@article{oai:rakuno.repo.nii.ac.jp:00006445,
 author = {ITAMI, Takaharu and 伊丹, 貴晴 and HANAZONO, Kiwamu and 華園, 究 and Oyama, Norihiko and Sano, Tadashi and MAKITA, Kohei and 蒔田, 浩平 and YAMASHITA, Kazuto and 山下, 和人},
 issue = {7},
 journal = {PLOS ONE},
 month = {Jul},
 note = {Article, In acidosis, catecholamines are attenuated, and higher doses are often required to improve cardiovascular function. Colforsin activates adenylate cyclase in cardiomyocytes without beta-adrenoceptor. Here, six beagles were administered colforsin or dobutamine four times during eucapnia (partial pressure of arterial carbon dioxide 35-40 mm Hg; normal) and hypercapnia (ibid 90-110 mm Hg; acidosis) conditions. The latter was induced by CO_2 inhalation. Anesthesia was induced with propofol and maintained with isoflurane. Cardiovascular function was measured by thermodilution and a Swan-Ganz catheter at baseline and 60 min after 0.3 μg/kg/min (low), 0.6 μg/kg/min (middle), and 1.2 μg/kg/min (high) colforsin administration. The median pH was 7.38 [range 7.33-7.42] and 7.01 [range 6.96-7.08] at baseline in the Normal and Acidosis conditions, respectively. Endogenous adrenaline and noradrenaline levels at baseline were significantly (P < 0.05) higher in the Acidosis than in the Normal condition. Colforsin induced cardiovascular effects similar to those caused by dobutamine. Colforsin increased cardiac output in the Normal condition (baseline: 3.9 ± 0.2 L/kg/m^2 [mean ± standard error], low: 5.2 ± 0.4 L/kg/min2, middle: 7.0 ± 0.4 L/kg/m^2, high: 9.4 ± 0.2 L/kg/m^2; P < 0.001) and Acidosis condition (baseline: 6.1 ± 0.3 L/kg/m^2, low: 6.2 ± 0.2 L/kg/m^2, middle: 7.2 ± 0.2 L/kg/m^2, high: 8.3 ± 0.2 L/kg/m^2; P < 0.001). Colforsin significantly increased heart rate and decreased systemic vascular resistance compared to values at baseline. Both drugs increased pulmonary artery pressure, but colforsin (high: 13.3 ± 0.6 mmHg in Normal and 20.1 ± 0.2 mmHg in Acidosis) may have lower clinical impact on the pulmonary artery than dobutamine (high: 19.7 ± 0.6 in Normal and 26.7 ± 0.5 in Acidosis). Interaction between both drugs and experimental conditions was observed in terms of cardiovascular function, which were similarly attenuated with colforsin and dobutamine under acute respiratory acidosis.},
 pages = {e0213414-1--e0213414-14},
 title = {Cardiovascular effects of intravenous colforsin in normal and acute respiratory acidosis canine models : A dose-response study},
 volume = {14},
 year = {2019}
}