Simona Ozden

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An unprecedented epidemic of chikungunya virus (CHIKV) infection recently started in countries of the Indian Ocean area, causing an acute and painful syndrome with strong fever, asthenia, skin rash, polyarthritis, and lethal cases of encephalitis. The basis for chikungunya disease and the tropism of CHIKV remain unknown. Here, we describe the replication(More)
Human T-cell leukemia virus type 1 (HTLV-1) is associated with a variety of clinical manifestations, including tropical spastic paraparesis or HTLV-1-associated myelopathy (TSP/HAM). Viral detection in the central nervous system (CNS) of TSP/HAM patients demonstrates the ability of HTLV-1 to cross the blood-brain barrier (BBB). To investigate viral entry(More)
The blood-brain barrier (BBB), which constitutes the interface between blood and cerebral parenchyma, has been shown to be disrupted during retroviral associated neuromyelopathies. Human T cell leukemia virus (HTLV-1)-associated myelopathy/tropical spastic paraparesis is a slowly progressive neurodegenerative disease, in which evidence of BBB breakdown has(More)
Sporadic inclusion body myositis is a disease of unknown pathogenesis in which a viral etiology has long been suspected. We report a case that occurred in a patient with human T cell leukemia virus type 1-associated myelopathy. The diagnosis was confirmed by histopathological studies of the deltoid muscle. Nucleic acids amplification and in situ(More)
Chikungunya virus (CHIKV) is a mosquito-transmitted Alphavirus that causes in humans an acute infection characterized by polyarthralgia, fever, myalgia, and headache. Since 2005 this virus has been responsible for an epidemic outbreak of unprecedented magnitude. By analogy with other alphaviruses, it is thought that cellular proteases are able to process(More)
Human T-cell leukemia/lymphoma virus type 1 (HTLV-1) infection can lead to the development of HTLV-1-associated myelopathy/tropical spastic paraparesis (HAM/TSP), concomitantly with or without other inflammatory disorders such as myositis. These pathologies are considered immune-mediated diseases, and it is assumed that migration within tissues of both(More)
SJL/J mice inoculated intracranially with the DA strain of Theiler's virus exhibit a persistent demyelinating disease of the central nervous system. To investigate the effect of persistent infection of oligodendrocytes on the expression of myelin genes, we analyzed the level of PLP mRNA in infected as well as uninfected oligodendrocytes. This study was(More)
The blood-brain barrier (BBB), which forms the interface between the blood and the cerebral parenchyma, has been shown to be disrupted during retroviral-associated neuromyelopathies. Human T Lymphotropic Virus (HTLV-1) Associated Myelopathy/Tropical Spastic Paraparesis (HAM/TSP) is a slowly progressive neurodegenerative disease associated with BBB(More)
Human T-cell leukemia virus type 1 (HTLV-1) is the causative agent of adult T-cell leukemia/lymphoma and HTLV-1-associated myelopathy/tropical spastic paraparesis. In addition to blood transfusion and sexual transmission, HTLV-1 is transmitted mainly through prolonged breastfeeding, and such infection represents a major risk for the development of adult(More)
We used 35S-labeled and biotinylated cRNAs (riboprobes) to detect simultaneously two different mRNAs by in situ hybridization. In a first step we established the conditions under which each type of probe achieved the same high level of sensitivity. We then used these conditions to hybridize BHK cells infected with Theiler's virus, a murine picornavirus,(More)