CXCR1 and lupus nephritis: CXC chemokine receptor CXCR1 was found to be expressed in human glomerular diseases, including crescentic glomerulonephritis, immunoglobulin A nephropathy, membranoproliferative glomerulonephritis, lupus nephritis, membranous nephropathy, and non-involved parts of tumor nephrectomies38.