Clinical and ultrasound characteristics of deep endometriosis affecting sacral plexus.

OBJECTIVES: To describe sonomorphological changes and appearance of deep endometriosis (DE) affecting the nervous tissue of the sacral plexus (SP). METHODS: This was a retrospective study of symptomatic female patients who underwent radical resection of histologically confirmed DE affecting the SP who had undergone preoperative transvaginal sonography (TVS). Between 2019 and 2023 lesions were described based on the terms and definitions of the International Deep Endometriosis Analysis (IDEA) group. DE affecting the SP was diagnosed on ultrasound by TVS, when sonographic criteria of DE were visualized in conjunction with fibers of the SP and the presence of related symptoms, so-called sacral radiculopathy. Clinical symptoms, ultrasound features and histological confirmation were analyzed for each patient included. RESULTS: Twenty-seven patients with DE infiltrating the sacral plexus were identified in 2 contributing tertiary referral centers. Median age was 37 (range, 29-45) years and all of the patients were symptomatic and presented one or more of the following neurological symptoms: dysaesthesia in the ipsilateral lower extremity (n = 17), paraesthesia in the ipsilateral lower extremity (n = 10), chronic pelvic pain radiating in the ipsilateral lower extremity (n = 9), chronic pain radiating in the pudendal region (n = 8), weakness in the ipsilateral lower extremities (n = 3). All DE lesions affecting the SP were purely solid tumors in the posterior parametrium in direct contact with or infiltrating the S1 and/or S2 and/or S3 and/or S4 roots of the SP. The median of the largest diameter of the DE nodules was 35 mm and echogenicity of the DE nodules was in 86% (n=23) non-uniform. All but one of them contained hyperechoic areas. The shape of the lesions was in 89% (n=24)irregular. Only one lesion exhibited lobulated form, all other irregular lesion showed spiculated appearance. 74% (n=20) of the nodules gave an acoustic shadow, all of them internal. With color or power Doppler examination 78% (n=21) of the nodules showed no signal (Color Score 1). The remaining 22% (n=6) of the lesions manifested only a minimal color content (Color Score 2). According to pattern recognition, most DE nodules were a purely solid non-uniform hypoechoic nodule with hyperechoic areas, internal shadows and irregular spiculated contours and poorly vascularized at color/power Doppler examination. CONCLUSION: The ultrasound finding of a parametrial unilateral solid non-uniform hypoechoic nodule with hyperechoic areas and possible internal shadowing as well as irregular spiculated contours demonstrating poor vascularization on Doppler examination in proximity or involving the structures of the SP reflects DE affecting these structures. This article is protected by copyright. All rights reserved.

Visualization of sacral nerve roots and sacral plexus on gynecological transvaginal ultrasound: feasibility study.

OBJECTIVE: To investigate the feasibility of identifying and measuring the normal sacral plexus (SP) on gynecological transvaginal ultrasound (TVS) examination. METHODS: This was a prospective observational study conducted at a single tertiary gynecological referral center, including consecutive women undergoing TVS for various indications between November 2021 and January 2022. A standardized assessment of the pelvic organs was performed and the presence of any congenital or acquired uterine pathology or ovarian abnormality was recorded. Visualization of the right and left SP was attempted in all cases. The success rate and the time needed to identify the SP were recorded and measurements of the SP were made. RESULTS: A total of 326 patients were included in the study. In all women, the SP was identified successfully on at least one side. SP were visualized bilaterally in 317 (97.2% (95% CI, 94.4-98.5%)) women. Only the right SP was seen in 3/326 (0.9% (95% CI, 0.2-2.7%)) and only the left in 6/326 (1.8% (95% CI, 0.6-4.0%)) (P = 0.5048). There was no significant difference in the median time required to visualize the right vs left SP (9.0 (interquartile range (IQR), 8.0-10.0) s  vs 9.0 (IQR, 8.0-10.0) s; P = 0.0770). The median transverse diameter of the right SP was 15.0 (IQR, 14.2-15.6) mm and that of the left SP was 14.9 (IQR, 14.4-15.6) mm. CONCLUSIONS: We describe a novel method which allows for the consistent and rapid identification of the SP on TVS. Integrating assessment of the SP into routine pelvic TVS may be helpful particularly for women suffering from deep endometriosis. © 2023 The Authors. Ultrasound in Obstetrics & Gynecology published by John Wiley & Sons Ltd on behalf of International Society of Ultrasound in Obstetrics and Gynecology.

Some considerations on the dependence to numerical schemes of Lagrangian radionuclide transport models for the aquatic environment.

Lagrangian models present several advantages over Eulerian models to simulate the transport of radionuclides in the aquatic environment in emergency situations. A radionuclide release is simulated as a number of particles whose trajectories are calculated along time and thus these models do not require a spatial discretization (although it is always required in time). In this paper we investigate the dependence of a Lagrangian model output with the grid spacing which is used to calculate concentrations from the final distribution of particles, with the number of particles in the simulation and with the interpolation schemes which are required because of the discrete nature of the water circulation data used to feed the model. Also, a Lagrangian model may describe the exchanges of radionuclides between phases (liquid and solid), which is done in terms of transition probabilities. The dependence of these probabilities with time step is analyzed as well. It was found that the optimum grid size used to calculate concentrations should be carefully checked, and that temporal interpolation is more significant than spatial interpolation to obtain a more accurate solution. A method to estimate the number of particles required to have a certain accuracy level is proposed. Finally, it was found that for low sediment concentrations and small radionuclide kd, exact equations for the transition probabilities should be used; and that phase transitions introduce a stability condition as in Eulerian models.

Fukushima 137Cs releases dispersion modelling over the Pacific Ocean. Comparisons of models with water, sediment and biota data.

A number of marine radionuclide dispersion models (both Eulerian and Lagrangian) were applied to simulate 137Cs releases from Fukushima Daiichi nuclear power plant accident in 2011 over the Pacific at oceanic scale. Simulations extended over two years and both direct releases into the ocean and deposition of atmospheric releases on the ocean surface were considered. Dispersion models included an embedded biological uptake model (BUM). Three types of BUMs were used: equilibrium, dynamic and allometric. Model results were compared with 137Cs measurements in water (surface, intermediate and deep layers), sediment and biota (zooplankton, non-piscivorous and piscivorous fish). A reasonable agreement in model/model and model/data comparisons was obtained.

Biocatalysis with Escherichia coli-overexpressing cyclopentanone monooxygenase immobilized in polyvinyl alcohol gel.

UNLABELLED: This is the first reported study on the immobilization of living recombinant Escherichia coli cells that overexpress cyclopentanone monooxygenase in polyvinyl alcohol gel particles LentiKats®. Immobilized cells overexpressing cyclopentanone monooxygenase have been used as a model of biocatalyst for enantioselective Baeyer-Villiger biooxidation of rac-bicyclo[3.2.0]hept-2-en-6-one into regioisomeric lactones. This process is useful for the syntheses of cytostatic sarkomycin, several prostaglandins and other biologically active compounds. The original technique for qualitative analysis of enzyme expression within free cells and cells entrapped in LentiKats® using SDS-PAGE was developed and used for verification of optimal conditions for the induction of cyclopentanone monooxygenase. Here, we successfully performed six repeated batch Baeyer-Villiger biooxidations utilizing entrapped cells using 40% (w/v) polyvinyl alcohol gel particles in flasks with baffles. The latter conditions have been found to be the most appropriate achieving optimal oxygen transfer within LentiKats®. Moreover, immobilized cells retained their catalytic efficiency over six reaction cycles, while the catalytic efficiency of free cells decreased after three reaction cycles. SIGNIFICANCE AND IMPACT OF THE STUDY: Immobilization in polyvinylalcohol gel particles is desirable technique with presumptive impact on industrial applications of recombinant whole-cell Baeyer-Villiger monooxygenases as biocatalysts for production of bioactive compounds and precursors of potentially new drugs. An original immobilization of cells E. coli with overproduced Baeyer-Villiger monooxygenase improved their stability in repetitive batch biooxidations as compared to free cells. Detected autoinduction of recombinant enzyme in pET22b+ plays significant role in application of immobilized cells as it may increase specific activity of cells in repetitive use under growing reaction conditions. Original technique for qualitative analysis of enzyme expression within immobilized cells was developed.

Entrenador mioeléctrico de prótesis para amputados de brazo y mano / Myoelectric prostheses trainer for hand and arm amputees

Introducción: Los objetivos del entrenador mioeléctrico virtual son el evaluar la adecuación de una prótesis mioeléctrica para amputados de mano y posibilitar un aprendizaje previo de manejo de prótesis a bajo coste. Material y métodos: Se emplean equipos de adquisición de señales de electromiograma de desarrollo propio, un ordenador compatible convencional y un conjunto de programas que controlan el sistema, distinguen los patrones de electromiograma y representan una imagen en tres dimensiones de una prótesis de mano. El sistema puede hacerse funcionar sobre cualquier PC actual. Se define un protocolo de ensayos sobre pacientes. El programa registra datos sobre la evolución de los pacientes. Resultados preliminares y discusión: Se ha probado el sistema sobre dos personas sin amputación que han realizado entrenamientos con éxito, consiguiendo controlar apertura y cierre de la mano y giro de la muñeca en ambos sentidos. Se emplea tan sólo la señal de dos canales diferenciales de electromiograma registrados en dos músculos antagonistas del brazo. Las prestaciones de sistema pueden ampliarse. Conclusiones: Se han desarrollado equipos de bajo coste y programas que instalados sobre un ordenador compatible consiguen funcionar como un entrenador de prótesis mioeléctricas. Estos sistemas son adecuados para valorar la utilidad en un paciente de una prótesis mioeléctrica y realizar aprendizajes previos sobre su uso. El bajo coste y la sencillez del sistema permiten su posible utilización en el domicilio del paciente, facilitando y acortando el período de aprendizaje (AU)

Functional order of assembly of herpes simplex virus DNA replication proteins into prereplicative site structures.

Herpes simplex virus replicates its DNA within nuclear structures called replication compartments. In contrast, in cells in which viral DNA replication is inhibited, viral replication proteins localize to punctate structures called prereplicative sites. We have utilized viruses individually mutated in each of the seven essential replication genes to assess the function of each replication protein in the assembly of these proteins into prereplicative sites. We observed that four replication proteins, UL5, UL8 UL52, and UL9, are necessary for the localization of ICP8 (UL29) to prereplicative sites natural infection conditions. Likewise, four of the seven viral DNA replication proteins, UL5, UL52, UL9, and ICP8, are necessary for the localization of the viral DNA polymerase to prereplicative sites. On the basis of these results, we present a model for prereplicative site formation in infected cells in which the helicase-primase components (UL5, UL8, and UL52), the origin-binding protein (UL9), and the viral single-stranded DNA-binding protein (ICP8) assemble together to initiate the process. This is followed by the recruitment of the viral polymerase into the structures, a step facilitated by the polymerase accessory protein, UL42. Host cell factors can apparently substitute for some of these viral proteins under certain conditions, because the viral protein requirements for prereplicative site formation are reduced in transfected cells and in infected cells treated with drugs that inhibit DNA synthesis.

The herpes simplex virus type 1 regulatory protein ICP0 enhances virus replication during acute infection and reactivation from latency.

ICP0 is a potent activator of herpes simplex virus type 1 gene expression in transient assays and in productive infection. A role for ICP0 in reactivation from latency in vivo has also been suggested on the basis of the observation that viruses with mutations in both copies of the diploid gene for ICP0 reactivate less efficiently than wild-type virus. Because the ICP0 gene is contained entirely within the coding sequences for the latency-associated transcripts (LATs), ICP0 mutants also contain mutations in LAT coding sequences. This overlap raises the question of whether mutations in ICP0 or the LATs, which have also been implicated in reactivation, are responsible for the reduced reactivation frequencies characteristic of ICP0 mutants. Two approaches were taken to examine more definitively the role of ICP0 in the establishment and reactivation of latency. First, a series of ICP0 nonsense, insertion, and deletion mutant viruses that exhibit graded levels of ICP0-specific transactivating activity were tested for parameters of the establishment and reactivation of latency in a mouse ocular model. Although these mutants are ICP0 LAT double mutants, all nonsense mutants induced the synthesis of near-wild-type levels of the 2-kb LAT, demonstrating that the nonsense linker did not disrupt the synthesis of this LAT species. All mutants replicated less efficiently than the wild-type virus in mouse eyes and ganglia during the acute phase of infection. The replication efficiencies of the mutants at these sites corresponded well with the ICP0 transactivating activities of individual mutant peptides in transient expression assays. All mutants exhibited reduced reactivation frequencies relative to those of wild-type virus, and reactivation frequencies, like replication efficiencies in eyes and ganglia, correlated well with the level of ICP0 transactivating activity exhibited by individual mutant peptides. The amount of DNA of the different mutants varied in latently infected ganglia, as demonstrated by polymerase chain reaction analysis. No correlation was evident between reactivation frequencies and the levels of viral DNA in latently infected ganglia. Thus, replication and reactivation efficiencies of ICP0 mutant viruses correlated well with the transactivating efficiency of the corresponding mutant peptides. In a second approach to examining the role of ICP0 in latency, a single copy of the wild-type gene for ICP0 was inserted into the genome of an ICP0- LAT- double mutant, 7134, which exhibits a marked impairment in its ability to replicate in the mouse eye and reactivate from latency.(ABSTRACT TRUNCATED AT 400 WORDS)

Ras controls coupling of growth factor receptors and protein kinase C in the membrane to Raf-1 and B-Raf protein serine kinases in the cytosol.

A dominant negative mutant of Ras, M17 Ras, was used to study the role of Ras in receptor coupling of Raf-1 and B-Raf protein serine/threonine kinases (PSKs). We found that mutant Ras blocks serum- and 12-O-tetradecanoyl phorbol 13-acetate-induced activation of Raf-1 kinase in NIH3T3 cells and Raf-1 as well as B-Raf PSK stimulation by nerve growth factor (NGF) in PC12 pheochromocytoma cells. Mitogen stimulation of Raf kinase was measured by determination of Raf hyperphosphorylation and activity towards exogenous substrates and both of these events were inhibited in cells expressing M17 Ras. In contrast, tyrosine phosphorylation of a direct substrate of activated tyrosine kinase receptors, phospholipase C-gamma 1 (PLC-gamma 1), was unaffected. These data indicate that tyrosine phosphorylation of PLC-gamma 1 is not sufficient for growth induction in NIH3T3 cells and that Ras mediates signal transfer from activated membrane receptors to Raf kinases in the cytosol. As activated Raf induced differentiation in PC12 cells expressing M17 Ras we conclude that Raf kinase activation may be sufficient to account for this aspect of NGF function.

In vivo phosphorylation and membrane association of the fyn proto-oncogene product in IM-9 human lymphoblasts.

The protein product of the src-related proto-oncogene, fyn, was isolated from IM-9 cells with antibodies specific for the amino-terminal 22 residues of the fyn protein. Peptide mapping demonstrated that the fyn protein was distinct from the closely related c-src and c-fgr proteins. The fyn protein from IM-9 cells incorporated [3H]myristate in vivo and was found to be membrane associated. Phosphoamino acid analysis demonstrated that the fyn protein from IM-9 cells was phosphorylated in vivo predominantly on tyrosine and threonine with only a small amount of phosphoserine detected. the major chymotryptic phosphopeptide of the fyn protein was phosphorylated exclusively on tyrosine. This peptide was specifically precipitated by antibodies directed against a peptide modeled on the closely related carboxy termini of the c-src and fyn proteins. These results provide direct evidence for phosphorylation of tyrosine-531 in the carboxy-terminal chymotryptic peptide of the fyn protein. Phosphorylation of the corresponding site in the closely related c-src protein (tyrosine-527) represses src kinase activity and transforming ability. Loss of the phosphorylation site at tyrosine-531 may similarly contribute to the transforming abilities of carboxy-terminal deletion mutants of the fyn protein.