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Biomedical subjects

A Pesce

Publications and source records attributed to A Pesce.

At least 163 records · Page 9Linked to original sources
PubMed1985

[Multiple myeloma with 5-year survival. Study of initial prognostic factors. Role of beta-2-microglobulin].

A series of 21 patients with multiple myeloma and a survival of more than 5 years was compared to another series of 70 cases of myeloma, which all died within less than 5 years. The statistical analysis of these two groups revealed six factors with a significant prognostic value. The population with a long term survival presented: a low incidence of large tumour masses (stage III according to Durie and Salmon's classification): 24 per cent compared with 72 per cent p less than 0.01); a frequency on asymptomatic or minimally symptomatic forms of 29 per cent versus 7 per cent in the control series (p less than 0.001); a haemoglobin level of 7.3 mmol/l versus 6.4 mmol/l (p less than 0.01); a low beta-2-microglobulin level (4 mg/l versus 11 mg/l) (p less than 0.02); a usually normal serum creatinine level (p less than 0.05). Retrospectively, the authors also observed that the response to treatment constituted an essential prognostic factor (69 per cent response compared with 20 per cent) (p less than 0.001). The serum calcium, the immunological type, the level of monoclonal component and the marrow plasmocytosis did not differ between the two groups. The authors consider all of these parameters, together with the calcitonin hypocalcaemia test to be useful in three situations: the therapeutic decision in minimally symptomatic patients, the choice between single agent or combination chemotherapy, the establishment of criteria of remission and suspension of treatment.

Adult↗
PubMed1985

Biological characterization of FPV, Ulster 73, replicative cycle.

The replication of an avian influenza A, Fowl plague virus (FPV), Ulster 73 strain, was studied in chick embryo fibroblasts, assumed to be the natural host, and in cells of different origin such as LLC-MK2, Hep-2, Vero, KB and Mc Coy. In the natural host, FPV shows a characteristic pattern of polypeptide synthesis suggesting a transcriptional and/or translational mediated control mechanism, specific for this strain of influenza A. FPV was able to give a productive infection in all the above mentioned cells releasing mature viral particles. This behaviour is very interesting if one compares FPV, Ulster strain to FPV, Rostock strain. These viruses, belonging to the same antigenic subtype (H7 N1 group) recognize the same cellular determinants but Rostock strain undergoes an abortive replication whereas Ulster strain gives productive infection in all cellular lines tested. These observations lead to postulate a viral genetic mechanism controlling host range both at early and late steps in infection. This genetic mechanism controls the interaction between viral and cell molecules affecting synthesis of virus specific polypeptides.

Animals↗
PubMed1984

Shared determinants of native and denatured bovine serum albumin are recognized by both B- and T-cells.

The antigenic relationship between native and denatured bovine serum albumin (BSA) was investigated by examining specificity of antibodies directed against both proteins. Polyclonal antibodies produced to native and denatured BSA in hyperimmunized mice were specific for the homologous molecule. In contrast, polyclonal antibodies formed early in the response to native BSA reacted both the denatured and the native molecule. Monoclonal antibodies to native BSA were specific for the homologous antigen, while one of three clones prepared by immunization with denatured BSA produced an antibody cross-reactive with native BSA. Our results suggest that shared determinants of native and denatured BSA molecules can be recognized by both B- and T-cells.

Animals↗
PubMed1984

[The study of a population of drug addicts and/or homosexuals with chronic polyadenopathy].

A population including homosexual or heroinoman patients with lymphadenopathy is reported with special reference to Beta-2-microglobulin. This molecule seems to be more related to concomitant infection rather than to a high risk group. Thus, elevated Beta-2-microglobulin is useful to exclude infected donors but no high risk SIDA population.

Acquired Immunodeficiency Syndrome↗
PubMed1984

High dose intravenous gammaglobulin and platelet transfusions in leukaemic HLA-immunized patients.

3 aplastic patients with acute leukaemia, strongly HLA-immunized and refractory to platelet transfusions, received polyvalent gammaglobulin i.v. infusions (0.4 g/kg/d for 5 or 6 d) in association with daily random platelet transfusions. Platelet recovery was obtained in 2 patients. The 3rd patient did not show any significant rise in platelet count. The ability of gammaglobulin to prolong the life-span of incompatible transfused platelets could facilitate the management of HLA-immunized patients.

Adult↗
PubMed1984

Effect of coumermycin on influenza A virus replicative cycle.

Coumermycin A1, a Novobiocin related antibiotic, has been tested in vivo and in vitro for its activity on Influenza A viruses. In a range of concentrations between 3 and 5 micrograms/ml virus production was drastically reduced. The drug was able to inhibit virus release into culture medium also if added up to the sixth hour following infection and its action was reversible within this time. The synthesis of virus induced polypeptides was generally depressed but production of the HA was more deeply inhibited. Viral transcriptase activity in vitro was also affected by the presence of Coumermycin A1 but at doses which seem to high to consider this event as a phenomenon likely to play a role in vivo. It is suggested that the antiviral activity of the drug is mediated by the inhibition of the host cell metabolism.

Aminocoumarins↗
PubMed1983

Immunoregulation of the anti-bovine serum albumin response by polyclonal and monoclonal antibodies.

Monoclonal or polyclonal antibodies directed toward determinants on limited structures of bovine serum albumin (BSA) (P505-582) were shown to regulate the entire anti-bovine serum albumin (BSA) immune response when passively administered to mice 24 hr prior to immunization. Regulation was observed as suppression of the humoral IgG immune response toward all BSA determinants except those on fragment P505-582. By Day 21 suppression of humoral response was most pronounced toward determinants present on the carboxy terminal end of the molecule (N 307-582). These observations demonstrate that monoclonal antibodies directed against a single determinant on a protein molecule have the capacity to regulate the immune response to a multiplicity of determinants present on the same protein. The data lend support to concepts of antibody-induced regulation by induction of suppressor cells or idiotype recognition.

Animals↗
PubMed1983

Enhancement of antigen-specific suppression by muramyl dipeptide.

The effect of the synthetic adjuvant MDP (N-acetyl-muramyl-L-alanyl-D-isoglu-tamine) on the generation of antigen-specific suppression was investigated. Suppression of the anti-bovine serum albumin response, which was achieved by intravenous administration of a peptic fragment of the antigen, was greatly enhanced by simultaneous administration of MDP. Induction of suppression by a combination of bovine serum albumin fragments and MDP was found to be antigen specific and appeared to occur via the generation of antigen-specific suppressor T cells.

Acetylmuramyl-Alanyl-Isoglutamine↗
PubMed1983

[Comparative study of 2 prognostic classification systems for myeloma and examination of the correlation between initial bone marrow plasmacytosis and prognosis. A propos of a homogeneous population of 50 patients followed from diagnosis to death].

We report the outcome of the statistical analysis of 50 myeloma patients, making a comparison of the prognosis value of the staging systems proposed by Durie and Salmon and, more recently by Merlini, Waldenström and Jayakar. Moreover, we studied the relationship between initial percentage of bone marrow plasma cells and prognosis. All patients had a complete follow-up and received the same treatment. We excluded our cases of non excreting and solitary myeloma. The staging system proposed by Durie and Salmon still has the best prognosis significance. The system proposed by Merlini, Waldenström and Jayakar does not allow a staging of the patients in rigourous conditions. The absence of a relationship between initial bone marrow plasmocytosis and prognosis corroborates the poor reliability of this staging system.

Adult↗
PubMed1982

Antibody production and antigenic specific suppression to bovine serum albumin in uremic rats.

Antibody response and antigen specific suppression to bovine serum albumin (BSA) in uremic rats have been investigated. Primary immune response was found to be significantly reduced independent of the route of administration or adjuvant while secondary response was affected only in animals in which a weak adjuvant such as Al(OH)3 was used. Antigen specific suppression of uremic rats was achieved by intravenous pretreatment with BSA or a C terminal fragment (505-582) of BSA. Secondary response in sham operated controls was suppressed by BSA but not by the fragment. There was about five-fold greater retention of the fragments in the uremic rats than in sham-operated controls at a 6 hr or later after i.v. administration.

Animals↗