中华老年心脑血管病杂志
中華老年心腦血管病雜誌
중화노년심뇌혈관병잡지
CHINESE JOURNAL OF GERIATRIC CARDIOVASCULAR AND CEREBROVASCULAR DISEASES
2014年
9期
964-966
,共3页
蒋荣%侯文婷%刘雪姣%申芳%窦爽%冷一平
蔣榮%侯文婷%劉雪姣%申芳%竇爽%冷一平
장영%후문정%류설교%신방%두상%랭일평
氧化性应激%脂褐素%丙二醛%超氧化物歧化酶%细胞衰老
氧化性應激%脂褐素%丙二醛%超氧化物歧化酶%細胞衰老
양화성응격%지갈소%병이철%초양화물기화매%세포쇠로
oxidative stress%lipofuscin%malondialdehyde%superoxide dismutase%cell aging
目的:研究限食对衰老大鼠心功能的保护作用及其机制。方法选择2月龄SD大鼠10只,随机分为衰老组和限食组(60%进食量),每组5只。2组大鼠每天皮下注射D-半乳糖100 mg/kg ,连续给药42 d建立衰老动物模型;衰老模型建立后另选5只2月龄SD大鼠设为青年组。3组行心功能检测,包括左心室内压(LVSP)、左心室舒张末压(LVEDP)、左心室压力最大上升速率(+dp/dtmax ),以及血浆丙二醛水平、超氧化物歧化酶活性和左心室心肌脂褐素水平测定。结果与青年组比较,衰老组大鼠 LVSP、+ dp/dtmax 、超氧化物歧化酶活性明显降低, LVEDP、丙二醛、脂褐素水平明显升高,差异有统计学意义(P<0.05,P<0.01);与衰老组比较,限食组 LVSP [(110.88±7.35)mm Hg(1 mm Hg=0.133 kPa) vs (70.18±19.27)mm Hg]、+ dp/dtmax [(2827.60±237.88) mm Hg/s vs (2365.66±99.81)mm Hg/s]和超氧化物歧化酶[(115.77±10.17)U/ml vs (90.10±17.11)U/ml]活性明显升高,LVEDP [(7.12±2.51)mm Hg vs (14.05±2.01)mm Hg]、丙二醛[(12.54±1.66)nmol/ml vs (15.83±2.51)nmol/ml]和脂褐素[(348.82±27.29)ng/mg vs (400.12±31.89)ng/mg]水平明显降低,差异有统计学意义( P<0.05,P<0.01)。结论衰老大鼠心功能有所降低,限食可能通过降低机体氧化应激水平,使脂褐素形成减少,从而改善衰老大鼠心功能。
目的:研究限食對衰老大鼠心功能的保護作用及其機製。方法選擇2月齡SD大鼠10隻,隨機分為衰老組和限食組(60%進食量),每組5隻。2組大鼠每天皮下註射D-半乳糖100 mg/kg ,連續給藥42 d建立衰老動物模型;衰老模型建立後另選5隻2月齡SD大鼠設為青年組。3組行心功能檢測,包括左心室內壓(LVSP)、左心室舒張末壓(LVEDP)、左心室壓力最大上升速率(+dp/dtmax ),以及血漿丙二醛水平、超氧化物歧化酶活性和左心室心肌脂褐素水平測定。結果與青年組比較,衰老組大鼠 LVSP、+ dp/dtmax 、超氧化物歧化酶活性明顯降低, LVEDP、丙二醛、脂褐素水平明顯升高,差異有統計學意義(P<0.05,P<0.01);與衰老組比較,限食組 LVSP [(110.88±7.35)mm Hg(1 mm Hg=0.133 kPa) vs (70.18±19.27)mm Hg]、+ dp/dtmax [(2827.60±237.88) mm Hg/s vs (2365.66±99.81)mm Hg/s]和超氧化物歧化酶[(115.77±10.17)U/ml vs (90.10±17.11)U/ml]活性明顯升高,LVEDP [(7.12±2.51)mm Hg vs (14.05±2.01)mm Hg]、丙二醛[(12.54±1.66)nmol/ml vs (15.83±2.51)nmol/ml]和脂褐素[(348.82±27.29)ng/mg vs (400.12±31.89)ng/mg]水平明顯降低,差異有統計學意義( P<0.05,P<0.01)。結論衰老大鼠心功能有所降低,限食可能通過降低機體氧化應激水平,使脂褐素形成減少,從而改善衰老大鼠心功能。
목적:연구한식대쇠로대서심공능적보호작용급기궤제。방법선택2월령SD대서10지,수궤분위쇠로조화한식조(60%진식량),매조5지。2조대서매천피하주사D-반유당100 mg/kg ,련속급약42 d건립쇠로동물모형;쇠로모형건립후령선5지2월령SD대서설위청년조。3조행심공능검측,포괄좌심실내압(LVSP)、좌심실서장말압(LVEDP)、좌심실압력최대상승속솔(+dp/dtmax ),이급혈장병이철수평、초양화물기화매활성화좌심실심기지갈소수평측정。결과여청년조비교,쇠로조대서 LVSP、+ dp/dtmax 、초양화물기화매활성명현강저, LVEDP、병이철、지갈소수평명현승고,차이유통계학의의(P<0.05,P<0.01);여쇠로조비교,한식조 LVSP [(110.88±7.35)mm Hg(1 mm Hg=0.133 kPa) vs (70.18±19.27)mm Hg]、+ dp/dtmax [(2827.60±237.88) mm Hg/s vs (2365.66±99.81)mm Hg/s]화초양화물기화매[(115.77±10.17)U/ml vs (90.10±17.11)U/ml]활성명현승고,LVEDP [(7.12±2.51)mm Hg vs (14.05±2.01)mm Hg]、병이철[(12.54±1.66)nmol/ml vs (15.83±2.51)nmol/ml]화지갈소[(348.82±27.29)ng/mg vs (400.12±31.89)ng/mg]수평명현강저,차이유통계학의의( P<0.05,P<0.01)。결론쇠로대서심공능유소강저,한식가능통과강저궤체양화응격수평,사지갈소형성감소,종이개선쇠로대서심공능。
Objective To study the protective effect of dietary restriction on cardiac function in ag-ing rats .Methods Ten SD rats aged 2 months were randomly divided into aging group and dieta-ry restriction (60% food intake) group (5 in each group) .An aging rat model was established by daily subcutaneous injection of D-galactose (100 mg/kg) for 42 days .Another 5 SD rats aged 2 months served as an adolecent group .The cardiac functions (including LVSP ,LVEDP ,+dp/dtmax ) were detected and the plasma MDA level ,SOD activity ,left ventricular myocardial li-pofuscin level were measured in 3 groups .Results The LVSP ,+dp/dtmax ,SOD activity were sig-nificantly lower while the LVEDP ,plasma MDA level ,myocardial lipofuscin level were signifi-cantly higher in aging group than in adolecent group (P<0 .05 ,P<0 .01) .The LVSP ,+dp/dtmax , SOD activity were significantly higher while the LVEDP ,plasma MDA level ,myocardial lipofuscin level were significantly lower in dietary restriction group than in aging group (110 .88 ± 7 .35 mmHgvs70.18±19.27mmHg,2827.60±237.88mmHg/svs2365.66±99.81mmHg/s, 115.77 ± 10 .17 U/ml vs 90 .10 ± 17 .11 U/ml ,7 .12 ± 2 .51 mm Hg vs 14 .05 ± 2 .01 mm Hg ,12 .54 ± 1 .66 nmol/ml vs 15 .83 ± 2 .51 nmol/ml ,348 .82 ± 27 .29 ng/mg vs 400 .12 ± 31 .89 ng/mg ,P<0.05 ,P<0 .01) .Conclusion The cardiac function decreases in aging rats .Dietary restriction can imporve their cardiac function by reducing the oxidative stress level and lipofuscin formation .