In this report, we have analyzed the human T cell repertoire derived in vivo from a single T cell precursor. A unique case of X-linked severe combined immunodeficiency in which a reverse mutation occurred in an early T cell precursor was analyzed to this end. It was determined that at least 1,000 T cell clones with unique T cell receptor-beta sequences were generated from this precursor. This d...

primary immunodeficiencies (pid) are a group of disorders, characterized by an unusual susceptibility to infections. delay in diagnosis results in increased morbidity and mortality in affected patients. the purpose of this study was to determine the mortality rate of iranian immunodeficient patients referred to children medical center hospital affiliated to tehran university of medical sciences...

Lymphocytes residing in the intestinal epithelium are exclusively T cells and account for one of the largest collection of T cells in the organism. However, their function remains obscure. We and others have shown that the development of intestinal intraepithelial T cells is compromised in mutant mice prone to chronic intestinal inflammation. These results led us to directly assess their role i...

Infection with multiple ganciclovir-resistant human cytomegalovirus mutants, containing different substitutions and deletions in the UL97 gene, was found in a patient with severe combined immunodeficiency (SCID) within 3 weeks of ganciclovir therapy. A novel 11-codon deletion at positions 590 to 600 was identified. These unique findings may be related to the nature of the immunodeficiency in th...

Unfortunately, we do not know how many perinatally (Human Immunodeficiency Virus) HIV-infected pepole are living in contries today, while knowing these informations is necessary. UNAIDS reports that there are 3.4 million children under 15 years of age with HIV and 2 million adolescents between 10 and 19 years of age. Although the vast majority of children were perinatally infected, older childr...

Severe Combined Immunodeficiency (SCID) is a disease with a genetic background in Arabian horses and crossbreeds with Arabians. The disease has been known and documented since the 1970’s and was early suggested to have an autosomal recessive mode of inheritance. Foals that are affected with SCID lack production of both B and T lymphocytes and consequently die from secondary diseases within a sh...