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Biomedical subjects

E Repciuc

Publications and source records attributed to E Repciuc.

29 records · Page 2Linked to original sources
PubMedDate not supplied

Alkaline phosphatase positive lymphocytes (APPL) in man.

APPL are located in human lymph nodes in almost the same sites as in the laboratory rodents studied up to date. This means that their echotaxis is almost identical and may be an old phylogenetic heritage. But APPL may be found in man until puberty only; thereafter they disappear from all the lymphatic organs. At the age of 40 their depletion is perfected. This evolution of APPL is parallelized by thymus involution. Therefore we may strengthen the conclusion that APPL belong to the T-dependent lymphocytes and that all lymphocytes which really have visited the thymus acquire the enzymatic marker.

Adult↗
PubMedDate not supplied

Differentiation of human anterior hypophysial cells during fetal life.

This paper deals with cell differentiation in the anterior hypophysis of the human fetus, as may be stated by electronmicroscopy. In the 9 cm fetus the greater number of cells are devoid of granules; this was the reason for their being considered as nondifferentiated cells. A small number of cells however contain granules which vary from cell to cell in number and size and may be considered as cells with different functions. Usually the granules secreted within the same cell have very close diameters. The number of such cells increases with the age of the fetus; thus, in 170 mm fetal length there remain very few nondifferentiated cells. Some cells have their granules located centrally, while in others they are closer to the cell membrane, suggesting that the product of cell secretion is extruded in the nearby lumen of capillaries. The shape of the cells, their location, as well as the features of the cell organelles are similar to those described for adults, but in the fetus they are proportionally fewer. The electronmicroscopic pattern does not seem to be a sufficient criterion for the specification of the type of cells, except ACTH-MSH secreting cells.

Cell Count↗
PubMedDate not supplied

A tract arising from the substantia nigra and covering the surface of the crus cerebri (pes peduncili).

The authors succeeded in impregnating very selectively with the short Golgi method a tract arising from the substantia nigra (s.n.) and covering the surface of crus cerebri. Angio- and glioarchitectonies of the tract are described together with nerve cells penetrating with their dendrites or totally sunk into the tract, whose function may be a feed-back loop to the s.n.

Blood Vessels↗
PubMedDate not supplied

The mesencephalic nucleus of the trigeminus in man.

If the mesencephalic trigeminal nucleus were built up uniquely from unipolar, big cells, its extension in man would be greater than hitherto admitted: on both sides of the mesencephalic tract, mingled with cells of the locus ceruleus, and in the superior medullary velum. In all sites, beside unipolar cells there are always a few bi- and multipolar cells in the constitution of the mesencephalic trigeminal nucleus. The big cells of this nucleus are not perfectly spherical, as often suggested, but always somewhat flattened. Many synaptic boutons lie on their perikarion and their unique process.

Cerebral Ventricles↗
PubMedDate not supplied

The suspensory muscle of the duodenum.

The suspensory muscle of the duodenum continues the muscular layers of the duodenum, which is consequently surrounded on its mesenteric border only by the muscularis mucosae. Between the muscle bundles of the suspensor there is much loose connective and adipose tissue. Microganglions of no more than 90 cells may be found between the muscle bundles of the suspensor. In their superior part, the muscle bundles have connective sheaths, which are continuous with the adventitia of the aorta and celiac trunk. It is most probable that the suspensor acts like a sphincter and is innervated contrarily to the duodenum.

Adult↗
PubMedDate not supplied

The development of the hypothalamo-hypophysial portal system in human fetus.

In the earliest stages of development of the nervous system, the hypophysial stalk has a horizontal disposition (having, above the hypothalamus and below the anterior lobe of the hypophysis, a group of cells placed in the sella turcica). The stalk becomes vertical in the VI--VII month of fetal life. Until the stage corresponding to the length of 92 mm vertex--coccis of the fetus, few blood vessels are to be found in this region; they follow the stalk's direction. These vessels originate from a vascular network which lies in the post-tuberal region being also considered the origin of a "special" kind of vessel observed very early in the hypophysis development. The veins can be found later at the 140 mm vertex-coccis fetus. Their structure is much like the structure of the portal vessels in the adult. At their proximal end their aspect can be referred to as an anastomotic arterio-venous system. After 7 months of development the vessels resemble their adult form, being however less numerous.

Female↗