PLA2-MjTX-II from Bothrops moojeni snake venom exhibits antimetastatic and antiangiogenic effects on human lung cancer cells.

Phospholipases A2 (PLA2s) from snake venom possess antitumor and antiangiogenic properties. In this study, we evaluated the antimetastatic and antiangiogenic effects of MjTX-II, a Lys49 PLA2 isolated from Bothrops moojeni venom, on lung cancer and endothelial cells. Using in vitro and ex vivo approaches, we demonstrated that MjTX-II reduced cell proliferation and inhibited fundamental processes for lung cancer cells (A549) growth and metastasis, such as adhesion, migration, invasion, and actin cytoskeleton decrease, without significantly interfering with non-tumorigenic lung cells (BEAS-2B). Furthermore, MjTX-II caused cell cycle alterations, increased reactive oxygen species production, modulated the expression of pro- and antiangiogenic genes, and decreased vascular endothelial growth factor (VEGF) expression in HUVECs. Finally, MjTX-II inhibited ex vivo angiogenesis processes in an aortic ring model. Therefore, we conclude that MjTX-II exhibits antimetastatic and antiangiogenic effects in vitro and ex vivo and represents a molecule that hold promise as a pharmacological model for antitumor therapy.

Accuracy of surgeons for predicting radiological sarcopenia in colorectal cancer surgery.

BACKGROUND: This study explored the performance of surgeons for predicting radiological sarcopenia as accessed by psoas cross-sectional area in patients with colorectal cancer (CRC). METHODS: A cross-sectional study was carried out and a diagnostic accuracy strategy was applied using the radiologist team assessment as gold standard. RESULTS: Cohort analysis of 45 consecutive patients found that 31.1% had sarcopenia. Correlation of Total Psoas Index between radiologists and surgeons was very strong for the Junior and strong for the Senior surgeon, with a strong correlation between the surgeons. By the simplistic criterion, agreement between radiologists and surgeons was substantial for both the Junior and Senior surgeons, with a moderate level between the surgeons. Sensitivity, specificity, positive predictive value, negative predictive value, and accuracy of Junior surgeon were 92.9%, 83.9%, 72.2%, 96.3%, and 86.7%, respectively. The corresponding results for the Senior surgeon were 78.6%, 90.3%, 78.6%, 90.3%, and 86.7%, respectively. We found no major differences on agreement levels and performance of surgeons using the composite criterion. CONCLUSIONS: Surgeons seem to be accurate for identifying radiological sarcopenia in patients with CRC. The simplistic criterion should be preferred since a composite criterion adds complexity without increasing accuracy or agreement levels.

Antiangiogenic properties of BthMP, a P-I metalloproteinase from Bothrops moojeni snake venom by VEGF pathway in endothelial cells.

Angiogenesis is a process that is controlled by a delicate combination of proangiogenic and antiangiogenic molecules and can be disrupted in various illnesses, including cancer. Non-cancerous diseases can also have an abnormal or insufficient vascular growth, inflammation and hypoxia, which exacerbate angiogenesis. These conditions include atherosclerosis, psoriasis, endometriosis, asthma, obesity and AIDS. Based on that, the present work assessed the in vitro and ex vivo antiangiogenic properties stemming from BthMP, a P-I metalloproteinase from Bothrops moojeni snake venom, via the VEGF pathway. BthMP at a concentration of 5 and 40 µg/mL showed no toxicity to endothelial cells (HUVEC) in the MTT assay and was not able to induce necrosis and colony proliferation. Interestingly, BthMP inhibited adhesion, migration and invasion of HUVECs in Matrigel and arrested in vitro angiogenesis by reducing the average number of nodules in toxin-treated cells by 9.6 and 17.32 at 5 and 40 µg/mL, respectively, and the number of tubules by 15.9 at 5 µg/mL and 21.6 at 40 µg/mL in a VEGF-dependent way, an essential proangiogenic property. Furthermore, BthMP inhibited the occurrence of the angiogenic process in an ex vivo aortic ring test by decreasing new vessel formation by 52% at 5 µg/mL and by 66% at 40 µg/mL and by increasing the expression of an antiangiogenic gene, SFLT-1, and decreasing the expression of the proangiogenic genes VEGFA and ANGPT-1. Finally, this toxin reduces the production of nitric oxide, a marker that promotes angiogenesis and VEGF modulation, and decreases the protein expression of VEGFA in the supernatant of the HUVEC culture by about 30 %. These results suggest that BthMP has a promising antiangiogenic property and proves to be a biotechnological mechanism for understanding the antiangiogenic responses induced by snake venom metalloproteinases, which could be applied to a variety of diseases that exhibit an imbalance of angiogenesis mechanisms.

Mycoplasma agalactiae Vaccines: Current Status, Hurdles, and Opportunities Due to Advances in Pathogenicity Studies.

Contagious agalactia (CA) is a serious multietiological disease whose classic etiological agent is Mycoplasma agalactiae and which causes high morbidity and mortality rates in infected herds. CA is classified as a notifiable disease by the World Organization for Animal Health due to its significant worldwide economic impact on livestock, primarily involving goat and sheep farms. The emergence of atypical symptoms and strains of M. agalactiae in wildlife ungulates reestablishes its highly plastic genome and is also of great epidemiological significance. Antimicrobial therapy is the main form of control, although several factors, such as intrinsic antibiotic resistance and the selection of resistant strains, must be considered. Available vaccines are few and mostly inefficient. The virulence and pathogenicity mechanisms of M. agalactiae mainly rely on surface molecules that have direct contact with the host. Because of this, they are essential for the development of vaccines. This review highlights the currently available vaccines and their limitations and the development of new vaccine possibilities, especially considering the challenge of antigenic variation and dynamic genome in this microorganism.

Weight-drop model as a valuable tool to study potential neurobiological processes underlying behavioral and cognitive changes secondary to mild traumatic brain injury.

The pathophysiology of post-traumatic brain injury (TBI) behavioral and cognitive changes is not fully understood, especially in its mild presentation. We designed a weight drop TBI model in mice to investigate the role of neuroinflammation in behavioral and cognitive sequelae following mild TBI. C57BL/6 mice displayed depressive-like behavior at 72 h after mild TBI compared with controls, as indicated by a decrease in the latency to first immobility and climbing time in the forced swim test. Additionally, anxiety-like behavior and hippocampal-associated spatial learning and memory impairment were found in the elevated plus maze and in the Barnes maze, respectively. Levels of a set of inflammatory mediators and neurotrophic factors were analyzed at 6 h, 24 h, 72 h, and 30 days after injury in ipsilateral and contralateral hemispheres of the prefrontal cortex and hippocampus. Principal components analysis revealed two principal components (PC), which represented 59.1% of data variability. PC1 (cytokines and chemokines) expression varied between both hemispheres, while PC2 (neurotrophic factors) expression varied only across the investigated brain areas. Our model reproduces mild TBI-associated clinical signs and pathological features and might be a valuable tool to broaden the knowledge regarding mild TBI pathophysiology as well as to test potential therapeutic targets.

Prevalence of Neisseria gonorrhoeae and Chlamydia trachomatis infections among adolescent men who have sex with men and transgender women in Salvador, Northeast Brazil.

Adolescent men who have sex with men (AMSM) and transgender women (ATGW) enrolled as part of the PrEP1519 study between April 2019 and February 2021 in Salvador were tested for Neisseria gonorrhoeae (NG) and Chlamydia trachomatis (CT) infections.We performed real-time polymerase chain reaction using oropharyngeal, anal, and urethral swabs; assessed factors associated with NG and CT infections using multivariable Poisson regression analysis with robust variance; and estimated the prevalence ratios (PRs) and 95% confidence intervals (95% CIs). In total, 246 participants were included in the analyses (median age: 18.8; IQR: 18.2-19.4 years). The overall oropharyngeal, anal, and urethral prevalence rates of NG were 17.9%, 9.4%, 7.6%, and 1.9%, respectively. For CT, the overall, oropharyngeal, anal, and urethral prevalence rates were 5.9%, 1.2%, 2.4%, and 1.9%, respectively. A low level of education, clinical suspicion of STI (and coinfection with Mycoplasma hominis were associated with NG infection. The prevalence of NG and CT, especially extragenital infections, was high in AMSM and ATGW. These findings highlight the need for testing samples from multiple anatomical sites among adolescents at a higher risk of STI acquisition, implementation of school-based strategies, provision of sexual health education, and reduction in barriers to care.

Estimates of life history parameters in a high latitude, arid-country vervet monkey population.

We present data on life history parameters from a long-term study of vervet monkeys in the Eastern Cape, South Africa. Estimates are presented of age at first conception for females and age at natal dispersal for males, along with the probability of survival to adulthood for infants born during the study, female reproductive life-span, reproductive output (including lifetime reproductive success for a subset of females), and inter-birth interval (IBI) duration. We also assess the effect of maternal age and infant survival on length of IBI. We then go on to compare life history parameters for our population with those from two East African populations in Kenya (Amboseli and Laikipia). We find there is broad consensus across the three populations, although mean infant survival was considerably lower for the two East African sites. Such comparisons must be made cautiously, however, as local ecology across the duration of the studies obviously has an impact on the estimates obtained. With this caveat in place, we consider that the concordance between values is sufficient to enable the values reported here to be used in comparative studies of primate life history, although data from habitats with higher rainfall and lower levels of seasonality are needed, and the results presented here should not be seen as canonical.

Potential Biomarkers of impulsivity in mild traumatic brain injury: A pilot study.

Very few studies have investigated cognition and impulsivity following mild traumatic brain injury (mTBI) in the general population. Furthermore, the neurobiological mechanisms underlying post-TBI neurobehavioral syndromes are complex and remain to be fully clarified. Herein, we took advantage of machine learning based-modeling to investigate potential biomarkers of mTBI-associated impulsivity. Twenty-one mTBI patients were assessed within one-month post-TBI and their data were compared to 19 healthy controls on measures of impulsivity (Barratt Impulsiveness Scale - BIS), executive functioning, episodic memory, self-report cognitive failures and blood biomarkers of inflammation, vascular and neuronal damage. mTBI patients were significantly more impulsive than controls in BIS total and subscales. Serum levels of sCD40L, Cathepsin D, IL-4, Neuropilin-1, IFN-α2, and Copeptin were associated with impulsivity in mTBI patients. Besides showing that mTBI are associated with impulsivity in non-military people, we unveiled different pathophysiological pathways potentially implicated in mTBI-related impulsivity.

Effects of 5α-dihydrotestosterone on the modulation of monocyte/macrophage response to Staphylococcus aureus: an in vitro study.

BACKGROUND: Staphylococcus aureus (S. aureus) is a pathogen responsible for a wide range of clinical manifestations and potentially fatal conditions. There is a paucity of information on the influence of androgens in the immune response to S. aureus infection. In this study, we evaluated the influence of the hormone 5α-dihydrotestosterone (DHT) on mouse peritoneal macrophages (MPMs) and human peripheral blood monocytes (HPBMs) induced by S. aureus. METHODS: An in vitro model of MPMs from BALB/c sham males, orchiectomised (OQX) males, and females was used. Cells were inoculated with 10 µL of S. aureus, phage-type 80 or sterile saline (control) for 6 h. The MPMs of OQX males and females were pre-treated with 100 µL of 10-2 M DHT for 24 h before inoculation with S. aureus. The concentration of the cytokines TNF-α, IL-1α, IL-6, IL-8, and IL-10; total nitrites (NO-2); and hydrogen peroxide (H2O2) were measured in the supernatant of MPM cultures. In addition, the toll-like receptor 2 (TLR2) and nuclear factor kappa B (NF-kB) genes that are involved in immune responses were analysed. For the in vitro model of HPBMs, nine men and nine women of childbearing age were selected and HPBMs were isolated from samples of the volunteers' peripheral blood. In women, blood was collected during the periovulatory period. The HPBMs were inoculated with S. aureus for 6 h and the supernatant was collected for the analysis of cytokines TNF-α, IL-6, IL-12; and GM-CSF, NO-2, and H2O2. The HPBMs were then removed for the analysis of 84 genes involved in the host's response to bacterial infections by RT-PCR array. GraphPad was used for statistical analysis with a p value < 0.05. RESULTS: Our data demonstrated that MPMs from sham males inoculated with S. aureus displayed higher concentrations of inflammatory cytokines and lower concentrations of IL-10, NO-2, and H2O2 when compared with MPMs from OQX males and females. A similar result was observed in the HPBMs of men when compared with those of women. Previous treatment with DHT in women HPBMs increased the production of pro-inflammatory cytokines and decreased the levels of IL-10, NO-2, and H2O2. The analysis of gene expression showed that DHT increased the activity of the TLR2 and NF-kB pathways in both MPMs and HPBMs. CONCLUSIONS: We found that DHT acts as an inflammatory modulator in the monocyte/macrophage response induced by S. aureus and females exhibit a better immune defence response against this pathogen.

Prevalence of Mollicutes among men who have sex with men and transgender women aged 15 to 19 years in Salvador, North-eastern Brazil.

BACKGROUND: Some species of Mollicutes have been associated with different pathologies of the urogenital tract in humans, with a high prevalence among adult men who have sex with men (MSM) and transgender women (TGW). However, few studies have been performed to investigate its prevalence among adolescents. In this study, we estimated the initial prevalence of Mycoplasma genitalium (MG), Mycoplasma hominis (MH), Ureaplasma urealyticum (UU), and Ureaplasma parvum (UP); the rate of misdiagnosis at different anatomical sites; and the associated factors with positive tests for Mollicutes among MSM and TGW aged 15 to 19 years enrolled in the PrEP1519 study. METHODS: PrEP-1519 is the first study to investigate the effectiveness of pre-exposure prophylaxis for human immunodeficiency virus among adolescent MSM and TGW aged 15 to 19 in Latin America. Oral, anal, and urethral swabs were taken from 246 adolescents upon enrolment in the study to detect MG, MH, UU, and UP by quantitative polymerase chain reaction (qPCR). Bivariate and multivariate analyses were conducted by Poisson regression and 95% confidence intervals (95% CI) were estimated. RESULTS: The prevalence of Mollicutes was 32.1%. UU was the most prevalent species (20.7%), followed by MH (13.4%), MG (5.7%), and UP (3.2%); 67.3% of the positive samples would have been missed if only urethral samples had been taken. Receptive anal sex (prevalence ratio [PR] = 1.79; 95% CI = 1.07-3.01) and clinical suspicion of sexually transmitted infection (PR = 1.62; 95% CI = 1.01-2.61) were factors associated with the detection of Mollicutes in general. Group sex (PR = 1.98; 95% CI = 1.12-3.50) and receptive anal sex (PR = 2.36; 95% CI = 0.95-5.86) were associated with the detection of Mycoplasma spp. No sociodemographic, clinical, or behavioural variable was significantly associated with the detection of Ureaplasma spp. CONCLUSIONS: A high prevalence of Mollicutes was observed among adolescent MSM and TGW, especially at extragenital sites. Further research is required to understand the epidemiological profile of high-risk adolescents in different regions and contexts, and to investigate the pathogenesis of Mollicutes in the oral and anal mucosa before routine screening can be recommended in clinical practice.

Epidemiological and clinical characteristics of COVID-19 in a Brazilian public hospital.

BACKGROUND: The coronavirus disease 2019 (COVID-19) pandemic has become a major health concern worldwide. In that context, the understanding of epidemiological and clinical features associated with the disease and its severity is crucial for the establishment of strategies aimed at disease control and remedy. AIM: To describe epidemiological features, signs, symptoms, and laboratory findings among severely ill COVID-19 patients from an intensive care unit in northeastern Brazil as well as to evaluate predictor factors for disease outcomes. METHODS: This is a prospective single-center study that evaluated 115 patients admitted to the intensive care unit in a northeastern Brazilian hospital. RESULTS: The patients had a median age of 65.60 ± 15.78 years. Dyspnea was the most frequent symptom, affecting 73.9% of the patients, followed by cough (54.7%). Fever was reported in approximately one-third of patients and myalgia in 20.8% of the patients. At least two comorbidities were found in 41.7% of the patients, and hypertension was the most prevalent (57.3%). In addition, having two or more comorbidities was a predictor of mortality, and lower platelet count was positively associated with death. Nausea and vomiting were two symptoms that were predictors of death, and the presence of a cough was a protective factor. CONCLUSION: This is the first report of a negative correlation between cough and death in severely ill severe acute respiratory syndrome coronavirus 2-infected individuals. The associations between comorbidities, advanced age, and low platelet count and the outcomes of the infection were similar to the results of previous studies, highlighting the relevance of these features.

Prevalence of syphilis and sexual behavior and practices among adolescents MSM and TrTGW in a Brazilian multi-center cohort for daily use of PrEP.

Syphilis has reemerged as a serious public health problem in Brazil and worldwide, disproportionately affecting men who have sex with men (MSM) and travestis and transgender women (TrTGW). Studies on sexually transmitted infections (STI) in adolescents from these key populations are relatively scarce. This is a Brazilian multi-center, cross study with prevalence analysis, using as baseline the PrEP1519 cohort of sexually active MSM and TrTGW adolescents, recruited from April 2019 to December 2020. Analyses were made using the dimensions of vulnerability to STI/HIV and logistic regression models were conducted to estimate the odds ratios of the association between the predictor variables and positive treponemal test for syphilis at the moment of entry in the study. In total, 677 participants were analyzed; participants' median age was 18.9 years (IQR: 18.1-19.5); 70.5% (477) self-declared as black; 70.5% (474), as homosexuals/gays; and 48 (7.1%), as trans women or travestis. The baseline prevalence of syphilis was 21.3%. In the final logistic regression model, higher chance of syphilis was associated with: self-reported episode of STI in the last 12 months (OR = 5.92; 95%CI: 3.74-9.37), sex worker (OR = 3.39; 95%CI: 1.32-8.78), and < 11 years of schooling (OR = 1.76; 95%CI: 1.13-2.74). The prevalence of syphilis among MSM/TrTGW adolescents aged from 15 to 19 years was alarming, much higher than the described for the general population within this age range and associated with vulnerability factors. This reinforces the urgent need to strengthen public health programs to debate about race, gender, sexuality, and prevention.

Transgenic rat with overproduction of ubiquitous angiotensin-(1-7) presents neuroprotection in a model of ischemia and reperfusion.

Recent studies showed that angiotensin-(1-7) has cerebroprotective actions in stroke. In the present study, we aim to test whether tissue overexpression of Angiotensin-(1-7), mainly in the brain provides neuroprotection in a model of ischemia/reperfusion by bilateral common carotid arteries occlusion/reperfusion (BCCAo/R). Evaluation of neurological deficit scores and bilateral asymmetry test (BAT) were performed seven days after transient BCCAo/R in transgenic rats (TG-7371) overexpressing Angiotensin-(1-7) and Sprague-Dawley (SD) rats. To assess blood-brain barrier (BBB) permeability Evans blue dye (EB) was intravenously injected. Cytokine levels were quantified in the whole brain through Elisa assay and oxidative stress was measured 7 days after ischemia. The expression of AT1 and Mas receptors and inducible nitric oxide synthase (iNOS) was evaluated by RT-PCR. Neurological deficits were observed in both SD-BCCAo/R and TG-BCCAo/R, contrasting to sham-operated groups. However, TG-BCCAo/R showed a significant lower neurological score and latency in BAT when compared with SD-BCCAo/R. BBB integrity in TG-BCCAo/R was improved, since these animals showed lower extravasation of EB than SD-BCCAo/R. Interestingly, TG-BCCAo/R presented lower levels of pro-inflammatory cytokines when compared to SD-BCCAo/R. Levels of IL-10 were higher in SD-BCCAo/R than in SD control and even higher in TG-BCCAo/R. TG-BCCAo/R animals presented decreased levels of TBARS and increase in SOD activity and GSH levels when compared to SD sham rats. RT-PCR results showed higher levels of AT1 receptor and iNOS in SD-BCCAo/R compared to TG-BCCAo/R, but no difference was observed for Mas receptor. The present study shows that lifetime increase in cerebral expression of an Ang-(1-7)-producing fusion protein induces neuroprotection in experimental global cerebral ischemia and reperfusion, reassuring that, pharmacological strategies leading to increase in Ang-(1-7) can be an additional tool for stroke therapy.

Prevalence of syphilis and sexual behavior and practices among adolescents MSM and TrTGW in a Brazilian multi-center cohort for daily use of PrEP / Prevalência de sífilis e comportamento e práticas sexuais entre adolescentes HSH e travestis e mulheres transgênero em um estudo de coorte multicêntrico brasileiro sobre uso diário de PrEP / Prevalencia de sífilis, comportamiento sexual y prácticas entre adolescentes HSH y TrTGW en una cohorte multicéntrica brasileña para el uso diario de PrEP

Syphilis has reemerged as a serious public health problem in Brazil and worldwide, disproportionately affecting men who have sex with men (MSM) and travestis and transgender women (TrTGW). Studies on sexually transmitted infections (STI) in adolescents from these key populations are relatively scarce. This is a Brazilian multi-center, cross study with prevalence analysis, using as baseline the PrEP1519 cohort of sexually active MSM and TrTGW adolescents, recruited from April 2019 to December 2020. Analyses were made using the dimensions of vulnerability to STI/HIV and logistic regression models were conducted to estimate the odds ratios of the association between the predictor variables and positive treponemal test for syphilis at the moment of entry in the study. In total, 677 participants were analyzed; participants' median age was 18.9 years (IQR: 18.1-19.5); 70.5% (477) self-declared as black; 70.5% (474), as homosexuals/gays; and 48 (7.1%), as trans women or travestis. The baseline prevalence of syphilis was 21.3%. In the final logistic regression model, higher chance of syphilis was associated with: self-reported episode of STI in the last 12 months (OR = 5.92; 95%CI: 3.74-9.37), sex worker (OR = 3.39; 95%CI: 1.32-8.78), and < 11 years of schooling (OR = 1.76; 95%CI: 1.13-2.74). The prevalence of syphilis among MSM/TrTGW adolescents aged from 15 to 19 years was alarming, much higher than the described for the general population within this age range and associated with vulnerability factors. This reinforces the urgent need to strengthen public health programs to debate about race, gender, sexuality, and prevention.

A sífilis reemergiu enquanto problema sério de saúde pública no Brasil e no mundo, afetando de maneira desproporcional homens que fazem sexo com homens (HSH), travestis e mulheres transgênero. São relativamente escassos os estudos sobre infecções sexualmente transmissíveis (IST) entre adolescentes pertencentes a essas populações-chave. O estudo transversal multicêntrico brasileiro analisou a prevalência de sífilis na linha de base da coorte PrEP15-19 de HSH, travestis e mulheres transgênero adolescentes, sexualmente ativos, recrutados entre abril de 2019 e dezembro de 2020. As análises foram realizadas com as dimensões de vulnerabilidade a ISTs/HIV, e modelos de regressão logística foram construídos para estimar as razões de chances da associação entre as variáveis preditoras e um teste treponêmico positivo para sífilis na entrada do estudo. Foram analisados 677 participantes. A idade mediana era 18,9 anos (IIQ: 18,1-19,5), 70,5% (477) se autoidentificaram como pretos, 70,5% (474) como homossexuais/gays e 48 (7,1%) como mulheres trans ou travestis. A prevalência de sífilis na linha de base era 21,3%. No modelo final de regressão logística, as seguintes variáveis estiveram associadas com chances maiores de sífilis: autorrelato de episódio de IST nos últimos 12 meses (OR = 5,92; IC95%: 3,74-9,37), profissional do sexo (OR = 3,39; IC95%: 1,32-8,78) e menos de 11 anos de escolaridade (OR = 1,76; IC95%: 1,13-2,74). A prevalência de sífilis entre HSH, travestis e mulheres transgênero adolescentes entre 15 e 19 anos de idade foi alarmante, muito acima da taxa relatada na população geral nesta faixa etária, e esteve associada a fatores de vulnerabilidade. Os achados reforçam a necessidade urgente de fortalecer os programas de saúde pública com a discussão sobre raça, gênero, sexualidade e prevenção.

La sífilis ha resurgido como un problema serio de salud pública en Brasil y en todo el mundo, afectando desproporcionadamente a hombres que tienen sexo con hombres (HSH), travestis y mujeres transgénero (TrTGW). Los estudios de las enfermedades trasmitidas sexualmente (ETS) en adolescentes de estas poblaciones clase son relativamente escasos. Se trata de un estudio transversal brasileño multicéntrico, con análisis de prevalencia de la base de referencia de la cohorte PrEP1519 de hombres activos sexualmente que mantienen sexo con hombres y adolescentes TrTGW, reclutados desde abril de 2019 a diciembre de 2020. Se hicieron análisis, usando las dimensiones de vulnerabilidad a las ETS/VIH, y se realizaron modelos de regresión logística para estimar las odds ratios de la asociación entre las variables predictoras y la prueba treponémica positiva para la sífilis al comenzar el estudio. Se analizaron a 677 participantes. La media de edad fue 18,9 años (IQR: 18,1-19,5), 70,5% (477) se autodeclararon como negros, 70,5% (474) como homosexuales/gays y 48 (7,1%) como mujeres trans o travestis. La base de referencia de prevalencia de sífilis fue 21,3%. En el modelo final de regresión logística, se asociaron con una posibilidad más alta de sífilis: un episodio autoinformado de ETS en los últimos 12 meses (OR = 5,92; IC95%: 3,74-9,37), trabajadores sexuales (OR = 3,39; IC95%: 1,32-8,78) y < 11 años de estudio (OR = 1,76; IC95%: 1,13-2,74). La prevalencia de sífilis entre adolescentes HSH/TrTGW con edades de 15 a 19 años fue alarmante, mucho más que lo descrito para la población general en este rango de edad y asociado con factores de vulnerabilidad. Esto refuerza la urgente necesidad de fortalecer los programas de salud pública, discutiendo cuestiones de raza, género, sexualidad y prevención.

Prevalence of syphilis and sexual behavior and practices among adolescents MSM and TrTGW in a Brazilian multi-center cohort for daily use of PrEP / Prevalência de sífilis e comportamento e práticas sexuais entre adolescentes HSH e travestis e mulheres transgênero em um estudo de coorte multicêntrico brasileiro sobre uso diário de PrEP / Prevalencia de sífilis, comportamiento sexual y prácticas entre adolescentes HSH y TrTGW en una cohorte multicéntrica brasileña para el uso diario de PrEP

Syphilis has reemerged as a serious public health problem in Brazil and worldwide, disproportionately affecting men who have sex with men (MSM) and travestis and transgender women (TrTGW). Studies on sexually transmitted infections (STI) in adolescents from these key populations are relatively scarce. This is a Brazilian multi-center, cross study with prevalence analysis, using as baseline the PrEP1519 cohort of sexually active MSM and TrTGW adolescents, recruited from April 2019 to December 2020. Analyses were made using the dimensions of vulnerability to STI/HIV and logistic regression models were conducted to estimate the odds ratios of the association between the predictor variables and positive treponemal test for syphilis at the moment of entry in the study. In total, 677 participants were analyzed; participants' median age was 18.9 years (IQR: 18.1-19.5); 70.5% (477) self-declared as black; 70.5% (474), as homosexuals/gays; and 48 (7.1%), as trans women or travestis. The baseline prevalence of syphilis was 21.3%. In the final logistic regression model, higher chance of syphilis was associated with: self-reported episode of STI in the last 12 months (OR = 5.92; 95%CI: 3.74-9.37), sex worker (OR = 3.39; 95%CI: 1.32-8.78), and < 11 years of schooling (OR = 1.76; 95%CI: 1.13-2.74). The prevalence of syphilis among MSM/TrTGW adolescents aged from 15 to 19 years was alarming, much higher than the described for the general population within this age range and associated with vulnerability factors. This reinforces the urgent need to strengthen public health programs to debate about race, gender, sexuality, and prevention.

A sífilis reemergiu enquanto problema sério de saúde pública no Brasil e no mundo, afetando de maneira desproporcional homens que fazem sexo com homens (HSH), travestis e mulheres transgênero. São relativamente escassos os estudos sobre infecções sexualmente transmissíveis (IST) entre adolescentes pertencentes a essas populações-chave. O estudo transversal multicêntrico brasileiro analisou a prevalência de sífilis na linha de base da coorte PrEP15-19 de HSH, travestis e mulheres transgênero adolescentes, sexualmente ativos, recrutados entre abril de 2019 e dezembro de 2020. As análises foram realizadas com as dimensões de vulnerabilidade a ISTs/HIV, e modelos de regressão logística foram construídos para estimar as razões de chances da associação entre as variáveis preditoras e um teste treponêmico positivo para sífilis na entrada do estudo. Foram analisados 677 participantes. A idade mediana era 18,9 anos (IIQ: 18,1-19,5), 70,5% (477) se autoidentificaram como pretos, 70,5% (474) como homossexuais/gays e 48 (7,1%) como mulheres trans ou travestis. A prevalência de sífilis na linha de base era 21,3%. No modelo final de regressão logística, as seguintes variáveis estiveram associadas com chances maiores de sífilis: autorrelato de episódio de IST nos últimos 12 meses (OR = 5,92; IC95%: 3,74-9,37), profissional do sexo (OR = 3,39; IC95%: 1,32-8,78) e menos de 11 anos de escolaridade (OR = 1,76; IC95%: 1,13-2,74). A prevalência de sífilis entre HSH, travestis e mulheres transgênero adolescentes entre 15 e 19 anos de idade foi alarmante, muito acima da taxa relatada na população geral nesta faixa etária, e esteve associada a fatores de vulnerabilidade. Os achados reforçam a necessidade urgente de fortalecer os programas de saúde pública com a discussão sobre raça, gênero, sexualidade e prevenção.

La sífilis ha resurgido como un problema serio de salud pública en Brasil y en todo el mundo, afectando desproporcionadamente a hombres que tienen sexo con hombres (HSH), travestis y mujeres transgénero (TrTGW). Los estudios de las enfermedades trasmitidas sexualmente (ETS) en adolescentes de estas poblaciones clase son relativamente escasos. Se trata de un estudio transversal brasileño multicéntrico, con análisis de prevalencia de la base de referencia de la cohorte PrEP1519 de hombres activos sexualmente que mantienen sexo con hombres y adolescentes TrTGW, reclutados desde abril de 2019 a diciembre de 2020. Se hicieron análisis, usando las dimensiones de vulnerabilidad a las ETS/VIH, y se realizaron modelos de regresión logística para estimar las odds ratios de la asociación entre las variables predictoras y la prueba treponémica positiva para la sífilis al comenzar el estudio. Se analizaron a 677 participantes. La media de edad fue 18,9 años (IQR: 18,1-19,5), 70,5% (477) se autodeclararon como negros, 70,5% (474) como homosexuales/gays y 48 (7,1%) como mujeres trans o travestis. La base de referencia de prevalencia de sífilis fue 21,3%. En el modelo final de regresión logística, se asociaron con una posibilidad más alta de sífilis: un episodio autoinformado de ETS en los últimos 12 meses (OR = 5,92; IC95%: 3,74-9,37), trabajadores sexuales (OR = 3,39; IC95%: 1,32-8,78) y < 11 años de estudio (OR = 1,76; IC95%: 1,13-2,74). La prevalencia de sífilis entre adolescentes HSH/TrTGW con edades de 15 a 19 años fue alarmante, mucho más que lo descrito para la población general en este rango de edad y asociado con factores de vulnerabilidad. Esto refuerza la urgente necesidad de fortalecer los programas de salud pública, discutiendo cuestiones de raza, género, sexualidad y prevención.

ß-caryophyllene and docosahexaenoic acid, isolated or associated, have potential antinociceptive and anti-inflammatory effects in vitro and in vivo.

Inflammation is a complex biological response involving the immune, autonomic, vascular, and somatosensory systems that occurs through the synthesis of inflammatory mediators and pain induction by the activation of nociceptors. Staphylococcus aureus, the main cause of bacteremia, is one of the most common and potent causes of inflammation in public health, with worse clinical outcomes in hospitals. Antioxidant substances have been evaluated as alternative therapeutic analgesics, antioxidants, anti-inflammatory agents, antitumor agents, and bactericides. Among these, we highlight the essential oils of aromatic plants, such as ß-caryophyllene (BCP), and polyunsaturated fatty acids, such as docosahexaenoic acid (DHA). The objective of this study was to evaluate the biological activities of BCP-DHA association in in vitro and in vivo experimental models of antinociception and inflammation. To determine the anti-inflammatory effects, monocytes isolated from the peripheral blood of adult male volunteers were infected with methicillin-resistant S. aureus and incubated with treatment for cytokine dosage and gene expression analysis. Antinociceptive effects were observed in the three models when comparing the control (saline) and the BCP-DHA treatment groups. For this purpose, the antinociceptive effects were evaluated in animal models using the following tests: acetic acid-induced abdominal writhing, paw edema induced by formalin intraplantar injection, and von Frey hypernociception. There was a significant reduction in the GM-CSF, TNFα, IL-1, IL-6, and IL-12 levels and an increase in IL-10 levels in the BCP-DHA treatment groups, in addition to negative regulation of the expression of the genes involved in the intracellular inflammatory signaling cascade (IL-2, IL-6, IRF7, NLRP3, and TYK2) in all groups receiving treatment, regardless of the presence of infection. Statistically significant results (p < 0.05) were obtained in the acetic acid-induced abdominal writhing test, evaluation of paw edema, evaluation of paw flinching and licking in the formalin intraplantar injection model, and the von Frey hypernociception test. Therefore, BCP and DHA, either administered individually or combined, demonstrate potent anti-inflammatory and antinociceptive effects.

Mycoplasma hominis Causes DNA Damage and Cell Death in Primary Human Keratinocytes.

Mycoplasma hominis can be isolated from the human urogenital tract. However, its interaction with the host remains poorly understood. In this study, we aimed to assess the effects of M. hominis infection on primary human keratinocytes (PHKs). Cells were quantified at different phases of the cell cycle. Proteins involved in cell cycle regulation and apoptosis progression were evaluated. The expression of genes encoding proteins that are associated with the DNA damage response and Toll-like receptor pathways was evaluated, and the cytokines involved in inflammatory responses were quantified. A greater number of keratinocytes were observed in the Sub-G0/G1 phase after infection with M. hominis. In the viable keratinocytes, infection resulted in G2/M-phase arrest; GADD45A expression was increased, as was the expression of proteins such as p53, p27, and p21 and others involved in apoptosis regulation and oxidative stress. In infected PHKs, the expression of genes associated with the Toll-like receptor pathways showed a change, and the production of IFN-γ, interleukin (IL) 1ß, IL-18, IL-6, and tumour necrosis factor alpha increased. The infection of PHKs by M. hominis causes cellular damage that can affect the cell cycle by activating the response pathways to cellular damage, oxidative stress, and Toll-like receptors. Overall, this response culminated in the reduction of cell proliferation/viability in vitro.

Effects of physical training on physical and functional fitness, physical activity level, endothelial function, hemodynamic variables, bone metabolism, and quality of life of post-bariatric patients: study protocol for a randomized controlled trial.

BACKGROUND: Evidence of the benefits induced from resistance exercise on health markers of post-bariatric patients is limited. The study will investigate the effects of a resistance training (RT) program on muscle mass and strength, bone metabolism biomarkers, bone mineral density (BMD), bone microarchitecture, and endothelial function of patients subjected to Roux-en-Y gastric bypass. METHODS/DESIGN: This randomized controlled trial will include 60 post-bariatric patients, physically inactive, aging 18 to 50 years, with a post-surgery period ≥ 12 months. They will be randomly assigned into two groups: (i) the non-exercised control group, which will receive the standard clinical follow-up, or (ii) the intervention group which will consist of RT (60 min/session; 3 times/week, for 6 months). The primary outcomes will include muscle mass and strength, bone metabolism biomarkers, BMD, and bone microarchitecture. The secondary outcomes will be anthropometry, hemodynamic measurements, cardiovascular risk factors, health-related quality of life (QoL), and endothelial function. Outcomes will be assessed by blood biomarkers of bone formation and reabsorption, dual X-ray absorptiometry, repetition maximum and handgrip strength tests, high-resolution peripheral quantitative computed tomography, 36-Item Short-Form Health Survey, venous occlusion plethysmography, and nailfold videocapillaroscopy. DISCUSSION: It is expected that there are greater benefits from the RT program, possibly improving muscle mass and strength, bone metabolism, density and microarchitecture, QoL, and cardiovascular risk. TRIAL REGISTRATION: ClinicalTrials.gov NCT04193397. Registered on 7 December 2019.

Perfil epidemiológico e clínico de crianças hospitalizadas com cardiopatias congênitas / Perfil epidemiológico y clínico de niños hospitalizados con cardiopatias congénitas / Clinical and epidemiological profile of hospitalized children with congenital heart diseases

Objetivo: Descrever o perfil epidemiológico e clínico de crianças com cardiopatias congênitas admitidas entre 2018 e 2019 em um hospital de referência em Pernambuco. Métodos: Trata-se de um corte transversal envolvendo 310 crianças com cardiopatias congênitas. Foram obtidos dados epidemiológicos e clínicos em prontuários através de formulários padronizados. Houve tabulação em planilha Excel e análise estatística descritiva por meio do Software SPSS 25. Resultados: Verificou-se média de 21,69 meses de idade e predominância do sexo masculino (55,5%). Os principais fatores de risco maternos foram infecção durante a gestação (21,3%) e idade avançada (15,8%). Dentre as doenças crônicas, destacaram-se hipertensão arterial (6,1%) e diabetes mellitus (4,2%). Os predisponentes do paciente foram prematuridade (16,1%), baixo peso ao nascer (17,7%), trissomia do 21 (17,7%) e malformações extracardíacas (7,1%). Sinais e sintomas respiratórios constituíram o principal motivo de hospitalização, sendo registradas dispneia (55,8%), tosse (30,3%) e alterações de ausculta pulmonar (16,1%). Também motivou o internamento a presença de cianose (20,3%). O sopro cardíaco se apresentou na maioria dos pacientes (80,0%). Em percentual relevante dos casos, o diagnóstico ocorreu durante a hospitalização (16,8%). Conclusão: O conhecimento acerca do perfil das cardiopatias congênitas auxilia o diagnóstico, sendo necessária a ampliação do conhecimento científico nesta temática... (AU)

Objetivo: Describir el perfil epidemiológico y clínico de niños con cardiopatías congénitas ingresados entre 2018 y 2019 en un hospital de referencia de Pernambuco. Métodos: estudio transversal con 310 niños con cardiopatías congénitas. Los datos epidemiológicos y clínicos se obtuvieron de las historias clínicas mediante formularios estandarizados. Se realizó tabulación en planilla de Excel y análisis estadístico descriptivo con el Software SPSS 25. Resultados: La edad media fue 21,69 meses y predominio del sexo masculino (55,5%). Los principales factores de riesgo maternos fueron infección durante el embarazo (21,3%) y edad avanzada (15,8%). Las principales enfermedades crónicas fueron hipertensión arterial (6,1%) y diabetes mellitus (4,2%). Los predisponentes del paciente fueron prematuridad (16,1%), bajo peso al nacer (17,7%), trisomía 21 (17,7%) y malformaciones extracardiacas (7,1%). Signos y síntomas respiratorios fueron el principal motivo de hospitalización, con disnea (55,8%), tos (30,3%) y alteraciones en la auscultación pulmonar (16,1%). Cianosis (20,3%) también motivó la hospitalización. El soplo cardíaco estuvo presente en la mayoría de los pacientes (80,0%). En un porcentaje relevante de casos, el diagnóstico se produjo durante la hospitalización (16,8%). Conclusión: El conocimiento sobre el perfil de las cardiopatías congénitas ayuda al diagnóstico, siendo necesario ampliar el conocimiento científico sobre este tema... (AU)

Objective: Describe the clinical and epidemiological profile of children with congenital heart diseases admitted between 2018 and 2019 to a referencial hospital in Pernambuco. Methods: Cross-sectional study involving 310 children with congenital cardiopathy. The data was obtained in the medical charts, using standardized forms. Tabulation was made in an Excel spreadsheet and descriptive statistical analysis done through SPSS 25 Software. Results: The average age was 21,69 months and most patients were male (55,5%). The main risk factors were infection during pregnancy (21,3%) and advanced age (15,8%). Among chronic diseases, hypertension (6,1%) and diabetes mellitus (4,2%) stood out. Predisposing factors related to the patient were prematurity (16,1%), low weight at birth (17,7%), trisomy 21 (17,7%) and extracardiac malformations (7,1%). Respiratory signs and symptoms were the main cause of hospitalization, such as dyspnea (55,8%), cough (30,3%) and changes in pulmonary auscultation (16,1%). Cyanosis also motivated admission (20,3%). Most patients presented heart murmur (80%). In a significant amount of cases, the diagnosis was made during the hospital admission (16,8%). Conclusion: the awareness about the profile of congenital heart diseases helps the diagnosis, and is necessary to expand scientific knowledge on this topic... (AU)

Heterologous Expression, Purification, and Immunomodulatory Effects of Recombinant Lipoprotein GUDIV-103 Isolated from Ureaplasma diversum.

Ureaplasma diversum is a bacterial pathogen that infects cattle and can cause severe inflammation of the genital and reproductive systems. Lipid-associated membrane proteins (LAMPs), including GUDIV-103, are the main virulence factors in this bacterium. In this study, we heterologously expressed recombinant GUDIV-103 (rGUDIV-103) in Escherichia coli, purified it, and evaluated its immunological reactivity and immunomodulatory effects in bovine peripheral blood mononuclear cells (PBMCs). Samples from rabbits inoculated with purified rGUDIV-103 were analysed using indirect enzyme-linked immunosorbent assay and dot blotting to confirm polyclonal antibody production and assess kinetics, respectively. The expression of this lipoprotein in field isolates was confirmed via Western blotting with anti-rGUDIV-103 serum and hydrophobic or hydrophilic proteins from 42 U. diversum strains. Moreover, the antibodies produced against the U. diversum ATCC 49783 strain recognised rGUDIV-103. The mitogenic potential of rGUDIV-103 was evaluated using a lymphoproliferation assay in 5(6)-carboxyfluorescein diacetate succinimidyl ester−labelled bovine PBMCs, where it induced lymphocyte proliferation. Quantitative polymerase chain reaction analysis revealed that the expression of interleukin-1ß, toll-like receptor (TLR)-α, TLR2, TLR4, inducible nitric oxide synthase, and caspase-3−encoding genes increased more in rGUDIV-103−treated PBMCs than in untreated cells (p < 0.05). Treating PBMCs with rGUDIV-103 increased nitric oxide and hydrogen peroxide levels. The antigenic and immunogenic properties of rGUDIV-103 suggested its suitability for immunobiological application.