Resident cardiac macrophages mediate adaptive myocardial remodeling.

Cardiac macrophages represent a heterogeneous cell population with distinct origins, dynamics, and functions. Recent studies have revealed that C-C Chemokine Receptor 2 positive (CCR2+) macrophages derived from infiltrating monocytes regulate myocardial inflammation and heart failure pathogenesis. Comparatively little is known about the functions of tissue resident (CCR2-) macrophages. Herein, we identified an essential role for CCR2- macrophages in the chronically failing heart. Depletion of CCR2- macrophages in mice with dilated cardiomyopathy accelerated mortality and impaired ventricular remodeling and coronary angiogenesis, adaptive changes necessary to maintain cardiac output in the setting of reduced cardiac contractility. Mechanistically, CCR2- macrophages interacted with neighboring cardiomyocytes via focal adhesion complexes and were activated in response to mechanical stretch through a transient receptor potential vanilloid 4 (TRPV4)-dependent pathway that controlled growth factor expression. These findings establish a role for tissue-resident macrophages in adaptive cardiac remodeling and implicate mechanical sensing in cardiac macrophage activation.

Therapeutic alliance in family therapy and clinical outcomes among adolescents at risk for mood disorders.

BACKGROUND: Family-focused therapy (FFT) is associated with longer intervals between mood episodes and reductions in suicidal ideation among adolescents at risk for bipolar disorders. However, the mediating processes underlying the efficacy of FFT are not well understood. In an open trial of an 18-week FFT program, we explored the association between the therapeutic alliance of adolescents/parents with their therapists and the symptomatic outcomes of adolescents over 18 weeks. METHOD: Participants were enrolled in a treatment development trial of FFT supplemented with a mobile app. We used the System for Observing Family Therapeutic Alliances (SOFTA) to rate alliance between adolescents, parents, and therapists using videotaped FFT sessions from the beginning and end of treatment. Pearson correlations were computed between SOFTA alliance ratings and changes in Children's Depression Rating Scale, Revised (CDRS-R) scores over 18 weeks of treatment. RESULTS: SOFTA ratings were obtained from sessions conducted with 17 adolescents (mean age 14.9+/-2.0 years; 41.2% female) and 22 parents. CDRS-R ratings were obtained from 16 adolescents at baseline and 18 weeks. Parents had significantly higher levels of engagement and emotional connection with therapists than their offspring. Adolescents' therapeutic engagement scores were significantly correlated with reductions in CDRS scores over 18 weeks (r(14) = -0.58, p = 0.018; N = 16). LIMITATIONS: We could not draw conclusions about the causal relationship between therapeutic alliance and improvement in depression. CONCLUSIONS: Among high-risk adolescents undergoing FFT, therapeutic alliance is associated with clinical improvement over 4 months. Strategies to enhance adolescent engagement may strengthen the long-term effects of family interventions.

Treatment of Spider Phobia Using Repeated Exposures and Adjunctive Repetitive Transcranial Magnetic Stimulation: A Proof-of-Concept Study.

Background: Specific phobias represent the largest category of anxiety disorders. Previous work demonstrated that stimulating the ventromedial prefrontal cortex (vmPFC) with repetitive Transcranial Magnetic Stimulation (rTMS) may improve response to exposure therapy for acrophobia. Objective: To examine feasibility of accelerating extinction learning in subjects with spider phobia using intermittent Theta Burst Stimulation (iTBS) rTMS of vmPFC. Methods: In total, 17 subjects with spider phobia determined by spider phobia questionnaires [Spider Phobia Questionnaire (SPQ) and Fear of Spiders questionnaire (FSQ)] underwent ratings of fear of spiders as well as behavioral and skin conductance data during a behavioral avoidance test (BAT). Subjects then received a sequential protocol of in vivo spider exposure followed by iTBS for three sessions administered to either active or control treatment sites (vmPFC [n = 8] or vertex [n = 9], respectively), followed 1 week later by repetition of questionnaires and BAT. Results: All subjects improved significantly regardless of group across both questionnaires (FSQ η2 = 0.43, p = 0.004; SPQ η2 = 0.39, p = 0.008) and skin conductance levels during BAT (Wald χ2 = 30.9, p < 0.001). Subjects in the vmPFC group tolerated lower treatment intensity than in the control group, and there was a significant correlation between treatment intensity, BAT subjective distress improvement, and physiologic measures (all ρ > 0.5). Conclusion: This proof-of-concept study provides preliminary evidence that a sequential exposure and iTBS over vmPFC is feasible and may have rTMS intensity-dependent effects on treatment outcomes, providing evidence for future areas of study in the use of rTMS for phobias.