PMID- 6152873 OWN - NLM STAT- MEDLINE DCOM- 19880610 LR - 20191023 IS - 0742-0528 (Print) IS - 0742-0528 (Linking) VI - 1 IP - 1 DP - 1984 TI - Role of autonomic nervous system in the time-dependent hyperglycemia induced by intracranial injection of D-mannitol and D-glucose. PG - 27-35 AB - Intracranial injection of D-mannitol (MA) or D-glucose (GL) caused photoperiodic hyperglycemia in rats; MA injection elicited hyperglycemia only in the light period, while GL injection induced it only in the dark period. To elucidate the mechanisms of these hyperglycemias, we examined the effect of the autonomic nervous system on them in rats under the L:D (12:12) condition. Propranolol, a beta-adrenergic blocker, and hexamethonium, a ganglion blocker, effectively inhibited hyperglycemia induced in either the light (MA) or dark (GL) period. In contrast, phenoxybenzamine, an alpha-adrenergic blocker, and atropine, a cholinergic blocker, inhibited hyperglycemia induced in the light period (MA), but not that induced in the dark period (GL). These findings suggest that alpha and beta-adrenergic and cholinergic mechanisms are involved in the hyperglycemia induced by MA in the light period, while only the beta-adrenergic mechanism is involved in the hyperglycemia induced by GL in the dark period. FAU - Yamamoto, H AU - Yamamoto H AD - Institute for Protein Research, Osaka University, Japan. FAU - Nagai, K AU - Nagai K FAU - Nakagawa, H AU - Nakagawa H LA - eng PT - Comparative Study PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - England TA - Chronobiol Int JT - Chronobiology international JID - 8501362 RN - 0 (Hexamethonium Compounds) RN - 0TTZ664R7Z (Phenoxybenzamine) RN - 3C9PSP36Z2 (Hexamethonium) RN - 3OWL53L36A (Mannitol) RN - 7C0697DR9I (Atropine) RN - 9Y8NXQ24VQ (Propranolol) RN - IY9XDZ35W2 (Glucose) SB - IM MH - Animals MH - Atropine/pharmacology MH - Autonomic Nervous System/drug effects/*physiopathology MH - *Circadian Rhythm MH - Darkness MH - Glucose/administration & dosage/*toxicity MH - Hexamethonium MH - Hexamethonium Compounds/pharmacology MH - Hyperglycemia/chemically induced/*physiopathology/prevention & control MH - Injections, Intraventricular MH - Light MH - Male MH - Mannitol/administration & dosage/*toxicity MH - Phenoxybenzamine/pharmacology MH - Propranolol/pharmacology MH - Rats MH - Rats, Inbred Strains EDAT- 1984/01/01 00:00 MHDA- 1984/01/01 00:01 CRDT- 1984/01/01 00:00 PHST- 1984/01/01 00:00 [pubmed] PHST- 1984/01/01 00:01 [medline] PHST- 1984/01/01 00:00 [entrez] AID - 10.3109/07420528409059115 [doi] PST - ppublish SO - Chronobiol Int. 1984;1(1):27-35. doi: 10.3109/07420528409059115.