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B Coll-Vinent

Publications and source records attributed to B Coll-Vinent.

27 records · Page 2Linked to original sources
PubMed1996

Leucocyte/endothelial cell adhesion receptors in muscle biopsies from patients with idiopathic inflammatory myopathies (IIM).

Interactions between leucocytes and endothelial cells through specific adhesion receptors play an increasingly recognized crucial role in the development of inflammatory infiltrates in chronic inflammatory diseases. In this study we investigated adhesion molecule expression in muscle biopsies from 18 dermatomyositis, six polymyositis, five inclusion-body myositis patients and from eight normal controls. Immunohistochemical detection of leucocyte integrins LFA-1 and VLA-4, their endothelial counter-receptors intercellular adhesion molecule-1 (ICAM-1) and vascular cell adhesion molecule-1 (VCAM-1), and the endothelial cell markers CD31 and von Willebrand factor-related antigen (vWFAg) was performed using specific MoAbs and an alkaline phosphatase anti-alkaline phosphatase technique. ICAM-1 expression was up-regulated and VCAM-1 induced in muscle capillaries of dermatomyositis samples. In both dermatomyositis and polymyositis, endothelial cells from vessels surrounded by inflammatory infiltrates strongly expressed ICAM-1 and VCAM-1. Infiltrating leucocytes were intensively LFA-1- and VLA-4-positive. These data suggest that leucocyte/endothelial cell interactions mediated by the receptor/ligand pairs LFA-1/ICAM-1 and VLA-4/VCAM-1 actively participate in the development of muscle inflammatory infiltrates in the major inflammatory myopathies. In addition, ICAM-1 and VCAM-1 over-expression by capillary endothelial cells in dermatomyositis supports the hypothesis that capillary activation and/or injury is a major feature in this disease.

Adolescent↗
PubMed1995

Haemophilus paraphrophilus endocarditis: case report and review.

Endocarditis due to Haemophilus paraphrophilus is an uncommon disease. We report a case of H. paraphrophilus endocarditis with embolic complications in which the causative organism was resistant to beta-lactam antibiotics. Before April 1994, 16 cases of H. paraphrophilus endocarditis had been reported. Infection by this organism usually affects a previously damaged mitral valve. We emphasize the fastidiousness of the organism and the high incidence of embolic complications, which determine the outcome. To our knowledge we describe the first patient with endocarditis due to beta-lactam-resistant H. paraphrophilus.

Adult↗
PubMed1994

Immunohistochemical characterization of inflammatory cells and immunologic activation markers in muscle and nerve biopsy specimens from patients with systemic polyarteritis nodosa.

OBJECTIVE: To investigate the phenotype of infiltrating cells in classic lesions of polyarteritis nodosa (PAN). METHODS: Twenty-one muscle and 10 sural nerve biopsy samples from 24 patients with systemic PAN were studied using avidin-biotin-peroxidase and alkaline phosphatase-anti-alkaline phosphatase immunohistochemical techniques. RESULTS: The inflammatory infiltrates consisted mainly of macrophages (41%) and T lymphocytes (41%), particularly of the CD4+ subset. Granulocytes were present in varying quantities (0-45%) and were more abundant in heavily infiltrated vessels and in those with fibrinoid necrosis. Dendritic cells could be identified in 4 samples. Proliferating and interleukin-2 receptor-expressing cells, present in 71% and 79% of the patients, respectively, were more frequent in untreated patients. CONCLUSION: T cell-mediated immune mechanisms may play a role in the development and perpetuation of PAN lesions.

Adult↗
PubMed1994

[Inclusion-body myositis: a familial report of 3 cases].

Inclusion body myositis (IBM) is a myopathy classified until now within the group of idiopathic inflammatory myopathies (IIM). Nevertheless, its clinical and histological features are specific and different from the other IIM. It is refractory to corticosteroid therapy. Recently, a few cases of IBM with familial transmission have been described, which is the first report in our country; previous reported cases in literature are reviewed. The similarities of some forms of IBM with muscle dystrophies, rather than with inflammatory myopathies are discussed.

Adolescent↗
PubMedDate not supplied

Symptomatic myopathies in HIV-1 infected patients untreated with antiretroviral agents--a clinico-pathological study of 30 consecutive patients.

OBJECTIVE: To assess the clinico-pathological profile of symptomatic myopathies developing in HIV-1 infected patients before use of any antiretroviral therapy. DESIGN: Prospective, cross-sectional study. SETTING: University-referral, tertiary care Hospital. PATIENTS: Thirty consecutively admitted, HIV-1 infected patients untreated with antiretrovirals and with clinically suspected skeletal myopathy or raised serum creatinkinase levels. INTERVENTIONS: Clinical assessment of muscle strength and open muscle biopsy regarding to histopathological features. RESULTS: Most of the HIV-1 infected patients were weaker when compared to the matched healthy control group. Only a few patients presented with myalgia. In one third of the cases an inflammatory condition (microvasculitis, myositis) was evident. In another third minor myopathic changes were observed, while in the remaining cases muscle biopsy was normal. Abnormal values of CK correlated poorly with pathologic diagnosis. CONCLUSIONS: In a significant proportion of HIV-1 infected symptomatic patients a specific treatment can be given when the existence of an inflammatory condition is diagnosed by muscle biopsy.

Acquired Immunodeficiency Syndrome↗