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OBJECTIVE: To evaluate whether anti-PL7 and anti-PL12 autoantibodies are associated with a greater extent of the fibrotic component of ILD in ASSD patients. METHODS: Patients with ILD-ASSD who were positive for one of the following autoantibodies: anti-Jo1, anti-PL7, anti-PL12, and anti-EJ were included. Clinical manifestations, CPK levels, pulmonary function tests, and HCRT assessments were prospectively collected according to the Goh index. The fibrotic, inflammatory, and overall extension of the Goh index and DLCO were assessed by multiple linear analyses and compared between ASSD antibody subgroups. RESULTS: Sixty-six patients were included; 17 were positive for anti-Jo1 (26%), 17 for anti-PL7 (26%), 20 for anti-PL12 (30%), and 9 (14%) for anti-EJ. Patients with anti-PL7 and anti-PL12 had a more extensive fibrotic component than anti-Jo1. Anti-PL7 patients had a 7.9% increase in the fibrotic extension (cß = 7.9; 95% CI 1.863, 13.918), and the strength of the association was not modified after controlling for sex, age, and time of disease evolution (aß = 7.9; 95% CI 0.677, 15.076) and also was associated with an increase in ILD severity after adjusting for the same variables, denoted by a lower DLCO (aß = - 4.47; 95% CI - 8.919 to - 0.015). CONCLUSIONS: Anti-PL7-positive ASSD patients had more extensive fibrosis and severe ILD than the anti-Jo1 subgroup. This information is clinically useful and has significant implications for managing these patients, suggesting the need for early consideration of concurrent immunosuppressive and antifibrotic therapy.

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Dendroctonus bark beetles (Scolytinae) are one of the most important disturbance agents of coniferous forests in North and Central America. These beetles spend their lives almost entirely under the tree bark, and their survival and reproductive success depend on their ability to overcome the toxic effect of the trees' oleoresin. The cytochromes P450 (CYPs) are associated with the detoxification process of xenobiotics, as well as other physiological processes. Different cytochromes (families 4, 6, and 9) in the Dendroctonus species have been expressed under several experimental conditions; nevertheless, the expression time-course of these genes is unknown. To explore the induction speed of CYPs, we evaluated the relative expression of the CYP6BW5, CYP6DG1, CYP6DJ2, CYP9Z18, and CYP9Z20 genes at the early hours of drilling and settling into a tree (1, 2, 4, 6, 8, 12, 18 h) both in females and males, solitary or paired, of the bark beetle Dendroctonus rhizophagus Thomas and Bright. Our findings show that the five genes were rapidly overexpressed in the early hours (1 to 6 h) in both sexes and in solitary and paired conditions, suggesting their participation in the detoxification process. Additionally, the CYPs expression shows up- and down-regulation patterns through these short times, suggesting their probable participation in other physiological processes as the biosynthesis of hormones, pheromones or compounds related to reproduction.

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Las soluciones parenterales de gran volumen (SPGV) son formulaciones líquidas de administración intravenosa, en las cuales la esterilidad y apirogenicidad son requisitos indispensables. De manera semejante, los envases que las contienen deben cumplir estrictas especificaciones de manera de asegurar la integridad y la seguridad de estos productos durante toda su vida útil y, de este modo, disminuir la probabilidad de contaminación que pudiera poner en riesgo la salud de los pacientes. Por este motivo, para verificar el cumplimiento de la normativa vigente y evaluar la calidad, se realizó un estudio horizontal de mercado de productos de SPGV conteniendo metronidazol 500 mg/ 100 ml y ciprofloxacina 200 mg/100 ml en presentaciones de 100 ml. Los ensayos realizados fueron los establecidos por la Disposición ANMAT 1149/97. Los resultados demostraron que, de los cinco laboratorios incluidos en el estudio, uno debe modificar el material de sus envases a fin de evitar la permeabilidad al vapor de agua y los otros cuatro deben rever la capacidad de escurrimiento y colapsabilidad o incluir en su rótulo la leyenda indicada en el inciso E 3.1.4 de la citada norma, en cuanto a la obligación de ser administrados en forma aséptica con filtración del aire de ventilación. El presente trabajo resalta la importancia de las acciones de vigilancia activa llevada a cabo por la ANMAT para asegurar la eficacia, seguridad y calidad de los productos comercializados dentro de su ámbito regulatorio

Large Volume Parenterals (LVP's) are aqueous solutions intended for intravenous use. Sterility and being pyrogen-free are both essential requirements. Similarly, the containers of these solutions must meet strict specifications in order to ensure the integrity and safety of these products throughout their useful life and, thus, reduce the likelihood of contamination that could put at risk the patients' health. For this reason, to verify compliance with current regulations and assess quality, a horizontal market study of SPGV products containing metronidazole 500 mg / 100 ml and ciprofloxacin 200 mg / 100 ml in 100 ml presentations was conducted. The tests carried out were those established by Regulation ANMAT 1149/97. The results showed that, one of the five laboratories included in the study, must modify the material of the containers to avoid water vapor permeability and the other four must review the capacity of runoff and collapsibility or include in the label the legend indicated in the subsection. E 3.1.4 of the aforementioned standard, regarding the obligation to be aseptically administered with ventilation air filtration. This work highlights the importance of active surveillance actions carried out by ANMAT to ensure the effectiveness, safety and quality of products marketed within its regulatory scope

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Bradyrhizobium diazoefficiens, a nitrogen-fixing endosymbiont of soybeans, is a model strain for studying rhizobial denitrification. This bacterium can also use nitrate as the sole nitrogen (N) source during aerobic growth by inducing an assimilatory nitrate reductase encoded by nasC located within the narK-bjgb-flp-nasC operon along with a nitrite reductase encoded by nirA at a different chromosomal locus. The global nitrogen two-component regulatory system NtrBC has been reported to coordinate the expression of key enzymes in nitrogen metabolism in several bacteria. In this study, we demonstrate that disruption of ntrC caused a growth defect in B. diazoefficiens cells in the presence of nitrate or nitrite as the sole N source and a decreased activity of the nitrate and nitrite reductase enzymes. Furthermore, the expression of narK-lacZ or nirA-lacZ transcriptional fusions was significantly reduced in the ntrC mutant after incubation under nitrate assimilation conditions. A B. diazoefficiens rpoN 1/2 mutant, lacking both copies of the gene encoding the alternative sigma factor σ54, was also defective in aerobic growth with nitrate as the N source as well as in nitrate and nitrite reductase expression. These results demonstrate that the NtrC regulator is required for expression of the B. diazoefficiens nasC and nirA genes and that the sigma factor RpoN is also involved in this regulation.

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