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Lupus. 1998;7(3):154-8.

Renal expression of IL-6 and TNFalpha genes in lupus nephritis.

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Immunotechnology Unit, CBE, UAZ, Guadalupe Zac, Mexico.


These studies were carried out to examine the presence of the inflammatory cytokines IL-6 and TNFalpha in kidneys of patients with lupus nephritis as an indicator of their possible role in its pathogenesis. A total of 19 kidney biopsies from patients with type III or IV lupus nephritis were processed by direct immunofluorescence using monoclonal anti-IL-6 and TNFalpha antibodies. Local expression of these genes was demonstrated both by in situ hybridization and by reverse transcriptase-PCR amplification of total RNA isolated from kidney tissue. Fifty-two percent of the biopsies exhibited IL-6 and TNFalpha deposited along the glomeruli and tubules; in situ expression of these cytokines was demonstrated in 6 biopsies with type IV, and 1 with type III nephritis. Inflammatory cytokines are actively synthesized in the kidneys of patients with lupus nephritis and therefore, may play a role in its pathogenesis.

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