Influence of Pre-treatment Lymphocyte/Monocyte Ratio and Neutrophil/Lymphocyte Ratio on the Prognosis of Patients with Extranodal NK/T-Cell Lymphoma / 中国实验血液学杂志

OBJECTIVE@#To explore the influence of lymphocyte-to-monocyte ratio (LMR) and neutrophil-to-lymphocyte ratio (NLR) on the prognosis of patients with extranodal NK/T cell lymphoma (ENKTL).@*METHODS@#The clinical data of 203 patients with ENKTL admitted to the First Affiliated Hospital of Zhengzhou University from January 2011 to January 2020 were retrospectively analyzed. The ROC curve determined the limit values of LMR and NLR; Categorical variables were compared using a chi-square test, expressed as frequency and percentage (n,%). Continuous variables were expressed as medians and extremes and compared with the Mann-Whitney U test; Progression-free survival (PFS) and overall survival (OS) of different grouped LMR and NLR patients were analyzed using Kaplan-Meier curves and compared with log-rank tests. The COX proportional risk regression model was used to perform one-factor and multi-factor analysis of PFS and OS.@*RESULTS@#The optimal critical values of LMR and NLR were determined by the ROC curve, which were 2.60 and 3.40, respectively. LMR≤2.60 was more likely to occur in patients with bone marrow invasion (P=0.029) and higher LDH (P=0.036), while NLR≥3.40 was more likely to occur in patients with higher ECOG scores (P=0.002), higher LDH (P=0.008), higher blood glucose (P=0.024), and lower PLT (P=0.010). Kaplan-Meier survival analysis showed that PFS and OS of patients in the high LMR group were significantly better than the low LMR group, while PFS and OS in the low NLR group were significantly better than the high NLR group. The results of multivariate COX analysis showed that EBV-DNA positive (P=0.047), LMR≤2.60 (P=0.014), NLR≥3.40 (P=0.023) were independent risk factors affecting PFS in patients with ENKTL. LMR≤2.60 (P<0.001), NLR≥3.40 (P=0.048), and high β2-MG (P=0.013) were independent risk factors affecting OS in patients with ENKTL.@*CONCLUSION@#Low LMR and high NLR before treatment are associated with poor prognosis in patients with ENKTL, which also can be used as an easily testable, inexpensive, and practical prognostic indicator in the clinic.

Polysaccharide Krestin Prevents Alzheimer's Disease-type Pathology and Cognitive Deficits by Enhancing Monocyte Amyloid-β Processing / 神经科学通报·英文版

Deficits in the clearance of amyloid β protein (Aβ) by the peripheral system play a critical role in the pathogenesis of sporadic Alzheimer's disease (AD). Impaired uptake of Aβ by dysfunctional monocytes is deemed to be one of the major mechanisms underlying deficient peripheral Aβ clearance in AD. In the current study, flow cytometry and biochemical and behavioral techniques were applied to investigate the effects of polysaccharide krestin (PSK) on AD-related pathology in vitro and in vivo. We found that PSK, widely used in therapy for various cancers, has the potential to enhance Aβ uptake and intracellular processing by human monocytes in vitro. After administration of PSK by intraperitoneal injection, APP/PS1 mice performed better in behavioral tests, along with reduced Aβ deposition, neuroinflammation, neuronal loss, and tau hyperphosphorylation. These results suggest that PSK holds promise as a preventive agent for AD by strengthening the Aβ clearance by blood monocytes and alleviating AD-like pathology.

Myelodysplastic syndrome: validation of flow cytometry multilineage score system / Síndrome mielodisplásica: validação de ficha de escore multilinhagem por citometria de fluxo

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.

Increased ROS production and DNA damage in monocytes are biomarkers of aging and atherosclerosis

BACKGROUND: New evidence demonstrates that aging and dyslipidemia are closely associated with oxidative stress, DNA damage and apoptosis in some cells and extravascular tissues. However, in monocytes, which are naturally involved in progression and/or resolution of plaque in atherosclerosis, this concurrence has not yet been fully investigated. In this study, we evaluated the influence of aging and hypercholesterolemia on serum pro-inflammatory cytokines, oxidative stress, DNA damage and apoptosis in monocytes from apolipoprotein E-deficient (apoE-/-) mice compared with age-matched wild-type C57BL/6 (WT) mice. Experiments were performed in young (2-months) and in old (18-months) male wild-type (WT) and apoE-/- mice. RESULTS: Besides the expected differences in serum lipid profile and plaque formation, we observed that atherosclerotic mice exhibited a significant increase in monocytosis and in serum levels of pro-inflammatory cytokines compared to WT mice. Moreover, it was observed that the overproduction of ROS, led to an increased DNA fragmentation and, consequently, apoptosis in monocytes from normocholesterolemic old mice, which was aggravated in age-matched atherosclerotic mice. CONCLUSIONS: In this study, we demonstrate that a pro-inflammatory systemic status is associated with an impairment of functionality of monocytes during aging and that these parameters are fundamental extra-arterial contributors to the aggravation of atherosclerosis. The present data open new avenues for the development of future strategies with the purpose of treating atherosclerosis.

Microparticles as Potential Biomarkers of Cardiovascular Disease / Micropartículas como Possíveis Biomarcadores da Doença Cardiovascular

Primary prevention of cardiovascular disease is a choice of great relevance because of its impact on health. Some biomarkers, such as microparticles derived from different cell populations, have been considered useful in the assessment of cardiovascular disease. Microparticles are released by the membrane structures of different cell types upon activation or apoptosis, and are present in the plasma of healthy individuals (in levels considered physiological) and in patients with different pathologies. Many studies have suggested an association between microparticles and different pathological conditions, mainly the relationship with the development of cardiovascular diseases. Moreover, the effects of different lipid-lowering therapies have been described in regard to measurement of microparticles. The studies are still controversial regarding the levels of microparticles that can be considered pathological. In addition, the methodologies used still vary, suggesting the need for standardization of the different protocols applied, aiming at using microparticles as biomarkers in clinical practice.

A prevenção primária da doença cardiovascular constitui uma opção de grande relevância pelos seus impactos na saúde. Alguns biomarcadores têm sido considerados úteis na avaliação da doença cardiovascular, dentre eles micropartículas originadas de diferentes populações de células. Micropartículas são estruturas liberadas pela membrana de diferentes tipos celulares após ativação ou apoptose, presentes tanto no plasma de indivíduos saudáveis (níveis considerados fisiológicos) quanto em portadores de diferentes doenças. Muitos estudos têm sugerido uma associação entre micropartículas e diferentes condições patológicas, destacando-se a relação com o desenvolvimento das doenças cardiovasculares. Além disso, têm sido descritos os efeitos de diferentes terapias hipolipemiantes na mensuração de micropartículas. Os estudos ainda são controversos quanto aos níveis de micropartículas que possam ser considerados patológicos, e os métodos utilizados ainda são variados, o que sugere a necessidade da padronização dos diferentes protocolos utilizados, visando à utilização de micropartículas como biomarcadores úteis na prática clínica.

Avaliação das subpopulações de monócitos em pacientes com tuberculose pulmonar / Evaluation of subpopulations of monocytes in patients with pulmonary tuberculosis

Os macrófagos são componentes importantes da resposta imune inata contra o Mycobaterium tuberculosis (Mtb) e podem desempenhar um papel importante na patogênese da tuberculose (TB). Macrófagos são derivados dos monócitos, os quais são classificados em subpopulações a partir da expressão da molécula de superfície CD14 e CD16. São denominados de clássicos, intermediários e não clássicos, e possuem diferenças funcionais e fenotípicas. Os fatores que levam ao desenvolvimento de TB ativa ainda não são claros. Um desequilíbrio entre subpopulações de monócitos circulantes pode estar envolvido na imunopatogênese da TB, uma vez que macrófagos são células importantes da resposta imune inicial da doença. Assim, neste estudo avaliou-se os subgrupos de monócitos em pacientes com TB ativa e latente (TBL). Voluntários com TB ativa, TBL e indivíduos saudáveis foram recrutados para avaliação de frequência, níveis de ativação e produção de citocinas dos subgrupos de monócitos circulantes e após a estimulação antigênica por citometria de fluxo. Nossos resultados não demonstraram diferenças significativas nas frequências, níveis de ativação e produções de citocinas das subpopulações de monócitos entre os grupos estudados. No entanto, pacientes com TB ativa tiveram um aumento na frequência dos monócitos clássicos ativados após estimulação antigênica comparados com os controles saudáveis. Não observou-se uma expansão das subpopulações CD16+ em pacientes TB. Por outro lado, se observou uma expansão dos monócitos CD16...

Macrophages are important components of the innate immune response against Mycobacterium tuberculosis (Mtb) and may play an important role in the pathogenesis of tuberculosis (TB). Macrophages are derived from monocytes, which are classified into subpopulations from the expression of CD14 and CD16 surface molecule. They are denominated classics, intermediate and non-classical, and have functional and phenotypic differences. The factors that lead to the development of active tuberculosis are not clear yet. However, an imbalance between subpopulations of monocytes may be involved in the immunopathogenesis of TB, since macrophages are important cells in the initial immune responses of the disease. In this study we evaluated the monocyte subsets in patients with active and latent TB (ILTB). Volunteers with active TB, ILTB and healthy subjects were recruited to evaluate the frequency, levels of activation and cytokine production of blood monocytes subsets circulating and after the antigenic stimulation by flow cytometry. Our results did not show significant differences in the frequency, activation levels and cytokine production of monocytes subsets between studies groups. However, patients with active TB have an increased of frequency and activated levels of classical monocytes after antigenic stimulation compared to healthy controls. An expansion of CD16+ in monocytes subsets of TB patient was not observed. Moreover, it was observed an expansion and increased activation of CD16...

Effects of Epstein-Barr virus on the development of dendritic cells derived from cord blood monocytes: an essential role for apoptosis

OBJECTIVE: Epstein-Barr virus (EBV) is a ubiquitous human γ-herpes virus, which can adapt and evade host immune defense. Dendritic cells (DCs) play a pivotal role in the initiation and maintenance of immune responses. This study investigated the effects of EBV on cord blood monocytes derived DCs (CBDC). METHODS: Monocytes were isolated from cord blood and cultured in medium containing recombinant IL-4 and GM-CSF to induce DCs development. B95-8 supernatant was added in monocytes culture medium for EBV infection at day 0. Phenotypic characterization of DCs, apoptotic cells, and mitochondrial membrane potential (MMP) were detected by flow cytometry. The morphology was observed by Hoechst 33258 staining and TUNEL staining, the expression of X-linked inhibitor of apoptosis protein (XIAP) was detected by Western blotting assay and caspase 3, 8 and 9 activity was measured. RESULTS: Phenotypic characterization of DCs was changed in EBV-treated group. Chromatin condensation and DNA fragmentation were observed in EBV induced CBDC apoptosis. In addition, caspase 3, caspase 8, and caspase 9 activation were enhanced in the EBV-treated group. This was accompanied by the loss of MMP. Furthermore, XIAP expression was down-regulated in the EBV-treated group and compared to mock-infected group. CONCLUSION: These results suggested that EBV could inhibit CBDC phenotypic differentiation, and induce CBDC apoptosis in caspase-dependent manner with involvement of the mitochondrial pathway. This might help EBV to evade host immune responses to establish persistent infection.

Dengue-2 infection and the induction of apoptosis in human primary monocytes

Monocytes/macrophages are important targets for dengue virus (DENV) replication; they induce inflammatory mediators and are sources of viral dissemination in the initial phase of the disease. Apoptosis is an active process of cellular destruction genetically regulated, in which a complex enzymatic pathway is activated and may be trigged by many viral infections. Since the mechanisms of apoptotic induction in DENV-infected target cells are not yet defined, we investigated the virus-cell interaction using a model of primary human monocyte infection with DENV-2 with the aim of identifying apoptotic markers. Cultures analyzed by flow cytometry and confocal microscopy yielded DENV antigen positive cells with rates that peaked at the second day post infection (p.i.), decayed afterwards and produced the apoptosis-related cytokines TNF-á and IL-10. Phosphatidylserine, an early marker for apoptosis, was increased at the cell surface and the Fas death receptor was upregulated at the second day p.i. at significantly higher rates in DENV infected cell cultures than controls. However, no detectable changes were observed in the expression of the anti-apoptotic protein Bcl-2 in infected cultures. Our data support virus modulation of extrinsic apoptotic factors in the in vitro model of human monocyte DENV-2 infection. DENV may be interfering in activation and death mechanisms by inducing apoptosis in target cells.

Sly Disease: Mucopolysaccharidosis Type VII.

A 6 month-old infant presenting with severe mitral regurgitation was found to have hepatosplenomegaly, corneal clouding, and Alder-Reilly granules in the leucocytes. Extremely low levels of beta glucuronidase confirmed the diagnosis of Sly disease (Mucopolysaccharidosis VII). This is the first case of MPS VII reported from India.

Aumento de CD4 en monocitos de pacientes con Hemofilia VIH positivos / Increased CD4 in monocytes from HIV+ Hemophilia patients

El sistema monocito macrofágico (M/M) juega un papel central en la infección por el virus de la inmunodeficiencia humana (VIH) y la expresión del antígeno CD4 sobre la superficie del M/M es un factor clave para la entrada del VIH a células susceptibles. En este trabajo evaluamos los niveles del receptor CD4 en monocitos de pacientes con hemofilia (He) infectados o no con el VIH (He-VIH+). Se estudiaron treinta pacientes He-VIH+, cuatro pacientes seronegativos (He-VIH-) y veinte dadores normales voluntarios. La evaluación fenotípica de los monocitos fue realizada por citometría de flujo a partir de sangre periférica teñida con anticuerpos monoclonales anti CD45, CD3, CD4 y CD14. Se encontró que el porcentaje de monocitos CD4+ estaba incrementado en todos los grupos de pacientes (incluyendo He-VIH-), pero fue más alto en pacientes sintomáticos He-VIH+. Además el valor más frecuente de intensidad de fluorescencia para CD4 de la población de monocitos de estos pacientes, estaba desplazado hacia zonas de mayor intensidad respecto de los individuos normales. Esto indicaría una expresión incrementada del número de moléculas CD4 sobre la membrana celular de los monocitos. Las características de esta células en los pacientes He-VIH+, podrían favorecer la persistencia y la diseminación viral.

Cerebro-spinal fluid cytomorphology in tuberculous meningitis--a preliminary report.

The morphology of cells in centrifuged cerebrospinal fluid (C.S.F.) of 25 patients with tuberculous meningitis (T.B.M.) in different stages of the illness is presented. Blood brain barrier studies were also done in 6 patients. Maximum variability of cells in the initial stages of the illness and persistence of polymorphs in the later stages of the illness is noted. No correlation was established between cerebrospinal fluid cytomorphology and complications of the illness.

Malarial placental infection and low birth weight babies.

Two-hundred fifty-six mothers and their newborns were subjected to clinical and haematological tests for the evidence of malaria. Placentae of these were examined histopathologically for malarial parasites and malarial pigment. Forty six placentae showed scanty malarial pigment ingested by monocytes. These appearances were associated with focal syncytial necrosis and proliferation of cytotrophoblastic cells. Plasmodium falciparum was found in cord blood of six cases. The mean weight of newborns born to mothers having no evidence of malarial placental infection was 2.763 kg, while mean weight of newborns belonging to infected placentae was 2.143 kg. The difference was highly significant.

Inmunopatología del SIDA / Immunopathology of AIDS

El virus de la inmunodeficiencia humana (HIV) es un retrovirus, que exhibe tropismo selectivo por células del sistema inmunológico. Tiene acceso al interior celular mediante la molécula CD4, presente fundamentalmente sobre los linfocitos T colaboradores. La unión se da por interacción entre el CD4 y una glicoproteína de la cápside viral, la gp120. La infección de la célula es irreversible, ya que el material genético viral se incorpora, en forma de provirus, el genoma de la célula huésped, donde puede permanecer en estado latente durante un período de tiempo que varía entre unos meses y varios años. La activación del provirus se da en forma conjunta con la activación celular, lleva a la producción elevada de partículas virales. El hecho más significativo es la disminución de células T CD4+ atribuido, al menos en parte, al efecto citopático del virus. De la población total de linfocitos CD4+, solo un pequeño número es susceptible de infección viral, lo cual dificulta la interpretación de su marcada disminución. Teniendo en cuenta que el blanco preferido del virus es una célula central dentro del sistema inmune, puede comprenderse la amplia gama de alteraciones inmunológicas, que presentan los individuos infectados, que lleva a la severa inmunodeficiencia observada en los pacientes con SIDA