Biomedical subjects

M G Agresti

Publications and source records attributed to M G Agresti.

5 recordsLinked to original sources

PubMed1994

Clinical and mycological evaluation of fluconazole in the secondary prophylaxis of esophageal candidiasis in AIDS patients. An open, multicenter study.

A prospective, multicenter, open study of fluconazole prophylaxis was performed in AIDS patients to evaluate the efficacy and toxicity of the drug in preventing relapses of esophageal candidiasis. To this aim, 99 AIDS patients who presented a first episode of clinically and microbiologically confirmed esophageal candidiasis were enrolled in eleven clinical centers scattered throughout the Italian territory. After resolution of this initial esophagitis, all subjects were given fluconazole, 100 mg/die, and followed up for a 6 month period. Only 7 out of the 99 patients enrolled had a relapse of Candida esophagitis, during a mean follow-up period of 138.5 days. All relapsing patients had CD4+ cell number < 100/microliters at baseline. Mild side effects were reported in only eight patients. However, 14 of the 27 subjects from whom serial serum samples were available became (12) or remained (2) antigenemic during fluconazole prophylaxis, independently from relapse, suggesting the persistence of tissue-invasive, proliferating Candida cells. Overall, the data of this study suggest a beneficial effect of prophylactic maintenance therapy with fluconazole against Candida esophagitis, particularly in the population with > 100 CD4+/microliters. However, the data on Candida antigenemia in these patients invite the consideration of a relative inefficiency of the drug to eradicate the microrganism from the esophageal tissue.

AIDS-Related Opportunistic Infections↗

PubMed1994

Long-term follow-up of zidovudine therapy in asymptomatic HIV infection: results of a multicenter cohort study. The Italian Zidovudine Evaluation Group.

In 1990 the results of a placebo-controlled study conducted within the AIDS Clinical Trials Group (ACTG 019) showed that in the short term, zidovudine was effective in slowing progression to advanced disease in HIV-infected asymptomatic patients with low CD4 cell counts. More recently, the preliminary results of the Concorde Trial suggested that while the data at 1 year agreed with those of ACTG 019, no sustained clinical benefit was detectable at 3 years for early versus deferred therapy. Therefore, the length of the clinical usefulness of zidovudine in this population is still to be determined. We evaluated the 2-year outcome of zidovudine therapy in asymptomatic patients through the prospective follow-up of a cohort of 936 subjects with low CD4+ (< 500/mm3) counts who strictly satisfied, at enrollment, the inclusion and exclusion criteria of the ACTG 019 trial. The clinical end point of the analysis was the development of AIDS. The majority (72.2%) of the individuals in the cohort acquired HIV infection through intravenous drug use; 26.6% were women. The median baseline CD4 cell count was 308/mm3. At 55 weeks of mean follow-up, the progression rate to AIDS (3.2 events per hundred person-years) appears to be comparable to that already reported at the same mean follow-up time for the ACTG 019 zidovudine-treated asymptomatic patients. After 124 weeks of mean follow-up, the overall rate of progression to AIDS was 5.2 per hundred person-years.(ABSTRACT TRUNCATED AT 250 WORDS)

Acquired Immunodeficiency Syndrome↗

PubMed1992

Survival of zidovudine-treated patients with AIDS compared with that of contemporary untreated patients. Italian Zidovudine Evaluation Group.

OBJECTIVE: To assess the long-term effectiveness of zidovudine (AZT) in patients with acquired immunodeficiency syndrome (AIDS). This assessment has never been adequately done because controlled clinical trials were stopped early and survival comparisons were made with historical controls. DESIGN: Nonrandomized contemporary observational study of patients treated and not treated with zidovudine. SETTING: Twenty-three AIDS treatment centers throughout Italy that reported cases to the National Registry of AIDS Cases between July 1987 and March 1988. PATIENTS: One hundred fifty-nine zidovudine-treated and 112 untreated patients with AIDS, the majority of whom had acquired human immunodeficiency virus (HIV) infection through intravenous drug use. OUTCOME MEASURES: Median survival and 1- and 2-year survival for treated and untreated groups, as estimated using the Kaplan-Meier method. Cox proportional hazards regression analysis was also used to identify independent predictors of survival among the variables studied. RESULTS: Patients were similar with respect to CD4/CD8 ratio, age, sex, clinical and immunological status at diagnosis, and source of HIV infection. After 24 months, survival was 45.9% (95% confidence interval [CI], 36.1% to 55.7%) in the treated group and 20.5% (95% CI, 12.6% to 28.3%) in the untreated group, with median survival of 21.2 and 9.6 months, respectively. CONCLUSIONS: Possible biases of this study include imperfect matching for clinical status and better overall medical care of treated patients. Nevertheless, we believe that the observed differences in survival were primarily due to zidovudine treatment.

Acquired Immunodeficiency Syndrome↗

PubMedDate not supplied

[Decrease in notifications of AIDS dementia complex in 1989-1990 in Italy: possible role of the early treatment with zidovudine].

We evaluated the incidence of AIDS dementia complex (ADC) in groups of patients who acquired infection through different risk behaviours, and attempted to evaluate the possible role of zidovudine (AZT) treatment in preventing or delaying the onset of ADC. The Italian National AIDS Registry was used to study patients with AIDS for whom ADC was reported as an index disease. Relative risk of presenting ADC between different patient categories has been determined. Logistic regression was used to analyse temporal trends in the proportion of AIDS cases presenting with ADC. Of the 6466 cases reported between August '87 and August '90, ADC was seen in 640 (9.9%). I. V. drug addicts had twice the risk (estimated odds ratio: 1.9; 95% confidence interval: 1.5-2.6, p less than 0.001), compared to homo/bisexuals, of presenting with ADC. There is significant evidence (p less than 0.0001) that after a progressive increase in the period '87-'89, it began a definite decrease in the monthly proportion of ADC cases, starting August '89. AZT was introduced in Italy in July 1987 for patients with AIDS or advanced ARC. The incidence of AIDS dementia complex at the moment of AIDS diagnosis in our population of patients, began to decline 24 months after the introduction of systematic AZT treatment in Italy. This could have been due to inhibition of HIV replication in the Central Nervous System among patients who initiated AZT-treatment before developing full-blown AIDS.

AIDS Dementia Complex↗

PubMedDate not supplied

Anti-cardiolipin antibodies in HIV infection are true antiphospholipids not associated with antiphospholipid syndrome.

The aim of the present study was to evaluate the fine specificity of anticardiolipin (aCL) antibodies detectable in the sera of patients with HIV infection. aCL are generally associated with thrombotic events in autoimmune diseases. A solid phase ELISA which discriminates between aCL binding to phospholipids and aCL binding to phospholipid/beta 2-glycoprotein I (cofactor) complex was employed. Thirty-nine HIV and 20 aCL positive systemic lupus erythematosus (SLE) sera were examined. In HIV sera, reduced binding to phospholipid was seen if cofactor was added. On the contrary, in SLE-sera the cofactor improved aCL binding. No thrombotic events were recorded in HIV infected subjects presenting with aCL. Thus, aCL in HIV infection and in SLE appear to have different specificities. In HIV infection the true epitope of aCL is likely to be on the phospholipid component only, whereas in SLE aCL seem directed against the cofactor/CL complex. Considering the anticoagulant role of beta 2-glycoprotein I, this observation might account for the lack of thrombosis in HIV patients with "true" aCL.

Antibodies, Anticardiolipin↗