Acute isometric and dynamic exercise do not alter cerebral sympathetic nerve activity in healthy humans.

The impact of physiological stressors on cerebral sympathetic nervous activity (SNA) remains controversial. We hypothesized that cerebral noradrenaline (NA) spillover, an index of cerebral SNA, would not change during both submaximal isometric handgrip (HG) exercise followed by a post-exercise circulatory occlusion (PECO), and supine dynamic cycling exercise. Twelve healthy participants (5 females) underwent simultaneous blood sampling from the right radial artery and right internal jugular vein. Right internal jugular vein blood flow was measured using Duplex ultrasound, and tritiated NA was infused through the participants' right superficial forearm vein. Heart rate was recorded via electrocardiogram and blood pressure was monitored using the right radial artery. Total NA spillover increased during HG (P = 0.049), PECO (P = 0.006), and moderate cycling exercise (P = 0.03) compared to rest. Cerebral NA spillover remained unchanged during isometric HG exercise (P = 0.36), PECO after the isometric HG exercise (P = 0.45), and during moderate cycling exercise (P = 0.94) compared to rest. These results indicate that transient increases in blood pressure during acute exercise involving both small and large muscle mass do not engage cerebral SNA in healthy humans. Our findings suggest that cerebral SNA may be non-obligatory for exercise-related cerebrovascular adjustments.

Milligram scale enantioresolution of promethazine and its main metabolites, determination of their absolute configuration and assessment of enantioselective effects on human SY-SY5Y cells.

The misuse of pharmaceuticals has significantly increased in recent decades, becoming a major public health concern. The risks associated with medication misuse are particularly high in cases of overdose, especially when the active substances are chiral, as enantioselectivity plays an important role in toxicity. Promethazine (PMZ) is a chiral antihistamine marketed as a racemate and it is misused in "Purple Drank", a recreational drug beverage, that combines codeine and/or PMZ, with soda or alcohol leading to serious health consequences and fatalities in consumers around the world, particularly among teenagers. Information regarding the enantioselectivity in the toxicity of (R,S)-PMZ and its main metabolites, namely promethazine sulfoxide (PMZSO) and desmonomethyl promethazine (DMPMZ), is unknown. This work reported, for the first time, the enantioseparation, in milligram scale, of (R,S)-PMZ, (R,S)-DMPMZ, (R,S)- PMZSO and the determination of their absolute configurations by electronic circular dichroism (ECD). The enantioseparation of all the six enantiomers was accomplished in a homemade semi-preparative column with amylose tris-3,5-dimethylphenylcarbamate (AD) coated with aminopropyl Nucleosil silica. The enantiomeric purity was evaluated using the analytical Lux® 3 µm i-Amylose-3 column, yielding enantiomeric purity values ranging between 94.4% and 99.7%. The elution order of all the enantiomers was accomplished combining the ECD results with an optical rotation detector. The elution order of the enantiomers was influenced only by the chiral selector, rather than the mobile phase. The cytotoxicity of the racemates and the isolated enantiomers towards differentiated SH-SY5Y cells was evaluated. (R,S)-DMPMZ exhibited a significantly higher cytotoxicity than (R,S)-PMZ, suggesting the metabolic bioactivation of (R,S)-PMZ. Conversely, no significant cytotoxicity was found for (R,S)-PMZSO, underscoring a metabolic detoxification pathway. Remarkably, enantioselectivity was observed for the cytotoxicity of PMZ; (R)-PMZ was significantly more cytotoxic than (S)-PMZ. The results underscore the importance to isolate the enantiomers in their enantiomerically form and their correct identification for toxicity enantioselectivity studies, which are vital to understand the drug's behaviour and safety, especially in case of overdoses.

Análise das produções científicas sobre atenção integral à saúde do homem: revista Nursing brasileira / Analysis of scientific productions on comprehensive care for men's health: Brazilian Nursing magazine

Objetiva-se analisar as produções cientificas sobre a atenção integral da saúde do homem na Revista Nursing brasileira, São Paulo. Método: trata-se de uma revisão integrativa de literatura, utilizando as bases de dados LILACS e BDENF, o corte epistemológico foi de 2009 a 2019, a amostra final constituiu-se de 10 artigos. Resultados: os dados analisados foram divididos a partir de associações temáticas, em quatro categorias: acesso e acolhimento; saúde sexual e saúde reprodutiva; doenças prevalentes na população masculina e prevenção de violência e acidentes. Conclui-se que o cuidado integral a saúde do homem, e colocá-los como sujeito do cuidado, com autonomia, independência e responsabilidade social.(AU)

The objective is to analyze scientific productions on comprehensive men's health care in the Brazilian Nursing Journal, São Paulo. Method: This is an integrative literature review, using the LILACS and BDENF databases, the epistemological cut was from 2009 to 2019, the final sample consisted of 10 articles. Results: The data analyzed was divided into four categories based on thematic associations: access and reception; sexual health and reproductive health; prevalent diseases in the male population; and prevention of violence and accidents. The conclusion is that comprehensive care for men's health should place them as the subject of care, with autonomy, independence and social responsibility.(AU)

El objetivo es analizar la producción científica sobre atención integral a la salud masculina en la Revista Brasileña de Enfermería, São Paulo. Método: Se trata de una revisión bibliográfica integradora, utilizando las bases de datos LILACS y BDENF, el corte epistemológico fue de 2009 a 2019, la muestra final constó de 10 artículos. Resultados: Los datos analizados se dividieron en cuatro categorías a partir de asociaciones temáticas: acceso y acogida; salud sexual y salud reproductiva; enfermedades prevalentes en la población masculina; y prevención de violencia y accidentes. Se concluye que la atención integral a la salud del hombre debe colocarlo como sujeto de cuidados, con autonomía, independencia y responsabilidad social.(AU)

The CUT&RUN greenlist: genomic regions of consistent noise are effective normalizing factors for quantitative epigenome mapping.

Cleavage Under Targets and Release Using Nuclease (CUT&RUN) is a recent development for epigenome mapping, but its unique methodology can hamper proper quantitative analyses. As traditional normalization approaches have been shown to be inaccurate, we sought to determine endogenous normalization factors based on the human genome regions of constant nonspecific signal. This constancy was determined by applying Shannon's information entropy, and the set of normalizer regions, which we named the 'Greenlist', was extensively validated using publicly available datasets. We demonstrate here that the greenlist normalization outperforms the current top standards, and remains consistent across different experimental setups, cell lines and antibodies; the approach can even be applied to different species or to CUT&Tag. Requiring no additional experimental steps and no added cost, this approach can be universally applied to CUT&RUN experiments to greatly minimize the interference of technical variation over the biological epigenome changes of interest.

Evaluation of bone mineral density, microarchitecture, and detection of fractures on young patients living with human immunodeficiency virus: when and how to screen?

PURPOSE: People living with the human immunodeficiency virus (PLWH) developed higher life expectancy along with chronic bone disease over the past years. Our purpose is to evaluate bone mineral density, bone microarchitecture and fractures in young PLWH and understand the disease's contribution to bone derangements and fracture risk. METHODS: Eighty-one HIV-infected and 54 control young (20-50 years) male and female subjects were enrolled in this study. Methods for patient evaluation included DXA-VFA (dual energy X-rays and vertebral fracture assessment), HR-pQCT (high resolution peripheral quantitative computed tomography), biochemistry and FRAX. RESULTS: Fifty participants from each group completed all exams. Median age was 40 (25-49) vs. 36.5 (22-50) for the HIV and control groups, respectively (p 0.120). Ethnicity, body mass index, serum phosphorus, 25-hydroxyvitamin D, PTH and CTX were similar between groups, although ALP and OC suggested higher bone turnover in PLWH. VFA identified morphometric vertebral fractures in 12% of PLWH. PLWH had lower values for lumbar spine areal BMD and Z score, volumetric BMD, trabecular bone fraction (BV/TV) and trabecular number measured at the distal tibia by HR-pQCT; as a consequence, trabecular separation and heterogeneity were higher (all p < 0.05). The FRAX-estimated risk for hip and major osteoporotic fractures was statistically higher in PLWH (p < 0.001). CONCLUSION: Our results confirm severe bone impairment and fractures associated with HIV in young patients. Thus, we developed a screening protocol for young PLWH to detect bone fragility, reduce skeletal disease progression and morbimortality, decrease fracture risk, and increase quality of life.

Long-term consequences of osteoporosis therapy with bisphosphonates

ABSTRACT Bisphosphonates (BPs) are medications widely used in clinical practice to treat osteoporosis and reduce fragility fractures. Its beneficial effects on bone tissue have been consolidated in the literature for the last decades. They have a high affinity for bone hydroxyapatite crystals, and most bisphosphonates remain on the bone surface for a long period of time. Benefits of long-term use of BPs: Large and important trials (Fracture Intervention Trial Long-term Extension and Health Outcomes and Reduced Incidence with Zoledronic acid Once Yearly-Pivotal Fracture Trial) with extended use of alendronate (up to 10 years) and zoledronate (up to 6 years) evidenced significant gain of bone mineral density (BMD) and vertebral fracture risk reduction. Risks of long-term use of BPs: The extended use of antiresorptive therapy has drawn attention to two extremely rare, although severe, adverse events. That is, atypical femoral fracture and medication-related osteonecrosis of the jaw are more common in patients with high cumulative doses and longer duration of therapy. BPs have demonstrated safety and effectiveness throughout the years and evidenced increased BMD and reduced fracture risks, resulting in reduced morbimortality, and improved quality of life. These benefits overweight the risks of rare adverse events.

Práticas integrativas e complementares em saúde entre estudantes universitários: motivos de uso e de não uso / Integrative and complementary health practices among university students: reasons for use or non-use

Resumo O objetivo deste estudo é compreender os motivos de uso e não uso das práticas integrativas e complementares entres estudantes universitários da área da saúde. Trata-se de uma pesquisa quanti-qualitativa, com dados coletados por meio de questionários (667) e entrevistas (34) e submetidos à análise de conteúdo. Os efeitos terapêuticos, a influência familiar e a oferta de alternativa à biomedicina foram as principais razões elencadas para o uso das práticas integrativas e complementares, ao tempo que a ausência de demanda, o desinteresse e a falta de oportunidade foram as motivações mais frequentes para o não uso. Nesse sentido, as motivações de uso enfatizam as vantagens obtidas através da interlocução com essas práticas e alguns contextos que determinam sua adoção. Em relação às motivações de não uso, destaca-se um cenário de baixa oferta e dominância da biomedicina na cultura ocidental contemporânea. Portanto, esses resultados corroboram a demanda de enfrentamento da monocultura da biomedicina, bem como a abordagem das práticas integrativas na educação superior. Desse modo, a universidade pode se construir a partir da tessitura entre diferentes culturas em saúde, com a facilitação do emprego das práticas não hegemônicas e a ampliação das bases epistêmicas de cuidado na formação e vida da comunidade acadêmica.

Abstract The objective of this study is to understand the reasons for use or non-use of the integrative and complementary practices among university health students. It is a quantitative and qualitative research, with data collected with questionnaires (667) and interviews (34), and investigated by content analysis. Therapeutic effects, family influence, and offer of alternatives to biomedicine were the main reasons for use of integrative and complementary practices, while the absence of demand, disinterest, and lack of opportunity were the most frequent barriers for use. Therefore, the motivations for use emphasize advantages obtained with these practices and some contexts that determine their adoption. Regarding the barriers for use, a scenario of low availability and dominance of biomedicine in contemporary western culture stands out. Therefore, these results corroborate the demand to confront the monoculture of biomedicine, as well as the inclusion of integrative practices in higher health education. Thus, university can be built on dialogues between different cultures in health, facilitating the use of non-hegemonic practices and expanding the epistemic bases of care in the formation and the life of the academic community.

Seroprevalence of hepatitis E virus in patients with chronic liver disease.

INTRODUCTION: The seroprevalence of hepatitis E virus (HEV) in patients with chronic liver disease (CLD) is little known in Brazil. Studies have suggested that HEV may harmfully influence the course of CLD, with a higher risk of progression to cirrhosis. OBJECTIVE: To estimate the prevalence of the anti-HEV antibody (IgG) in patients with CLD and to describe demographic data and risk factors, as well as clinical-laboratory and ultrasound parameters. PATIENTS AND METHODS: Cross-sectional study that included 227 patients with CLD followed at a referral outpatient clinic from June 2022 to March 2023. The patients were investigated clinically and tested for liver functions, anti-HEV IgG and, in positive cases, for HEV-RNA. Ultrasonography of the upper abdomen was also carried out. RESULTS: Investigation of 227 patients (50 with hepatitis B, 49 with nonalcoholic fatty liver disease, 33 with hepatitis C, 17 with alcoholic liver disease, 16 with schistosomiasis and 62 with mixed disease), 55.5% were female, with an average age of 57 ± 13 years; 37.9% had liver cirrhosis. Seven patients (3.08%) presented anti-HEV positive and HEV-RNA negative. Ultrasound identified association between anti-HEV and contact with pigs, presence of gynecomastia or palmar erythema, lower platelet count, higher APRI and FIB-4 values, and splenomegaly. CONCLUSION: Although the prevalence of anti-HEV in patients with CLD was low in this study, the antibody was observed more frequently in cases with a history of contact with pigs and with clinical-laboratory or imaging evidence of more advanced chronic liver disease.

Long-term consequences of osteoporosis therapy with bisphosphonates.

Bisphosphonates (BPs) are medications widely used in clinical practice to treat osteoporosis and reduce fragility fractures. Its beneficial effects on bone tissue have been consolidated in the literature for the last decades. They have a high affinity for bone hydroxyapatite crystals, and most bisphosphonates remain on the bone surface for a long period of time. Benefits of long-term use of BPs: Large and important trials (Fracture Intervention Trial Long-term Extension and Health Outcomes and Reduced Incidence with Zoledronic acid Once Yearly-Pivotal Fracture Trial) with extended use of alendronate (up to 10 years) and zoledronate (up to 6 years) evidenced significant gain of bone mineral density (BMD) and vertebral fracture risk reduction. Risks of long-term use of BPs: The extended use of antiresorptive therapy has drawn attention to two extremely rare, although severe, adverse events. That is, atypical femoral fracture and medication-related osteonecrosis of the jaw are more common in patients with high cumulative doses and longer duration of therapy. BPs have demonstrated safety and effectiveness throughout the years and evidenced increased BMD and reduced fracture risks, resulting in reduced morbimortality, and improved quality of life. These benefits overweight the risks of rare adverse events.

Work conditions and biosafety of health professionals and invisible health workers in the context of COVID-19 in Brazil. / Condições de trabalho e biossegurança dos profissionais de saúde e trabalhadores invisíveis da saúde no contexto da COVID-19 no Brasil.

The present article addresses the work conditions in health in the context of the COVID-19 pandemic in Brazil. This is a cross-sectional study that used data from the surveys "Working conditions of healthcare professionals in the context of Covid-19 in Brazil" and "Invisible healthcare workers: work conditions and mental health in the context of Covid-19 in Brazil", seeking to better understand the working conditions and biosafety of these two distinct and socially unequal professional contingents. Data analysis proves that work conditions were extremely affected due to inadequate infrastructures, strenuous work, biosecurity at risk, exhaustion, fear of contamination and death, strong signs of physical and mental exhaustion, among workers. It also points out the discrimination and inequalities of social rights and professional development that mark the worlds of work highlighted in the surveys, emphasizing the profound inequalities that exist in Brazil and in its regions. It concludes by showing the importance of formulating public policies within the scope of work management in SUS, which ensures the protection, appreciation and reduction of inequalities pointed out in this article.

O artigo versa sobre as condições de trabalho na saúde no contexto da pandemia no Brasil. Trata-se de estudo transversal que utilizou dados de recorte das pesquisas "Condições de trabalho dos profissionais de saúde no contexto da Covid-19 no Brasil" e "Os Trabalhadores invisíveis da saúde: condições de trabalho e saúde mental no contexto da Covid-19 no Brasil", objetivando conhecer as condições de trabalho e a biossegurança desses dois contingentes profissionais distintos e desiguais, socialmente. A análise dos dados comprova que as condições de trabalho foram extremamente afetas em função da infraestrutura inadequada, trabalho extenuante, biossegurança em risco, exaustão, medo da contaminação e da morte, fortes sinais de esgotamento físico e mental entre os trabalhadores. Aponta também para discriminação e desigualdades de direitos sociais e de valorização profissional que demarcam os mundos do trabalho apontados nas pesquisas, enfatizando as profundas desigualdades existentes no Brasil e em suas regiões. Conclui-se mostrando a importância de formulação de políticas públicas no âmbito da gestão do trabalho no SUS que assegurem a proteção, valorização e redução das desigualdades apontadas no artigo.

Condições de trabalho e biossegurança dos profissionais de saúde e trabalhadores invisíveis da saúde no contexto da COVID-19 no Brasil / Work conditions and biosafety of health professionals and invisible health workers in the context of COVID-19 in Brazil

Resumo O artigo versa sobre as condições de trabalho na saúde no contexto da pandemia no Brasil. Trata-se de estudo transversal que utilizou dados de recorte das pesquisas "Condições de trabalho dos profissionais de saúde no contexto da Covid-19 no Brasil" e "Os Trabalhadores invisíveis da saúde: condições de trabalho e saúde mental no contexto da Covid-19 no Brasil", objetivando conhecer as condições de trabalho e a biossegurança desses dois contingentes profissionais distintos e desiguais, socialmente. A análise dos dados comprova que as condições de trabalho foram extremamente afetas em função da infraestrutura inadequada, trabalho extenuante, biossegurança em risco, exaustão, medo da contaminação e da morte, fortes sinais de esgotamento físico e mental entre os trabalhadores. Aponta também para discriminação e desigualdades de direitos sociais e de valorização profissional que demarcam os mundos do trabalho apontados nas pesquisas, enfatizando as profundas desigualdades existentes no Brasil e em suas regiões. Conclui-se mostrando a importância de formulação de políticas públicas no âmbito da gestão do trabalho no SUS que assegurem a proteção, valorização e redução das desigualdades apontadas no artigo.

Abstract The present article addresses the work conditions in health in the context of the COVID-19 pandemic in Brazil. This is a cross-sectional study that used data from the surveys "Working conditions of healthcare professionals in the context of Covid-19 in Brazil" and "Invisible healthcare workers: work conditions and mental health in the context of Covid-19 in Brazil", seeking to better understand the working conditions and biosafety of these two distinct and socially unequal professional contingents. Data analysis proves that work conditions were extremely affected due to inadequate infrastructures, strenuous work, biosecurity at risk, exhaustion, fear of contamination and death, strong signs of physical and mental exhaustion, among workers. It also points out the discrimination and inequalities of social rights and professional development that mark the worlds of work highlighted in the surveys, emphasizing the profound inequalities that exist in Brazil and in its regions. It concludes by showing the importance of formulating public policies within the scope of work management in SUS, which ensures the protection, appreciation and reduction of inequalities pointed out in this article.

Interações familiares em famílias com adolescentes / Family interactions in families with adolescents

A área de enfermagem de saúde familiar pretende dar resposta às necessidades em saúde das famílias, tendo em conta as exigências e especificidades do seu desenvolvimento ao longo do ciclo vital e nas suas transições. As famílias com adolescentes encontram-se a vivenciar uma transição desenvolvimental, com repercussões no quotidiano das famílias e que requer uma restruturação da dinâmica familiar, com a reformulação de papéis por parte dos seus membros e consequente ajuste nas relações intrafamiliares. Objetivos: Evidenciar as competências comuns e específicas adquiridas na área de enfermagem de saúde familiar durante as atividades clínicas e apresentar um estudo de investigação que emergiu da prática clínica, relativamente às necessidades das famílias com adolescentes, no que concerne às suas relações e interações entre os membros da família. Metodologia: Na atividade clínica foram descritas as atividades desenvolvidas para a aquisição e desenvolvimento de competências na prestação de cuidados especializados às famílias; na atividade de investigação foi desenvolvido um estudo transversal, descritivo, predominantemente quantitativo. A população acessível foi constituída por 50 famílias com adolescentes entre os 10 e os 13 anos inscritas numa Unidade de Saúde Familiar que cumpriram os critérios de inclusão. A recolha de dados foi realizada através de entrevista com suporte num questionário baseado na matriz operativa do Modelo Dinâmico de Avaliação e Intervenção Familiar com duas questões de resposta aberta dirigidas à família e aplicação de instrumentos de avaliação familiar (Graffar, FACES II e Apgar Familiar). Resultados: O recurso a referenciais teóricos e operativos foi essencial permitindo identificar com as famílias os seus pontos fortes e as suas necessidades sensíveis aos cuidados de enfermagem; os resultados do estudo empírico evidenciaram a Relação Dinâmica e o Coping Familiar como as áreas de atenção com maior potencialidade e a Comunicação Familiar como área com maior fragilidade. Na perceção das famílias possuem mais aspetos facilitadores do que dificuldades na interação entre os seus membros, destacando-se o padrão de interação como o aspeto facilitador mais identificado e a comunicação circular como a dificuldade mais referida. Conclusão: As atividades clínicas possibilitaram o desenvolvimento de competências comuns e específicas inerentes ao Enfermeiro Especialista em Enfermagem Comunitária-área de Enfermagem de Saúde Familiar; a identificação das necessidades de cuidados de enfermagem nas famílias com adolescentes a nível do funcionamento familiar (comunicação, fragilidades/fraquezas e padrão de interação), poderá contribuir para a implementação de melhores práticas na área da enfermagem de saúde familiar.

The Influence of Lockdown Due to the COVID-19 Pandemic on Weight Management in Patients With Obesity in Portugal.

INTRODUCTION: Obesity is a chronic and multifactorial disease, and the COVID-19 pandemic and lockdown have led to changes in the lifestyle habits of those patients. This study aimed to compare compliance with dietary and lifestyle measures, physical activity, mental health status, and motivation to lose weight during the pandemic in these patients. METHODS: An observational study was conducted, which included 63 patients over 18 years old who were followed in the outpatient setting through obesity medical appointments and who agreed to answer a questionnaire. RESULTS: We found that the majority of patients lost weight during the pandemic (61.7%), associating it with a 68% change in dietary habits. Regarding physical activity, there was a 34.9% reduction in its practice among those who used to exercise before the pandemic. Moreover, 52.4% felt more anxious and 44.4% felt sadder during the lockdown. DISCUSSION: The weight loss reported in our study seems to be related to a decrease in the consumption of carbohydrates and snacks and a lower percentage of those who relied on takeaways. Additionally, we hypothesize a greater number of home-cooked meals. Regarding exercise, the closure of gyms and the limitations imposed on daily life appear to have contributed unfavorably to this matter. Home confinement, loneliness, and a lack of social activities had harmful effects on the mental health of our sample. CONCLUSION: Overall, the hostile influence of the pandemic on mental well-being and exercise habits was evident. Nevertheless, contrary to our expectations, we observed weight loss during the lockdown.

Evolutionary and Ecological Processes Underlying Geographic Variation in Innate Bird Songs.

AbstractEcological and evolutionary processes underlying spatial variation in signals involved in mate recognition and reproductive isolation are crucial to understanding the causes of population divergence and speciation. Here, to test hypotheses concerning the causes of song divergence, we examine how songs of two sister species of Atlantic Forest suboscine birds with innate songs, the Pyriglena fire-eye antbirds, vary across their ranges. Specifically, we evaluated the influence of isolation by distance and introgressive hybridization, as well as morphological and environmental variation, on geographic variation in male songs. Analyses based on 496 male vocalizations from 63 locations across a 2,200-km latitudinal transect revealed clinal changes in the structure of songs and showed that introgressive hybridization increases both the variability and the homogenization of songs in the contact zone between the two species. We also found that isolation by distance, morphological constraints, the environment, and genetic introgression independently predicted song variation across geographic space. Our study shows the importance of an integrative approach that investigates the roles of distinct ecological and evolutionary processes that influence acoustic signal evolution.

Reproductive plans and knowledge of assisted reproductive techniques among lesbian women: an international survey study.

OBJECTIVE: Lesbian couples must resort to adoption or donated semen to achieve parenthood, the latter usually involving assisted reproductive technology. The aim of this study is to assess homosexual women's knowledge about assisted reproductive techniques, the importance of perceived genetic and gestational relationships for their future mother-child bond, as well as their reproductive plans. METHODS: This is an observational study based on an anonymous survey disseminated online in several countries on different continents, addressed to homosexual women. RESULTS: From the 549 participants, most reported being well informed about reproductive options including assisted reproductive technology. The majority want to be a mother as part of a couple, mainly through assisted reproduction or step adoption of their partner's child. The importance of a genetic or gestational relationships with their future child varies greatly between women. Among the sampled women, pregnancy was believed to have a slightly greater impact on the future mother-child connection compared to genetics. CONCLUSIONS: Homosexual women are well informed about the assisted reproductive technology treatments. The majority considers it important to become a mother as a couple, mainly through assisted reproduction or step adoption of their partner's child. The importance given to gestation or genetic mother-child relationships varies greatly between women, and it seems they believe pregnancy may have a slightly greater impact on the future mother-child connection compared to genetics.

Maxillary Parosteal Osteosarcoma: Additional case Report and Literature Review of Surface Osteosarcomas.

Introduction: Surface osteosarcomas represent around 3-6% of all osteosarcomas, which include the parosteal (low-grade), periosteal (intermediate-grade) and high-grade surface osteosarcomas. The classical location is the femur, followed by tibia and humerus. Parosteal osteosarcoma is the most common type of surface osteosarcoma. To date, 26 cases of parosteal osteosarcoma affecting the jaws have been reported, with most cases following an evolution time of several months to years, clinically favoring a benign osseous or fibro-osseous lesion. Methods: Here, we report a 39-year-old female who was referred presenting a maxillary tumoral mass 5 years ago, clinically diagnosed as osteoma. After clinical, imaginological and histopathological analysis, a diagnosis of parosteal osteosarcoma was made. Conclusion: Thus, parosteal osteosarcoma should also be considered in the differential diagnosis of benign-appearance, bone-forming nodular lesions affecting the jaws.

Addressing extreme size mismatch in pediatric intestinal transplantation: Outcomes of intestinal length reduction.

BACKGROUND: Bench liver reduction, with or without intestinal length reduction (LR) (coupled with delayed closure and abdominal wall prostheses), has been a strategy adopted by our program for small children due to the limited availability of size-matched donors. This report describes the short, medium, and long-term outcomes of this graft reduction strategy. METHODS: A single-center, retrospective analysis of children that underwent intestinal transplantation (April 1993 to December 2020) was performed. Patients were grouped according to whether they received an intestinal graft of full length (FL) or following LR. RESULTS: Overall, 105 intestinal transplants were performed. The LR group (n = 10) was younger (14.5 months vs. 40.0 months, p = .012) and smaller (8.7 kg vs. 13.0 kg, p = .032) compared to the FL group (n = 95). Similar abdominal closure rates were achieved after LR, without any increase in abdominal compartment syndrome (1/10 vs. 7/95, p = .806). The 90-day graft and patient survival were similar (9/10, 90% vs. 83/95, 86%; p = .810). Medium and long-term graft survival at 1 year (8/10, 80% vs. 65/90, 71%; p = .599), and 5 years (5/10, 50% vs. 42/84, 50%; p = 1.00) was similar. CONCLUSION: LR of intestinal grafts appears to be a safe strategy for infants and small children requiring intestinal transplantation. This technique should be considered in the situation of significant size mismatch of intestine containing grafts.

Low concentrations of grape seed extract maintain osteoblast morphology, cell adhesion, and mineralization.

The increase in life expectancy has led to a higher incidence of osteoporosis, characterized by an imbalance in bone remodeling. Several drugs are used for its treatment, but most promote undesirable side effects. The present investigation evaluated the effects of two low concentrations of grape seed extract (GSE) rich in proanthocyanidins on MC3T3-E1 osteoblastic cells. The cells were cultured in an osteogenic medium and divided into control (C), 0.1 µg/mL GSE (GSE0.1), and 1.0 µg/mL GSE (GSE1.0) groups to evaluate cell morphology, adhesion, and proliferation, in situ alkaline phosphatase (ALP) detection, mineralization and immunolocalization of osteopontin (OPN). The data obtained were analyzed by statistical tests for a significance of 5%. Cell morphology was maintained with both GSE concentrations, whereas cell adhesion significantly increased within three days in all groups. Cell proliferation increased significantly at seven days of culture, followed by a significant decrease in all experimental periods, with no statistical difference among them. In situ detection of ALP and mineralization increased with time, but within each period, no statistical differences among groups were observed. The expression of osteopontin was distributed regularly with more intensity after 24 hours in the GSE0.1 group. After three days, OPN expression was more intense in the control group, followed by GSE0.1 and GSE1.0 groups. Data obtained suggest that low concentrations of GSE do not affect the morphology and may stimulate the functional activity of osteoblastic cells.

Single-cell adaptations shape evolutionary transitions to multicellularity in green algae.

The evolution of multicellular life has played a pivotal role in shaping biological diversity. However, we know surprisingly little about the natural environmental conditions that favour the formation of multicellular groups. Here we experimentally examine how key environmental factors (predation, nitrogen and water turbulence) combine to influence multicellular group formation in 35 wild unicellular green algae strains (19 Chlorophyta species). All environmental factors induced the formation of multicellular groups (more than four cells), but there was no evidence this was adaptive, as multicellularity (% cells in groups) was not related to population growth rate under any condition. Instead, population growth was related to extracellular matrix (ECM) around single cells and palmelloid formation, a unicellular life-cycle stage where two to four cells are retained within a mother-cell wall after mitosis. ECM production increased with nitrogen levels resulting in more cells being in palmelloids and higher rates of multicellular group formation. Examining the distribution of 332 algae species across 478 lakes monitored over 55 years, showed that ECM and nitrogen availability also predicted patterns of obligate multicellularity in nature. Our results highlight that adaptations of unicellular organisms to cope with environmental challenges may be key to understanding evolutionary routes to multicellular life.

Synergism between chikungunya virus infection and rheumatoid arthritis on cytokine levels: Clinical implications?

Post-chikungunya virus (CHIKV) chronic arthritis shares several immunopathogenic mechanisms with rheumatoid arthritis (RA), which has led to discussions about the probable relationship between the two diseases. Indeed, some studies have suggested a role for CHIKV infection in RA development. However, to the best of our knowledge, the influence of CHIKV on previous RA has not yet been demonstrated. Herein, we analyzed the potential synergism between CHIKV infection and RA on cytokine and chemokine levels. For this, we compared the IL-1ß, IL-6, IL-10, IL-17A, CCL2, CXCL8, CXCL9 and CXCL10 levels, in addition to rheumatoid factor (RF) and C-reactive protein (CRP), in patients with post-CHIKV chronic arthritis (named CHIKV group), patients with RA (RA group), and patients with previous RA who were later infected by CHIKV (RA-CHIKV). History of CHIKV infection was confirmed by serology (IgG, ELISA). Cytokines/chemokines were quantified by flow cytometry. RF, CRP, age and sex data were obtained from medical records. IL-1ß, IL-6, IL-10 and IL-17A levels were significantly higher in RA-CHIKV compared to the other groups. CXCL8 levels were higher in the CHIKV group than in RA. CXCL9 was higher in CHIKV than in the RA-CHIKV group. CXCL10 was higher in CHIKV than in the other groups. FR levels were higher in RA than in the CHIKV group, and in RA-CHIKV than in CHIKV. No significant difference was observed in CCL2 and CRP, as well as in age and sex. Finally, our findings suggest an interplay between CHIKV infection and RA, which must be analyzed for its possible clinical impact.