ABSTRACT
PGP, as well as GPGPGP remain stable after 24-hour incubation in a proteolytic environment (in vitro), like equine and rat gastric juice, hydrochloric acid and pepsin in the solution of hydrochloric acid. Perhaps the appearance of PGP's metabolites--PG and GP, that found in the stomachic tissues, is associated with the action of tissue and blood peptidases. Thus, the effects of PGP and GPGPGP cause by the influences both of the peptides and their metabolites, that agree with previously results.
Subject(s)
Gastric Juice/chemistry , Glycine/analogs & derivatives , Oligopeptides/chemistry , Proline/analogs & derivatives , Animals , Dose-Response Relationship, Drug , Drug Stability , Glycine/chemistry , Horses , In Vitro Techniques , Male , Proline/chemistry , RatsABSTRACT
Tripeptide Pro-Gly-Pro interacted with dopamine receptors in vitro and reduced behavioral manifestations of apomorphine-induced hyperfunction of the dopamine system in verticalization, stereotypy, and yawning tests. Presumably, the behavioral effects of Pro-Gly-Pro tripeptide were mediated through post- and presynaptic D(2)and D(3)receptors.
Subject(s)
Behavior, Animal/drug effects , Oligopeptides/pharmacology , Proline/analogs & derivatives , Receptors, Dopamine D2/drug effects , Receptors, Dopamine D3/drug effects , Animals , Male , Mice , Proline/pharmacology , Receptors, Dopamine D2/metabolism , Receptors, Dopamine D3/metabolism , Synapses/drug effects , Synapses/metabolismABSTRACT
Glyprolines (PGP, GPG, GPGP, PGPGP, and GPGPGP) modulated histomorphological characteristics of acetate ulcers. They accelerated healing of acetate ulcers, promote complete differentiation of the surface epithelium and glands in the gastric mucosa, contributed to the appearance of a considerable number of fibroblasts at the site of the regenerating mucosa, and significantly decreased the count of macrophages.
Subject(s)
Oligopeptides/pharmacology , Stomach Ulcer/drug therapy , Acetic Acid/toxicity , Animals , Gastric Mucosa/drug effects , Gastric Mucosa/injuries , Gastric Mucosa/pathology , Male , Oligopeptides/chemistry , Proline/chemistry , Rats , Regeneration/drug effects , Stomach Ulcer/chemically induced , Stomach Ulcer/pathology , Wound Healing/drug effectsABSTRACT
Renal blood flow was ultrasonographically studied in 220 children, adolescents, and young, postpubertal patients who had fell ill with type 1 diabetes mellitus (DM) in childhood (of them there were 111 (49.8%) males and 112 (50.2%) females with a disease history of 1 to 27 years (73 patients with diabetic nephropathy (DN) and 150 without DN). Thirty apparently healthy children and adolescents made up a comparison group. Doppler duplex scanning and Doppler pulse-wave study (DPWS) were made at the level of the great renal artery, segmental, interlobar, and arcuate arteries. With DPWS, the values of peripheral resistance were lower than the normal values at the level of interlobar and arcuate arteries in all patients with microangiopathies. There were significant differences between the groups of patients with different types of microangiopathies, the group of patients with DM without DMA, and the control group. Echography was used to determine the volumes of the kidneys in 220 patients. In patients with DM, renal volume was significantly greater than that in the control patients (p<0.05).
