LAMP2 and polyarteritis nodosa: More interestingly, serum anti-LAMP-2 antibody levels were significantly increased in PAN patients compared with AAV and TA patients (PAN vs. AAV: (154.34 ± 54.65) vs. (107.90 ± 41.13) ng/ml, P < 0.001; PAN vs. TA: (154.34 ± 54.65) vs. (94.98 ± 54.65) ng/ml, P=0.001) (Figure 3(d)).