镓盐对维甲酸致骨质疏松大鼠骨代谢生化指标的影响

目的 观察镓盐对维甲酸致骨质疏松动物模型血、尿中相关生化指标的影响.方法 用维甲酸建立大鼠骨质疏松模型后,实验分为4组正常组(6只),骨质疏松组(6只),正常喂养;氯化镓治疗组(9只),25mg/(kg*d)氯化镓灌胃;雌激素治疗组(6只),给予雌激素0.2μg/kg,3次/周,腹腔注射,治疗2个月.结果 模型期骨质疏松组平均骨小梁宽度变窄,平均骨小梁间距变大,平均骨皮质厚度变薄,骨小梁百分比降低,血清碱性磷酸酶(AKP)和抗酒石酸酸性磷酸酶(TRAP)活性显著增高;镓盐及雌激素治疗后,平均骨皮质厚度变宽,骨小梁百分比增加,且可使显著增高的AKP和TRAP活性降低到接近正常组水平,骨钙素(BGP)呈上升趋势,而尿羟脯氨酸排泄量明显低于骨质疏松组.结论 镓盐具抑制破骨细胞的功能,并影响成骨细胞的活性.     

丹参酮对去卵巢大鼠牙槽骨丢失的抑制作用

目的探讨丹参酮对去卵巢大鼠牙槽骨丢失的抑制作用。方法 SD大鼠随机分为对照组、去卵巢组和丹参酮治疗组。实验90 d后取大鼠牙槽骨,测量牙槽骨组织形态计量学参数、牙槽骨组织中碱性磷酸酶(ALP)和抗酒石酸酸性磷酸酶(TRAP)活性。结果与去卵巢组相比,丹参酮治疗组牙槽骨骨量明显增多,%Tb.Ar升高33.33%(P<0.05);牙槽骨组织中ALP阳性的成骨细胞数升高了51.38%(P<0.05);TRAP阳性的破骨细胞数减少27.27%(P>0.05)。结论丹参酮能促进牙槽骨骨形成和抑制骨吸收,防治牙槽骨骨质疏松。     

复合振动仪治疗骨质疏松对骨代谢影响的临床观察

目的 观察复合振动仪治疗骨质疏松(OP)对骨代谢的影响.方法 70例OP志愿者随机分成复合振动组和对照组,每组35例.复合振动组采用自行研制的复合振动仪进行全身振动治疗,振动频率45～55 Hz,振动强度0.5～0.8 g,1次/隔天,30 min/次,连续3个月,对照组不进行任何干预,于试验开始前3天、试验后第1、3个月分别检测各组碱性磷酸酶(ALP)、骨钙素(OC)、抗酒石酸酸性磷酸酶(TRAP)、钙磷乘积([Ca]×[P])的变化.结果 第3个月,复合振动组的ALP、OC、TRAP、[Ca]×[P]分别比试验前增加了44.6%、-9.4%、1.7%、7.5%,对照组的相应指标分别比试验前增加了22.8%、-13.3%、3.6%、4.7%,P值分别为0.108、0.788、0.606、0.171.结论 复合振动仪治疗OP对骨代谢的影响无统计学意义,但骨代谢的绝对值有变化.     

补肾中药对维甲酸致骨质疏松大鼠多指标的影响

目的　了解补肾方药对维甲酸造成的骨质疏松大鼠的治疗作用。方法　应用维甲酸 70 mg/ kg· d- 1 ,诱发大鼠的骨质疏松 ,同时分别给予补肾中药和维生素 D3(VD3) ,观察大鼠血钙、磷、碱性磷酸酶 (ALP)、雌二醇和尿羟脯氨酸、骨密度、骨灰重、肠钙吸收、骨组织形态、肠道Ca Bp- D9k m RNA多指标的变化。结果　补肾方药能增加维甲酸致骨质疏松大鼠的骨密度、骨灰重、肠钙吸收和肠道 Ca Bp- D9k m RNA的表达 ,并能升高血钙和雌二醇 ,降低血磷、血 ALP和尿羟脯氨酸。结论　补肾方药对维甲酸造成的骨代谢异常有一定的改善作用。     

健骨胶囊对去卵巢骨质疏松大鼠血清碱性磷酶、血清骨钙素含量的影响

本实验观察了健骨胶囊对去卵巢骨质疏松模型大鼠〔1〕血清AL p和BGP水平的影响。1　材料和方法1.1　动物　Wistar大鼠5 0只,雌性,体重2 0 0～2 5 0 kg(长春高新医学实验动物研究中心提供,合格证号:10 - 5 113)。1.2 　方法1.2 .1　药品与仪器　健骨胶囊:规格:0 .3g/粒,含生药量5 .6kg/ g。碱性磷酸酶( AL P)测试药盒:中生北控生物科技股份有限公司提供。骨钙素( BGP)放免测试药盒:解放军总医院科技开发中心放免研究提供。生化分析仪( BA- 90 ) :深圳迈瑞公司产品。微量电子天平:MP1- 12 0 ,上海第二天平仪器厂。γ-计数仪( FJ- 2 0 …     

血清骨特异性酸性磷酸酶的临床意义

血清抗酒石酸酸性磷酸酶 5b(TRAP 5b)是反映骨吸收的一种标志物。本研究结果显示正常绝经后妇女血清TRAP 5b水平高于正常绝经前妇女 (P <0 .0 5 ) ,绝经后骨质疏松的妇女高于正常绝经后妇女 (P <0 .0 5 ) ,骨折、糖尿病、肾病等患者高于相应的对照者 (P <0 .0 5或P <0 .0 1)。     

镓盐对骨质疏松大鼠细胞凋亡和基因组DNA含量及分子量的影响

目的观察镓盐对维甲酸致大鼠骨质疏松动物模型细胞凋亡和基因组DNA含量、分子量的影响.方法用维甲酸灌胃建立大鼠骨质疏松模型,实验组分为四组正常对照组(18只);骨质疏松组(18只);氯化镓治疗组(19只),给予25mg/(kg·d)氯化镓灌胃;雌激素治疗组(12只),给予苯甲酸雌二醇0.2μg/kg,3次/周,腹腔注射.实验进行30 d.用琼脂糖电泳法检测骨组织基因组细胞凋亡、含量及分子量.结果骨质疏松组大鼠骨细胞凋亡增加,DNA含量减少,分子量降低,肝组织脂质过氧化物(MDA)含量增加;镓盐治疗组骨细胞凋亡明显减轻,DNA含量增加,分子量增大,肝组织MDA含量下降.结论镓盐可抑制脂质过氧化反应,进而抑制细胞凋亡,促进骨形成.     

仙珍骨宝对维甲酸致大鼠骨质疏松的影响

目的 探讨仙珍骨宝对维甲酸致大鼠骨质疏松的影响.方法 4月龄未交配的SPF级雌性SD大鼠24只,随机分成正常对照组、维甲酸组、仙珍骨宝组,持续给药28 d.大鼠处死后取股骨进行骨密度的测量,取第4腰椎进行生物力学参数测量,取胫骨上段测定骨形态计量学参数.结果 仙珍骨宝组腰椎生物力学指标均高于维甲酸模型组(P<0.05),但股骨骨密度和胫骨上段骨形态计量学参数与维甲酸模型组无明显差别(P>0.05).结论 仙珍骨宝可对抗维甲酸致大鼠腰椎生物力学性能的降低,但对骨密度和骨形态计量学参数无明显影响.     

氯化镓治疗去卵巢大鼠骨质疏松的实验观察

目的 探讨镓对去卵巢大鼠骨质疏松的治疗作用。方法 通过切除大鼠卵巢建立骨质疏松模型，经氯化镓治疗12周后，用单光子法测量骨密度；放免法检测相关血清学指标；测定骨病理形态学指标。结果 氯化镓治疗组血清抗酒石酸酸性磷酸酶、骨小梁间距低于骨质疏松对照组，而骨密度和骨小梁宽度高于骨质疏松对照组。结论 镓对去卵巢所致大鼠的骨质疏松有效。     

硒对硝酸镓治疗大鼠骨质疏松的骨镓沉积阻止作用的实验研究

目的探讨硒对硝酸镓治疗骨质疏松的骨镓沉积的阻止作用。方法将骨组织溶于盐酸溶液,处理后在波长557．0 nm测定其吸光度以计算含镓量,在422．7 nm测定其吸光度以计算含钙量;用钼蓝比色法测定含磷量:用材料试验机作三点弯曲试验测定骨强度。结果骨质疏松组与对照组相比,骨钙、磷均有明显下降。硝酸镓治疗组骨含镓量明显升高,但镓硒联合治疗组骨含镓量明显低于单纯硝酸镓治疗组。结论硒对硝酸镓治疗骨质疏松的骨镓沉积有阻止作用。     

Serum Alkaline Phosphatase Levels and Increased Risk of Brain Hemorrhage in Hemodialysis Patients: The Q-Cohort Study

Aim: Elevated serum alkaline phosphatase (ALP) levels have been associated with increased risks of all-cause and cardiovascular mortality in patients receiving hemodialysis. However, little is known about the impact of serum ALP levels on the development of stroke, such as brain hemorrhage and infarction. Methods: A total of 3,497 patients receiving maintenance hemodialysis registered in the multicenter observational Q-Cohort Study were analyzed. The primary outcomes were the incidences of brain hemorrhage and infarction. The covariate of interest was serum ALP levels. Patients were divided into tertiles based on their serum ALP levels (U/L) at baseline (T1, ＜69.3; T2, 69.3–98.4; T3, ＞98.4). The risks of brain hemorrhage, brain infarction, and composite stroke were estimated using Cox proportional hazards models and competing risk models with all-cause death as a competing risk. Results: A total of 89 patients developed brain hemorrhage and 195 patients developed brain infarction during the 4-year follow-up period. The risk of brain hemorrhage in the highest tertile (T3) was significantly higher than that in the lowest tertile (T1) (multivariable-adjusted hazard ratio [95% confidence interval], 1.93 [1.12–3.35], subdistribution hazard ratio, 1.91 [1.10–3.30]). However, there was no significant association between serum ALP levels and the risk of brain infarction or composite stroke. Conclusions: Higher serum ALP levels are associated with an increased risk of brain hemorrhage, but not brain infarction, in patients receiving maintenance hemodialysis. High serum ALP level is thus an important risk factor for brain hemorrhage in hemodialysis patients.     

Local Effects of a 1940 nm Thulium-Doped Fiber Laser and a 1470 nm Diode Laser on the Pulmonary Parenchyma: An Experimental Study in a Pig Model

The lungs are a common site of metastases from malignant tumors. Their removal with a minimal but safe tissue margin is essential for the long-term survival of patients. The aim of this study was to evaluate the usefulness of a 1940 nm thulium-doped fiber laser (TDFL) and a 1470 nm diode laser (DL) in a pig model of lung surgery that involved the incision and excision of lung tissue. Histopathological analysis was performed on days 0 and 7 after surgery. Neither TDFL nor DL caused significant perioperative or postoperative bleeding. Histological analysis revealed the presence of carbonized necrotic tissue, mixed fibrin–cellular exudate in the superficial zone of thermal damage and bands of deeper thermal changes. The mean total width of thermal damage on day 0 was 499.46 ± 61.44 and 937.39 ± 109.65 µm for TDFL and DL, respectively. On day 7, cell activation and repair processes were visible. The total width of thermal damage was 2615.74 ± 487.17 µm for TDFL vs. 6500.34 ±1118.02 µm for DL. The superficial zone of thermal damage was narrower for TDFL on both days 0 and 7. The results confirm the effectiveness of both types of laser in cutting and providing hemostasis in the lungs. TDFL caused less thermal damage to the lung parenchyma than DL.     

Effects of mixed nut consumption on LDL cholesterol,lipoprotein(a), and other cardiometabolic risk factors in overweight and obese adults

Background and aimsElevated LDL-C, lipoprotein(a) [Lp(a)], and inflammation are associated with greater risk for atherosclerotic cardiovascular events. Consumption of individual nut types decreases these risk factors but knowledge about the effect of mixed nuts on Lp(a) is limited. The objective of this study was to determine the effects of consuming 42.5 g/day of mixed nuts on LDL-C, Lp(a), and inflammatory markers in individuals with overweight or obesity.Methods and resultsIn a 16-week randomized control trial, 29 participants with overweight or obesity (BMI 25–40 kg/m²) consumed either 42.5 g/day of mixed nuts (cashews, almonds, macadamia nuts, Brazil nuts, pecans, pistachios, walnuts, and peanuts) or 69 g/day isocaloric pretzels. Blood samples were collected at baseline, week 8, and week 16 for analysis on total cholesterol (TC), LDL-C, Lp(a), inflammation markers, glucose, insulin, adiponectin and liver function enzymes. No significant differences were seen in TC, LDL-C, HDL-C, Lp(a), or liver function enzymes between the two groups. Participants consuming mixed nuts had significantly lower body fat percentage and diastolic blood pressure, and higher adiponectin (all P ≤ 0.05). C-reactive protein (CRP) and 8-oxo-deoxyguanosis (8-oxodG) showed non-significant decreasing trends and total antioxidant capacity (TAC) had a non-significant increasing trend in the mixed nut group.ConclusionConsumption of mixed nuts had no evidence of an effect on LDL-C or Lp(a) throughout the intervention. Notably, mixed nut consumption lowered body fat percentage without significant changes in body weight or BMI. Future studies with larger sample sizes investigating the changing trends of CRP, 8-oxodG, and TAC are warranted.Clinical trial registerNCT03375866.