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Biomedical subjects

M Ciardi

Publications and source records attributed to M Ciardi.

25 records · Page 2Linked to original sources
PubMed1989

Cerebral spinal fluid IgG production in HIV-positive patients.

A brief characterization of 27 neurologic syndromes occurring in 44 AIDS patients during two years is presented. In 4 out of 7, intrathecal Ig synthesis was demonstrated without the CSF cell count and blood brain barrier values being within a normal range. Ig intrathecal formation was also observed in 2 LAS patients without neurological symptoms. Similar changes in CSF findings occur in other subacute encephalitis, particularly in multiple sclerosis. Activation of CSF B-cells or their depression due to impairment of CD8 T-lymphocytes was indicated as the cause of this phenomenon. In the Authors' opinion this explanation is somewhat general. The possibility of an immune response in CNS was clearly demonstrated, but in the CSF neither B-cells nor Ig producing plasma cells are evident. In addition, it should be noted that the reliability of blood brain barrier and Ig intrathecal assessment procedures is doubtful in ADC disease, because of the severe alterations in serum albumin and Ig concentrations seen in these patients.

AIDS-Related Complex↗
PubMed1986

Influence of ofloxacin on murine Peyer's patch lymphocytes.

Several factors must be considered before the clinical impact of antimicrobials on the immune function can be determined. No data are available as yet on the influence of ofloxacin, a new fluoro-quinolone, on the lymphocytes of Peyer's patches. The present study offers evidence that murine Peyer's patches are influenced by ofloxacin administered by the oral route for seven days (15 mg/kg). No modifications of the percentage of the Thy 1,2 and SIg positive splenocytes and of the PHA and LPS-induced proliferative responses were observed studying cell suspensions from the spleen of the same animals. An immunotoxic effect of the compound on the cells of Peyer's patches or an impairment of their homing tendency has been postulated.

Animals↗
PubMed1985

Detection of phenolalkylamines by capillary column gas chromatography-negative chemical ionization mass spectrometry.

Twelve phenolalkylamines normally used in different pharmaceutical products were determined in urine from volunteers given a therapeutical dose of the drug. The urine extracts were first derivatized with perfluoro propionic or butyric anhydride, then detected by capillary gas chromatography-negative chemical ionization mass spectrometry. The method is highly sensitive and specific in the analysis of biological samples.

Chromatography, Gas↗
PubMedDate not supplied

Cerebrospinal fluid antiganglioside antibodies in patients with AIDS.

In this study the presence of brain antiganglioside antibodies in the cerebrospinal fluid (CSF) of patients with HIV infection was analysed. CSF samples were collected from 45 patients with AIDS and from 45 anti-HIV negative subjects, 15 of whom presented aseptic meningitis. Nineteen AIDS patients had clinically well-documented encephalopathy. Thirteen of these patients had white matter lesions shown by magnetic resonance imaging (MRI). Both IgG and IgM antiganglioside antibodies were detected by immunostaining on thin layer chromatography plates in three CSF samples from AIDS patients with progressive encephalopathy with signs of a diffuse demyelination, as revealed by MRI. Two of these CSF samples reacted specifically with GM3, GM1 and GD1a and one with GD1a. In none of the HIV infected patients without demyelinating encephalopathy, but with opportunistic infections or cerebral lymphoma, nor in the anti-HIV negative control subjects were antiganglioside antibodies detected. No association with JCV DNA, CMV DNA, EBV DNA, detected by nested PCR, nor HIV antigen p24 was found. These findings show the presence of brain antiganglioside antibodies in the CSF of AIDS patients for the first time. However, the findings do not suggest relating the presence of these antibodies to HIV encephalopathy or particular viral agents, but indicate that the antibodies are detectable in subjects with progressive encephalopathy with a diffuse demyelination.

Acquired Immunodeficiency Syndrome↗