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Biomedical subjects

C Soler

Publications and source records attributed to C Soler.

136 records · Page 8Linked to original sources
PubMedDate not supplied

Maturation of human spermatozoa (from selected epididymides of prostatic carcinoma patients) with respect to their morphology and ability to undergo the acrosome reaction.

Spermatozoa were recovered from three regions of the epididymis of six prostatic carcinoma patients. After washing and incubating for 3 h in Ham's F-10 medium, with or without 5 microM A23187 for the last 30 min, spermatozoa were tested for vitality by hypotonic swelling and permeated with methanol to detect the acrosome with peanut agglutinin. Whereas the extent of spontaneous acrosome reactions was similar for spermatozoa from all regions of the duct, 17 and 28% of spermatozoa from the corpus and cauda epididymidis respectively, responded to stimulation by A23187 with acrosome reactions but there was no stimulation by A23187 of spermatozoa from the efferent ducts. The percentage of morphologically normal spermatozoa increased stepwise towards the distal regions, with abnormalities being mostly enlarged heads in more proximal regions; they were largely absent from the cauda epididymidis. Sperm head swelling was similarly observed in cynomolgus monkey spermatozoa from the caput epididymidis but not the more distal regions. These forms were not observed when spermatozoa were fixed before smearing, indicating that they were artefacts of sperm preparation. The changes in the susceptibility of non-fixed epididymal spermatozoa to produce morphological artefacts and the gain in their acrosomal response to ionophore demonstrate maturational changes of spermatozoa in the human epididymis.

Acrosome↗
PubMedDate not supplied

[Tinea capitis: sample surveys among school doctors and dermatologists in the Paris suburbs].

BACKGROUND: Subsequent to detection of several cases of anthropophilic tinea capitis, we wanted to know whether the legal decree requiring eviction from school and an epidemiology survey in the children community or the family is implemented properly. METHODS: Two sample surveys were carried out among 50 school doctors from the Hauts-de-Seine department and 110 dermatologists working the Paris suburbs. RESULTS: Eviction from school was rare and not based on the type of dermatophytes (anthropophilic or zoophilic agent). Likewise, epidemiology survey was neglected, often being solely clinical for other family members. Systematic sampling in the children community or in the family was very exceptional. DISCUSSION: Despite the rise in the number of cases of anthropophilic tinea capitis in Paris suburbs, the decree is not often implemented. Dermatologists would appear to be responsible for this situation, especially in case of M. langeronii, which is very contagious in nursery school.

Child↗
PubMedDate not supplied

Interest of PS100 assay when (99m)Tc sestamibi scintigraphy failed to identify lymph node metastases of melanoma.

The study evaluated the contribution of serum PS100 assay to the detection of lymph node metastases during the follow-up of patients previously treated for a malignant melanoma, in addition to (99m)Tc sestamibi (MIBI) scintigraphy and investigation for gene MDR1, in order to detect chemoresistance phenomena. The study included 37 patients with a clinically questionable lymph node around basin lymphatic areas of the previously surgically-treated malignant melanoma. The sensitivity and specificity of PS100 assay were 91% and 86.5%, respectively. The sensitivity and specificity of MIBI scintigraphy were 95% and 85%, respectively. Overexpression of gene MDR1 was observed in six cases. In the event of negative scintigraphic findings, the concomitant analysis of PS100 levels and the scintigraphic result enabled the metastatic MDR+ patients to be distinguished from the non-metastatic patients. PS100 assay may therefore be proposed for the follow-up of malignant melanoma.

ATP Binding Cassette Transporter, Subfamily B, Mem↗
PubMedDate not supplied

Correlation of 99mTc-MIBI brain spect (functional index ratios) and survival after treatment failure in malignant glioma patients.

AIM: This preliminary study was conducted to determine the association between 99mTc-SESTAMIBI (MIBI) brain SPECT and survival in malignant glioma patients after treatment failure. MATERIALS AND METHODS: Twenty-five malignant glioma patients with clinical deterioration were studied. Tomoscintigraphy was performed 15 minutes after intravenous injection of 1110 Mbq MIBI. The images were obtained from a dual head gamma camera using fan beam collimators. Transverse, coronal and sagittal views were reconstructed. Maximum uptake of MIBI in the lesion was expressed as a ratio to that in the controlateral hemisphere. RESULTS: A MIBI uptake was found in all 25 patients. This uptake was correlated to tumour recurrence proved by histological fragments and/or the rapid fatal evolution of these patients. From scintigraphic parameters, two groups of patients were noted. Group 1 (20 patients) had a significantly better survival time (8.25 months) than did Group 2 (5 patients) (2.9 months). Tumour volume predicted survival (group 1 vs group 2, p < 0.0006). A significant correlation between the tumour/background ratio and survival time for each group was observed. CONCLUSION: A correlation between functional index ratios and the time of survival of patients was noted. The functional index ratios of brain SPECT are in accordance with the potential aggressiveness of the recurrent malignant glioma.

Adult↗
PubMedDate not supplied

Primary B cell lymphoma of the rectum in a patient coinfected with HIV-1 and HTLV-I.

This report describes a clinical case of a large cell, immunoblastic plasmacytoid malignant B-cell lymphoma of the rectum in an AIDS patient coinfected with HTLV-I. The malignant cells showed clonal genetic rearrangement of the HC (JH) and LCK genes. Infection by EBV was demonstrated serologically and with slot blots using genomic DNA of the cancer cells. Southern blot analysis with DNA extracted from the lymphoma cells were negative for HTLV-I. The patient received seven cycles of VACO-B which induced complete but transient clinical remission of the tumor. The final outcome of the patient is unknown.

Acquired Immunodeficiency Syndrome↗
PubMedDate not supplied

Morphological and quantitative study of multinucleated bodies appearing in rat seminiferous tubules after bilateral caput epididymectomy.

Adult Wistar rats were bilaterally caput epididymectomized and the effects on testicular germinal epithelium and formation of multinucleated bodies were studied and quantified at 2, 4, 7, 14, 21, and 28 days after surgery. Sham-operated and bilaterally efferentectomized animals served as controls. No alterations were found in sham-operated animals. Efferentectomized animals showed a progressive alteration of the seminiferous tubule epithelium and a (very occasional) presence of multinucleated bodies. Epididymectomized animals presented a progressive degeneration of the germinal epithelium, which was almost complete at 28 days. This epithelial degeneration was accompanied by the formation of multinucleated bodies from germinal cells, whose number and characteristics varied with the experimental interval. The multinucleated bodies described here resemble the multinucleated cells mentioned by other authors. They do not seem to be cellular; instead, they appear to be debris, since electron microscopic observations do not reveal a plasma membrane.

Animals↗
PubMedDate not supplied

[Hepatosplenic and kidneys candidasis complicating an acute myeloblastic leukemia. A case treated with voriconazole and caspofungin].

We report the observation of hepato-splenic and kidneys candidiasis complicating the chemotherapy of a myeloblastic leukemia (LAM5b). Following the lack of effectiveness of a first line treatement, using amphotericine B liposomale and 5-fluorocytosine, implementation of an association of new molecules, a triazole of second generation (voriconazole) and an echinocandine (caspofungine) has allowed a successful result.

Adult↗
PubMedDate not supplied

99mTc-MIBI uptake in a primitive leptomeningeal melanoma.

Primitive leptomeningeal melanoma is a rare and aggressive condition. The authors report on a case of primitive leptomeningeal melanoma imaged with 99mTc-Sestamibi (MIBI). There was an intense accumulation of the radiotracer in the frontal and parietal leptomeningeal regions and even after injections of gadolinium the MRI continued to reveal a cystic image of the brain. In view of the diagnosis, MRI demonstrated only limited usefulness. On the other hand, this case highlights the important role of MIBI for the imaging of malignant tumors.

Female↗
PubMedDate not supplied

[Numerical analysis of western blot digitalized images. The case of HIV].

The present work explores the use of image digitalization of western blot (WB) aiming to extract more information about the humoral immune response of human immunodeficiency virus (HIV) infected individuals, and to analyze obtained data in a multivariate manner. The digitalization and analysis of WB images was performed on 115 sera. Images were analyzed either qualitatively: dendogram and principal component analysis (PCA) or quantitatively: PCA of the total bands, taking either the antigens, which belong to the virus, or only those which do not. Results show the feasibility of mechanical diagnosis of a large number of WB images. The dendogram and the qualitative PCA satisfactorily separated white images, images with less than four bands, and images with more complex patterns. Quantitative analysis, which keeps more information, separated the images of negative, undetermined and positive diagnosis quite precisely. It was also found that the positive images with complex patterns of antigen recognition correlate better with asymptomatic individuals. Image analysis also revealed various other bands in WB which do not seem to correspond to viral proteins and could represent autoantigens or crossed antigens between HIV and humans which may cause autoimmunity. Digital analysis of WB images is thus demonstrated to be of great usefulness in the diagnosis and of potential great interest in following the evolution and exploring the pathogenesis of AIDS.

AIDS Serodiagnosis↗