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Biomedical subjects

J Martorell

Publications and source records attributed to J Martorell.

84 records · Page 5Linked to original sources
PubMed1986

[Bone and joint Actinomyces meyeri infections. Cervicofacial localizations excluded. Apropos of 3 cases].

The authors report three observations of osseous and/or articular actinomycosis. Osseous localizations, always in contact with abscessed foci of the soft tissues, included the spine and one or several limbs. In one case there was an arthritis of the knee. Culture and typing of the responsible germ: Actinomyces meyeri, were obtained from infectious foci in the three cases. The authors insist on the rare occurrence, at the moment, of osteo-articular actinomycoses outside the maxillo-facial area. Actinomyces meyeri has exceptionally been implicated. The prognosis of osteo-arthritis is similar to that of other localizations. It is usually favorable due to the great sensitivity of the germs to antibiotics, especially penicillin.

Abscess↗
PubMed1985

Lymphocytotoxic antibodies in primary biliary cirrhosis.

Sera of 30 patients with primary biliary cirrhosis (PBC) and 72 normal subjects matched for age and sex were examined for the presence of lymphocytotoxic antibodies (LCAs) against B and T cells at 4 degrees C and 37 degrees C. Patients were prospectively screened for: Sjögren's syndrome, scleroderma, Hashimoto's thyroiditis, and rheumatoid arthritis, in which LCAs have been described. Seventeen patients with PBC (56.6%) had LCAs against B cells as compared with only 11 of the 72 normal subjects (P less than 0.001). Five PBC patients (16.6%) also reacted against T cells as compared with none in control group (P less than 0.01). Clinical and biochemical features and the histological stage of PBC were similar in patients with and without LCA. Sjögren's syndrome was present in 13 patients--two with scleroderma and another with Hashimoto's thyroiditis. No patient had rheumatoid arthritis. The prevalence of LCAs was similar in PBC patients with or without autoimmune associated disease (54% vs 59%). We conclude that in PBC a high incidence of LCA is unrelated to the presence of an associated disease. LCA in PBC might be a nonspecific marker of an immune disorder.

Adult↗
PubMed1980

Pirifibrate in the treatment of hyperlipoproteinemia: types IIa, IIb, and IV.

Pirifibrate was given to 53 patients with type IIa, IIb or IV hyperlipoproteinemia (HLP), and the results of the first three months of treatment were evaluated. Patients in the study had cholesterol and triglyceride plasma levels higher than 300 mg/100 ml and 200 mg/100 ml, respectively, after following a diet without any pharmacological treatment for one month. After treatment with pirifibrate, mean plasma levels of cholesterol fell about 20% in types IIa and IIb HLP; triglycerides fell between 30% and 46% in types IIb and IV HLP. Slight increases in alpha-lipoproteins in the three types of HLP were measured. Prebeta-lipoprotein levels fell considerably in types IIb and IV. The variations observed in beta-lipoprotein levels were significant only in type IV, which initially showed low values.

Adolescent↗
PubMedDate not supplied

Effect of human natural xenoantibody depletion and complement inactivation on early pig kidney function.

Preformed xenoreactive natural antibodies (XNA) and complement mediate hyperacute xenograft rejection (HXR) in pig-to-human discordant xenotransplantation. In a pig kidney-human blood xenoperfusion model, we investigated whether XNA depletion and/or human complement inactivation preserved early pig kidney function. Pig kidneys were perfused for 180 min with pig blood (AUTO group, n = 8), human blood (HETER group, n = 6), complement-inactivated human blood (COMi group, n = 5), XNA-depleted human blood (ABd group, n = 5) or complement-inactivated and XNA-depleted human blood (ABd&COMi group, n = 5). HETER kidneys were rejected after 15-30 min and showed vascular microthrombi and interstitial hemorrhages. XNA depletion and/or complement inactivation prevented HXR. The glomerular filtration rate in ABd, COMi and ABd&COMi groups was significantly lower than in the AUTO group. Also, beyond 60 min, the COMi group showed a significantly lower glomerular filtration rate than that observed in ABd and ABd&COMi groups. Kidneys from ABd, COMi and ABd&COMi groups displayed endothelial cell edema, as well as higher soluble P-selectin levels and a higher renal myeloperoxidase content than the AUTO group kidneys. COMi and ABd&COMi groups had a significantly lower renal myeloperoxidase level than the HETER group. Also, in contrast to HETER and ABd groups, these complement-inactivated groups failed to show a positive correlation between P-selectin and renal myeloperoxidase. We also investigated platelet-activating factor (PAF) as possible mediator for these functional and pathologic changes. We found that blood PAF levels were similar in HETER, ABd, COMi and ABd&COMi groups and significantly higher than in the AUTO group. Also, when PAF was added to porcine endothelial cell monolayers, morphological changes due to cytoskeleton contraction were observed, and these changes were prevented by preincubation with a PAF receptor antagonist. In conclusion, although depletion of XNA and/or complement inactivation prevent HXR, the pig kidney function is not preserved at the level of the autologous combination. The PAF overproduction observed in the xenogenic combination, which is independent of the presence of XNA and complement, may be, at least in part, responsible for early endothelial cell morphological changes still present when HXR is prevented.

Animals↗
PubMedDate not supplied

Shared HLA antigens between parents and recurrent spontaneous abortion.

Ten couples with a history of at least three (mean 3.8) consecutive spontaneous abortions of unknown etiology and 57 normal fertile couples (means 2.6 children) were tested for HLA antigens. The frequencies of shared HLA-A, -B and -DR antigens among members of the couples were similar in both groups. Our results, as well as analysis of the data in the literature, contradict HLA antigens sharing between parents as a determinant of recurrent spontaneous abortion.

Abortion, Habitual↗