazole in combination with sertraline in the treatment of PTSD. Funding: Otsuka/Lundbeck.

Keell et al tested the safety and acceptability of the shuttle-walk test in patients with chronic heart failure and examined the relationship between test performance and maximum oxygen uptake.

Geographical information system analysis was applied to assist in the re-identification of records of Chaetozone setosa from the north-east Atlantic. Previously this species was considered to have a world-wide distribution. The aim of this study is to clarify and illustrate the distribution patterns associated with sediment and water characteristics of C. setosa and other Chaetozone species.

Myelination of the frontal and temporal lobes occurs at a similar time period as symptom onset in schizophrenia. To assess this potential relationship, we compared myelination and oligodendrocyte numbers in the hippocampal formation of controls and matched subjects with schizophrenia and bipolar disorder. The levels and distribution of the myelin marker myelin basic protein (MBP) and the oligodendrocyte marker adenomatous polyposis coli (APC) were measured using immunocytochemistry. MBP immunoreactivity (IR) was increased in several hippocampal subregions of control females versus control males. Female subjects with schizophrenia and bipolar disorder exhibited decreased myelination in the hippocampal formation while male subjects with bipolar disorder showed increased MBP levels in the superior medullary lamina. In contrast, the number of APC immunoreactive cells did not differ in any disorder or region. Our results demonstrate an interaction between gender, mental illness, and myelination, and may be related to cognitive deficits seen in schizophrenia and bipolar disorder.

Issue Title: Advances in Polychaete Research Originally described from Spitzbergen, Greenland, Iceland and Scandinavia, Chaetozone setosa is now widely recognised to be a species complex by workers involved in analysing survey material in the northeast Atlantic. Chaetozone species were examined from wide-scale surveys of the Faroe-Shetland Channel and nearby areas, which included water depths ranging from 100 to 2000 m and diverse hydrographic conditions. Comparisons were made with other deep-water material from around Iceland. There appear to be at least five Chaetozone species occurring in the cold, deeper waters of the area. One of the commonest of these, from the lower West Shetland Continental Slope (Faroe-Shetland Channel) and the Iceland-Faroe Rise, is described as a new species.[PUBLICATION ABSTRACT]

Recombinant antibody technology and the ability to manipulate antibody binding characteristics offers much potential to agri-food analysis, and in particular to the generation of antibodies against pesticides. As part of the development of a mutagenesis strategy aimed at changing antibody specificity, the sequence of an scFv recombinant antibody specific to ethyl-parathion has been used to generate a molecular model using ProMod software. Docking studies showed the involvement in the binding pocket of CDR H 3 , as expected, but also of CDR L 2 and of small areas of the framework region of the light chain, based on the Kabat definition of CDRs. The majority of the L 2 contacts do, however, fall within a recently proposed re-definition of L 2 . The validity of the model was supported by comparing docking studies of structurally related pesticides with cross-reaction data from an ELISA.

Background The hamstrings are an important muscle group that contribute to horizontal force during sprint acceleration and are also the most injured muscle group in running-based sports. Given the significant time loss associated with hamstrings injury and impaired sprinting performance following return to sport, identifying exercises that drive adaptations that are both protective of strain injury and beneficial to sprint performance is important for the strength and conditioning professional. This paper describes the study protocol investigating the effects of a 6-week training program using either the hip-dominant Romanian deadlift (RDL) or the knee-dominant Nordic hamstring exercise (NHE) on hamstring strain injury risk factors and sprint performance. Methods A permuted block randomized (1:1 allocation) intervention trial will be conducted involving young, physically-active men and women. A target sample size of 32 will be recruited and enrolled participants will undergo baseline testing involving extended-field-of-view ultrasound imaging and shear wave elastography of the biceps femoris long head muscle, maximal hamstrings strength testing in both the RDL and NHE, and on-field sprint performance and biomechanics. Participants will complete the 6-week training intervention using either the RDL or NHE, according to group allocation. Baseline testing will be repeated at the end of the 6-week intervention followed by 2 weeks of detraining and a final testing session. The primary outcome will be regional changes in fascicle length with secondary outcomes including pennation angle, muscle cross sectional area, hamstring strength, and maximal sprint performance and biomechanics. An exploratory aim will determine changes in shear wave velocity. Discussion Despite extensive research showing the benefits of the NHE on reducing hamstring strain injury risk, alternative exercises, such as the RDL, may offer similar or potentially even greater benefits. The findings of this study will aim to inform future researchers and practitioners investigating alternatives to the NHE, such as the RDL, in terms of their effectiveness in reducing rates of hamstring strain injury in larger scale prospective intervention studies. Trial Registration The trial is prospectively registered on ClinicalTrials.gov (NCT05455346; July 15, 2022).