Cannabis and depression: A twin model approach to co-morbidity

Cannabis use disorder (CUD) co-occurs with major depressive disorder (MDD) more frequently than would be expected by chance. However, studies to date have not produced a clear understanding of the mechanisms underlying this co-morbidity. Genetically informative studies can add valuable insight to this problem, as they allow the evaluation of competing models of co-morbidity. This study uses data from the Australian Twin Registry to compare 13 co-morbidity twin models initially proposed by Neale and Kendler (Am J Hum Genet 57:935–953, 1995). The analysis sample comprised 2410 male and female monozygotic and dizygotic twins (average age 32) who were assessed on CUD and MDD using the SSAGA-OZ interview. Data were analyzed in OpenMx. Of the 13 different co-morbidity models, two fit equally well: CUD causes MDD and Random Multiformity of CUD. Both fit substantially better than the Correlated Liabilities model. Although the current study cannot differentiate between them statistically, these models, in combination, suggest that CUD risk factors may causally influence the risk to develop MDD, but only when risk for CUD is high

Hand eczema: possible risks and choice of therapy

Hand eczema is a common disease – up to 5% in the general population. In addition, eczema is closely related to atopy and, like atopic dermatitis, to a mutation in the FLG gene. In addition to genetic factors, eczema is caused by external irritants and toxic substances. Eczema often occurs in families with atopic diseases, including asthma, allergic rhinitis/hay fever (and food allergies), and atopic dermatitis. These diseases share a common pathogenesis and often occur together in the same person and/or family. Eczematous rashes are often accompanied by itching. This symptom can lead not only to sleep disturbances but also to secondary infections. According to some data, the rate of infections in eczema can be more than 70%. In such cases, the drugs of choice are combined glucocorticosteroids (GC), which in addition to GC contain an antimycotic and an antibiotic. Our practical experience shows the high effectiveness of the combination of beclomethasone dipropionate, gentamicin, and clotrimazole not only in cases of eczema complicated by secondary infection but also in patients with other infected chronic dermatoses. This article reviews these and other practical aspects and problems in the treatment of hand eczema, discusses the etiological factors that lead to the development of the disease, and presents current data from clinical recommendations and guidelines for the treatment of eczema