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Biomedical subjects

A Cerri

Publications and source records attributed to A Cerri.

At least 127 records · Page 7Linked to original sources
PubMed1991

Proteus syndrome. Ultrastructural study of linear verrucous and depigmented nevi.

Proteus syndrome is a rare hamartomatous disorder characterized by multifocal overgrowths that can involve any structure of the body. Clinical manifestations include macrodactyly, hemihypertrophy, subcutaneous masses, exostosis, cerebroid thickening of palms and soles, and linear skin lesions. About 50 cases have been described, but the ultrastructural features of the linear skin lesions have not been characterized. We describe the clinical, histologic, and ultrastructural findings for a 30-year-old patient who had a mild form of Proteus syndrome with linear lesions characterized by a mixed pattern of hyperkeratosis and depigmentation. Light microscopy of the linear nevus showed acanthosis and hyperorthokeratosis. Electron microscopy revealed extensive vacuolation at the interface between melanocytes and keratinocytes, with large aggregations of densely packed granules in the intercellular space. Melanocytes showed only slight degenerative changes. An immunohistochemical study of the expression of epidermal growth factor receptors revealed no significant abnormalities.

Adult↗
PubMed1990

Expression of integrins in junctional and dystrophic epidermolysis bullosa.

Recently, monoclonal antibodies (MoAb) have been raised against a family of adhesive membrane receptors (R) for extracellular matrix molecules known as integrins. In order to ascertain whether these adhesive proteins are normally expressed in inherited epidermolysis bullosa (EB) dermal epidermal junction, we studied the reactivity of MoAb recognizing receptors for VLA-1 (R for unknown ligand), VLA-2 (R for collagen), VLA-3 (R for collagen, laminin, fibronectin), VLA-4 (R for unknown ligand), VLA-5 (R for fibronectin), VLA-6 (R for laminin), VNR alpha, and VNR beta (R for vitronectin) on cryostat skin sections from EB patients and normal controls and on cytospins of normal epidermal cell suspensions with indirect immunohistochemical methods. Two cases of junctional EB (EBj) (lethal and non-lethal), three cases of dominant dystrophic EB (EBdd), two cases of recessive dystrophic EB (EBdr), and two normal controls skin sections and cell suspensions entered the study. No significant modification of the distribution of these adhesive receptors was observed in junctional and dystrophic EB skin. Both in normal and EB specimens MoAb against VLA-2, VLA-3, and VNR alpha determinants showed reactivity with the total cytoplasmic membrane of basal keratinocytes and basement membrane zone. Interestingly, anti-VLA-6 MoAb was characterized by an intense linear staining of the dermal-epidermal junction with the same localization on the roof of the blisters in EBj, EBdd, and EBdr as bullous pemphigoid (BP) serum. On the basis of these results we suggest that anti-VLA-6 MoAb could be used instead of BP serum for immunohistochemical detection of the cleavage of blisters in EB.

Antibodies, Monoclonal↗
PubMed1989

Bone marrow monocytes in histiocytosis X acquire some phenotypic features of Langerhans cells in long term bone marrow cultures.

Bone marrow cells of a patient with Letterer-Siwe disease were cultured for three weeks in long-term bone marrow culture (LTBMC) conditions and examined at one-week intervals with a large panel of monoclonal antibodies by immunohistochemistry and by the immunogold transmission electron microscopy (immunoTEM) technique. Although at diagnosis the bone marrow showed a slight increase of monocytes with a normal phenotype, a rapid expansion of cells expressing CD1a and CD1c was observed already after 1 week of culture. A progressive increase in CD4, CD11b and CD11c expression was also observed. ImmunoTEM of cultured cells demonstrated that CD1a+ cells had macrophage-like morphology, and did not contain Birbeck granules. These findings indicate that bone marrow monocytes acquire some phenotypical features of Langerhans cells in LTBMC and support the hypothesis that these cells may derive directly from a bone marrow monocytic precursor.

Aged↗
PubMed1989

P53 and oncogenes expression in psoriasis.

Activity of p53, H-ras, c-myc and c-fos in psoriatic lesions was studied using monoclonal antibodies (MoAbs) performing a sensitive immunohistochemical method on frozen sections. Normal skin from surgery was used as control. Reactivity of p53, H-ras and c-myc is remarkable in psoriatic plaques but, in contrast, c-fos expression does not show differences compared to control skin. These findings led us to speculate about the importance of cellular oncogenes in the pathogenesis of psoriasis.

Antibodies, Monoclonal↗
PubMed1987

[Various aspects and problems in surgery of the parotid gland: experience in 70 cases].

The pathology and the relative surgical treatment, performed in all the swellings of the parotid gland observed in our clinic, are reported. Particularly the most important topics and problematics, both of short and long term, connected to the surgical therapy carried out, are described. Finally the actual diagnostic aspects and the necessity of an accurate preoperatory staging are discussed.

Female↗
PubMedDate not supplied

Recurrent proximal white subungual onychomycosis associated with a defect of the polymorphonuclear chemotaxis.

Proximal white subungual onychomycosis (PWSO) is a rare form of nail infection that occurs almost exclusively in immunocompromised patients. Initially, in several reports, PWSO was described in ARC and AIDS patients. Later this pattern of onychomycosis was observed in patients with renal transplants, who received immunosuppressive therapy, and recently in a woman with active systemic lupus erythematosus (SLE) treated with systemic steroid therapy. We report a case of recurrent PWSO in a woman affected by a defect of polymorphonuclear chemotaxis. The association between PWSO and a defect of neutrophil chemotaxis, not yet described in the literature, suggests a point of discussion about the role of polymorphonuclear leucocyte functions in the defense mechanisms of the host affected by dermatophytosis. In this report the close association between PWSO and an immunocompromised condition is once again described. For this reason the authors emphasize the importance of investigating the common and uncommon causes of immunodeficiency in all patients affected by PWSO.

Adolescent↗
PubMedDate not supplied

Synthesis and nootropic activity of 2-oxo-1-pyrrolidinesulfonic acid derivatives.

The synthesis of a series of 2-oxo-1-pyrrolidinesulfonic acid derivatives, as potential nootropic agents, is reported. Such compounds were designed to have chemical and physico-chemical properties intermediate between 2-oxo-1-pyrrolidineacetamides (e.g. oxiracetam) and 1-acyl-2-pyrrolidinones (e.g. aniracetam). The ability of these compounds to counteract the ECS-induced amnesia in mice was assessed in a one trial, step through, passive avoidance paradigm. Whilst oxiracetam and aniracetam confirmed their antiamnestic action, none of the title compounds showed a statistically significant activity.

Animals↗
PubMedDate not supplied

[Seronegative hashitoxicosis in patient with rheumatoid arthritis].

Hashimoto's thyroiditis is known to occur in conjunction with other autoimmune disorders including rheumatoid arthritis. We describe herein a patient with long before-onset seronegative rheumatoid arthritis who developed Hashimoto's thyroiditis and hyperthyroidism without serologic evidence of thyroglobulin, microsomal and/or anti-TSH receptor antibodies. The occurrence of these autoimmune diseases in individual patients suggests an imbalance in immune function which effects more than one organ system. The predisposition to this spectrum of autoimmune diseases may be genetically determined, with specific HLA haplotypes associated with a variety of autoimmune diseases. The case of this patient provides the demonstration that intrathyroidal lymphocytes in autoimmune thyroid disorders and T-lymphocytes in the synovium are responsible for mediating the glandular destruction in Hashimoto disease and intraarticular lesions in rheumatoid arthritis, since the disorders can exist without evidence of a systemic immune response.

Arthritis, Rheumatoid↗