The Walking Wounded: Emerging Treatments for PTSD

Study protocol: A multimethod psychophysiological randomized controlled trial of a couple therapy for post-traumatic stress disorder

Posttraumatic stress disorder (PTSD) sequelae often have ripple effects on victims' families and spouses. Yet there has been a lag in the development and study of couple therapy for PTSD. To fill this gap, we present here a protocol for a study examining the efficacy of Cognitive Behavioral Conjoint Therapy (CBCT), a 15- session couple therapy protocol meant to alleviate PTSD and improve relationship satisfaction, in the Israeli context. The study will be a randomized controlled trial examining outcomes and processes of change via self-report questionnaires, qualitative interviews, and physiological measures (e.g., both partners' heart rate variability and electrodermal activity). We will employ a modified remote treatment protocol via video conferencing. The study will examine whether there is a reduction in couples' levels of symptomatic, emotional, and behavioral difficulties following CBCT and whether relationship satisfaction and couples' physiological synchrony increases. The study will also examine physiological and psychological change mechanisms in CBCT. Sixty Israeli couples (n = 120) will be randomly assigned to either a CBCT group or a wait-list control group. Outcomes will be assessed at four timepoints: before treatment, during treatment, post-treatment, and four months after treatment. The proposed study has the potential to shed light on the unique psychological and physiological mechanisms underlying CBCT and will be the first RCT study to employ this unique methodology in CBCT research, particularly in a video conferencing setting. This study may increase our ability to offer effective, cost-efficient, and attainable treatments for patients with PTSD and their spouses.

Exploring the transmucosal permeability of cyclobenzaprine: A comparative preformulation by standardized and controlled ex vivo and in vitro permeation studies

As part of early drug development, preformulation studies are used to comprehensively explore the properties of new drugs. In particular, this includes the biopharmaceutical characterization and evaluation of impacting factors (e.g. excipients, microenvironmental conditions etc.) by permeation studies. To overcome the limitations of current studies, a novel standardized ex vivo procedure using esophageal mucosa as surrogate has been established successfully and applied to preformulation studies for oromucosal delivery of cyclobenzaprine hydrochloride, a tricyclic muscle relaxant with potential for psychopharmacotherapeutic use. By using the standardized ex vivo permeation process, a twofold enhancement of permeability (0.98 ± 0.16 to 1.96 ± 0.10 * 10^-5 cm/s) was observed by adjustment and controlling of microenvironmental pH, empowering a targeted and effective development of sublingual formulations. Predictivity and suitability were superior compared to in vitro experiments using artificial biomimetic membranes, revealing a determination coefficient (R²) of 0.995 vs. 0.322 concerning pH-dependent permeability of cyclobenzaprine. In addition, diffusion properties were extensively examined (e.g. influence of mucosal thicknesses, tissue freezing etc.). The alignment of the study design regarding physiologically/clinically relevant conditions resulted in ex vivo data that allowed for the estimation of plasma AUC levels in the extend of reported in vivo ranges.

MDMA-assisted psychotherapy for people diagnosed with treatment-resistant PTSD: what it is and what it isn't

BACKGROUND

PTSD is a chronic condition with high rates of comorbidity, but current treatment options are limited and not always effective. One novel approach is MDMA-assisted psychotherapy for people diagnosed with treatment-resistant PTSD, where MDMA is used as a catalyst to facilitate trauma processing during psychotherapy. The aim was to review all current research into MDMA-assisted psychotherapy for PTSD.

METHODS

Articles were identified through PubMed and Science Direct for items published up to 31st March 2019 using terms "treatments for PTSD", "drug treatments for PTSD", "MDMA", "MDMA pathway", "MDMA-assisted psychotherapy" and "MDMA-assisted psychotherapy for PTSD". Articles were identified through Google Scholar and subject-specific websites. Articles and relevant references cited in those articles were reviewed.

RESULTS

Small-scale studies have shown reduced psychological trauma, however there has been widespread misunderstanding of the aims and implications of this work, most commonly the notion that MDMA is a 'treatment for PTSD', which to date has not been researched. This has harmful consequences, namely dangerous media reporting and impeding research progression in an already controversial field.

CONCLUSIONS

MDMA-assisted psychotherapy may help people who have experienced psychological trauma and who have not been able to resolve their problems through existing treatments, however more research is needed. If this is to get appropriate research attention, we must report this accurately and objectively.

Predator-induced fear causes PTSD-like changes in the brains and behaviour of wild animals

Predator-induced fear is both, one of the most common stressors employed in animal model studies of post-traumatic stress disorder (PTSD), and a major focus of research in ecology. There has been a growing discourse between these disciplines but no direct empirical linkage. We endeavoured to provide this empirical linkage by conducting experiments drawing upon the strengths of both disciplines. Exposure to a natural cue of predator danger (predator vocalizations), had enduring effects of at least 7 days duration involving both, a heightened sensitivity to predator danger (indicative of an enduring memory of fear), and elevated neuronal activation in both the amygdala and hippocampus – in wild birds (black-capped chickadees, Poecile atricapillus), exposed to natural environmental and social experiences in the 7 days following predator exposure. Our results demonstrate enduring effects on the brain and behaviour, meeting the criteria to be considered an animal model of PTSD – in a wild animal, which are of a nature and degree which can be anticipated could affect fecundity and survival in free-living wildlife. We suggest our findings support both the proposition that PTSD is not unnatural, and that long-lasting effects of predator-induced fear, with likely effects on fecundity and survival, are the norm in nature.