A pigmented acral lesion.
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Biopsy, Needle↗
Biomedical subjects
L Laino
Publications and source records attributed to L Laino.
In vitro activity of tea tree oil against Candida albicans mycelial conversion and other pathogenic fungi.
The antifungal activity of Melaleuca alternifolia Maiden (Myrtaceae) essential oil against yeasts (Candida spp., Schizosaccharomyces pombe, Debaryomyces hansenii) and dermatophytes (Microsporum spp. and Tricophyton spp.) is reported. We focused on the ability of tea tree oil to inhibit Candida albicans conversion from the yeast to the pathogenic mycelial form. Moreover we carried out broth microdilution test and contact tests to evaluate the killing time. M. alternifolia essential oil inhibited the conversion of C. albicans from yeast to the mycelial form at a concentration of 0.16% (v/v). The minimum inhibitory concentrations (MICs) ranged from 0.12% to 0.50% (v/v) for yeasts and 0.12% to 1% (v/v) for dermatophytes; the cytocidal activity was generally expressed at the same concentration. These results, if considered along with the lipophilic nature of the oil which enables it to penetrate the skin, suggest it may be suitable for topical therapeutic use in the treatment of fungal mucosal and cutaneous infections.
Anti-Infective Agents, Local↗
Improved radioimmunolocalization of human tumor xenografts following subcutaneous delivery of monoclonal antibodies.
The localization of a radiolabeled murine monoclonal antibody reactive with choriocarcinomas to human choriocarcinoma xenografts following intravenous and subcutaneous injection was evaluated by gamma scanning and tissue sampling. Tumor xenografts were established in the popliteal node region of athymic nude mice after repeated innoculations of the hind foot pads with BEWO choriocarcinoma cells. In dual label specific antibody studies, tumor/non tumor uptake ratios following subcutaneous (resulting in considerable intralymphatic uptake) injection of 131I-5F9.3 were significantly higher than those achieved post simultaneous intravenous injection of 125I-5F9.3. Double label experiments with 131I-5F9.3 and a nonspecific antibody, 125I-UPC-10, following subcutaneous injection, demonstrated that the high localization to popliteal region tumors was largely due to antibody specificity. Gamma scans following subcutaneous antibody administration of specific antibody to tumor bearing animals showed tumors soon after subcutaneous injection, at times earlier than those typically seen following intravenous delivery. Similar subcutaneous injections showed little normal nodal uptake in BALB/c control animals on gamma scans. No correlation was seen between tumor localization by specific antibody between the intravenous and intralymphatic routes, implying a difference in the mechanisms of tumor uptake of antibody by these two routes. The subcutaneous approach to antibody delivery offers advantages over intravenous delivery in tumors of human origin, including higher tumor/non tumor ratios and earlier imaging times. This was true even though these tumors were many times larger than normal lymph nodes. This subcutaneous delivery advantage should be exploitable in imaging nodal metastases of human tumors.
Animals↗
A semi-automated fluorescent (SAF) assay using viable, whole cells for screening hybridoma supernatants.
In the production of monoclonal antibodies, a rapid, sensitive, accurate assay is needed for the critical step of screening. We report the modification of an assay using viable whole cells for screening hybridoma supernatants. The modified assay uses fluorescent second antibodies for detection and has been adapted to an instrument capable of automating a number of assay steps. The modified assay is compared to a dot radioimmunoassay developed and used in our laboratory. The fluorescence assay is highly sensitive but shows more background effect, especially in samples with high protein content, such as ascites. The automated fluorescence assay is very rapid, capable of completing an assay in less than 90 min, and can be performed with minimal operator involvement. The assay was performed successfully with several different antibodies and cell types. This screening procedure should be especially useful for laboratories with large numbers of fusions to evaluate.
Antibodies, Monoclonal↗
Familial occurrence of nevus sebaceus of Jadassohn: another case of paradominant inheritance?
We describe two sibs (a boy and a girl) suffering from linear nevus sebaceus of Jadassohn. The parents are not affected. This rare pattern of familial occurrence prompts us to suggest that these sibs represent a case of paradominant inheritance of a mosaic disorder.
Child↗
Genital porokeratosis.
We report on a negroid male suffering from porokeratosis of the scrotum. Porokeratosis in the genital area is rare, as is its occurrence in negroid people. In our patient, we found an asymptomatic non-HIV associated immunosuppression. In this case, the disease might be called porokeratosis of Mibelli. The diagnosis should be suspected in patients not belonging to one of the classical at-risk ethnical groups if the skin lesions seem typical.
Adult↗