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We have developed a sensitive three-step indirect immunofluorescence method to identify individual rat cells that produce cytokines including IL-1β, IL-2, IFN-γ and TNF-α. Cultured rat splenocytes were polyclonally activated to cytokine synthesis by mitogens such as lipopolysaccharide or a...
5-Bromo-2′-deoxyuridne (BrdU) and 3 H-thymidine label mitotically active cells, but they do not adequately mark the progeny of dividing cells for long term study. An alternative method is to label cells using the replication-defective CXL retroviral vector, which carries the lacZ gene encoding...
We describe histochemical techniques for detecting DNA within the osteocytic lacunae of ancient bones. The bones examined were fragments of femurs from two human individuals found in the Pompeian C. I. Polybius house and fragments of metacarpals from two horses ( Equus sp.) found in the Pompeian...
We have assessed the utility of an intracellular fluorochrome, 5-(and-6)-carboxyfluorescein diacetate succinimidyl ester (CFSE), as a tracking label for human intervertebral disc cells in vitro. Although 5 JJIM provides adequate intracellular labeling for whole cell fluorescent microscopic...
The bis-benzimidazole compound nuclear yellow (NY) belongs to the same chemical family as the DNA binding fluorochromes Hoechst 33258 and Hoechst 33342. Spectroscopic studies of NY alone and in the presence of calf thymus DNA show high DNA binding affinity and behavior similar to the Hoechst...
Most stains for acidic mucins are time-consuming to prepare and have poor stability. Zirconyl hematoxylin is easily prepared and works for a year or more. It is made by adding 5 ml freshly-made 0.1% aqueous sodium iodate, 400 mg zirconyl chloride oc-tahydrate, and 40 ml 25% aqueous glycerol, in...
We compared the staining performance, dye content, solubility, and visual absorption maximum of two batches of alcian blue pyridine variant and of five batches of alcian blue 8GX (C.I. 74240). Whenever possible, we also compared results to those obtained with the same dye batches produced at an...
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