Modeling studies have predicted that coffee crop will be endangered by future global warming, but recent reports highlighted that high CO2 can mitigate heat impacts on coffee. This work aimed at ...identifying heat protective mechanisms promoted by CO2 in Coffea arabica (cv. Icatu and IPR108) and Coffea canephora cv. Conilon CL153. Plants were grown at 25/20°C (day/night), under 380 or 700 μL CO2 L(-1), and then gradually submitted to 31/25, 37/30, and 42/34°C. Relevant heat tolerance up to 37/30°C for both CO2 and all coffee genotypes was observed, likely supported by the maintenance or increase of the pools of several protective molecules (neoxanthin, lutein, carotenes, α-tocopherol, HSP70, raffinose), activities of antioxidant enzymes, such as superoxide dismutase (SOD), ascorbate peroxidase (APX), glutathione reductase (GR), catalase (CAT), and the upregulated expression of some genes (ELIP, Chaperonin 20). However, at 42/34°C a tolerance threshold was reached, mostly in the 380-plants and Icatu. Adjustments in raffinose, lutein, β-carotene, α-tocopherol and HSP70 pools, and the upregulated expression of genes related to protective (ELIPS, HSP70, Chape 20, and 60) and antioxidant (CAT, CuSOD2, APX Cyt, APX Chl) proteins were largely driven by temperature. However, enhanced CO2 maintained higher activities of GR (Icatu) and CAT (Icatu and IPR108), kept (or even increased) the Cu,Zn-SOD, APX, and CAT activities, and promoted a greater upregulation of those enzyme genes, as well as those related to HSP70, ELIPs, Chaperonins in CL153, and Icatu. These changes likely favored the maintenance of reactive oxygen species (ROS) at controlled levels and contributed to mitigate of photosystem II photoinhibition at the highest temperature. Overall, our results highlighted the important role of enhanced CO2 on the coffee crop acclimation and sustainability under predicted future global warming scenarios.
Rare earth elements (REEs) have been recently recognized as emergent pollutants in rivers. However, data regarding REE fluxes in association with either bed or suspended are scarce. To address this ...knowledge gap, we determined the concentrations and fluxes of La, Ce, Pr, Nd, Sm, Eu, Gd, Yb, Lu, Dy, Er, Ho, Tb, and Tm in bed and suspended sediment samples of a representative polluted Brazilian River. Sediment-associated data on REEs were placed in the context of corresponding background concentrations in soils under natural conditions along the Ipojuca watershed. Light rare earth elements (LREEs) comprised more than 94% of the total REEs associated with bed and suspended sediments. Suspended sediments accounted for more than 95% of the total REE flux. The Ce and Nd fluxes of about 7 t year
−1
underscore the importance of including REEs in future estimations of global suspended sediment-associated element fluxes. In contrast, bedload often transported less than 0.0007 t year
−1
of each REE. The main sources of pollution in the Ipojuca River are anthropogenic, likely due to domestic effluent and waste water from industrial and agricultural operations—major causes of sediment-associated Gd transport in polluted streams.
Water scarcity is the most significant factor limiting coffee production, although some cultivars can still have important drought tolerance. This study analyzed leaf transcriptomes of two coffee ...cultivars with contrasting physiological responses, Coffea canephora cv. CL153 and Coffea. arabica cv. Icatu, subjected to moderate (MWD) or severe water deficits (SWD). We found that MWD had a low impact compared with SWD, where 10% of all genes in Icatu and 17% in CL153 reacted to drought, being mainly down-regulated upon stress. Drought triggered a genotype-specific response involving the up-regulation of reticuline oxidase genes in CL153 and heat shock proteins in Icatu. Responsiveness to drought also included desiccation protectant genes, but primarily, aspartic proteases, especially in CL153. A total of 83 Transcription Factors were found engaged in response to drought, mainly up-regulated, especially under SWD. Together with the enrollment of 49 phosphatases and 272 protein kinases, results suggest the involvement of ABA-signaling processes in drought acclimation. The integration of these findings with complementing physiological and biochemical studies reveals that both genotypes are more resilient to moderate drought than previously thought and suggests the existence of post-transcriptional mechanisms modulating the response to drought.
Since the first description of the syndrome of sideroblastic anemia with immunodeficiency, fevers and development delay (SIFD), clinical pictures lacking both neurological and hematological ...manifestations have been reported. Moreover, prominent skin involvement, such as with relapsing erythema nodosum, is not a common finding. Up to this moment, no genotype and phenotype correlation could be done, but mild phenotypes seem to be located in the N or C part. B-cell deficiency is a hallmark of SIFD syndrome, and multiple others immunological defects have been reported, but not high levels of double negative T cells. Here we report a Brazilian patient with a novel phenotype of SFID syndrome, carrying multiple immune defects and harboring a novel mutation on TRNT1 gene.
Interaction between Equatorial Plasma Bubbles (EPBs) and midnight Brightness wave (MBW) was observed over Bom Jesus da Lapa (13.3° S, 43.5° W; Quasi-Dipole geomagnetic latitude of 14.1° S), using OI ...630 nm all-sky images. On the night of December 22nd, 2019, an EPB was seen propagating eastward in its fossil stage until it interacted with an MBW. After the interaction, the west walls of EPBs generated secondary instabilities that can be associated with gradient drift instability (GDI) and/or Kelvin–Helmholtz instabilities (KHI). We suggest that the MBW contributed to generate a shear in the EPBs walls due to changes in the thermospheric dynamics, such as neutral wind in the F layer height. Furthermore, spectral analysis of the all-sky images suggests that GDI and/or KHI generated turbulence and helped to dissipate the EPBs.
Graphical Abstract
Infection with Streptococcus pyogenes (S. pyogenes) can result in several diseases, particularly in children. S. pyogenes M protein is the major virulence factor, and certain regions of its ...N-terminus can trigger autoimmune sequelae such as rheumatic fever in susceptible individuals with untreated group A streptococcal pharyngitis. In a previous study, we utilized a large panel of human peripheral blood cells to define the C-terminal protective epitope StreptInCor (medical identity), which does not induce autoimmune reactions. We recently confirmed the results in HLA-transgenic mice. In the present study, we extended the experimental assays to outbred animals (Swiss mice). Herein, we demonstrate high titers of StreptInCor-specific antibodies, as well as appropriate T-cell immune responses. No cross-reaction to cardiac myosin was detected. Additionally, immunized Swiss mice exhibited 87% survival one month after challenge with S. pyogenes. In conclusion, the data presented herein reinforce previous results in humans and animals and further emphasize that StreptInCor could be an effective and safe vaccine for the prevention of S. pyogenes infections.
Resumo: O objetivo do trabalho foi estimar fatores associados ao bem-estar psicológico de travestis e mulheres transexuais. Estudo transversal com 602 travestis e pessoas transexuais em sete ...municípios do Estado de São Paulo, Brasil entre 2014 e 2015. Foi realizada seleção amostral com abordagem consecutiva e técnica bola de neve. A variável dependente foi bem-estar psicológico (WHOQOL-BREF) e as independentes foram: características sociodemográficas, modificações corporais, condições de saúde, violência e encarceramento. A análise de variância múltipla foi usada para identificar os fatores associados. A maioria tinha cor da pele preta ou parda e entre 25 e 39 anos de idade, até o Ensino Médio completo, renda individual de até dois salários mínimos e trabalhava, sendo 42,3% profissionais do sexo. Cerca de um quarto já foi presa. Em torno de um quarto fazia tratamento para HIV. O escore médio observado foi de 63,2 (IC95%: 61,8-64,6). Na análise múltipla, estiveram associados ao menor bem-estar psicológico: não ter endereço fixo, ter menor escolaridade, estar insatisfeita com as relações pessoais, suporte de amigos ou procedimentos transexualizadores realizados e ter sofrido violência verbal ou sexual. Enquanto piores condições de vida e de exposição à violência prejudicam o bem-estar psicológico de travestis e mulheres transexuais, a possibilidade de realizar transformações corporais desejadas e o respeito ao nome social interferem positivamente na avaliação que fazem de suas vidas.
Abstract: This article sought to estimate factors associated with the psychological well-being of transvestites and trans women. It is a cross-sectional study with 602 transvestites and trans individuals in seven cities in the state of São Paulo, Brazil from 2014 to 2015. We carried out a sample selection through a consecutive approach and using the snowball technique. The dependent variable was psychological well-being (WHOQOL-BREF) and the independent variables were: sociodemographic characteristics, body modifications, health conditions, violence and incarceration. We used a multiple variance analysis to identify associated factors. Most were black or brown and were aged between 25 and 39 years, had up to complete secondary education, individual income of up to two times the minimum wage and worked, and 42.3% were sex workers. Around one-quarter had been incarcerated. Around one-quarter were in treatment for HIV. Mean psychological well-being score was 63.2 (95%CI: 61.8-64.6). In the multiple analysis, the factors associated with lower psychological well-being were: not having a fixed address, having lower educational levels, being dissatisfied with personal relationships, friend support or the gender-affirming procedures they had undergone and having suffered verbal or sexual violence. While worse living conditions and exposure to violence harm the psychological well-being of transvestites and trans women, the possibility of undergoing desired body transformations and having their social name respected interfere positively in their evaluations of their lives.
Resumen: El objetivo fue estimar factores asociados al bienestar psicológico de travestis y mujeres transexuales. Se trata de un estudio transversal con 602 travestis y personas transexuales en siete municipios del estado de São Paulo, Brasil, entre 2014 y 2015. Se realizó una selección de muestras con un enfoque consecutivo y técnica bola de nieve. La variable dependiente fue bienestar sicológico (WHOQOL-BREF) y las independientes fueron: características sociodemográficas, modificaciones corporales, condiciones de salud, violencia y encarcelamiento. Se usó un análisis multivariante de variancia para identificar los factores asociados. La mayoría tenía el color de piel negro o eran mulatos, y entre 25 y 39 años de edad, con hasta la enseñanza media completa, renta individual de hasta dos salarios mínimos y trabajaba, siendo un 42,3% profesionales del sexo. Cerca de un cuarto ya estuvo presa. También cerca de un cuarto estaba con tratamiento para el VIH. Las puntuaciones medias de bienestar sicológico fue 63,2 (IC95%: 61,8-64,6). En el análisis múltiple, estuvieron asociados a un menor bienestar sicológico: no tener dirección fija, tener menor escolaridad, estar insatisfecha con las relaciones personales, apoyo de amigos o procedimientos transexualizadores realizados, y haber sufrido violencia verbal o sexual. Mientras que unas peores condiciones de vida y de exposición a la violencia perjudican el bienestar sicológico de travestis y mujeres transexuales, la posibilidad de realizar las transformaciones corporales deseadas y el respeto al nombre social interfieren positivamente en la evaluación que hacen de sus vidas.
We hypothesized that the coasting time may be beneficial to the quality of cumulus-oocyte complexes recovered from live ewes, as reported in cattle. The present study assessed the effect of coasting ...times on the quantity and quality of cumulus-oocyte complexes (COCs) in sheep. All ewes were subjected to the “Day 0 protocol”, followed by an ovarian stimulation (80 mg of pFSH in three decreasing doses), varying only the coasting time 12 (G12), 36 (G36), or 60 h (G60. In Experiment 1, data regarding follicular population was assessed. In Experiment 2, the COC quality was checked by their morphology, brilliant cresyl blue (BCB) test, evaluation of chromatin condensation pattern, and oocyte diameter. In Experiment 3, genes related to oocyte developmental competence were evaluated in BCB + COCs. The oocytes in the G60 group had more (P < 0.05) large follicles than the other groups and oocytes with a greater diameter than the G12. Oocyte morphology was similar (P > 0.05) among groups, as well as the BCB + COCs quantity. The G60-oocytes presented a better (P < 0.05) configuration of chromatin condensation compared with the other groups and a greater (P < 0.05) gene expression of BMP15, MATER, ZAR1, and PTGS2 compared with G12, and PTGS2 and HAS2 compared with G36 group. In conclusion, 60 h of coasting time positively affects the quality of COCs recovered after subjecting ewes to the “Day 0 protocol” and ovarian superstimulation. Implementing the appropriate coasting time to a given protocol can positively impact the in vitro embryo production outcomes in sheep.
•Ewes were subjected to an ovarian stimulation treatment varying only the coasting time (12, 36, or 60 h).•The G60-oocytes had more large follicles and oocytes with a larger diameter.•The G60-oocytes showed a better configuration of chromatin condensation pattern.•The G60-oocytes had a greater expression of BMP15, MATER, ZAR1, PTGS2, and HAS2.•60 h of coasting positively affects the quality of COCs from superstimulated ewes.
Supplementation with tetrahydrobiopterin, a nitric oxide synthase cofactor, may reduce microvascular endothelial dysfunction in severe sepsis. We studied whether tetrahydrobiopterin administration ...exerts beneficial effects in an ovine septic shock model.
Randomized animal study.
University hospital animal research laboratory.
Fourteen adult female sheep.
Fecal peritonitis was induced, and the sheep were randomized to receive tetrahydrobiopterin (n=7), given intravenously as 20 mg/kg boluses at 4 and 12 hrs after sepsis induction, or placebo (n=7). All animals were fluid resuscitated. The experiment was continued until death or for a maximum of 30 hrs.
In addition to standard hemodynamic assessment, the sublingual microcirculation was evaluated using sidestream dark-field videomicroscopy. The first bolus of tetrahydrobiopterin blunted the increase in heart rate and cardiac index seen in the control group without affecting mean arterial pressure, and the second bolus of tetrahydrobiopterin prevented the decreases in cardiac index and mean arterial pressure. The reduction in mixed venous blood oxygen saturation and the increase in blood lactate seen in the control group were also delayed. Tetrahydrobiopterin significantly attenuated the deterioration in perfused small vessel proportion and density, microvascular flow index, and the increase in microvascular heterogeneity observed in the control group. Tetrahydrobiopterin was associated with better preserved lung compliance and PaO2/FIO2 ratio, which were associated with a lower lung wet/dry weight ratio at the end of the study. Median survival time was significantly prolonged in the tetrahydrobiopterin group (25.0 vs. 17.8 hrs, p<.01).
In this clinically relevant model of sepsis, tetrahydrobiopterin supplementation attenuated the impairment in sublingual microvascular perfusion and permeability, which was accompanied by better preserved gas exchange, renal flow and urine output, and prolonged survival.
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