BACKGROUND: For vendor-derived mice, an acclimation period of 1 week is usually recommended before blood pressure measurements are started. However, we observed hypertension in wild-type vendor-derived mice 1 week after shipping. METHODS: The index group (n = 12, BALB/c, age 3 months, weight 26-28 g) was shipped overnight (by truck, duration 13 h). Tail-cuff systolic blood pressures (SBPs) of the index group were compared to two control groups (n = 6/group), one acclimated for 3 weeks after shipping, and one derived from an in-house colony. RESULTS: One week after shipping, SBP in the index group was 141 ± 3 mm Hg. Because this was much higher than reported previously for this strain, acclimation was prolonged. Six weeks after shipping, SBP had fallen to 124 ± 3 mm Hg (P < 0.005). During this time, heart rate also fell from 721 ± 15 to 665 ± 13 bpm (P < 0.01). SBP in the two control groups was also lower than in the index group 1 week after shipping, including the group acclimated for 3 weeks (129 ± 3 vs. 141 ± 3 mm Hg, P < 0.05) and the in-house mice (124 ± 3 vs. 141 ± 3 mm Hg, P < 0.005). CONCLUSIONS: Vendor-derived mice are hypertensive 1 week after shipping, become normotensive after 3 weeks, but do not return to levels of in-house mice until after 6 weeks. Acclimation periods of at least 3 weeks are required when measuring blood pressure in mice.
BACKGROUND: For vendor-derived mice, an acclimation period of 1 week is usually recommended before blood pressure measurements are started. However, we observed hypertension in wild-type vendor-derived mice 1 week after shipping. METHODS: The index group (n = 12, BALB/c, age 3 months, weight 26-28 g) was shipped overnight (by truck, duration 13 h). Tail-cuff systolic blood pressures (SBPs) of the index group were compared to two control groups (n = 6/group), one acclimated for 3 weeks after shipping, and one derived from an in-house colony. RESULTS: One week after shipping, SBP in the index group was 141 ± 3 mm Hg. Because this was much higher than reported previously for this strain, acclimation was prolonged. Six weeks after shipping, SBP had fallen to 124 ± 3 mm Hg (P < 0.005). During this time, heart rate also fell from 721 ± 15 to 665 ± 13 bpm (P < 0.01). SBP in the two control groups was also lower than in the index group 1 week after shipping, including the group acclimated for 3 weeks (129 ± 3 vs. 141 ± 3 mm Hg, P < 0.05) and the in-house mice (124 ± 3 vs. 141 ± 3 mm Hg, P < 0.005). CONCLUSIONS: Vendor-derived mice are hypertensive 1 week after shipping, become normotensive after 3 weeks, but do not return to levels of in-house mice until after 6 weeks. Acclimation periods of at least 3 weeks are required when measuring blood pressure in mice.
Authors: Minjie Feng; Steven Whitesall; Yunyu Zhang; Martin Beibel; Louis D'Alecy; Keith DiPetrillo Journal: Am J Hypertens Date: 2008-10-09 Impact factor: 2.689
Authors: Minjie Feng; Marion E Deerhake; Ryan Keating; Jill Thaisz; Lingfei Xu; Shirng-Wern Tsaih; Randy Smith; Taiichiro Ishige; Fumihiro Sugiyama; Gary A Churchill; Keith DiPetrillo Journal: Hypertension Date: 2009-08-03 Impact factor: 10.190
Authors: James M Antonini; Vamsi Kodali; Terence G Meighan; Katherine A Roach; Jenny R Roberts; Rebecca Salmen; Greg R Boyce; Patti C Zeidler-Erdely; Michael Kashon; Aaron Erdely; Mohammad Shoeb Journal: Sci Rep Date: 2019-02-13 Impact factor: 4.379