Bone marrow mesenchymal stem cell transplantation is an effective treatment for neonatal hy- poxic-ischemic brain damage. However, the in vivo transplantation effects are poor and their survival, colonization and diff...Bone marrow mesenchymal stem cell transplantation is an effective treatment for neonatal hy- poxic-ischemic brain damage. However, the in vivo transplantation effects are poor and their survival, colonization and differentiation efficiencies are relatively low. Red or near-infrared light from 600-1,000 nm promotes cellular migration and prevents apoptosis. Thus, we hypothesized that the combination of red light with bone marrow mesenchymal stem cell transplantation would be effective for the treatment of hypoxic-ischemic brain damage. In this study, the migra- tion and colonization of cultured bone marrow mesenchymal stem cells on primary neurons after oxygen-glucose deprivation were detected using Transwell assay. The results showed that, after a 40-hour irradiation under red light-emitting diodes at 660 nm and 60 mW/cmz, an increasing number of green fluorescence-labeled bone marrow mesenchymal stem cells migrated towards hypoxic-ischemic damaged primary neurons. Meanwhile, neonatal rats with hypoxic-ischemic brain damage were given an intraperitoneal injection of 1 x 106 bone marrow mesenchymal stem cells, followed by irradiation under red light-emitting diodes at 660 nm and 60 mW/cm2 for 7 successive days. Shuttle box test results showed that, after phototherapy and bone marrow mesenchymal stem cell transplantation, the active avoidance response rate of hypoxic-ischemic brain damage rats was significantly increased, which was higher than that after bone marrow mesenchymal stem cell transplantation alone. Experimental findings indicate that 660 nm red light emitting diode irradiation promotes cells, thereby enhancing the contribution ic-ischemic brain damage. the migration of bone marrow mesenchymal stem of cell transplantation in the treatment of hypox-展开更多
Background/Purpose: Multipotent bone marrow-derived mesenchymal stromal cells (BMMSC) have been shown to possess the potential for tissue regeneration. The application of mesenchymal stromal cells (MSC)-derived growth...Background/Purpose: Multipotent bone marrow-derived mesenchymal stromal cells (BMMSC) have been shown to possess the potential for tissue regeneration. The application of mesenchymal stromal cells (MSC)-derived growth factors and cytokines (GF/CKs) has been implicated for the repair and regeneration of the damaged skin that occurs due to aging and exposure to environmental stress factors. Methods: We have used both qualitative and quantitative measurements of the GF/CKs from the conditioned medium (CM) of a pooled population of BMMSC by antibody array analysis as well as by enzyme-linked immunosorbent assay (ELISA). Furthermore, the CM was also used in a variety of in vitro biological assays to measure its protective properties in human skin fibroblasts. Results: We have characterized the secretome of BMMSC by analyzing the composition of the CM using a forty-one growth factor array system. Thirteen of these GF/CK/extra cellular matrix (ECM)/ matrix metalloproteinases (MMP)-inhibitors in the CM were quantified owing to their involvement in skin repair cascade. In addition, we report that the BMMSC-CM was also able to protect dermal fibroblasts against tert-Butyl hydro peroxide (tbOH) induced oxidative stress and ultra violet B (UV-B) radiation induced cell damage. Conclusion: Based on the data presented here, we propose that BMMSC-derived CM may have the potential to promote health and rejuvenation of the aging skin.展开更多
Propoxur is a widely used dithiocarbamate insecticide. In this study, the clastogenic effect of propoxur has been evaluated using chromosomal aberration assay in mouse bone marrow cells. Single i. p. administration of...Propoxur is a widely used dithiocarbamate insecticide. In this study, the clastogenic effect of propoxur has been evaluated using chromosomal aberration assay in mouse bone marrow cells. Single i. p. administration of propoxur, at 25 mg/kg b.wt., a maximum tolerated dose (MTD) and 12 .5mg/kg b.wt (50% of MTD) have significantly induced different types of aberrations after 24 h of treatment. The aberrations were dose and time dependent and reached a maximum after 24 h of exposure. The sresult suggest a genotoxic potential of propoxur.展开更多
Purpose: Bone marrow and muscle adiposity have been considered to correlate with osteoporosis and Sarcopenia. Proton Density Fat Fraction (PDFF) can be measured by Magnetic Resonance Imaging (MRI). The purpose of the ...Purpose: Bone marrow and muscle adiposity have been considered to correlate with osteoporosis and Sarcopenia. Proton Density Fat Fraction (PDFF) can be measured by Magnetic Resonance Imaging (MRI). The purpose of the present study was to measure PDFF in the lumbar spine, paraspinal muscle and subcutaneous fat tissue. Methods: Participants were comprised of 30 patients (18 males, 12 females;age range, 14 - 87 years) who underwent MRI due to low back symptoms. PDFFs for the body of the fourth lumbar vertebra (L4), paraspinal muscle, and subcutaneous fat were measured. Results: PDFFs of the vertebral body and subcutaneous fat were significantly higher than that of paraspinal muscle (p < 0.001). PDFF was significantly higher for subcutaneous fat than for the vertebral body (p < 0.001). Although no significant differences in PDFF of the vertebral body, paraspinal muscle, and subcutaneous fat between females and males, PDFFs of the vertebral body and paraspinal muscle were significantly higher in older subjects (>63 years) than in younger subjects (Conclusions: PDFF of the vertebral body was significantly higher than that of paraspinal muscle. PDFFs of the vertebral body and paraspinal muscle were significantly lower in younger subjects than in older subjects.展开更多
The two-tailed comet assay(2T-comet assay) is a method for simultaneously evaluating DNA single-strand breaks(SSBs) and double-strand breaks(DSBs). In the present study, the endonuclease DNase I and hydrogen peroxide ...The two-tailed comet assay(2T-comet assay) is a method for simultaneously evaluating DNA single-strand breaks(SSBs) and double-strand breaks(DSBs). In the present study, the endonuclease DNase I and hydrogen peroxide were used to induce DSBs and SSBs in bone marrow mononuclear cells(BMMNCs) from mice, and the damaged DNAs were assessed with a 2T-comet assay. The results demonstrated that this method can detect and discriminate between BMMNC DNA SSBs and DSBs simultaneously. Using this method, we studied DNA damage in BMMNCs from female BALB/c mice after total body irradiation with X-rays and carbon ions. The results indicated that these two types of radiation induced serious DNA damage in BMMNCs in a dose-dependent manner.The DNA damage induced by carbon ions was more severe than that induced by X-rays at the same dose, and a high dose of carbon ion radiation was more likely to cause death in mice. The DSBs and SSBs induced by X-rays were the highest on the 3rd day post-IR. For carbon ion radiation,DSBs were the most serious on the 3rd day, while SSBs were more obvious on the 3rd day and 13th day post-IR.The ratio of DSBs/SSBs was clearly related to the different types of radiation.展开更多
目的:基于MRI定量非对称回波最小二乘估算水脂分离(iterative decomposition of water and fat with echo asymmetry and least-squares estimation image quantitation,IDEAL-IQ)技术探讨成年人腰椎不同节段骨髓脂肪与年龄和性别的关...目的:基于MRI定量非对称回波最小二乘估算水脂分离(iterative decomposition of water and fat with echo asymmetry and least-squares estimation image quantitation,IDEAL-IQ)技术探讨成年人腰椎不同节段骨髓脂肪与年龄和性别的关系。方法:收集298例受检者的MRI IDEAL-IQ脂肪分数图像,其中男性138例,女性160例,年龄20~69岁。将所有患者按照每10岁为一个年龄段分为5组:20~29岁(20~组),男24例,女20例;30~39岁(30~组),男47例,女39例;40~49岁(40~组),男36例,女47例;50~59岁(50~组),男20例,女37例;60~69岁(60~组),男11例,女17例。使用脂肪分数图在GE ADW4.6工作站测量L1~L5的骨髓质子密度脂肪分数(proton density fat fraction,PDFF)。结果:同一年龄组、不同性别间PDFF存在差异,20~、30~、40~组人群中,男性L1~L5椎体PDFF均高于女性(P<0.05);50~组人群中男性L1~L5椎体PDFF与女性的差异无统计学意义(P>0.05);60~组人群,男性L1~L5椎体PDFF均低于女性(P<0.05)。腰椎椎体PDFF与年龄呈正相关,女性(r=0.72,P<0.05)相关性高于男性(r=0.32,P<0.05)。从20~69岁,男性L4 PDFF增长率最大(21.08%),女性L1 PDFF增长率最大(65.68%);男性各椎体PDFF增长主要集中在30~及50~组,其中L1、L4、L5椎体PDFF在50~组增长率最大,L2、L3椎体PDFF在30~岁组增长率最大;女性各椎体PDFF在30~组呈轻微下降趋势,此后各椎体PDFF逐渐升高,增长主要集中在40~、50~、60~三个年龄组,其中50~组增长率最大。结论:成人不同年龄组男女性各椎体脂肪分布存在差异,椎体PDFF增长率也有所不同;腰椎不同节段椎体PDFF均与年龄呈正相关。展开更多
目的:观察损伤控制骨科(damage control orthopaedic,DCO)策略对下肢长骨干骨折伴发脂肪栓塞综合征(fat embolism syndrome,FES)的干预效果。方法:回顾性分析2015年1月至2021年5月收治的163例下肢长骨干骨折伴发FES患者临床资料,以2018...目的:观察损伤控制骨科(damage control orthopaedic,DCO)策略对下肢长骨干骨折伴发脂肪栓塞综合征(fat embolism syndrome,FES)的干预效果。方法:回顾性分析2015年1月至2021年5月收治的163例下肢长骨干骨折伴发FES患者临床资料,以2018年1月实施DCO策略为时间点分为两组,2015年1月至2017年12月收治92例为对照组,2018年1月至2021年5月收治71例为干预组。观察并比较两组患者院内死亡率、动脉血氧饱和度(arterial oxygen saturation,SaO2)、动脉血氧分压(arterial partial pressure of oxygen,PaO2)和氧合指数(oxygenation index,OI)、血红蛋白(hemoglobin,Hb)、血小板计数(platelet count,PLT)、髋关节Harris评分、美国特种外科医院膝关节评分(Hospital for Special Surgery Knee Score,HSS)评分、美国骨科足与踝关节协会(American Orthopaedic Foot and Ankle Society,AOFAS)评分、临床疗效及并发症。结果:163例患者获随访,时间12~18(16.91±1.22)个月。干预组院内死亡率为2.82%(2/71),对照组院内死亡率为16.30%(15/92),两组差异有统计意义(χ^(2)=6.455,P<0.05);两组干预后SaO2、PaO2和OI均较干预前升高(P<0.05),且两组干预后SaO2、PaO2和OI比较差异有统计意义(P<0.05)。两组干预后Hb、PLT均较干预前升高(P<0.001),且两组干预后Hb、PLT比较差异有统计意义(P<0.05)。两组患者治疗3个月后髋关节Harris评分、膝关节HSS评分、踝关节AOFAS评分均优于治疗前(P<0.05)。干预组临床总有效率高于对照组(χ^(2)=4.194,P<0.05)。干预组并发症总发生低于对照组(χ^(2)=4.747,P<0.05)。结论:DCO策略有助于降低下肢长骨干骨折伴发FES患者院内死亡率,有利于消除FES症状和平稳生命体征,可为Ⅱ期确定性手术争取时间优势,临床干预效果显著,值得推广应用。展开更多
目的探讨腰肌指数(psoas muscle index,PMI)、腰椎椎体骨髓脂肪分数(fat fraction,FF)与骨密度(bone mineral density,BMD)间的关系及对骨质疏松(osteoporosis,OP)的诊断效能。方法选取四川省骨科医院2018年3月至2021年5月BMD筛查的200...目的探讨腰肌指数(psoas muscle index,PMI)、腰椎椎体骨髓脂肪分数(fat fraction,FF)与骨密度(bone mineral density,BMD)间的关系及对骨质疏松(osteoporosis,OP)的诊断效能。方法选取四川省骨科医院2018年3月至2021年5月BMD筛查的200例检查者作为研究对象,根据BMD分为骨量正常组(T值≥-1.0,n=105)、骨量减少组(-2.5<T值<-1.0,n=57)、OP组(T值≤-2.5,n=38)。对比三组一般资料及BMD、PMI、腰椎椎体骨髓FF,分析PMI、腰椎椎体骨髓FF与BMD间关系,建立OP的Logistic回归模型,评估PMI、腰椎椎体骨髓FF对OP的诊断效能。结果OP组BMD、PMI低于骨量减少组、骨量正常组,FF高于骨量减少组、骨量正常组(P<0.05);骨量减少组的BMD、PMI低于骨量正常组,FF高于骨量正常组(P<0.05);PMI与BMD呈正相关,腰椎椎体骨髓FF与BMD呈负相关(P<0.05);年龄、身体质量指数(body mass index,BMI)、PMI、腰椎椎体骨髓FF是骨量减少的影响因素,年龄、PMI、腰椎椎体骨髓FF是OP的影响因素(P<0.05);腰椎椎体骨髓FF联合诊断OP的受试者工作特征(receiver operating characteristic,ROC)曲线下的面积(area under curve,AUC)为0.853,大于单一指标诊断值(P<0.05)。结论PMI、腰椎椎体骨髓FF是BMD的独立影响因素,二者联合在OP诊断中具有较高效能。展开更多
基金the National Natural Science Foundation of China,No.30970758,31271060the National Science and Technology Support Program of China,No.2011BAI14B04,2012BAI16B02the Natural Science Foundation of Chongqing in China,No.cst-c2012jjA10103
文摘Bone marrow mesenchymal stem cell transplantation is an effective treatment for neonatal hy- poxic-ischemic brain damage. However, the in vivo transplantation effects are poor and their survival, colonization and differentiation efficiencies are relatively low. Red or near-infrared light from 600-1,000 nm promotes cellular migration and prevents apoptosis. Thus, we hypothesized that the combination of red light with bone marrow mesenchymal stem cell transplantation would be effective for the treatment of hypoxic-ischemic brain damage. In this study, the migra- tion and colonization of cultured bone marrow mesenchymal stem cells on primary neurons after oxygen-glucose deprivation were detected using Transwell assay. The results showed that, after a 40-hour irradiation under red light-emitting diodes at 660 nm and 60 mW/cmz, an increasing number of green fluorescence-labeled bone marrow mesenchymal stem cells migrated towards hypoxic-ischemic damaged primary neurons. Meanwhile, neonatal rats with hypoxic-ischemic brain damage were given an intraperitoneal injection of 1 x 106 bone marrow mesenchymal stem cells, followed by irradiation under red light-emitting diodes at 660 nm and 60 mW/cm2 for 7 successive days. Shuttle box test results showed that, after phototherapy and bone marrow mesenchymal stem cell transplantation, the active avoidance response rate of hypoxic-ischemic brain damage rats was significantly increased, which was higher than that after bone marrow mesenchymal stem cell transplantation alone. Experimental findings indicate that 660 nm red light emitting diode irradiation promotes cells, thereby enhancing the contribution ic-ischemic brain damage. the migration of bone marrow mesenchymal stem of cell transplantation in the treatment of hypox-
文摘Background/Purpose: Multipotent bone marrow-derived mesenchymal stromal cells (BMMSC) have been shown to possess the potential for tissue regeneration. The application of mesenchymal stromal cells (MSC)-derived growth factors and cytokines (GF/CKs) has been implicated for the repair and regeneration of the damaged skin that occurs due to aging and exposure to environmental stress factors. Methods: We have used both qualitative and quantitative measurements of the GF/CKs from the conditioned medium (CM) of a pooled population of BMMSC by antibody array analysis as well as by enzyme-linked immunosorbent assay (ELISA). Furthermore, the CM was also used in a variety of in vitro biological assays to measure its protective properties in human skin fibroblasts. Results: We have characterized the secretome of BMMSC by analyzing the composition of the CM using a forty-one growth factor array system. Thirteen of these GF/CK/extra cellular matrix (ECM)/ matrix metalloproteinases (MMP)-inhibitors in the CM were quantified owing to their involvement in skin repair cascade. In addition, we report that the BMMSC-CM was also able to protect dermal fibroblasts against tert-Butyl hydro peroxide (tbOH) induced oxidative stress and ultra violet B (UV-B) radiation induced cell damage. Conclusion: Based on the data presented here, we propose that BMMSC-derived CM may have the potential to promote health and rejuvenation of the aging skin.
文摘Propoxur is a widely used dithiocarbamate insecticide. In this study, the clastogenic effect of propoxur has been evaluated using chromosomal aberration assay in mouse bone marrow cells. Single i. p. administration of propoxur, at 25 mg/kg b.wt., a maximum tolerated dose (MTD) and 12 .5mg/kg b.wt (50% of MTD) have significantly induced different types of aberrations after 24 h of treatment. The aberrations were dose and time dependent and reached a maximum after 24 h of exposure. The sresult suggest a genotoxic potential of propoxur.
文摘Purpose: Bone marrow and muscle adiposity have been considered to correlate with osteoporosis and Sarcopenia. Proton Density Fat Fraction (PDFF) can be measured by Magnetic Resonance Imaging (MRI). The purpose of the present study was to measure PDFF in the lumbar spine, paraspinal muscle and subcutaneous fat tissue. Methods: Participants were comprised of 30 patients (18 males, 12 females;age range, 14 - 87 years) who underwent MRI due to low back symptoms. PDFFs for the body of the fourth lumbar vertebra (L4), paraspinal muscle, and subcutaneous fat were measured. Results: PDFFs of the vertebral body and subcutaneous fat were significantly higher than that of paraspinal muscle (p < 0.001). PDFF was significantly higher for subcutaneous fat than for the vertebral body (p < 0.001). Although no significant differences in PDFF of the vertebral body, paraspinal muscle, and subcutaneous fat between females and males, PDFFs of the vertebral body and paraspinal muscle were significantly higher in older subjects (>63 years) than in younger subjects (Conclusions: PDFF of the vertebral body was significantly higher than that of paraspinal muscle. PDFFs of the vertebral body and paraspinal muscle were significantly lower in younger subjects than in older subjects.
基金supported by the National Natural Science Foundation of China(No.11575259)
文摘The two-tailed comet assay(2T-comet assay) is a method for simultaneously evaluating DNA single-strand breaks(SSBs) and double-strand breaks(DSBs). In the present study, the endonuclease DNase I and hydrogen peroxide were used to induce DSBs and SSBs in bone marrow mononuclear cells(BMMNCs) from mice, and the damaged DNAs were assessed with a 2T-comet assay. The results demonstrated that this method can detect and discriminate between BMMNC DNA SSBs and DSBs simultaneously. Using this method, we studied DNA damage in BMMNCs from female BALB/c mice after total body irradiation with X-rays and carbon ions. The results indicated that these two types of radiation induced serious DNA damage in BMMNCs in a dose-dependent manner.The DNA damage induced by carbon ions was more severe than that induced by X-rays at the same dose, and a high dose of carbon ion radiation was more likely to cause death in mice. The DSBs and SSBs induced by X-rays were the highest on the 3rd day post-IR. For carbon ion radiation,DSBs were the most serious on the 3rd day, while SSBs were more obvious on the 3rd day and 13th day post-IR.The ratio of DSBs/SSBs was clearly related to the different types of radiation.
文摘目的:基于MRI定量非对称回波最小二乘估算水脂分离(iterative decomposition of water and fat with echo asymmetry and least-squares estimation image quantitation,IDEAL-IQ)技术探讨成年人腰椎不同节段骨髓脂肪与年龄和性别的关系。方法:收集298例受检者的MRI IDEAL-IQ脂肪分数图像,其中男性138例,女性160例,年龄20~69岁。将所有患者按照每10岁为一个年龄段分为5组:20~29岁(20~组),男24例,女20例;30~39岁(30~组),男47例,女39例;40~49岁(40~组),男36例,女47例;50~59岁(50~组),男20例,女37例;60~69岁(60~组),男11例,女17例。使用脂肪分数图在GE ADW4.6工作站测量L1~L5的骨髓质子密度脂肪分数(proton density fat fraction,PDFF)。结果:同一年龄组、不同性别间PDFF存在差异,20~、30~、40~组人群中,男性L1~L5椎体PDFF均高于女性(P<0.05);50~组人群中男性L1~L5椎体PDFF与女性的差异无统计学意义(P>0.05);60~组人群,男性L1~L5椎体PDFF均低于女性(P<0.05)。腰椎椎体PDFF与年龄呈正相关,女性(r=0.72,P<0.05)相关性高于男性(r=0.32,P<0.05)。从20~69岁,男性L4 PDFF增长率最大(21.08%),女性L1 PDFF增长率最大(65.68%);男性各椎体PDFF增长主要集中在30~及50~组,其中L1、L4、L5椎体PDFF在50~组增长率最大,L2、L3椎体PDFF在30~岁组增长率最大;女性各椎体PDFF在30~组呈轻微下降趋势,此后各椎体PDFF逐渐升高,增长主要集中在40~、50~、60~三个年龄组,其中50~组增长率最大。结论:成人不同年龄组男女性各椎体脂肪分布存在差异,椎体PDFF增长率也有所不同;腰椎不同节段椎体PDFF均与年龄呈正相关。
文摘目的:观察损伤控制骨科(damage control orthopaedic,DCO)策略对下肢长骨干骨折伴发脂肪栓塞综合征(fat embolism syndrome,FES)的干预效果。方法:回顾性分析2015年1月至2021年5月收治的163例下肢长骨干骨折伴发FES患者临床资料,以2018年1月实施DCO策略为时间点分为两组,2015年1月至2017年12月收治92例为对照组,2018年1月至2021年5月收治71例为干预组。观察并比较两组患者院内死亡率、动脉血氧饱和度(arterial oxygen saturation,SaO2)、动脉血氧分压(arterial partial pressure of oxygen,PaO2)和氧合指数(oxygenation index,OI)、血红蛋白(hemoglobin,Hb)、血小板计数(platelet count,PLT)、髋关节Harris评分、美国特种外科医院膝关节评分(Hospital for Special Surgery Knee Score,HSS)评分、美国骨科足与踝关节协会(American Orthopaedic Foot and Ankle Society,AOFAS)评分、临床疗效及并发症。结果:163例患者获随访,时间12~18(16.91±1.22)个月。干预组院内死亡率为2.82%(2/71),对照组院内死亡率为16.30%(15/92),两组差异有统计意义(χ^(2)=6.455,P<0.05);两组干预后SaO2、PaO2和OI均较干预前升高(P<0.05),且两组干预后SaO2、PaO2和OI比较差异有统计意义(P<0.05)。两组干预后Hb、PLT均较干预前升高(P<0.001),且两组干预后Hb、PLT比较差异有统计意义(P<0.05)。两组患者治疗3个月后髋关节Harris评分、膝关节HSS评分、踝关节AOFAS评分均优于治疗前(P<0.05)。干预组临床总有效率高于对照组(χ^(2)=4.194,P<0.05)。干预组并发症总发生低于对照组(χ^(2)=4.747,P<0.05)。结论:DCO策略有助于降低下肢长骨干骨折伴发FES患者院内死亡率,有利于消除FES症状和平稳生命体征,可为Ⅱ期确定性手术争取时间优势,临床干预效果显著,值得推广应用。
文摘目的探讨腰肌指数(psoas muscle index,PMI)、腰椎椎体骨髓脂肪分数(fat fraction,FF)与骨密度(bone mineral density,BMD)间的关系及对骨质疏松(osteoporosis,OP)的诊断效能。方法选取四川省骨科医院2018年3月至2021年5月BMD筛查的200例检查者作为研究对象,根据BMD分为骨量正常组(T值≥-1.0,n=105)、骨量减少组(-2.5<T值<-1.0,n=57)、OP组(T值≤-2.5,n=38)。对比三组一般资料及BMD、PMI、腰椎椎体骨髓FF,分析PMI、腰椎椎体骨髓FF与BMD间关系,建立OP的Logistic回归模型,评估PMI、腰椎椎体骨髓FF对OP的诊断效能。结果OP组BMD、PMI低于骨量减少组、骨量正常组,FF高于骨量减少组、骨量正常组(P<0.05);骨量减少组的BMD、PMI低于骨量正常组,FF高于骨量正常组(P<0.05);PMI与BMD呈正相关,腰椎椎体骨髓FF与BMD呈负相关(P<0.05);年龄、身体质量指数(body mass index,BMI)、PMI、腰椎椎体骨髓FF是骨量减少的影响因素,年龄、PMI、腰椎椎体骨髓FF是OP的影响因素(P<0.05);腰椎椎体骨髓FF联合诊断OP的受试者工作特征(receiver operating characteristic,ROC)曲线下的面积(area under curve,AUC)为0.853,大于单一指标诊断值(P<0.05)。结论PMI、腰椎椎体骨髓FF是BMD的独立影响因素,二者联合在OP诊断中具有较高效能。
