It has been suggested that substance use disorders could lead to accelerated biological aging, but only a few neuroimaging studies have investigated this hypothesis so far. In this cross-sectional study, structural neuroimaging was performed to measure cortical thickness (CT) in tricenarian adults with cocaine use disorder (CUD, n1 = 30) and their age-paired controls (YC, n1 = 30), and compare it with octogenarian elder controls (EC, n1 = 20). We found that CT in the right fusiform gyrus was similar between CUD and EC, thinner than the expected values of YC. We also found that regarding CT of the right inferior temporal gyrus, right inferior parietal cortex, and left superior parietal cortex, the CUD group exhibited parameters that fell in between EC and YC groups. Finally, CT of the right pars triangularis bordering with orbitofrontal gyrus, right superior temporal gyrus, and right precentral gyrus were reduced in CUD when contrasted with YC, but those areas were unrelated to CT of EC. Despite the 50-year age gap between our age groups, CT of tricenarian cocaine users assembles features of an octogenarian brain, reinforcing the accelerated aging hypothesis in CUD. In this cross-sectional study, tricenarian adults with cocaine use disorder in acute abstinence (CUD, n1 = 30), their age-paired controls (YC, n1 = 30), and octogenarian elder controls (EC, n1 = 16) performed a 3T structural neuroimaging scan to measure cortical thickness (CT) by surface-based analysis. In addition to the expected results related to age among tricenarians and octogenarians, interesting results were found and classified into three theoretical levels. In the first level (purple), we found that CT in the right fusiform gyrus was similar between CUD and EC, thinner than the expected values of YC. In the second level (yellow), we found that the CUD group exhibited parameters that fell between EC and YC groups in the right inferior temporal gyrus, right inferior parietal cortex, and the left superior parietal cortex. In the third level (brown), CT of the right superior temporal gyrus, right pars triangularis bordering on the orbitofrontal gyrus, and right precentral gyrus were reduced in CUD when contrasted with YC, but those areas were unrelated to CT of EC. Therefore, these results corroborate the accelerated aging hypothesis in CUD individuals.image

OBJECTIVE:The cingulate gyrus is implicated in the neurobiology of addiction, such as chronic cocaine consumption. Early life stress (ELS) is an important moderator of cocaine use disorder (CUD). Therefore, we investigated the effect of CUD on cingulate cortical thickness and tested whether a history of ELS could influence the effects of CUD. METHODS:Participants aged 18-50 years (78 with CUD due to crack cocaine consumption and 53 healthy controls) underwent magnetic resonance imaging and the cingulate thickness (rostral anterior, caudal anterior, posterior, and isthmus regions) was analysed. The clinical assessment comprised the Childhood Trauma Questionnaire (CTQ) and the Addiction Severity Index. Group comparisons adjusting by sex, age, and education were performed. Mediation models were generated where lifetime cocaine use, CTQ score, and cortical thickness corresponded to the independent variable, intermediary variable, and outcome, respectively. RESULTS:Group comparisons revealed significant differences in six out of eight cingulate cortices, showing lower thickness in the CUD group. Furthermore, years of regular cocaine use was the variable most associated with cingulate thickness. Negative correlations were found between CTQ scores and the isthmus cingulate (right hemisphere), as well as with the rostral anterior cingulate (left hemisphere). In the mediation analysis, we observed a significant negative direct effect of lifetime cocaine use on the isthmus cingulate and an indirect effect of cocaine use mediated by CTQ score. CONCLUSION:Our findings suggest that a history of ELS could aggravate the negative effects of chronic cocaine use on the cingulate gyrus, particularly in the right isthmus cingulate cortex.

Neste artigo, relata-se o caso de evolução atípica de uma paciente com diagnóstico de macroadenoma hipofisário e hemianopsia bilateral confirmada em exame de campimetria, com fundoscopia normal. A paciente evoluiu com melhora dos sintomas visuais, sem, no entanto, apresentar redução tumoral no exame de tomografia computadorizada. O macroadenoma possui a tendência de se expandir para cima devido ao elemento ósseo da sela túrcica que o limita. À medida em que cresce, começa a exercer efeito de massa sobre o limite inferior do quiasma óptico, causando assim a compressão mecânica das fibras do nervo óptico que passam ao centro do quiasma óptico. Esboçou-se, portanto, uma hipótese baseada em estudos com animais. Nestes estudos, a melhora dos sintomas mesmo com a compressão do quiasma óptico foi atribuída a um processo de remielinização nas fibras nervosas. Um dos mecanismos pelos quais a compressão pode causar dano às fibras nervosas é a desmielinização. A remielinização é um processo dependente de muitas variáveis, podendo ocorrer por meio da propagação de células precursoras de oligodendrócitos para renovar bainhas de mielina em axônios desmielinizados, permitindo o retorno do deslocamento do impulso nervoso.

There are significant sex differences in the clinical characteristics of cocaine use disorder (CUD). As this is a brain disorder that involves changes in functional connectivity, we investigated the existence of sex differences among people with CUD and controls. We used a data-driven method comparing males (n = 20, CK-M) and females with CUD (n = 20, CK-F) and healthy controls (20 males, HC-M and 20 females, HC-F). The participants undertook a resting-state functional magnetic resonance imaging exam. Regional homogeneity (ReHo) was performed to identify group and sex differences. Persons with CUD of both sexes presented lower ReHo parameters than controls, especially within the parietal lobule. Males with CUD showed higher ReHo than females in three right-side brain areas: postcentral gyrus, putamen and fusiform gyrus. It was found that abstinence symptoms severity was associated with lower ReHo values in the right postcentral gyrus and the right fusiform gyrus. Participants with CUD exhibited altered ReHo parameters compared to controls, similar to what is found in ageing-related disorders. Our data also indicate that cocaine has sex-specific effects on brain functioning when analysing ReHo.

Objective: describing a case of an infant exposed to cocaine through breast milk and its clinical repercussions. Case report: infant, one month and three days old, weighing 3,920g, came to the emergency room due to hypoactivity, sensory impairment and nose bleeding. Afebrile. irritated, tearful, no signs of ventilatory effort or active bleeding. Tests showed leukocytosis 13490/uL. mild metabolic acidosis. increased serum glutamic-oxaloacetic transaminase and enlarged coagulation tests. Other laboratory tests were normal. Toxicological screening revealed cocaine in the infant's plasma. Toxicological Information Center, recommended monitorization, and clinical support. The patient was discharged from the intensive care unit to the ward five days after admission, with sensorium improvement and a follow-up with specialized teams. Conclusions: prompt recognition of the neonatal abstinence syndrome allows for better management of it and high chances of recovery for patients. The differential diagnosis with septic condition can be of great importance in conditions like this one.

Objetivo: descrever o caso de um lactente exposto à cocaína e as repercussões clínicas da sua ingestão por meio do leite materno.Relato do caso: lactente, com um mês e três dias de vida e peso de 3.920g vem à emergência, por quadro de hipoatividade, rebaixamento de sensório, choro e sangramento nasal. Afebril, irritada, chorosa, sem sinais de esforço ventilatório ou sangramentos ativos. Exames mostraram leucocitose 13490/uL, acidose metabólica discreta, aumento de transglutaminase oxalacética e provas de coagulação alargadas. Demais exames laboratoriais sem alterações e culturas negativas. Screening toxicológico revelou cocaína no plasma da lactente. O Centro de Informações Toxicológicas, recomendou monitorização e suporte clínico. A paciente recebeu alta da unidade de terapia intensiva para enfermaria cinco dias após admissão, com melhora do sensório, seguindo acompanhamento com a equipes especializadas.Conclusão: o pronto reconhecimento da síndrome de abstinência neonatal permite o melhor manejo da mesma em benefício dos pacientes. O diagnóstico diferencial com quadro séptico pode ser de grande importância em quadros como este.

Previous diffusion-weighted imaging studies had been suggested white matter (WM) impairment among participants with cocaine addiction. Here we evaluated the potential neurotoxic effects of cocaine use in the WM of prefrontal cortex Brodmann area 9 (BA9) of patients with cocaine use disorder (CUD) and in healthy controls (HCs).

This work aims to investigate cortical thickness and cocaine addiction by comparing it between smoked cocaine users, their age-matched controls and a group of elderly participants.

White matter (WM) abnormalities in patients with cocaine use disorder (CUD) have been studied; however, the reported effects on the human brain are heterogenous and most results have been obtained from male participants. In addition, biological data supporting the imaging findings and revealing possible mechanisms underlying the neurotoxic effects of chronic cocaine use (CU) on WM are largely restricted to animal studies. To evaluate the neurotoxic effects of CU in the WM, we performed an in vivo diffusion tensor imaging assessment of male and female cocaine users ( n = 75) and healthy controls (HC) ( n = 58). Moreover, we performed an ex vivo large-scale proteomic analysis using liquid chromatography-tandem mass spectrometry in postmortem brains of patients with CUD ( n = 8) and HC ( n = 12). Compared with the HC, the CUD group showed significant reductions in global fractional anisotropy (FA) ( p < 0.001), and an increase in global mean (MD) and radial diffusion (RD) (both p < 0.001). The results revealed that FA, RD, and MD alterations in the CUD group were widespread along the major WM tracts, after analysis using the tract-based special statistics approach. Global FA was negatively associated with years of CU ( p = 0.0421) and female sex ( p < 0.001), but not with years of alcohol or nicotine use. Concerning the fibers connecting the left to the right prefrontal cortex, Brodmann area 9 (BA9), the CUD group presented lower FA ( p = 0.006) and higher RD ( p < 0.001) values compared with the HC group. A negative association between the duration of CU in life and FA values in this tract was also observed ( p = 0.019). Proteomics analyses in BA9 found 11 proteins differentially expressed between cocaine users and controls. Among these, were proteins related to myelination and neuroinflammation. In summary, we demonstrate convergent evidence from in vivo diffusion tensor imaging and ex vivo proteomics analysis of WM disruption in CUD.

Minor neurological symptoms such as anosmia are relatively common manifestations of coronavirus disease 2019 (COVID-19). However, severe affection of the central nervous system (CNS) occurs in a minority of cases and its treatment and pathophysiology is not yet well understood. It has been described that encephalitis due to COVID-19 may be caused by the proinflammatory state due to the cytokine storm or direct invasion of the virus in the CNS. Here we present a case of a 66-year-old man with bipolar disorder and moderate respiratory COVID-19 symptoms who presented to the emergency department with a decreased level of consciousness. Brain computerized tomography (CT) showed no acute pathology. A thorough investigation of other possible causes of CNS affection was negative. The patient was treated with pulse therapy with methylprednisolone and presented a significant improvement of his neurological condition, being discharged with a complete neurological recovery five days after the start of the treatment. This case illustrates the importance of a high index of suspicion in diagnosing severe CNS impairment in mild respiratory COVID-19 cases. Also, this case corroborates with previous reports of glucocorticoid response in CNS impairment associated with COVID-19, although more robust studies are required to confirm this relation.

Substantial white matter (WM) changes have been demonstrated in individuals with cocaine dependence using diffusion weighted imaging (DWI), a reliable method to asses white matter integrity. Despite clinical data evidencing worse outcomes in smoked cocaine users, the majority of WM data is based on male-only samples consuming intranasal cocaine. This study aims to investigate DWI differences in crack-cocaine users compared to a control group of both sex.

The SNP rs2251214 of the SYT1 gene was recently associated with externalizing phenotypes, including ADHD and cocaine use disorder (CUD). Here, we investigated whether SYT1 -rs2251214 could also be implicated with cognitive performance variations among women with CUD. Results showed that G homozygous ( n = 146) have lower cognitive performance in the Stroop, Trail Making and Matrix Reasoning tests compared with A-allele carriers ( n = 64), suggesting that rs2251214 may influence the severity of cognitive impairments in CUD.