[Effects of neo-kyotorphin and delta sleep-inducing peptide on the rectal temperature in rats in the norm, during hypothermia and self-warming].
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Animals↗
Biomedical subjects
P E Povilaĭtite
Publications and source records attributed to P E Povilaĭtite.
[Recombinations of neocortex ultrastructure in hibernating animals during adaptation to hypothermia].
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Animals↗
[The electrophysiological and ultrastructural aspects of the effect of increased oxygen pressure on the sensorimotor cortex of rats].
Stay of the rats in barochamber under 0.3 MPa oxygen during 2 hrs induced separate sharp waves with no generalisation, the electron microscopic changes expressing activation of compensatory-adaptive processes. The generalisation of seizure activity over the cortex at 0.7 MPa oxygen affects a part of neuronal pool due, probably, to irreversible changes in inhibitory axosomatic synapses.
Animals↗
[Morphometric evidence of activation of axo-somatic synapses during administration of delta sleep-inducing peptide].
Computed morphometry proved activation of neocortex layer III-V axosomatic synapses. This is evident from an increase in the mean plasmalemma length, that in the active synapse zones on neurone bodies and width of the synaptic cleft, this being induced by a single intraperitoneal administration of delta-sleep-inducing peptide. The activation of the axosomatic synapses correlates with elevated GABA levels in the cerebral hemispheres cortex.
Animals↗
[Brain gamma-aminobutyric acid and homocarnosine in stress].
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Animals↗
[Ultrastructural mechanisms of the effect of myelopeptides on brain lesions in rats receiving endotoxin and the role of receptor-mediated endocytosis].
It has been demonstrated that myelopeptide is capable of preventing some ultrastructural alterations that take place in the brain in response to intravenous lipopolysaccharide injection by neuronal receptor blockade.
Animals↗
[Kidney carcinosarcoma].
A kidney tumour in a 36 year old female is described. The tumor was soft, of gray-brown color, size 12 x 11 cm. Histological, immunohistochemical and ultrastructural findings have demonstrated the signs of biphasic epithelial and mesenchymal cell differentiation. These data allowed the authors to define this tumor as a renal carcinosarcoma. Histogenesis of this tumor and differential diagnosis with other malignant renal tumors are discussed.
Adult↗
[Effect of delta-sleep peptide on the ultrastructural features of the rat sensomotor cortex].
The performed studies have shown that injection of DSIP causes an activation of nuclear apparatus and plastic metabolism in III-Y layer of the rat cerebral cortex. The activation of axo-axon and axosomatic synapses indicates the modulation of inhibitory processes in the cerebral cortex.
Animals↗
[Ultrastructural characteristics of the biological action of an endotoxin on sensorimotor cortical neurons].
The work is devoted to the ultrastructural investigation of the state of the sensomotor cortex neurons after intravenous and intracisternal administration of endotoxin. The evidences are presented concerning ultrastructural alterations in mitochondria and the presence of compensatory reaction in them after intravenous injection of endotoxin. Besides, coated vesicles and subsurface cisternae whose formation is induced by the endotoxin action have been studied.
Animals↗
[A morphometric study of the ultrastructure of the axosomatic synapses in the sensorimotor cortex of rats administered the delta-sleep inducing peptide].
Qualitative estimation and quantitative morphometry of ultrastructural changes in layers III, IV, and V in rat sensomotorial cortex after delta-sleep-inducing peptide administration, provides an evidence of multiplication of active inhibitory synapses induced by DSIP. The newly activated synapses may form an axo-somatic synaptic pool participating in optimization of the balance of excitement and inhibition processes in sensomotorial cortex.
Animals↗