cyclic amp/atrophy

Bilateral ischemia induced by occlusion of the carotid arteries for 5 min causes a selective degeneration of CA 1 neurons of the hippocampus of Mongolian gerbils. The degeneration process is complete in 14 days as assessed by light microscopy. After one week, basal values for radioactive cyclic AMP

We studied how stimulation of protein kinase C and cAMP-dependent protein kinases affect the development of mesencephalic dopaminergic neurons in primary cell cultures derived from fetal rats at embryonic day E14. The effects of compounds which activate these second messenger systems were compared

Dark-adapted retinas or whole eyes of 13-line ground squirrels (Citellus tridecemlineatus) and western fence lizards (Sceloporus occidentalis) contain higher levels of cyclic AMP than of cyclic GMP. In these cone-dominant retinas, light reduces cyclic AMP content selectively. Freezing of dark- or

Plasma cyclic AMP responses to adrenaline administration in normal volunteers, patients with spinocerebellar degeneration, bronchial asthma, pulmonary emphysema, and diabetes mellitus were studied. Intramuscular administration of low doses (0.1--0.4 mg/person) of adrenaline caused a dose-dependent

The Purkinje cell degeneration mutant (pcd) is characterized by a complete loss of cerebellar Purkinje cells. Norepinephrine causes an accumulation of cyclic AMP in the cerebellum of pcd that is far greater than in normal mice. Experiments were conducted 1) to correlated changes in the

Fibrinoid degeneration of myocardial fibrils was induced in BALB/c mice treated from 2 months of age with weekly injection of dibutyryl cyclic DAMP and/or theophylline. No evidence of cellular reaction or vascular occlusion was found.

The cAMP phosphodiesterase (PDE) activity of CHO cells was unaffected by the addition of Ca2+ +calmodulin (CaM), indicating the absence of any PDE1 (Ca2+/CaM-stimulated PDE) activity. Treatment with the tumour promoting phorbol ester phorbol 12-myristate 13-acetate (PMA) led to the rapid transient

1. Degenerative processes of PC12 cells after acute withdrawal of nerve growth factor (NGF) were characterized. PC12 cells treated with NGF share properties similar to sympathetic neurons, and only these cells responded to acute withdrawal of NGF by degeneration characterized by disappearance of

A cDNA clone encoding a novel putative G protein-coupled receptor was isolated from rat aortic vascular smooth muscle cell cDNA library by the polymerase chain reaction (PCR) using degenerate oligonucleotide primers and subsequent hybridization screening with a cloned PCR product. Sequence analysis

The effects of the central administration (i.c.v.) of dibutyryl cyclic AMP (DBcAMP) on arterial blood pressure and heart rate were studied in the rat. The cyclic nucleotide produced a dose-dependent rise in blood pressure and an accompanying tachycardia. Maximal pressor effect of a single dose of

Environmental stimuli influencing catecholamine levels induce changes in cyclic AMP-dependent reactions and cell morphology in the rat parotid. Responses of salivary glands to spaceflight were determined by measurement of cyclic AMP-mediated reactions in fresh-frozen salivary glands and by

In patients with chronic obstructive pulmonary disease (COPD), mucociliary clearance of the respiratory tract is impaired due to enhanced mucus secretion and deterioration of normal ciliary activity. We investigated the effects of cyclic AMP-elevating agents with a different mode of action on