Androgen and bone mass in men

<abstract>Androgens have multiple actions on the skeleton throughout life. Androgens promote skeletal growth and accumulation of minerals during puberty and adolescence and stimulate osteoblast but suppress osteoclast function, activity and lifespan through complex mechanisms. Also androgens increase periosteal bone apposition, resulting in larger bone size and thicker cortical bone in men. There is convincing evidence to show that aromatization to estrogens was an important pathway for mediating the action of testosterone on bone physiology. Estrogen is probably the dominant sex steroid regulating bone resorption in men, but both testosterone and estrogen are important in maintaining bone formation.

CHIP regulates bone mass by targeting multiple TRAF family members in bone marrow stromal cells

Carboxyl terminus of Hsp70-interacting protein（CHIP or STUB1） is an E3 ligase and regulates the stability of several proteins which are involved in different cellular functions. Our previous studies demonstrated that Chip deficient mice display bone loss phenotype due to increased osteoclast formation through enhancing TRAF6 activity in osteoclasts. In this study we provide novel evidence about the function of CHIP. We found that osteoblast differentiation and bone formation were also decreased in Chip KO mice. In bone marrow stromal（BMS） cells derived from Chip^-/- mice, expression of a panel of osteoblast marker genes was significantly decreased. ALP activity and mineralized bone matrix formation were also reduced in Chip-deficient BMS cells. We also found that in addition to the regulation of TRAF6, CHIP also inhibits TNFα-induced NF-κB signaling through promoting TRAF2 and TRAF5 degradation. Specific deletion of Chip in BMS cells downregulated expression of osteoblast marker genes which could be reversed by the addition of NF-κB inhibitor. These results demonstrate that the osteopenic phenotype observed in Chip^-/- mice was due to the combination of increased osteoclast formation and decreased osteoblast differentiation. Taken together, our findings indicate a significant role of CHIP in bone remodeling.

NUMB maintains bone mass by promoting degradation of PTEN and GLI1 via ubiquitination in osteoblasts

The adaptor protein NUMB is involved in asymmetric division and cell fate determination and recognized as an antagonist of Notch.Previous studies have proved that Notch activation in osteoblasts contributes to a high bone mass. In this study, however, an osteopenic phenotype was found in 9-week-old mice using osteoblastic specific Col1a1–2.3-Cre to ablate both Numb and its homologue Numbl. The trabecular bone mass decreased dramatically while the cortical bone mass was unaffected. Here, the Notch signal was not activated,while the tensin homologue deleted on human chromosome 10(PTEN), which dephosphorylates phosphatidylinositide 3-kinases, was elevated, attenuating protein kinase B(Akt). The ubiquitination assay revealed that NUMB may physiologically promote PTEN ubiquitination in the presence of neural precursor cell-expressed developmentally downregulated protein 4–1. In addition, the deficiency of Numb/Numbl also activated the Hedgehog pathway through GLI1. This process was found to improve the ratio of the receptor activator of nuclear factor-k B ligand to osteoprotegerin, which enhanced the differentiation of osteoclasts and bone resorption. In conclusion, this study provides an insight into new functons of NUMB and NUMBL on bone homeostasis.

Spectrum-effect relationship between HPLC fingerprints and bioactive components of Radix Hedysari on increasing the peak bone mass of rat

The traditional Chinese medicine of Radix Hedysari plays an important role in invigorating gas for ascending, benefiting blood for promoting production of fluid, and promoting circulation for removing obstruction in collaterals, which is consistent with the principle of treatment for osteoporosis. This study is designed to investigate the bioactive components on increasing peak bone mass (PBM) by exploring the spectrum-effect relationship between chromatography fingerprints and effect. Multiple indicators are selected to evaluate the pharmacological activity. In fingerprints, 21 common peaks are obtained, five of which are identified. Furthermore, gray relational analysis (GRA) is a quantitative method of gray system theory and is used to describe the correlation degree of common peaks and pharmacological activities with relational value. 21 components are then divided into three different regions, of which ononin and calycosin play an extremely significant role in increasing PBM. In addition, factor analysis and hierarchical cluster analysis (HCA) are used to screen the optimal producing area for Radix Hedysari. This provides a comprehensive and efficient method to improve the quality evaluation of Radix Hedysari, confirming the bioactive components for PBM-enhancement and further develop its medicinal value.

Clinical correlations between chronic hepatitis C infection and decreasing bone mass density after treatment with interferon-alpha

Objective: To compare the bone mass density in chronic hepatitis patients before and after interferon-a treatment.Methods: A total of 70 patients with chronic hepatitis C were treated with interferon-a and were evaluated. The treatment dosage was three million IU three times a week for one year. All the patients underwent bone mass density detection at lumbar spine and femoral neck before and after the interferon-a treatment. All the necessary information such as age,sex, and laboratory test, history of occurrence of fractures, lifestyle, and menopause status was collected by interviewers face-to-face from participants at the research visit. Smoking was categorized by whether participants were nonsmokers or smokers. Menopause was designated if there had been complete cessation of menses for more than 12 months. All statistical analyses were performed by SPSS version 14(SPSS, Inc., Chicago, IL, USA).Results: Among 70 patients, 52% were male, 48% were female and the mean age was(57.0 ± 9.6) years(range: 24–79). Twenty-nine percent of the patients had a history of smoking. The mean body mass index was(24.4 ± 3.6) kg/m^2(range: 18.4–35.3). Of the70 cases, 21 had high fibrosis-4. The prevalence of overall fracture history was 2.9%(two patients).Conclusions: Chronic hepatitis C virus infection did increase the risk of development of metabolic bone disease in this cohort. Indeed, greater reduction of bone mass density occurs in advanced liver fibrosis. The bone loss in earlier stages of chronic hepatitis C infection is likely to result from increased bone reduction rather than decreased bone formation. Overall, these observations suggest an important role for chronic hepatitis C virus infection in increased bone turnover in osteodystrophy pathogenesis.

Administration of soluble activin receptor 2B increases bone and muscle mass in a mouse model of osteogenesis imperfecta

Osteogenesis imperfecta（OI） comprises a group of heritable connective tissue disorders generally defined by recurrent fractures, low bone mass, short stature and skeletal fragility. Beyond the skeletal complications of OI,many patients also report intolerance to physical activity, fatigue and muscle weakness. Indeed, recent studies have demonstrated that skeletal muscle is also negatively affected by OI, both directly and indirectly. Given the well-established interdependence of bone and skeletal muscle in both physiology and pathophysiology and the observations of skeletal muscle pathology in patients with OI, we investigated the therapeutic potential of simultaneous anabolic targeting of both bone and skeletal muscle using a soluble activin receptor 2B（ACVR2B） in a mouse model of type Ⅲ OI（oim）. Treatment of 12-week-old oim mice with ACVR2 B for 4 weeks resulted in significant increases in both bone and muscle that were similar to those observed in healthy,wild-type littermates. This proof of concept study provides encouraging evidence for a holistic approach to treating the deleterious consequences of OI in the musculoskeletal system.

Effect of chronic sleep deprivation on peak bone mass in rats: An experimental study

Objective:To investigate the effects of chronic sleep deprivation(CSD)on bone microstructure and peak bone mass(PBM)in SD rats.Methods:Twenty-four SD rats were randomly divided into CSD group and control group.In the CSD group,a CSD model was established using a new sleep deprivation instrument for rats and mice,and intervened for 5 weeks.Bone turnover markers including P1NP and CTX-1 before and after the experiment were observed.After the experiment,the left femur were scanned by Micro-CT,and the cortical bone and bone trabecula were three-dimensionally reconstructed,respectively.The bone mineral density(BMD)and relevant parameters were detected.Results:CT images of the femur(proximal ends)showed significant trabecular loss in CSD rats.Trabecular parameters including bone volume fraction(BV/TV),trabecular number(Tb.N)and trabecular separation(Tb.Sp)in the CSD group were all lower than those in the control group.The bone cortex of the middle segment of the femur and tibia in CSD rats was also lower than that in the control group.The parameters of bone cortex including total tissue area(Tt.Ar),cortical bone area(Ct.Ar)and cortical bone thickness(Ct.Th)in the CSD group were significantly lower than those in the control group(P<0.01).After chronic CSD,BMD of both bone trabecula and bone cortex of the femur was lower,while the corresponding P1NP and CTX-1 were significantly higher than those in the control group.Conclusion:Sleep plays an important role in PBM formation.CSD accelerates bone turnover and thus significantly reducing PBM in SD rats.

Profile of Bone Mass and Its Determining Factors in Type 2 Diabetes: Case-Control Study

Background: Type 2 diabetes mellitus, beyond its well-known cardiovascular and neurological complications, is now increasingly recognized as having deleterious effects on bone tissue. It’s thus presented as an independent risk factor for bone fragility with a considerable fracture risk relating to many more or less intricate parameters. The general objective of our study is to assess bone mass during type 2 diabetes in Senegalese women. Methodology: We had carried out a cross-sectional and descriptive study. Socio-demographic characteristics were collected on the basis of a questionnaire. Then each of the subjects had undergone a complete clinical examination followed by a blood sample for a biological assessment of certain cardiovascular risk factors. Bone mass was measured using a bio-impedancemeter. Results: We recruited 88 women with type 2 diabetes and 83 healthy control women. The mean age of diabetic subjects was 52.7 years ± 6.8 (with extremes of 39 and 74 years). In control, the mean age was 51.0 ± 8.5 years (with extremes of 35 and 72 years). Among the diabetic subjects, 22 subjects or 25% practiced a regular walk against 27 (32.5%) in the control. Forty-three among the diabetic subjects (48.8%) were known hypertensive and followed. According to the body mass index, 71 patients (80.7%) were overweight compared to 59 (71.1%) controls. According to the waist size, 80 (90.9%) diabetic subjects had an elevated waist size compared to 69 control women (83.1%). Among diabetic subjects, 41 patients (46.5%) were hyperglycemic imbalance according to fasting blood glucose and 59 patients (67%) according to glycated hemoglobin level. Thirty-seven diabetics (42%), had both high fasting blood glucose and elevated glycated hemoglobin. The mean duration of diabetes was 8.68 ± 7.18 years. We found significantly higher bone mass in type 2 diabetic subjects (p = 0.03). Among diabetics, 27.3% had low bone mass compared to 36.1% of control. It’s noted that the subjects of the “low bone mass” group among the control subjects also have a significant drop in other anthropometric parameters (weight, body mass index, waist size, muscle mass). It should also be noted that the fat mass is significantly higher in diabetic subjects with normal or even high bone mass. In control subjects, bone mass was positively correlated with weight (r = 0.36;p = 0.001), muscle mass (r = 0.93;p < 0.0001) and fasting blood glucose (r = 0.26;p = 0.02);and negatively correlate with age (r = 0.22;p = 0.04). On the other hand, in type 2 diabetic subjects, bone mass is positively correlated with age (r = 0.22;p = 0.04), muscle mass (r = 0.89;p < 0.0001) and the diabetes duration (r = 0.44;p = 0.001). Conclusion: Bone mass is higher in type 2 diabetics compared to healthy controls. Chronic hyperglycemia and the diabetes duration are believed to be responsible for the increase in bone mass. In addition, an increase in muscle mass would lead to an increase in bone mass.

Bone and soft tissue tumors presenting as sciatic notch dumbbell masses: A critical differential diagnosis of sciatica

AIM To study the clinical findings and characteristic features in sciatic notch dumbbell tumors(SNDTs).METHODS We retrospectively reviewed the clinical outcomes and characteristic features of consecutive cases of SNDTs(n = 8). RESULTS Buttock masses occurred in three patients with SNDT(37.5%). Severe buttock tenderness and pain at rest were observed in seven patients with SNDTs(87.5%). Remarkably, none of the patients with SNDTs experienced back pain. Mean tumor size was 8.4 ± 2.0 cm(range, 3.9 to 10.6 cm) and part of the tumor mass was detected in 2 patients in the sagittal view of lumbar magnetic resonance imaging(MRI).CONCLUSION The clinical information regarding to SNDTs is scarce. The authors consider that above mentioned characteristic findings may facilitate the suspicion of pelvic pathology and a search for SNDT by MRI or computed tomography should be considered in patients presenting with sciatica without evidence of spinal diseases.

Research progress on the role of cold-sensitive channel TRPM8 in controlling low temperature-induced bone metabolic imbalance

With increasing aging population,osteoporosis has emerged as a public health problem worldwide.Epidemiological data reveal that the prevalence of osteoporosis in cold regions is high,and low temperatures may crucially affect bone mass.Recent studies have found that the transient receptor potential melastatin-8(TRPM8)channel,a cold-sensitive ion channel,can sense cold environment,and can be activated in cold environment.It may play an antagonistic role in low temperature-induced bone mass reduction.Mechanistically,this function may be ascribed to the activation of TRPM8 channel proteins in human bone marrow mesenchymal stem cells(hBM-MSCs),which causes osteoblast differentiation and mineralization in the bone.TRPM8 channel on the surface of brown adipocytes participates in the thermogenesis in brown adipose tissue(BAT)and the regulation of whole-body energy balance to maintain bone homeostasis.TRPM8 may be involved in bone remodeling throughout life.This paper reviews recent research on the possible antagonistic mechanism of TRPM8 in signaling pathways related to low temperature-induced bone mass loss and assesses the possibility of TRPM8 as a molecular target for the prevention and treatment of low temperature-induced osteoporosis in cold regions.

Bone mineral density in Iranian patients: Effects of age, sex, and body mass index

Introduction: Osteoporosis is a multifactorial skeletal disease that is characterized by reduced bone mineral density (BMD). BMD values depend on several factors such as age, sex and age at menopause. The purpose of this study was to determine the prevalence and changes in bone mineral density in Iranian patients. Methods: Three hundred patients were selected through random sampling technique in 2009. BMD was assessed by Norland (Excell) technique at the lumbar and femoral neck. Weight and height were measured through standard methods. A thorough history was taken from each patient. The data was analyzed using SPSS software version 13.0. P-values less than 0.05 were considered statistically significant. Results: From among the 300 studied patients, 86.6% were female. their mean age was 52.7 years. Their average body mass index (BMI) was 28.14 kg/m2. Mean T-Score at lumbar spine and femoral neck was -1.07 ±1.19 and -1.75 ± 1.33 respectively. Mean BMD value at lumbar spine and femoral neck was 0.92 ± 0.19 and 0.77 ± 0.16 respectively. The prevalence of osteoporosis at lumbar spine and femoral neck was 33.7% and 16.7, respectively. There was a significant correlation between age, BMI and BMD values (P-Value Conclusion: This study shows that ageing and low BMI are risk factors associated with bone loss. it is recommended to measure BMD and implement prevention programs for high-risk people.

不同慢性病中老年女性骨折风险及低骨量切点预测分析

背景:中老年女性是骨质疏松的高发人群,慢性病增加骨质疏松罹患风险。低骨量是骨质疏松发病前的危险阶段,目前缺少常见慢性病人群的骨折风险差异及诊断指标切点值的相关报道。目的:通过对不同慢性病中老年女性骨折风险的分析,探讨肥胖、高血压、高血脂、糖尿病、动脉硬化与骨密度的相关性,找到可预测低骨量指标的切点值,为防治骨质疏松提供参考。方法:将45-70岁203名女性受试者分为正常组和慢性病组,采用超声骨密度测量仪进行跟骨骨密度测试,采用动脉硬化仪测试肱-踝脉搏波传导速度,采用全自动生化分析仪测试血糖、血脂,采用身体成分分析仪测试体质量指数、脂肪质量及肌肉质量。结果与结论:①61-70岁女性骨密度和骨折风险系数及51-60岁、61-70岁骨强度与<50岁比较,差异有显著性意义(P<0.05);②糖尿病组骨折风险明显高于其余各组,动脉硬化组则高于正常组和肥胖组(P<0.05);③骨密度与年龄、左侧血管弹性程度、右侧血管弹性程度、三酰甘油呈负相关,与体质量指数呈正相关(P<0.05);上述指标与骨密度受试者工作特征(ROC)曲线下面积介于0.5-0.7之间,低骨量对应切点分别为55.5岁(年龄)、756.0 cm/s(左侧血管弹性)、789.0 cm/s(右侧血管弹性)、1.115 mmol/L(三酰甘油)、22.35 kg/m^(2)(体质量指数);④结论:糖尿病和动脉硬化增加中老年女性骨折风险,测定体质量指数、血管弹性和三酰甘油对女性低骨量预测具有一定早期诊断价值。

超短种植体植入结合上颌窦内提升治疗上颌后牙骨量严重不足的疗效观察

目的探讨超短种植体植入结合上颌窦内提升治疗上颌后牙骨量严重不足的近远期疗效。方法选择84例上颌后牙骨量严重不足患者,根据手术方式分为对照组(上颌窦内提升并同期种植体修复)和观察组(上颌窦内提升结合超短种植体植入)。比较两组患者牙槽骨高度(RBH)、龈乳头高度、骨质增量高度、边缘骨丧失高度,以及种植体周围骨量和留存率、牙菌斑指数(PLI)、出血指数(BI)、牙周袋探诊深度(PD)、附着丧失(CAL)和并发症发生情况。结果与术前比较,术后两组RBH均明显升高(P<0.05),但术后两组比较差异无显著性(P>0.05)。与术后1周比较,术后6个月两组种植体周围骨量均降低,而观察组高于对照组(P<0.05)。术后6个月观察组龈乳头高度低于对照组(P<0.05)。两组术后骨质增量高度、边缘骨丧失高度和种植体留存率以及并发症发生率比较差异无显著性(P>0.05)。与术后1周比较,术后6个月两组PLI、BI、PD、CAL升高,观察组低于对照组(P<0.05)。结论超短种植体植入结合上颌窦内提升治疗上颌后牙骨量严重不足疗效好,值得临床推广。

督灸对肾阳亏虚型绝经后低骨量患者腰背疼痛的疗效

目的探究督灸对肾阳亏虚型绝经后低骨量患者腰背疼痛的作用效果。方法将2022年1月到2023年6月在医院接受系统治疗的86例肾阳亏虚型绝经后低骨量患者按照随机数字表法进行分组,对照组接受常规治疗,观察组在常规治疗的基础上接受督灸干预,比较两组在腰椎正位骨密度、视觉模拟评分(VAS)、血清骨钙素(OCN)及血清Ca^(2+)、临床疗效和不良反应方面的差异。结果治疗后观察组腰椎骨密度大于对照组,VAS评分低于对照组(P<0.05);治疗后观察组血清Ca^(2+)比对照组高,血清OCN比对照组低(P<0.05);观察组治疗有效率高于对照组(P<0.05)。两组不良反应的发生率差异无统计学意义(P>0.05)。结论督灸能改善肾阳亏虚型绝经后低骨量患者的腰背疼痛情况,提升患者生活质量,有较好的临床疗效,值得进一步推广使用。

探讨定量CT及生物电阻抗测定内脏脂肪面积和骨密度的关系

目的:探讨采用定量CT(Quantitative computer tomography,QCT)及生物电阻抗(Bioelectrical impedance analysis,BIA)测定内脏脂肪面积(Visceral fat area,VFA)与骨密度(Bone density,BMD)的关系。方法:回顾性选取郑州大学第一附属医院健康管理中心1131例体检者行QCT和BIA测定的VFA及BMD,采用Pearson相关系数、多因素线性回归、单因素和多因素Logistic回归分析二者的相关性;并采用Bland-Altman评估两者测定VFA的一致性。结果:Pearson相关分析显示QCT和BIA测定的VFA与BMD呈负相关(r=-0.197和r=-0.288)。多因素Logistic回归分析显示VFA(BIA)是骨量下降的危险因素(OR=1.010,95%CI:1.005~1.015);VFA(QCT)是骨量下降的危险因素(OR=1.003,95%CI:1.001~1.005);Bland-Altman分析显示,QCT和BIA测量VFA具有较高的一致性。结论:VFA是骨量下降的危险因素,测定VFA的QCT和BIA两者具有较高的一致性,可以采用BIA测定的VFA评估骨量下降。

数字化技术在口腔种植骨增量中的应用及研究进展

种植区牙槽骨骨量不足是影响口腔种植效果的重要因素,骨增量是解决这一问题的有效途径。数字化技术的应用为口腔种植骨增量提供了新手段。本文就数字化技术在口腔种植骨增量中的应用和研究进展进行简要阐述。

基于超高效液相色谱-质谱联用技术的慢性肾脏病骨代谢异常大鼠血清代谢组学研究

目的 通过超高效液相色谱-质谱(UHPLC-MS)联用技术探索慢性肾脏病骨代谢异常(CKD-BD)大鼠血清代谢组学变化。方法 该研究于2021年1月至2022年4月进行,选择16只8周龄SPF级SD雄性大鼠经过1周适应性喂养后,采用随机数字表法分为两组,每组8只。健康对照(NC)组:使用普通大鼠饲料喂养90 d;CKD-BD组:采用高磷高腺嘌呤饲料喂养60 d之后更换高磷饲料喂养30 d后处死,并通过生化检测及骨形态计量学方法对模型进行验证。造模成功后通过UHPLC-MS比较CKD-BD组大鼠与NC组大鼠血清代谢产物变化,通过多元统计分析等方法鉴定两组间差异代谢物,并通过生物信息学方法对差异代谢产物进行功能注释。结果 与NC组大鼠相比,CKD-BD组大鼠血肌酐、血磷显著升高,血钙显著降低(P<0.01)。骨形态计量学检测NC组大鼠骨矿化沉积率(MAR)为(1.90±0.61)μm/d,CKD-BD组大鼠MAR为(2.80±0.73)μm/d,差异有统计学意义(P<0.05)。NC组大鼠骨形成率/骨体积(BFR/BV)为(0.41±0.20)%/d,CKD-BD组大鼠BFR/BV为(1.25±0.41)%/d,差异有统计学意义(P<0.05)。代谢组学检测结果提示,与NC组相比,CKD-BD组糖基磷脂酰肌醇锚定蛋白合成等通路上调。自噬、胆汁酸合成分泌、胆固醇代谢、牛磺酸和次级牛磺酸代谢、甘油磷脂代谢等通路下调(P<0.05)。结论 通过UHPLC-MS技术比较CKD-BD大鼠与正常大鼠血清代谢产物,发现CKD疾病状态下血清代谢产物发生变化,CKD-BD组糖基磷脂酰肌醇锚定蛋白合成通路上调,与自噬相关的代谢通路下调,这些可能参与了CKD-BD发生。

拔牙位点保存技术对前牙口腔种植患者牙槽骨骨量及牙槽美学效果的影响

目的观察拔牙位点保存技术对前牙口腔种植患者牙槽骨骨量及牙槽美学效果的影响。方法选取2018年1月—2022年12月在本院口腔科接受前牙口腔种植手术的72例患者,并依照随机分配原则将其分为对照组和观察组,每组36例。对照组采取常规拔牙和口腔种植手术,观察组采取拔牙位点保存技术。对两组的牙槽美学效果、牙槽骨量指标进行比较。结果术前,两组牙槽美学效果得分对比,差异无统计学意义(P>0.05);术后,两组的牙槽美学效果得分较术前均更高,且观察组术后牙槽美学效果得分较对照组更高,组间差异有统计学意义(P<0.05)。术前,两组牙槽骨高度、密度、宽度值对比,差异无统计学意义(P>0.05);术后,两组牙槽骨高度、密度、宽度值均较术前更高,且观察组术后牙槽骨高度、密度、宽度值显著高于对照组,组间差异有统计学意义(P<0.05)。结论拔牙位点保存技术对前牙口腔种植患者具有较高的应用价值,可显著提升牙槽美学效果,有效保存牙槽骨高度、密度、宽度值,促进疾病康复,值得临床推广。

运动对骨量减少老年人影响效果的Meta分析

目的:通过评价分析运动干预对骨量减少老年人的影响效果,为骨量减少老年人的运动实践干预提供证据支持,并探讨最佳运动干预方案。方法:通过检索PubMed、Web of Science、Cochrane Library、Em⁃base、中国知网、万方等6个数据库,收集相关研究的国内外文献,并通过使用RevMan5.4.1软件进行Meta分析。结果:共纳入14篇文献,Meta分析结果显示:运动对骨密度T值[MD=0.25,95%CI(0.13,0.37),P<0.0001]、骨密度[SMD=0.30,95%CI(0.05,0.54),P=0.02]、生活质量[MD=-6.33,95%CI(-8.43,-4.24),P<0.00001](QUALEFFO评分)[MD=2.18,95%CI(0.92,3.43),P=0.0007](SF-36量表)等的影响具有显著差异。结论:运动干预可以改善骨量减少老年人的身体功能、预防骨量减少、延缓骨质流失;预达到有效运动干预。建议骨量减少老年人可以进行运动周期为24周(或>12周)、运动频率≥3次/周、时间60min或者30-60min的有氧运动、阻力运动或敏捷运动。

龟板提取物抑制细胞衰老缓解SOP小鼠骨量丢失及海马退变

目的探讨龟板提取物(Plastrum testudinis extract,后简称PTE)通过抑制细胞衰老缓解SOP小鼠的骨量丢失及海马退变的作用。方法动物实验:应用传统半乳糖皮下注射+去势法建立老年性骨质疏松症(senile osteoporosis,SOP)模型,将C57/BL6小鼠分为雌性或雄性的CON组、SOP组、SOP+PTE组;SOP+PTE组在造模过程中用PTE 0.5 g/mL灌胃干预4周,取材前1周进行行为学实验,后取大脑、L4椎体,检测骨和海马组织形态学;细胞实验:利用过氧叔丁醇(TBHP)诱导MC3T3/HT22细胞衰老,分别观察诱导后HT22半乳糖苷酶染色、衰老标志物和MC3T3成骨、衰老标志物的变化及PTE相应的治疗效果。结果MicroCT提示雌雄小鼠中,与CON组相比,SOP组骨量丢失,SOP+PTE组骨量则得到了恢复;骨HE切片结果与MicroCT结果相符;海马组织切片提示,与CON组相比,SOP组海马出现退变,而SOP+PTE组退变则得到缓解。在新物体识别实验和时序实验中,与CON、SOP组相比,雄性SOP+PTE组记忆能力明显恢复;但雌雄小鼠旷场实验均无明显变化。②TBHP可诱导MC3T3衰老,降低成骨能力及增加衰老蛋白表达,而当加入PTE后,均能逆转TBHP导致的成骨能力降低与蛋白下降;TBHP亦可增加HT22半乳糖苷酶染色区域,增加衰老蛋白表达,而加入PTE后,上述变化均得到逆转。结论PTE通过抑制前成骨细胞与海马神经元细胞的衰老,缓解SOP小鼠的骨量丢失和海马衰老退变。