Arginine and Disordered Amyloid-β Peptide Structures: Molecular Level Insights into the Toxicity in Alzheimer’s Disease

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Pharmacotherapy and nutritional supplements for seasonal affective disorders: a systematic review

Introduction: A seasonal affective disorder (SAD) is a subtype of unipolar and bipolar major depressive disorders. It is characterized by its annual recurrence of depressive episodes at a particular season, mostly seen in winter and is responsible for 10–20% of the prevalence of major depressive disorders. Some pathophysiological hypotheses, such as the phase delay and the monoamine depletion hypotheses, have been postulated but the exact cause has not been fully unraveled yet. Studies on treatment for SAD in the last decade are lacking. To tackle this chronic disease, attention needs to be drawn to the gaps in this research field.

Areas covered: In this systematic review, the authors give a broad overview of the pharmacological therapy available for SAD. Also, nutritional substances fitting well with the postulated hypotheses are reviewed for the treatment and prevention of SAD. There is a specific focus on the quality of the currently performed studies.

Expert opinion: Light therapy and fluoxetine are the only proven and effective acute treatment options for SAD, while bupropion is the only registered drug for prevention of SAD. This area of research is in dire need of valid large-scale and sufficiently reproducible randomized control trials.     

Arthritis and antinuclear antibodies (ANA) with inherited deficiency of the sixth component of complement (C6).

We report here the case of a woman with joint pains found to have antinuclear antibodies and undetectable serum haemolytic complement. Investigation of her and her family members showed an inherited deficiency of C6.     

Subclasses of cyclic GMP-specific phosphodiesterase and their role in regulating the effects of atrial natriuretic factor

Two subclasses of cyclic guanosine monophosphate (GMP)-specific phosphodiesterases were identified in vascular tissue from several beds. The activity of one subclass (phosphodiesterase IB) was stimulated severalfold by calmodulin and selectively inhibited by the phosphodiesterase inhibitor TCV-3B. The activity of the other subclass (phosphodiesterase IC) was not stimulated by calmodulin and was selectively inhibited by the phosphodiesterase inhibitor M&B 22,948. To assess the involvement of both subclasses in regulating cyclic GMP-dependent responses, the ability of TCV-3B and M&B 22,948 to potentiate the in vitro and in vivo responses to the endogenous guanylate cyclase stimulator atrial natriuretic factor (ANF) was evaluated. Both TCV-3B and M&B 22,948 relaxed isolated rabbit aortic and pulmonary artery rings and also potentiated the relaxant effect of ANF. In addition, both inhibitors produced small increases in urine flow and sodium excretion in anesthetized rats and potentiated the diuretic and natriuretic responses to exogenous ANF. M&B 22,948 (30 micrograms/kg/min) produced a threefold increase in the natriuretic response to simultaneously administered ANF, and TCV-3B (10 micrograms/kg/min) produced a twofold increase in the response to ANF. The results of the present experiments suggest that both the calmodulin-sensitive and calmodulin-insensitive subclasses of cyclic GMP-specific phosphodiesterase play a role in regulating the in vitro and in vivo response to ANF.     

Preparedness Planning for Emergencies Among Postpartum Women in Arkansas During 2009

PurposeHaving an emergency plan may reduce negative effects of disaster on the health of postpartum women and their infants. However, little is known about the prevalence of emergency plans among postpartum women. In 2009, Arkansas added a question to the Pregnancy Risk Assessment Monitoring System surveillance system about whether women who gave birth that year had an emergency plan. In this study, we first describe the sociodemographic characteristics, disaster experience, and region of residence of postpartum women in Arkansas who indicated that they had an emergency plan for their families in 2009, and second, examine associations between sociodemographic characteristics and disaster experience and the presence of an emergency plan.MethodsMultivariable logistic regression (n = 1,173) was conducted to examine associations between maternal race/ethnicity, sociodemographic characteristics, region of residence, disaster experience, and having a disaster plan. We adjusted for maternal education, federal poverty level, and family size in our final model.FindingsForty-eight percent (n = 559) of women reported having an emergency plan. Hispanic women were less likely to report having a plan compared with non-Hispanic White women (n = 102 [10%]; adjusted prevalence ratio [aPR], 0.6; 95% confidence interval [CI], 0.4–0.9). Families with five or more members were more likely to have a plan compared with smaller families (n = 123 [11%]; aPR, 1.3; 95% CI, 1.1–1.6).ConclusionsPolicymakers and public health practitioners can use these results to promote emergency planning among postpartum women in Arkansas, with special outreach to postpartum women who are Hispanic or have smaller families.     

Coffee,caffeine, and risk of completed suicide: Results from three prospective cohorts of American adults

Objective.To evaluate the association between coffee and caffeine consumption and suicide risk in three large-scale cohorts of US men and women. Methods. We accessed data of 43,599 men enrolled in the Health Professionals Follow-up Study (HPFS, 1988–2008), 73,820 women in the Nurses’ Health Study (NHS, 1992–2008), and 91,005 women in the NHS II (1993–2007). Consumption of caffeine, coffee, and decaffeinated coffee, was assessed every 4 years by validated food-frequency questionnaires. Deaths from suicide were determined by physician review of death certificates. Multivariate adjusted relative risks (RRs) were estimated with Cox proportional hazard models. Cohort specific RRs were pooled using random-effect models. Results. We documented 277 deaths from suicide. Compared to those consuming ≤ 1 cup/week of caffeinated coffee (< 8 oz/237 ml), the pooled multivariate RR (95% confidence interval [CI]) of suicide was 0.55 (0.38–0.78) for those consuming 2–3 cups/day and 0.47 (0.27–0.81) for those consuming ≥ 4 cups/day (P trend < 0.001). The pooled multivariate RR (95% CI) for suicide was 0.75 (0.63–0.90) for each increment of 2 cups/day of caffeinated coffee and 0.77 (0.63–0.93) for each increment of 300 mg/day of caffeine. Conclusions. These results from three large cohorts support an association between caffeine consumption and lower risk of suicide.