Molecular characterization and expression of a novel human leukocyte cell-surface marker homologous to mouse Ly-9

Producción Científica.Ly-9 is a mouse cell-surface glycoprotein that is selectively expressed on thymocytes and on mature T and B lymphocytes. Ly-9 belongs to the CD2 subset of the immunoglobulin superfamily, an emerging family of cell signaling receptors. Recently, a partial human Ly-9 complementary DNA (cDNA) sequence has been described. Full-length cDNA clones were isolated that included the initiation codon, the sequence encoding the full signal peptide, and 14 amino acids more in the cytoplasmic domain than in the previously reported clone. The predicted extracellular domain of human Ly-9 contains 4 immunoglobulinlike domains, similar to those in mouse Ly-9. Northern blot analysis revealed that the human Ly-9 messenger RNA (2.6 kb) is expressed predominantly in lymph node, spleen, thymus, and peripheral blood leukocytes. Four monoclonal antibodies (mAbs) were raised against human Ly-9 by immunizing mice with the pre-B-cell line 300.19 stably transfected with human Ly-9 full-length cDNA. These mAbs strongly stained the surfaces of cells transfected with human Ly-9 cDNA but not of untransfected cells. Human Ly-9 expression was restricted to T and B lymphocytes and thymocytes, with the highest levels of expression on CD4(+)CD8(-) and CD4(-)CD8(+) thymocytes. Monocytes, granulocytes, platelets, and red blood cells were uniformly negative for Ly-9. These mAbs immunoprecipitated major polypeptides of 120 kd from the transfected cells and 120 kd and 100 kd from B-cell line Daudi, probably because of the cell-surface-expressed isoforms. These data demonstrate that human Ly-9 is a new marker for the study of normal and malignant leukocyte

Impact of the functional CD5 polymorphism A471V on the response of chronic lymphocytic leukaemia to conventional chemotherapy regimens.

Chronic lymphocytic leukaemia (CLL) represents an abnormal clonal expansion of mature antigen-experienced CD5+ B1a cells (Chiorazzi et al, 2005), which present with a highly heterogeneous clinical course depending on associated chromosomal aberrations, somatic mutations within the immunoglobulin variable heavy chain genes (IGHV), and surface CD38 or intracytoplasmic ZAP-70 expression. Given that key signalling components of the B-cell receptor (BCR) are relevant contributors to the variable clinical behaviour of CLL (Stevenson et al, 2011) we explored the influence of functionally relevant germline CD5 variants on CLL prognosis

Hide Glue Applicator

This study investigates the challenges inherent in applying hide glue in the crafting of violin and other stringed instruments. Hide glue, derived from animal collagen and protein, is essential for creating durable bonds that allow for necessary adjustments during fabrication. However, its meticulous heating and maintenance requirements pose logistical obstacles for luthiers lacking viable alternatives. To tackle this issue comprehensively, our project comprises several key components. Initially, we conducted an in-depth analysis of the hide glue application process, delineating procedural steps and techniques to establish our design criteria and constraints. This foundational understanding formed the basis for further exploration. Additionally, preliminary research involved literature review, interviews with seasoned luthiers, and an investigation into historical practices to pinpoint challenges faced by practitioners. Subsequently, our project methodology, spanning ideation through manufacturing and testing phases, was outlined. During ideation, a diverse array of designs and concepts was generated to address stakeholder needs, which were then quantitatively narrowed down to arrive at our final design. This ultimate solution involved a modified syringe gun equipped with resistance heaters embedded in the barrel, controlled by a microcontroller affixed to the handle. Following manufacturing and assembly, rigorous testing was undertaken to validate that our design met the requisite standards for hide glue application. Through this systematic approach, our study aims to provide insights and potential solutions to enhance the efficiency of hide glue application in the craftsmanship of stringed instruments

Dual PI3K/mTOR inhibition is required to effectively impair microenvironment survival signals in mantle cell lymphoma

Phosphatidylinositol-3-kinase (PI3K)/Akt/mammalian target of rapamycin (mTOR) pathway activation contributes to mantle cell lymphoma (MCL) pathogenesis and drug resistance. Antitumor activity has been observed with mTOR inhibitors. However, they have shown limited clinical efficacy in relation to drug activation of feedback loops. Selective PI3K inhibition or dual PI3K/mTOR catalytic inhibition are different therapeutic approaches developed to achieve effective pathway blockage. Here, we have performed a comparative analysis of the mTOR inhibitor everolimus, the pan-PI3K inhibitor NVP-BKM120 and the dual PI3K/mTOR inhibitor NVP-BEZ235 in primary MCL cells. We found NVP-BEZ235 to be more powerful than everolimus or NVP-BKM120 in PI3K/Akt/mTOR signaling inhibition, indicating that targeting the PI3K/Akt/mTOR pathway at multiple levels is likely to be a more effective strategy for the treatment of MCL than single inhibition of these kinases. Among the three drugs, NVP-BEZ235 induced the highest change in gene expression profile. Functional validation demonstrated that NVP-BEZ235 inhibited angiogenesis, migration and tumor invasiveness in MCL cells. NVP-BEZ235 was the only drug able to block IL4 and IL6/STAT3 signaling which compromise the therapeutic effect of chemotherapy in MCL. Our findings support the use of the dual PI3K/mTOR inhibitor NVP-BEZ235 as a promising approach to interfere with the microenvironment-related processes in MCL

La Carta Medellín promulgada por el WUF7

La Carta Medellín fue el documento oficial de conclusiones que quedó como testimonio de las sesiones correspondientes al Séptimo Foro Urbano Mundial que tuvo lugar en Medellín entre el 5 y el 9 de abril pasados, organizado por ONU-Hábitat en alianza con la Alcaldía de Medellín y el Ministerio de la vivienda. El texto de 170 páginas, se supone, recoge los insumos más importantes de los diálogos, asambleas y mesas redondas que tuvieron lugar en el marco de ese imponente evento que movilizó decenas de miles de visitantes y millones de dólares en financiación.The Medellín Charter was the official document of conclusions that remained as testimony of the sessions corresponding to the Seventh World Urban Forum that took place in Medellin between April 5 and 9, organized by UN-Habitat in alliance with the Mayor's Office of Medellín and the Ministry of housing. The text of 170 pages, it is supposed, collects the most important inputs of the dialogues, assemblies and round tables that took place within the framework of that impressive event that mobilized tens of thousands of visitors and millions of dollars in financing

Atypical Dengue Fever with Severe Hematological Manifestations: A Case from the Rio Grande Valley

Background: Dengue fever, a mosquito-borne viral illness, is endemic in tropical regions, including border regions like the Rio Grande Valley while often self-limited, severe presentations such as dengue hemorrhagic fever and dengue shock syndrome highlight its challenges and complexities. This report describes an atypical dengue case with severe hematological manifestations, underscoring the diagnostic challenges and the importance of early recognition, multidisciplinary evaluation, and evidence-based management. Case Presentation: A 22-year-old Hispanic female with no significant past medical history presented to the ED with hematemesis and fever following her travel to Monterrey, Mexico. Initial symptoms included high fever (107.6°F), chills, diarrhea, vomiting, severe headaches, light sensitivity, and hematuria. She tested positive for dengue at a private clinic in Matamoros, Mexico, and was treated symptomatically before presenting to the U.S. hospital. Laboratory findings revealed severe leukopenia, neutropenia, mild thrombocytopenia, and transaminitis without clinical evidence of plasma leakage. Her physical exam was notable for petechial rash and ecchymosis over the extensor surfaces of the upper extremities. Despite mild thrombocytopenia, she experienced hematuria and hematemesis, prompting evaluation for bleeding risks. Bone marrow biopsy findings included erythroid hypoplasia, megakaryocytic hyperplasia, and a reactive myeloid maturation pattern, ruling out primary hematologic disorders. Cytogenetic studies identified a Robertsonian translocation, deemed a constitutional abnormality unrelated to her presentation. The patient was managed with hydration, antipyretics, antiemetics, and supportive care. Her symptoms and laboratory abnormalities improved by day five, and she was discharged in stable condition with outpatient follow-up. Conclusion: This case highlights the importance of recognizing atypical dengue presentations, especially in endemic-bordering regions like the Rio Grande Valley, TX. Severe hematological abnormalities, such as leukopenia and neutropenia, may mimic other systemic or hematologic conditions, necessitating a thorough diagnostic workup. Multidisciplinary evaluation, including bone marrow biopsy and cytogenetic studies, plays a vital role in ruling out alternative etiologies. Evidence-based supportive care, including hydration and close monitoring, remains the cornerstone of treatment. This report underscores the importance of early diagnosis and supportive care for optimal outcomes and contributes to understanding dengue’s variable clinical presentations

Identification of novel follicular dendritic cell sarcoma markers, FDCSP and SRGN, by whole transcriptome sequencing

Follicular dendritic cell (FDC)-sarcoma is a rare neoplasm with morphologic and phenotypic features of FDCs. It shows an extremely heterogeneous morphology, therefore, its diagnosis relys on the phenotype of tumor cells. Aim of the present study was the identification of new specific markers for FDC-sarcoma by whole transcriptome sequencing (WTS). Candidate markers were selected based on gene expression level and biological function. Immunohistochemistry was performed on reactive tonsils, on 22 cases of FDC-sarcomas and 214 control cases including 114 carcinomas, 87 soft tissue tumors, 5 melanomas, 5 thymomas and 3 interdigitating dendritic cell sarcomas. FDC secreted protein (FDCSP) and Serglycin (SRGN) proved to be specific markers of FDC and related tumor. They showed better specificity and sensitivity values than some well known markers used in FDC sarcoma diagnosis (specificity: 98.6%, and 100%, respectively; sensitivity: 72.73% and 68.18%, respectively). In our cohorts CXCL13, CD21, CD35, FDCSP and SRGN were the best markers for FDC-sarcoma diagnosis and could discriminate 21/22 FDC sarcomas from other mesenchymal tumors by linear discriminant analysis. In summary, by WTS we identified two novel FDC markers and by the analysis of a wide cohort of cases and controls we propose an efficient marker panel for the diagnosis of this rare and enigmatic tumor

UNA BELLA RELACIÓN ENTRE LA CONJETURA DE GOLBACH Y EL TEOREMA DE DIRICHLET

This article describes the process that was undertaken to find an important relationship between the Goldbach Conjecture and Dirichlet theorem. Perhaps it could be suppressed the first part of this article, but I do not know made in order to show the historical process that he ran to get the result. It is hoped that the results presented actually show the effort made to attain an test that lasted many years in achieved.En este artículo se muestra el proceso que se llevó a cabo la encontrar una importante relación entre la Conjetura de Goldbach y el teorema de Dirichlet. Quizá  podría suprimirse la primer parte de artículo, pero no se hizo con el fin de  mostrar el proceso histórico que se  recorrió para llegar al resultado.  Se espera que los resultados presentados  muestren en realidad el esfuerzo hecho para lograr una prueba que duró muchos años en lograrse

UNA BELLA RELACIÓN ENTRE LA CONJETURA DE GOLBACH Y EL TEOREMA DE DIRICHLET

This article describes the process that was undertaken to find an important relationship between the Goldbach Conjecture and Dirichlet theorem. Perhaps it could be suppressed the first part of this article, but I do not know made in order to show the historical process that he ran to get the result. It is hoped that the results presented actually show the effort made to attain an test that lasted many years in achieved.En este artículo se muestra el proceso que se llevó a cabo la encontrar una importante relación entre la Conjetura de Goldbach y el teorema de Dirichlet. Quizá  podría suprimirse la primer parte de artículo, pero no se hizo con el fin de  mostrar el proceso histórico que se  recorrió para llegar al resultado.  Se espera que los resultados presentados  muestren en realidad el esfuerzo hecho para lograr una prueba que duró muchos años en lograrse

Solucion de la ecuacion con retardo de primer orden por medio de la transformada de laplace

En la modelación en diversos fenómenos de la naturaleza ha demostrado que las ecuaciones con retardo son una herramienta poderosa que muestra datos que en general co n las ecuaciones de tiempo presente no se tienen. En general el estudio cualitativo es la herramienta que aborda el estudio de las ecuaciones, sin embargo, a veces algunas ecuaciones se pueden resolver utilizando diversas herramientas matemáticas. En este artículo utilizamos la Transformada de Laplace para resolver un caso particular de la ecuación con retardo constante de primer orden