In the recent past, the gene therapy field has witnessed a remarkable series of successes, many of which have involved primary immunodeficiency diseases, such as X-linked severe combined immunodeficiency, adenosine deaminase deficiency, chronic granulomatous disease, and Wiskott-Aldrich syndrome. While such progress has widened the choice of therapeutic options in some specific cases of primary...

Purine nucleoside phosphorylase (PNP) deficiency is associated with a severe defect in thymus-derived (T)-lymphocyte function combined with normal bone marrow-derived (B)-lymphocyte function. To investigate the role of this enzyme deficiency in the resulting immune dysfunction, we measured the levels of ribonucleoside and deoxyribonucleoside triphosphates in erythrocytes from two unrelated PNP-...

Adenosine deaminase (ADA) deficiency is best known as a form of severe combined immunodeficiency (SCID) that results from mutations in the gene encoding ADA. Affected patients present with clinical and immunological manifestations typical of a SCID. Therapies are currently available that can target these immunological disturbances and treated patients show varying degrees of clinical improvemen...

The adapter protein linker for activation of T cells (LAT) is a critical signaling hub connecting T cell antigen receptor triggering to downstream T cell responses. In this study, we describe the first kindred with defective LAT signaling caused by a homozygous mutation in exon 5, leading to a premature stop codon deleting most of the cytoplasmic tail of LAT, including the critical tyrosine res...

Approximately 20 years ago, gene therapy was first introduced when Michael Blaese and colleagues applied ex vivo modified autologous T cells to children suffering from adenosine deaminase deficiency (ADA-SCID), a Mendelian genetic error that causes severe combined immunodeficiency syndrome (Blaese et al, 1995). The investigators used retroviral vectors; the most advanced gene delivery system at...

The occurrence of a deficiency of adenosine deaminase (ADA) activity in some patients with severe combined immunodeficiency suggests a possible relationship between the activity of ADA and the aberration of the immune system. To help delineate the function of ADA in the immune response we have examined its role in monocyte maturation. When incubated in vitro, peripheral blood monocytes transfor...

To determine if in utero transplantation could restore the immune system of mice with a severe combined immunodeficiency (SCID) disorder, C57BL/6Sz-scid/scid fetuses were injected on day 14/15 of gestation with adult congenic donor bone marrow (BM) cells. Congenic BM engrafted in one of eight (13%) recipients. Reconstitution of both lymphoid and nonlymphoid lineages was observed. In vitro and i...

Severe combined immunodeficient (SCID) mice injected intravenously with a human Burkitt’s lymphoma cell line (Daudi) develop disseminated lymphoma (SCID/Daudi), which is fatal in 100% of the mice. Early treatment of these mice with either an immunotoxin (IT) cocktail (consisting of anti-CD19-ricin A chain plus anti-CD=-ricin A chain) or chemotherapy significantly prolonged survival but w...

Severe combined immunodeficient (SCID) mice injected intravenously with a human Burkitt’s lymphoma cell line (Daudi) develop disseminated lymphoma (SCID/Daudi), which is fatal in 100% of the mice. Early treatment of these mice with either an immunotoxin (IT) cocktail (consisting of anti-CD19-ricin A chain plus anti-CD=-ricin A chain) or chemotherapy significantly prolonged survival but w...

Abstract World Health Organisation recommends the practice of BCG vaccination at birth in countries which have a high incidence tuberculosis and/or leprosy burden. The is considered safe for competent immune system. However, children with weakened systems cause can be primary or secondary, vaccine may lead to side effects localized disseminated. In this study, we report spectrum inborn errors i...