Increased persuadability and credulity in people with corpus callosum dysgenesis.

Corpus callosum dysgenesis is one of the most common congenital neurological malformations. Despite being a clear and identifiable structural alteration of the brain's white matter connectivity, the impact of corpus callosum dysgenesis on cognition and behaviour has remained unclear. Here we build upon past clinical observations in the literature to define the clinical phenotype of corpus callosum dysgenesis better using unadjusted and adjusted group differences compared with a neurotypical sample on a range of social and cognitive measures that have been previously reported to be impacted by a corpus callosum dysgenesis diagnosis. Those with a diagnosis of corpus callosum dysgenesis (n = 22) demonstrated significantly higher persuadability, credulity, and insensitivity to social trickery than neurotypical (n = 86) participants, after controlling for age, sex, education, autistic-like traits, social intelligence, and general cognition. To explore this further, we examined the covariance structure of our psychometric variables using a machine learning algorithm trained on a neurotypical dataset. The algorithm was then used to test whether these dimensions possessed the capability to discriminate between a test-set of neurotypical and corpus callosum dysgenesis participants. After controlling for age and sex, and with Leave-One-Out-Cross-Validation across 250 training-set bootstrapped iterations, we found that participants with a diagnosis of corpus callosum dysgenesis were best classed within dimension space along the same axis as persuadability, credulity, and insensitivity to social trickery, with a mean accuracy of 71.7%. These results have implications for a) the characterisation of corpus callosum dysgenesis, and b) the role of the corpus callosum in social inference.

"I'm Human After All": Autism, Trauma, and Affective Empathy.

Academic literature has long associated autism with empathy deficits. Although this view has been attenuated over time to include only cognitive empathy, earlier perceptions continue to influence popular representations of autism and screening/diagnostic tools. As a result, empathetic autistics may be prevented from accessing diagnosis, and those with a diagnosis may experience internalized stigma or violence under the guise of therapy. There are, however, some autistics who do self-identify as having empathy difficulties. The purpose of this perspective piece was to first trouble the view of empathy "deficit" as intrinsic within autism and consider alternative explanations and, second, to more deeply consider post-traumatic stress disorder (PTSD) as a factor for autistic people who self-identify as having empathy difficulties. Using both literature and author narrative, we argue that autistics are more likely to experience trauma and more vulnerable to developing PTSD, but less likely to receive a diagnosis of PTSD than nonautistics, as their PTSD-related symptoms, such as a lack of affective empathy, may be conflated with autism traits. Our main recommendations are: (1) future studies should investigate the possible interactions between autism, trauma, PTSD, and affective empathy, determining whether autistic adults with PTSD may recover affective empathy following therapy; (2) clinicians should look beyond autism if their client identifies a lack of affective empathy as part of their challenges; (3) and clinicians should adapt diagnostic procedures for PTSD in autistic adults to accommodate those with alexithymia, and exercise caution when using screening tools for autism, allowing empathic autistic adults to access diagnosis. Lay summary: What is the topic of this article and why is it important?: Many people believe that autism causes a lack of empathy. This belief is a problem because it denies the lived experience of autistic adults and makes them appear as less than human. It can also lead to violence against autistics, and it can mean that empathic autistic adults miss out on an autism diagnosis. As a result, they may not be able to access necessary supports. This situation may cause suffering for autistic adults.What is the perspective of the authors?: R.H. is an autistic woman diagnosed in adulthood, who is often overwhelmed by too much empathy. She worked as an employment mentor for autistics and is now a PhD candidate researching relationship-building between autistic service users and their support professionals. H.B. is an autistic man diagnosed in childhood. As a teenager, he was also diagnosed with post-traumatic stress disorder (PTSD), a mental disorder caused by trauma. He did not feel any empathy for most of his life and felt very distressed by this, as he thought that it was a permanent trait of his autism. However, he started feeling empathy after trauma therapy and falling in love. Both authors believe that autistic adults can experience all forms of empathy.What arguments do the authors make?: The authors cite research that shows other reasons which may explain the autism-empathy myth: (1) nonautistics may not recognize empathy in autistics because of mutual differences, (2) nonautistics may not believe autistics who say they have empathy because old research suggested that this is impossible, and (3) empathy research on autistics may not be correct because it uses inappropriate methods. The authors then suggest that unrecognized PTSD may be the reason why some autistics have difficulties in this area. They think so because PTSD can shut down emotional empathy. Autistics are more likely to experience trauma, more vulnerable to developing PTSD, and less likely to receive a diagnosis of PTSD than nonautistics.What do the authors recommend?: 1.Researchers should work with autistic adults who report difficulty in feeling empathy to determine whether they may have PTSD and/or recover empathy after trauma therapy.2.Professionals who support autistic adults should look beyond autism if their client identifies a lack of empathy as part of their challenges.3.Clinicians should treat questions relating to empathy with caution when using autism screening/diagnostic tools, allowing empathic autistic adults to access diagnosis and appropriate supports.How will these recommendations help autistic adults now or in the future?: We hope that this will lead to better support for autistics who have PTSD, and less biased referral and diagnostic procedures for those who do not. We also hope that autistic adults might feel less stigma by suggesting PTSD, not autism, as the underlying cause if they have difficulties feeling empathy.

Improving dialogue among researchers, local and indigenous peoples and decision-makers to address issues of climate change in the North.

The Circumpolar North has been changing rapidly within the last decades, and the socioeconomic systems of the Eurasian Arctic and Siberia in particular have displayed the most dramatic changes. Here, anthropogenic drivers of environmental change such as migration and industrialization are added to climate-induced changes in the natural environment such as permafrost thawing and increased frequency of extreme events. Understanding and adapting to both types of changes are important to local and indigenous peoples in the Arctic and for the wider global community due to transboundary connectivity. As local and indigenous peoples, decision-makers and scientists perceive changes and impacts differently and often fail to communicate efficiently to respond to changes adequately, we convened a meeting of the three groups in Salekhard in 2017. The outcomes of the meeting include perceptions of how the three groups each perceive the main issues affecting health and well-being and recommendations for working together better.

Small molecule inhibitors of plasma kallikrein.

Plasma kallikrein is a serine protease that is involved in pathways of inflammation, complement fixation, coagulation, and fibrinolysis. Herein, we describe the SAR and structural binding modes of a series of inhibitors of plasma kallikrein as well as the pharmacokinetics of a lead analog 11 in rat.

Factor VIIa inhibitors: gaining selectivity within the trypsin family.

Within the trypsin family of coagulation proteases, obtaining highly selective inhibitors of factor VIIa has been challenging. We report a series of factor VIIa (fVIIa) inhibitors based on the 5-amidino-2-(2-hydroxy-biphenyl-3-yl)-benzimidazole (1) scaffold with potency for fVIIa and high selectivity against factors IIa, Xa, and trypsin. With this scaffold class, we propose that a unique hydrogen bond interaction between a hydroxyl on the distal ring of the biaryl system and the backbone carbonyl of fVIIa lysine-192 provides a basis for enhanced selectivity and potency for fVIIa.

Optimization of a screening lead for factor VIIa/TF.

The structure-based design and progression of a screening lead to a 3nM factor VIIa/TF inhibitor with improved selectivity versus related enzymes is described.

Development of potent and selective factor Xa inhibitors.

The development of potent and selective small molecule inhibitors of factor Xa is described.