Autoantibody profiling of patients with primary biliary cirrhosis using a multiplexed line-blot assay

作者：Villalta Danilo^*; Sorrentino Maria Concetta; Girolami Elia; Tampoia Marilina; Alessio Maria Grazia; Brusca Ignazio; Daves Massimo; Porcelli Brunetta; Barberio Giuseppina; Bizzaro Nicola

来源：Clinica Chimica Acta, 2015, 438: 135-138.

DOI：10.1016/j.cca.2014.08.024

• Anti-mitochondrial autoantibodies (AMA)
• sp100
• gp210
• Multiple nuclear dots (MND)
• Membranous/rim-like
• Autoantibodies

Objective: To evaluate the autoantibody profile in patients with primary biliary cirrhosis (PBC) using a new multiplexed line-blot assay specifically designed for the diagnosis of autoimmune liver diseases.
Methods: Sera of 58 consecutive PBC patients and 191 disease controls (144 with autoimmune liver diseases other than PBC, and 67 with non-autoimmune chronic liver diseases) were tested by both the multiplexed line-blot Autoimmune Liver Disease Profile 2 (ALD2) and by IIF on HEp-2 cells and on rat kidney/liver/stomach tissues. ALD2 contains the following PBC-associated antigens: AMA-M2, natively purified from bovine heart; M2-E3, a recombinant fusion protein including the E2 subunits of PDC, BCOADC and OGDC; sp100, PML and gp210 recombinant proteins.
Results: With the ALD2 assay, a positive reaction to AMA-M2, M2-E3, sp100, PML and gp210 in PBC patients was observed in 77.6%, 84.5%, 34.5%, 15.1% and 18.9%, respectively, of the PBC sera. The overall sensitivity and specificity for PBC were 98.3% and 93.7%. Using IIF, positivity rates to AMA, and to antinuclear autoantibodies with membranous/rim-like and multiple nuclear dot patterns were 862%, 8.6% and 22.4%, respectively. The overall sensitivity and specificity for PBC of the IIF method were 86.2% and 97.9%, respectively.
Conclusions: The ALD2 line-blot showed a good diagnostic accuracy for PBC and a higher sensitivity than the IIF method to detect sp100 and gp210 autoantibodies.

• 出版日期2015-1-1