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Anal squamous cell carcinoma (ASCC) is a rare gastrointestinal malignancy linked to high-risk human papillomavirus (HPV) infection, which develops from precursor lesions like low-grade squamous intraepithelial lesions and high-grade squamous intraepithelial lesions (HGSILs). ASCC incidence varies across populations and poses increased risk for people living with HIV. Our investigation focused on transcriptomic and metatranscriptomic changes from squamous intraepithelial lesions to ASCC. Metatranscriptomic analysis highlighted specific bacterial species (e.g., Fusobacterium nucleatum, Bacteroides fragilis) more prevalent in ASCC than precancerous lesions. These species correlated with gene-encoding enzymes (Acca, glyQ, eno, pgk, por) and oncoproteins (FadA, dnaK), presenting potential diagnostic or treatment markers. Unsupervised transcriptomic analysis identified distinct sample clusters reflecting histological diagnosis, immune infiltrate, HIV/HPV status, and pathway activities, recapitulating anal cancer progression's natural history. Our study unveiled molecular mechanisms in anal cancer progression, aiding in stratifying HGSIL cases based on low or high risk of progression to malignancy.

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A follow-up study was designed to assess correlations among physical signs, quality of sleep, common mental symptoms, and health-related quality of life after moderate to severe COVID-19 pneumonia. Daily changes in dyspnoea and pulse oximetry were recorded (200 days), and four evaluations (in >2 years) were performed on quality of sleep, mental symptoms, cognitive performance, and health-related quality of life. In a single center, 72 adults participated in the study (52.5 ± 13.7 years old), with no psychiatry/neurology/chronic lung/infectious diseases, chronic use of corticosteroids/immunosuppressive therapy, or pregnancy. Daily agendas showed delayed decreases in dyspnoea scores compared to pulse oximetry and heart rate recordings; however, changes in pulse oximetry were minimal. Slight changes in cognitive performance were related to the general characteristics of the participants (obesity and tobacco use) and with the severity of acute disease (MANCOVA, p < 0.001). Health-related quality of life gradually improved (MANCOVA, p < 0.004). During recovery, bad quality of sleep and mental symptoms (mainly attention/concentration) contributed to the subscores on health perception and vitality in the health-related quality of life assessment. Early mental support services including sleep hygiene could be beneficial during rehabilitation after acute COVID-19.

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En el apasionante campo de la medicina, la constante innovación y el continuo cuestionamiento son fundamentales para impulsar el progreso. En este contexto, la biopsia de ganglio centinela, una técnica revolucionaria en su momento para el tratamiento del cáncer de mama, se encuentra desde hace varios años bajo escrutinio. ¿Es realmente necesario? ¿Podrían las imágenes ser clave para reemplazar la cirugía en esta área?. Hace 12 años, el destacado investigador italiano Oreste Gentilini y su equipo plantearon estas hipótesis al iniciar el ensayo SOUND, estudio que surge en medio de la agitación generada por el ensayo Z0011 y el fuerte cuestionamiento a la utilidad de la biopsia de ganglio centinela.

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Introducción: La conservación mamaria ha evolucionado y cada vez se utilizan más técnicas oncoplásticas para obtener mejores resultados cosméticos. Además, esta técnica permite escisiones más amplias que previenen deformidades mamarias mediante la reconstrucción de grandes defectos de resección. Objetivo: Reportar con un caso clínico: estrategia quirúrgica de una paciente con cáncer de mama multicéntrico y cirugía conservadora oncoplástica de la mama. Caso clínico: Paciente de 72 años con mamas grandes ptosis Grado III con diagnóstico de carcinoma mamario derecho multicéntrico Estadio IA mT1cNO luminal A anatómico - pronóstico. Deseos de la paciente de conservar la mama. Se decide mastoplastía terapéutica + Ganglio centinela (GC) + mastopexia y reducción contralateral. Anatomía patológica: mama derecha: carcinoma ductal infiltrante multicéntrico GC 0/3. Mama izquierda: 1 foco de 2 mm carcinoma lobulillar infiltrante de tipo clásico score II de nottingham. margen libre. Inmunohistoquimica: RE 95%, RP 95%, Her2 neu negativo score 0 y ki67 2%. Se discute caso en unidad de mastología, se decide: Radioterapia 3D bilateral y hormonoterapia con anastrazole. Discusión: La Mastoplastia terapéutica es considerada una opción de tratamiento estándar para pacientes seleccionados garantizando la conservación mamaria con seguridad oncológica aceptable, adecuados resultados estéticos y similar supervivencia. Permite la escisión tumoral con márgenes de resección más amplios y resultados oncológicos y estéticos aceptables. Creemos que es esencial brindar información precisa para ayudar a la paciente en la toma de decisiones sobre las consecuencias específicas de cualquier técnica oncoplástica. Conclusiones: La oncoplastia extrema debe ser utilizada solamente para casos seleccionados. Deberá ser evaluado por un equipo multidisicplinario, idealmente en el contexto de una unidad de mastología integrada por: cirujanos mastólogos, radioterapeutas, imagenólogos, oncólogos, anatomopatólogos y psicooncólogos. La técnica quirúrgica debe ser realizada preferentemente por cirujanos de mama con formación oncoplástica y reconstructiva de la mama(AU)

Introduction: Breast conservation has evolved and more oncoplastic techniques are used to obtain better cosmetic results. In addition, this technique allows wider excisions that prevents breast deformities by reconstructing large resection defects. Objetivo: Report with a clinical case: surgical strategy of multicentric breast cancer and oncoplastic breast-conservative surgery. Clinical case: A 72-year-old patient with large breasts with Grade III ptosis diagnosed with multicentric right mammary carcinoma Stage IA mT1cNO luminal A anatomical - prognosis. The patient's wishes to preserve the breast. Therapeutic mastoplasty + sentinel node (SLN) + mastopexy and contralateral reduction was decided. Pathology: right breast: multicentric infiltrating ductal carcinoma GC 0/3. Left breast: 1 focus of 2-mm infiltrating lobular carcinoma of the classic Nottingham score II type. free margin. Inmunohystochemistry: RE 95%, RP 95%, Her2 neu negative score 0 and ki67 2%. The case is discussed in the mastology unit, and we decided: Bilateral 3D radiotherapy and hormone therapy with anastrozole. Discussion: Therapeutic mastoplasty is considered a standard treatment option for selected patients, guaranteeing breast conservation with acceptable oncological safety, adequate aesthetic results and similar survival. It allows tumor excision with wider resection margins and acceptable oncological and cosmetic results. We believe that it is to provide accurate information to help the patient in making essential decisions about the specific consequences of any oncoplastic technique. Conclusions: Extreme oncoplasty should only be used for selected cases. It must be evaluated by a multidisciplinary team, ideally in the context of a mastology unit made up of: breast surgeons, radiotherapists, imaging specialists, oncologists, pathologists and psycho-oncologists. The surgical technique should preferably be performed by breast surgeons with oncoplastic and reconstructive training of the breast(AU)

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After a time away from the classrooms and laboratories due to the global pandemic, the return to teaching activities during the semester represented a challenge to both teachers and students. Our particular situation in a Microbial Physiology course was the necessity of imparting in shorter time, laboratory practices that usually take longer. This article describes a 2-week-long laboratory exercise that covers several concepts in an interrelated way: conjugation as a gene transfer mechanism, regulation of microbial physiology, production of secondary metabolites, degradation of macromolecules, and biofilm formation. Utilizing a Quorum Quenching (QQ) strategy, the Quorum Sensing (QS) system of Pseudomonas aeruginosa is first attenuated. Then, phenotypes regulated by QS are evidenced. QS is a regulatory mechanism of microbial physiology that relies on signal molecules. QS is related in P. aeruginosa to several virulence factors, some of which are exploited in the laboratory practices presented in this work. QQ is a phenomenon by which QS is interrupted or attenuated. We utilized a QQ approach based on the enzymatic degradation of the P. aeruginosa QS signals to evidence QS-regulated traits that are relevant to our Microbial Physiology course. Results obtained with the same test performed by a random group of students before and after the activities show the positive effectiveness of the approach presented in this work.

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IMPORTANCE: Return to sport (RTS) is considered an indicator of successful recovery after anterior cruciate ligament reconstruction (ACLR). In recent years, there has been major interest in documenting RTS following anterior cruciate ligament (ACL) injury. Despite women being at increased risk for ACL injuries and a global increase in women's participation in sports, research has not adequately focused on female athletes. OBJECTIVE: The purpose of this study is to conduct a systematic review and meta-analysis evaluating the RTS rate in female athletes after ACLR. We hypothesize that most of the female athletes can RTS. EVIDENCE REVIEW: A systematic review was conducted following the Preferred Reporting Items for Systematic Reviews and Meta-analyses (PRISMA) guidelines. Electronic databases (PubMed, Embase, and Epistemonikos) were searched for articles reporting RTS rates and contextual data in female athletes. The following search terms were used: "anterior cruciate ligament reconstruction" OR "ACL reconstruction" AND "female" OR "women" AND "return to sports" OR "return to play" to retrieve all relevant articles published between 2003 and 2023. A quality assessment of the included studies was conducted. FINDINGS: Fifteen articles were included, reporting on 1456 female athletes participating in pivoting sports. The included studies comprised 9 cohorts, 1 case-control study, 2 case series, 2 descriptive epidemiology studies, and 1 observational study. Eight out of fifteen studies focused solely on elite-level athletes. The participants had a mean age of 23.13 years. Soccer was the most prevalent sport among the participants, accounting for 49.7% of all athletes included. All 15 studies reported an RTS rate, yielding a meta-proportion of 69% [95% CI, 58-80%] for RTS. Nine articles reported the average time to RTS, which was 10.8 months [95% CI, 8.7-12.8 months]. CONCLUSIONS: This systematic review demonstrates that a majority of female athletes (69 â€‹%) can RTS participation at an average of 10.8 months, however, the available information is insufficient, and quantitative data and reasons for not returning to play are lacking. Future studies should establish return-to-play criteria in this population and determine reasons for not returning to play. LEVEL OF EVIDENCE: III.

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BACKGROUND: Maternal overweight and obesity have been associated with an increased risk of atopic dermatitis (AD) in the offspring, but the underlying mechanisms are unclear. Vernix caseosa (VC) is a proteolipid material covering the fetus produced during skin development. However, whether maternal prepregnancy weight excess influences fetal skin development is unknown. Characterizing the VC of newborns from mothers with prepregnancy overweight and obesity might reveal AD-prone alterations during fetal skin development. OBJECTIVE: We sought to explore AD biomarkers and staphylococcal loads in VC from the offspring of mothers who were overweight/obese (O/O) before pregnancy versus in those from offspring of normal weight mothers. METHODS: The VC of newborns of 14 O/O and 12 normal weight mothers were collected immediately after birth. Biomarkers were determined by ELISA and staphylococcal species by quantitative PCR. RESULTS: The VC from the O/O group showed decreased expression of skin barrier proteins (filaggrin and loricrin) and increased levels of proinflammatory biomarkers (IgA, thymic stromal lymphopoietin [TSLP], S100A8, IL-25, and IL-33). No differences in concentrations of antimicrobial peptides and enzymes were detected. The VC from the O/O group had a lower Staphylococcus epidermidis and Staphylococcus hominis commensal bacterial load, whereas Staphylococcus aureus bacterial load was not significantly different between the 2 groups. Maternal body mass index was negatively correlated with VC filaggrin expression and S epidermidis load and was positively associated with TSLP concentration. One-year follow-up established that the offspring of O/O mothers had a higher incidence of AD that was specifically linked with decreased VC filaggrin expression and lower S epidermidis load. CONCLUSIONS: VC from neonates of mothers with prepregnancy overweight and obesity exhibit skin barrier molecular alterations and staphylococcal dysbiosis that suggest early mechanistic clues to this population's increased risk of AD.

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During the COVID-19 pandemic, the importance of vaccinating children against SARS-CoV-2 was rapidly established. This study describes the safety of CoronaVac® in children and adolescents between 3- and 17-years-old in a multicenter study in Chile with two vaccine doses in a 4-week interval. For all participants, immediate adverse events (AEs), serious AEs (SAEs), and AEs of special interest (AESIs) were registered throughout the study. In the safety subgroup, AEs were recorded 28 days after each dose. COVID-19 surveillance was performed throughout the study. A total of 1139 individuals received the first and 1102 the second dose of CoronaVac®; 835 were in the safety subgroup. The first dose showed the highest number of AEs: up to 22.2% of participants reported any local and 17.1% systemic AE. AEs were more frequent in adolescents after the first dose, were transient, and mainly mild. Pain at the inoculation site was the most frequent AE for all ages. Fever was the most frequent systemic AE for 3-5 years old and headache in 6-17 years old. No SAEs or AESIs related to vaccination occurred. Most of the COVID-19 cases were mild and managed as outpatients. CoronaVac® was safe and well tolerated in children and adolescents, with different safety patterns according to age.

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RESUMEN Introducción: Desde el inicio de la pandemia, México fue de los países que presentó tasas de mortalidad más altas por COVID 19. Objetivo: Determinar si la diabetes mellitus tipo 2, la hipertensión arterial y la obesidad incrementan la tasa de mortalidad en pacientes con diagnóstico de COVID-19 que requirieron hospitalización en México. Métodos: Revisión sistemática en Pubmed MeSH, Web of Science, Lilas, Scielo y Google Scholar con los términos MeSH "COVID-19", "SARS-COV2", "Coronavirus", y "México" durante los años 2020 y 2021, incluyendo artículos en inglés y español. Para el proceso de selección de artículos, dos revisores seleccionaron los estudios mientras que otros dos revisores adicionales participaron en el análisis de dichos estudios. Resultados: Se incluyeron 73 estudios realizados en México del 2020 al 2021 con información obtenida a través de las bases de datos del Sistema Nacional de Vigilancia Epidemiológica de México. Se incluyeron pacientes con un promedio de edad de 52,9 años ±13,27, el 64% de los pacientes incluidos fueron mujeres, se reportó una tasa de mortalidad de 6.76% (Min-Max 0.77-73.73%). El 71% de los estudios (52), no reportaron la mortalidad específica relacionada con las comorbilidades. La patología más prevalente fue la obesidad con un 24.23% (Min-Max 11.50-71.00%), seguida de la hipertensión arterial con un 22.23% (Min-Max 2.0-53.96%) y finalmente la diabetes mellitus tipo 2 con un 18.10% (Min-Max 1.83-40.00%). Conclusión: La comorbilidad más común entre los pacientes hospitalizados por COVID 19 en México fue la obesidad, seguida de la diabetes mellitus tipo 2 y por último la hipertensión.

ABSTRACT Introduction: Since the start of the pandemic, Mexico was one of the countries with the highest mortality rates from COVID 19. Objective: To determine if type 2 diabetes mellitus, arterial hypertension, and obesity increase mortality in patients diagnosed with COVID-19 who required hospitalization in Mexico. Methods: Systematic review in Pubmed MeSH, Web of Science, Lilas, Scielo, and Google Scholar with the terms MeSH COVID-19, SARS-COV2, Coronavirus, and Mexico for the years 2020 and 2021, in English or Spanish. Two reviewers selected the studies, two additional reviewers participated in the analysis of the studies. Results: Seventy three studies carried out in Mexico from 2020 to 2021 were included with information obtained from the databases of the National Epidemiological Surveillance System of Mexico. With an average age of 52.9 ± 13.27 years, 64% of the included patients were women, in general, a mortality rate of 16.76% (Min-Max 0.77-73.73%) was reported. 71% of the studies (52) did not report specific mortality related to comorbidities the most prevalent pathology was obesity with 24.23% (Min-Max 11.50-71.00%), followed by arterial hypertension 22.23% (Min-Max 2.0-53.96%) and finally Diabetes mellitus with 18.10% (Min-Max 1.83-40.00%). Conclusion: The most common comorbidity among patients hospitalized for COVID in Mexico was obesity, followed by type 2 diabetes mellitus and hypertension.

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Antecedentes: La terapia dual ha surgido como un nuevo concepto para el tratamiento del VIH. Este estudio tenía como objetivo comparar un régimen dual basado en ATV/r + RAL (TD) frente a estándar de tres drogas con ATV/r + TDF/FTC (TT) luego del fracaso de un primer esquema ba-sado en INNTR.ClinicalTrials.gov, Número: NCT01829802.Método: Estudio piloto abierto, multicéntrico y aleatoriza-do. Resultado primario: proporción de sujetos con ARN del VIH-1 menor a 50 copias/mL en semana 48 (S48). Resulta-dos secundarios: discontinuaciones asociadas a eventos adversos (EA), tiempo transcurrido hasta la supresión viral, desarrollo de mutaciones de resistencia a la integrasa y proteasa, cambio en recuento de CD4. Resultados: De los 57 participantes seleccionados, 34 fue-ron asignados aleatoriamente para recibir: TD (n: 18) o TT (n: 16). En semana 48, 67% (n: 12/18) en TD tuvo respues-ta virológica y 88% (n: 14/16) en rama según el análisis FDA, intención de tratamiento/expuestos (p = NS) y 73% (TD) y 93% (TT) según análisis por protocolo (p = NS). El cambio de CD4 entre basal - S48: +119 y +52 células/µL en DT y TT, respectivamente. Cuatro participantes en TD y uno en TT presentaron fracaso virológico en la semana 48. Un participante desarrolló una mutación de resistencia a integrasa (155H).Conclusión: ATV/r+RAL como terapia dual de segunda línea mostró una tendencia al fracaso virológico más frecuente, en comparación con TT, aunque el estudio piloto no tenía potencia para demostrar esta diferencia. Este estudio está registrado en ClinicalTrials.gov, Número: NCT01829802

Background: Dual therapy has emerged as a novel concept for HIV treatment. This study was aimed at comparing a nucleoside-sparing dual regimen consisting of ATV/r + RAL (DT) vs standard therapy of ATV/r + TDF/FTC (TT) among individuals failing first NNRTI-containing treatment.Methods: Randomized multicenter open-label pilot study. Primary outcome: proportion of subjects with plasma HIV-1 RNA below the limit of detection (<50 copies/mL) at 48 weeks (W48). Secondary outcomes: proportion of discontinuation due to adverse events (AEs), time until viral suppression, time until loss of virological response, development of integrase resistance mutations, and absolute change in CD4 counts. The primary outcome was analyzed using the FDA snapshot analysis.Results: Out of 57 participants screened, 34 were randomized to receive: DT (n: 18) or TT (n: 16). At W48, virological response was achieved in 67% (n: 12/18) of participants receiving DT and 88% (n: 14/16) receiving TT by FDA snapshot analysis (p = NS) and 73% and 93% by per-protocol analysis (p = NS). CD4 cell count median change from baseline to W48 was +119 and + 52 cell/µL in DT and TT, respectively. Four participants receiving DT and one TT presented virological failure at W48, with low pVL. One participant developed an integrase resistance mutation (155H) and suppressed later on TT.Conclusion: ATV/r+RAL as second-line therapy showed a trend to more frequent virological failure, compared to TT, although the study was unpowered to prove this difference. No major differences were seen in tolerance or toxicity.This study is registered with ClinicalTrials.gov, Number: NCT01829802

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Introducción: El síndrome metabólico se ha asociado con cambios en parámetros hematológicos (glóbulos rojos, plaquetas y leucocitos); se pueden utilizar para identificar sujetos en riesgo de fenotipos metabólicamente no saludables (MUP). Se investigó si estos parámetros hematológicos sirven como biomarcadores para distinguir el fenotipo metabólicamente sano (MHP) del MUP en niños y adolescentes. Métodos: Estudio transversal, 292 niños y adolescentes. El diagnóstico de MUP fue según consenso. Se utilizó ANOVA unidireccional en las comparaciones, regresión logística múltiple para determinar si el sexo, el grupo etario, el estado nutricional, la pubertad, los parámetros hematológicos y la resistencia a la insulina se asociaron con MUP. Resultados: Edad media 11 años (DE: 2,61). Los valores de RDW fueron significativamente más bajos en los niños en el grupo de peso normal metabólicamente insalubre (MUNW) en comparación con los niños con obesidad metabólicamente no saludable (MUO) (12,33 ± 0,90 vs. 13,67 ± 0,52; p = 0,01) y en la obesidad metabólicamente saludable (MHO) en comparación con el grupo MUO (13,15 ± 0,53 vs. 13,67 ± 0,52; p = 0,04). En adolescentes, la relación plaquetas/linfocitos fue mayor en el grupo MHNW (con un valor medio de 152,60 (DE 62,97) vs 111,16 (DE 44,12) para el grupo MHO. Al ajustar por edad, estado nutricional y pubertad, los índices hematológicos no se asociaron con MUP. Conclusión: Los parámetros hematológicos no están asociados independientemente con el MUP, y es poco probable que representen biomarcadores confiables para la detección del MUP en la población pediátrica.

Introduction: Metabolic syndrome has been associated with changes in several hematological parameters, such as red blood cells, platelets, and leucocytes. Therefore, hematologic parameters can be used to identify the subjects at risk of metabolically unhealthy phenotypes (MUP). The current study investigated if hematological parameters can serve as biomarkers to distinguish metabolically healthy phenotype (MHP) from MUP in children and adolescents. Methods: Two hundred ninety-two children and adolescents were enrolled in this cross-sectional study. The MUP was diagnosed using consensus-based criteria. Group comparisons were performed using one-way ANOVA. Multiple logistic regression analysis was used to determine if sex, age group, nutritional status, puberty, hematological parameters, and insulin resistance were associated with MUP. Results: The subject's age mean was 11 years (SD: 2.61). RDW values were significantly lower in children in the metabolically unhealthy normal weight (MUNW) group compared to children with metabolically unhealthy obesity (MUO) group (12.33 ± 0.90 vs. 13.67 ± 0.52; p = 0.01) and in metabolically healthy obesity (MHO) compared to MUO group (13.15 ± 0.53 vs. 13.67 ± 0.52; p = 0.04). In adolescents, the platelet-to-lymphocyte ratio was higher in the MHNW group, with a mean value of 152.60 (SD 62.97) compared to 111.16 (SD 44.12) for the MHO group. However, after adjusting for age, nutritional status, and puberty, hematological indices were not associated with MUP. Conclusions: The study demonstrates that hematologic parameters are not independently associated with the MUP, and it is unlikely that they represent reliable biomarkers for screening for the MUP in the pediatric population.

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Because of the increasing demand for photovoltaic energy and the generation of end-of-life photovoltaic waste forecast, the feasibility to produce glass substrates for photovoltaic application by recycling photovoltaic glass waste (PVWG) material was analyzed. PVWG was recovered from photovoltaic house roof panels for developing windows glass substrates; PVWG was used as the main material mixed with other industrial waste materials (wSG). The glass was casted by air quenching, annealed, and polished to obtain transparent substrates samples. Fluorine-doped tin oxide (FTO) was deposited as back contact on the glass substrates by spray pyrolysis. The chemical composition of the glass materials was evaluated by X-ray fluorescence (XRF), the thermal stability was measured by differential thermal analysis (DTA) and the transmittance was determined by UV-VIS spectroscopy. The surface of the glass substrates and the deposited FTO were observed by scanning electron microscopy (SEM), the amorphous or crystalline state of the specimens were determined by X-ray diffraction (XRD) and the sheet resistance was evaluated by the four-point probe method. The sheet resistance of the deposited FTO on the wSG substrate was 7.84 ± 3.11 Ω/□, lower than that deposited on commercial soda-lime glass (8.48 ± 3.67 Ω/□), meaning that this material could present improved conduction of the produced electrons by the photovoltaic effect. This process may represent an alternative to produce glass substrates from waste materials that could be destined for photovoltaic applications, especially the production of ecological photovoltaic windows.

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Rheumatoid Arthritis (RA) is an autoimmune disease characterized by loss of immune tolerance and chronic inflammation. It is pathogenesis complex and includes interaction between genetic and environmental factors. Current evidence supports the hypothesis that gut dysbiosis may play the role of environmental triggers of arthritis in animals and humans. Progress in the understanding of the gut microbiome and RA. has been remarkable in the last decade. In vitro and in vivo experiments revealed that gut dysbiosis could shape the immune system and cause persistent immune inflammatory responses. Furthermore, gut dysbiosis could induce alterations in intestinal permeability, which have been found to predate arthritis onset. In contrast, metabolites derived from the intestinal microbiota have an immunomodulatory and anti-inflammatory effect. However, the precise underlying mechanisms by which gut dysbiosis induces the development of arthritis remain elusive. This review aimed to highlight the mechanisms by which gut dysbiosis could contribute to the pathogenesis of RA. The overall data showed that gut dysbiosis could contribute to RA pathogenesis by multiple pathways, including alterations in gut barrier function, molecular mimicry, gut dysbiosis influences the activation and the differentiation of innate and acquired immune cells, cross-talk between gut microbiota-derived metabolites and immune cells, and alterations in the microenvironment. The relative weight of each of these mechanisms in RA pathogenesis remains uncertain. Recent studies showed a substantial role for gut microbiota-derived metabolites pathway, especially butyrate, in the RA pathogenesis.

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In Argentina, transgender women (TGW) have a high HIV prevalence (34%). However, this population shows lower levels of adherence, retention in HIV care and viral suppression than cisgender patients. The World Health Organization (WHO) recommends the transition to dolutegravir (DTG)-based regimens to reduce adverse events and improve adherence and retention. The purpose of this study was to determine retention, adherence and viral suppression in naïve TGW starting a DTG-based first-line antiretroviral treatment (ART) and to identify clinical and psychosocial factors associated with retention. We designed a prospective, open-label, single-arm trial among ART-naïve HIV positive TGW (Clinical Trial Number: NCT03033836). Participants were followed at weeks 4, 8, 12, 24, 36 and 48, in a trans-affirmative HIV care service that included peer navigators, between December, 2015 and May, 2019. Retention was defined as the proportion of TGW retained at week 48 and adherence was self-reported. Viral suppression at <50 copies/mL was evaluated using snapshot algorithm and as per protocol analysis. Of 75 TGW screened, 61 were enrolled. At baseline, median age was 28 y/o., HIV-1-RNA (pVL) 46,908 copies/mL and CD4+ T-cell count 383 cells/mm3. At week 48, 77% were retained and 72% had viral suppression (97% per protocol). The regimen was well tolerated and participants reported high adherence (about 95%). Eleven of the fourteen TGW who discontinued or were lost to follow-up had undetectable pVL at their last visit. Older age was associated with better retention. DTG-based treatment delivered by a trans-competent team in a trans-affirmative service was safe and well tolerated by TGW and associated with high retention, high adherence and high viral suppression at 48 weeks among those being retained.

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El foramen mentoniano es un hito anatómico en la cara externa del cuerpo mandibular del que emergen el nervio mentoniano y su paquete vascular. Podemos observar más forámenes, tanto en la cara externa como en la cara lingual de la mandíbula. Se denominará foramen mentoniano accesorio si se comprueba su continuidad con el conducto mentoniano o con el conducto dentario inferior, y se llamará foramen lingual lateral si se continúa con el conducto dentario inferior y emerge en la superficie lingual, distal a la zona de caninos. Se pueden presentar otras variantes anatómicas menos frecuentes como la agenesia uni o bilateral del foramen mentoniano y la presencia del foramen incisivo. La detección de las variantes anatómicas del foramen mentoniano es de gran importancia en el planeamiento de diversos tratamientos invasivos en la zona, para evitar disturbios sensoriales y accidentes vasculares.

The mental foramen is an anatomical landmark on the external face of the mandibular body from which the mental nerve and its vascular bundle emerge. We can observe more foramina, both on the external aspect and on the lingual aspect of the mandible. It will be called accessory mental foramen if its continuity with the mental canal or the lower dental canal is verified, and it will be called lateral lingual foramen if it continues with the lower dental canal and emerges on the lingual surface, distal to the canine area. Other less frequent anatomical variants may occur, such as unilateral or bilateral agenesis of the mental foramen and the presence of the incisive foramen. The detection of the anatomical variants of the mental foramen is of great importance in the planning of various invasive treatments in the area, to avoid sensory disturbances and vascular accidents.

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INTRODUCCIÓN Las fracturas del fémur proximal pediátricas son infrecuentes, se asocian a traumas de alta energía, y presentan complicaciones devastadoras. La mayoría de los casos se tratan en forma quirúrgica utilizando diversos tipos de fijación. El objetivo de este estudio es reportar los resultados de una serie de casos de pacientes quirúrgicos en dos hospitales de referencia en Chile. MATERIALES Y MÉTODOS Serie de casos tratados entre el 2004y el 2018, en la que se incluyeron pacientes pediátricos con diagnóstico de fractura de fémur proximal que fueron operados. Se realizó estadística descriptiva de las variables demográficas, la energía del accidente, la clasificación según Delbet, el tipo de tratamiento, la técnica de osteosíntesis, la aparición de complicaciones, y la evaluación clínico-radiológica. RESULTADOS Se evaluaron 17 casos, de los cuales un 76,5% fueron secundarios a accidentes de alta energía. La mediana de edad de la muestra fue de 7 años, y había un 58,8% de niñas. Hubo 3 casos de tipo II en la clasificación de Delbet, 9 de tipo III, y 5 de tipo IV. Como método de fijación, se utilizaron tornillos canulados (9 casos), placa de compresión de bloqueo (locking compression plate, LCP, en inglés; 5 casos), tornillo dinámico de cadera (dynamic hip screw, DHS, en inglés; 2 casos), y placa de compresión dinámica (dynamic compression plate, DCP, en inglés; 1 caso). La mediana de seguimiento fue de 2,3 años (rango: 0,5 a 12,8 años). Se presentaron complicaciones: coxa vara en un caso, y discrepancia de longitud de extremidades inferiores en otro caso, y no hubo osteonecrosis. Se realizó retiro de osteosíntesis en siete pacientes. Se obtuvieron buenos resultados en todos los pacientes según los criterios de Ratliff. CONCLUSIONES La mayoría de las fracturas se asociaron a traumas de alta energía, siendo el tipo más frecuente el III de Delbet. Todos los pacientes fueron tratados en forma quirúrgica, con buenos resultados, sin observar osteonecrosis.

INTRODUCTION Pediatric hip fractures are infrequent, associated with high-energy trauma, and present devastating complications. Most cases are treated surgically using different types of fixation. The objective of the present study is to report the results of a series of cases of surgical patients in two reference hospitals in Chile. MATERIALS AND METHODS A case series which included pediatric patients diagnosed with hip fractures and treated surgically between 2004 and 2008. We performed descriptive statistics for the demographic variables, the energy of the accident, the Delbet classification, the type of treatment, the osteosynthesis technique, of complications, and the clinico-radiological evaluation according to evaluation. RESULTS A total of 17 cases were evaluated, 76.5% of which were secondary to high-energy accidents. The median age of the sample was of 7 years, and it was composed of 58.8% of girls. There were 3 cases of Delbet type II, 9 of type III, and 5 of type IV. As fixation method, we used cannulated screws (9 cases), locking compression plates (LCPs; 5 cases), dynamic hip screws (DHSs; 2 cases), and dynamic compression plates (DCPs; 1 case). The median follow-up was of 2.3 years (range: 0.5 to 12.8 years). Complications were observed: coxa vara in one case, and discrepancy in the length of the lower extremities in another case, and there were no cases of osteonecrosis. Osteosynthesis removal was performed in seven patients. Good results were obtained in all patients according to Ratliff criteria. CONCLUSIONS Most fractures were associated with high energy trauma, with the most frequent being type III on the Delbet classification. All the patients were treated surgically, with good results, with no cases of osteonecrosis.

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Transdermal administration of molecules across the skin has gained interest because it can be considered a non-invasive route compared with traditional ones. However, going through the skin is challenging due to the presence of the stratum corneum, the main barrier of substances. For this reason, the goal of this research was the combination of omega-3 (ω-3) and a dextran sulfate assembly in a nanostructure form, which allows passage through the skin and improves the bioavailability and the therapeutic profiles of active molecules, such as imiquimod. Here we report a new colloidal system, named dextran nanocapsules, with ω-3 in its nucleus and a coat made of dextran sulfate with a size ~150 nm, monomodal distribution, and negative zeta potential (~-33 mV). This nanosystem encapsulates imiquimod with high efficacy (~86%) and can release it in a controlled fashion following Korsmeyer-Peppas kinetics. This formulation is stable under storage and physiological conditions. Furthermore, a freeze-dried product could be produced with different cryoprotectants and presents a good security profile in the HaCaT cell line. Ex vivo assays with newborn pig skin showed that dextran nanocapsules promote transdermal delivery and retention 10 times higher than non-encapsulated imiquimod. These promising results make this nanosystem an efficient vehicle for imiquimod transdermal delivery.

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Multiple vaccines against severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) have been evaluated in clinical trials. However, trials addressing the immune response in the pediatric population are scarce. The inactivated vaccine CoronaVac has been shown to be safe and immunogenic in a phase 1/2 clinical trial in a pediatric cohort in China. Here, we report interim safety and immunogenicity results of a phase 3 clinical trial for CoronaVac in healthy children and adolescents in Chile. Participants 3 to 17 years old received two doses of CoronaVac in a 4-week interval until 31 December 2021. Local and systemic adverse reactions were registered for volunteers who received one or two doses of CoronaVac. Whole-blood samples were collected from a subgroup of 148 participants for humoral and cellular immunity analyses. The main adverse reaction reported after the first and second doses was pain at the injection site. Four weeks after the second dose, an increase in neutralizing antibody titer was observed in subjects relative to their baseline visit. Similar results were found for activation of specific CD4+ T cells. Neutralizing antibodies were identified against the Delta and Omicron variants. However, these titers were lower than those for the D614G strain. Importantly, comparable CD4+ T cell responses were detected against these variants of concern. Therefore, CoronaVac is safe and immunogenic in subjects 3 to 17 years old, inducing neutralizing antibody secretion and activating CD4+ T cells against SARS-CoV-2 and its variants. (This study has been registered at ClinicalTrials.gov under no. NCT04992260.) IMPORTANCE This work evaluated the immune response induced by two doses of CoronaVac separated by 4 weeks in healthy children and adolescents in Chile. To date, few studies have described the effects of CoronaVac in the pediatric population. Therefore, it is essential to generate knowledge regarding the protection of vaccines in this population. Along these lines, we reported the anti-S humoral response and cellular immune response to several SARS-CoV-2 proteins that have been published and recently studied. Here, we show that a vaccination schedule consisting of two doses separated by 4 weeks induces the secretion of neutralizing antibodies against SARS-CoV-2. Furthermore, CoronaVac induces the activation of CD4+ T cells upon stimulation with peptides from the proteome of SARS-CoV-2. These results indicate that, even though the neutralizing antibody response induced by vaccination decreases against the Delta and Omicron variants, the cellular response against these variants is comparable to the response against the ancestral strain D614G, even being significantly higher against Omicron.

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Objective: Identify risk factors for severe outcome in Mexican patients with COVID-19 in the population of Quintana Roo. Material and methods: Study of 5,916 who met the criteria for suspected cases of COVID-19, 2,531 confirmed by qrTPCR-Sars-CoV-2 tests, of which 1,486 were positive, among which they were classified as hospitalized (severe COVID-19) and outpatients. Multivariate logistic regression analysis was performed to explore the factors associated with the severity of COVID-19 and death as clinical outcomes. The basic reproduction number (R0) was calculated Statistical analysis) Endorsement of the ethics committee 2301. Results: SARS-CoV-2 positive patients presented a high prevalence of hypertension 29.1%, diabetes 23.5%, obesity 24%, and 48.5% have at least one chronic disease. There is a high risk of severity for COVID-19 in patients with diabetes OR=3.14, hypertension OR=1.88, obesity OR=1.68, kidney disease OR=3.2, older than 65 years OR=13.6 and men OR=1.7. These factors also increase the risk of death up to 7.7 times. The maximum R0 during the epidemic was 2.4. Conclusion: Liver and kidney disease, diabetes, hypertension, and obesity are significantly associated with severe COVID-19 and death.

Objetivo: identificar factores de riesgo para desenlace a COVID-19 grave en pacientes mexicanos con de COVID-19 en población en Quintana Roo. Material y métodos: estudio de 5,916 quienes cumplieron criterios de casos sospechosos de COVID-19, 2,531 confirmados por pruebas qrTPCR-Sars-CoV-2 de los cuales 1,486 fueron positivos entre los cuales se clasifico en hosptializados (COVID-19 grave) y ambulatorios. Se realizó análisis de regresión logística multivariada para explorar los factores asociados con la gravedad de COVID-19 y defunción como desenlaces clínicos. Se calculó el número básico de reproducción (R0) Análisis estadístico) Aval del comité de ética 2301. Resultados: pacientes positivos a SARS-CoV-2 presentaron alta prevalencia de hipertensión 29.1%, diabetes 23.5%, obesidad 24%, y 48.5% tiene al menos una enfermedad crónica. Existe alto riesgo de severidad para COVID-19 en pacientes con diabetes OR=3.14; hipertensión OR=1.88, obesidad OR=1.68, enfermedad renal OR=3.2, mayores de 65 años OR=13.6 y hombres OR=1.7. Estos factores también incrementan el riesgo de defunción hasta 7.7 veces. El R0 máximo durante la epidemia fue de 2.4. Conclusión: la enfermedad hepática, renal, diabetes, hipertensión y obesidad se asocian significativamente a COVID-19 severo y defunción.

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RESUMEN Objetivo: Evaluar la posición, forma y variantes anatómicas del foramen mentoniano evaluadas mediante tomografía computarizada de haz cónico en pacientes del servicio de radiología dental del Hospital Cayetano Heredia. Material y Métodos : Se evaluaron todas las tomografías que fueron adquiridas entre los años 2017 y 2020 que cumplían con los criterios de selección, donde se analizaron las variables mencionadas. Las observaciones se registraron en una ficha de datos diseñada para este propósito. Resultados : Se evaluaron 117 volúmenes tomográficos, sumando un total de 209 forámenes mentonianos. La posición horizontal y vertical más común fue entre el primer y segundo premolar y por debajo de la línea imaginaria de los premolares respectivamente. Las formas ovaladas con predominio horizontal y redondeada se presentaron en porcentajes similares. La variante anatómica que se halló con mayor frecuencia fue el foramen lingual lateral. Conclusiones : No se encontró asociación estadísticamente significativa entre la posición, forma y variantes anatómicas del foramen mentoniano con el sexo, edad y lado.

ABSTRACT Objective: To evaluate the position, shape and anatomical variants of the mental foramen evaluated by cone beam computed tomography in patients of the dental radiology service of the Cayetano Heredia Hospital. Material and Methods : All the CT scans acquired between the years 2017 and 2020 that met the selection criteria were evaluated and the mentioned variables were analyzed. Observations were recorded on a data sheet designed for this purpose. Results : 117 tomographic volumes were evaluated, adding a total of 209 mental foramina. The most common horizontal and vertical position was between the first and second premolars and below the imaginary line of the premolars respectively. The oval horizontal and rounded forms were presented in similar percentages. The most frequently found anatomical variant was the lateral lingual foramen. Conclusions: No statistically significant association was found between the position, shape and anatomical variants of the mental foramen with sex, age and side.