Human T-cell lymphotropic virus type 1 (HTLV-1), causes adult T cell leukemia/lymphoma (ATLL), and initiates a variety of immune mediated disorders. The viral genome encodes common structural and enzymatic proteins characteristic of all retroviruses and utilizes alternative splicing and alternate codon usage to make several regulatory and accessory proteins encoded in the pX region (pX ORF I to...

Modifications in donor screening and the introduction of laboratory testing of donated blood for anti-HIV-1 and anti-HTLV-I have resulted in a significant reduction in the risks of retroviral infections from blood transfusion. Presently, the American Red Cross detects an average of eight carriers of human immunodeficiency virus, type 1 (HIV-1) per 100,000 otherwise acceptable blood donors (0.00...

Using sera from hosts infected with bovine leukaemia virus (BLV), human T cell lymphoma virus types I and II (HTLV-I and -II), or simian T cell lymphoma virus type I (STLV-I), we found that the major gag proteins of these viruses cross-react immunologically. The specificity of this cross-reactivity was demonstrated by absorption using purified viral proteins, virus lysates and extracts of infec...

The function of untranslated (UT) nucleotide sequences in the proximal portion of the pX region of the human T-cell leukemia virus (HTLV) family of retroviruses remains enigmatic. Previous studies have shown that these sequences are not necessary for the expression of viral proteins or for the induction, transmission, or maintenance of the transformed cell type in vitro. To determine the effect...

Recombinant retroviruses containing the trans activator genes of human T-cell leukemia virus (HTLV) type II and human T-cell lymphotropic virus type III were constructed. The trans activator genes tat II and tat III were inserted into the murine retroviral vector pZIPNEOSV(X)1. Recombinant plasmids were transfected into the psi 2 and psi AM packaging cell lines that produce murine leukemia viri...

HTLV-II has been found in some cases of the rare T-cell form of hairy-cell leukemia (HCL) and in a leukopenic chronic T-cell leukemia mimicking HCL. We asked whether the virus is implicated in the more frequent B-cell form of HCL. DNA extracted from the mononuclear cells derived from spleen (eight cases) or peripheral blood (eight cases) of 16 patients with the B-cell form of HCL was probed. No...

Prurigo nodularis is a pruritic dermatosis of unknown origin. Human T-cell lymphotropic virus type 1 (HTLV-1) causes adult T-cell leukaemia/lymphoma. HTLV-1 is not considered to be a cause of prurigo nodularis. A 52-year-old black man, from the French West Indies, who had had prurigo nodularis for 12 years, presented with a distinct micropapular eruption with the typical pathological picture of...

Infections with human retroviruses, others than the HIV virus, are not very well known in Romania, despite the fact that screenings for HTLV I and II are constantly performed in blood donation centers. The authors draw attention on the possible severe consequences that may occur in chronic infections with these viruses by presenting the case of a 35 year-old male, who was known to be infected w...

Abstract Backgrounds Therefore, reports on the risk of HTLV-1-related diseases in organ transplantation have increased recent years, and management HTLV renal remains a challenge. Patients methods We retrospectively analyzed four HTLV-1-positive recipients or donors among 89 cases from 2006 to 2021. Results Among recipients, two patients developed adult T cell leukemia/lymphoma (ATL) derived at...