title: Protective effect of total flavonoids of seabuckthorn (Hippophae rhamnoides) in simulated high-altitude polycythemia in rats.
abstract: Seabuckthorn (Hippophae rhamnoides L.) has been used to treat high altitude diseases. The effects of five-week treatment with total flavonoids of seabuckthorn (35, 70, 140 mg/kg, ig) on cobalt chloride (5.5 mg/kg, ip)- and hypobaric chamber (simulating 5,000 m)-induced high-altitude polycythemia in rats were measured. Total flavonoids decreased red blood cell number, hemoglobin, hematocrit, mean corpuscular hemoglobin levels, span of red blood cell electrophoretic mobility, aggregation index of red blood cell, plasma viscosity, whole blood viscosity, and increased deformation index of red blood cell, erythropoietin level in serum. Total flavonoids increased pH, pO₂, Sp(O₂), pCO₂ levels in arterial blood, and increased Na⁺, HCO₃⁻, Cl⁻, but decreased K⁺ concentrations. Total flavonoids increased mean arterial pressure, left ventricular systolic pressure, end-diastolic pressure, maximal rate of rise and decrease, decreased heart rate and protected right ventricle morphology. Changes in hemodynamic, hematologic parameters, and erythropoietin content suggest that administration of total flavonoids from seabuckthorn may be useful in the prevention of high altitude polycythaemia in rats.
authors.affiliation: Base for Drug Clinical Trial, Xinqiao Hospital, Third Military Medical University, Chongqing 400037, China.
authors.forename: Ji-Yin
authors.initials: JY
authors.lastname: Zhou
authors.forename: Shi-Wen
authors.initials: SW
authors.lastname: Zhou
authors.forename: Xiao-Huang
authors.initials: XH
authors.lastname: Du
authors.forename: Sheng-Ya
authors.initials: SY
authors.lastname: Zeng
mesh_terms: D000531:Altitude; D000532:Altitude Sickness / Q000097:blood / Q000150:complications; D000818:Animals; D001784:Blood Gas Analysis; D004195:Disease Models, Animal; D004909:Erythrocyte Indices; D004921:Erythropoietin / Q000097:blood; D005419:Flavonoids / Q000494:pharmacology*; D006352:Heart Ventricles / Q000187:drug effects / Q000473:pathology; D006439:Hemodynamics / Q000187:drug effects; D031281:Hippophae / Q000737:chemistry*; D008297:Male; D011086:Polycythemia / Q000097:blood / Q000209:etiology / Q000517:prevention & control*; D020011:Protective Agents / Q000494:pharmacology*; D051381:Rats; D017208:Rats, Wistar
chemical_list: D005419:Flavonoids; D020011:Protective Agents; D004921:Erythropoietin