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- W1969940765 abstract "Previous reports indicate that gonadotrope cells of the porcine pituitary gland can be separated into three subpopulations of low- (1.049 g/cm3), middle- (1.062 g/cm3) and high- (1.087 g/cm3) density in a continuous Percoll density gradient. The aim of this work was to study the hormonal storage patterns and morphological features of these subpopulations at three representative ages of the postnatal development: neonatals (30-day-old animals), prepubertals (5-6-month-old animals) and matures (16-18-month-old animals). The low-density subpopulation, present at the three ages studied, was mainly composed of bihormonal LH/FSH cells in neonatal and monohormonal LH cells in prepubertal and mature animals. On the other hand, middle- (only present in prepubertal and mature animals) and high-density subpopulations (only present in neonatal and prepubertal animals) were mainly composed of bihormonal LH/FSH gonadotropes. In ultrastructural terms, these subpopulations exhibit a correlation between density and morphology irrespective of the animal's age. The low-density subpopulation was composed of poorly granulated cells with highly developed biosynthetic machinery (rough endoplasmic reticulum and Golgi complex), while high-density cells were of opposite morphology, with a highly granulated cytoplasm and poorly developed rough endoplasmic reticulum and Golgi complex. The middle-density subpopulation was composed of poorly granulated cells with scarcely developed biosynthetic machinery. In conclusion, these results indicate that porcine gonadotrope cells during postnatal development are composed of three subpopulations of different hormonal storage patterns and morphology. The presence of these subpopulations at the different stages of postnatal development strongly suggests that their proportions may play a major role in the endocrine control process." @default.
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- W1969940765 date "1993-11-01" @default.
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- W1969940765 title "Hormonal storage patterns and morphological heterogeneity of porcine gonadotrope cells during postnatal development" @default.
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- W1969940765 doi "https://doi.org/10.1016/0303-7207(93)90210-b" @default.
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