Post-natal maturation of acinar cells of the guinea pig pancreas: an ultrastructural morphometric study (2002)
- Autores:
- Autores USP: ASSIS, GERSON FRANCISCO DE - FOB ; TAGA, RUMIO - FOB
- Unidade: FOB
- Assuntos: MORFOMETRIA; PÂNCREAS; CÉLULAS
- Idioma: Inglês
- Resumo: The morphological maturation of the acinar cells of the guinea pig pancreas during post-natal development was characterized morphometrically by determining the intracytoplasmic accumulation of rough endoplasmic reticulum (RER) and zumogen granules. The following results were obtained for the period analysed, i.e., from 2 to 70 days of post-natal life: (a) tha acinar cell volume increased by 210% (P<0.01); (b) the mostly cisternal RER occupied more than 30% of the cytoplam at any age studied and their total volume and surface in the cell were increased by 300 and 534% (P<0.01), respectively; (c) maturation in the morphological pattern of the RER was observed; (d) the mean number of zymogen granules per cell increased from 261 at 2 days to 422 at 70 days (P<0.01), while their mean diameter increased from 0.52 to 0.94 um (P<0.01) during the same period; (e) these increases in franule number and size were responsible for a 500% (P<0.01) increase in total volume from 2 to 70 days and for a 304% increase (P<0.01) in total surface from 2 to 35 days; (f) the RER and the zymogen granules together occupied 44, 54, 55 and 57% of the cytoplasm at 2, 14, 35 and 70 days of age, respectively. We conclude that although the pancreatic acinar cells of the guinea pig are morphologically well differentiated at 2 days of age, with the cytoplasm already showing a large amount of RER and zumogen granules, They are still immature. Morphological maturation of the acimar celloccurs during the first months of post-natal life and is characterized by a substantial gain in cell volume and intracytoplasmic accumulation of RER and zymogen granules, which significantly increase of both their absolute volume and total surface, with a higher growth rate being observed during the period from 2 to 14 days of post-natal life
- Imprenta:
- Fonte:
- Título do periódico: Anatomia, histologia, embruologia
- ISSN: 0340-2096
- Volume/Número/Paginação/Ano: v. 32, n.1, p. 36-41. Feb. 2002
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ABNT
ASSIS, Gérson Francisco de et al. Post-natal maturation of acinar cells of the guinea pig pancreas: an ultrastructural morphometric study. Anatomia, histologia, embruologia, v. 32, n. 1, p. 36-41. Feb. 2002, 2002Tradução . . Acesso em: 26 abr. 2024. -
APA
Assis, G. F. de, Cestari, T. M., Sesso, A., & Taga, R. (2002). Post-natal maturation of acinar cells of the guinea pig pancreas: an ultrastructural morphometric study. Anatomia, histologia, embruologia, 32( 1), 36-41. Feb. 2002. -
NLM
Assis GF de, Cestari TM, Sesso A, Taga R. Post-natal maturation of acinar cells of the guinea pig pancreas: an ultrastructural morphometric study. Anatomia, histologia, embruologia. 2002 ; 32( 1): 36-41. Feb. 2002.[citado 2024 abr. 26 ] -
Vancouver
Assis GF de, Cestari TM, Sesso A, Taga R. Post-natal maturation of acinar cells of the guinea pig pancreas: an ultrastructural morphometric study. Anatomia, histologia, embruologia. 2002 ; 32( 1): 36-41. Feb. 2002.[citado 2024 abr. 26 ] - Estudo estereológico da glândula parótida do rato durante as 24 horas de um dia de verão
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