Takatoshi Inoue

Selective partial IgM deficiency:functional assessment of T and B lymphocytes in vitro

Seven patients with selective IgM deficiency (SIgMD) were studied for cell surface immunoglobulin (SmIg), T-cell subpopulations, and immunoglobulin (Ig) synthesisin vitro by peripheral blood lymphocytes (PBL). Serum IgM levels were less than 25 mg/dl, while IgA, IgG, and IgD were within normal levels. The patients had respiratory or urinary tract infections and two were diagnosed as having systemic lupus erythematosus (SLE). T/B-cell ratios in PBL were within normal ranges. Percentage ratios of B cells bearing SmIg were normal in five patients and decreased in two; however, normal values were seen after 7 days of culture in the presence of PWM. OKT4/OKT8 ratios decreased in five of seven patients, in whom two were due to a decrease in OKT4 and two to an increase in OKT8 cells. One showed a decrease in OKT4 and an increase in OKT8. Analysis of lymphocyte function for Ig synthesisin vitro, using a coculture of counterpart T and B cells from healthy individuals and patients with SIgMD, revealed that the increased function of IgM isospecific suppressor T cells (Ts) was responsible for the IgM deficiency in all seven patients.

Selective IgA Deficiency: Analysis of Ig Production in Vitro

The cellular basis of the pathogenesis of selective IgA deficiency (SIgAD) was investigated by examining surface immunoglobulin (SmIg) andin vitro pokeweed mitogen (PWM)-stimulated immunoglobulin (Ig) synthesis and by assaying in combination the counterpart lymphocytes from individuals with SIgAD and healthy donors. Peripheral blood lymphocytes (PBL) from 14 individuals with SIgAD synthesized normal amounts of IgG and IgM but did not synthesize normal amounts of IgA. Functional defects of lymphocytes for IgA synthesis were classified into four types: (i) B-lymphocyte dysfunction, (ii) increased function of suppressor T lymphocytes (Ts), (iii) decreased function of helper T lymphocytes (Th), and (iv) B-lymphocyte dysfunction and increased Ts function. The cells bearing SmIgG, SmIgM, and SmIgD were demonstrated at normal percentage ratios in all cases by immunofluorescent staining. The cells bearing SmIgA were at normal percentage ratios in the cases of T-lymphocyte dysfunction, while in the cases of B-lymphocyte defect SmIgA-bearing cells were reduced.

Alpha1-antitrypsin synthesis by human lymphocytes

Abstract De novo synthesis of alpha1-antitrypsin (α1AT) by human peripheral lymphocytes has been demonstrated in the present study. Treatment of the mononuclear cells with concanavalin A(Con A) resulted in a triple increase in the amount of α1AT synthesized by the untreated cells. A small amount of α1AT, equivalent to that synthesized by the unstimulated mononuclear cells, was observed in cultures of monocyte-depleted lymphocytes, with or without Con A stimulation. Monocytes treated with or without Con A scarcely synthesized α1AT. Conditioned media derived from monocyte enriched mononuclear cells treated with Con A enhanced about threefold α1AT synthesis by the Con A-stimulated lymphocytes. α1AT is suggested to be synthesized by lymphocytes assisted by monocytes.

Development of DTH Skin Reaction to HBsAg in Individuals Immunized with HB Vaccine

To examine the temporal relationship between the DTH skin reaction to HBsAg and antibody response to HBsAg, serial skin tests for HBsAg were carried out on seven individuals immunized with HB vaccine.

Development of Skin Reaction to Hepatitis B Vaccines in Man

Although there have been many reports concerning immunological responses in type B viral hepatitis, the role of cell-mediated immunity in the pathogenesis of hepatitis B virus (HBV) infection remains uncertain. The presence of cellmediated immunity to hepatitis B surface antigen (HBsAg) has been demonstrated by lymphocyte transformation assay and the migration inhibition test (2-4). Nevertheless, no delayed type hypersensitivity (DTH) skin reaction has been re

A case with Budd-Chiari syndrome associated with pregnancy.

症例は34歳女性.妊娠32週で性器出血し,部分前置胎盤早期剥離の診断で帝王切開を受けた.術後急速に大量の腹水貯留を来し,利尿剤に抵抗性であった.腹水の性状は滲出性であり,腹腔鏡肝生検で肝うつ血の所見が認められた.下大静脈造影で下大静脈の総腸骨静脈からの入口部より肝静脈流入部までの閉塞が証明され,下大静脈閉塞を伴う,Budd-Chiari症候群と診断された.妊産婦は,凝固因子の増加,線溶能の低下,血小板粘着能の上昇など血栓を形成しやすい状態にある.本例は,部分前置胎盤早期剥離と帝王切開に伴い,組織トロンボプラスチンが血中へ大量流入し,急速に血栓が形成されたものと推定された.妊娠を契機に発症したBudd-Chiari症候群は1980年までに約30例が報告されているが,本邦では,初めての報告である.