Publication: Pinocytotic vacuoles in human dental pulp capillaries
Authors
Lyroudia, K.I. ; Economou, L. ; Manthos, A. ; Zervas, P. ; Albanou, A. ; Foroglou, Ch.
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Publisher
Murcia : F. Hernández
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DOI
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info:eu-repo/semantics/article
Description
Abstract
Dental pulp capillaries were studied in
human. They were of the cantinuous type, with the
exception of a small number which were of the
fenestrated type, located in the vicinity of the
odontoblasts. A characteristic morphological peculiarity
was found in the endothelial cells. In places there was a
large quantity of multisized vacuoles. The vacuoles were
evidently of pinocytotic origin, and their content was
emptied into the extracapillary space. The initiation of
their formation was indicated by the creation of
cytoplasmic flaps, which could not be characterised as
typical pseudopodia, and which in cross sections
resembled microvilli. The flaps engulfed a quantity of
plasma and then, after bending over, their edge fused
with the cell, creating a vacuole. The vacuole, after
being moved abluminally, was emptied into the
pericapillary area by exocytosis. There was indication
that flaps created at the borders of the endothelial cells
(flanges) acted likewise, transporting vacuoles through
the intercellular spaces. Micropinocytosis, was a
distinctly different phenomenon, contributing, to a very
small degree, to the intracellular enlargement of the
vacuoles. It seems that this vacuolar mechanism of
transportation serves an augmented metabolic need of
the surrounding tissue.
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