An Expanded Narrative Review of Neurotransmitters on Alzheimer's Disease: The Role of Therapeutic Interventions on Neurotransmission.

Alzheimer's disease (AD) is a progressive neurodegenerative disease. The accumulation of amyloid-ß (Aß) plaques and tau neurofibrillary tangles are the key players responsible for the pathogenesis of the disease. The accumulation of Aß plaques and tau affect the balance in chemical neurotransmitters in the brain. Thus, the current review examined the role of neurotransmitters in the pathogenesis of Alzheimer's disease and discusses the alterations in the neurochemical activity and cross talk with their receptors and transporters. In the presence of Aß plaques and neurofibrillary tangles, changes may occur in the expression of neuronal receptors which in turn triggers excessive release of glutamate into the synaptic cleft contributing to cell death and neuronal damage. The GABAergic system may also be affected by AD pathology in a similar way. In addition, decreased receptors in the cholinergic system and dysfunction in the dopamine neurotransmission of AD pathology may also contribute to the damage to cognitive function. Moreover, the presence of deficiencies in noradrenergic neurons within the locus coeruleus in AD suggests that noradrenergic stimulation could be useful in addressing its pathophysiology. The regulation of melatonin, known for its effectiveness in enhancing cognitive function and preventing Aß accumulation, along with the involvement of the serotonergic system and histaminergic system in cognition and memory, becomes remarkable for promoting neurotransmission in AD. Additionally, nitric oxide and adenosine-based therapeutic approaches play a protective role in AD by preventing neuroinflammation. Overall, neurotransmitter-based therapeutic strategies emerge as pivotal for addressing neurotransmitter homeostasis and neurotransmission in the context of AD. This review discussed the potential for neurotransmitter-based drugs to be effective in slowing and correcting the neurodegenerative processes in AD by targeting the neurochemical imbalance in the brain. Therefore, neurotransmitter-based drugs could serve as a future therapeutic strategy to tackle AD.

Composition characterization and biological activity study of Achillea vermicularis extract and extract-loaded nanoparticles.

Antiproliferative activity of Achillea vermicularis extracts was calculated on glial (C6) and keratinocyte (HaCaT) cell lines using XTT assay. It was observed that all extracts of A. vermicularis at the determined concentration were not cytotoxic in HaCaT cell lines. The nanoparticles (NPs) of the extract with the best cytotoxic activity was prepared, and necessary characterization studies were performed. Results showed that NP containing the extract has a lower IC50 value and more cytotoxic activity in C6 cells compared to the only extract. Furthermore, the antiepileptic potentials of these substances were explored in this study. The effect of A. vermicularis extracts on the enzyme activities of carbonic anhydrase I and II isoenzymes (hCA I and hCA II) was measured using spectrophotometry to achieve this goal. A. vermicularis extracts demonstrated high inhibitory activities compared to standard inhibitor (acetazolamide, AAZ), with IC50 values in the range of 5.04-10.8 µg/ml for hCA I, and 5.40-9.22 µg/ml for hCA II. High-performance liquid chromatography diode array detector (HPLC-DAD) was used in this investigation to assess the main chemicals found in the extract and NPs. The results showed that the ethanol extract (157.636 µg/mg extract) and NPs (4.631 µg/mg extract) had a significant amount of the 8-hydroxy salvigenin component.

Family-based prevention in youth's substance misuse in low- and middle-income countries: A review from Turkey and cultural adaptation of family based interventions.

Family-based interventions have been recognized and practised more in high-income countries than in low- and middle-income countries. However, the threats posed by substance misuse to the youth do not change for the latter. The development of appropriate preventive programs is an area of interest for addiction prevention in low- and middle-income countries by recognizing the risk factors for substance misuse among young individuals. This study aims to present the risk factors primarily in family-based conditions for substance use among young people in low- and middle-income countries and to provide information on family-based interventions that can be developed in line with these factors. It is aimed to discuss how family-based studies can be adapted to samples such as Turkey in the light of three programs originating in the USA. Fifty-six publications gathered from the literature between 1989-2021 by using keywords were included in the study. Adolescence and young adulthood are the riskiest developmental periods for substance misuse worldwide. Economic, cultural and family-based factors involving the youth are of considerable importance. Families' consciousness of youth's substance use is worthful to prevent youth's addictions in the future. Studies show that family-based preventions are promising interventions in this regard.

Rates and correlates of employment in patients with schizophrenia: A multicenter study in Turkey.

BACKGROUND: There is not enough information regarding the participation in the working life of the patients with schizophrenia in Turkey. AIMS: The aim of this study was to examine the occupational experiences of patients with schizophrenia before and after the illness and to investigate the factors that predict work participation. METHODS: The data on occupational life of the patients with schizophrenia, which were treated as outpatients in six different centers, were examined. The rates of participation in working life before and after the disease were evaluated. Patients with and without occupational life history after the disease were compared in terms of demographic characteristics. Factors predicting participation in work life after the disease were analyzed by logistic regression analysis. RESULTS: Out of the 587 patients evaluated in the study, 73% were males, 73% were single, the mean age was 42, mean level of education was 9 years and the average duration of illness was 18 years. The duration of the employment before the disease was higher than that after the disease regarding expected working time. The rate of employment was 11% currently, 14% in the last year, 62% after the disease and 83% for the lifetime. While the factors that predicted to be in working life after the illness were male gender (odds ratio (OR) = 2.9), diagnosis of schizoaffective disorder (OR = 2.6), high level of education (OR = 1.2) and employment history before the onset of the illness (OR = 1.0), only the shorter duration of illness (OR = 1.1) predicted the current working status when the gender variable was excluded. CONCLUSION: Rate of employment of patients with schizophrenia living in Turkey was low as in other countries. Good premorbid functioning seems to determine participation in occupational life after the illness.