Correlation of CD4 counts with renal disease in HIV positive patients

Area of Science:

• Nephrology
• Infectious Diseases
• Immunology

Background:

• Human immunodeficiency virus (HIV) infection is associated with various complications, including kidney disease.
• HIV-associated nephropathy (HIVAN) is a significant cause of morbidity and mortality in HIV-positive individuals.
• Understanding the relationship between immune status and renal manifestations is crucial for patient management.

Purpose of the Study:

• To investigate the correlation between CD4+ T-cell counts and the presence of albuminuria in HIV-infected patients.
• To assess the association between CD4+ T-cell counts, albuminuria, and histological findings of glomerular lesions.
• To determine the prevalence of HIV-associated nephropathy (HIVAN) and other renal pathologies in this cohort.

Main Methods:

• A cohort of 104 HIV-positive patients was studied over nine months.
• Albuminuria was screened using the urine dipstick method; patients with 2+ or higher albuminuria underwent renal biopsy.
• Histological examination of renal biopsies was performed using light microscopy, with electron microscopy utilized when feasible.

Main Results:

• Albuminuria was detected in 27% of patients and showed a significant negative correlation with CD4+ T-cell counts (p<0.01).
• Patients with CD4+ counts below 350 cells/mm³ had a 3.5-fold increased risk of albuminuria.
• Renal biopsies revealed HIVAN in 70% of the 10 patients biopsied, indicating a high prevalence of this specific kidney disease.

Conclusions:

• Proteinuria and HIVAN are common in HIV-infected patients.
• Proteinuria is negatively correlated with CD4+ T-cell counts and hemoglobin levels.
• Lower CD4+ counts are associated with an increased risk of albuminuria and potentially HIVAN, underscoring the need for renal monitoring in HIV care.