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Biomedical subjects

C Ungureanu

Publications and source records attributed to C Ungureanu.

18 recordsLinked to original sources
PubMed2000

Hematologic toxic reaction to radiation therapy adjuvant to autologous peripheral blood stem cell transplantation for recurrent or refractory Hodgkin disease.

PURPOSE: To evaluate the hematologic toxic reaction to external-beam radiation therapy after high-dose chemotherapy with peripheral blood stem cell (PBSC) support in patients with Hodgkin disease. MATERIALS AND METHODS: A retrospective study of 30 cases of Hodgkin disease in patients who underwent high-dose carmustine, etoposide, and cyclophosphamide chemotherapy with PBSC support was performed. Thirteen patients underwent radiation therapy (28.8-39.0 Gy) a median of 45 days after PBSC repeat infusion. RESULTS: Radiation therapy was delivered as planned, without interruption, in all patients. Five patients developed thrombocytopenia (one with grade 1 thrombocytopenia; two, grade 2; and two, grade 3) and included three with progressive disease prior to radiation therapy and two with a history of prior irradiation. None developed a bleeding complication or required transfusion support. Five patients who underwent irradiation had thrombocytopenia (three with grade 1 and two with grade 2) 100 days after PBSC repeat infusion, compared with three patients (two with grade 1 and one with grade 3) who did not undergo posttransplantation irradiation. At the most recent follow-up, no patient without evidence of disease had a platelet count of less than 100 x 10(9)/L. CONCLUSION: External-beam radiation therapy was well tolerated in the posttransplantation setting in patients with Hodgkin disease. Thrombocytopenia was common but was not related to clinical complications.

Adolescent↗
PubMed1999

Resection and permanent I-125 brachytherapy without whole brain irradiation for solitary brain metastasis from non-small cell lung carcinoma.

We assessed a treatment plan of local therapy (resection and placement of permanent low dose-rate I-125 seeds) without whole brain irradiation in 15 patients with solitary brain metastasis (SBM) from primary non-small cell lung cancer between January, 1991 and May, 1996. Thirteen lesions were confirmed as solitary by MRI scan, and 2 patients had CT scan only. With median follow up of 14 months, 3 patients remain alive at 6, 33, and 62 months post-resection. Median survival is 14 months for all patients and 26 months for patients with SBM as the only site of disease. Five tumors failed in the brain: 2 solitary recurrences adjacent to the site of SBM, 2 multiple metastases outside the primary site, and 1 multiple recurrence including the primary site. No failures were seen with SBM <2.5 cm. Only 2 of 13 patients with SBM confirmed with MRI experienced relapses elsewhere in the brain. Recurrence rates both adjacent and outside the area of the initial brain lesion are similar to studies employing resection plus whole brain irradiation (WBI), and the patient is spared the acute and potential late toxicity of WBI. This approach may be considered for selected patients with solitary brain metastases (SBMs), although further experience with larger patient numbers is needed.

Brachytherapy↗
PubMed1981

[Immunoprophylactic methods of prevention of pneumopathies in young cattle].

The bivalent Pasteurella vaccine used to immunise young cattle is an anaculture adsorbed to aluminium hydroxide and consisting of Pasteurella multocida and Pasteurella haemolytica serotypes which could be isolated; most often from pneumonically changed lungs and nasal mucus. It was administered together with trivalent antiviral vaccine and reduced by 50 per cent the loss rate due to mortality and emergency slaughtering. Good protection was obtained from applying the first vaccination dose on the supplier's farm.

Animals↗
PubMed1981

Research on the bacteriocinogen properties of Pasteurella.

Research on the bacteriocinogen properties of 86 Pasteurella strains, 37 of which being Pasteurella (P.) multocida and 49 P. haemolytica, was performed. -Relations of iso- and heteroantagonism were detected and described in the P. multocida and P. haemolytica species. The presence of bacteriocins previously detected in P. multocida was confirmed and extended to P. haemolytica as well. -The bacteriocinosusceptible strains determined the separation of a number of bacteriocinotypes within each Pasteurella species. -Besides the antagonism relations a reciprocal growth stimulation phenomenon was noticed between the two Pasteurella species. In this respect, P. haemolytica displayed a wider activity towards P. multocida than towards itself.

Animals↗
PubMed1981

[Identification of Pasteurella serotypes by indirect hemagglutination].

The indirect haemagglutination test was used for serological type identification of Pasteurella strains. The Pasteurella multocida strains were tested by parallel application of antigen production methods (common method plus hyaluronidase treatment). Thirty-nine (72.2 per cent) of 54 Pasteurella multocida strains, which had been obtained from cattle and swine, were serologically tested by the common technique of antigen production, their types being identified, while 42 (77.7 per cent) were tested and typed by means of hyaluronidase treatment. Depolimerisation of hyaluronic acid by means of hyaluronidase increased the agglutinability of eight strains (14.8 per cent) which could thus be identified by types. Serological identification of 47 (87.1 per cent) Pasteurella multocida strains was achieved by parallel use of the two antigen production methods. Identification was not possible of two strains. Cross-reaction was recorded from five strains. Most of the Pasteurella multocida strains isolated from cattle were A serotype (54 per cent), while those of swine were B strains (50 per cent). Thirty-six of 40 serologically tested Pasteurella haemolytica strains were serotypes A1, A2, T3, T4, A5, and A6, and most of these were A5 and T4.

Animals↗
PubMed1981

Pasteurella infections in respiratory diseases of young cattle.

Bacteriological examinations performed on 545 extracts of pneumonia-affected lungs and on nasal secretions collected from pneumopathy diseased young cattle led to the isolation of 176 (32.2%) Pasteurella (p.) multocida strains and of 125 (22.9%) P. haemolytica strains. P. multocida was isolated in 46.2% of the lung lesions and in 22.5% of the nasal secretions, P. haemolytica in 26.6% and 20.3%, respectively. Pathogenicity in mice was detected in 81.9% of the P. multocida strains and in 19% of the P. haemolytica strains. Pasteurella strains were very susceptible to chloramphenicol (82.3%), tetracycline (68%), penicillin (47%), and ampicillin and resistant to oxacillin, streptomycin and kanamycin. P. multocida and P. haemolytica strains in the respiratory tract and lung lesions of young cattle affected by pneumopathies represent the main ethiologic agent accounting for the clinical symptoms, anatomic lung lesions and finally for the death of the animal.

Animals↗
PubMed1979

[Behavior of Mycoplasma strains in media with L-cystine].

Mycoplasma strains of all origins and species can grow on PPLO agar (pleuropneumonia-like organisms), if thallium and L-cystine are added. Brown-black is the coloration of the growing colonies, with the intensity of blackening varying by colony age. Blackening of the mycoplasma colonies is likely to facilitate germ counting, cloning, and evaluation of the growth inhibition test.

Agar↗
PubMedDate not supplied

[The use of echography in the diagnosis of autoimmune thyropathies].

Ultrasonography is a first line method in thyroid imaging. The aim of this study was to evaluate the usefulness of thyroid ultrasonography in the diagnosis of thyroid autoimmune diseases (TAD): Graves' disease (GD) and autoimmune thyroiditis (AT)--Hashimoto's and atrophic thyroiditis. Ultrasonography was performed with a 7.5 MHz transducer in 1033 consecutive patients. The excluding criteria was nodular goiter, irrespective of its function. Thyroid volume was calculated using the formula of a rotating ellipsoid. Hypoechogenicity was appreciated using a qualitative scale: 1 = absent, 2 = mild, 3 = moderate, 4 = marked. In patients with TAD thyroid hypoechogenicity was significantly higher than in normal subjects (2.5 +/- 1 in GD and 2.7 +/- 1 in AT, vs. 1.2 +/- 0.6 in normal subjects, p < 0.0001). The specificity of the test in identifying TAD was 91.4%, the sensitivity was 68.6% for GD and 80.8% for AT, positive predictive value was 91.5%, and negative predictive value 91.5%. Ultrasonography is useful in identifying patients with probable autoimmune thyroid diseases, being useful in epidemiological studies and having an important contribution in confirmation of the diagnosis.

Adult↗
PubMedDate not supplied

[Renal osteodystrophy (I)].

Renal bone disease represents one of the major complications of end-stage renal disease, accounting for the numerous and various changes at bone level, determined by abnormal calcium and phosphorus homeostasis and by changes in calcitriol and PTH synthesis. PTH represents as well a major uraemic toxin, exerting profound systemic effects, particularly at the cardiovascular level. PTH synthesis is mainly controlled by changes in calcium-phosphorus balance and calcitriol production by the kidneys. Several others factors are important in the development of secondary hyperparathyroidism: acidosis, autonomisation of PTH secretion and peripheral (target-organ) resistance to PTH actions. Although bone biopsy represents the definitive diagnostic test to differentiate between osteitis fibrosa, low-turnover bone disease and bone involvement unrelated to disturbed calcium metabolism (i.e. beta 2-microglobulin-related amyloidosis), plasma intact PTH generally exhibits a reasonably good relation with bone histology parameters. Moreover serum bone-specific alkaline phosphatase isoenzyme, serum pyridinoline and the novel serum markers for bone turnover are highly specific and correlate with bone histomorphometry parameters, so that, preventive and therapeutic strategies should be re-evaluated based solely on biochemical parameters.

Alkaline Phosphatase↗
PubMedDate not supplied

[Renal osteodystrophy(II)].

Renal bone disease represents one of the major complications of end-stage renal disease, accounting for the numerous and various changes at bone level, determined by abnormal calcium and phosphorus homeostasis and by changes in calcitriol and PTH synthesis. PTH represents as well a major uraemic toxin, exerting profound systemic effects, particularly at the cardiovascular level. PTH synthesis is mainly controlled by changes in calcium-phosphorus balance and calcitriol production by the kidneys. Several others factors are important in the development of secondary hyperparathyroidism: acidosis, autonomisation of PTH secretion and peripheral (target-organ) resistance to PTH actions. Although bone biopsy represents the definitive diagnostic test to differentiate between osteitis fibrosa, low-turnover bone disease and bone involvement unrelated to disturbed calcium metabolism (i.e. beta 2-microglobulin-related amyloidosis), plasma intact PTH generally exhibits a reasonably good relation with bone histology parameters. Moreover serum bone-specific alkaline phosphatase isoenzyme, serum pyridinoline and the novel serum markers for bone turnover are highly specific and correlate with bone histomorphometry parameters, so that, preventive and therapeutic strategies should be re-evaluated based solely on biochemical parameters.

Chronic Kidney Disease-Mineral and Bone Disorder↗