AIMS To determine retrospectively the relative usefulness of electron microscopy and immunocytochemistry for tumour diagnosis; to monitor the influence of new antibodies and antisera on the use of these techniques in one laboratory. METHODS During 1980 to 1989 inclusive, 726 tumours were examined by electron microscopy, 862 by immunocytochemistry, and 286 by both techniques. The choice of tec...

In immunofluorescence microscopy (IFM), the repression of out of focus fluorescence signal is crucial in order to obtain high-resolution images. One option to acquire high vertical resolution (z-axis resolution) is to produce optical sections with a confocal microscope. The z-axis resolution usually obtained with confocal microscopy of biological samples is about 500 nm. Another option is to pr...

The localization of cytokinins in corn root tips was investigated using antibodies or antibody fragments directed against dihydrozeatin riboside and labeled with rhodamine or colloidal gold. Roots were sectioned at -30 degrees to -40 degrees for immunofluorescence or freeze-substituted in ethanol or acetone and embedded in plastic for electron microscopy. Meristematic cells surrounding the quie...

Two highly interesting papers related to osteoclastic activation in multiple myeloma were published in the December 15 issue of Blood.1,2 These studies were related to the imbalance of 2 molecules involved in the regulation of bone resorption: receptor activator of NF-kappaB ligand (RANKL) and osteoprotegerin. Croucher and colleagues2 found that mouse myeloma cells expressed RANKL mRNA and that...

The olfactory marker protein has been localized, by means of immunohistochemical techniques in the primary olfactory neurons of mice. The olfactory marker protein is not present in the staminal cells of the olfactory neuroepithelium, and the protein may be regarded as indicative of the functional stage of the neurons. Our data indicate that the olfactory marker protein is present in the synapti...

AIM To establish the diagnostic value of in situ hybridisation and the nested polymerase chain reaction (PCR) in detecting clinically relevant cytomegalovirus (CMV) infection in upper gastrointestinal biopsies from heart transplant patients. METHODS Test sensitivity and specificity for detection of CMV early gene RNA by in situ hybridisation and CMV intermediate early gene by PCR were establi...

Objective: The development of the human placenta depends on proliferation and differentiation trophoblastic cells. Deficiencies in functions are known to have a critical role progression placental pathologies such as preeclampsia. Therefore, this research, it was aimed evaluate responses cells tumor necrosis factor-α (TNF-α) mediated cellular stress. Materials Methods: In study, stress model se...

The sensitivity and specificity of immunocytochemistry were compared with those of non-isotopic in situ hybridisation (NISH) for the direct detection of human papillomaviruses in biopsy specimens. Four monoclonal antibodies raised to the capsid protein of HPV16 were less specific than NISH: all four reacted with lesions containing HPV33, and HPV18. Absolute discrimination of HPV types, therefor...