[Lipids at the stages of early osteogenesis in human long tubular bones]

In 240 long tubular bone anlagen (LTBA) of extremities in 40 human embryos and prefetuses at the age of 6-12 weeks of the prenatal development the investigation has been performed concerning localization, dynamics of contents and spectrum of neutral lipids and phospholipids. Lipids are stained with Sudan III and IV, phospholipids-with Sudan black with corresponding control extractive methods and quantitative estimation of these substances values. The material for electron microscopical investigation of the lipids is treated according to the method, that preserves their safety. The spectrum of lipids and phospholipids in the LTBA is studied by means of the thin layered chromatography method. The data of the histochemical investigation and chromatography demonstrate decreasing contents of neutral lipids with the gradient from the zone of the preserved cartilage up to the ossification zone of the epiphyseal cartilage of the LTBA in the human embryos and prefetuses. Increased concentration of phospholipids and complication of their spectrum is noted in the areas of intensive deposits of calcium salts. An essential role of the substance of lipid origin is supposed in ossification and mineralization of the human LTBA.