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Biomedical subjects

P Simon

Publications and source records attributed to P Simon.

At least 505 records · Page 28Linked to original sources
PubMed1980

Evidence for the role of noradrenaline in some effects of quipazine.

In mice, quipazine has shown several behavioral effects: It antagonizes hypothermia induced by a high dose of apomorphine without altering climbing or stereotyped behavior; it antagonizes oxotremorine-induced hypothermia without altering tremors or peripheral signs; and it increases the toxicity of yohimbine. These three responses are considered to be predictive of an antidepressive action; in these three tests the effects of quipazine are inhibited by D,L-propranolol but not by D-propranolol or methysergide. Quipazine, in mice pretreated with pargyline, induced head twitches which were inhibited by methysergide but not by D,L-propranolol. Quipazine, in addition to its well-known serotonergic effects, seems to have beta-adrenergic properties which should be kept in mind when this drug is used as a pharmacological tool and which suggest that the beta-adrenergic system is implied in depression.

Animals↗
PubMed1980

Adherence of elderly patients.to treatment with pentoxifylline.

A study of adherence to treatment was conducted by 179 general practitioners in elderly outpatients with geriatric cerebral symptomatology treated with pentoxifylline. The drug was provided in 2 different randomized packages, with or without memory-aid stickers (also randomized). Compliance was assessed by pill count after 1 mo of treatment. Clinical evolution was assessed by a digit-span test, and by filling in 9 "relative" visual analogue scales of aggravation--improvement. Side effects were recorded from patient complaints. Leftover drug was brought back by 83.1% of patients, and this proportion was influenced neither by packaging type nor memory-aid stickers. Compliance was considered good (fewer than 30 tablets returned) in 62% of patients, and was not influenced by either packaging types or stickers. Peaks of pill count were evident at multiples of packaging units (10 or 40 according to type). Compliance was not related to age or sex, but was related to memory score. There was a correlation between compliance and clinical improvement, and a significant inverse correlation between the former and the frequency of side effects.

Aged↗
PubMed1980

HLA-DR4 antigen and IgA nephropathy.

HLA-A, B and DR antigens were tested in 45 unrelated patients with IgA nephropathy (Berger's disease). A significant association with HLA-DR4 was noted. An unusual finding was a secondary association with the A2-B12 antigen combination.

Histocompatibility Antigens Class II↗
PubMed1980

A beta adrenergic stimulant (salbutamol) versus clomipramine in depression: a controlled study.

A controlled study comparing salbutamol (6 mg/day) to clomipramine (150 mg/day), both given by intravenous infusion, was performed on depressed inpatients (10 per group). The symptomatology was evaluated by two blind observers at days 0, 5, and 15 using the Hamilton Rating Scale. Both treatments were effective on the overall symptomatology but the onset of action of salbutamol was more rapid.

Adolescent↗
PubMed1980

[Biochemical and pharmacological approach to the functional disorders observed in demyelination mutants (GABAergic and noradrenergic systems)].

The abnormal behavior observed in diseases of myelin remains unexplained. Mutations in the mouse in which the main phenotypic expression involves myelination is a useful tool. As tonic seizures are observed, an electrophysiological, pharmacological and biochemical study was performed. The convulsions seem to be linked mainly to an alteration of the alpha-adrenergic system. The GABA-ergic system is also modified. The relations between these observations and the defect of myelination remain to be elucidated.

Animals↗
PubMed1980

[Treatment of orthostatic hypotension induced by tricyclic antidepressants with yohimbine (author's transl)].

Following the observation that two patients with depression and essential orthostatic hypotension recovered from the latter affection after yohimbine administration, an open study was conducted to assess the activity of yohimbine in correcting orthostatic hypotension induced by tricyclic antidepressants. Results were conclusive in 10 of the 11 patients treated, and were confirmed in a further 12 cases during a double-blind study. Yohimbine appears to be the most effective treatment for orthostatic hypotension, either essential or induced by thymoanaleptic or neuroleptic therapy.

Blood Pressure↗
PubMed1979

Antagonism by d,1-propranolol of imipramine effects in mice.

Three agents with known or suspected antidepressant activity, imipramine, salbutamol and dexamphetamine, were active in animal tests predictive of an antidepressant effect in man: antagonism of the hypothermia induced by reserpine, by oxotremorine or by a high dose of apomorphine, and the potentiation of the yohimbine-induced toxicity. These effects were antagonized by d,1-propranolol, suggesting that the stimulation of beta-adrenergic receptors could be a common mechanism underlying their effects. These results agree with the noradrenergic hypothesis of the pathophysiology of affective disorders.

Albuterol↗