Genetics and psychotic disorders: A fresh look at consanguinity

Preliminary studies on apparent mendelian psychotic disorders in consanguineous families

BACKGROUND

Psychiatric disorders are characterized by alteration in emotions, mood and behavior. Genetics is known to play a significant role in the development of psychiatric disorders. Genome-wide association studies have identified several loci associated with psychiatric illnesses. We hypothesize the existence of rare variants following Mendelian recessive mode of inheritance. These variants can be identified in families with multiple affected individuals born to unaffected consanguineous parents.

METHODS

We visited psychiatric outpatient departments of multiple hospitals in Lahore, Pakistan. We focused on psychosis, as it can occur in several DSM disorders such as schizophrenia, dementia and bipolar disorder. After clinical diagnosis by an American trained psychiatrist, detailed clinical assessments using Diagnostic Interview for Genetic Studies (DIGS), Diagnostic Interview for Psychosis and Affective Disorders (DI-PAD), Positive and Negative Syndrome Scale (PANSS), Hamilton Depression and Anxiety Rating Scale (HAM-D; HAM-A) were administered to all willing affected and unaffected participants.

RESULTS

We identified eight pedigrees with two or more psychotic individuals in each family. Clinical diagnoses determined by their psychiatrists included ten individuals with schizophrenia; four individuals with psychosis and bipolar disorder; and two patients with "unspecified psychosis." The rating instruments rigorously confirmed the diagnosis of psychosis in the affected patients from the six families as well as the absence of psychotic disorders in unaffected individuals from the six families. We obtained DNA samples from willing members of all eight families for future genetic analyses.

CONCLUSION

Our research highlights an alternative approach to discovery of rare recessively inherited genetic variants causing psychiatric disorders that have remained unidentified to date. These findings could illuminate underlying biological mechanisms leading toward development of targeted therapies in future.

Assessing sense of coherence as an element of primary-focused health services in schools for children and adolescents with complex health care needs

AIM

This study aimed to clarify if sense of coherence (SOC) could be used as an element of primary-focused health services in schools.

BACKGROUND

The United Arab Emirates (UAE) is striving to develop a high-quality, primary-focused health care system. School health care services are well established in the UAE but have not yet been fully used to play a key role in this development.

METHODS

This is a cross-sectional survey study to explore adolescents' SOC and their behavioural, psychosocial and clinical outcomes.

RESULTS

A total of 408 adolescents participated in this study. Compared with others, adolescents with higher SOC had better adherence to treatment, fewer visits to the school nurse, better self-efficacy, fewer hyperactivity problems, fewer emotional problems, more prosocial behaviours and fewer conduct problems.

CONCLUSION

Implementing interventions that improve SOC may support improved well-being among adolescents. The findings also support the use of SOC and salutogenesis as a framework to reinforce primary health care services for this population.

IMPLICATIONS FOR NURSING MANAGEMENT

Health service managers can utilize SOC as a framework to focus service on illness prevention and health promotion, they should collaborate with education authorities to include more health-related topics as part of school curricula to promote students' SOC and, finally, they should assess and build awareness of SOC and associated tools among school nurses and primary health care providers.

Coping among adolescents with long-term health conditions: a mixed-methods study

BACKGROUND

Adolescents with long-term health conditions may be at risk of developing psychological comorbidities and adopting ineffective coping mechanisms if they are not adequately supported at home or school.

AIM

To understand the strategies adolescents use when dealing with challenging health situations, and gain an in-depth understanding of the characteristics of their preferred care environment if they have unexpected health crises.

DESIGN

The study used a concurrent mixed-methods design, with data gathered between January and May 2019. Descriptive and non-parametric tests were used to analyse quantitative and qualitative data.

RESULTS

'Problem-focused disengagement' was the most-often used coping strategy. The second and third most common strategies were 'problem-focused engagement' and 'emotion-focused engagement'. Finally, girls tended to adopt more negative coping strategies than boys. The analysis revealed that most adolescents preferred home over school as the care environment because these caring agents were close and available, knew how to care for them and had the resources to provide or access care, and listened and understood them.

CONCLUSION

Adolescents adopted disengagement and negative coping strategies early in their attempts to cope with stressful events before adopting more positive strategies. This is alarming, especially as school health services are not sufficiently supportive of adolescents at times of stress and illness. Adolescents often perceive school providers as unavailable and lacking knowledge about their health needs.

Mental health literacy of school nurses in the United Arab Emirates

BACKGROUND

To support promotion, prevention and early intervention for mental illness school nurses need to be mental health literate.

METHODS

Three hundred and thirty-nine school nurses employed in government and private schools from three Emirates in the UAE were surveyed. A culturally adapted Mental Health Literacy questionnaire comprising three vignettes of fictional characters meeting diagnostic criteria for the target conditions along with the Kessler Psychological Distress Scale (K10) was administered to ascertain school nurses' ability to correctly identify the conditions and to elicit beliefs about helpfulness of treatment interventions and of health care providers for these conditions.

RESULTS

Less than 50% of the respondents correctly identified the disorders presented, while accurate identification of evidence-based interventions was also limited. Correlations between level of psychological distress and level of inaccurate survey responses was also revealed, respondents who correctly identified the correct diagnosis of the vignette and the most appropriate interventions were those who had a significantly lower K10 score.

CONCLUSIONS

Low levels of mental health literacy amongst respondents in combination with potential religious and cultural factors as reported in the literature, highlight the need for curriculum enhancements for future health professionals and a targeted program of culturally appropriate professional development focused on mental health promotion for those in clinical practice. The level of psychological distress noted in this cohort also signals a need to ensure that appropriate supports are available for clinical staff employed in schools.

Shifting the focus toward rare variants in schizophrenia to close the gap from genotype to phenotype

Schizophrenia (SZ) is a disorder with a high heritability and a complex architecture. Several dozen genetic variants have been identified as risk factors through genome-wide association studies including large population-based samples. However, the bulk of the risk cannot be accounted for by the genes associated to date. Rare mutations have been historically seen as relevant only for some infrequent, Mendelian forms of psychosis. Recent findings, however, show that the subset of patients that present a mutation with major effect is larger than expected. We discuss some of the molecular findings of these studies. SZ is clinically and genetically heterogeneous. To identify the genetic variation underlying the disorder, research should be focused on features that are more likely a product of genetic heterogeneity. Based on the phenotypical correlations with rare variants, cognition emerges as a relevant domain to study. Cognitive disturbances could be useful in selecting cases that have a higher probability of carrying deleterious mutations, as well as on the correct ascertainment of sporadic cases for the identification of de novo variants.

Update on bipolar disorder biomarker candidates

INTRODUCTION

Bipolar disorder is a chronic and disabling mood disorder with a complex pathophysiological basis. A significant percentage of patients do not receive correct diagnosis which directly influences therapeutic response, rendering recovery troublesome. There is a long-standing need for proper non-clinically based tools for diagnosis, treatment selection and follow-up of such patients. Areas covered: In the past decade, the scientific community has shown a great interest in biomarker development. Here, we highlight the different potential biomarkers and we discuss their feasibility and their possible clinical relevance. Expert commentary: To date, despite the major ongoing trials and consortia with promising future perspectives, no reliable biomarker of bipolar disorder has been fully defined.