Biomedical subjects

C Guglielmini

Publications and source records attributed to C Guglielmini.

6 recordsLinked to original sources

PubMed1991

Serum thymidine kinase in diagnosis and follow-up of the small cell carcinoma of the lung.

Serum thymidine-kinase (sTK) was assayed in 48 males affected by small cell carcinoma of the lung (SCCL) at the time of diagnosis. On the same drawing carcinoembryonic antigen (CEA) and beta 2microglobulin (beta 2 microG) were assayed in 19 of these subjects. For staging, the criterion of limited (LD) and extensive (ED) disease was used. Mean sTK and CEA values were above normal range in both the LD and ED groups, while mean beta 2 microG value remained below normal range. Thirty-two patients were subsequently submitted to therapy; sTK was assayed at the end of each treatment cycle. Mean sTK concentrations differed depending on response to therapy. From the data obtained it is concluded that sTK assay is helpful for diagnosis of SCCL; CEA to a lesser extent, above all in association with sTK, and beta microG not at all. sTK assay can also be useful for prognosis and follow-up.

Aged↗

PubMed1990

Changes of magnesium concentrations in endurance athletes.

Erythrocitary and serum magnesium (Mg) were determined in a group of 11 well-trained athletes before and after a 25-km running race, and in a group of 30 sedentary controls. The significant increase of mean erythrocitary Mg (EMg) concentration observed in the athletes after physical strain (2.58 +/- 0.34 mEq/l before, 3.10 +/- 0.45 mEq/l after the race: significance level = 5%) leads to the assumption that the possible Mg uptake is effected by the red blood cell to enhance some enzymatic reactions. The decrease of mean serum Mg concentration observed in the same subjects after the effort (1.70 +/- 0.14 mEq/l before, 1.64 +/- 0.15 mEq/l after the race) is not significant. The difference between mean Mg concentrations observed in the athletes' group before the race and in the sedentary group (EMg: 2.58 +/- 0.34 mEq/l in athletes, 3.67 +/- 0.38 mEq/l in sedentaries, significance level = 1%; serum Mg: 1.70 +/- 0.14 mEq/l in athletes, 1.96 +/- 0.15 mEq/l in sedentaries, significance level = 1%) suggests that athletes suffer from a Mg deficiency, partially due to physical exercise. The two hypotheses and the possible causes of the observed phenomena are discussed.

Adult↗

PubMed1990

Pre- and postsurgery activation of blood coagulation in gastric and large bowel cancers: diagnostic, therapeutic and prognostic hints.

In 12 patients with gastric cancer and in 14 with large bowel neoplasia, classified according to the TNM system, some major blood indices of hemostasis, platelet activation and fibrinolysis were assessed before and for 1 month after surgery, to show whether possible variations of such indices may provide useful clues to follow-up, treatment effectiveness and prognosis. The following conclusions may be drawn: (1) the assay of platelets, fibrinogen, AT III, fibrin(ogen) degradation products, fragment X, platelet factor 4 has provided useful clues in neither group of patients; (2) preoperative high beta-thromboglobulin (beta-TG) is a reliable index of tumor presence in both gastric and large bowel cancer; (3) postoperative high beta-TG and fibrinopeptide A (FpA) are reliable indices of (a) tumor persistence in both gastric and large bowel cancer; (b) lymph node involvement in gastric much more than in large bowel cancer; (c) metastatic spreading from gastric cancer; (4) the FpA levels are proportional to the tumor mass in gastric cancer. The finding of lower plasma heparin levels in neoplastic patients, when compared with controls (20 patients having undergone abdominal surgery for extraneoplastic affections) suggests higher than conventional doses (5,000 units every 8 h s.c.) of the drug should be given to neoplastic patients in order to prevent thromboembolic bouts and possibly reduce metastatic spreading.

Adult↗

PubMed1989

Reduction of Hb levels during the racing season in nonsideropenic professional cyclists.

Hematological variables of 40 professional cyclists, all receiving intravenous iron supplementation, were followed during a 15-month period. Mean values for red blood cells (RBC), hemoglobin (Hb), and hematocrit (Ht) were significantly lower during the racing season (RS) than during the nonracing periods (NRP) (RBC: RS = 4.53 +/- 0.34 millions/mm3, NRP = 5.09 +/- 0.36 millions/mm3; line 7 of abstract: Hb: RS = 14.2 +/- 0.9 g/dl, MRS = 15.2 +/- 0.9 g/dl; Ht: RS = 40.7 +/- 2.7% NRP = 44.4 +/- 2.9%; P less than 0.001 for all). However, mean values for ferritin and mean corpuscular hemoglobin (MCH) were significantly higher during the racing season (ferritin: RS = 422 +/- 398 ng/ml, NRP = 311 +/- 321 ng/ml, P less than 0.05; MCH: RS = 31.5 +/- 1.3 pg, NRP = 30.0 +/- 1.4 pg; P less than 0.001). These results suggest that the reductions in RBC, Hb, and Ht found in professional cyclists during the racing season are not the consequence of a diminution of iron stores but rather of reduced erythropoiesis and increased RBC destruction.

Anemia, Hypochromic↗

PubMed1978

Decrease of alpha-Hasharon globin in beta-thalassaemia.

In time course experiments performed in subjects carrying haemoglobin Hasharon and beta-thalassaemia the synthesis of alphaA-, alphaHasharon-, beta- and gamma-globin has been determined. The alpha-globin molecules synthesized in excess were found to be removed from the red cell cytoplasm (phenomenon characteristic of beta-thalassaemia, described by Bargellesi et al, 1968a); in addition the alphaHasharon-globin molecules were removed at a faster rate than normal alpha-globin. The preferential removal of the mutant alpha-globin explains the reduced level of haemoglobin Hasharon found in subjects carrying the gene for beta-thalassaemia (Alberti et al, 1975). Reductions below normal levels of other haemoglobin variants occurring in the presence of the counterpart-globin thalassaemia are probably determined through a similar mechanism.

Genes↗

PubMedDate not supplied

Serum and erythrocyte levels of magnesium in microcytosis: comparison between heterozygous beta-thalassemia and sideropenic anemia.

In thalassemia erythrocyte cation permeability is increased, but the increment in ATPase-dependent cation pumps maintains normal concentrations of Ca++, Na+ and K+. In this study we investigated erythrocyte concentrations of Mg++ in heterozygous beta-thalassemia and in microcytic sideropenic anemia. Twenty-five healthy controls, 40 heterozygous beta-thalassemics and 25 patients with sideropenic anemia were studied. Erythrocyte Mg++ was assayed either by atomic absorption or by standard laboratory methods. Erythrocyte Mg++ was significantly lower in the beta-thalassemia group than in the other two groups (p less than 0.001). Serum magnesium was significantly lower in sideropenic anemia patients than in beta-thalassemics and in controls (p less than 0.01), whereas these latter two groups showed similar values. Our results suggest that the increment in ATPase-dependent cation pumps is not sufficient to maintain normal erythrocyte Mg++ concentrations in heterozygous beta-thalassemia. In sideropenic anemia cation permeability is not increased, therefore erythrocyte Mg++ is normal. Low serum Mg++ levels in sideropenic anemia could be explained by a primary Mg++ deficit associated with sideropenia.

Adolescent↗