Melatonin improves nitric oxide bioavailability in isoproterenol induced myocardial injury.

Isoproterenol administration is associated with cardiac inflammation and decreased NO availability. Melatonin has been reported to have cardioprotective effect. The aim of this study was to investigate the effect of melatonin on NO bioavailability and inflammation in myocardial injury induced by isoproterenol. Isoproterenol was administrated in male Wistar rats for 7 days to induce cardiac injury. The animals were divided into 3 groups: Control, Isoproterenol, Isoproterenol + Melatonin. Animals received melatonin for 7 days. Echocardiographic analysis was performed and the hearts were collected for molecular analysis. Animals that received isoproterenol demonstrated a reduction in left ventricle systolic and diastolic diameter, indicating the presence of concentric hypertrophy. Melatonin was able to attenuate this alteration. Melatonin also improved NO bioavailability and decreased NF-κß, TNFα and IL-1ß expression. In conclusion, melatonin exhibited a cardioprotective effect which was associated with improving NO bioavailability and decreasing the pro-inflammatory proteins.

Mapping the lipidome in mitochondria-associated membranes (MAMs) in an in vitro model of Alzheimer's disease.

The disruption of mitochondria-associated endoplasmic reticulum (ER) membranes (MAMs) plays a relevant role in Alzheimer's disease (AD). MAMs have been implicated in neuronal dysfunction and death since it is associated with impairment of functions regulated in this subcellular domain, including lipid synthesis and trafficking, mitochondria dysfunction, ER stress-induced unfolded protein response (UPR), apoptosis, and inflammation. Since MAMs play an important role in lipid metabolism, in this study we characterized and investigated the lipidome alterations at MAMs in comparison with other subcellular fractions, namely microsomes and mitochondria, using an in vitro model of AD, namely the mouse neuroblastoma cell line (N2A) over-expressing the APP familial Swedish mutation (APPswe) and the respective control (WT) cells. Phospholipids (PLs) and fatty acids (FAs) were isolated from the different subcellular fractions and analyzed by HILIC-LC-MS/MS and GC-MS, respectively. In this in vitro AD model, we observed a down-regulation in relative abundance of some phosphatidylcholine (PC), lysophosphatidylcholine (LPC), and lysophosphatidylethanolamine (LPE) species with PUFA and few PC with saturated and long-chain FA. We also found an up-regulation of CL, and antioxidant alkyl acyl PL. Moreover, multivariate analysis indicated that each organelle has a specific lipid profile adaptation in N2A APPswe cells. In the FAs profile, we found an up-regulation of C16:0 in all subcellular fractions, a decrease of C18:0 levels in total fraction (TF) and microsomes fraction, and a down-regulation of 9-C18:1 was also found in mitochondria fraction in the AD model. Together, these results suggest that the over-expression of the familial APP Swedish mutation affects lipid homeostasis in MAMs and other subcellular fractions and supports the important role of lipids in AD physiopathology.

Enhancing phosphorus removal of photogranules by incorporating polyphosphate accumulating organisms.

Photogranules are a novel wastewater treatment technology that can utilize the sun's energy to treat water with lower energy input and have great potential for nutrient recovery applications. They have been proven to efficiently remove nitrogen and carbon but show lower conversion rates for phosphorus compared to established treatment systems, such as aerobic granular sludge. In this study, we successfully introduced polyphosphate accumulating organisms (PAOs) to an established photogranular culture. We operated photobioreactors in sequencing batch mode with six cycles per day and alternating anaerobic (dark) and aerobic (light) phases. We were able to increase phosphorus removal/recovery by 6 times from 5.4 to 30 mg/L/d while maintaining similar nitrogen and carbon removal compared to photogranules without PAOs. To maintain PAOs activity, alternating anaerobic feast and aerobic famine conditions were required. In future applications, where aerobic conditions are dependent on in-situ oxygenation via photosynthesis, the process will rely on sunlight availability. Therefore, we investigated the feasibility of the process under diurnal cycles with a 12-h anaerobic phase during nighttime and six short cycles during the 12 h daytime. The 12-h anaerobic phase had no adverse effect on the PAOs and phototrophs. Due to the extension of one anaerobic phase to 12 h the six aerobic phases were shortened by 47% and consequently decreased the light hours per day. This resulted in a decrease of phototrophs, which reduced nitrogen removal and biomass productivity up to 30%. Finally, we discuss and suggest strategies to apply PAO-enriched photogranules at large-scale.

The relation between atopic dermatitis and depressive symptoms / A relação entre dermatite atópica e sintomas depressivos

Introdução: O quadro da dermatite atópica (DA) é caracterizado por prurido crônico de evolução flutuante, que pode resultar em distúrbios no padrão de sono e em estigmatização social devido à presença de lesões visíveis e recidivantes, as quais tendem a se tornar progressivamente liquenificadas. Fatores como os já citados e outros associados, como incapacidade laboral, falta de concentração ao longo do dia e isolamento apresentam-se como profundos impactantes para a saúde mental do paciente, podendo resultar em baixa autoestima, depressão e frustração. Além disso, sabe-se que a DA é uma doença essencialmente inflamatória, ao mesmo tempo em que estudos recentes demonstram papel de citocinas no desenvolvimento de síndromes depressivas, podendo haver correlação causal entre os quadros por vias inflamatórias. Objetivos: Essa revisão sistemática de literatura objetivou analisar a relação entre dermatite atópica e sintomas depressivos, identificando possíveis mecanismos responsáveis por essa ligação. Métodos: A busca foi feita entre 17/11/2020 e 18/11/2020 seguindo o modelo PRISMA e utilizando as bases PUBMED, Biblioteca Virtual em Saúde (BVS) - IBECS, LILACS e CUMED - e EMBASE. As palavras-chave "Depression" e "Atopic Eczema", em conjunto com seus termos MeSh e DECS, foram utilizadas e associadas através do método booleano. Critérios para inclusão foram definidos como artigos que são ensaios clínicos ou observacionais envolvendo grupo de pacientes com dermatite atópica e grupo controle, que pôde ser constituído pelo próprio grupo com dermatite atópica, porém, após intervenção. Os sintomas depressivos precisavam ser medidos por escalas ou terem critérios para diagnóstico de síndrome depressiva estabelecidos. A seleção foi feita por todos os autores de forma independente, sendo discordâncias solucionadas por consenso. Resultados: Ao final, quinze estudos restaram, os quais foram classificados entre aqueles que comparam tratamentos e seus desfechos relacionados à depressão e DA, aqueles que propõem DA como agravante de sintomas depressivos, aqueles que propõem sintomas depressivos como agravantes da DA e aqueles que trazem análises estatísticas sem estabelecer claramente onde reside a relação de causalidade entre os dois quadros. Conclusões: Diversos estudos mostraram a existência de relação entre o quadro de DA e sintomas depressivos em vias distintas, tanto analisando a DA como agravante de sintomas depressivos como vice-versa. A partir dessa perspectiva, é possível que haja uma causalidade bidirecional cíclica, na qual um constante feedback positivo gera piora de ambos os quadros até que a abordagem adequada seja tomada, evidenciando a importância da propedêutica multidisciplinar para esses pacientes (AU)

Introduction: Atopic dermatitis (AD) is characterized by chronic itching, presenting with fluctuating evolution, resulting in sleep disorders and social stigmatization due to the presence of visible and recurrent lesions, that might become progressively lichenified. Factors such as those mentioned and others associated, such as incapacity for work, lack of concentration throughout the day and isolation have profound impacts on the patient's mental health, resulting in low self-esteem, depression and frustration. In addition, it is known that AD is essentially an inflammatory disease. And, recent studies demonstrate the role of inflammatory cytokines in the development of depressive syndromes, therefore may be a causal correlation between the conditions by inflammatory pathways. Objectives: This systematic literature review aimed to analyze a relationship between atopic dermatitis and depressive symptoms, identifying mechanisms responsible for this connection. Methods: The research was carried out between 11/17/2020 and 11/18/2020 following the PRISMA model and using PUBMED, Virtual Health Library (VHL) - IBECS, LILACS and CUMED - and EMBASE databases. Keywords "Depression" and "Atopic Eczema", along with its MeSh and DECS terms, were used and associated using the Boolean method. Inclusion criteria were defined as articles that are clinical or observational trials involving a group of patients with atopic dermatitis and a control group, which could be constituted by the group with atopic dermatitis itself, however, after an intervention. The depressive symptoms had to be measured by scales or, at least, the criteria for diagnosis of depressed syndrome must have been established. Results:In the end, fifteen studies remained, which were classified among those that compare treatments and their outcomes related to depression and AD, those that propose AD as an aggravator of depressive symptoms, those that propose depressive symptoms as an aggravating factor for AD and those that bring statistical analysis without clearly establishing where the causality relation resides. Conclusion: Several studies have presented a relationship between the condition of AD and depressive symptoms in distinct pathways, or analyzing AD as an aggravating factor for depressive symptoms or vice-versa. From this perspective, there may be a cyclical bidirectional causality, in which constant positive feedback generates worsening of both conditions until the adequate approach is taken, highlighting the importance of the multidisciplinary propaedeutics for these patients (AU)

Localisation of phosphoinositides in the grass endophyte Epichloë festucae and genetic and functional analysis of key components of their biosynthetic pathway in E. festucae symbiosis and Fusarium oxysporum pathogenesis.

Phosphoinositides (PI) are essential components of eukaryotic membranes and function in a large number of signaling processes. While lipid second messengers are well studied in mammals and yeast, their role in filamentous fungi is poorly understood. We used fluorescent PI-binding molecular probes to localize the phosphorylated phosphatidylinositol species PI[3]P, PI[3,5]P2, PI[4]P and PI[4,5]P2 in hyphae of the endophyte Epichloë festucae in axenic culture and during interaction with its grass host Lolium perenne. We also analysed the roles of the phosphatidylinositol-4-phosphate 5-kinase MssD and the predicted phosphatidylinositol-3,4,5-triphosphate 3-phosphatase TepA, a homolog of the mammalian tumour suppressor protein PTEN. Deletion of tepA in E. festucae and in the root-infecting tomato pathogen Fusarium oxysporum had no impact on growth in culture or the host interaction phenotype. However, this mutation did enable the detection of PI[3,4,5]P3 in septa and mycelium of E. festucae and showed that TepA is required for chemotropism in F. oxysporum. The identification of PI[3,4,5]P3 in ΔtepA strains suggests that filamentous fungi are able to generate PI[3,4,5]P3 and that fungal PTEN homologs are functional lipid phosphatases. The F. oxysporum chemotropism defect suggests a conserved role of PTEN homologs in chemotaxis across protists, fungi and mammals.

A relação entre dermatite atópica e sintomas depressivos / The relation between atopic dermatitis and depressive symptoms

RESUMO: Introdução: O quadro da dermatite atópica (DA) é caracterizado por prurido crônico de evolução flutuante, que pode resultar em distúrbios no padrão de sono e em estigmatização social devido à presença de lesões visíveis e recidivantes, as quais tendem a se tornar progressivamente liquenificadas. Fatores como os já citados e outros associados, como incapacidade laboral, falta de concentração ao longo do dia e isolamento apresentam-se como profundos impactantes para a saúde mental do paciente, podendo resultar em baixa autoestima, depressão e frustração. Além disso, sabe-se que a DA é uma doença essencialmente inflamatória, ao mesmo tempo em que estudos recentes demonstram papel de citocinas no desenvolvimento de síndromes depressivas, podendo haver correlação causal entre os quadros por vias inflamatórias. Objetivos: Essa revisão sistemática de literatura objetivou analisar a relação entre dermatite atópica e sintomas depressivos, identificando possíveis mecanismos responsáveis por essa ligação. Métodos: A busca foi feita entre 17/11/2020 e 18/11/2020 seguindo o modelo PRISMA e utilizando as bases PUBMED, Biblioteca Virtual em Saúde (BVS) - IBECS, LILACS e CUMED - e EMBASE. As palavras-chave "Depression" e "Atopic Eczema", em conjunto com seus termos MeSh e DECS, foram utilizadas e associadas através do método booleano. Critérios para inclusão foram definidos como artigos que são ensaios clínicos ou observacionais envolvendo grupo de pacientes com dermatite atópica e grupo controle, que pôde ser constituído pelo próprio grupo com dermatite atópica, porém, após intervenção. Os sintomas depressivos precisavam ser medidos por escalas ou terem critérios para diagnóstico de síndrome depressiva estabelecidos. A seleção foi feita por todos os autores de forma independente, sendo discordâncias solucionadas por consenso. Resultados: Ao final, quinze estudos restaram, os quais foram classificados entre aqueles que comparam tratamentos e seus desfechos relacionados à depressão e DA, aqueles que propõem DA como agravante de sintomas depressivos, aqueles que propõem sintomas depressivos como agravantes da DA e aqueles que trazem análises estatísticas sem estabelecer claramente onde reside a relação de causalidade entre os dois quadros. Conclusões: Diversos estudos mostraram a existência de relação entre o quadro de DA e sintomas depressivos em vias distintas, tanto analisando a DA como agravante de sintomas depressivos como vice-versa. A partir dessa perspectiva, é possível que haja uma causalidade bidirecional cíclica, na qual um constante feedback positivo gera piora de ambos os quadros até que a abordagem adequada seja tomada, evidenciando a importância da propedêutica multidisciplinar para esses pacientes.(AU)

ABSTRACT: Introduction: Atopic dermatitis (AD) is characterized by chronic itching, presenting with fluctuating evolution, resulting in sleep disorders and social stigmatization due to the presence of visible and recurrent lesions, that might become progressively lichenified. Factors such as those mentioned and others associated, such as incapacity for work, lack of concentration throughout the day and isolation have profound impacts on the patient's mental health, resulting in low self-esteem, depression and frustration. In addition, it is known that AD is essentially an inflammatory disease. And, recent studies demonstrate the role of inflammatory cytokines in the development of depressive syndromes, therefore may be a causal correlation between the conditions by inflammatory pathways. Objectives: This systematic literature review aimed to analyze a relationship between atopic dermatitis and depressive symptoms, identifying mechanisms responsible for this connection. Methods: The research was carried out between 11/17/2020 and 11/18/2020 following the PRISMA model and using PUBMED, Virtual Health Library (VHL) - IBECS, LILACS and CUMED - and EMBASE databases. Keywords "Depression" and "Atopic Eczema", along with its MeSh and DECS terms, were used and associated using the Boolean method. Inclusion criteria were defined as articles that are clinical or observational trials involving a group of patients with atopic dermatitis and a control group, which could be constituted by the group with atopic dermatitis itself, however, after an intervention. The depressive symptoms had to be measured by scales or, at least, the criteria for diagnosis of depressed syndrome must have been established. Results:In the end, fifteen studies remained, which were classified among those that compare treatments and their outcomes related to depression and AD, those that propose AD as an aggravator of depressive symptoms, those that propose depressive symptoms as an aggravating factor for AD and those that bring statistical analysis without clearly establishing where the causality relation resides. Conclusion: Several studies have presented a relationship between the condition of AD and depressive symptoms in distinct pathways, or analyzing AD as an aggravating factor for depressive symptoms or vice-versa. From this perspective, there may be a cyclical bidirectional causality, in which constant positive feedback generates worsening of both conditions until the adequate approach is taken, highlighting the importance of the multidisciplinary propaedeutics for these patients. (AU)

Histoid leprosy presenting as a large tumor

Abstract Histoid leprosy is a rare form of multibacillary leprosy, characterized by the presence of papules, plaques, or nodules whose appearance is keloid-like, skin colored, or erythematous. Fusiform cells are the main histopathological feature. Due to the fact that it can simulate other dermatological lesions, for example, dermatofibroma and neurofibroma, it constitutes a diagnostic challenge for clinicians and pathologists. It is a bacilliferous form of leprosy, and it plays an important role in disease transmission. A case of a patient with histoid leprosy living in the Northeast Region of Brazil is reported.

Histoid leprosy presenting as a large tumor.

Histoid leprosy is a rare form of multibacillary leprosy, characterized by the presence of papules, plaques, or nodules whose appearance is keloid-like, skin colored, or erythematous. Fusiform cells are the main histopathological feature. Due to the fact that it can simulate other dermatological lesions, for example, dermatofibroma and neurofibroma, it constitutes a diagnostic challenge for clinicians and pathologists. It is a bacilliferous form of leprosy, and it plays an important role in disease transmission. A case of a patient with histoid leprosy living in the Northeast Region of Brazil is reported.

Prevalence of Systemic Arterial Hypertension and Diabetes Mellitus in Individuals with COVID-19: A Retrospective Study of Deaths in Pernambuco, Brazil. / Prevalência de Hipertensão Arterial Sistêmica e Diabetes Mellitus em Indivíduos com COVID-19: Um Estudo Retrospectivo de Óbitos em Pernambuco, Brasil.

Hipertensão arterial sistêmica (HAS) e diabetes mellitus (DM) são dois dos principais fatores de risco para a mortalidade por COVID-19. Descrever a prevalência e o perfil clínico-epidemiológico de óbito por COVID-19 ocorridos em Pernambuco, Brasil, entre 12 de março e 14 de maio de 2020 entre pacientes que possuíam hipertensão arterial sistêmica e/ou diabetes mellitus como doenças prévias. Estudo observacional transversal. Foram analisadas as seguintes variáveis: município de procedência, sexo, faixa etária, tempo entre o início dos sinais/sintomas e o óbito, sinais/sintomas, tipo de comorbidades e hábitos de vida. Variáveis categóricas foram descritas por meio de frequências e variáveis contínuas por meio de medidas de tendência central e de dispersão. Os testes de Mann-Whitney e Kruskal-Wallis foram utilizados. Dos 1.276 registros incluídos no estudo, 410 apresentavam HAS e/ou DM. A prevalência de HAS foi 26,5% (n=338) e de DM foi 19,7% (n=252). Dos registros, 158 (12,4%) eram de pacientes que possuíam somente HAS, 72 (5,6%) somente DM e 180 (14,1%) apresentavam HAS e DM. Dos indivíduos com HAS, 53,3% apresentavam DM e 71,4% dos diabéticos apresentam HAS. A mediana (em dias) do tempo entre o início dos sinais/sintomas e o desfecho óbito foi 8,0 (IIQ 9,0), sem diferença significativa entre os grupos de comorbidades (p=0,633), sexo (p=0,364) e faixa etária (p=0,111). Observou-se maior prevalência de DM e HAS na população masculina (DM ­ 61,3% eram homens e 38,9% mulheres; HAS ­ 53,2% eram homens e 46,8% mulheres). Os sinais/sintomas mais frequentes foram dispneia (74,1%; n=304), tosse (72,2%; n=296), febre (68,5%; n=281) e saturação de O2<95% (66,1%; n=271). Dos hipertensos, 73,3% (n=100) apresentavam outras comorbidades/fatores de risco associados, e 54,2% (n=39) dos diabéticos apresentavam outras comorbidades/fatores de risco associados. Destacaramse as cardiopatias (19,5%; n=80), obesidade (8,3%; n=34), doença respiratória prévia (7,3%; n=30) e nefropatia (7,8%; n=32). A prevalência de tabagismo foi 8,8% (n=36) e de etilismo alcançou 3,4% (n=14). O estudo mostrou que a prevalência de HAS foi superior à prevalência de DM nos indivíduos que foram a óbito por COVID-19. Em idosos, a prevalência foi superior à observada em indivíduos não idosos.

Structural and Functional Alterations in Mitochondria-Associated Membranes (MAMs) and in Mitochondria Activate Stress Response Mechanisms in an In Vitro Model of Alzheimer's Disease.

Alzheimer's disease (AD) is characterized by the accumulation of extracellular plaques composed by amyloid-ß (Aß) and intracellular neurofibrillary tangles of hyperphosphorylated tau. AD-related neurodegenerative mechanisms involve early changes of mitochondria-associated endoplasmic reticulum (ER) membranes (MAMs) and impairment of cellular events modulated by these subcellular domains. In this study, we characterized the structural and functional alterations at MAM, mitochondria, and ER/microsomes in a mouse neuroblastoma cell line (N2A) overexpressing the human amyloid precursor protein (APP) with the familial Swedish mutation (APPswe). Proteins levels were determined by Western blot, ER-mitochondria contacts were quantified by transmission electron microscopy, and Ca2+ homeostasis and mitochondria function were analyzed using fluorescent probes and Seahorse assays. In this in vitro AD model, we found APP accumulated in MAM and mitochondria, and altered levels of proteins implicated in ER-mitochondria tethering, Ca2+ signaling, mitochondrial dynamics, biogenesis and protein import, as well as in the stress response. Moreover, we observed a decreased number of close ER-mitochondria contacts, activation of the ER unfolded protein response, reduced Ca2+ transfer from ER to mitochondria, and impaired mitochondrial function. Together, these results demonstrate that several subcellular alterations occur in AD-like neuronal cells, which supports that the defective ER-mitochondria crosstalk is an important player in AD physiopathology.

Prevalência de hipertensão arterial sistêmica e diabetes mellitus em indivíduos com covid-19: um estudo retrospectivo de óbitos em pernambuco, brasil / Prevalence of systemic arterial hypertension and diabetes mellitus in individuals with covid-19: a retrospective study of deaths in pernambuco, brazil

Resumo Hipertensão arterial sistêmica (HAS) e diabetes mellitus (DM) são dois dos principais fatores de risco para a mortalidade por COVID-19. Descrever a prevalência e o perfil clínico-epidemiológico de óbito por COVID-19 ocorridos em Pernambuco, Brasil, entre 12 de março e 14 de maio de 2020 entre pacientes que possuíam hipertensão arterial sistêmica e/ou diabetes mellitus como doenças prévias. Estudo observacional transversal. Foram analisadas as seguintes variáveis: município de procedência, sexo, faixa etária, tempo entre o início dos sinais/sintomas e o óbito, sinais/sintomas, tipo de comorbidades e hábitos de vida. Variáveis categóricas foram descritas por meio de frequências e variáveis contínuas por meio de medidas de tendência central e de dispersão. Os testes de Mann-Whitney e Kruskal-Wallis foram utilizados. Dos 1.276 registros incluídos no estudo, 410 apresentavam HAS e/ou DM. A prevalência de HAS foi 26,5% (n=338) e de DM foi 19,7% (n=252). Dos registros, 158 (12,4%) eram de pacientes que possuíam somente HAS, 72 (5,6%) somente DM e 180 (14,1%) apresentavam HAS e DM. Dos indivíduos com HAS, 53,3% apresentavam DM e 71,4% dos diabéticos apresentam HAS. A mediana (em dias) do tempo entre o início dos sinais/sintomas e o desfecho óbito foi 8,0 (IIQ 9,0), sem diferença significativa entre os grupos de comorbidades (p=0,633), sexo (p=0,364) e faixa etária (p=0,111). Observou-se maior prevalência de DM e HAS na população masculina (DM — 61,3% eram homens e 38,9% mulheres; HAS — 53,2% eram homens e 46,8% mulheres). Os sinais/sintomas mais frequentes foram dispneia (74,1%; n=304), tosse (72,2%; n=296), febre (68,5%; n=281) e saturação de O2<95% (66,1%; n=271). Dos hipertensos, 73,3% (n=100) apresentavam outras comorbidades/fatores de risco associados, e 54,2% (n=39) dos diabéticos apresentavam outras comorbidades/fatores de risco associados. Destacaramse as cardiopatias (19,5%; n=80), obesidade (8,3%; n=34), doença respiratória prévia (7,3%; n=30) e nefropatia (7,8%; n=32). A prevalência de tabagismo foi 8,8% (n=36) e de etilismo alcançou 3,4% (n=14). O estudo mostrou que a prevalência de HAS foi superior à prevalência de DM nos indivíduos que foram a óbito por COVID-19. Em idosos, a prevalência foi superior à observada em indivíduos não idosos.

Pure neural leprosy or amyloid neuropathy? Systematic review and clinical case report.

OBJECTIVE: To review the literature and to report a clinical case with initial suspicion of pure neural leprosy and final diagnosis of amyloid neuropathy. METHODS: The study was conducted in two stages. In stage one, a systematic literature review was carried out, with searches performed in the PubMed, Medline, and Lilacs databases, as well as in the leprosy sectoral library of the Virtual Health Library, using the following descriptors: neuritic leprosy, pure neural leprosy, primary neural leprosy, pure neuritic leprosy, amyloid polyneuropathy, amyloid neuropathies, and amyloid polyneuropathy. The search was carried out on May 28, 2020. Clinical trials, cohort studies, cross-sectional studies, clinical cases, and case studies published in Portuguese, English or Spanish between 2010 and 2020 were included. Stage two reports a case with initial suspicion of pure neural leprosy. Laboratory tests, electroneuromyography, ultrasound, and biopsy of the sural nerve were requested. RESULTS: Twenty-three scientific texts were included. No publications were found that contained both topics together. The challenging diagnosis of pure neural leprosy and the possibility of using auxiliary resources in diagnosis were the most emphasized themes in the studies. In the clinical case, the patient's electroneuromyography showed sensitive and motor polyneuropathy of the lower limbs, which was predominantly sensory and axonal, symmetrical, of moderate intensity, and the mixed type (axonal-demyelinating). Ultrasonography of the sural nerve revealed changes in the contour of the deep fibular nerves; biopsy of the sural nerve showed an accumulation of amorphous eosinophilic material in the nerve path, and Congo red stain showed apple-green birefringence of the deposit under polarized light. The final diagnosis was amyloid neuropathy. CONCLUSIONS: The final clinical diagnosis was amyloid neuropathy. The diagnosis of pure neural leprosy in endemic areas in Brasil is still a challenge for the health system.

Epidemiological, neurofunctional profile and prevalence of factors associated with the occurrence of physical disabilities due to leprosy in a reference center in Northeast Brasil: a sectional study

SUMMARY OBJECTIVE: To describe the epidemiological and neurofunctional profile, as well as the prevalence of factors associated with the occurrence of physical disabilities due to leprosy in a reference center in Northeast Brasil. METHODS: A cross-sectional study including 50 leprosy patients diagnosed in Juazeiro-Bahia. Variables analyzed: sex, age, history of leprosy in the family, time to diagnosis, clinical form, operational classification, degree of disability, eyes-hand-foot score, peripheral nerve function, muscle strength and sensitivity. Descriptive statistics and inferential statistics (χ² test or Fisher's exact, Poisson regression with robust estimation and prevalence reason were used. Significance of 5%). RESULTS: An equal distribution was found between men and women of economically active age and low education; multibacillary forms in men (64%) and paucibacillary forms in women (60%). 78% of individuals had some degree of disability and 64% had a compromised ulnar nerve. Plantar sensitivity was decreased in 66% of patients. The predictors of disability were: age ≥45 years (PR 1.44; p=0.005), no education (PR 1.21; p=0.013) and OMP score ≥6 (PR 1.29; p<0.001). CONCLUSION: The findings show the importance of monitoring neural functions and developing measures that allow early diagnosis, the opportune method and the prevention of disabilities, especially in the male population.

Pure neural leprosy or amyloid neuropathy? Systematic review and clinical case report

SUMMARY OBJECTIVE: To review the literature and to report a clinical case with initial suspicion of pure neural leprosy and final diagnosis of amyloid neuropathy. METHODS: The study was conducted in two stages. In stage one, a systematic literature review was carried out, with searches performed in the PubMed, Medline, and Lilacs databases, as well as in the leprosy sectoral library of the Virtual Health Library, using the following descriptors: neuritic leprosy, pure neural leprosy, primary neural leprosy, pure neuritic leprosy, amyloid polyneuropathy, amyloid neuropathies, and amyloid polyneuropathy. The search was carried out on May 28, 2020. Clinical trials, cohort studies, cross-sectional studies, clinical cases, and case studies published in Portuguese, English or Spanish between 2010 and 2020 were included. Stage two reports a case with initial suspicion of pure neural leprosy. Laboratory tests, electroneuromyography, ultrasound, and biopsy of the sural nerve were requested. RESULTS: Twenty-three scientific texts were included. No publications were found that contained both topics together. The challenging diagnosis of pure neural leprosy and the possibility of using auxiliary resources in diagnosis were the most emphasized themes in the studies. In the clinical case, the patient's electroneuromyography showed sensitive and motor polyneuropathy of the lower limbs, which was predominantly sensory and axonal, symmetrical, of moderate intensity, and the mixed type (axonal-demyelinating). Ultrasonography of the sural nerve revealed changes in the contour of the deep fibular nerves; biopsy of the sural nerve showed an accumulation of amorphous eosinophilic material in the nerve path, and Congo red stain showed apple-green birefringence of the deposit under polarized light. The final diagnosis was amyloid neuropathy. CONCLUSIONS: The final clinical diagnosis was amyloid neuropathy. The diagnosis of pure neural leprosy in endemic areas in Brasil is still a challenge for the health system.

The hidden prevalence of leprosy: a comparative study between two Brazilian cities

SUMMARY OBJECTIVE: We compared the hidden prevalence of leprosy in two Brazilian cities with distinct differences regarding geographic region and socio-economic development profile, namely, Juazeiro, Bahia and Joinville, Santa Catarina. METHODS: A retrospective epidemiological study based on secondary data obtained from leprosy case notifications in the cities of Juazeiro-BA and Joinville-SC, 2007-2017. To calculate hidden prevalence, we used the method proposed by Gil Suárez and Lombardi. RESULTS: Joinville had 105 cases of leprosy that went undiagnosed (addition of 42.0% to the registered prevalence). For Juazeiro, it was estimated that 295 cases went undiagnosed (addition of 18.9%). CONCLUSION: Joinville presents a higher hidden prevalence than Juazeiro.

RESUMO OBJETIVO: Comparar a prevalência oculta de hanseníase entre duas cidades brasileiras com diferenças distintas quanto à região geográfica e perfil de desenvolvimento socioeconômico, como Juazeiro, Bahia e Joinville, Santa Catarina. MÉTODOS: Estudo epidemiológico retrospectivo baseado em dados secundários obtidos nas notificações de casos de hanseníase nos municípios de Juazeiro-BA e Joinville-SC, 2007-2017. Para o cálculo da prevalência oculta foi utilizado o método proposto por Gil Suárez e Lombardi. Resultados: Joinville teve 105 casos de hanseníase que não foram diagnosticados no período (adição de 42,0% à prevalência registrada). Para Juazeiro, estimou-se que 295 casos não foram diagnosticados (adição de 18,9%). CONCLUSÃO: Joinville apresentou maior prevalência oculta que Juazeiro.

Tuberculosis in Northeastern Brasil (2001-2016): trend, clinical profile, and prevalence of risk factors and associated comorbidities

SUMMARY OBJECTIVE: To describe the temporal trend, clinical profile, and the prevalence of risk factors and associated comorbidities in new cases of tuberculosis in the Northeast (2001-2016). METHODS: A prevalence study involving all tuberculosis cases registered in Northeast Brasil, 2001-2016. Data were obtained from the National System of Notification of Disorders. For statistical analysis, the inflection point regression model and descriptive statistics were used. RESULTS: 331,245 cases of tuberculosis were reported. The overall incidence rate decreased from 44.84/100,000 inhabitants (2001) to 30.92/100,000 inhabitants (2016), with a decreasing trend (AAPC: −2.3; p<0.001). The profile was characterized by men (73.53%), age 20-59 years (73.56%), pulmonary tuberculosis (86.37%), positive smear microscopy (54.78%). The main risk factors and comorbidities were: AIDS (4.64%), HIV (12.10%), Diabetes mellitus (5.46%), alcohol (11.63%), institutionalized, (4.31%) and deprived of liberty (2.30%). The cure rate was 70.66% and the abandonment rate was 9.11%. CONCLUSIONS: Even with a reduced incidence, tuberculosis represents a real public health problem in the Northeast region. The profile was characterized by a male population, in economically-active age, lung smear-positive pulmonary presentation, and the risk factors and comorbidities of Aids, TB/HIV co-infection, diabetes mellitus, alcohol consumption, institutionalized and deprived of freedom reflect the complexity of the challenges in facing the disease.

RESUMO OBJETIVO: Descrever a tendência temporal, o perfil clínico e a prevalência de fatores de risco e comorbidades associadas em casos novos de tuberculose no Nordeste (2001-2016). MÉTODOS: Estudo de prevalência envolvendo todos os casos de tuberculose registrados no Nordeste do Brasil, no período 2001-2016. Os dados foram obtidos do Sistema de Nacional de Agravos de Notificação. Para a análise estatística, empregaram-se o modelo de regressão por pontos de inflexão e a estatística descritiva. RESULTADOS: Foram notificados 331.245 casos de tuberculose. A taxa de incidência geral reduziu de 44,84/100.000 habitantes (2001) para 30,92/100.000 habitantes (2016), com tendência decrescente (AAPC: −2,3; p<0,001). O perfil foi caracterizado por homens (73,53%), idade 20-59 anos (73,56%), tuberculose pulmonar (86,37%), baciloscopia positiva (54,78%). Os principais fatores de risco e comorbidade foram: Aids (4,64%), HIV (12,10%), Diabetes mellitus (5,46%), álcool (11,63%), institucionalizados (4,31%) e população privada de liberdade (2,30%). A taxa de cura foi 70,66% e a de abandono, 9,11%. CONCLUSÕES: Mesmo com redução da incidência, a tuberculose representa um real problema de saúde pública na região Nordeste. O perfil caracterizado pela população masculina, idade economicamente ativa, forma pulmonar com baciloscopia positiva e os fatores e comorbidade Aids, coinfecção TB/HIV, diabetes mellitus, consumo de álcool, institucionalizados e privados de liberdade refletem a complexidade dos desafios para o enfrentamento à doença.

In vitro phototherapeutic effects of indolenine-based mono- and dithiosquaraine cyanine dyes against Caco-2 and HepG2 human cancer cell lines.

Photodynamic therapy is a noninvasive approach for the treatment of oncological and nononcological diseases which has attempted to address the shortcomings and disadvantages of conventional cancer therapies. Given the scarcity of photosensitizers that exhibit desirable characteristics for its potential application in this therapeutic strategy, the main aims of this work were the study of the photophysical and photochemical properties, and the in vitro photobiological activity of several squaraine cyanine dyes. Thus, herein, the synthesis of indolenine-based N-methyl and N-ethyl mono- and dithiosquaraine dyes, the study of their spectroscopical properties, aggregation behavior, photodegradation and singlet oxygen production ability, and the further application of the previously synthesized dyes in colorectal adenocarninoma and hepatocellular carcinoma cell lines to evaluate their phototherapeutic effects, are described. Thionation significantly favored the ability to singlet oxygen production, and moderate photostability was observed for squaraine and monothionated dyes. Squaraine and monothiosquaraine cyanine dyes showed high promise within the tested concentration range regarding their potential application as cancer photodynamic therapy photosensitizers. Squaraine dyes' monothionation resulted in the preparation of compounds with poor photocytotoxicity, which was an undesirable effect on their phototherapeutic application.