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Biomedical subjects

G Huber

Publications and source records attributed to G Huber.

At least 37 records · Page 2Linked to original sources
PubMed1989

[The transformation of Basedow's struma into nodular goiter: a reason for recurrence of hyperthyroidism].

Graves' disease is characterized by a diffuse and homogeneously hyperfunctioning goiter, presumably caused by thyroid stimulating, TSH-receptor directed antibodies (TRAB). However, in many patients the serum concentration of TRAB is in no way parallel to the severity of the clinical course of Graves' hyperthyroidism. In particular, hyperthyroidism may persist or repeatedly relapse over many years despite the absence of high TRAB titers. The present study summarizes the existing evidence that this course of Graves' disease may be due to gradually evolving autonomously growing and functioning micro- or macronodules within the originally diffuse goiter.

Adult↗
PubMed1989

Food intake, body and heart composition, and heart rate in T3 plus atenolol-treated rats.

Thyroid hormones and beta-blockers both affect energy balance and the heart. The interaction of 3,5,3'-triiodothyronine (T3) and the beta-blocker atenolol on some cardiac and energy balance parameters was therefore investigated. Stock-fed male Wistar rats (approximately 400 g) received 5 micrograms (expt 1) or 1.5 micrograms (expt 2) T3.100 g body wt-1.day-1 for 3 wk, with or without atenolol. In expt 3, rats were overfed with a "cafeteria" diet before and during the experiment and otherwise treated as in experiment 2. Compared with stock-fed (expt 1 and 2) or overfed (expt 3) controls, T3 caused an increase in food intake in experiments 1 and 2 but not in experiment 3. There was a large loss of body fat in all experiments, disproportionately greater than the body weight loss. Protein loss was significant only in experiment 1 and negligible in cafeteria rats. Heart rate and weight were increased, although heart composition remained unchanged. Atenolol, in a dose that abolished T3-induced tachycardia, did not modify any of the other T3 effects investigated, including the hypertrophy of the heart. These results indicate that T3-induced tachycardia can be abolished by concomitant treatment with a beta-blocker without altering parameters connected with energy balance, whereas protein loss caused by T3 can be attenuated by lowering the dose of T3 used and can be further blunted by dietary manipulation (cafeteria overfeeding).

Animals↗
PubMed1989

Basic symptoms in schizophrenic and affective psychoses.

The study compares schizophrenic and affective psychoses with regard to basic symptoms. 30 patients in schizophrenic pre-, intra-, and postpsychotic basic stages and 30 patients in endogenous-depressive phases were examined according to the Bonn Scale for the Assessment of Basic Symptoms. The most important result is that certain cognitive basic symptoms and cenesthesias which are decisive for the development of florid productive-psychotic phenomena are found more frequently in the group of schizophrenias.

Adult↗
PubMed1989

Slow growth but intense hypertrophy of thyrocytes in long-standing Grave's goitres.

In order to evaluate the relative contribution of true cell replication, in comparison to mere cell hypertrophy, to the notoriously slow growth of toxic Graves' goitres persistently exposed to TSH receptor antibodies and requiring continuous thyrostatic treatment for more than one year, we have determined the fraction of dividing cells in 8 such goitres, using the monoclonal antibody Ki-67. This antibody identifies cells in late G1-, S-, G2- and M-phase. The fraction of Ki-67 positive cells ranged from 0.1 to 4.1% with a mean of 2.3 +/- 1.6. The apparently low absolute number of dividing cells is in full accordance with growth rates observed in multinodular goitres and in benign tumours of thyroidal and non-thyroidal origin. It is compatible with continuous, intense growth stimulation of the gland, particularly since thyrocytes may down-regulate their growth response when exposed to chronic stimulation. The observations account for the clinical observation that goitres, and in particular Graves' goitres, may take years to double their total mass of thyrocytes, whereas cell hyperplasia and functional overactivity (if untreated) continue unabated.

Adult↗
PubMed1989

The concept of basic symptoms in schizophrenic and schizoaffective psychoses.

This paper presents the psychiatric aspects of the concept of basic symptoms (BS), especially history, actual position and tendencies of development of the doctrine of BS, phenomenology and clinical picture of basic stages, the Bonn Scale for the assessment of dynamic and cognitive basic deficiencies (BSABS) and the importance of this concept for early diagnosis, therapy, prevention and rehabilitation. The patients experience and communicate the BS as deficiencies and are able to cope with, adapt and compensate for them. The BS were termed as basic symptoms because they represent the basis of the productive-psychotic symptomatology. Follow-up studies of cases with the suspicion diagnosis "prodrome of schizophrenia" based on BSABS rating, revealed that the subgroup passing over in schizophrenic psychoses after an average of 6.3 years showed significantly higher scores of cognitive BS at the time of index investigation. It now seems possible to impede increase of cognitive BS already present in prepsychotic prodromal states before reaching the threshold of transition into productive-psychotic symptomatology. Long-term development is more favorable if therapy commences as early as possible including the prepsychotic basic stages and also taking into consideration BS which were, until now, disregarded in DSM-III. Summarizing our findings of the last 30 years we suggest that the BS-concept may be an approach to overcome the dichotomy of negative and positive psychopathology in schizophrenia.

Cognition Disorders↗
PubMed1988

[Aneurysms as a rare cause of chronic subdural hematomas].

Chronic subdural haematomas are nowadays usually diagnosed via computed tomography. Followups are also by this method. It is therefore inevitable that aneurysms or other vascular malformations are overlooked as rare but important causes of such haematomas. If anamnesis, findings and course are atypical, it is recommended to attempt additional angiographic clarification at least in such cases.

Cerebral Angiography↗
PubMed1988

[Bullous amyloidosis].

The patient, a 75-year old man, was admitted in May, 1986 for separation of the epidermis and extensive ecchymotic patches. Physical examination showed numerous haemorrhagic erosions on the extensor aspect of the limbs, feet and hands, and wide patches of epidermal separation in the axillary and dorsal regions. Ecchymotic purpura was present on the limbs, abdominal wall, neck and right orbital region. Nikolsky's sign was positive at the periphery of the lesions. Epidermal cysts, 1 to 5 mm in diameter, were visible on the back of the hands and on the upper part of the neck. There was no macroglossia. Several biopsies were performed in both diseased and healthy skin. Light microscopy of the diseased skin showed, at the junction of the papillary and middle dermis, a band of eosinophilic deposit in which were true intradermal bullae containing red cells. Congo red and thioflavine T stainings were positive, forming a dermal band. At direct immunofluorescence IgG, IgA, IgM as well as the C3 and C9 components of complement were absent. At electron microscopy there was no bullous separation at the dermoepidermal junction; the dermal deposits had a dense amyloid-like fibrillar structure without ramifications. Laboratory examinations showed lambda-2 monoclonal gammopathy with normal levels of IgG and IgA and slightly decreased IgM. Bence-Jones protein was found in the ruin. Bone marrow examination showed 8 p. 100 plasmocytes. The diagnosis was: non myelomatous lambda-2 monoclonal dysglobulinaemia. Amyloid deposits were found in biopsies of the gums and rectum. Other investigations gave negative results. Bullous lesions have been reported in about 20 cases of primary amyloidosis.(ABSTRACT TRUNCATED AT 250 WORDS)

Aged↗
PubMed1987

[High incidence of unexplained hypoalbuminemia in an internal medicine practice].

The frequent observation of hypoalbuminemia in patients without hepatic disease or renal protein loss led us to compare different methods of direct and indirect serum albumin measurement. One hundred patients were randomly selected and analysed retrospectively and the serum albumin was related to clinical, hematological and biochemical parameters. 51Cr labeled albumin was injected intravenously in 6 healthy volunteers and 8 patients with hypoalbuminemia to obtain further information on the pathogenesis of hypoalbuminemia. The results obtained by the method using bromcresol purple were almost identical with those obtained by immunological methods. On the other hand, serum electrophoresis gave results that were a mean 14% higher than those with the method using bromcresol purple. Nearly half of the patients selected randomly, generally without signs of liver disease or renal protein loss, were hypoalbuminemic. There was no correlation with the age, sex, blood sedimentation rate, serum orosomucoid, hemoglobin, aminotransferase or the prothrombin time. 51Cr labeled albumin showed normal disappearance in four patients and an accelerated disappearance in another four patients. Hypoalbuminemia is a common finding in internal medicine which is underestimated in incidence and extent when serum electrophoresis is used. There is no correlation with the age and the hematological or chemical parameters measured. Both reduced synthesis and/or increased loss or catabolism are important factors in the pathogenesis of hypoalbuminemia.

Age Factors↗
PubMed1987

Human interferon-gamma increases adhesion of cultured carcinoma cells to the substratum.

Effects of human recombinant-DNA derived interferon-gamma and -alpha 2 on the adhesion of cultured breast cancer cells (BT-20, ZR-75.1, MCF-7, 734-B and Hs-578-T), larynx carcinoma cells (HEP-2), epidermoid carcinoma cells (KB), lung carcinoma cells (CCL 185), and ovarian carcinoma cells (1847) to the surface of cell culture plastic dishes were studied. Layered cells were detached after a 3-day treatment with interferon either by trypsin-EDTA, trypsin, protease or cooling to 4 degrees C. Treatment with interferon-gamma (500 unit/ml) significantly increased the incubation time for trypsin-EDTA, EDTA and at 4 degrees C necessary to bring cells into suspension for the 4 cell lines BT-20, ZR-75.1, MCF-7 and HEP-2. Interferon-alpha 2 was not able to induce a similar effect. Reattachment of interferon-gamma treated ZR-75.1 cells was not increased after harvesting by trypsinization or EDTA action. Decreased adhesion of cultured cells is associated with transformation and the effects of interferon-gamma may be explained by reinforced normal phenotype. Interferon-gamma induced adhesion was not associated with other interferon effects especially the anti-proliferative activity or modulation of surface antigens.

Breast Neoplasms↗
PubMed1987

Influence of monoclonal antibodies on microtubule assembly.

The influence on microtubule assembly in vitro of monoclonal antibodies against microtubule-associated proteins (MAPs) was studied. Light scattering was used for measuring net polymer formation and electron microscopy for determining the influence of antibodies on microtubule morphology. Control experiments showed that nonimmune mouse IgG had no effect on either the assembly or appearance of microtubules. The same was true for monoclonal antibodies against MAP1. At low levels, antibodies against MAP2 caused the aggregation of microtubules into bundles, an effect that did not occur with antibodies against any other MAP type studied. At increasing concentrations, anti-MAP2 progressively inhibited tubulin polymerization, producing irregular, shortened filaments. Anti-MAP5 produced a striking fragmentation of microtubules into very short pieces that were otherwise morphologically identical to control microtubules. The different effects of these antibodies show the potential of monoclonal antibodies for investigating MAP function and form an important adjunct to cellular microinjection experiments.

Animals↗
PubMed1986

The novel microtubule-associated protein MAP3 contributes to the in vitro assembly of brain microtubules.

MAP3 is a novel microtubule-associated protein found in brain and a variety of other tissues (Huber, G., Alaimo-Beuret, D., and Matus, A. (1985) J. Cell Biol. 100, 496-507). In this study, monoclonal antibodies were used to assess its influence on the polymerization of brain tubulin. When added to unpolymerized brain microtubules, anti-MAP3 IgG produced a dose-related inhibition of subsequent assembly. Under the same circumstances, nonimmune mouse IgG did not influence either the rate or the extent of tubulin polymerization. We also used immobilized antibodies to deplete brain MAPs selectively in either MAP3 or MAP1. MAP3-depleted MAPs showed a reproducible decrease in activity compared to control preparations that had been exposed to immobilized nonimmune IgG. MAP1-depleted MAPs did not differ significantly in performance from the nonimmune treated controls. We conclude that MAP3 contributes to the net assembly of brain microtubules observed in vitro. This may be particularly relevant in neonatal animals where brain MAP3 is more abundant than in the adult.

Animals↗