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Immunotherapy is deemed one of the most powerful therapeutic approaches to treat cancer. However, limited response and tumor specificity are still major challenges to address. Herein, mannosylated polycations targeting mannose receptor- are developed as vectors for plasmid DNA (pDNA)-based vaccines to improve selective delivery of genetic material to antigen-presenting cells and enhance immune cell activation. Three diblock glycopolycations (M15A12, M29A25, and M58A45) and two triblock copolymers (M29A29B9 and M62A52B32) are generated by using mannose (M), agmatine (A), and butyl (B) derivatives to target CD206, complex nucleic acids, and favor the endosomal escape, respectively. All glycopolycations efficiently complex pDNA at N/P ratios <5, protecting the pDNA from degradation in a physiological milieu. M58A45 and M62A52B32 complexed with plasmid encoding for antigenic ovalbumin (pOVA) trigger the immune activation of cultured dendritic cells, which present the SIINFEKL antigenic peptide via specific major histocompatibility complex-I. Importantly, administration of M58A45/pOVA elicits SIINFEKL-specific T-cell response in C56BL/6 mice bearing the melanoma tumor model B16-OVA, well in line with a reduction in tumor growth. These results qualify mannosylation as an efficient strategy to target immune cells in cancer vaccination and emphasize the potential of these glycopolycations as effective delivery vehicles for nucleic acids.

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La enfermedad periodontal asociada mas frecuentemente a infección por VIH es el eritema gingival lineal, gingivitis ulcerativa necrozante y periodontitis ulcerativa necrozante. Los cambios que sufre el periodonto en presencia de VIH se sugiere que pueden ser indicativos de alteraciones sistémicas como infección por VIH. Los virus en la enfermedad periodontal, juegan un papel muy importante estando relacionados con el sistema inmune del huésped sobre todo en relación con patologías periodontales como eritema gingival lineal y periodontitis ulcerativa necrozante. Se encontró disminución de linfocitos T, macrófagos y alto porcentaje de neutrófilos e IgG en el plasma sanguíneo en eritema gingival lineal, existiendo cambios importantes en las células inflamatorias. Alto número de neutrófilos en el epitelio gingival se asocia con la severa necrosis gingival reportada en pacientes con SIDA El objetivo de este trabajo es establecer algunas alteraciones ultraestructurales en una patología periodontal como es el eritema gingival lineal en pacientes VIH. Material y Método Se tomaron biopsias de tejido periodontal con diagnostico de eritema gingival lineal en pacientes que acudieron al Centro de Atención a Pacientes con Enfermedades Infectocontagiosas "Dra. Elsa La Corte", adultos, masculinos. Pacientes VIH+, bajo terapia HAART. Biopsias procesadas por técnicas rutinarias para M.E.T Resultados: alteración de melanocitos presencia de queratinocitos y nucleoedema, mitocondrias electrondensas, escasos tonofilamentos y poco retículo endoplásmico rugoso y Golgi. Núcleo de contorno ligeramente irregular (espongiosis), pérdida de desmosomas, específicamente mácula adherens, membrana basal continua, con pequeñas áreas de discontinuidad (fenestras), pocas vesículas pinocíticas y algunas caveolas. Abundante colágeno, fibroblastos atípicos en forma de masa celular. Conclusión: las alteraciones ultraestructurales encontradas en eritema gingival lineal sugieren

Linear Gingival Erythema, Ulcerative Necrotizing Gingivitis and Periodontitis are the most frequent pathology associated to HIV. The alterations in periodontal tissue could indicate the presence of a systemic disease like HIV infection. The virus in periodontal disease have a closer relations with host human immune system, specifically in Linear Gingival Erythema and Ulcerative Necrotizing Periodontitis and Gingivitis. In the blood plasma of Linear Gingival Erythema it was found decrease of T lymphocyte, histiocytes and high percent of neutrophils and Ig G, and important changes in the inflammatory cell. High number of neutrophils in the gingival epithelial are associated with mostly severe gingival necrosis that reported in AIDS patient. Propose: evaluation of ultrastructural alterations in periodontal disease like lineal gingival erythema. Material and Methods: biopsies were taken from periodontal lesions with diagnostic of lineal gingival erythema, patients attending the Centre for the Care of Patients with Infections and Contagious diseases "Dra Elsa La Corte". The patients are males using HAART therapy. Biopsies were processed according to rutinary techniques for Transmission Electron Microscopy. Results: melanocytes alteration, and nucleoedema, different electron densities mitochondria, scarce tonofilaments, rough endoplasmic reticulum and Golgi apparatus. Irregular shape nucleus, loosed desmosome specifically macula adherens, spongyosis continuous basement membrane, with little areas of discontinue membrane, scarce pynocitc vesicles and caveolas, plentiful collagen, atipic fibroblast like cell mass. Conclusion: it suggested that ultrastructural alterations founded in lineal gingival erythema are irreversible changes similar to those described in autoimmune disease and cancer

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