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Biomédica (Bogotá) ; 41(3): 449-457, jul.-set. 2021. tab, graf
Article in English | LILACS | ID: biblio-1345395


Abstract. Introduction: The thymus is active mainly during the neonatal and pre-adolescent periods. Objective: To test naïve thymocytes proliferation and monocytes stimulation. Materials and methods: We collected fresh thymus tissue from neonate mice after surgery. Suspension cells were coated onto Ficoll-Hypaque support. The obtained cells (thymocytes) were cultured measuring the proliferation of naïve T cells stimulated by Crotalus durissus cumanensis (Cdc) venom at sub-lethal doses (20 ng). Then, we supplemented the wells with AlamarBlue™ and incubated them for 5 h to test their proliferation. Mononuclear cells from mice peripheral blood were collected and layered onto the support of the Ficoll-Hypaque solution. We added the thymocytes actively dividing (25 x 105 cells) from cultures stimulated with Cdc venom at 20 ng/well to cultured monocytes freshly obtained from the Ficoll-Hypaque separation. Both cell populations were incubated for 36 h until monocytes matured to macrophages. Results: The naïve thymocytes rapidly proliferated after stimulation with the Cdc venom (NTCdc) and these successively induced the maturation and function of monocytes progenitor cells to mature macrophages, which ingested Chinese ink. Conclusions: The naïve thymocytes proliferated by stimulation with the Cdc venom and subsequently the NT/Cdc induced the rapid maturation and function of monocytes progenitor cells becoming mature macrophages with their phenotypic characteristics.

Resumen. Introducción. El timo es activo principalmente durante los períodos neonatal y preadolescente. Objetivo. Probar la proliferación de los timocitos tempranos y la estimulación de monocitos que producen. Materiales y métodos. Se recogió tejido de timo fresco después de la cirugía de ratones recién nacidos. La suspensión de células se colocó sobre un soporte de Ficoll-Hypaque. Las células obtenidas (timocitos) se cultivaron y se midió la proliferación de células T vírgenes estimuladas por el veneno de Crotalus durissus cumanensis (Cdc) en dosis subletales (20 ng). A continuación, se agregó AlamarBlue™ a los pocillos y se incubaron durante 5 horas para evaluar la proliferación. Se recogieron células mononucleares de sangre periférica de ratones y se colocaron sobre un soporte de solución de Ficoll-Hypaque. Los timocitos que se dividieron activamente (25 x 105 células) a partir de los cultivos estimulados con veneno de Cdc (20 ng/pocillo) y se agregaron a los cultivos de monocitos recién obtenidos de la separación en la solución de Ficoll-Hypaque. Ambas poblaciones celulares se incubaron durante 36 horas hasta que los monocitos maduraron a macrófagos. Resultados Los timocitos tempranos experimentaron una rápida proliferación estimulada por el veneno de Cdc (NTCdc) y, posteriormente, indujeron la maduración y la función de las células progenitoras de monocitos, los cuales maduraron a macrófagos, que se tiñeron con tinta china. Conclusiones. Los timocitos tempranos proliferaron con la estimulación del veneno de Cdc y, posteriormente, el NT/Cdc indujo la maduración rápida y la función de las células progenitoras de monocitos, transformándose en macrófagos con sus características fenotípicas.

Crotalus , Thymocytes , Monocytes , Crotalid Venoms , Macrophages
Braz. j. med. biol. res ; 54(7): e10603, 2021. tab, graf
Article in English | LILACS | ID: biblio-1249320


Neonatal sepsis is an inflammatory system syndrome and a main cause of neonatal mortality. However, there is a lack of ideal biomarkers for early neonatal sepsis diagnosis. The aim of this study was to evaluate the clinical significance of miR-141 in sepsis in neonates, and explore the regulatory effects of miR-141 on inflammation in monocytes. This study used qRT-PCR to calculate the expression of miR-141 in the serum of septic neonates. The diagnostic values of procalcitonin (PCT) and serum miR-141 were evaluated by receiver operating characteristic (ROC) curves. The relationship between miR-141 and TLR4 was determined using luciferase reporter assay. An inflammation model was established using monocytes with lipopolysaccharide (LPS) treatment. ELISA assay was used to analyze the levels of pro-inflammatory cytokines. The expression of miR-141 in neonatal sepsis was significantly lower than healthy controls. ROC curves showed that miR-141 had diagnostic accuracy. LPS stimulation in monocytes led to a decrease in the expression of miR-141. A luciferase reporter assay proved that miR-141 targeted TLR4, and a negative correlation of miR-141 with TLR4 was found in septic neonates. ELISA results demonstrated that the overexpression of miR-141 inhibited LPS-induced inflammation in monocytes. In conclusion, serum decreased miR-141 expression served as a candidate diagnostic biomarker of neonatal sepsis. TLR4 is a target gene of miR-141, which may mediate the inhibitory effects of miR-141 overexpression on LPS-induced inflammation in monocytes. Therefore, miR-141 is expected to be a potential diagnostic biomarker and a therapeutic target in neonatal sepsis.

Humans , Infant, Newborn , Sepsis , MicroRNAs , Neonatal Sepsis , Monocytes , Lipopolysaccharides , Toll-Like Receptor 4
Article in English | WPRIM | ID: wpr-880669


OBJECTIVES@#To investigate the level and significance of serum γ-glutamyl transferase-to-platelet ratio (GPR) and monocyte count to high-density lipoprotein ratio (MHR) in patients with essential hypertension (EH) and unstable angina (UA).@*METHODS@#A total of 218 patients with coronary angiography aged ≥60 years, who were admitted to the EH hospital of the Department of Cardiac Medicine, Affiliated Hospital of Chengde Medical College, were selected from September 2018 to September 2019. They were divided into an EH+UA group (@*RESULTS@#Compared with the control group, patients in the EH+UA group and the EH group had higher body mass index (BMI), tyiglyceride (TG), GPR, and MHR, and lower high-density lipoprotein-cholesterol (HDL-C) (all @*CONCLUSIONS@#There is a correlation between GPR, MHR and EH combined with UA pectoris, and the combined detection of the two indicators has adjuvant diagnostic value for elderly EH combined with UA.

Aged , Angina, Unstable , Cholesterol, HDL , Coronary Angiography , Essential Hypertension , Humans , Lipoproteins, HDL , Monocytes
Article in English | WPRIM | ID: wpr-880662


Chronic myeloid leukemia with a significant increase of monocytes is rare and difficult to identify from chronic myelo-monocytic leukemia in clinic. A 31-year-old male patient with systemic pain was initially diagnosed as chronic myelo-monocytic leukemia, who was finally diagnosed as chronic myeloid leukemia by fusion gene and chromosome examination. In addition to the typical Ph chromosome, a rare chromosome translocation t(2; 7)(p13; p22) was observed. The detection of monocyte subsets by multi-parameter flow cytometry is a diagnostic marker to distinguish the above 2 diseases. The relationship between fusion genes and mononucleosis is not clear. Tyrosine kinase inhibitors or allogeneic hematopoietic stem cell transplantation can be used in the treatment for this disease.

Adult , Humans , Karyotype , Karyotyping , Leukemia, Myelogenous, Chronic, BCR-ABL Positive/genetics , Male , Monocytes , Translocation, Genetic
Article in Chinese | WPRIM | ID: wpr-880042


OBJECTIVE@#To investigate the effect of neutrophil/lymphocyte ratio (NLR) and monocyte/lymphocyte ratio (MLR) in the valuation prognosis of patients with multiple myeloma (MM).@*METHODS@#The clinical data of 82 patients with initially diagnosed MM admitted to Gansu Provincial People's Hospital was analyzed retrospectively. NLR and MLR were calculated based on blood routine results respectively. The optimal cut-off point of NLR and MLR was determined according to the ROC curve, and the patients were divided into the high NLR/MLR group and the low NLR/MLR group. The general data, biochemical indicators and prognosis of the patients in each groups were compared respectively. The prognostic significance of the high NLR/MLR group and the low NLR/MLR group in patients between different treatment regimens and different clinical characteristics were analyzed. Risk stratification was designed based on NLR and high MLR as two risk factors, and the effect of risk factors, on the prognosis of MM patients were compared.@*RESULTS@#ROC curve analysis determined that the optimal cut-off point of NLR was 3.1 (sensitivity 75%, specificity 70.7%) and the optimal cut-off point of MLR was 0.34 (sensitivity 83.3%, specificity 53.4%). The lactate dehydrogenase (LDH) and mean platelet volume (MPV) were correlated to NLR and MLR (P<0.05). There were no significant difference in age, sex, serum calcium (Ca), β @*CONCLUSION@#Elevated NLR and MLR are associated with poor prognosis in MM patients and may serve as the cost-effective and readily available prognostic biomarkers.

Blood Platelets , Humans , Lymphocytes , Monocytes , Multiple Myeloma , Neutrophils , Prognosis , Retrospective Studies
Article in Chinese | WPRIM | ID: wpr-880037


OBJECTIVE@#To explore the relationship between Treg cells level in peripheral blood and prognosis of patients with diffuse large B-cell lymphoma (DLBCL).@*METHODS@#The percentage and absolute value of Treg cells in peripheral blood of DLBCL patients were detected by flow lytometry, and their correlation to prognosis was analyzed by survival analysis. The absolute count of Treg cells was detected by using maximally selected Log-rank statistic, and it was used as cutoff point to distinguish difference survival. The new group of Treg based on cutoff point was combined with age, sex, pathological subtype, risk stratification, treatment plan, and other indicators to include in the single factor survival analysis of Kaplan-Meier. Finally, the COX proportional risk model was used to verify the effect of the above indicators on progression-free survival.@*RESULTS@#The absolute count of Treg cells in DLBCL patients was significantly lower in the disease progressed group than those in the remission group. The cutoff point of absolute value of the Treg cell was 19 cells /μl. The absolute count of Treg cells was an independent prognostic factor of the risk stratification.@*CONCLUSION@#At the beginning of diagnosis, the reduction of the absolute count of Treg cells in peripheral blood of DLBCL patients show a poor prognosis.

Humans , Lymphoma, Large B-Cell, Diffuse , Monocytes , Prognosis , Proportional Hazards Models , Retrospective Studies , T-Lymphocytes, Regulatory
Chinese Medical Journal ; (24): 1310-1316, 2021.
Article in English | WPRIM | ID: wpr-878104


BACKGROUND@#Epigenetics, especially DNA methylation, plays an important role in the pathogenesis of primary Sjogren syndrome (pSS). Our study aimed to reveal the role of DNA methylation in peripheral monocytes of pSS patients.@*METHODS@#A total of 11 pSS patients and five age-matched healthy controls (HCs) were included in this study. Monocytes were isolated from peripheral blood mononuclear cells using magnetic microbeads. DNA methylation profiles were generated using Human Methylation 850K BeadChips.@*RESULTS@#In monocytes from pSS patients, we identified 2819 differentially methylated positions (DMPs), comprising 1977 hypomethylated- and 842 hypermethylated-DMPs, corresponding to 1313 unique genes when compared with HCs. IFI44L, MX1, PAARP9, and IFITM1, which influence the interferon (IFN) signaling pathway, were among the genes hypomethylated in pSS. Functional analysis of genes with a minimum of two DMPs showed involvement in antigen binding, transcriptional regulation, cell adhesion, IFN-γ pathway, type I IFN pathway, antigen presentation, Epstein-Barr virus infection, human T-lymphotropic virus type 1 virus infection, and metabolic disease-related pathways. In addition, patients with higher serum IgG levels exhibited enrichment in Notch signaling and metabolic-related pathways. Upon comparing monocytes with salivary gland epithelial cells, an important overlap was observed in the cell cycle, cell senescence, and interleukin-17 signaling pathways. The differentially methylated genes were more enriched in the ribosome- and AMP-activated protein kinase signaling pathway in anti-Ro/SSA and anti-La/SSB autoantibodies double-positive patients.@*CONCLUSION@#Genome-wide DNA methylation profiling revealed significant differences in DNA methylation in monocytes isolated from patients with pSS.

DNA Methylation/genetics , Epstein-Barr Virus Infections , Herpesvirus 4, Human , Humans , Leukocytes, Mononuclear , Monocytes , Sjogren's Syndrome/genetics
Rev. Assoc. Med. Bras. (1992) ; 66(8): 1043-1048, Aug. 2020. tab, graf
Article in English | LILACS, SES-SP | ID: biblio-1136336


SUMMARY OBJECTIVE Monocyte count to HDL-C Ratio (MHR) and Fibrinogen to Albumin Ratio (FAR) have recently emerged as markers of inflammation in atherosclerotic diseases. Our goal was to investigate the relationships of MHR and FAR with the severity of carotid artery stenosis (CAS) in patients with asymptomatic carotid artery disease. METHODS This retrospective study consisted of 300 patients with asymptomatic CAS. Pre-angiographic MHR, FAR, and high-sensitive C-reactive protein (hsCRP) were measured. Carotid angiography was performed in patients with ≥50% stenosis on carotid ultrasonography. Patients were first split into 2 groups based on the degree of CAS and then tertiles (T) of MHR. RESULTS 96 patients had clinically insignificant CAS (<50%) (Group-1), and 204 patients had clinically significant CAS (≥50%) (Group-2). Group-2 had higher MHR, FAR, and hsCRP than group-1. Patients in T3 had higher MHR, FAR, and hsCRP than in T1 and T2. MHR, FAR, and hsCRP were correlated with each other (p<0.001, for all). MHR, FAR, and hsCRP were independent predictors of significant CAS. MHR better predicted a significant CAS than FAR and hsCRP (p<0.05). CONCLUSION Pre-angiographic MHR may be a better predictor than FAR and hsCRP in identifying a clinically significant carotid stenosis in patients with asymptomatic CAS. Patients with asymptomatic CAS and a high level of MHR should be followed-up closely to supervise risk-factor control and intensify treatment.

RESUMO OBJETIVO Recentemente, a contagem de monócitos para a proporção HDL-C (MHR) e a relação fibrinogênio para albumina (FAR) emergiram como marcadores de inflamação em doenças ateroscleróticas. Nosso objetivo é investigar a relação da MHR e FAR com a gravidade da estenose da artéria carótida (CAS) em pacientes com doença assintomática da artéria carótida. MÉTODOS Este estudo retrospectivo incluiu 300 pacientes com CAS assintomática. MHR pré-angiográfica, FAR e proteína C reativa de alta sensibilidade (hsCRP) foram medidas. A angiografia carotídea foi realizada em pacientes com estenose ≥50% na ultrassonografia carotídea. Os pacientes foram primeiramente divididos em dois grupos com base no grau de CAS e depois nos tercis (T) da MHR. RESULTADOS Noventa e seis pacientes apresentaram um CAS clinicamente insignificante (<50%) (grupo 1) e 204 pacientes apresentaram CAS clinicamente significativo (≥50%) (grupo 2). O grupo 2 apresentou MHR, FAR e hsCRP superior ao grupo 1. Pacientes em T3 apresentaram maior MHR, FAR e hsCRP do que em T1 e T2. MHR, FAR e hsCRP foram correlacionados entre si (p<0,001, para todos). MHR, FAR e hsCRP foram preditores independentes de CAS significativa. MHR predisse melhor uma CAS significativa que FAR e hsCRP (p<0,05). CONCLUSÕES A MHR pré-angiográfica pode ser um melhor preditor que a FAR e a hsCRP na identificação de estenose carotídea clinicamente significativa em pacientes com CAS assintomática. Pacientes com CAS assintomática e alto nível de MHR devem ser acompanhados de perto para supervisionar o controle dos fatores de risco e intensificar o tratamento.

Humans , Carotid Artery Diseases , C-Reactive Protein , Monocytes , Retrospective Studies
Rev. Assoc. Med. Bras. (1992) ; 66(8): 1077-1081, Aug. 2020. tab, graf
Article in English | LILACS, SES-SP | ID: biblio-1136333


SUMMARY OBJECTIVE Cellulite infection is a non-necrotizing inflammation of the skin and subcutaneous tissue and is one of the most common reasons for admission to hospital. This retrospective study aimed to investigate the Neutrophil to Lymphocyte Ratio (NLR), Platelet to Lymphocyte Ratio (PLR), and Lymphocyte to Monocyte Ratio (LMR) in patients with cellulitis. METHODS In our study, we retrospectively analyzed 96 patients with cellulitis and 98 age- and sex-matched healthy controls. The study and control groups were compared regarding NLR, PLR, and LMR.0.001). When patients with cellulitis were divided into two groups, i.e., ≥65 years and <65 years, a statistically significant difference was noted in the NLR and LMR values (p < 0.05). In the ROC curve analysis, NLR had the highest discriminative power in distinguishing between cellulitis and healthy controls (AUC = 0.950, 95% CI: 0.920-0.979, p < 0.001; 91.6% sensitivity and 89.8% specificity). CONCLUSION NLR was significantly higher in differentiating cellulite and in patients older than 65 years. Larger, prospective studies are required to determine its usefulness in assessing differential diagnosis and prognosis in cellulitis patients.

RESUMO OBJETIVO A celulite infecciosa é uma inflamação não necrotizante da pele e do tecido subcutâneo e uma das causas mais comuns para internação. O objetivo deste estudo retrospectivo foi investigar as relações Neutrófilo/Linfócito (RNL), Plaqueta/Linfócito (RPL) e Linfócito/Monócito (RLM) em pacientes com celulite. MÉTODOS Nós analisamos, retrospectivamente, 96 pacientes com celulite e 98 controles saudáveis equivalentes em sexo e idade. Os grupos foram comparados quanto a RNL, RPL e RLM. RESULTADOS Os valores de RPL e RNL do grupo com celulite foram significativamente mais elevados do que os do grupo de controle (p < 0,001). Após dividir os pacientes com celulite em dois grupos, ≥65 anos e <65 anos, uma diferença estatisticamente significativa foi observada nos valores de RNL e RLM (p < 0,05). Na análise da curva ROC, a RNL apresentou o maior poder de discriminação para distinguir entre pacientes com celulite e controles saudáveis (AUC = 0,950, 95% CI: 0,920 - 0,979; p < 0,001; 91,6% de sensibilidade e 89,8% de especificidade). CONCLUSÃO O valor de RNL foi significativamente maior para a diferenciação de pacientes com celulite e pacientes com mais de 65 anos. Estudos prospectivos maiores são necessários para determinar a sua utilidade na avaliação de diagnósticos diferenciais e prognósticos em pacientes com celulite.

Humans , Lymphocytes , Monocytes , Cellulitis , Neutrophils , Prognosis , Prospective Studies , Retrospective Studies
Asia Pacific Allergy ; (4): 2-2020.
Article in English | WPRIM | ID: wpr-785463


Drug reaction with eosinophilia and systemic symptoms (DRESS) syndrome is a severe cutaneous adverse reaction involving various internal organs. Flare-ups after recovery from the initial presentation of DRESS are caused by relapse of drug-induced T-cell-mediated reactions. However, the specific underlying mechanism is unclear. Here, we report a case of a 60-year-old man with allopurinol-induced DRESS who suffered recurrent episodes of generalized rash with eosinophilia, which mimicked immune reconstitution inflammatory syndrome. Analysis of immunological profiles revealed that the percentages of T lymphocytes and regulatory T cells in the patient with DRESS were higher than those in healthy controls. In addition, there was a notable change in the subtype of monocytes in the patient with DRESS; the percentage of nonclassical monocytes increased, whereas that of classical monocytes decreased. Upon viral infection, nonclassical monocytes exhibited strong pro-inflammatory properties that skewed the immune response toward a Th2 profile, which was associated with persistent flare-ups of DRESS. Taken together, the results increase our understanding of the pathogenesis of DRESS as they suggest that expansion of nonclassical monocytes and Th2 cells drives disease pathogenesis.

Allopurinol , Drug Hypersensitivity Syndrome , Eosinophilia , Exanthema , Herpesviridae , Humans , Immune Reconstitution Inflammatory Syndrome , Middle Aged , Monocytes , Recurrence , T-Lymphocytes , T-Lymphocytes, Regulatory , Th2 Cells
Mem. Inst. Oswaldo Cruz ; 115: e190408, 2020. graf
Article in English | LILACS | ID: biblio-1101276


BACKGROUND The mechanism of resistance to SbIII in Leishmania is complex, multifactorial and involves not only biochemical mechanisms, but also other elements, such as the immune system of the host. OBJECTIVES In this study, putative changes in the immunological profile of human monocytes infected with wild-type (WT) and antimony (SbIII)-resistant Leishmania (Viannia) braziliensis and Leishmania (Leishmania) infantum lines were evaluated. METHODS Susceptibility assays WT and SbIII-resistant L. braziliensis and L. infantum were performed using lines THP-1 human monocytic lineage. Phagocytic capacity, cytokine profile, intracellular nitric oxide (NO) production and surface carbohydrate residues profile were performed in peripheral blood monocytes by flow cytometry. FINDINGS The phagocytic capacity and intracellular NO production by classical (CD14++CD16-) and proinflammatory (CD14++CD16+) monocytes were higher in the presence of L. infantum lines compared to L. braziliensis lines. The results also highlight proinflammatory monocytes as the cellular subpopulation of major relevance in a phagocytosis event and NO expression. It is important to note that L. infantum induced a proinflammatory cytokine profile characterised by higher levels of TNF-α in culture supernatant than L. braziliensis. Conversely, both Leishmania lines induce high levels of IL-6 in culture supernatant. Analysis of the expression profile of surface carbohydrates showed that L. braziliensis presents 4.3-fold higher expression of galactose(β1,4)N-acetylglucosamine than L. infantum line. Interestingly, the expression level of α-N-acetylgalactosamine residues was 2-fold lower in the SbIII-resistant L. braziliensis line than its counterpart WT line, indicating differences in surface glycoconjugates between these lines. MAIN CONCLUSIONS Our results showed that L. braziliensis and L. infantum induce different innate immune responses and a highly inflammatory profile, which is characteristic of infection by L. infantum, the species associated with visceral disease.

Humans , Male , Female , Adult , Young Adult , Phagocytosis/immunology , Leishmania braziliensis/immunology , Monocytes/parasitology , Leishmania infantum/immunology , Antimony/pharmacology , Nitric Oxide/biosynthesis , Antiprotozoal Agents/pharmacology , Leishmania braziliensis/drug effects , Drug Resistance , Monocytes/immunology , Leishmania infantum/drug effects , Flow Cytometry , Immunity, Innate
Einstein (Säo Paulo) ; 18: eAO4966, 2020. tab, graf
Article in English | LILACS | ID: biblio-1056043


ABSTRACT Objective To validate multilineage score system correlating results of flow cytometry, cytogenetics, cytomorphology and histology from samples of patients with suspected myelodysplastic syndrome or cytopenia of unknown origin. Methods A retrospective study analyzing laboratory data of 49 patients with suspected myelodysplastic syndrome or cytopenia of unknown origin, carried out between May and September 2017. The inclusion criteria were availability of flow cytometry results, and at least one more method, such as morphology, histology or cytogenetics. Thirty-eight patients were classified as diagnosis of myelodysplastic syndromes, whereas 11 were classified as normal. Patients were evaluated based on score systems, Ogata score and flow cytometry multilineage score. Results Comparing the scores obtained in the Ogata score and the multilineage score, it was observed that in four cases the Ogata score was zero or 1 point, while the multilineage score was higher than 3 points. In addition, in 12 cases with Ogata score of 2, the multilineage score was greater than 3. Conclusion The flow cytometry multilineage score system demonstrated to be more effective in dysplasia analysis, by assessing the erythroid, monocytic, granulocytic and precursor cell lineages, apart from the parameters evaluated by the Ogata score.

RESUMO Objetivo Validar ficha de escore multilinhagem correlacionando resultados obtidos de citometria de fluxo, citogenética, citomorfologia e histologia de amostras de pacientes com suspeita de síndrome mielodisplásica ou citopenias a esclarecer. Métodos Estudo retrospectivo de análise de dados laboratoriais de 49 pacientes com suspeita clínica de síndrome mielodisplásica ou citopenias a esclarecer realizado entre maio e setembro de 2017. Os critérios de inclusão foram a disponibilidade de resultados de citometria de fluxo e de, pelo menos, outra metodologia, entre morfologia, histologia, ou citogenética. Trinta e oito pacientes foram classificados como diagnosticados com síndromes mielodisplásicas enquanto 11 foram classificados como normais. Os pacientes foram avaliados utilizando sistemas de escore, escore de Ogata e ficha multilinhagem. Resultados Comparando as pontuações obtidas no escore de Ogata e na ficha multilinhagem, observou-se que, em quatro casos, o score de Ogata foi zero ou 1 ponto, enquanto, pela ficha multilinhagem, a pontuação foi superior a 3 pontos. Além disso, em 12 casos com escore de Ogata 2, a pontuação pela ficha multilinhagem foi superior a 3. Conclusão A ficha multilinhagem demonstrou ser mais eficaz na análise de displasia por avaliar as linhagens eritroide, monocítica, granulocítica e células precursoras, além dos parâmetros avaliados no escore de Ogata.

Humans , Male , Female , Infant , Child, Preschool , Child , Adolescent , Adult , Aged , Aged, 80 and over , Young Adult , Myelodysplastic Syndromes/pathology , Flow Cytometry/standards , Reference Standards , Biopsy , Bone Marrow Cells/pathology , Monocytes/pathology , Reproducibility of Results , Retrospective Studies , Cytogenetic Analysis/methods , Cytogenetic Analysis/standards , Erythroid Cells/pathology , Flow Cytometry/methods , Granulocytes/pathology , Middle Aged
Article in Chinese | WPRIM | ID: wpr-878793


The aim of this paper was to investigate the immunosuppressive effects of dihydroartemisinin and Huobahua compatibility in mice with delayed hypersensitivity and explore its possible mechanism. The delayed-type hypersensitivity(DTH) model in mice was established to observe the immunosuppressive effects of dihydroartemisinin and Huobahua compatibility in DTH mice. ELISA assay was used to detect the contents of interferon(IFN-γ); histopathological changes and degree of mononuclear infiltration of right ear tissues were examined by HE staining; the expression level of intercellular cell adhesion molecule-1(ICAM-1) in the right ear of mice was detected by immunohistochemistry; the protein expression levels of p38 phospho mitogen activated protein kinase(p-p38 MAPK) was detected by Western blot analysis. As compared with the control group, the degree of ear swelling, thymus/spleen index, serum IFN-γ as well as the number and degree of infiltration of monocytes were significantly increased in the model group. As compared with the model group, the degree of ear swelling and thymus/spleen index of the mice in the combination group were significantly reduced; the number and degree of infiltration of monocytes were significantly relieved; the serum levels of IFN-γ and the expression levels of p-p38 MAPK and ICAM-1 proteins in the right ear were also significantly reduced. The combination of dihydroartemisinin and Huobahua can significantly inhibit the DTH response, and it may regulate the production and secretion of related inflammatory factor IFN-γ by inhibiting the phosphorylation activity of p38 MAPK, thereby further reducing the expression of ICAM-1 and thus exerting the immunosuppressive effect.

Animals , Artemisinins , Intercellular Adhesion Molecule-1/genetics , Mice , Monocytes , p38 Mitogen-Activated Protein Kinases/genetics
Article in English | WPRIM | ID: wpr-828977


Objective@#To investigate the relationship between human cytomegalovirus (HCMV) infection and peripheral blood CD14 CD16 monocytes in the pathogenesis of coronary heart disease (CHD), and to elucidate the mechanism of pathogenesis in CHD by analyzing the correlation between infection, inflammation, and CHD, to provide a basis for the prevention, evaluation, and treatment of the disease.@*Methods@#In total, 192 patients with CHD were divided into three groups: latent CHD, angina pectoris, and myocardial infarction. HCMV-IgM and -IgG antibodies were assessed using ELISA; CD14 CD16 monocytes were counted using a five-type automated hematology analyzer; mononuclear cells were assessed using fluorescence-activated cell sorting; and an automatic biochemical analyzer was used to measure the levels of triglyceride, cholesterol, high- and low-density lipoprotein cholesterols, lipoprotein, hs-CRp and Hcy.@*Results@#The positive rates of HCMV-IgM and -IgG were significantly higher in the CHD groups than in the control group. HCMV infection affects lipid metabolism to promote immune and inflammatory responses.@*Conclusion@#HCMV infection has a specific correlation with the occurrence and development of CHD. The expression of CD14 CD16 mononuclear cells in the CHD group was increased accordingly and correlated with acute HCMV infection. Thus, HCMV antibody as well as peripheral blood CD14 CD16 mononuclear cells can be used to monitor the occurrence and development of CHD.

Angina Pectoris , Epidemiology , Virology , China , Epidemiology , Coronary Disease , Epidemiology , Virology , Cytomegalovirus , Physiology , Cytomegalovirus Infections , Humans , Incidence , Inflammation , Epidemiology , Leukocyte Count , Monocytes , Metabolism , Myocardial Infarction , Epidemiology , Virology
Rev. méd. Chile ; 147(12): 1553-1560, dic. 2019. tab, graf
Article in English | LILACS | ID: biblio-1094189


ABSTRACT Background Prognosis of patients with Diffuse Large B Cell Lymphoma (DLBCL) is highly variable, and despite the use of modern immunochemotherapy regimens, almost 50% of patients will eventually relapse. Standard risk models, like the International Prognostic Index or the Revised International Prognostic Index (R_IPI) incorporate patient and tumor characteristics but do not consider variables related to host adaptive immunity which have been shown to be of significant prognostic value in non-Hodgkin lymphomas. Aim To analyze the prognostic significance of the absolute monocyte count at diagnosis in diffuse large-B-cell lymphoma in a retrospective setting. Material and Methods We reviewed data of 171 patients with DLBCL treated with Rituximab-based immunochemotherapy at two reference public Hospitals in Montevideo-Uruguay. The outcome measures were overall and relapse free survival. Results The absolute monocyte count, analyzed as a dichotomized variable predicted progression-free and overall survival in low risk patients according to the R-IPI score. Worse outcomes were observed in those with high monocyte count al diagnosis. Conclusions Absolute monocyte count could help in the identification of high-risk patients otherwise expected to have a good prognosis according to traditional scores.

Antecedentes El pronóstico de pacientes con Linfoma Difuso de Células B Grandes (DLBCL) es muy variable y el 50% de los pacientes recae a pesar de uso de regímenes actualizados de inmuno-quimioterapia. Los modelos pronósticos clásicos como el International Prognostic Index o el Revised International Prognostic Index (R_IPI) incorporan características del paciente o del tumor pero no incorporan variables asociadas a la inmunidad adaptativa que tienen valor en linfomas no Hodgkin. Objetivo Analizar retrospectivamente el valor pronóstico del recuento absoluto de monocitos al momento del diagnóstico en pacientes con DLBCL. Material y Métodos Se revisó información de 171 pacientes con DLBCL tratados con inmuno-quimioterapia basada en rituximab en dos centros de referencia públicos de Montevideo, Uruguay. Las variables de resultado fueron la sobrevida global y libre de recaída. Resultados El recuento absoluto de monocitos, tratado como una variable dicotómica, predijo la sobrevida libre de recaída en pacientes de bajo riesgo, de acuerdo al puntaje R-IPI. El pronóstico fue peor en pacientes con altos recuentos al momento del diagnóstico. Conclusiones El recuento absoluto de monocitos puede identificar pacientes de alto riesgo, clasificados como de bajo riesgo por los puntajes tradicionales.

Humans , Male , Female , Adolescent , Adult , Middle Aged , Aged , Aged, 80 and over , Young Adult , Monocytes , Lymphoma, Large B-Cell, Diffuse/blood , Leukocyte Count , Prognosis , Antineoplastic Combined Chemotherapy Protocols , Retrospective Studies , Lymphoma, Large B-Cell, Diffuse/drug therapy , Immunotherapy
Arch. Clin. Psychiatry (Impr.) ; 46(5): 137-140, Sept.-Oct. 2019. tab, graf
Article in English | LILACS | ID: biblio-1054909


Abstract Background Inflammation is involved in the pathophysiology of depression, and circulating inflammatory cytokines have been associated with depressive symptoms. However, measuring circulating cytokines have inherent methodological limitations. In vitro lipopolysaccharide (LPS)-stimulated intracellular cytokines (ICCs) overcome these limitations. Furthermore, because psychosocial and physiological stressors activate inflammatory responses and LPS-stimulated ICCs reflect the inflammatory responsivity of monocytes to such stressors, ICCs may reflect individual stress responsivity. Methods This cross-sectional study examined whether LPS-stimulated expression of ICCs in peripheral blood mononuclear cells (PBMCs) is a sensitive inflammation measure correlated with depressive symptoms in 180 community-dwelling older adults. We tested correlations of not only intracellular but also circulating inflammatory markers with depressive symptoms assessed using the 10-item Center for Epidemiological Studies Depression Scale (CES-D). Intracellular markers included expression of interleukin-6 (IL-6), tumor necrosis factor-α (TNF-α), and both in PBMCs. Circulating markers included IL-6, TNF-α, and C-reactive protein (CRP) in plasma. Results None of the correlations were statistically significant. However, in contrast to circulating markers, the correlations of ICCs were consistently in the expected direction, i.e., higher ICC expression correlating with higher depression severity. Discussion Despite the non-significant findings, further research is required for the evaluation of LPS-stimulated ICC expression as biomarkers of depressive symptoms.

Humans , Male , Female , Middle Aged , Aged , Aged, 80 and over , Lipopolysaccharides , Cytokines/blood , Depression/physiopathology , Inflammation/physiopathology , Psychiatric Status Rating Scales , In Vitro Techniques , C-Reactive Protein , Monocytes/metabolism , Biomarkers/blood , Cross-Sectional Studies , Interleukin-6/blood , Tumor Necrosis Factor-alpha/blood , Depression/blood , Inflammation/blood
Iatreia ; 32(3): 204-216, Jul-Set. 2019. tab, graf
Article in Spanish | LILACS | ID: biblio-1040000


RESUMEN El dengue es una infección viral aguda transmitida por la picadura de mosquitos del género Aedes, la cual produce hasta 100 millones de infecciones anuales en el mundo. Una gran proporción de individuos infectados con el virus presentan infecciones asintomáticas. Sin embargo, de los individuos que desarrollan la enfermedad, el 95 % presentan signos y síntomas similares a una virosis común, que por lo general se autoresuelven (dengue con y sin signos de alarma). El 5 % restante puede evolucionar a manifestaciones graves, caracterizadas por hemorragias, daño orgánico, choque hipovolémico e incluso la muerte (dengue grave). Los monocitos son uno de los blancos principales de la infección producida por el virus del dengue (DENV), los cuales participan en la replicación del mismo y en la producción de una gran variedad de citoquinas que contribuyen con el daño de diferentes tejidos y órganos en respuesta a la infección. Los monocitos se dividen en tres subpoblaciones: clásica (CD14++CD16-), no clásica (CD14+CD16++) e intermedia (CD14++CD16+), las cuales poseen respuestas funcionales contrastantes en diferentes procesos inflamatorios, en cuanto a la producción de mediadores solubles e interacción con el endotelio. Los monocitos no clásicos parecen ser los principales productores de mediadores inflamatorios como el TNF-α y la IL-1β en respuesta a la infección por DENV. Por lo tanto, se propone que cada subpoblación de monocitos debe tener un papel diferencial en la inmunopatología de la enfermedad. En esta revisión se recopilan los principales aspectos de la replicación viral y la inmunopatología del dengue, así como los principales hallazgos referentes al papel de los monocitos en esta infección y además, se propone un papel potencial y diferencial de las subpoblaciones de monocitos.

SUMMARY Dengue is an acute viral infection transmitted by the bite of the mosquito belonging to the genus Aedes, which produce until 100 millions of infections worldwide per year. A high proportion of infected individuals develop an asyntomatic infection. Nevertheless, among patients that develop a clinical disease, 95 % of them show clinical signs and symptoms similar to common virosis, that in the most of the cases can recover by themselves (dengue with and without alarm signs); the remaining 5 % can evolve to severe manifestations, characterized for hemorrhages, organic damage, hypovolemic shock and death (severe dengue). Monocytes are one of the main targets of the infection by dengue virus (DENV), supporting the viral replication, contributing to the production of high levels of cytokine and the damage of different tissues and organs in response to the infection. Monocytes are divided in 3 subsets: classical (CD14++CD16-), non-classical (CD14+CD16++) and intermediate (CD14++CD16+); which have differential functional responses in the inflammatory process, regarding the production of inflammatory mediators and the interaction with the endothelium. The non-classic monocytes seem to be the main producers of inflammatory mediators such as TNF-α and IL-1β in response to DENV infection. Therefore, it is proposed that each monocyte subset may have a different role in the disease immunopathology. This review collect the main evidence regarding the viral replication and the immunopathology of dengue, also it shows the most important findings about the role of monocytes in this infection and proposes a potential differential involvement of monocytes subsets.

Humans , Dengue , Monocytes
Arq. bras. cardiol ; 112(1): 12-17, Jan. 2019. tab, graf
Article in English | LILACS | ID: biblio-973841


Abstract Background: Assessing the monocyte to high-density lipoprotein ratio (MHR) is a new tool for predicting inflamation, which plays a major role in atherosclerosis. Myocardial bridge (MB) is thought to be a benign condition with development of atherosclerosis, particularly at the proximal segment of the brigde. Objective: To evaluate the relationhip between MHR and the presence of MB. Methods: We consecutively scanned patients referred for coronary angiography between January 2013- December 2016, and a total of 160 patients who had a MB and normal coronary artery were enrolled in the study. The patients' angiographic, demographic and clinic characteristics of the patients were reviewed from medical records. Monocytes and HDL-cholesterols were measured via complete blood count. MHR was calculated as the ratio of the absolute monocyte count to the HDL-cholesterol value. MHR values were divided into three tertiles as follows: lower (8.25 ± 1.61), moderate (13.11 ± 1.46), and higher (21.21 ± 4.30) tertile. A p-value of < 0.05 was considered significant. Results: MHR was significantly higher in the MB group compared to the control group with normal coronary arteries. We found the frequency of MB (p = 0.002) to increase as the MHR tertiles rose. The Monocyte-HDL ratio with a cut-point of 13.35 had 59% sensitivity and 65.0% specificity (ROC area under curve: 0.687, 95% CI: 0.606-0.769, p < 0.001) in accurately predicting a MB diagnosis. In the multivariate analysis, MHR (p = 0.013) was found to be a significant independent predictor of the presence of MB, after adjusting for other risk factors. Conclusion: The present study revealed a significant correlation between MHR and MB.

Resumo Fundamento: A avaliação da razão de monócitos para lipoproteínas de alta densidade (MHR, sigla em inglês) é uma nova ferramenta para se prever o processo inflamatório, o qual desempenha um papel importante na aterosclerose. A ponte miocárdica (PM) é considerada uma condição benigna com desenvolvimento de arteriosclerose, particularmente no segmento proximal da ponte. Objetivo: Avaliar a relação entre a MHR e a presença de PM. Métodos: Examinamos concecutivamente pacientes encaminhados para angiografia coronariana entre janeiro de 2013 e dezembro de 2016, e um total de 160 pacientes, uma parcela dos quais com PM, e outra com artérias coronárias normais, foram incluídos no estudo. As características angiográficas, demográficas e clínicas dos pacientes foram revisadas a partir de registros médicos. Monócitos e colesteróis HDL foram medidos através de hemograma completo. A MHR foi calculada como a razão entre a contagem absoluta de monócitos e o valor do colesterol HDL. Os valores de MHR foram divididos em três tercis, da seguinte forma: tercil inferior (8,25 ± 1,61); tercil moderado (13,11 ± 1,46); e tercil superior (21,21 ± 4,30). Considerou-se significativo um valor de p < 0,05. Resultados: A MHR foi significativamente maior no grupo com PM, em comparação com grupo controle com artérias coronárias normais. Verificamos que a prevalência de PM (p=0,002) aumentou à medida que se elevavam os tercis de MHR. A razão monócitos-colesterol HDL com ponto de corte de 13,35 apresentou sensibilidade de 59% e especificidade de 65,0% (área ROC sob a curva: 0,687, IC95%: 0,606-0,769, p < 0,001) na predição acurada do diagnóstico de PM. Na análise multivariada, a MHR (p = 0,013) mostrou-se um preditor independente significativo da presença de PM, após ajustes para outros fatores de risco. Conclusão: O presente estudo revelou uma correlação significativa entre MHR e PM.

Humans , Male , Female , Adult , Middle Aged , Monocytes , Myocardial Bridging/blood , Lipoproteins, HDL/blood , Reference Values , Blood Cell Count , Case-Control Studies , Multivariate Analysis , Regression Analysis , Risk Factors , Sensitivity and Specificity , Coronary Angiography , Statistics, Nonparametric , Atherosclerosis/blood , Cholesterol, LDL/blood
Article in Chinese | WPRIM | ID: wpr-772077


OBJECTIVE@#To investigate the expression of connexin 43 (Cx43) in peripheral blood monocytes (PBMCs) from patients with acute coronary syndrome (ACS) and its clinical implications.@*METHODS@#We prospectively collected the clinical data from 40 patients with ACS including 20 with unstable angina pectoris (UAP) and 20 with acute myocardial infarction (AMI) admitted in our department between January, 2018 and June, 2018, with 20 healthy subjects undergoing routine physical examinations serving as the control group. Peripheral blood samples were obtained from all the participants and plasma and PBMCs were separated. Enzyme-linked immunosorbent assay (ELISA) and turbidimetric inhibition immunoassay (TIIA) were used for analysis of plasma levels of interleukin (IL)-1β and high sensitive C-reactive protein (hs-CRP), respectively; real-time quantitative RT-PCR and Western blotting were used to detect the mRNA and protein levels of Cx43 in the PBMCs.@*RESULTS@#Compared with the control group, the patients with UAP showed significantly increased plasma levels of IL-1β and hs-CRP ( < 0.001) and obviously elevated expressions of Cx43 at both mRNA and protein levels in the PBMCs ( < 0.001). Compared with the patients with UAP, the patients with AMI had significantly higher plasma IL-1β and hs-CRP levels ( < 0.001 and < 0.01) but lower expression levels of Cx43 in the PBMCs ( < 0.05).@*CONCLUSIONS@#Patients with UAP and AMI have activated inflammatory responses and reverse changes in Cx43 expression in the PBMCs, suggesting the different roles of Cx43 in the pathogenic mechanisms of different types of ACS.

Acute Coronary Syndrome , Angina, Unstable , C-Reactive Protein , Connexin 43 , Humans , Monocytes