M represents Fer-1 datasheet molecular weight Marker(Fermentas, #SM0671). Table 2 Western

Blot selleck chemical analysis of IgM in serum samples using s108 VP1 and s390 VP1 as antigens proteins Serum samples sum   positive negative   s108VP1 12 2 14   3 9 12 s390VP1 1 13 14   7 5 12 The data indicate the IgM detection in 14 sera from patients with acute EV71 infections by Western Blot using s108 VP1 and s390 VP1. The IgM detection in 12 sera from patients with acute CA16 infections by Western Blot using s108 VP1 and s390 VP1 is shown in italics. These 4 expressed proteins were then used to detect specific IgG antibodies by Western Blot (Figure 3) in 189 serum samples, including 141 sera collected from adults for regular health check up and 48 sera from children without acute EV infections. The serum positive rate for IgG against EV71 VP1, CA16 VP1, EV71 VP4 and CA16 VP4 were 64.55% (122/189), 75.13% (142/189), 38.10% (72/189) and 58.20% (110/189), respectively. The data indicated that the expressed

VP4s of EV71 and CA16 were of good antigenicity in the test of IgG specific antibodies. There was significant difference between the positive rates of IgG antibodies against VP1s of EV71 and CA16 (χ2 = 5.02, P < 0.05), implying that these Selleck ARRY-162 two proteins were not cross-reactive which was similar to the results from the study conducted by Shih et al [30]. The positive rates of IgG antibodies against VP4s of EV71 and CA16 (χ2 = 15.30, P < 0.01) also suggested that there was no cross-reactivity between them. The sera-positive rate of EV71 VP1 was higher than that of EV71 VP4 (χ2 = 26.47, P < 0.01) and in the same way the sera-positive rate of CA16 VP1 was higher than that of CA16 VP4 (χ2 = 16.78, P < 0.01) (Table 3), which might be associated with the position of the proteins in the capsid of the virus, that

ioxilan was VP1 was located on the outside of the capsid while VP4 was located on the inside of the capsid. The serum IgG positive rates against VP1 and VP4 of EV71 were lower than those of CA16, suggesting that the exposure rate to EV71 was lower than that to CA16 in the population. Figure 3 Part of the results of the detection of IgG against s108 (EV71) VP1 (A), s67 (EV71) VP4 (B), s390 (CA16) VP1 (C) and s401 (CA16) VP4 (D) by Western Blot. Western blot assay using goat anti-human IgG as secondary antibody. Lanes 1-10 in A, lanes 1-10 in B, lanes 1-11 in C and Lanes 1-12 in D represent immunoblotting with sera from adult for regular health check up. M represents molecular weight Marker (Fermentas, #SM0671). Table 3 Statistic analysis of the results of detection of IgG against 4 proteins by Western blot   189 sera       Negative Positive X 2 P s108 VP1 67 122     s390 VP1 47 142 5.02 P < 0.05 EV71 VP1 67 122     EV71 VP4 117 72 26.47 P < 0.