Tabagismo na pandemia de Covid-19: aspectos neurobiológicos do abuso de drogas em condições de estresse prolongado / Smoking on Covid-19 pandemic: neurobiological aspects of drug abuse in lasting stress conditions / Fumar en la pandemia de Covid-19: aspectos neurobiológicos del abuso de drogas en condiciones de estrés duradero

No fim de 2019 iniciou-se uma das maiores crises da saúde pública global em Wuhan, China. Essa emergência foi o aparecimento do SARS-CoV-2 e da doença COVID-19, uma síndrome respiratória aguda de alta transmissibilidade. A declaração da pandemia pela OMS em março de 2020 fez com que o mundo tomasse diversas medidas para o combate e contenção da doença. Inicialmente o isolamento social e lockdown foram as principais iniciativas, já que não havia formas de tratamento ou prevenção da doença. Essas medidas restritivas geraram uma mudança de hábito da população que deflagrou sérios comprometimentos físicos e psicológicos. Uma das consequências foi o aumento do uso de substâncias de abuso e, consequentemente, do transtornos por uso de substâncias, dentre elas o tabaco. Durante a pandemia o consumo de cigarro aumentou de 10 a 30% no mundo, o tabagismo é a principal causa de morte evitável e fator de risco para diversas doenças. Conjuntamente ao álcool, a nicotina têm um poder aditivo superior a muitas drogas ilícitas. A combinação dos transtornos por uso de substâncias e a COVID-19 acabam por ter um efeito sinérgico, dessa forma, buscamos integrar aspectos neuroquímicos, cognitivos e comportamentais que levaram ao aumento do consumo e/ou recaída nicotina e a terapêutica utilizada.

One of the biggest global public health crisis began in Wuhan, China at the end of 2019. That emergency was the emergence of SARS-CoV-2 and the disease COVID-19, a highly transmissible acute respiratory syndrome. The pandemic declaration by the WHO in March 2020 caused the world to take on several measures to combat and contain the virus. Initially, social isolation and lockdown were the main initiatives, as there were no forms of treatment or prevention of the disease. These restrictive measures generate a change in the habit of the population that triggered serious physical and psychological impairments. One of the consequences was the increase in the use of substances of abuse and, consequently, substance use disorder, including tobacco. During the pandemic, cigarette consumption increased from 10 to 30% worldwide, whereas smoking is the main cause of preventable death and a risk factor for several diseases. Along with alcohol, nicotine has a greater addictive power than illicit drugs. Substance use disorders and COVID-19 have a synergistic effect, in this way, we seek to integrate neurochemical, cognitive and behavioral aspects that led to increased consumption and/or relapse in nicotine consumption and the used therapy.

Una de las mayores crisis mundiales de salud pública comenzó en Wuhan (China) a finales de 2019. Esa emergencia fue la aparición del SARS-CoV-2 y la enfermedad COVID-19, un síndrome respiratorio agudo altamente transmisible. La declaración de pandemia por parte de la OMS en marzo de 2020 hizo que el mundo adoptara varias medidas para combatir y contener el virus. Inicialmente, el aislamiento social y el encierro fueron las principales iniciativas, ya que no existían formas de tratamiento o prevención de la enfermedad. Estas medidas restrictivas generaron un cambio en los hábitos de la población que desencadenó graves alteraciones físicas y psicológicas. Una de las consecuencias fue el aumento del consumo de sustancias de abuso y, en consecuencia, el trastorno por consumo de sustancias, incluido el tabaco. Durante la pandemia, el consumo de cigarrillos aumentó del 10 al 30% en todo el mundo, mientras que el tabaquismo es la principal causa de muerte evitable y un factor de riesgo de varias enfermedades. Junto con el alcohol, la nicotina tiene un mayor poder adictivo que las drogas ilícitas. Los trastornos por uso de sustancias y la COVID-19 tienen un efecto sinérgico, de esta manera, buscamos integrar los aspectos neuroquímicos, cognitivos y conductuales que llevaron al aumento del consumo y/o recaída en el consumo de nicotina y la terapia utilizada.

A Systematic Review on Effectiveness of Nicotine-Based and NonNicotine Based Drug Delivery System for Smoking Cessation Among the Elderly

@#Introduction: Smoking is associated with a higher risk of mortality, especially in smokers with cardiovascular and respiratory diseases. Smoking cessation remains the most effective approach in reducing smoking-related illness risks at all ages. For elderly smokers, smoking cessation has been proved to prolong life expectancy and reduce the risk of stroke and ischemic heart disease. However, a wide selection of smoking cessation medications makes prescribing challenging, especially among elderly smokers. Inability to recommend the best treatment may reduce the smoking cessation success rate in the elderly. Therefore, this study compares the effectiveness of pharmacotherapy available and correlate the effect of ageing on the effectiveness, leading to the recommendation of the best medication for elderly smokers. Method: A systematic searching strategy was performed in three different databases by using predetermined search strings. Results: Overall, this systematic review revealed that varenicline showed the greatest smoking cessation rate among the elderly, followed by bupropion and NRT. Conclusion: It is suggested that varenicline offered the best medical aid for smoking cessation in the elderly.

Nicotine smoking is associated with impaired cognitive performance in Pakistani young people.

Nicotine smoking is the most common mode of tobacco smoking among young people. It affects the areas of the brain associated with memory, attention, and learning. This study has investigated the effect of nicotine smoking on cognitive performance. One hundred male volunteers (50 nicotine smokers and 50 nonsmokers) aged 18-30 years with similar socioeconomic backgrounds were recruited for this study. Clinical history of participants was obtained using a questionnaire. Their brain health and handedness were determined using the Mini Mental State Examination (MMSE) and the Edinburgh Handedness Inventory (EHI), respectively. The dependent variables examined in the study were attention-switching tasks (AST), pattern recognition memory (PRM), and choice reaction time (CRT). These parameters were assessed using the Cambridge Neuropsychological Automated Battery (CANTAB). The average ages of participating smokers and nonsmokers were 24.02 ± 3.41 years (mean ± standard deviation) and 22.68 ± 1.87 years, respectively. MMSE and EHI scores of smokers were 28.42 ± 1.09 and 99.75 ± 1.77, respectively; for nonsmokers, these scores were 28.54 ± 1.34 and 98 ± 1.91, respectively. The mean score for AST correct latency/delay was significantly higher (p = 0.050) in smokers (620.26 ± 142.03) than in nonsmokers (570.11 ± 108.39). The percentage of correct AST trials was significantly higher (p = 0.000) in nonsmokers (96.95 ± 2.18) than in smokers (83.75 ± 11.22). The PRM percent correct were significantly higher (p = 0.000) of nonsmokers (93.42 ± 8.34) than of smokers (79.75 ± 13.44). The mean correct latency for CRT was significantly higher (p = 0.009) in smokers (509.87 ± 129.83) than in nonsmokers (455.20 ± 65.73). From this data, it can be concluded that nicotine smoking is linked with impaired cognitive functions in smokers.

Cholinergic control of bone development and beyond.

There is ample evidence that cholinergic actions affect the health status of bones in vertebrates including man. Nicotine smoking, but also exposure to pesticides or medical drugs point to the significance of cholinergic effects on bone status, as reviewed here in Introduction. Then, we outline processes of endochondral ossification, and review respective cholinergic actions. In Results, we briefly summarize our in vivo and in vitro studies on bone development of chick and mouse [1,2], including (i) expressions of cholinergic components (AChE, BChE, ChAT) in chick embryo, (ii) characterisation of defects during skeletogenesis in prenatal ChE knockout mice, (iii) loss-of-function experiments with beads soaked in cholinergic components and implanted into chicken limb buds, and finally (iv) we use an in vitro mesenchymal 3D-micromass model that mimics cartilage and bone formation, which also had revealed complex crosstalks between cholinergic, radiation and inflammatory mechanisms [3]. In Discussion, we evaluate non-cholinergic actions of cholinesterases during bone formation by considering: (i) how cholinesterases could function in adhesive mechanisms; (ii) whether and how cholinesterases can form bone-regulatory complexes with alkaline phosphatase (ALP) and/or ECM components, which could regulate cell division, migration and adhesion. We conclude that cholinergic actions in bone development are driven mainly by classic cholinergic, but non-neural cycles (e.g., by acetylcholine); in addition, both cholinesterases can exert distinct ACh-independent roles. Considering their tremendous medical impact, these results bring forward novel research directions that deserve to be pursued.

Demographic, sampling- and assay-related confounders of endogenous oxytocin concentrations: A systematic review and meta-analysis.

Studies on endogenous oxytocin concentrations are often criticized for the debatable comparability between specimens and the variation in reported values. We performed meta-regressions on k = 229 studies (n = 12 741 participants), testing whether specimen, extraction, sex, age, time of day, or fasting instructions influenced oxytocin measurements. Predicted oxytocin concentrations differed depending on specimen and extraction: Measurements were extremely high in unextracted blood, compared to extracted blood and other specimens. Measurements were higher in samples with more female participants and higher age. Instructions not to smoke before sampling were correlated with higher oxytocin in unextracted samples. There was no impact of instructions to refrain from eating, drinking, consume caffeine, alcohol or exercising. Oxytocin concentrations increased from morning to afternoon. Our results showed that oxytocin is differentially reflected in blood, saliva, urine and cerebrospinal fluid. Extraction impacts oxytocin measurements, particularly in blood. Considering relevant confounders might increase comparability between studies.

Human Genetics of Addiction: New Insights and Future Directions.

PURPOSE OF REVIEW: With the advent of the genome-wide association study (GWAS), our understanding of the genetics of addiction has made significant strides forward. Here, we summarize genetic loci containing variants identified at genome-wide statistical significance (P < 5 × 10-8) and independently replicated, review evidence of functional or regulatory effects for GWAS-identified variants, and outline multi-omics approaches to enhance discovery and characterize addiction loci. RECENT FINDINGS: Replicable GWAS findings span 11 genetic loci for smoking, eight loci for alcohol, and two loci for illicit drugs combined and include missense functional variants and noncoding variants with regulatory effects in human brain tissues traditionally viewed as addiction-relevant (e.g., prefrontal cortex [PFC]) and, more recently, tissues often overlooked (e.g., cerebellum). GWAS analyses have discovered several novel, replicable variants contributing to addiction. Using larger sample sizes from harmonized datasets and new approaches to integrate GWAS with multiple 'omics data across human brain tissues holds great promise to significantly advance our understanding of the biology underlying addiction.

Prevalência de discentes fumantes, estudo da dependência da nicotina / Prevalence smokers students, a study to nicotine dependence

Introdução: A OMS considera o tabagismo a principal causa de morte evitável. Atualmente, a conscientização dos malefícios causados pelo tabagismo é considerado o melhor tratamento.Objetivo: Avaliar a prevalência de fumantes, analisar o nível de dependência da nicotina em graduandos dos cursos de Enfermagem, Fisioterapia e Nutrição da Universidade Nove de Julho. Métodos: Os dados analisados provem de amostras coletadas, após a aplicação de um questionário com 8 perguntas sobre o tabagismo em discentes da área da saúde da Universidade Nove de Julho. Os discentes fumantes foram submetidos ao Teste de Fagerstrom para avaliar e ter o conhecimento do seu real nível de dependência da nicotina. Resultados: Os dados foram compostos por 1807 (89%) não fumantes, 218 (10,75%) fumantes e 5 (0,25%) ex-fumantes. Conclusão: Concluiu-se que o tabagismo representa um grave problema de saúde pública que atinge os profissionais em formação na área da saúde.

Introduction: The WHO considers smoking the leading cause of preventable death. Currently, the awareness of the harm caused by smoking is considered the best treatment. Objective: To evaluate the prevalence of smoking among students, examining the level of nicotine dependence. Methods: Data analyzed were from samples collected after administration of a questionnaire with eight questions on smoking in health care students at the University Nove. The students were smokers submitted to the Fagerstrom Test for assessing and have knowledge of their actual level of nicotine dependence. Results: After an analysis of cross-sectional study were obtained from 218 smokers and 157 women and 61 men who underwent the FTND. It was observed that dependency levels varied, with the following results: 68.35% mild, moderate 25.23% and 3.21% severe. Conclusion: We conclude that smoking is a serious public health problem affecting the professional training in health.

Imaging of Dopamine Release Induced by Pharmacologic and Nonpharmacologic Stimulations / 핵의학분자영상

Technological advances in molecular imaging made it possible to image synaptic neurotransmitter concentration in living human brain. The dopaminergic system has been most intensively studied because of its importance in neurological as well as psychiatric disorders. This paper provides a brief overview of recent progress in imaging studies of dopamine release induced by pharmacologic and nonpharmacologic stimulations.