Electro-acupuncture on bladder-13 and -15 points attenuated chronic hypoxia-induced mean pulmonary artery pressure from 37 +/- 3 mmHg to 29 +/- 3 mmHg in rats.
Does electro-acupuncture on bladder-13 and -15 points reduce hypoxia-induced pulmonary hypertension in male Wistar rats?
Electro-acupuncture on bladder-13 and -15 points attenuates hypoxia-induced pulmonary hypertension and right ventricular hypertrophy in rats, potentially by restoring the balance of eNOS and ET-1.
Absolute Event Rate: 29% vs 37%
Pulmonary hypertension (PH) is characterized by elevated pulmonary artery pressure (PAP), pulmonary vascular remodeling and right ventricular hypertrophy, which are mainly due to endothelial dysfunction. Electro-acupuncture has shown beneficial effects on cardiovascular homeostasis, but little evidence has been obtained on pulmonary effects. The goal of the present study was to investigate whether electro-acupuncture on bladder-13 and -15 points can protect against chronic hypoxia-induced PH by regulating endothelium-derived endothelin (ET)-1 and endothelial nitric oxide synthase (eNOS). Male Wistar rats were exposed to hypoxia to induce PH. Hemodynamic analysis revealed that mean PAP was similar under normoxic conditions. Chronic hypoxia increased mean PAP to 37 +/- 3 mmHg, and electro-acupuncture attenuated it to 29 +/- 3 mmHg. Absolute right ventricular weight was ameliorated by electro-acupuncture from 0.288 +/- 0.048 g to 0.228 +/- 0.029 g under hypoxic conditions. Hypoxia-induced right ventricular hypertrophy index decreased from 0.477 +/- 0.069 to 0.378 +/- 0.053 with electro-acupuncture treatment. Histological examination revealed that hypoxic rats showed increased medial pulmonary artery wall thickness as well as muscularization. However, these alternations by chronic hypoxia were attenuated by electro-acupuncture. There was no difference in eNOS or ET-1 between groups under normoxic conditions. Electro-acupuncture treatment significantly improved the circulating eNOS concentration (365.36 +/- 31.51 pg/mL) compared with only hypoxia exposure (247.60 +/- 30.64 pg/mL). In lung homogenate, levels of eNOS under hypoxia increased from 684.96 +/- 117.90 to 869.86 +/- 197.61 pg/mg by electro-acupuncture treatment. Levels of ET-1 changed oppositely to eNOS in response to electro-acupuncture (ET-1 in plasma, 29.44 +/- 2.09 versus 20.70 +/- 2.37 pg/mL; ET-1 in lung homogenate, 120.51 +/- 3.03 versus 110.60 +/- 4.04 pg/mg). In conclusion, these results indicated that treatment with electro-acupuncture can protect against hypoxia-induced PH, possibly by regulating the balance of endothelium-derived vasoconstrictors and vasodilators.
Pan et al. (Sat,) conducted a other in hypoxia-induced pulmonary hypertension. electro-acupuncture on bladder-13 and -15 points vs. hypoxia exposure only was evaluated on mean pulmonary artery pressure (PAP). Electro-acupuncture on bladder-13 and -15 points attenuated chronic hypoxia-induced mean pulmonary artery pressure from 37 +/- 3 mmHg to 29 +/- 3 mmHg in rats.