Effects of Lonicera caerulea and heat stress-treated male mice on Hsp70 expression in testis. The expression level of Hsp70 was highest in the HS group compared to the control group, and the expression level of Hsp70 was increased in the HB + HS group compared with the expression level of b-actin. In addition, the HS group increased the amount of Hsp70 expression in order to protect the testicular tissue by heat stress. Similarly, the HB + HS group also increased Hsp70, but the testes were protected by HB, so the Hsp70 expression was relatively low compared to the HS group. The HB group showed a similar expression level to the control group. This means that HB does not directly affect Hsp70. There are no significant differences. Values are the mean ± SD of 4 mouse groups (SPSS, LSD, Dunnett T3, n = 20).