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Biomedical subjects

G Bertolino

Publications and source records attributed to G Bertolino.

At least 37 records · Page 2Linked to original sources
PubMed1986

Effect of a monoclonal antibody against GPs IIb-IIIa on platelet aggregation and ATP secretion.

A murine monoclonal antibody against glycoproteins IIb-IIIa of platelet membrane completely abolished platelet aggregation induced by epinephrine, arachidonic acid, and low concentration of collagen and thrombin, but it had only minor inhibitory effects on aggregation induced by ADP, higher amounts of collagen and thrombin, and these agents combined in pairs. The simultaneous studies of aggregation and ATP secretion demonstrated that aggregation plays an essential role in stimulating the platelet-release reaction, except for the thrombin-induced ATP secretion that seems to be largely dependent on fibrinogen binding to platelet surface.

Adenosine Triphosphate↗
PubMed1985

Cytochemistry of dipeptidylaminopeptidase IV and II in normal and neoplastic lymphoid cells.

Cytochemical methods were used to determine the distribution of dipeptidylaminopeptidase IV (DAP IV) and II (DAP II) in lymphoid cell populations from patients with lymphoproliferative diseases. Special attention was paid to unusual intracellular distribution patterns which might correlate with the presence of various membrane markers. In healthy patients, about 50% of the circulating lymphocytes were found to be positive to both reactions, the intracellular distribution patterns being variable. The DAP IV reaction was negative in all B-CLL cases. In 2 cases of T-CLL with phenotype E+ OKT3+T4-T8+ one was negative and one was weakly positive, while two cases of T-CLL with phenotype E+ OKT3+T4+T8- were both strongly positive. The other non-T lymphoproliferative diseases studied were negative for DAP IV, while one T-ALL and three T-lymphoma cases showed a strong granular or diffuse distribution. The DAP II reaction was strongly positive in all the T lymphoproliferative diseases studied, irrespective of their immunological phenotype. This reaction was also weakly positive in some cases of plasmocytoma and lymphoplasmacytoid lymphoma.

Antibodies, Monoclonal↗
PubMed1983

[Computerized axial tomography in the study of orbital pathology].

In recent years, C.A.T. has revolutionized the diagnostic iter in the field of orbitary pathology. Although echotomography has reached very good results in this field, C.A.T. still remains, according to the Authors the most reliable diagnostic approach, because of its excellent insight of normal and pathological orbital material. the analysis of personal casistics of 120 orbital tomodensitometric examinations has proved this event, especially as retrobulbar expansive pathology is concerned.

Humans↗
PubMed1979

[Calcified meningiomas: anatomo-radiographic correlations and description of some clinical cases (author's transl)].

A review has been carried out of the literature concerning the frequency of calcifications in meningiomas. Four cases of meningiomas with calcifications are presented with the description of the anatomo-radiologic findings. The preoperative diagnostic value of the calcifications is stressed. The mechanisms of calcium deposition in the neoplastic tissues are discussed.

Adult↗
PubMedDate not supplied

Heparin infusion facilitates ex vivo spontaneous platelet aggregation in patients with acute myocardial infarction who have undergone thrombolytic therapy.

We investigated ex vivo spontaneous platelet aggregation (SPA) in platelet-rich plasma in 37 patients with acute myocardial infarction. It occurred in about 50% of subjects receiving heparin after streptokinase treatment, while it rarely took place in patients who did not receive either streptokinase or heparin and in those treated with streptokinase alone. The study of patients receiving heparin for deep vein thrombosis suggested that SPA may derived from adenosine diphosphate released from platelets during sample handling. We suggest that heparin infusion may facilitate ex vivo platelet activation and that this mechanism is operative in patients with acute myocardial infarction who have undergone thrombolytic therapy.

Heparin↗
PubMedDate not supplied

Effect of anagrelide on platelet count and function in patients with thrombocytosis and myeloproliferative disorders.

BACKGROUND: Anagrelide is a quinazolin compound developed initially as an inhibitor of platelet aggregation. Since "in vivo" studies demonstrated that it was responsible for thrombocytopenia in humans, anagrelide has been used recently in a small number of patients with thrombocytosis and myeloproliferative disorders. Platelet count was well controlled in the large majority of patients, and only minimal side effects were observed. PATIENTS: Eight patients (5 with essential thrombocythemia, 2 with chronic granulocytic leukemia, and 1 with idiopathic myelofibrosis) received anagrelide (induction dose 4 mg/die; mean maintenance dose 2 mg/die; mean observation time 26 weeks). Complete blood counts were determined 4 times during the first month, and subsequently every month. "In vivo" and "ex vivo" platelet function was studied before anagrelide and after 4 and 10 days of therapy. RESULTS: Platelet count was reduced and maintained below 500 x 10(9)/L in 5 of 8 patients. Headache, palpitation/tachycardia, gastrointestinal symptoms and a decrease in hemoglobin were the side effects. Anagrelide did not modify the leukocyte count or "in vivo"/"ex vivo" platelet function. CONCLUSIONS: Anagrelide may control thrombocytosis in patients with myeloproliferative disorders, even when traditional drugs have failed. When required, anti-aggregating drugs may be associated with anagrelide, since it has no effect on platelet function.

Adult↗
PubMedDate not supplied

Qualitative and quantitative platelet defect with bleeding symptoms as presenting feature of non Hodgkin lymphomas.

A young man with bleeding symptoms, mild thrombocytopenia and abundant marrow megakaryocytes was classified as having idiopathic thrombocytopenic purpura. Neither prednisone therapy nor splenectomy modified the clinical picture. Subsequently, a severe defect of platelet aggregation and release reaction was demonstrated. Fifteen months after the onset of bleeding symptoms, fever and hepatomegaly appeared and the diagnosis of T cell non Hodgkin lymphoma was made on the basis of a histologic review of paraffin sections of the spleen. Chemotherapy induced remission of the lymphoma, disappearance of bleeding symptoms and normalization of the platelet count and function.

Adult↗
PubMedDate not supplied

Ultrasonography and blood flow velocity waveform assessment in human fetuses.

The authors report their experience with the use of ultrasonography and fetal blood flow measurement in the evaluation of fetal conditions recording patients with previous repeated immunologic abortion (R.I.A.) and with pre-eclampsia. In both groups of patients, the two biophysical methods, proved to be extremely valuable indicators of the fetal conditions.

Abortion, Habitual↗
PubMedDate not supplied

Uteroplacental blood flow in pregnant women with hypertension and recurrent spontaneous abortion.

Uterine velocimetry was performed in 13 pregnant women with pregnancy induced hypertension (PIH) and in 15 pregnant women with recurrent spontaneous abortion syndrome (RSA-S). Measurement were performed on both uterine arteries and averaged. 75% of PIH group had RI 95th percentile from the first measurement (20 weeks gestation). In the RSA-S group, RI was between 75th and 95th percentile, suggesting an almost pathological vascularization.

Abortion, Habitual↗
PubMedDate not supplied

Immunologic recurrent abortion: comparison between immunotherapies.

The Authors record the results in a group of patients with immunologic recurrent abortion (IRA) treated with two different immunoprophylaxis regimen. The first one is an active prophylaxis therapy with preparation and administration from donor mononucleates. According to their previous original experience, the Authors started giving high doses of IV-Ig (HD IV-Ig) in a second group of pregnant patients with the same diagnosis of immunologic recurrent abortion (IRA). The results of this not randomized study show better reproductive outcome in the group treated with use of HD IV-Ig.

Abortion, Habitual↗
PubMedDate not supplied

[Results of splenectomy in 45 cases of idiopathic thrombocytopenic purpura: search of prognostic indices].

We report on the effects of splenectomy in 45 consecutive patients affected by idiopathic thrombocytopenia who did not obtain lasting remission with prednisone therapy. None of the patients had serious complications after surgery, and only one died a year later from an infectious disease. Two years after surgery, 89% of the patients were in remission; 79% had no therapy after splenectomy, while 10% achieved remission in response to additional medical treatment. A significantly better response to splenectomy was obtained in the subjects under 50 years old (90% remission) and by the younger patients who had had a transient response to initial prednisone therapy (100% remission). All patients with thrombocytosis 15 days after surgery were in remission two years later. We were unable to identify parameters constantly associated with a poor response to splenectomy, since at least 25% of the patients with the worst prognostic features obtained lasting remission.

Adolescent↗