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Biomedical subjects

I Moraru

Publications and source records attributed to I Moraru.

At least 73 records · Page 4Linked to original sources
PubMedDate not supplied

Anorectal melanoma. Problems of histopathologic diagnosis.

The present study discusses, in the light of the comparatively restricted data in the speciality literature, two cases of anorectal melanoma emphasizing the histologic diagnostic difficulties linked to appraisal of the limits of the benign naevus formations, predominance of the achromatous zones, alternation of the benign and sarcomatous fascicular proliferations and those of the anaplastic carcinoma type. Stress is laid on the importance for the diagnosis of the histologic examination and of serial sections, in all pedunculate formations in the anorectal region as well as of the tests applied for detecting melanin.

Anal Canal↗
PubMedDate not supplied

Hodgkin's disease with predominant epitheloid cells.

The present paper reports on a 38-year-old patient with left supraclavicular adenopathy, clinically suspect of tuberculosis. Histologic examination showed disappearance of the lymph node structure due to diffuse, nodular hyperplasia of epithelioid and Sternberg-Reed cells. The particularities of this rare form of Hodgkin's disease, described by Lennert, are discussed, as well as problems of differential diagnosis.

Adult↗
PubMedDate not supplied

Sister chromatid exchange detection. The method and its usefulness in genetic counseling.

The sister chromatid exchange (SCE) detection was performed in the blood cultures from two human subjects, progenitors of some congenitally malformed children and from one patient with presumed symptoms of Bloom's syndrome. The usefulness of the SCE detection in genetic counseling and for the estimation of induced chromosomal lesions is discussed.

Adult↗
PubMedDate not supplied

Ultrastructural features in an erythrophagocytic T4 lymphoma.

Electron microscopic investigation allowed the identification and characterization of the atypical malignant cells in a case of T-cell lymphoma. The proliferating cells were endowed with characteristics belonging to two different lineages: phagocytic ability, complement receptors and ultrastructural features proper to the macrophagic lineage, and T-cell determinants (E receptors, T3, T4 and T11 antigens). The cells were peroxidase and esterase negative. The erythrocytes were partially or completely dehemoglobinized and presented the phenomenon of autolysis in different stages of evolution. Because this lymphoma is difficult to diagnose and is apparently resistant to therapy, its recognition and further study are warranted.

Biomarkers, Tumor↗
PubMedDate not supplied

The possible effect of high concentrations of propylene glycol on mitosis in human lymphocytes in vitro.

The effect of three concentrations, 1, 2 and 4 per cent, of propylene glycol has been investigated on human lymphocytes in vitro. An increased ratio of anaphase cells was observed at 4 per cent propylene glycol in the culture medium, when added for the last 24 h in 72 h blood cultures. No change in chromosome number has concomitantly been observed. A weak stathmokynetic action was induced by the same concentration of propylene glycol if administered for the final two hours of cell cultivation. These effects could be due to a delay in the normal sequence of the sister chromatid separation during mitosis, induced by the highest drug concentration.

Colchicine↗
PubMedDate not supplied

Sister chromatid exchanges induced by sarcolysine in human lymphocytes in vitro.

The effect of three concentrations of sarcolysine (0.5 micrograms/ml, 1 microgram/ml and 2 micrograms/ml) on the sister chromatid exchanges (SCE) was investigated in human lymphocytes in vitro. A dose related increase in SCEs frequencies was observed after sarcolysine administration and also a delayed development of cell cycle has been induced by the two last concentrations. The variation range of SCEs per cell was dose-dependent and it was considered to represent the acquired genetic instability induced by the drug.

Cell Division↗
PubMedDate not supplied

Ginterferon (human leukocyte interferon) efficiency in the treatment of viral diseases. 1. Efficiency in viral keratoconjunctivitis.

Ginterferon is a human leukocyte interferon (IFN) produced in the "V. Babes" Institute by in vitro culture of leukocytes separated from neonatal cord blood. Ginterferon (50,000 IU/ml) was administered to 40 patients who suffered for at least two weeks of a hepatic keratoconjunctivitis resistant to treatment with conventional regimens of human immunoglobulins, Iduviran or topical antiinflammatory drugs. In 35 cases (87%) complete recovery (total epithelialization and disappearance of all symptoms) occurred in a significantly shorter time (10-14 days) as compared to similar cases which recovered after 30-40 days by conventional treatment. Local or general untoward effects were not observed in any of the patients. Recovery in the remaining 5 cases was slower, 28-30 days. This slow response may have been due to unusual weakness of the general immunobiological condition in these patients (myocardial infarction or repeated stress) which might have favoured repeated waves of virus spreads from foci of viral latency which are not attained by the topically administered IFN.

Drug Evaluation↗
PubMedDate not supplied

The use of differential staining of sister chromatid to estimate the in vitro effect of human alpha interferon on cell division in normal and tumour cells.

Concentration of 10, 100 and 1000 I.U./ml of human leukocyte alpha interferon (IFN) were added into peripheral human blood (PBL) cultures and in KB cell cultures in the presence of 5-bromdeoxyuridine (BrdU) at 10 micrograms/ml. After 72 hours the differential staining of sister chromatid (harlequin) technique was applied in order to differentiate among the metaphases of successive cell generations occurring in the presence of IFN. The frequency of the first (M1), second (M2) and third (M3) metaphases was recorded and the replication index (RI) as well as the average generation time (AGT) was calculated for untreated controls and for each of the IFN concentrations used, both in the blood cultures and in the KB cells. In the PBL cultures a clear dose-related inhibitory effect of IFN on cell division was observed, the RI values being lessened whereas the AGT concomitantly increased by increasing the IFN concentrations. An increase in M1 metaphase frequency was observed concomitantly with a diminished number of M3 cells. In KB cells the division kinetics was not influenced by IFN as indicated by similar RI and AGT values observed in controls and in IFN treated cells. However, the frequencies of both M1 and M3 cells were slightly diminished concomitantly with a discrete augmentation of M2 cell number. The differential staining of sister chromatid thus proved a highly useful technique to investigate the different sensitivity of the normal and malignant cells to the growth inhibitory effect induced by alpha IFN in vitro.

Bromodeoxyuridine↗