Severe osteoporosis as atypical presentation of hereditary hemochromatosis

Besides important metabolic repercussions, iron overload is reported to be associated with deleterious effects on articulations and bones. We present the case of a male patient diagnosed with severe osteoporosis and vertebral fracture, in whom the evaluation for secondary osteoporosis revealed hereditary hemochromatosis.

Non-organ specific autoantibodies against cellular components in HIV-1 infected individuals

OBJECTIVE

To detect the presence of autoantibodies against cellular components in HIV-1 infected individuals.

METHODS

Serum samples from 87 patients with HIV-1 infection and from 17 healthy HIV-seronegative controls were tested using sensitive and specific techniques (immunoblot, RNA precipitation), as well as counterimmunoelectrophoresis and indirect immunofluorescence.

RESULTS

Four sera (4.6%) showed reactivity in immunoblot against various unidentified cytoplasmic autoantigens. The four positive sera were obtained from patients belonging in equal numbers to the non-AIDS and AIDS groups.

CONCLUSION

It appears that the production of antibodies against cellular components rarely occurs during the clinical course of HIV infection.

Lung squamous cell carcinoma presenting with brain metastases in an HIV-positive patient

The case history of a patient with squamous cell carcinoma of the lung and HIV infection is described, who presented clinically with CNS symptomatology. No association of the tumor with human papilloma virus was found.

Levels of the circulating cell adhesion molecule E-selectin and disease progression in HIV infection

The levels of soluble form of E-Selectin (sEs), or endothelial-leukocyte adhesion molecule-1, were measured in 96 sera derived from 72 HIV-infected patients at different stages of the disease, 60 healthy blood donors, and 50 HIV-negative patients with infections, using a quantitative ELISA. Levels of sEs in HIV-infected individuals without AIDS, according to the 1993 classification system of the Centers for Disease Control, were higher than normal (mean +/- SEM 48 +/- 4 versus 35 +/- 3 ng/ml, p = 0.003). Patients with established AIDS, who were afebrile and had no evidence of acute concurrent infection, had even higher sEs serum levels (70 +/- 9 ng/ml, p = 0.009, compared to those without AIDS). A significant increase in clinical category disease progression was present. Individual concentrations of sEs correlated directly with levels of soluble intercellular adhesion molecule-1 (p < 0.00001) and IL-2 receptor (p = 0.001), but not with CD4+ T-cell counts. Zidovudine treatment was not associated with changes in sEs serum levels. Elevated sEs levels were also found in HIV-seronegative patients with other bacterial and protozoal infections. Since sEs is a biologically active molecule, further studies should investigate the pathogenetic significance of circulating sEs in HIV-related disease progression, and assess the prognostic value of sEs determination for these patients.