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The authors propose a novel flap for rhinoplasty: the supratip cross flap (SCF). It is a simple and effective method for avoiding and correcting alar contour deformities and external nasal valve (ENV) issues in rhinoplasty without grafts. In addition to its benefit for supratip break, the flap also allows a smooth and natural transition between the nasal dorsum and the nasal tip complex.

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Bacillus sensu lato were screened for their capacity to mineralize organic phosphorus (P) and promote plant growth, improving nitrogen (N) and P nutrition of soybean. Isolates were identified through Type Strain Genome Server (TYGS) and Average Nucleotide Identity (ANI). ILBB95, ILBB510 and ILBB592 were identified as Priestia megaterium, ILBB139 as Bacillus wiedmannii, ILBB44 as a member of a sister clade of B. pumilus, ILBB15 as Peribacillus butanolivorans and ILBB64 as Lysinibacillus sp. These strains were evaluated for their capacity to mineralize sodium phytate as organic P and solubilize inorganic P in liquid medium. These assays ranked ILBB15 and ILBB64 with the highest orthophosphate production from phytate. Rhizocompetence and plant growth promotion traits were evaluated in vitro and in silico. Finally, plant bioassays were conducted to assess the effect of the co-inoculation with rhizobial inoculants on nodulation, N and P nutrition. These bioassays showed that B. pumilus, ILBB44 and P. megaterium ILBB95 increased P-uptake in plants on the poor substrate of sand:vermiculite and also on a more fertile mix. Priestia megaterium ILBB592 increased nodulation and N content in plants on the sand:vermiculite:peat mixture. Peribacillus butanolivorans ILBB15 reduced plant growth and nutrition on both substrates. Genomes of ILBB95 and ILBB592 were characterized by genes related with plant growth and biofertilization, whereas ILBB15 was differentiated by genes related to bioremediation. Priestia megaterium ILBB592 is considered as nodule-enhancing rhizobacteria and together with ILBB95, can be envisaged as prospective PGPR with the capacity to exert positive effects on N and P nutrition of soybean plants.

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Background: The prevalence of atopic dermatitis (AD) is increasing in developing countries. Different worldwide guidelines have been proposed, but their applicability for AD specialists in Latin American (LA) countries is unknown. Objective: The objective of this study was to explore the medical approach to treating AD in LA countries. Methods: The study population comprised AD specialists (allergists and dermatologists). They completed an electronic survey containing questions about the health system, diagnostic criteria, and pharmacotherapy approach to treating AD. The survey was constructed and validated by the Atopic Dermatitis Committee of the Latin American Society of Allergy Asthma and Immunology (SLAAI) in Spanish and Portuguese. Each member was responsible for distributing the questionnaire through different networks in their respective countries. Results: A total of 284 AD specialists from 13 LA countries completed the questionnaire; among them, 67% were allergists and 33% were dermatologists. Less than 50% of the AD specialists strictly followed guideline recommendations. Among the AD specialists, the European and North American guidelines were more frequently used, and only 16% followed LA guidelines. Dermatologists used the local guidelines less frequently than allergists. Most physicians did not routinely use AD assessment tools (55%). The frequency of the diagnostic tests depends on symptom severity. The availability of some systemic treatments, such as biologics and Janus Kinase (JAK) inhibitors, is not universal in all LA countries. Conclusion: There were marked differences between the specialists, and these differences seemed to be affected by their specialty and each country's healthcare system. New AD education strategies that consider the particularities of the region could allow patients to be more accurately managed. AD assessment tools may provide a way to enhance AD treatment and allow for shared decision-making, patient empowerment, and standardized care.

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Decoration of nanoparticles with specific molecules such as antibodies, peptides, and proteins that preserve their biological properties is essential for the recognition and internalization of their specific target cells. Inefficient preparation of such decorated nanoparticles leads to nonspecific interactions diverting them from their desired target. We report a simple two-step procedure for the preparation of biohybrid nanoparticles containing a core of hydrophobic quantum dots coated with a multilayer of human serum albumin. These nanoparticles were prepared by ultra-sonication, crosslinked using glutaraldehyde, and decorated with proteins such as human serum albumin or human transferrin in their native conformations. These nanoparticles were homogeneous in size (20-30 nm), retained the fluorescent properties of quantum dots, and did not show a "corona effect" in the presence of serum. The uptake of transferrin-decorated quantum dot nanoparticles was observed in A549 lung cancer and SH-SY5Y neuroblastoma cells but not in non-cancerous 16HB14o- or retinoic acid dopaminergic neurons differentiated SH-SY5Y cells. Furthermore, digitoxin-loaded transferrin-decorated nanoparticles decreased the number of A549 cells without effect on 16HB14o-. Finally, we analyzed the in vivo uptake of these biohybrids by murine retinal cells, demonstrating their capacity to selectively target and deliver into specific cell types with excellent traceability.

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Chronic kidney disease (CKD) is a highly prevalent disease that has become a public health problem. Progression of CKD is associated with serious complications, including the systemic CKD-mineral and bone disorder (CKD-MBD). Laboratory, bone and vascular abnormalities define this condition, and all have been independently related to cardiovascular disease and high mortality rates. The "old" cross-talk between kidney and bone (classically known as "renal osteodystrophies") has been recently expanded to the cardiovascular system, emphasizing the importance of the bone component of CKD-MBD. Moreover, a recently recognized higher susceptibility of patients with CKD to falls and bone fractures led to important paradigm changes in the new CKD-MBD guidelines. Evaluation of bone mineral density and the diagnosis of "osteoporosis" emerges in nephrology as a new possibility "if results will impact clinical decisions". Obviously, it is still reasonable to perform a bone biopsy if knowledge of the type of renal osteodystrophy will be clinically useful (low versus high turnover-bone disease). However, it is now considered that the inability to perform a bone biopsy may not justify withholding antiresorptive therapies to patients with high risk of fracture. This view adds to the effects of parathyroid hormone in CKD patients and the classical treatment of secondary hyperparathyroidism. The availability of new antiosteoporotic treatments bring the opportunity to come back to the basics, and the knowledge of new pathophysiological pathways [OPG/RANKL (LGR4); Wnt-ß-catenin pathway], also affected in CKD, offers great opportunities to further unravel the complex physiopathology of CKD-MBD and to improve outcomes.

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The COVID-19 pandemic has given rise to numerous commercially available antigen rapid diagnostic tests (Ag-RDTs). To generate and to share accurate and independent data with the global community requires multisite prospective diagnostic evaluations of Ag-RDTs. This report describes the clinical evaluation of the OnSite COVID-19 rapid test (CTK Biotech, CA, USA) in Brazil and the United Kingdom. A total of 496 paired nasopharyngeal (NP) swabs were collected from symptomatic health care workers at Hospital das Clínicas in São Paulo, Brazil, and 211 NP swabs were collected from symptomatic participants at a COVID-19 drive-through testing site in Liverpool, United Kingdom. Swabs were analyzed by Ag-RDT, and results were compared to quantitative reverse transcriptase PCR (RT-qPCR). The clinical sensitivity of the OnSite COVID-19 rapid test in Brazil was 90.3% (95% confidence interval [CI], 75.1 to 96.7%) and in the United Kingdom was 75.3% (95% CI, 64.6 to 83.6%). The clinical specificity in Brazil was 99.4% (95% CI, 98.1 to 99.8%) and in the United Kingdom was 95.5% (95% CI, 90.6 to 97.9%). Concurrently, analytical evaluation of the Ag-RDT was assessed using direct culture supernatant of SARS-CoV-2 strains from wild-type (WT), Alpha, Delta, Gamma, and Omicron lineages. This study provides comparative performance of an Ag-RDT across two different settings, geographical areas, and populations. Overall, the OnSite Ag-RDT demonstrated a lower clinical sensitivity than claimed by the manufacturer. The sensitivity and specificity from the Brazil study fulfilled the performance criteria determined by the World Health Organization, but the performance obtained from the UK study failed to do. Further evaluation of Ag-RDTs should include harmonized protocols between laboratories to facilitate comparison between settings. IMPORTANCE Evaluating rapid diagnostic tests in diverse populations is essential to improving diagnostic responses as it gives an indication of the accuracy in real-world scenarios. In the case of rapid diagnostic testing within this pandemic, lateral flow tests that meet the minimum requirements for sensitivity and specificity can play a key role in increasing testing capacity, allowing timely clinical management of those infected, and protecting health care systems. This is particularly valuable in settings where access to the test gold standard is often restricted.

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Herpes simplex virus 1 is one of the most prevalent pathogens worldwide. Resistant strains to current anti-viral treatment have been reported, requiring the search for novel anti-virals. Using a qPCR method to assess anti-herpetic activity from natural products, we analyzed 72 plant extracts from El Salvador and identified eighteen methanolic extracts with anti-viral activity of ≥ 75%. Anti-herpetic activity has not been previously reported in fourteen of the plants (Euphorbia lancifolia, Piper tuberculatum, Cordia alliodora, Tecoma stans, Taraxacum officinale, Hamelia patens, Witheringia solanacea, Emilia fosbergii, Gnaphalium viscosum, Citrus aurantium, Ambrosia peruviana, Carica papaya, Solanum hazenii and Melothria pendula). Four extracts were from species with previously reported anti-herpetic activity (Plantago major, Psidium guajava, Sida acuta and Bursera simaruba). These extracts effective anti-viral concentrations (EC50) were between 203 and 6.31 µg/mL, while the selectivity indexes (SI) were between 55.91 and 2.57. Euphorbia lancifolia showed the most effective anti-viral activity (EC50 = 6.31 µg/mL, SI = 51.82).

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Huanglongbing (HLB), the current major threat for Citrus species, is caused by intracellular alphaproteobacteria of the genus Candidatus Liberibacter (CaL), with CaL asiaticus (CLas) being the most prevalent species. This bacterium inhabits phloem cells and is transmitted by the psyllid Diaphorina citri. A gene encoding a putative serralysin-like metalloprotease (CLIBASIA_01345) was identified in the CLas genome. The expression levels of this gene were found to be higher in citrus leaves than in psyllids, suggesting a function for this protease in adaptation to the plant environment. Here, we study the putative role of CLas-serralysin (Las1345) as virulence factor. We first assayed whether Las1345 could be secreted by two different surrogate bacteria, Rhizobium leguminosarum bv. viciae A34 (A34) and Serratia marcescens. The protein was detected only in the cellular fraction of A34 and S. marcescens expressing Las1345, and increased protease activity of those bacteria by 2.55 and 4.25-fold, respectively. In contrast, Las1345 expressed in Nicotiana benthamiana leaves did not show protease activity nor alterations in the cell membrane, suggesting that Las1345 do not function as a protease in the plant cell. Las1345 expression negatively regulated cell motility, exopolysaccharide production, and biofilm formation in Xanthomonas campestris pv. campestris (Xcc). This bacterial phenotype was correlated with reduced growth and survival on leaf surfaces as well as reduced disease symptoms in N. benthamiana and Arabidopsis. These results support a model where Las1345 could modify extracellular components to adapt bacterial shape and appendages to the phloem environment, thus contributing to virulence.

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In this prospective cohort of 30 vaccinated healthcare workers with mild Omicron variant infection, we evaluated viral culture, rapid antigen test (RAT), and real-time reverse-transcription polymerase chain reaction (RT-PCR) of respiratory samples at days 5, 7, 10, and 14. Viral culture was positive in 46% (11/24) and 20% (6/30) of samples at days 5 and 7, respectively. RAT and RT-PCR (Ct ≤35) showed 100% negative predictive value (NPV), with positive predictive values (PPVs) of 32% and 17%, respectively, for predicting viral culture positivity. A lower RT-PCR threshold (Ct ≤24) improved culture prediction (PPV = 39%; NPV = 100%). Vaccinated persons with mild Omicron infection are potentially transmissible up to day 7. RAT and RT-PCR might be useful tools for shortening the isolation period.

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OBJETIVO: Los tumores de ovario borderline (BOT) son un grupo de lesiones neoplásicas de origen epitelial del ovario que presentan características de tumores malignos, pero sin invasión del estroma, y se caracterizan por tener un buen pronóstico. El objetivo del estudio es determinar la concordancia diagnóstica entre biopsia contemporánea y definitiva de los BOT en nuestro centro hospitalario. MÉTODO: Se realizó un estudio analítico retrospectivo de corte transversal de las biopsias contemporáneas y definitivas de BOT en la base de datos de anatomía patológica del Hospital Padre Hurtado, entre los años 2010 y 2019. El análisis estadístico de concordancia se realizó mediante test de kappa. RESULTADOS: Se revisaron 4546 informes de biopsias entre los años 2010 y 2019. Se pesquisaron 163 tumores malignos de ovario, de los cuales 69 (42,33%) correspondieron a BOT. De estos, 39 fueron serosos (56,2%), 28 mucinosos (40,57%) y 2 (2,8%) de tipo endometrioide. El resultado de concordancia diagnóstica de BOT seroso es moderada, del 75,71% con un índice de kappa de 0,5143 (p = 0,000), y el de BOT mucinoso es débil, del 65,71% con un índice de kappa de 0,2398 (p = 0,0222). CONCLUSIONES: Los BOT corresponden a un gran porcentaje dentro de los tumores malignos del ovario, siendo el subtipo seroso el más común. La concordancia entre biopsia contemporánea y definitiva es de débil a moderada.

OBJECTIVE: Borderline ovarian tumors (BOT) are a group of neoplastic lesions of epithelial origin of the ovary that present characteristics of malignant tumors but without stromal invasion and are characterized by having a good prognosis. The objective of the study is to determine the concordance between frozen section and definitive biopsy of BOT in our hospital center. METHOD: A retrospective, cross-sectional analytical study of the frozen section and definitive BOT biopsies was performed in the pathological anatomy database of the Padre Hurtado Hospital during the years 2010 and 2019. The statistical and concordance analysis was performed using kappa tests. RESULTS: 4546 biopsy reports were reviewed during 2010 and 2018. A total of 163 malignant ovarian tumors were investigated, of which 69 (42%) corresponded to BOT. Of these, the most common subtypes were 39 (56.2%) serous, 28 (40.57%) mucinous and 2 (2.8%) endometroid. The concordance results of serous BOT is moderate, 75.71% with a kappa index of 0.5143 (p = 0.000), and mucinous BOT have fair concordance, 65.71% with a kappa index of 0.2398 (p = 0.0222). CONCLUSIONS: BOT correspond to a large percentage of malignant tumors of the ovary, with the serous subtype being the most common. The concordance between contemporary and definitive biopsy is between fair and moderate.

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RESUMEN. La Educación Física, como asignatura escolar obligatoria, debe realizar acciones para hacer frente a los altos niveles de inactividad física, sedentarismo y obesidad en la población, destacándose en importancia, la evaluación de la aptitud física y su posterior programación del ejercicio en las escuelas. Los propósitos del estudio fueron: 1) Evaluar de manera sencilla la condición física de un curso del nivel escolar secundario (n=17), de un colegio privado de la ciudad de La Plata, provincia de Buenos Aires, Argentina. 2) Conocer y relacionar los niveles de aptitud muscular y adiposidad corporal en los alumnos. Tras la investigación, se conoció que la obesidad influye negativamente en los resultados de las evaluaciones de la aptitud muscular, como muestran otros estudios. Se pudo concluir que es posible la evaluación de la condición física de los escolares para la obtención de información valiosa en pos de la prevención de la inactividad física.

ABSTRACT. Physical Education, as a compulsory school subject, must take actions to deal with the high levels of physical inactivity, sedentary lifestyle and obesity in the population. Standing out in importance, the evaluation of physical fitness and its subsequent programming of exercise in schools. The purposes of the study were: 1) To evaluate in a simple way the physical condition of a course at the secondary school level (n = 17), of a private school in the city of La Plata, province of Buenos Aires, Argentina. 2) Know and relate the levels of muscle fitness and body fat in students. After the investigation it was known that obesity negatively influences the results of evaluations of muscular fitness, as other studies show. Concluding that it was possible to assess the physical condition of school students, in order to obtain valuable information in order to prevent physical inactivity.

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Escherichia coli is the most frequent agent of urinary tract infections in humans. The emergence of uropathogenic multidrug-resistant (MDR) E. coli strains that produce extended spectrum ß-lactamases (ESBL) has created additional problems in providing adequate treatment of urinary tract infections. We have previously reported the antimicrobial activity of 1,8-cineole, one of the main components of Rosmarinus officinalis volatile oil, against Gram negative bacteria during planktonic growth. Here, we evaluated the antibiofilm activity of 1,8-cineole against pre-formed mature biofilms of MDR ESBL-producing uropathogenic E. coli clinical strains by carrying out different technical approaches such as counting of viable cells, determination of biofilm biomass by crystal violet staining, and live/dead stain for confocal microscopy and flow cytometric analyses. The plant compound showed a concentration- and time-dependent antibiofilm activity over pre-formed biofilms. After a 1 h treatment with 1% (v/v) 1,8-cineole, a significant decrease in viable biofilm cell numbers (3-log reduction) was observed. Biofilms of antibiotic-sensitive and MDR ESBL-producing E. coli isolates were sensitive to 1,8-cineole exposure. The phytochemical treatment diminished the biofilm biomass by 48-65% for all four E. coli strain tested. Noteworthy, a significant cell death in the remaining biofilm was confirmed by confocal laser scanning microscopy after live/dead staining. In addition, the majority of the biofilm-detached cells after 1,8-cineole treatment were dead, as shown by flow cytometric assessment of live/dead-stained bacteria. Moreover, phytochemical-treated biofilms did not fully recover growth after 24 h in fresh medium. Altogether, our results support the efficacy of 1,8-cineole as a potential antimicrobial agent for the treatment of E. coli biofilm-associated infections.

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INTRODUCCIÓN: Actualmente la cirugía laparoscópica es el gold standard de la mayoría de las cirugías ginecológicas benignas. Se estima una tasa de complicaciones en cirugía ginecológica por laparoscopía de 3.2 por 1000 pacientes, donde alrededor del 50% ocurren al momento de la primera entrada. Existen numerosas clasificaciones de las complicaciones quirúrgicas, entre ellas, la clasificación Clavien-Dindo se centra en el tratamiento postquirúrgico y tiene como objetivo unificar criterios y hacerlas comparables entre distintos centros. OBJETIVO: Describir las complicaciones en cirugía laparoscópica ginecológica en el Hospital Padre Hurtado, destacando el subgrupo de primera entrada y su clasificación Clavien-Dindo. METODOLOGÍA: Cohorte retrospectiva que incluyó a todas las pacientes operadas por laparoscopía en el pabellón de ginecología del Hospital Padre Hurtado desde el año 2014 al 2017. Se utilizó el software SPSS statistics v25, con prueba X2 para el análisis de las variables no paramétricas y t de Student para las variables paramétrica, considerando una significación estadística con p<0,05. RESULTADOS: De las 513 cirugías laparoscópicas ginecológicas realizadas en el período evaluado, sólo el 4,3% del total de las pacientes tuvieron complicaciones. De éstas, un 9% fueron de primera entrada, y en todos los casos fueron complicaciones menores o Clavien-Dindo I y II. Hubo 2 complicaciones Clavien-Dindo >III B, lo que correspondió a un 0,39%. CONCLUSIÓN: En nuestro grupo hubo una baja incidencia de complicaciones quirúrgicas y de primera entrada lo que es comparable con otras series publicadas.

INTRODUCTION: Laparoscopic surgery is currently the gold standard of most benign gynecological surgeries. A complication rate in gynecological laparoscopy is 3.2 per 1000 patients, where around 50% occur at the time of the first entry. There are numerous classifications of surgical complications, among them, Clavien-Dindo classification focuses on post-surgical treatment and aims to unify criteria and lets compare between different centers. OBJECTIVE: To describe the complications in gynecological laparoscopic surgery at the Padre Hurtado Hospital, highlighting the first entry subgroup and Clavien-Dindo classification. METHODOLOGY: Retrospective cohort that included all gynecological laparoscopy patients in Padre Hurtado Hospital from 2014 to 2017. The SPSS statistics v25 software was used, with X2 test for the analysis of non-parametric variables and t Student for the parametric variables, considering a statistical significance with p <0.05. RESULTS: 513 gynecological laparoscopic surgeries was performed in the evaluated period, only 4.3% of the total patients had complications. Of these, 9% were first entry, and in all cases were minor complications or Clavien-Dindo I and II. There were 2 patients with Clavien-Dindo complications > III B, which corresponded to 0.39%. CONCLUSION: In our group there was a low incidence of surgical complications and first entry which is comparable with other published series.

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Oxidative stress and inflammation are crucial factors that increase with age. In the progression of multiple age-related diseases, antioxidants and bioactive compounds have been recognized as useful antiaging agents. Oxidized or reduced vitamin C exerts different actions on tissues and has different metabolism and uptake. In this study, we analyzed the antiaging effect of vitamin C, both oxidized and reduced forms, in renal aging using laser microdissection, quantitative reverse-transcription polymerase chain reaction, and immunohistochemical analyses. In the kidneys of old SAM mice (10 months of age), a model of accelerated senescence, vitamin C, especially in the oxidized form (dehydroascorbic acid [DHA]) improves renal histology and function. Serum creatinine levels and microalbuminuria also decrease after treatment with a decline in azotemia. In addition, sodium-vitamin C cotransporter isoform 1 levels, which were increased during aging, are normalized. In contrast, the pattern of glucose transporter 1 expression is not affected by aging or vitamin C treatment. We conclude that oxidized and reduced vitamin C are potent antiaging therapies and that DHA reverses the kidney damage observed in senescence-accelerated prone mouse 8 to a greater degree.

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Immunosuppressive treatments for rheumatic diseases present special problems in areas endemic for chronic infectious diseases because of the possibility of reactivation. Leishmaniasis is a significant neglected tropical disease caused by different species of protozoan parasites within the genus Leishmania. Amastigotes live as intracellular parasites in a variety of mammalian cells, most notably within phagocytes such as macrophages, and residual parasites can persist even after treatment and healing of the lesions. We herein report a case of relapsing mucosal leishmaniasis after aggressive immunotherapy for ankylosing spondylitis, with requirement for secondary prophylaxis with amphotericin B to prevent reactivation. This approach can be necessary for patients from endemic areas of tegumentary leishmaniasis, who will undergo aggressive immunotherapy.

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Citrus canker is an important disease of citrus, whose causal agent is the bacterium Xanthomonas citri ssp. citri (Xcc). In previous studies, we found a group of Xcc mutants, generated by the insertion of the Tn5 transposon, which showed impaired ability to attach to an abiotic substrate. One of these mutants carries the Tn5 insertion in hupB, a gene encoding a bacterial histone-like protein, homologue to the ß-subunit of the Heat-Unstable (HU) nucleoid protein of Escherichia coli. These types of protein are necessary to maintain the bacterial nucleoid organization and the global regulation of gene expression. Here, we characterized the influence of the mutation in hupB regarding Xcc biofilm formation and virulence. The mutant strain hupB was incapable of swimming in soft agar, whereas its complemented strain partially recovered this phenotype. Electron microscope imaging revealed that impaired motility of hupB was a consequence of the absence of the flagellum. Comparison of the expression of flagellar genes between the wild-type strain and hupB showed that the mutant exhibited decreased expression of fliC (encoding flagellin). The hupB mutant also displayed reduced virulence compared with the wild-type strain when they were used to infect Citrus lemon plants using different infection methods. Our results therefore show that the histone-like protein HupB plays an essential role in the pathogenesis of Xcc through the regulation of biofilm formation and biosynthesis of the flagellum.

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This study is the first to explore the contribution of different types of teacher regulatory talk-directive, guiding, and autonomy supportive talk-in children's development of self-regulation across cultures. Teacher-to-student talk was analyzed under naturalistic conditions in eight Year 4 classrooms, all situated in different primary schools in England (student N = 25) and Chile (N = 24). Self-regulation was studied by observing students' effective metacognitive monitoring (awareness of errors) and effective metacognitive control (effective control of problems) in a series of 11-13 cube assembly tasks. Mann-Whitney U tests showed that English participants demonstrated higher levels of effective metacognitive monitoring and control, and participating teachers a similar level of teacher regulatory talk across cultures. The function that regulatory talk had in predicting students' self-regulation, however, tended to vary according to culture. OLS multiple regressions revealed that while guiding talk had the same positive effect across cultures, directive talk had a negative effect in England but null effect in Chile, and autonomy supportive talk had a positive effect in Chile but negative in England. These results indicate that it would be valuable to explore further the culturally adaptive functionality of teacher talk for students' self-regulation development.

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Resumen: Introducción: Se ha discutido el uso de catéter en la arteria pulmonar (Swan-Ganz) por no ofrecer cambios en la mortalidad de los pacientes críticos; sin embargo, aún es una herramienta útil para monitoreo hemodinámico. Objetivo: Ofrecer una alternativa en la colocación de catéter Swan-Ganz mediante ultrasonido en menor tiempo y sin complicaciones. Material y métodos: Se realizó un estudio piloto, prospectivo, observacional, transversal y descriptivo. Se colocaron 26 pacientes con diversas patologías que ameritaban aporte aminérgico o inotrópico y catéter de arteria pulmonar. Se evaluaron los tiempos de colocación y complicaciones asociadas tras su colocación. Resultados: Se obtuvo media de 91.46 segundos de colocación (rango de 60-122 segundos) tras introducir la punta del catéter por venodisección y 0% de complicaciones en 26 pacientes. Discusión: El uso del ultrasonido ofrece un método alterno de colocación del catéter sin apoyo de fluoroscopia, curvas de monitoreo o presiones intracavitarias y reduce complicaciones. Conclusiones: La colocación de Swan-Ganz por ultrasonido es un método alterno y seguro con un tiempo medio de 91 segundos para su inserción. Se requiere una muestra mayor para determinar si es eficaz el método y quizás un estudio multicéntrico.

Abstract: Background: Use of a pulmonary artery catheter (Swan-Ganz) has been discussed because it does not offer changes in the mortality of critically ill patients; however, it is still a useful tool for hemodynamic monitoring. Objective: To offer an alternative in the placement of Swan-Ganz catheter by ultrasound in less time and without complications. Material and methods: A pilot, prospective, observational, cross-sectional and descriptive study was conducted. Placing 26 patients with various pathologies that required aminergic or inotropic delivery, a pulmonary artery catheter; evaluating placement times and associated complications after placement. Results: A mean of 91.46 seconds of placement (range of 60-122 seconds) was obtained after insertion of the tip of the catheter by venodisection and 0% of complications in 26 patients. Discussion: The use of ultrasound offers an alternate method of placement of the catheter without fluoroscopy support, monitoring curves or intracavitary pressures; and reduces complications. Conclusions: The placement of Swan-Ganz by ultrasound is an alternative and safe method for placement with an average time of 91 seconds in its insertion. A larger sample is required to determine if the method is effective and perhaps a multicenter study.

Resumo: Introdução: O uso de cateter na artéria pulmonar (Swan-Ganz) tem sido discutido por não oferecer mudanças na mortalidade de pacientes em estado crítico, no entanto, ainda é uma ferramenta útil para a monitorização hemodinâmica. Objetivo: Oferecer uma alternativa na colocação do cateter de Swan-Ganz com ultrassom em menos tempo e sem complicações. Material e métodos: Foi realizado um estudo piloto, prospectivo, observacional, transversal e descritivo. Colocando 26 pacientes com diferentes patologias que requeriam suporte aminérgico ou inotrópico e cateter de artéria pulmonar; avaliando o tempo e complicações associadas após a colocação. Resultados: Obteve-se uma média de 91.46 segundos de colocação (intervalo de 60-122 segundos) após a introdução da ponta do cateter por venodissecção e 0% de complicações em 26 pacientes. Discussão: O uso do ultrassom oferece um método alternativo de colocação do cateter sem apoio de fluoroscopia, curvas de monitoramento ou pressões intracavitárias; e reduz as complicações. Conclusões: A colocação do cateter de Swan Ganz por ultrassom é um método alternativo e seguro, com um tempo médio de 91 segundos na sua inserção. É necessária uma amostra maior para determinar se o método é eficaz e talvez um estudo multicêntrico.

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Epididymal sperm protein CRISP1 has the ability to both regulate murine CatSper, a key sperm calcium channel, and interact with egg-binding sites during fertilization. In spite of its relevance for sperm function, Crisp1-/-mice are fertile. Considering that phenotypes can be influenced by the genetic background, in the present work mice from the original mixed Crisp1-/- colony (129/SvEv*C57BL/6) were backcrossed onto the C57BL/6 strain for subsequent analysis of their reproductive phenotype. Whereas fertility and fertilization rates of C57BL/6 Crisp1-/- males did not differ from those reported for mice from the mixed background, several sperm functional parameters were clearly affected by the genetic background. Crisp1-/- sperm from the homogeneous background exhibited defects in both the progesterone-induced acrosome reaction and motility not observed in the mixed background, and normal rather than reduced protein tyrosine phosphorylation. Additional studies revealed a significant decrease in sperm hyperactivation as well as in cAMP and protein kinase A (PKA) substrate phosphorylation levels in sperm from both colonies. The finding that exposure of mutant sperm to a cAMP analog and phosphodiesterase inhibitor overcame the sperm functional defects observed in each colony indicated that a common cAMP-PKA signaling defect led to different phenotypes depending on the genetic background. Altogether, our observations indicate that the phenotype of CRISP1 null males is modulated by the genetic context and reveal new roles for the protein in both the functional events and signaling pathways associated to capacitation.

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The aim of the present study was to perform a qualitative and quantitative analysis of the effect of different sucrose concentrations combined with ethylene glycol in the preservation of vitrified porcine preantral follicles. Fragments of ovarian cortex were vitrified in cryotubes containing 200 µl of the vitrification solution (30% Ethylene Glycol; 20% Fetal Bovine Serum; 0 M-0.25 M - 0.75 M or 1 M sucrose) and stored in liquid nitrogen for a week. Histological analysis showed that after vitrification the number of normal follicles decreased compared to the fresh tissue (control). The percentage of normal primordial follicles was sucrose dose dependent. The percentage of normal primary follicles was similar in 0 M or 0.25 M sucrose, while higher concentrations (0.75 M and 1 M) increased significantly the percentage of abnormal follicles (p < 0.05). Morphometric analysis showed a statistically significant reduction in the total area of primordial follicles with 0.75 M sucrose and a significant increase in the cytoplasmic area of primordial follicles with 0 M sucrose (p < 0.05). The qualitative and the quantitative analysis appear to be a complementary tool when choosing a vitrification protocol. For our cryopreservation system - vitrification of ovarian cortex slices in cryotubes-the best vitrification medium was TCM 199-Hepes with 30% de ethylene glycol, 20% of Fetal Bovine Serum and 0 or 0.25 M sucrose. The present study shows that the use of high sucrose concentrations in the vitrification solution has a deleterious effect on the preservation of porcine preantral follicles contained in ovarian tissue. Consequently, its use at 0.75 M or 1 M wouldn't be recommended.

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