Gene/Protein Disease Symptom Drug Enzyme Compound
Pivot Concepts:   Target Concepts:
Query: UMLS:C0024312 (lymphopenia)
 4,859 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Destruction of peripheral lymphocytes and detrimental alterations in hematopoietic precursors are associated with influenza virus infection in birds and humans. A prominent feature among H5N1 influenza-virus-infected patients with a severe or fatal outcome was found to be lymphopenia and reactive hemophagocytosis. We show here that NS1 protein from human H5N1 influenza isolate A/HK/156/97 reduces both systemic and pulmonary pro-inflammatory cytokines in an in vivo mouse model and protects against bone marrow lymphocyte depletion, an effect which has been shown to be mediated by TNFalpha. These data suggest that the outcome of disease-associated lymphohematopoietic pathogenesis with a pathogenic influenza A virus may depend on the balance between the virus-replication-induced generation of pro-inflammatory cytokines which are a crucial component of the host's anti-viral defense and the ability of the NS1 protein, with or without the interaction of other virus proteins, to counteract such cytokine-mediated adverse effects.
 ...
PMID:Influenza virus NS1 protein protects against lymphohematopoietic pathogenesis in an in vivo mouse model. 1654 18

Tonate virus (TONV) is an arbovirus discovered in 1973 in French Guiana (FG) belonging to the Venezuelan equine encephalitis virus complex, Alphavirus genus. Only few publications and cases have been reported in FG. The objectives of the present study were to describe the clinical picture of TONV and to compare its presentation with that of dengue virus (DENV). A retrospective study was performed in Cayenne hospital from 2003 to 2016 including all patients exclusively positive for TONV IgM and not for other alphaviruses. They were classified as high probability: typical clinical picture of arbovirus infection (i.e., fever, chills, headaches, muscle, and joint pains) and IgM seroconversion; medium probability: typical clinical picture + single positive IgM on a unique serum sample without control; and low probability: atypical clinical picture of infection and single positive IgM. Only patients with high and medium probability were included in the analysis and compared with a gender- and age-matched control group of DENV diagnosed by NS1 antigen (two controls per case). During the study period, 45 cases of TONV were included and compared with 90 cases of DENV. Twenty-eight (62.2%) were men; the median age was 34 years (IQ [22-49]). In the bivariate analysis, variables significantly associated with TONV versus DENV were the presence of cough (33.3% versus 10.3%) and anemia (32.5% versus 11.1%) and the absence of nausea (4.4% versus 32.2%), rash (2.2% versus 27.4%), fatigue (17.8% versus 41.0%), anorexia (6.7% versus 30.1%), muscle pain (42.2% versus 61.4%), headache (53.3% versus 70.8%), leukopenia (9.8% versus 44.4), and lymphopenia (42.5% versus 89.9%). There were no cases with severe neurological involvement, and there were no deaths. Tonate virus may be evoked as a cause of fever in patients living or returning from the Amazonian area. Positive TONV IgM does not prove the diagnosis and should not preclude from searching for alternative infectious diagnoses.
 ...
PMID:Discriminating Tonate Virus from Dengue Virus Infection: A Matched Case-Control Study in French Guiana, 2003-2016. 3176 1