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Titolo:
Immunohistochemical and ultrastructural age-related changes in rat lactotroph cells
Autore:
Console, GM; Jurado, SB; Petruccelli, M; Dumm, CLAG;
Indirizzi:
NatlaUniv La Plata, Fac Ciencias Med, Catedra Histol & Embriol B, RA-1900 L Natl Univ La Plata La Plata Argentina RA-1900 tol & Embriol B, RA-1900 L NatlLaniv La Plata, Fac Ciencias Vet, Serv Cent Microscopia Elect, RA-1900Natl Univ La Plata La Plata Argentina RA-1900 Microscopia Elect, RA-1900
Titolo Testata:
BIOCELL
fascicolo: 3, volume: 22, anno: 1998,
pagine: 197 - 205
SICI:
0327-9545(199812)22:3<197:IAUACI>2.0.ZU;2-T
Fonte:
ISI
Lingua:
ENG
Soggetto:
OLD FEMALE RATS; PROLACTIN CELLS; DOPAMINERGIC-NEURONS; PITUITARY-TUMORS; WISTAR RATS; SECRETION; HETEROGENEITY; HORMONE; PLASMA; GLAND;
Keywords:
lactotroph cells; ageing; pituitary immunohistochemistry; pituitary ultrastructure;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
32
Recensione:
Indirizzi per estratti:
Indirizzo: Console, GM NatlA-1900La Plata, Fac Ciencias Med, Catedra Histol & EmbriolB, CC 445, R Natl Univ La Plata CC 445 La Plata Argentina RA-1900 C 445, R
Citazione:
G.M. Console et al., "Immunohistochemical and ultrastructural age-related changes in rat lactotroph cells", BIOCELL, 22(3), 1998, pp. 197-205

Abstract

Ageing produces alterations in some functions of the hypothalamo-pituitaryaxis leading to sexually dimorphic changes in the prolactin (PRL)-secreting cells. Since quantitative morphological data of these age-associated alterations are scarce, we carried out a morphometric immunohistochemical assessment as well as an ultrastructural study of the PRL, cell population in male and female rats of different ages. Young (3-month-old), old (20-month-old), and senescent (31-month-old) Sprague-Dawley rats of both sexes were sacrificed by rapid decapitation, their pituitaries immediately dissected out and processed for both immunohistochemistry and electron microscopy. Analysis of different morphometric parameters revealed that the cell density (CD)and volume density (VD) significantly decreased with age in male rats. In females, while CD showed a significant age-related diminution when young rats were compared to old ones, this parameter increased in senescent animals. The VD presented higher values in senescent rats. When the data were compared between sexes, VD was found to be higher in females if old and senescent rats were considered. Finally, CD increased significantly in females when compared to males. The ultrastructure of the PRL cells from old and senescent animals of both sexes exhibited changes suggestive of an hyperstimulation state, with some prolactotrophs having the appearance of cells undergoing an involutive process. We conclude that ageing has a differential impacton the PRL. cells of male and female rats with respect to the immunohistochemical and ultrastructural features of that cell population.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 25/01/20 alle ore 18:51:00