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- W2034779508 abstract "동맥경화 상태에서는 혈관이 수축물질에 예민하게 반응함으로써 혈압의 급격한 변화에 대한 회복능력이 저하한다. 한편 뽕나무 잎에는 고지방식의 섭취로 인해 발생하는 동맥경화증의 발달을 감소시킬 가능성이 있는 여러 물질이 있다고 추정된다. 뽕나무 잎을 백서에 투여하면 고지방식에 의해 유발된 혈관이 예민해지는 현상을 감소시킬 수 있는지 시험하기 위하여 고지방식 및 뽕나무잎을 8주간 투여하고 혈관수축 물질에 대한 혈압의 반응성을 시험하였다. 순환기반사에 따른 혈압반응 감수성차이를 최소화할 목적으로 동물의 중추신경계를 파괴(pithing)하고 시험하였다. 고콜레스테롤을 함유한 식이를 공급한 백서에서 교감신경계 전기자극이나 norepinephrine, phenylephrine, angiotensin II 및 vasopressin 등의 투여로 유발된 혈압상승반응이 증강되었으며, 사료에 뽕잎을 2% 또는 10% 첨가하면 정상적인 혈압상승반응을 보여주었다. 교감신경계를 파괴하지 않은 채 마취만 한 백서에서는 고콜레스테롤에 의한 반응증강이나 뽕잎에 의한 변화를 관찰할 수 없었다. 이 결과로 부터 뽕잎이 동맥경화에서 나타나는 혈관반응성 변화를 방지하는 데 유용한 것으로 판단할 수 있을 것이다. In atherosclerosis, blood vessels become sensitive to vessel-constricting agents leading to reduced control in the event of abrupt blood pressure changes. Mulberry trees (Morus alba L., MA) have been claimed to contain various bioactive principles that could possibly prevent atherosclerosis development caused by high cholesterol consumption. In order to examine whether MA feeding can prevent the sensitization of blood vessels, MA leaves were fed to rats for 8 weeks and pressor responses to vasoconstricting agents were assessed. Animals were pithed before blood pressure assessments to eliminate reflex compensation in vessel responses. Feeding diets containing high levels of cholesterol led to potentiated pressor responses to sympathetic nerve stimulation, or to injection of norepinephrine, phenylephrine, angiotensin II and vasopressin in pithed rats. These potentiated pressor responses were prevented in rats fed MA leaf-containing diets at 2 or 10% levels. It was also examined in anesthetized non-pithed rats whether similar cholestrol-related sensitization and MA prevention could be observed. However, high cholesterol-induced sensitization in pressor responses were not observed, suggesting that destruction of central cardiovascular control by pithing must have revealed the sensitization responses. It was concluded that MA leaves seem to be active in preventing abnormal blood vessel reactivity caused by hypercholesterolemia." @default.
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- W2034779508 title "Effects of White Mulberry (Morus alba) Leaves on Blood Vessel Reactivity in Hyperchloesterolemic Rats" @default.
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