普通级与清洁级灰仓鼠脏器重量与脏器系数的比较

目的 测定并比较普通级与清洁级灰仓鼠的主要脏器重量及脏器系数的差异.方法 解剖普通级与清洁级灰仓鼠各40只,使用电子天平共测定12种脏器指标,并计算了脏器系数.结果 清洁级与普通级灰仓鼠雄性之间比较,心、肝、附睾重量有统计学意义（P＜0.01）,脑、肾脏的脏器系数差异有统计学意义（P＜0.01）;清洁级与普通级灰仓鼠雌性之间比较,心脏重量差异统计学意义（P＜0.05）,肾脏脏器系数有统计学意义（P＜0.01）;普通级灰仓鼠雄雌之间脏器系数比较,脾差异统计学意义（P＜0.05）;清洁级灰仓鼠雄雌之间脏器系数比较,心脏差异有统计学意义（P＜0.01）.结论 清洁级与普通级灰仓鼠的脏器重量、脏器系数差异较大.     

Time-series analysis of systolic blood pressure variation in thirty-three Uygur centenarians in China.

The Uygur are reported to have an unusually long life expectancy. The purpose of this research was to perform a time-series analysis of systolic blood pressure (SBP) variations in the Uygur and clarify the role of blood pressure variation (BPV) in their longevity. A cross-sectional survey was carried out in Hotan. We investigated 133 clinically healthy elderly Uygur subjects and divided them into two groups: 1) 33 Uygur centenarians in Hotan (UCH; aged > or = 100 years); and 2) 100 elderly Uygur in Hotan (UEH; aged 65-70 years). Blood pressure (BP) was monitored and analyzed with ambulatory BP monitoring. The frequency domain measures were obtained with the maximum entropy method. The mean 24-h SBP was higher in UCH than in UEH. The ratio of non-dipper type BPV was larger in the UCH than in UEH. The highest power spectral density occurred over a 12-h rather than a 24-h period in both UCH and UEH. Ultradian BPVs were more frequent in UCH than in UEH. The least square-fitting curves demonstrated that the maximum values, minimum values, and mean 24-h SBP values were higher in UCH than in UEH. The higher BP and greater number of ultradian BPVs in UCH may have been due to the greater energy expenditure for maintaining daily activities in this population. Factors such as meals, daytime naps, nocturnal micturition, decreased baroreceptor sensitivity, and arterial sclerosis may also have contributed to the higher ultradian BPVs. In conclusion, BPV in the 12-h is more dominant than in the 24-h in both UCH and UEH. BPVs in the 3-h and 4-h are more frequent in UCH than those in UEH.