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Biomedical subjects

T Wiebe

Publications and source records attributed to T Wiebe.

At least 55 records · Page 3Linked to original sources
PubMed1988

Lymphocyte subpopulations and lymphokine production in children with constitutional aplastic anemia.

The expression of lymphocyte surface markers as well as the production of interleukin-2 (IL-2) and interferon-gamma (IFN) by mitogen-stimulated peripheral blood mononuclear cells (MNC) have been studied in five children with constitutional aplastic anemia. A significantly reduced T4/T8 ratio was found and two of five patients also had a reduced percentage of B cells. One patient had a high percentage of HLA-DR positive T8+ cells, very suggestive of a high degree of circulating activated T suppressor/cytotoxic cells. IL-2 production was reduced in two patients, whereas IFN production was only reduced in one of these. The abnormalities found correlate with the duration of the bone marrow failure. The patients with the longest duration of bone marrow failure also exhibited the lowest T4/T8 ratio. No spontaneous IFN production was detected in any of the patients. There was no clinical benefit or reversal of the immune abnormalities during and following treatment with cimetidine and cyclosporine A in two patients.

Anemia, Aplastic↗
PubMed1987

A new specific chromosomal rearrangement, t(8;16) (p11;p13), in acute monocytic leukaemia.

The translocation t(8;16) (p11;p13) was found as the sole deviation from the normal karyotype in three patients with acute monocytic leukaemia. The bone marrow morphology was strikingly similar in the two cases where smears were available for re-evaluation: the leukaemic cells showed signs of differentiation, and active erythrophagocytosis was a particularly conspicuous feature. We suggest that t(8;16) (p11;p13) represents a new consistent abnormality in acute monocytic leukaemia, specifically associated with the differentiated subtype (M5b) and with pronounced phagocytic activity by the leukaemic monocytes.

Adolescent↗
PubMed1987

Arterial occlusion due to Listeria meningoencephalitis in an immunocompromised boy.

Sequential CAT scan studies of the brain were performed in a 7-year-old boy with Listeria monocytogenes serotype 1 meningoencephalitis. The infection occurred while he was receiving maintenance chemotherapy for T-cell non-Hodgkin lymphoma. A lesion in the right hemisphere during the infection resulted in an excessive enlargement of the right ventricle 10 months later, most probably caused by arterial occlusion.

Arterial Occlusive Diseases↗
PubMed1987

Disturbed pubertal growth in girls treated for acute lymphoblastic leukemia.

Pubertal growth was studied in 10 girls previously treated for acute lymphoblastic leukemia. The average age at menarche was 12.2 years, which is significantly lower (p less than 0.01) than the expected 13.1 years. Compared with normal girls, these girls showed a subnormal (p less than 0.05) peak height velocity during the second year before menarche. The remaining growth before menarche as well as the total postmenarchal growth was close to the normal average. The average final standing height was 1 SD less than what would be expected from their height 1 year after the cessation of therapy. A relative growth hormone deficiency in combination with early onset of puberty could account for this loss in final height.

Adolescent↗
PubMed1987

New structural chromosomal rearrangements in congenital leukemia.

The karyotypic abnormalities and clinical data on three patients in whom acute leukemia was diagnosed within the first 6 months of life are presented. The four structural chromosomal rearrangements detected in the bone marrow from these patients, i.e., t(7;12)(q36;p13) and t(1;19)(q11;q11) in case 1, t(2;10;11;12)(q21q31;p13;q13;q24) in case 2, and t(11;19)(q23;p13) in case 3, have not previously been associated with congenital leukemia. Acquired chromosomal changes have until now been reported in only 31 leukemic infants in this age group. Of the total material, 18 patients had acute lymphoblastic leukemia and 16 had acute nonlymphocytic leukemia. The by far most frequently recorded cytogenetic aberration has been t(4q;11q), seen in 14 cases of lymphoblastic leukemia. Although t(4q;11q) has not been found in a single patient with acute nonlymphocytic leukemia, these leukemias have often had other rearrangements involving the same region of 11q. Hence, genetic material around 4q21 may be active in lymphocytic differentiation, whereas gene(s) in 11q23 may be important in the neoplastic process in a less cell-type specific manner and perhaps particularly vulnerable to neoplastic rearrangement in fetal life. The finding of four cases out of 34 with translocations between 11q23 and chromosome 19 indicates that this rearrangement might characterize a specific cytogenetic subgroup of leukemia in the very young.

Acute Disease↗
PubMed1986

High resolution banding analysis of the reciprocal translocation t(6;9) in acute nonlymphocytic leukemia.

The cytogenetic, hematologic, and clinical characteristics of a 13-year-old girl with acquired t(6;9)(p23;q34) and dysmyelopoietic syndrome developing into acute myelomonocytic leukemia are described, bringing the total number of patients with t(6;9) and hematologic disease described in the literature up to 19. The diagnosis has been acute myeloid leukemia in the great majority of these patients; only four have had acute myelomonocytic leukemia. High resolution analysis at the 550 band stage localized the breakpoints in chromosomes #6 and #9 to p23 and 9q34.3, respectively. Previous investigations employing high resolution cytogenetics have mapped the typical 9q breakage site in chronic myeloid leukemia to 9q34.1. In situ hybridization studies have demonstrated that the cellular oncogene c-abl remains on the derivative 9q+ chromosome in t(6;9), whereas it is moved to the Ph marker in t(9;22). Thus, the combined data indicate that c-abl is located between 9q34.1 and 9q34.3, i.e., in subband 9q34.2 or its immediate vicinity.

Acute Disease↗
PubMed1986

Reciprocal translocation (11;19)(q23;p13) in congenital acute lymphoblastic leukemia.

The cytogenetic, clinical, and immunologic findings ina 4-month-old girl with acute lymphoblastic leukemia (ALL) are reported. The malignant lymphoblasts were characterized cytogenetically by the reciprocal translocation t(11;19)(q23;p13); immunologically by an immature pre-B-ALL phenotype. In spite of the high-risk nature of the leukemia, the patient attained complete remission relatively quickly and is still free of disease 3 years after diagnosis. Because the only two previously reported ALL patients with t(11;19) also seem to have responded well to therapy, this cytogenetic abnormality might turn out to be an indicator of favorable prognosis in ALL.

Chromosome Banding↗
PubMed1986

[Pulmonary and pleural metastases in malignant melanoma].

Clinical reports on first metastases of a malignant melanoma in lung or pleura or of such metastases which are observed before detection of the primary tumor are relatively rare. That is especially typical for metastases of intraocular melanomas. In the time from 1970 till 1984 we have observed in our hospital five cases of pulmonary or pleural metastases of malignant melanomas. We demonstrate a summary of these including two case reports. Differential diagnostic aspects and conclusions from the pulmological view for the follow-up of patients with melanomas are also given.

Aged↗
PubMed1985

Transfer of IgA deficiency to a bone-marrow-grafted patient with aplastic anaemia.

IgA deficiency developed in a 2-year-old boy with aplastic anaemia who received a bone-marrow graft from his HLA-identical, 6-year-old, IgA-deficient sister. Southern blot analysis revealed the presence of alpha-genes in both children, thus suggesting a defect of lymphocyte stem-cell differentiation as a cause of IgA deficiency. Tissue typing showed homozygosity of HLA A1, B8, DR3, the haplotype associated with IgA deficiency in healthy people. Despite normal serum levels of IgG subclasses in both donor and recipient, both children showed a relative lack of specific IgG2 anticarbohydrate antibodies. This suggests that their IgA deficiency is part of a more fundamental aberration of immunoglobulin class and subclass distribution.

Anemia, Aplastic↗
PubMed1984

Fulminating clostridial septicemia in children treated for lymphoproliferative disorders.

Overwhelming Clostridium septicum infection in 2 children, 1 and 4 yr old, with acute lymphoblastic leukemia and B-cell non-Hodgkin malignant lymphoma, respectively, as well as fatal C. perfringens infection in a 3-yr-old child with histiocytosis-X are reported. A neutropenic patient with fever, abdominal symptoms and hypotension--but otherwise being well--must be suspected of having clostridial disease. The most alarming feature is shock and rapid course.

Child↗
PubMed1983

Bcg vaccination as a cause of multifocal osteomyelitis in a 12-year-old girl.

A 12-year-old girl with multifocal skeletal sclerosis has been investigated. She was BCG vaccinated at birth and developed regional lymphadenitis in her left groin at two months of age. She was healthy until approximately 10 years of age, after which deficient height and weight gain occurred. BCG-itis was diagnosed in skeleton lesions. No evidence of immunodeficiency was found in the patient. After antituberculous treatment, the skeleton lesions, previously seen at bone scan, had disappeared. There has been a dramatic effect on her weight gain, growth and general well-being.

BCG Vaccine↗
PubMed1977

Alterations of lipid metabolism in healthy volunteers during long-term ethanol intake.

Nine young, healthy male volunteers were given ethanol (75 g/day) for 5 weeks. The ethanol was divided into five daily doses and taken so that blood ethanol levels never exceeded 0.04% (w/v). During the latter part of the ethanol intake period, there was a significant, transient increase of plasma triglyceride (TG) concentrations followed by reduction to normal levels. A three-fold increase of lipoprotein lipase activity (LLA) occurred in biopsy specimens of adipose tissue. An increase of alpha-lipoprotein concentrations, which correlated significantly with the decrease in plasma TG levels and the increase in adipose LLA, was also observed during the ethanol intake period. No changes were observed in plasma cholesterol and beta-lipoprotein levels. A transient, three-fold increase of TG concentrations occurred in liver biopsy specimens. Ultrastructural and cytochemical examinations of the biopsy specimens showed hyperplasia of the smooth endoplasmic reticulum, and increased canallicular activity of gamma-glutamyl transferase (gamma-GT) activity in most subjects towards the end of and after the ethanol intake period. Serum gamma-GT levels also increased significantly.

Adipose Tissue↗