In situ expression of mononuclear cell markers and interleukin-2 receptor in renal allograft biopsies of acute rejection and borderline cases

The correct diagnosis of renal allograft rejection may be difficult using only clinical and/or histopathological criteria. Immunological assays should be considered in order to evaluate the phenotype of inflammatory infiltrate in renal allograft biopsies. Immunohistochemical studies were performed to detect mononuclear cells, CD4 and CD8 T lymphocytes, B lymphocytes, macrophages, null cells, and positive cells for interleukin-2 receptors. A total of 41 allograft biopsies classified into three groups were studied: acute cellular rejection (28 biopsies/22 patients), borderline (7 biopsies/5 patients) and control (6 biopsies/6 patients). In the rejection group (RG), increased cellularity was found mainly at the tubulo-interstitial level. Expression of CD8 positive cells was higher in RG when compared to borderline (BG) and control (CG) groups, respectively (0.9 vs. 0.0 vs. 0.35 cells/mm2; p < 0.001). Expression of macrophages was not statistically significant among the three groups (RG = 0.6 vs. BG = 0.2 vs. CG = 0.0 cells/mm2; p < 0.02). In the BG, CD4 + cells predominated (BG = 0.2 vs. RG = 0.05 vs. CG = 0.0 cells/mm2; p < 0.05). Clinically these patients were treated as cases of acute rejection. The numbers and different types of infiltrating cells did not correlate with patient's clinical outcome. Copyright © Informa Healthcare.

Characterization of blood mononuclear phagocytes in Phrynops hilarii (Chelonia Chelidae)

The localization of peroxidase activity in different cell regions is used as a criterion for the classification of the stage of maturation of mammalian mononuclear phagocytes with a positive peroxidase reaction indicating the presence of monoblasts, promonocytes, monocytes and macrophages. In this study it was evaluated the peroxidase activity of blood mononuclear phagocytes of this turtle detected at different stages of differentiation. The present observations suggest that, in turtles, the differentiation of mononuclear phagocytes occur in the blood circulation, in contrast to animals, where only are monocytes in circulating blood and macrophage differentiation occurs in other body compartments. © 2007 Sociedad Chilena de Anatomía.

Cell Therapy with Bone Marrow Mononuclear Cells in Elastase-Induced Pulmonary Emphysema

Emphysema is characterized by destruction of alveolar walls with loss of gas exchange surface and consequent progressive dyspnea. This study aimed to evaluate the efficiency of cell therapy with bone marrow mononuclear cells (BMMC) in an animal model of elastase-induced pulmonary emphysema. Emphysema was induced in C57Bl/J6 female mice by intranasal instillation of elastase. After 21 days, the mice received bone marrow mononuclear cells from EGFP male mice with C57Bl/J6 background. The groups were assessed by comparison and statistically significant differences (p & 0. 05) were observed among the groups treated with BMMC and evaluated after 7, 14 and 21 days. Analysis of the mean linear intercept (Lm) values for the different groups allowed to observe that the group treated with BMMC and evaluated after 21 days showed the most significant result. The group that received no treatment showed a statistically significant difference when compared to other groups, except the group treated and evaluated after 21 days, evidencing the efficacy of cell therapy with BMMC in pulmonary emphysema. © 2012 Springer Science+Business Media New York.

Mononuclear inflammatory infiltrate and microcirculation injury in acute rejection: Role in renal allograft survival

This study aimed at investigating associations between monocytes/ macrophages (Mo) infiltration and three important criteria associated with acute antibody-mediated rejection: C4d staining, microcirculation injury, and graft survival time. By quantitative analysis, Mo were counted in peritubular capillaries and in the interstitial compartment (peritubular/interstitial Mo), and they were also identified in glomeruli (glomerular Mo). The study included 47 patients who received renal allograft between 1991 and 2009. Capillaritis and glomerulitis were classified by the Banff scoring system, and C4d and Mo were analyzed by immunohistochemistry. In the quantitative analysis, the mean values of 50 Mo per 10 high-power fields (HPF) and 4 Mo per glomerulus were used as cut-off points for the peritubular/interstitial and glomerular compartments, respectively. Positive C4d cases were associated with the groups of biopsies with a mean value ≥50 Mo per 10 HPF (p = 0.01) and ≥4 Mo per glomerulus (p = 0.02). The group with a mean value ≥4 Mo per glomerulus also showed association with the presence of glomerulitis (p = 0.02). Peritubular/ interstitial Mo did not associate with glomerulitis. Capillaritis did not show association with peritubular/interstitial or glomerular Mo. As regards graft survival, the infiltration of Mo in glomeruli interfered with allograft survival (p = 0.01). The group with a mean value of ≥4 glomerular Mo presented worse survival at the time of the 1-year follow-up. According to the literature, our data showed that infiltration of mononuclear cells was associated with C4d staining, microcirculation injury, and glomerulitis, in particular, and that glomerular macrophages could influence renal allograft survival. Copyright © 2013 Informa Healthcare USA, Inc.

Transmissão de produtos farmacêuticos tópicos através de energia ultra-sônica na regeneração de lesões da musculatura esquelética - enfoque morfológico

Pós-graduação em Ciências da Motricidade - IBRC

Efeitos do processo inflamatório sobre o sistema pigmentar extracutâneo em Eupemphix nattereri (Anura: Leiuperidae)

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Ultra-estrutura de células presentes no reparo tecidual sob atividade física moderada

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Estudo dos efeitos de extratos de glândulas salivares de fêmeas de Rhipicephalus sanguineus (Latreille, 1806) (Acari : Ixodidae) na resposta imunológica de hospedeiros pós inoculadores

Pós-graduação em Ciências Biológicas (Biologia Celular e Molecular) - IBRC

Avaliação do estado inflamatório em ilhotas de Langerhans de camundongos portadores do tumor sólido de Ehrlich

Pós-graduação em Biologia Geral e Aplicada - IBB

Obesidade sarcopênica: diagnóstico, prevalência e associações com aptidão física, resistência insulínica, estresse inflamatório e oxidativo

Pós-graduação em Patologia - FMB

Implicações do parasitismo por nematódeos do gênero Rhabdias(Nematoda, Rhabdiasidae) em Crotalus durissus terrificus (Serpentes, Viperidae): alterações pulmonares, microbiológicas e hematológicas

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Efeito de um inibidor de leucotrienos no processo inflamatório decorrente da infecção por Paracoccidioides brasiliensis em camundongos geneticamnte selecionados

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Avaliação do efeito antinociceptivo, anti-inflamatório e gastroprotetor do extrato hidroalcoolico das entrecascas de Machaerium hirtum (Vell) Stellfeld

Pós-graduação em Ciências Biológicas (Farmacologia) - IBB

Caracterização do efeito anti-inflamatório e anti-hemorrágico dos extratos e frações enriquecidas de espécies do projeto temático BIOTA/FAPESP

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Avaliação do retinol no escarro e no soro de tabagistas e pacientes com doença pulmonar obstrutiva crônica e sua relação com o processo inflamatório

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)