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Biomedical subjects

J Denis

Publications and source records attributed to J Denis.

At least 55 records · Page 3Linked to original sources
PubMed1987

HSV1 strain sensitivity in experimental rabbit keratitis: evolution under repeated topical IDU administrations.

The effects of repeated topical idoxuridine (IDU) administration of HSV1 strain sensitivity were investigated during 6 serial passages (P1 to P6) in the rabbit. By comparison to placebo treated rabbits, a delay in ulcer cicatrization appeared at P2 and clinical resistance was completed at P3. Clinical cross resistance to acyclovir (ACV) was also tested and demonstrated at P7. In vitro, a plaque reduction test on Vero cells using directly the tear film HSV populations allowed the prediction of the resistance by an early rise in the effective dose 90% (ED 90) value anticipating that in ED 50%. An ED 50 determination by dye-uptake assay on P6 HSV isolate demonstrated a cross resistance to viral thymidine kinase (TK) dependent drugs without any change in Ara-A and PFA sensitivity, according to a 23% TK activity at P6. At the last passage the HSV drug resistant population had an unrestricted corneal pathogenicity. A return to IDU and ACV in vitro sensitivity was demonstrated in group control animals at P2 but not at P4 or P6.

Acyclovir↗
PubMed1987

[Rupture of the left ventricle into the free pericardium in the early stage of a myocardial infarction. Diagnosis using echocardiography and surgical treatment].

A case of subacute left ventricular rupture on the 4th day of an inaugural antero-septal infarction in a 63-year old woman is reported. The diagnosis, suggested by cardiovascular collapse with acute tamponade, was confirmed by echocardiography. Haemodynamic stability was maintained by needle aspiration followed by pericardial drainage, and right heart catheterization long enough for the patient to be transported to a Cardiovascular Surgery unit where surgical repair was successfully performed 9 hours after the rupture. The elements for a positive diagnosis, the value of echocardiography, the various surgical procedures and the favourable long-term prognosis in patients operated upon are discussed.

Cardiac Surgical Procedures↗
PubMed1986

[Plasma levels of clomipramine and declomipramine in patients with depression: a study of its correlation with therapeutic efficacy].

Twenty four in-patients with an endogenous or non endogenous depressive syndrome (9 and 15, respectively) were treated in hospital for 21 days with various dosages regimens of clomipramine. Plasma concentrations of clomipramine and demethylclomipramine were determined once a week in blood samples. Therapeutic effects were assessed with Hamilton Rating Scale. At day 21, optimal therapeutic effect was observed when the sum of clomipramine and demethylclomipramine plasma levels was situated between 200-400 ng/ml.

Adolescent↗
PubMed1985

[Anal fistulas].

Explore the source record for details and available documents.

Abscess↗
PubMed1985

[Viral type particles in the germinal centers during a lymphadenopathic syndrome related to AIDS].

The identification of virus-like particles in the germinal centers of an AIDS-related lymph node with histological findings of group IA is reported. A 23 year-old man, intravenous drug user, presents an inversion of T helper/T suppressor cell ratio and a peripheral generalized lymphadenopathy, suggesting a diagnosis of ARC. Lymph node biopsy shows follicular hyperplasia and features consistent with group IA of AIDS-related lymphadenopathy. Immunohistochemical study reveals an increase of intrafollicular T8+ lymphocytes. Electronmicroscopic examination of follicles demonstrates the presence of particles showing features of viral nucleocapsids; these particles are seen between the cytoplasmic processes of follicular dendritic cells. Pathologic findings associated with lymphoid follicular hyperplasia in AIDS prodromal period are examined. The importance of lymph node biopsy with histological, immunohistochemical and ultrastructural studies, in patients at high risk for AIDS, is demonstrated. The detection of type D viral particles suggestive of retrovirus is in accordance with results of virologic studies which indicate the involvement of a retrovirus (called LAV or HTLV III) in the etiology of the disease.

Acquired Immunodeficiency Syndrome↗
PubMed1984

[Fibrolamellar carcinoma of the liver: hepatocellular carcinoma with favourable prognosis].

The authors report a case of fibrolamellar carcinoma of the liver in a young woman with bilateral lung metastases. This tumour was surgically unremovable. Presently, after a chemotherapy with adriamycin and mitomycin, this patient is in good health, two years after initial diagnosis. Review of the literature shows that fibrolamellar carcinoma of the liver occurs mainly in young patients. This tumor is characterised by large polygonal eosinophilic hepatocytes and an abundant fibrous stroma. It can be confused with focal nodular hyperplasia. Resection of the tumor and the methodical, repeated resections of metastases must be performed when possible. Prognosis of this tumor is better than that of the other variants of hepatocellular carcinoma.

Adult↗
PubMed1984

[Acyclovir and trifluorothymidine in herpetic kerato-uveitis. A comparative clinical study. Indications for corticoid therapy].

The relative efficacy of aciclovir (ACV) and trifluorothymidine (TFT) was evaluated in a randomized, open clinical trial of 37 patients with herpetic kerato-uveitis. Twenty-one patients were treated with ACV and 16 with TFT. Topical steroids were withheld as long as the degree of inflammation permitted. Although both drugs were effective in healing the herpetic corneal ulcers, TFT had a significantly shorter healing time than ACV. However, ACV was more effective in treating the iridocyclitis than TFT. In 5 cases the keratouveitis responded to ACV alone, while only one case was successfully managed with TFT alone. Both drugs seemed to prevent steroid-induced epithelial complications and no significant side-effects were observed with either drug. The treatment of herpetic keratouveitis with single agents such as ACV and TFT is dependent upon rapidly instituting therapy and minimizing the use of topical steroids. The apparently good intraocular penetration of ACV and TFT may decrease the need for adjunctive steroid therapy and thereby minimize the risks of facilitated viral replication and steroid-dependence.

Acyclovir↗
PubMed1983

[Immunoallergic complication induced by rifampicin with disseminated intravascular coagulation].

In a 48-years old woman, intermittent rifampicin treatment induced an immunoallergic reaction with digestive disorders, haemolysis, acute renal failure and prolonged prothrombin time. The reintroduction of rifampicin, 17 days later, resulted in a similar, though more severe, reaction associated with diffuse haemorrhages from disseminated intravascular coagulation, this association being exceptional. The responsibility of rifampicin was demonstrated by the chronological relationship between clinical symptoms and administration of the drug, and by the presence in the patient's serum of anti-rifampicin antibodies. The antigen-antibody reaction with complement activation and haemolysis probably explains the disseminated intravascular coagulation.

Acute Kidney Injury↗
PubMed1983

[Intramural abscesses of the rectum].

Intramural abscesses of the rectum developed in the complex longitudinal layer may be isolated or associated with a transphincteric fistula. They may be acute or subacute and are diagnosed by intrarectal palpation. The only treatment is surgical: the abscess is opened into the rectal cavity, except in case of association with suprasphincteric fistula, when it must be drained through the skin. Postoperative complications are minor ones and relapses are rare (1.75% of cases).

Abscess↗
PubMed1983

Respective roles of ammonia, amino acids, and medium-sized molecules in the pathogenesis of experimentally induced acute hepatic encephalopathy.

Ammonia, amino acids (AA), and middle molecules (MM) have been implicated in the pathogenesis of experimentally induced acute hepatic coma in the pig. Hemodialysis (HD) using either a low- (Cuprophan = CU) or a high-permeability (polyacrylonitrile = AN 69) membrane has demonstrated the role of MM. Selective hemodialysis (SHD) of AA or NH3 and MM was performed by adding either NH3 (group I) or AA (group II) to the dialysate during AN 69 HD; for MM, SHD only was performed by adding NH3 and AA to the dialysate (group III). In group I the brain levels of tyrosine were similar to those in undialyzed animals with decreased striatal dopamine and decreased norepinephrine in the midbrain only. Brain tryptophan was higher than normal, but brain levels of 5-hydroxytryptamine and 5-hydroxyindoleacetic acid (5-HT, 5-HIAA) were within normal limits. In group II, despite an efficient NH3 clearance, brain NH3 levels were as high as in group I and did not correlate with plasma levels. Brain tyrosine (despite tyrosine overload of the dialysate) was lower than in group I; striatal dopamine decreased (but to a lesser extent than in group I), and norepinephrine was normal. Brain tryptophan was higher than normal, with an increase in brain 5-HT and 5-HIAA. In group III, results were similar to group I, except for a limited increase of 5-HT in the pons. Brain octopamine levels increased only in undialyzed and CU-HD animals, demonstrating a specific relation with MM. These experiments demonstrate the interrelationship between NH3 and neutral AA with regard to passage through the blood-brain barrier and to intracerebral metabolism.

Amino Acids↗