Our results are particularly relevant in view of new
experimental techniques that enable the parallel recording of spiking activity from a large number of neurons, an appropriate interpretation of which is hampered by the currently limited understanding of structure-dynamics relations MK-5108 in complex networks.”
“Objective
To establish the cytologic and immunocytochemical features of lymphangioleiomyomatosis (LAM) cell clusters (LCCs) and to clarify its diagnostic significance for LAM.
Study Design
We evaluated 17 samples of LAM-associated chylous effusions from 13 patients with LAM. We performed Papanicolaou staining and immunocytochemistry for muscular antigens, melanoma-related antigens, female hormone receptors and markers fir lymphatic endothelial cells (LECs).
Results
The cytologic features of LCCs were a well-organized, globular cluster consisting of LAM cells LY2835219 enveloped by LECs. The LAM cells were observed to form a tightly cohesive core and had a moderate nuclear/cytoplasmic ratio. Thee are distinct characteristics from cancer cell clusters. Immunocytochemical
examinations revealed the LAM cells to be positive for muscular antigens, melanoma-related antigens and progesterone receptor, but only 2 of 7 specimens were positive for estrogen receptor. The surface monolayer cells were confirmed to be immunopositive for various LEC markers. Ultrastructural study confirmed that LCCs were covered by LECs.
Conclusion
LCCs
were detected in all LAM-associated selleck screening library chylous effusion samples. The cytologic and immunocytochemical examinations of chylous effusions are thus considered to have diagnostic significance for LAM that may therefore enable patients to avoid undergoing such invasive tests as lung biopsies. (Acta Cytol 2009;53:402-409)”
“Background: N-propionyl-4-S-cysteaminylphenol (NPr-4-S-CAP) is selectively incorporated into melanoma cells and degrades them. However, it remains unclear whether NPr-4-S-CAP can induce cell death associated with the induction of host immune responses and tumor suppression in vivo.
Objective: To examine the molecular mechanism of NPr-4-S-CAP-mediated cytotoxicity toward melanoma cells and to test whether NPr-4-S-CAP can suppress transplanted primary and secondary B16F1 melanomas.
Methods: Cytotoxicity and apoptosis of melanoma cells were assessed by cell counting, flow cytometry, and detection of reactive oxygen species (ROS) and apoptotic molecules. NPr-4-S-CAP-associated host immunity was studied using a B16F1 mouse melanoma model through the application of CD4- and CD8-specific antibodies and tetramer assay.
Results: NPr-4-S-CAP suppressed growth of pigmented melanoma cells associated with an increase of intracellular ROS, activation of caspase 3 and DNA fragmentation, suggesting that NPr-4-S-CAP mediated ROS production, eliciting apoptosis of melanoma cells.