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Biomedical subjects

B Dupont

Publications and source records attributed to B Dupont.

At least 469 records · Page 26Linked to original sources
PubMed1977

Reconstitution in severe combined immunodeficiency by transplantation of marrow from an unrelated donor.

A patient with severe combined immunodeficiency received seven transplants of bone marrow from an HLA-B-compatible and HLA-D-compatible unrelated donor in an attempt to provide immunologic reconstitution. The first four transplants achieved restricted engraftment with evidence of rudimentary immunologic function. A fifth transplant, given after low-dose cyclophosphamide, produced reconstituion of cell-mediated immunity. Marrow aplasia developed after recontamination with a nonpathogenic microflora. Transplantation of marrow previously stored in liquid nitrogen was ineffective. A subsequent transplant, administered after high-dose cyclophosphamide, achieved durable engraftment, with complete hematopoietic and immunologic reconstitution. Seventeen months after transplantation, full functional engraftment persists. Graft-versus-host disease has been chronic and moderately severe, but limited to the skin and oral mucosa. Transplantation of marrow from unrelated histocompatible donors may provide a useful treatment for patients with severe combined immunodeficiency or aplastic anemia who lack a matched sibling or related donor.

Bone Marrow Transplantation↗
PubMed1977

[Subacute bacterial endocarditis due to lactobacillus (author's transl)].

The case described is one of endocarditis due to lactobacillus casei in a 33-year-old man with aortic insufficiency of undetermined origin. The clinical signs were neurological, following thrombosis of the right posterior cerebral artery. The source of injection was a dental extraction. This case, with a typical clinical picture, is the eleventh to be reported in the literature.

Adult↗
PubMed1977

Linkage between the gene (or genes) controlling synthesis of the fourth component of complement and the major histocompatibility complex.

In an attempt to map the gene (or genes) controlling the synthesis fo the fourth component of complement (C4), we performed linkage studies in a family with hereditary C4 deficiency. The proband, a seven-year-old boy with lupus erythematosus, consistently lacked deteftable serum C4 by both functional and protein measurements. The complement defect was transmitted as an autosomal recessive disorder. Eight of 15 family members were considered to be heterozygotes, seven because of low C4 levels and one because of genetic data (obligate heterozygote). The gene (or genes) coding for C4 deficiency appeared to be linked to the major histocompatibility complex (A2,B12,DW2 on the maternal side and A2,BW15,LD108 on the paternal side) and to other markers known to be in close proximity to the histocompatibility complex on chromosome 6 (phosphoglucomutase-3, glyoxalase-1 and properdin factor B).

Child, Preschool↗
PubMed1977

HLA-D compatibility between parent and child: increased occurrence in severe combined immunodeficiency and other hematopoietic diseases.

Weak or weak intermediate reactions in one-way mixed lymphocyte culture (MLC) were seen between a patient and at least one parent in the families of 6 of 15 patients with severe combined immunodeficiency disease, 3 of 4 patients with Fanconi's anemia, and 3 of 7 patients with congenital neutropenia (CN). In control family material, weak MLC reactions were seen in 1.4 per cent (4 of 285) of individual parent-child and child-parent combinations or in 2.1 per cent (3 of 143) of the total number of parent-child pairs. The increase in frequency of weak MLC reactions seen in the familes of patients with severe combined immunodeficiency disease and Fanconi's anemia occurred most frequently between mother and patient. This finding could be relevant to the pathogenesis of these diseases. In children with CN, the disease seems to be associated with the HLA antigen B12; in addition, two of the patients with CN appear to be homozygous for HLA-D. Because of the relatively frequent compatibility seen in MLC reactions between parents and children with severe combined immunodeficiency disease, Fanconi's anemia, and CN, it is suggested that those parents could be potential donors for bone marrow transplantation.

Adult↗
PubMed1977

Lymphocyte chimerism after bone marrow transplantation. Surface markers and in vitro function of donor and recipient lymphocyte subpopulations.

Specific HLA antibodies were used to eliminate donor and recipient cells, respectively, from lymphocyte suspensions prepared from the blood of a child who had been transplanted with bone marrow from an HLA-A- and HLA-B-incompatible, HLA-D-compatible donor. About 70% of the lymphocytes were of donor HLA type, the remaining of recipient type. The phytohemagglutinin-responsive lymphocytes were exclusively limited to the lymphocyte population carrying donor-type HLA antigens. Membrane immunofluorescence investigations of the donor and recipient populations showed a low percentage of IgM-positive lymphocytes in the donor population and an extremely high proportion of IgM-positive lymphocytes in the recipient population. About 90% of the donor lymphocytes were T cells, as judged by their capacity to form rosettes between sheep erythrocytes and T lymphocytes; no cells in the recipient cell population expressed this ability.

B-Lymphocytes↗
PubMed1977

Human immunodeficiency disease: impairment of cellular interactions leading to abnormal mediator production in mixed lymphocyte culture reaction.

Leukocyte migration inhibitory factor (LMIF) production in mixed lymphocyte culture (MLC) reactions is the result of cellular interactions based on two separate phenomena: the capacity of lymphocytes to stimulate in MLC, and the capacity of lymphocytes to respond in MLC. Puromycin-treated lymphocytes are capable of stimulating allogeneic cells for LMIF production, but are unable to respond with synthesis of LMIF (one-way MLC-LMIF test). We have studied the stimulating and responding capacity of lymphocytes from patients with different immunodeficiency syndromes in a one-way MLC-LMIF assay. Lymphocytes from patients known to have qualitative and quantitative defects of T cell or B cell functions (Hodgkin's disease, mycosis fungoides, thymoma, chronic lymphatic leukemia) were found to respond poorly as measured by mediator production although their stimulating fuction was frequently retained. Patients with advanced solid tumors often had both MLC-stimulating and responding functions depressed. There was no apparent correlation between mitogen response and MLC-induced LMIF responses or between MLC proliferative response (as measured by thymidine incorporation) and mediator production. Studying of stimulatory and responding capacity of lymphocytes in the MLC-LMIF assay provides a new tool for assessing immunocompetence and allows for in vitro evaluation of cellular interactions that may play an important role in vivo.

Candidiasis, Cutaneous↗
PubMed1977

HLA and MLC typing in patients with Hodgkin's disease.

HLA typing for 27 A and B locus antigens was performed in 137 Caucasian patients with Hodgkin's disease. A and B locus antigen frequencies were compared for the entire group of patients, for 51 patients studied in a prospective manner and for 62 patients surviving with Hodgkin's disease for more than 5 years. MLC typing (HLA-D) was performed in 51 unselected Caucasian patients using 6 differend HLA-D homozygous test cells which define 3 HLA-D specificity groups (DW2, DW3, and DW4). HLA-AW33 was found in 0.0% of patients and in 5.9% of random Caucasian blood donors at the Sloan--Kettering Institute (X2 equals 7.04, p less than 0.01). HLA-A1 was found to be increased to 35.8% in the entire patient group (N = 137) as compared to 25.4% in 855 random North American Caucasians (X2 = 5.97, p less than 0.02). There was no significant deviation of any A or B locus antigen in relation to sex, histology, age of patient, or duration of survival (newly diagnosed vs 5-year survivors). No significant deviation for either of the 3 common HLA-D determinants (DW2, DW3, or DW4) was observed.

Adult↗
PubMed1977

In vitro lymphocyte transformation of MS patients to paramyxovirus antigens.

The immune response of 21 MS patients and 21 healthy volunteers was tested in vitro lymphocyte transformation assay. The stimulating antigens were measles, mumps, parainfluenza, E. coli, S. aureus and C. albicans. MS patients were found to respond similarly to the normal controls to all antigens tested with the exception of mumps antigen. The maximum responses of the MS patients to this antigen were significantly lower than those observed for the normals. However, since 95 per cent of the MS lower maximum responses were still within the positive range, the immunological significance of this phenomenon will require further clarification.

Antigens, Viral↗
PubMed1977

Ecotaxis: the principle and its application to the study of Hodgkin's disease.

A study of the function, characterization and distribution of T and B lymphocytes in five children with Hodgkin's disease is presented. The results, indicating that lymphocyte depletion in the peripheral blood does not necessarily reflect an overall lack of circulating lymphocytes, are presented to demonstrate that failure of ecotaxis (normal lymphocyte migration and distribution) can occur in man. The underlying reasons for such failure and their relevance to the pathogenesis of Hodgkin's disease are discussed.

Adolescent↗
PubMed1977

HLA and disease.

Explore the source record for details and available documents.

B-Lymphocytes↗
PubMed1977

Depressed in vitro lymphocyte responses to PHA in patients with Hodgkin disease in continuous long remissions.

Twenty consecutive patients with Hodgkin disease in continuous complete remission and off treatment for at least 5 yr (range 5-25 yr, median 9 yr) were studied with a battery of immunologic parameters. Skin test reactivity to four common antigens, sensitization to 2,4-dinitrochlorobenzene, absolute lymphocyte count, relative percentage of T cells (as measured by spontaneous rosette formation with sheep erythrocytes) and B cells (as measured by immunofluorescence with polyvalent antiserum), and absolute number of T and B cells were normal when compared with controls. However, the mean value of lymphocyte response in vitro to the mitogen phytohemagglutinin for the study population was significantly decreased (p less than 0.001) when compared with the controls. This abnormality in response to mitogen could not be correlated with age, sex, stage, symptoms, histologic subclassification, or previous treatment. The data suggest the existence of a persisting cell-mediated immune defect in the circulating lymphocytes in patients with long-standing Hodgkin disease that might otherwise be considered "cured."

Antigens↗