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S Dolapchieva

Publications and source records attributed to S Dolapchieva.

25 records · Page 2Linked to original sources
PubMed1975

On some aspects of schwann-sheath development and the possible role of their desmosome-like structures.

An investigation was made of ventral and dorsal spinal roots (L7 and S1) in the postnatal life of the rabbit. The development of the Schwann sheath of the nerve fibers was studied and correlated with the distribution and morphological characteristics of the desmosome-like structures connected with them. The association of these structures with constituents of the endoplasmic granular and smooth-surfaced reticulum of the Schwann cell is pointed out. The possibility is discussed of a direct relationship between the inner mesaxons, as well as along the length of the peripheral myelin lamellae. In addition, it is suggested that in some cases already existing membrane formations of the adjacent cytoplasm become attached to the developing Schwann sheaths, which results in branching mesaxons or "poli-mesaxonal" nerve fibers.

Animals↗
PubMedDate not supplied

A freeze-etch study of the central myelin.

The intramembranous organization of the interparanodal myelin lamellae in CNS was investigated by means of the freeze-etching technique. The density of the IMPs is about equal on both P- and E-fracture faces of every myelin sheath but varies between the myelin sheaths. The morphology of the myelin tight junctions was also described. The nature of the IMPs and the functional significance of their mode of distribution were discussed.

Animals↗
PubMedDate not supplied

A freeze-etch study of the central myelin.

The intramembranous organization of the interparanodal myelin lamellae in CNS was investigated by means of the freeze-etching technique. The density of the IMPs is about equal on both P- and E- fracture faces of every myelin sheath, but varies between the myelin sheaths. The morphology of the myelin tight junctions is also described. The nature of the IMPs and the functional significance of their mode of distribution are discussed.

Animals↗
PubMedDate not supplied

Neuronal Na+, K+-ATPase in the peripheral nerve fibers.

ATPase activity was localized by means of Wachstein-Meisel's method in rat sciatic nerve fibers. Using controls with ouabain, the presence of alpha + (neuronal) Na+, K+-ATPase was examined. The enzyme occurs in the ATPase reaction of the myelin-forming membranes, axoplasm and Schwann cell cytoplasm. Its presence in the Schwann cell plasma membrane is only admittable. The ATPase activity of the compact myelin and axolemma was exclusively of alpha + type of Na+, K+-ATPase.

Animals↗