Khat and neurobehavioral functions: A systematic review

Changes in Glial Fibrillary Acidic Protein-Immunoreactive Astrocytes in the Prefrontal Cortex of the Male Rat following Chronic Khat Use

Background

Long-term khat consumption is associated with significant neurocognitive changes, which have been elucidated in behavioral studies. With current research showing the centrality of astrocytes and other glial cells in neuronal signaling, there is possibility that these cells are also affected by chronic khat use. There is little literature on the structural changes in the prefrontal cortex neuronal and astrocytic cytoarchitecture and morphometry in chronic khat users.

Objective

The objective of this study was to describe the changes in astrocyte morphometry and structure in rats after long-term use of khat (miraa).

Materials and Methods

Adult male Wistar rats, aged 2-3 months, weighing 200-300 g were randomized into four groups of 10 each (control, Group 1, Group 2, and Group 3) to correspond with those used as controls and those that received 500 mg/kg, 1000 mg/kg, and 2000 mg/kg body weight khat extracts, respectively. Fresh khat leaves were purchased from Maua market in Meru, and crude extract was prepared using lyophilization. The control rats were fed on normal diet, while the experimental groups were fed on normal diet and khat extracts using oral gavage for 6 weeks. The animals were sacrificed and their brains were removed. We performed immunohistochemical visualization of astrocytes using glial fibrillary acidic protein. Photomicrographs of the stained sections were transferred to ImageJ Fiji software to study the astrocyte density and astrocytic processes. We used Kruskal-Wallis test to correlate the four animal groups in terms of astrocyte densities.

Results

We observed an increase in the average number of astrocytes with increasing doses of khat compared to controls, with those in Group 3 (2000 mg/kg) having an exuberant reactive astrocytosis. Further, escalating khat doses resulted in increased glial fibrillary acidic protein immunoreactivity in the nuclei and astrocytic processes, gliotic changes, and increased complexity of astrocytic processes.

Conclusion

Chronic khat use, especially at high doses, results in reactive astrocytosis and astrogliosis, which may be part of the mechanisms involved in the cognitive changes associated with its use.

Spatial variation of premarital HIV testing and its associated factors among married women in Ethiopia: Multilevel and spatial analysis using 2016 demographic and health survey data

BACKGROUND

Africa is the most severely affected area, accounting for more than two-thirds of the people living with HIV. In sub-Saharan Africa, more than 85% of new HIV-infected adolescents and 63% of all new HIV infections are accounted for by women. Ethiopia has achieved a 50% incidence rate reduction. However, mortality rate reduction is slow, as the estimated prevalence in 2021 is 0.8%. In sub-Saharan Africa, heterosexual transmission accounts for the majority of HIV infections, and women account for 58% of people living with HIV. Most of these transmissions took place during marriage. Thus, this study aimed to explore the spatial variation of premarital HIV testing across regions of Ethiopia and identify associated factors.

METHODS

A cross-sectional study design was employed. A total of 10223 weighted samples were taken from individual datasets of the 2016 Ethiopian Demographic and Health Survey. STATA version 14 and ArcGIS version 10.8 software's were used for analysis. A multilevel mixed-effect generalized linear model was fitted, and an adjusted prevalence Ratio with a 95% CI and p-value < 0.05 was used to declare significantly associated factors. Multilevel models were compared using information criteria and log-likelihood. Descriptive and spatial regression analyses (geographical weighted regression and ordinary least squares analysis) were conducted. Models were compared using AICc and adjusted R-squared. The local coefficients of spatial explanatory variables were mapped.

RESULTS

In spatial regression analysis, secondary and above education level, richer and above wealth quintile, household media exposure, big problem of distance to health facility, having high risky sexual behaviour and knowing the place of HIV testing were significant explanatory variables for spatial variation of premarital HIV testing among married women. While in the multilevel analysis, age, education level, religion, household media exposure, wealth index, khat chewing, previous history of HIV testing,age at first sex, HIV related knowledge, HIV related stigma, distance to health facility, and community level media exposure were associated with premarital HIV testing among married women.

CONCLUSIONS AND RECOMMENDATION

Premarital HIV testing had a significant spatial variation across regions of Ethiopia. A statistically significant clustering of premarital HIV testing was observed at Addis Ababa, Dire Dawa, North Tigray and some parts of Afar and Amhara regions. Therefore area based prevention and interventional strategies are required at cold spot areas to halt the role of heterosexual transmission in HIV burden. Moreover, the considering the spatial explanatory variables effect in implementations of these strategies rather than random provision of service would make regional health care delivery systems more cost-effective.

Perceived harms and protective behavioural strategies among khat chewers: a qualitative study in Jimma, Ethiopia

BACKGROUND

While there have been many previous studies focusing on the adverse effects of khat chewing, attempts to investigate the protective behavioural strategies (PBS) employed by the khat using population are rare. PBS are strategies that substance users employ to minimize or alleviate the possible negative consequences related to the behaviour. This study focuses on the harms that chewers associate with khat use, and the behavioural strategies they practise to prevent or minimize these harms.

METHODS

A community-based qualitative study was conducted using a snowball sampling technique to recruit a diverse sample of khat chewing participants (N = 102) in Jimma city, Ethiopia. Face-to-face in-depth interviews were carried out with the participants.

RESULTS

Participants identified a variety of harms likely to result from chewing khat. These include impacts on their finances, work, social life and health. The PBS that participants employed to avoid or minimize the risks were classified into four themes based on their temporal sequence with khat chewing sessions: prior to chewing, during chewing, after chewing and general PBS covering the whole of their khat chewing career. The PBS enable khat chewers to prevent or minimize the adverse health consequences of chewing, socialize and work without or with fewer difficulties and manage their economy successfully.

CONCLUSION

The study participants believe that khat-related harms are avoidable if khat users implement appropriate strategies prior to, during and after chewing, and if they apply PBS to khat-related factors (e.g. type, amount and frequency), set factors (e.g. reason for using and health behaviour) and setting factors (e.g. place of use, when used, with whom used and social norms) covering the whole of their khat chewing career.

Magnitude, relationship and determinants of attention deficit hyperactivity disorder and depression among University of Gondar undergraduate students, Northwest Ethiopia, 2022: Non-recursive structural equation modeling

BACKGROUND

Up to 80% of adults with attention deficit hyperactivity disorder (ADHD) may have a concomitant psychiatric disorder. ADHD and depression, combined with the demands of University life, can pose serious challenges for students. However, there are limited studies conducted on this topic in our country. Therefore, the current study assessed the magnitude, relationship, and determinants of ADHD and depressive symptoms among students at the University of Gondar.

METHOD

An institution-based cross-sectional study was employed among 1514 undergraduate students at the University of Gondar from June 1-20, 2022. A stratified, simple random sampling technique was applied. Structural equation modeling was employed. The degree of relationship was interpreted based on the adjusted regression coefficient with 95% confidence interval (CI) and p-value (<0.05).

RESULT

In our study, 37.6% [CI: 35.2-40.1%] and 20.01% [CI: 18.1-22.1%] of the participants had depressive and ADHD symptoms, respectively. Chronic illness [β = 0.19, CI; 0.09, 0.30], alcohol use [β = 0.10, CI; 0.03, 0.17], social support [β = -0.23, CI; -0.29, -0.17], problematic internet use (PIU) [β = 0.23, CI; 0.18, 0.27], and insomnia [β = 0.24, CI; 0.17, 0.30] had a direct relationship with depressive symptoms. Mother education level [β = -0.09, CI; -0.13, -0.06], birth order [β = -0.09, CI; -0.11, -0.07], chat chewing [β = 0.18, CI; 0.06, 0.30], and depressive symptoms [β = 0.73, CI; 0.62, 0.86] had a direct relationship with ADHD. Chronic illness [β = 0.14, CI; 0.06, 0.22], PIU [β = 0.16, CI; 0.13, 0.21], social support [β = -0.16, CI; -0.22, -0.12], and insomnia [β = 0.17, CI; 0.13, 0.23] had an indirect effect on ADHD.

CONCLUSION AND RECOMMENDATION

The prevalence of ADHD and depressive symptoms was high. Chronic disease, alcohol use, social support, PIU, and insomnia had a direct effect on depressive symptoms and an indirect effect on ADHD. Mother education, birth order, chat chewing, and depressive symptoms had a direct effect on ADHD. Our study provided useful clues for clinical treatment and school-based interventions that aim to improve college students' mental well-being. It is better to design school-based intervention and prevention programs to achieve timely diagnosis and treatment of these disorders among university students.