Your browser doesn't support javascript.
Mostrar: 20 | 50 | 100
Resultados 1 - 5 de 5
Mais filtros

Base de dados
Tipo de estudo
Intervalo de ano de publicação
Infect Drug Resist ; 12: 3807-3816, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-31824178


Purpose: Talaromyces marneffei (T.M) is an intracellular opportunistic fungus that causes invasive mycosis in patients with or without human immunodeficiency virus (HIV) infection. Hemophagocytic lymphohistiocytosis (HLH) caused by T.M infection is extremely rare. Here, we analyzed the clinical features, immune mechanisms, treatment, and prognosis related to this comorbidity. Patients and Methods: This retrospective study was conducted between August 2012 and February 2019 at multiple research centers. Patients who presented with culture and/or histopathological proof of talaromycosis-associated HLH were included. Results: HIV-negative patients (n = 126) were enrolled. Of nine patients with T.M infection combined with secondary HLH, six were preschool children (five boys and one girl), and three were adults (two men and one woman). Seven of these nine had underlying diseases or recurrent infections. The most common symptoms were fever, anemia, hypoproteinemia, cough, weight loss, oral thrush, lymphadenopathy, hepatomegaly, splenomegaly, digestive symptoms, joint pain, and dyspnea. All patients showed reduced hemoglobin concentrations and platelet numbers. Liver dysfunction, hyperferritinemia, elevated lactate dehydrogenase, and low natural killer cell numbers were observed. Eight of nine patients received antifungal therapy, one patient did not receive therapy, and two of nine patients received anti-HLH therapy. Four died during treatment. Conclusion: T.M fungemia associated with HLH was related to high mortality. Once diagnosed, timely and effective antifungal treatments and supportive care are essential.

Int J Chron Obstruct Pulmon Dis ; 14: 2697-2709, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-31819402


Purpose: Elastin peptides (EP) can induce lung inflammation and emphysema. Erythromycin has been shown to decrease acute exacerbation frequency and delay lung function decline in chronic obstructive pulmonary disease patients and ameliorate emphysema in murine models; however, the mechanism remains unclear. We aimed to observe the preventive and immunomodulatory effects of erythromycin in a mouse model of EP-induced emphysema. Methods: In the in vivo study, Balb/c mice were treated with EP intranasally on day 0, and then administered erythromycin (100 mg/kg) or vehicle orally on day 1, which was continued every other day. Mice exposed to cigarette smoke were used as an emphysema positive control. The severity of emphysema and inflammation in the lungs of EP-exposed mice with or without erythromycin treatment were observed on day 40 after EP administration. In the in vitro study, naïve CD4+T cells were isolated from healthy mice spleens and stimulated by EP with or without erythromycin incubation. Flow cytometry was used to measure the proportions of Th1, Th17, and Treg cells. ELISA was used to detect cytokine levels of IFN-γ, IL-17, IL-6, and TGF-ß. Transcript levels of Ifnγ, IL17a, and Foxp3 were evaluated by qRT-PCR. Results: After exposure to EP, Th1 and Th17 cell percentages and the levels of inflammatory cytokines increased in vivo and in vitro, while Treg cells decreased in vivo. Erythromycin reduced IFN-γ, IL-17, IL-6 inflammatory cytokines, MLI, and the inflammation score in the lungs of EP-exposed mice. In vitro, erythromycin also limited Th17 and Th1 cell differentiation and downregulated transcript levels of Ifnγ and IL17a in the EP-stimulated CD4+T cells. Conclusion: The Th1 and Th17 cell responses were increased in EP-induced emphysema. Prophylactic use of erythromycin effectively ameliorated emphysema and modulated CD4+T cells responses in EP-induced lung inflammation in mice.

Open Forum Infect Dis ; 6(10): ofz208, 2019 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-31660325


Background: Few reports of Talaromyces marneffei (TM) or cryptococcosis infections among HIV-negative patients with high-titeranti-IFN-γautoantibodies (nAIGAs) have been published. We investigated the clinical manifestations of patients with nAIGAs and TM infections. Methods: HIV-negative adults (≥18 years) were enrolled if they haddisseminated TM infection (group 1; further divided into nAIGAs positive [group 1P] and negative [group 1N]); cryptococcosis(pulmonary cryptococcosis and/or cryptococcosis of the brain)(group 2); pulmonary tuberculosis (group 3); and healthy controls (group 4) with nAIGAs detected. Complete histories, physical examinations, and routine clinical laboratory tests were obtained at baseline. Results: Overall, 88 participants were in the four groups (20,13,23, and 32 in groups 1 to 4, respectively). Significant differences occurred between groups with higher nAIGAs titers (P < 0.001), and higher total white-cell and absolute neutrophil counts (P < 0.001) in group1. Lungs (90.0%), lymph nodes (60.0%), skin (55.0%), and bones (50.0%) were most common sites of involvement. Significant differences in total white-cell and absolute neutrophil counts occurred between groups IP and 1N.Patients with recurrent TM infections, particularly group 1P, had higher initial nAIGA titer. Conclusions: Patients with persistent infection who died tended to have positive initial nAIGA titer. It suggests that nAIGAs may play a critical role in the pathogenesis of TM infections, and may be associated with more severe, refractory infection.

BMC Infect Dis ; 19(1): 745, 2019 Aug 27.
Artigo em Inglês | MEDLINE | ID: mdl-31455239


BACKGROUND: Due to the similar clinical, lung imaging, and pathological characteristics, talaromycosis is most commonly misdiagnosed as tuberculosis. This study aimed to identify the characteristics of talaromycosis pleural effusion (TMPE) and to distinguish TMPE from tuberculosis pleural effusion (TPE). METHODS: We enrolled 19 cases each of TMPE and TPE from Guangxi, China. Patients' clinical records, pleural effusion tests, biomarker test results, and receiver operating characteristic curves were analyzed. RESULTS: In total, 39.8% (65/163) of patients exhibited serous effusion, of whom 61 were non-human immunodeficiency virus (HIV)-infected patients; 68.85% of the non-HIV-infected patients (42/61) had TMPE. Thoracentesis was performed only in 19 patients, all of whom were misdiagnosed with tuberculosis and received long-term anti-tuberculosis treatment. In four of these patients, interleukin (IL)-23, IL-27, and interferon-gamma (IFN-γ) measurements were not performed since pleural effusion samples could not be collected because the effusion had been drained prior to the study. In the remaining 15 patients, pleural effusion samples were collected. Talaromyces marneffei was isolated from the pleural effusion and pleural nodules. Most TMPEs were characterized by yellowish fluid, with marked elevation of protein content and nucleated cell counts. However, neutrophils were predominantly found in TMPEs, and lymphocytes were predominantly found in TPEs (both p < 0.05). Adenosine deaminase (ADA) and IFN-γ levels in TMPEs were significantly lower than those in TPEs (all p < 0.05) and provided similar accuracies for distinguishing TMPEs from TPEs. IL-23 concentration in TMPEs was significantly higher than that in TPEs (p < 0.05), and it provided similar accuracy for diagnosing TMPEs. IL-27 concentrations in TMPEs were significantly lower than those in TPEs (all p < 0.05) but was not useful for distinguishing TMPE from TPE. CONCLUSIONS: Talaromycosis can infringe on the pleural cavity via the translocation of T. marneffei into the pleural space. Nonetheless, this phenomenon is still commonly neglected by clinicians. TMPE is a yellowish fluid with exudative PEs and predominant neutrophils. Higher neutrophil counts and IL-23 may suggest talaromycosis. Higher lymphocyte counts, ADA activity, and IFN-γ concentration may suggest tuberculosis.

Micoses/etiologia , Derrame Pleural/microbiologia , Tuberculose Pleural/diagnóstico , Adenosina Desaminase/metabolismo , Adolescente , Adulto , Idoso , Biomarcadores/metabolismo , Criança , Pré-Escolar , Estudos de Coortes , Feminino , Humanos , Lactente , Interferon gama/metabolismo , Subunidade p19 da Interleucina-23/metabolismo , Interleucinas/metabolismo , Linfócitos/microbiologia , Linfócitos/patologia , Masculino , Pessoa de Meia-Idade , Micoses/tratamento farmacológico , Micoses/microbiologia , Neutrófilos/microbiologia , Neutrófilos/patologia , Derrame Pleural/diagnóstico , Derrame Pleural/tratamento farmacológico , Curva ROC , Talaromyces/patogenicidade , Tuberculose Pleural/tratamento farmacológico , Tuberculose Pleural/etiologia
Chin Med J (Engl) ; 132(16): 1909-1918, 2019 Aug 20.
Artigo em Inglês | MEDLINE | ID: mdl-31348027


BACKGROUND: Little study has investigated the differences between Talatomyces marneffei (T. marneffei) respiratory infection and tuberculosis and the prognostic factors of such infection. This study investigated the characteristics and prognostic factors of T. marneffei infections with respiratory lesions and the causes of misdiagnosis. METHODS: Clinical characteristics and prognoses of patients with T. marneffei infections with respiratory system lesion were investigated. T. marneffei diagnosis followed isolation from clinical specimens using standard culture, cytology, and histopathology. Survival curves were estimated by using Kaplan-Meier analysis, with log-rank test to compare differences in survival rates between groups. Univariate and multivariate Cox regression analyses were also performed to assess significant differences in clinical characteristics of overall survival. RESULTS: Of 126 patients diagnosed with T. marneffei infections, 63 (50.0%) had T. marneffei respiratory system infections; 38.1% (24/63) were misdiagnosed as having tuberculosis. Human immunodeficiency virus (HIV) infection, CD4/CD8 < 0.5, percentage of CD4 T cells <42.8%, and length of time from onset to confirmation of diagnosis >105 days were potential risk factors for poor prognoses. Length of time from onset to confirmation of diagnosis persisted as an independent predictor of all-cause mortality in multivariate analysis (odds ratio: 0.083, 95.0% confidence interval: 0.021-0.326, P < 0.001). However, the size of the lung lesions, dyspnea, thoracalgia, mediastinal lymphadenopathy, and pleural effusion did not significantly predict overall survival. There was no significant difference in prognosis according to the type of treatment. CONCLUSIONS: T. marneffei infections involving the respiratory system are common. The critical determinants of prognosis are HIV infection, CD4/CD8, percentage of CD4 T cells, type of treatment, and the time range from onset to confirmation of diagnosis. Rapid and accurate diagnosis is crucial for improving prognosis.

Sistema Respiratório/microbiologia , Talaromyces/patogenicidade , Adolescente , Adulto , Idoso , Antifúngicos/uso terapêutico , Criança , Pré-Escolar , Feminino , Humanos , Lactente , Masculino , Pessoa de Meia-Idade , Micoses/tratamento farmacológico , Micoses/microbiologia , Micoses/patologia , Prognóstico , Estudos Retrospectivos , Talaromyces/efeitos dos fármacos , Adulto Jovem