Associação entre adiponectina e resistência insulínica em idosos com Diabetes Mellitus e intolerância à glicose

A adiponectina é um marcador metabólico, inversamente associada à RI, baixos níveis séricos têm importância como preditor de risco de desenvolvimento de DM2 e níveis elevados de adiponectina estão associados com diminuição do risco de DM2 em idosos

Marcadores inflamatórios em idosos intolerantes e diabéticoscom resistência insulínica

Os pacientes com TGA e DM2 apresentaram maior prevalência de RI em relação aos indivíduos normoglicêmicos (p=0,028). Não houve diferença estatística nos valores de IL-6 e TNF-alfa entre os pacientes com TGN, TGA e DM2. Porém, a presença da RI esteve associada ao aumento sérico dos marcadores inflamatórios IL-6 e TNF-alfa (p=0,001 e p=0,018, respectivamente) . Conclusão: assim como em pacientes adultos jovens, idosos com resistência insulínica, independentemente de serem intolerantes à glicose ou diabéticos, apresentam maior concentração plasmática de mediadores inflamatórios

Relato de caso: demência por Biperideno

Conforme descrito na literatura brasileira o medicamento biperideno, em virtude de sua ação anticolinérgica, pode ser causa de demência em idosos, talvez pacientes que apresentem baixa reserva colinérgica sejam mais sujeitos a desenvolverem demência por esta medicação

Extensively drug-resistant tuberculosis: a case report and literature review

Extensively drug-resistant tuberculosis (XDR-TB) is an emerging health problem that threatens tuberculosis (TB) control worldwide, since suitable treatment for this disease has not yet been found. We report a case of secondary pulmonary XDR-TB in a 54-year-old, HIV-negative male from Goiânia, Brazil. The patient had long-standing pulmonary tuberculosis (nine years) with extensive bilateral lung damage and had been treated with multiple antituberculosis drugs (self-administered) before XDR-TB diagnosis. The strain of Mycobacterium tuberculosis was resistant to R- rifampicin, H-isoniazid, E-ethambutol, Eto-ethionamide, Ofx-ofloxacin, and Am-amikacin. This patient died with multiple organ failure due to sepsis secondary to bacterial pneumonia.

Cellular responses to MPT-51, GlcB and ESAT-6 among MDR-TB and active tuberculosis patients in Brazil.

Multi-drug resistant pulmonary tuberculosis (MDR-TB) may result from either insufficiency of the host cellular immune response or mycobacterial mechanisms of resistance. Mycobacterium tuberculosis-specific CD8+ and CD4+ T lymphocytes from MDR-TB patients are poorly studied. The aim of this study was to evaluate CD4+IFN-gamma+, CD4+IL-10+, CD8(+)IFN-gamma+ and CD8+IL-10+ cell populations by flow cytometry in non-resistant TB and multi-drug resistant tuberculosis (MDR-TB) patients from mid-central Brazil after stimulation with MPT-51, GlcB and ESAT-6 recombinant antigens from M. tuberculosis in comparison to tuberculin skin test negative (TST) healthy individuals. Non-resistant TB patients present specific cellular responses (CD4 and CD8, both IFN-gamma and IL-10) to GlcB, MPT-51 and ESAT-6; while MDR-TB patients present only CD8+IFN-gamma+ responses to ESAT-6 and CD8+IL-10+ responses to GlcB and ESAT-6. The results show that MDR-TB patients present impaired specific CD4 IFN-gamma and IL-10 responses and increased/normal specific CD8 IFN-gamma and IL-10 responses. This suggests an important role for CD8 function in these patients.

Extensively drug-resistant tuberculosis: a case report and literature review.

Extensively drug-resistant tuberculosis (XDR-TB) is an emerging health problem that threatens tuberculosis (TB) control worldwide, since suitable treatment for this disease has not yet been found. We report a case of secondary pulmonary XDR-TB in a 54-year-old, HIV-negative male from Goiânia, Brazil. The patient had long-standing pulmonary tuberculosis (nine years) with extensive bilateral lung damage and had been treated with multiple antituberculosis drugs (self-administered) before XDR-TB diagnosis. The strain of Mycobacterium tuberculosis was resistant to R- rifampicin, H-isoniazid, E-ethambutol, Eto-ethionamide, Ofx-ofloxacin, and Am-amikacin. This patient died with multiple organ failure due to sepsis secondary to bacterial pneumonia.

Síndrome de Evans na evolução da doença de Still / Evans syndrome occurring in Still's disease

Objetivo: Mostrar a importância do diagnóstico precoce e tratamento da síndrome de Evans, ocorrendo como complicação de uma doença sistêmica, a doença de Still. Descrição: Relato do caso da paciente A.L.F.T., 4 anos e 1 mês, com diagnóstico de doença de Still há um ano e cuja evolução, durante sua hospitalização, complicou-se com a síndrome de Evans. Comentário: A síndrome de Evans, ocorrendo no curso da doença de Still, é uma entidade clínica infreqüente, mas importante em termos do prognóstico do paciente. É difícil a distinção dos sintomas dessas enfermidades e a estratégia de tratamento constitui uma urgência.

Detection of hematopoietic maturation abnormalities by flow cytometry in myelodysplastic syndromes and its utility for the differential diagnosis with non-clonal disorders.

The diagnosis of myelodysplastic syndromes (MDS) is based on peripheral cytopenias, bone marrow (BM) morphology and karyotyping. This may be difficult in cases with few dysplastic elements in BM and a normal karyotype. We examined the utility of flow cytometric analysis for the differential diagnosis between MDS and non-clonal disorders (NCD) presenting peripheral cytopenias. Quantitative assessment of CD45, CD16, CD13, CD11b, CD10 and CD64 in granulocytes and monocytes, and CD71 and glycophorin A in erythroblasts besides CD34+ cell count was performed in BM of 31 consecutive newly diagnosed patients with MDS, 11 patients with NCD and 11 healthy controls (BM donors). In MDS, the median number of phenotypic abnormalities found was 3 (1-8). The WPSS score showed a correlation with the total number of changes per case (r=0.48; p=0.002). Decreased SSC in promyelocytes correlated with the peripheral neutrophil count (r=-0.46; p=0.007). In NCD, the normal variation of antigen expression along granulocytic and erythroblast maturation was always maintained. In the discriminant analysis, SSC of CD34+ cells, together with that of promyelocytes and metamyelocytes were able to correctly classify 87% of the cases as clonal or non-clonal. Our quantitative approach permitted to detect at least one abnormality in antigen expression in every case of MDS. However, the most important parameters for differential diagnosis with NCD were the analysis of the granularity in immature cells, especially of the granulocytic series.

Maturation-associated immunophenotypic abnormalities in bone marrow B-lymphocytes in myelodysplastic syndromes.

Recent studies concerning the pathophysiology of myelodysplastic syndromes (MDS) have shown evidences for the existence of complex interactions between hematopoietic stem cells and the bone marrow (BM) microenvironment. We analyzed the B-lymphocyte maturation in BM of patients with MDS. For this purpose, 41 newly-diagnosed patients were analyzed. Enumeration and characterization of CD34+ and CD34- B-cell precursors and mature B-lymphocytes was performed using multiparameter flow cytometry. BM from eight transplant donors and six orthopedic surgery patients were used as controls. CD34+/CD45(lo) B-cells were found in 17/22 patients with RA/RARS and in 5/13 with RAEB. In patients with RAEB-t and CMML no CD34+ B-cell precursors could be detected. A positive correlation was found between CD34+ and CD34- B-cell precursors (r=0.52). CD34+ B-cell precursors presented an inverse correlation with BM percentage of blasts and peripheral leukocytes and a positive one with hemoglobin. Asynchronous antigen expression (CD19+/CD79a- cells) was found in 7/11 cases of RA/RARS and 6/18 cases of RAEB in which this phenotype was examined. Abnormal patterns of expression for at least one antigen was found in 91% of RA/RARS cases and in 74% of RAEB. Underexpression of TdT and CD79a were the most frequent abnormalities. Our results present evidences of an abnormal B-cell maturation in MDS. This may be an evidence that B-lymphocytes are derived of the abnormal clone. But it may also be the consequence of influences of abnormalities of BM microenvironment leading to an impaired commitment and maturation of the B-cell line in MDS. Studies performed with purified well-characterized B-cells may further elucidate these abnormalities.

Evaluation of the response of cortisol, corticotropin and blood platelets kinetics after laparoscopic and open cholecystectomy

OBJETIVO: Comparar o comportamento dos níveis séricos de cortisol, ACTH e da cinética das plaquetas nas colecistectomias laparoscópica e aberta. MÉTODOS: Esse estudo prospectivo compara 31 pacientes portadores de colelitíase sintomática que se submeteram a colecistectomia eletiva, sendo que 17 por via laparoscópica e 14 por via aberta. Amostras de sangue periférico foram colhidas na internação do paciente, na indução anestésica, às 2, 6, 12, 24 e 48 horas da incisão cirúrgica. A contagem de plaquetas foi realizada no microscópio óptico- aumento de 100X- pela coloração de Hematoxilina- eosina . As dosagens de cortisol e ACTH foram realizadas através da técnica de quimioluminescência. RESULTADOS: Observou-se que as concentrações de cortisol e ACTH elevaram-se significativamente (p< 0.05) nas primeiras horas em relação aos valores do pré-operatório. Às 2 horas, houve elevação maior do nível de cortisol no grupo laparoscópico com diferença estatisticamente significante (p=0,0365;p<0.05) em relação ao grupo aberto. Observou-se retorno a valores basais no pós-operatório tardio (24 e 48 horas) somente para o ACTH, enquanto que o nível sérico de cortisol manteve-se elevado nesse mesmo período, com valores maiores e estatisticamente significante ( p24=0,0248 e p48=0,0320;p< 0.05) no grupo aberto em relação ao laparoscópico. As plaquetas apresentaram curvas de respostas diferentes entre os grupos, todavia mantiveram níveis normais em todos os momentos estudados. Não houve diferença estatística significante (p<0.05) entre os períodos pós e pré-operatórios em ambos os grupos. CONCLUSÃO: A resposta hormonal ocorre em ambos procedimentos estudados, porém o estresse cirúrgico é maior e mais duradouro na cirurgia aberta quando comparada à laparoscópica. Não obstante, a cinética das plaquetas não mostrou variação significativa em ambos procedimentos diante da injúria tecidual.

Evaluation of the response of cortisol, corticotropin and blood platelets kinetics after laparoscopic and open cholecystectomy.

PURPOSE: To compare the behavior of serum cortisol and ACTH levels and platelet kinetics after laparoscopic and open cholecystectomy. METHODS: In this prospective study, 31 patients with symptomatic cholelithiasis submitted to elective cholecystectomy, 17 by the laparoscopic route and 14 by the open route, were compared. Peripheral blood samples were collected on admission of the patient, during anesthetic induction, and 2, 6, 12, 24 and 48 hours after the surgical incision. Platelets were counted in hematoxylin-eosin-stained specimens under a light microscope at 100x magnification. Cortisol and ACTH were measured by chemiluminescence. RESULTS: Cortisol and ACTH levels showed a significant increase (p < 0.05) within the first hours after surgery compared to preoperative values. At 2 hours, a significantly higher cortisol concentration was observed in the laparoscopic group compared to the open surgery group (p = 0.0365). A return to basal levels during the later postoperative periods (24 and 48 hours) was only observed for ACTH, while serum cortisol continued to be elevated during the same period, being significantly higher in the open surgery group than in the laparoscopic group (p24 = 0.0248 and p48 = 0.032). Different platelet response curves were obtained for the two groups, but their levels were normal at all times studied. No significant difference (p > 0.05) between the post- and preoperative periods was observed for either group. CONCLUSION: A hormonal response was observed for both procedures studied, but the surgical stress was higher and longer lasting in open surgery compared to the laparoscopic approach. However, no significant variation in platelet kinetics in response to tissue injury was observed between the two procedures.

Factors influencing survival in myelodysplastic syndromes in a Brazilian population: comparison of FAB and WHO classifications.

The WHO classification for myelodysplastic syndromes (MDS) has introduced new categories with prognostic relevance. Our aim was to examine the predictive value of the WHO and the FAB classification compared to parameters of peripheral blood, bone marrow and IPSS. Clinical data, peripheral blood counts, bone marrow (BM) cytology and histology and survival were analyzed in consecutive newly diagnosed adult patients with MDS. All cases were diagnosed according to FAB criteria and reclassified by the WHO proposal. Among 150 patients entering the study median age was 58 years (12-90). According to FAB, 90 patients had refractory anemia (RA), 18 sideroblastic anemia, 34 refractory anemia with excess of blasts (RAEB), three RAEB-t and five chronic myelomonocytic leukemia. Using the WHO proposal, one half of the patients with RA changed category. One patient had the 5q-syndrome. There were 25 cases with refractory cytopenias with multilineage dysplasia (RCMD) and 23 WHO "unclassified". These last patients presented few cell atypias, favorable IPSS and a good survival as has been described for refractory cytopenias in pediatric MDS. Hypocellular BM was found in 24% of the patients. Karyotype was available in only 85 cases. In the univariate analysis, both classifications, hemoglobin values, hypercellular bone marrow and IPSS had an influence on survival. Using the bootstrap resampling as stability test for the model created by the multivariate analysis, the WHO classification entered the model in 73%, FAB in 38% and IPSS in only 7%. Therefore, in a setting with a high number of low-risk MDS, the WHO classification is the best predictor of survival of the patients.

Flow cytometric analysis of the expression of Fas/Fasl in bone marrow CD34+ cells in myelodysplastic syndromes: relation to disease progression.

The role of apoptosis in the pathobiology of myelodysplastic syndromes (MDS) remains controversial. We studied the expression of CD95 and CD95L in CD34+ cells of patients with newly diagnosed MDS by flow cytometry, and examined the relation between this expression and FAB and WHO types, total number of CD34+ bone marrow (BM) cells and the degree of peripheral cytopenias. The patients with refractory anemia (RA) and sideroblastic anemia showed CD34+ cells in numbers comparable to normal donors, but had a higher percentage of CD95/CD34 and CD95L/CD34 positive cells. An inverse correlation was found between these cells and the total CD34+ cells. This was also observed when only patients with RA were analyzed. In RAEB, however, CD95/CD95L expression correlated with CD34+ cells but not with the percentage of BM blasts. After classification by the WHO proposal, the patients with refractory cytopenias with multilineage dysplasia showed features intermediary between RA and RAEB. No significant correlation was seen between the expression of CD95/CD95L and the peripheral blood counts. These results are in keeping with the hypothesis that, as the number of MDS precursors increases during disease progression they become less succeptible to apoptosis.

Changes in hemopoietic precursors after treatment of low-risk myelodysplasia with amifostine.

BACKGROUND: Clinical studies have shown that amifostine (AMF) improves peripheral cytopenias in myelodysplastic syndromes (MDS). We studied the expression of Fas/FasL on CD34+ cells in low risk MDS and its change after AMF treatment. PATIENTS AND METHODS: Patients received AMF 400 mg/m2 3x/week for 3 weeks and 2 weeks off treatment. Peripheral blood counts and BM cytology were analysed before and after 2 courses. Quantification of CD34+ cells and CD34/CD95 and CD34/CD95L ones were performed by flow cytometry. RESULTS: Seventeen patients were treated. After 2 months, 8 patients showed a rise in neutrophil count. Hemoglobin increased in 1 and thrombocytes in 2 patients. Before treatment, responding patients presented a significantly lower expression of Fas (median 53%) and FasL (median 26%) than non-responders (85% and 70%, respectively). BM lymphocytes were significantly lower in responders (median 14.5% and 27.4%, respectively). In responders CD34+ cells decreased after treatment. The change in neutrophil count after treatment presented an inverse correlation with the percentage of BM lymphocytes before treatment (r = 0.0-0.58; p = 0.02). CONCLUSION: Response to AMF may be influenced by the intensity of the immune reaction in BM.