Cristiane Leal dos Santos Cruz

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Pyroglutamate aminopeptidase II is a highly specific membrane-bound ectopeptidase proposed to inactivate thyrotropin releasing hormone (TRH) in brain extracellular space. Its activity was measured in primary cell cultures of fetal brain in an attempt to define its cellular localization. Enzyme activity was detected in hypothalamic or cortical cell membrane(More)
Ligation of the purinergic receptor, P2X7R, with its agonist ATP has been previously shown to inhibit intracellular infection by chlamydiae and mycobacteria in macrophages. The effect of P2X7R on chlamydial infection had never been investigated in the preferred target cells of chlamydiae, cervical epithelial cells, nor in vaginally infected mice. In this(More)
Primary cultures of hypothalamic cells maintained in the presence of serum were either kept with homologous conditioned medium (CM) (i.e. only half of the medium was removed at each medium change) or without (total medium change). In cultures with homologous CM, TRH levels were increased. The effects of CMs from various intervals of the primary culture were(More)
Intraneuronal peptide regulatory mechanisms are still poorly understood. The cytosolic enzymes prolyl endopeptidase (EC 3.4.21.26) and pyroglutamyl peptidase I (E.C.3.4.19.3) degrade both TRH and LHRH. Previous studies from this laboratory have not supported a role for these enzymes in the control of TRH levels. These studies have now been extended to cell(More)
The objective of this study was to evaluate the effects of supplying the by-product of peach-palm (Bactris gasipaes) on performance and characteristics of carcass and non-carcass components of feedlot lambs. Twenty Santa Ines lambs of 150 days average age and 22.4 ± 3.4 kg body weight were confined in individual pens. A completely randomized design was(More)
In order to determine the pathway of extracellular metabolism of the thyrotropin releasing hormone (pyroglu-his-proNH(2)) in brain, the topographical organization of pyroglutamate aminopeptidase II on the plasma membrane was investigated. Its activity was only slightly increased when intact brain synaptosomes were lysed by osmotic shock or detergent(More)
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