INVESTIGADORES
BARBEITO Claudio Gustavo
artículos
Título:
Paneth cells: histochemical and morphometric study in control and Solanum glaucophyllum intoxicated rabbits
Autor/es:
ZANUZZI CN; FONTANA PA; BARBEITO CG; PORTIANSKI EL; GIMENO EJ
Revista:
EUROPEAN JOURNAL OF HISTOCHEMISTRY
Editorial:
Pavia
Referencias:
Lugar: Universita di Pavia; Año: 2008 vol. 52 p. 93 - 100
ISSN:
1121-760X
Resumen:
The intestinal epithelium has a critical roll in host defence.
One specialised cell type involved in this function is the
Paneth cell, which secretes many substances with antimicrobial
properties in response to different stimuli. Under pathological
conditions, changes in the Paneth cell number, morphology
and location as well as in granule number, morphology
and composition have been reported.
In the normal animal, 1,25-dihydroxyvitamin D3 participates
in the maintenance of mineral homeostasis, immunomodulation
and cell proliferation and differentiation. Solanum
glaucophyllum, a calcinogenic plant containing high levels of
1,25-dihydroxyvitamin D3, is responsible for a condition
known as enzootic calcinosis in ruminants, characterised by
loss of body condition and mineralization of soft tissues.
Using and established rabbit model, this study analyses the
changes that rabbit Paneth cells undergo during intoxication
with S. glaucophyllum. Male New Zealand white rabbits were
experimentally intoxicated with S. glaucophyllum for 15 or
30 days. Lectin, immunohistochemical and morphometric
studies were carried out on Paneth cellsfrom samples of
jejunum. SBA, DBA and WGA lectins bound to Paneth cellsgranules
in both normal and intoxicated rabbits, with more
heterogenity in the labelling of granules from intoxicated rabbits.
Paneth cellsin both groups were immunonegative for
lysosyme. A time and dose-dependent increase in the size
and number of Paneth cellswas found in both intoxicated
groups.We suggest that the changes described in these cells
may be directly or indirectly induced by S. glaucophyllum
intoxication.