Biomedical subjects
Publications and source records attributed to Y Barak.
A patient with symptoms clinically resembling Edwards's syndrome is presented. Cranial asymmetry, thoracic and lumbar hemivertebrae, and an additional rib were the unusual features. The cytogenetic studies revealed the coexistence of three separate cell lines with 45,XY,--18/46,XY/47,XY,+18 complement.
In 8 children with acute myelomonocytic leukemia (AMML), colony formation in soft agar cultures derived from bone marrow cells was studied in an attempt to differentiate the monocytic (Schilling) from the myelomonocytic (Naegeli) types. The children did not differ markedly in their clinical and morphological parameters. Three in vitro growth patterns were observed: markedly decreased or no growth in 4 cases, extensive growth of granulocytic colonies in 2 cases, and extensive growth of macrophage colonies in the remaining 2. It is suggested that the marrows presenting diminished or no growth patterns are presumably of acute myelogenous leukemia patients with a monocytic component. The excessive granulocytic or macrophage colony growth may be an in vitro indication for an in vivo proliferation of either granulocytic or monocytic leukemic cell lines, and therefore may represent the Naegeli or Schilling variants of AMML respectively. If these observations can be approved in a larger series of AMML patients, this approach can be valuable as another tool in the differential diagnosis of the subtypes of AMML in children.
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4 children with unilateral facial palsy--Bell's palsy (BP)--had serological evidence of primary infection with Epstein-Barr virus (EBV). Concomitant infection with cytomegalovirus (CMV) was demonstrated in 1 child while in all 4 children a rise in antibody titers to an additional one or two viruses was demonstrated. The viruses involved were herpes simplex, CMV and adenovirus which are latent in humans. Immunosuppression induced by EBV and steroid treatment may cause reactivation of these viruses resulting in rise in antibody titers. The need for prolonged serological follow-up for possible reactivation of latent viruses in BP is emphasized.
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Addition of dimethylsulfoxide at concentrations of 1% and 2% (vol/vol) to cells of mouse neuroblastoma clone NIE-115 in the confluent phase of growth resulted in the production of morphologically differentiated cultures with extensive process formation. Cell maintained in 2% dimethylsulfoxide remained in a stable nondividing condition for periods of up to 4 weeks. A high degree of electrical excitability was found in these cells, but there was no clear correlation of this property with the level of induction of either acetylcholinesterase (acetylcholine hydrolase; EC 3.1.1.7) or tyrosine hydroxylase [L-tyrosine, tetrahydropteridine:oxygen oxidoreductase (3-hydroxylating); EC 1.14.16.2]. In addition, intracellular levels of cyclic 3':5'-AMP were not elevated in fully morphologically and electrically differentiated cells. While cell division was markedly inhibited by 2% or higher concentrations of dimethylsulfoxide, at 1% growth continued at a somewhat slowed rate and such cultures exhibited enhanced process formation and electrical activity for a relatively short period. High concentrations (3% or 4%) of dimethylsulfoxide totally suppressed process formation and did not result in increased excitability, but cells maintained high resting potentials. The results suggest that the development of the excitable membrane in neuroblastoma cells may be expressed independently of neurospecific enzyme induction, and does not require a sustained elevation of cyclic 3':5'-AMP levels.
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Human spleen-conditioned medium can induce the formation in vitro of large granulocyte colonies from normal human bone marrow cells. The granulocyte colonies contained cells in various stages of differentiation, from myeloblasts to mature neutrophile granulocytes. Human spleen-conditioned medium also induced colony formation with rodent bone-marrow cells, whereas rodent spleen-conditioned medium induced colony formation with rodent bone marrow but not with human cells. This in vitro system has been used to determine the potentialities for cell differentiation in bone-marrow and peripheral blood cells from patients with a block in granulocyte differentiation in vivo. The cloning efficiency, colony size, and number of mature granulocytes in bone-marrow colonies from patients with congential neutropenia, whose bone marrow contained only 1% mature granulocytes, were not less than in people whose bone marrow had the normal level of about 40% mature granulocytes. The cloning efficiency of peripheral blood cells from patients with acute myeloid leukemia was 350 times higher, with 10 times larger colonies, than the cloning efficiency of peripheral blood cells from normal people. The cytochemical properties and number of mature granulocytes in colonies from the leukemic patients were the same as in colonies from non-leukemic people. The results indicate that a block in cell differentiation in vivo, in these cases with neutropenia and acute myeloid leukemia, was overcome in vitro, in the presence of an inducer in the conditioned medium. In patients with chronic myeloid leukemia, colony formation was induced only in some of the cases. This indicates that there are blast cells with different potentialities for the development of colonies in different patients.
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A variety of psychiatric disorders accompany multiple sclerosis (MS), affecting the spheres of cognition, affect, and personality. These disorders may be of primary and/or secondary nature, reflecting, respectively, neurologic damage and/or functional distress associated with a disabling disease. Evaluation of the nature, severity, and frequency of affective symptoms of MS patients is of importance to sensitize the treating physician to the possible need for specific psychiatric treatment. We conducted a prospective cross-sectional study assessing correlations of psychiatric symptomatology and the neurologic parameters of disease duration, disease activity (as expressed by the number of disease exacerbations per year), and disease severity (as measured by the Kurtzke Expanded Disability Status Scale [EDSS]) in 20 relapsing-remitting (RR)-MS patients. Patients were also evaluated by a semistructured psychiatric interview and the following rating scales: Hamilton Anxiety Scale (HAS), Hamilton Depression Scale (HDS), Hackett-Cassem Denial Scale, and Lubin Adjective Affective List. Results demonstrated a high prevalence of anxiety (90%) and to a lesser extent depression (50%) in RR-MS patients. Depression and anxiety were found to be associated with disease activity, but not with disease duration or severity. The mechanism of denial played a significant role in the psychiatric profile of the disease and was correlated with disease duration. We suggest that in RR-MS patients, psychiatric evaluation should also include assessment of defense and coping mechanisms, which in turn could guide specific individualized treatment.
The Holocaust was the most traumatic experience to occur in the 20th century. The present study aims to assess elderly Holocaust survivors in a long-stay psychiatric setting. Data concerning hospitalized survivors were gathered from medical records, repeated interviews (Structured Clinical Interview for DSM-III [SCID]) with patients, and family interviews. Subjects were all inpatients at Israel's largest psychiatric hospital, Abarbanel Mental Health Center. Patients hospitalized in the same setting who did not undergo the Holocaust were the comparison group. Of the center's 670 beds, 74 (11%) are designated for psychogeriatric patients. Forty-four (59.5%) patients in the psychogeriatric section are Holocaust survivors. There were 41 women and three men in our series. Mean age of the group was 76.2 years (range, 54 to 92). The most frequent diagnosis was schizophrenia (22 of 44). Nearly 30% had been hospitalized chronically since the Holocaust. Mean current hospitalization time was 11.2 years (range, 1 to 45). The frequent diagnosis in the comparison group was also schizophrenia (20 of 30), but indexes of chronicity were more favorable. The severity and the chronic, deteriorating course of illness in this subgroup of survivors may be due to the massive life-long psychologic disintegration imposed by the Holocaust.
Collecting is a normal phenomenon, in contrast with pathological collecting, or hoarding. Is hoarding a different phenomenon, or an extreme aspect existing on the same spectrum of behavior? How may these phenomena be understood when they are part of everyone's repertoire on one hand, but may be symptomatic of a grave disturbance on the other hand. An overview and a discussion of hoarding are presented.