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Figure 1 Effects of phenylephrine (PE) treatment (100 mg/kg/day) on survival and cardiac mass in nontransgenic littermate control (NLC) mice and transgenic mice with cardiac targeted overexpression of the wild-type  1B-AR (Tg43). (A) Survival (%) in NLC (n = 15) and Tg43 (n = 27) animals after chronic PE administration. Perioperative mortality was about 10% and was not different between NLC and Tg43 mice. *p < 0.05, Tg43 versus NLC ( 2 test). (B) Heart-to-body weight ratio (mg/g) assessed after 3, 7 and 14 days of PE treatment in Tg43 and NLC mice. In order to simplify the graph, the data of the sham animals represent the average of each time point, as no difference was observed between them. *p < 0.05 versus sham phosphate-buffered saline treated mice; #p < 0.05 versus PE-treated NLC mice.
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