Biomedical subjects

J Georgieva

Publications and source records attributed to J Georgieva.

21 records · Page 2Linked to original sources

PubMed1989

Effects of the diterpene sclareol glycol on body temperature in rats.

The effects of the diterpene sclareol glycol (SG) of the labdane family on rectal body temperature in rats were studied. Sclareol glycol induced dose-dependent changes in temperature. At the lowest dose (5 mg/kg) SG produced a decrease followed by an increase in temperature; at the middle dose it produced a decrease and at the largest dose, an increase in rectal temperature. Sclareol glycol caused changes in apomorphine-induced hypothermia (at the low and middle doses it reversed hypothermia, and at the high dose hypothermia was enhanced). Sclareol glycol produced a dose-dependent reversal of reserpine-induced hypothermia. These results suggest that the diterpene sclareol glycol induces changes in core body temperature by interacting with dopamine (DA) receptors and with the second messenger system of 3',5'-AMP in the brain thermoregulatory areas.

Animals↗

PubMed1989

Effects of the diterpene sclareol glycol on convulsive seizures.

The effects of the diterpene sclareol glycol (SG) of the labdane family on convulsive seizures induced by pentylenetetrazole (PTZ), picrotoxin and bicuculline in mice were studied. Sclareol glycol potentiated convulsive seizures induced by PTZ (60 and 80 mg/kg) and antagonized the anticonvulsant effect of diazepam. At low doses, SG gave a protective effect against convulsions induced by picrotoxin and bicuculline, and prolonged the latency to convulsions. At larger doses, SG increased the intensity of convulsive seizures. Forskolin, a diterpene of the same family, evoked a protective effect against convulsions induced by bicuculline and prolonged the latency.

Animals↗

PubMedDate not supplied

Measures of anxiety, retention and stress in the rat following treatment with the diterpene sclareol glycol.

In a punished drinking test in rats sclareol glycol (SG) decreased the number of punished responses ("proconflict response") while diazepam had the opposite effect; SG antagonized the "anticonflict response" of diazepam. Post-training administration of SG in rats enhanced retention in active avoidance task evaluated 24 h later. SG produced an increase in plasma ACTH and corticosterone levels in unstressed rats. The stress-induced increase in ACTH and corticosterone secretion was potentiated by SG. All these data suggest that SG behaves as an anxiogenic, memory-facilitator and perhaps adaptogenic agent. The effects of SG may be mediated by different mechanisms of action (stimulation of adenylate cyclase, interaction with GABA-ergic and dopaminergic transmitter mechanisms).

Adrenocorticotropic Hormone↗