Postmenopausal osteoporosis is a common bone metabolic disorder characterized by deterioration of the bone microarchitecture,leading to an increased risk of fractures.Recently,circular RNAs(circ RNAs)have been demonst...Postmenopausal osteoporosis is a common bone metabolic disorder characterized by deterioration of the bone microarchitecture,leading to an increased risk of fractures.Recently,circular RNAs(circ RNAs)have been demonstrated to play pivotal roles in regulating bone metabolism.However,the underlying functions of circ RNAs in bone metabolism in postmenopausal osteoporosis remain obscure.Here,we report that circ Stag1 is a critical osteoporosis-related circ RNA that shows significantly downregulated expression in osteoporotic bone marrow mesenchymal stem cells(BMSCs)and clinical bone tissue samples from patients with osteoporosis.Overexpression of circ Stag1 significantly promoted the osteogenic capability of BMSCs.Mechanistically,we found that circ Stag1 interacts with human antigen R(Hu R),an RNA-binding protein,and promotes the translocation of Hu R into the cytoplasm.A high cytoplasmic level of Hu R led to the activation of the Wnt signaling pathway by stabilizing and enhancing low-density lipoprotein receptor-related protein 5/6(Lrp5/6)andβ-catenin expression,thereby stimulating the osteogenic differentiation of BMSCs.Furthermore,overexpression of circ Stag1 in vivo by circ Stag1-loaded adeno-associated virus(circ Stag1-AAV)promoted new bone formation,thereby preventing bone loss in ovariectomized rats.Collectively,we show that circ Stag1 plays a pivotal role in promoting the regeneration of bone tissue via Hu R/Wnt signaling,which may provide new strategies to prevent bone metabolic disorders such as postmenopausal osteoporosis.展开更多
原发性骨质疏松症(primary osteoporosis,POP)是一种以骨代谢改变、骨量降低、骨折风险增加为主要表现的常见慢性骨骼疾病。随着人口老龄化进程加快,亟须更为简便廉验的综合干预方案防治POP。中医药治疗POP具有独特优势,其中补肾填精、...原发性骨质疏松症(primary osteoporosis,POP)是一种以骨代谢改变、骨量降低、骨折风险增加为主要表现的常见慢性骨骼疾病。随着人口老龄化进程加快,亟须更为简便廉验的综合干预方案防治POP。中医药治疗POP具有独特优势,其中补肾填精、益气健脾、活血祛瘀类中药的配伍是POP中医临证常用思路。本文基于中国知网、万方、Web of Science等数据库总结归纳补肾健脾活血类方药治疗POP的临床和基础研究证据。提示补肾健脾活血类方药在提高患者骨密度(bone mineral density,BMD)、缓解疼痛、改善骨代谢标志物如血清碱性磷酸酶(alkaline phosphatase,ALP)、血清钙、白细胞介素(interleukin,IL)-6等方面收效显著。补肾健脾活血方药的作用机制是通过骨保护素(osteoprotegerin,OPG)/核因子(nuclear factor,NF)κB受体激活因子/核因子κB受体激活因子配体(receptor activator for NF-κB ligand,RANKL)、Wnt/β-连环蛋白(Wnt/β-catenin)、丝裂原活化蛋白激酶(mitogen-activated protein kinase,MAPK)与骨形成蛋白(bone morphogenic protein,BMP)-Smad等信号通路影响骨稳态进而治疗POP。补肾健脾活血类方药防治POP的临床疗效已经被证实,未来需要深化补肾健脾活血类方药“有效成分-单药-复方-作用机制-疾病靶点”的有机串联,深入挖掘其防治POP的科学内涵。展开更多
Dear Editor,This letter presents a biocompatible cross-shaped magnetic soft robot and investigates its deformation mode control strategy through COMSOL modeling and simulation.Magnetic soft robots offer novel avenues ...Dear Editor,This letter presents a biocompatible cross-shaped magnetic soft robot and investigates its deformation mode control strategy through COMSOL modeling and simulation.Magnetic soft robots offer novel avenues for precise treatment within intricate regions of the human body.展开更多
[Objectives]To investigate the protective effect and mechanism of Ershiwuwei Songshi Pill on acute alcoholic liver injury in rats.[Methods]Sixty male SD rats were randomly divided into normal control group,model group...[Objectives]To investigate the protective effect and mechanism of Ershiwuwei Songshi Pill on acute alcoholic liver injury in rats.[Methods]Sixty male SD rats were randomly divided into normal control group,model group,polyene phosphatidylcholine(82.08 mg/kg)positive control group and Ershiwuwei Songshi Pill high(180 mg/kg),medium(90 mg/kg)and low(45 mg/kg)dose groups.The rats in each group were given corresponding drugs by intragastric administration for 3 d and fed normally.From the 4th d,all groups except the normal control group were fed with 15 mL/kg liquor(56%vol)for 7 d after 2 h of administration.After the last modeling,the levels of AST,ALT,TC,TG,SOD,GSH in serum and IL-1β,IL-6,TNF-αin liver tissue were measured.The protein expressions of Bax,Bcl-2 and Caspase3 were determined by Western blotting.HE staining was used to observe the pathological changes of liver tissue under light microscope.[Results]Compared with the model group,the body weight and the levels of SOD and GSH in the treatment group were significantly higher than those in the model group;liver index,serum ALT,AST,TC,TG,IL-1β,IL-6 and TNF-αlevels decreased significantly(P<0.01 or P<0.05);HE staining showed that there was a small amount of collagen proliferation and lymphocyte infiltration in connective tissue around the hepatic portal area in the model group,multiple inflammatory foci could be seen in the lobules,and round fat vacuoles could be seen in the cytoplasm;in each administration group,the pathological condition of the liver was mild.[Conclusions]Ershiwuwei Songshi Pill had a certain protective effect on acute alcoholic liver injury in rats,and its mechanism might be related to reducing enzyme,promoting lipid metabolism and anti-inflammation.展开更多
基金The Shenzhen Municipal Science and Technology Innovation Committee Project(JCYJ20190806160407178,JCYJ20180305164544288,JSGG20180504170427135,SGLH20180625141602256,JCYJ20180305164659637)the Shenzhen Key Laboratory of Musculoskeletal Tissue Reconstruction and Function Restoration(ZDSYS20200811143752005)supported this work。
文摘Postmenopausal osteoporosis is a common bone metabolic disorder characterized by deterioration of the bone microarchitecture,leading to an increased risk of fractures.Recently,circular RNAs(circ RNAs)have been demonstrated to play pivotal roles in regulating bone metabolism.However,the underlying functions of circ RNAs in bone metabolism in postmenopausal osteoporosis remain obscure.Here,we report that circ Stag1 is a critical osteoporosis-related circ RNA that shows significantly downregulated expression in osteoporotic bone marrow mesenchymal stem cells(BMSCs)and clinical bone tissue samples from patients with osteoporosis.Overexpression of circ Stag1 significantly promoted the osteogenic capability of BMSCs.Mechanistically,we found that circ Stag1 interacts with human antigen R(Hu R),an RNA-binding protein,and promotes the translocation of Hu R into the cytoplasm.A high cytoplasmic level of Hu R led to the activation of the Wnt signaling pathway by stabilizing and enhancing low-density lipoprotein receptor-related protein 5/6(Lrp5/6)andβ-catenin expression,thereby stimulating the osteogenic differentiation of BMSCs.Furthermore,overexpression of circ Stag1 in vivo by circ Stag1-loaded adeno-associated virus(circ Stag1-AAV)promoted new bone formation,thereby preventing bone loss in ovariectomized rats.Collectively,we show that circ Stag1 plays a pivotal role in promoting the regeneration of bone tissue via Hu R/Wnt signaling,which may provide new strategies to prevent bone metabolic disorders such as postmenopausal osteoporosis.
文摘原发性骨质疏松症(primary osteoporosis,POP)是一种以骨代谢改变、骨量降低、骨折风险增加为主要表现的常见慢性骨骼疾病。随着人口老龄化进程加快,亟须更为简便廉验的综合干预方案防治POP。中医药治疗POP具有独特优势,其中补肾填精、益气健脾、活血祛瘀类中药的配伍是POP中医临证常用思路。本文基于中国知网、万方、Web of Science等数据库总结归纳补肾健脾活血类方药治疗POP的临床和基础研究证据。提示补肾健脾活血类方药在提高患者骨密度(bone mineral density,BMD)、缓解疼痛、改善骨代谢标志物如血清碱性磷酸酶(alkaline phosphatase,ALP)、血清钙、白细胞介素(interleukin,IL)-6等方面收效显著。补肾健脾活血方药的作用机制是通过骨保护素(osteoprotegerin,OPG)/核因子(nuclear factor,NF)κB受体激活因子/核因子κB受体激活因子配体(receptor activator for NF-κB ligand,RANKL)、Wnt/β-连环蛋白(Wnt/β-catenin)、丝裂原活化蛋白激酶(mitogen-activated protein kinase,MAPK)与骨形成蛋白(bone morphogenic protein,BMP)-Smad等信号通路影响骨稳态进而治疗POP。补肾健脾活血类方药防治POP的临床疗效已经被证实,未来需要深化补肾健脾活血类方药“有效成分-单药-复方-作用机制-疾病靶点”的有机串联,深入挖掘其防治POP的科学内涵。
基金supported by NSFC(62273019,52072015,12332019,U20A20390)the 111 Project(B13003)。
文摘Dear Editor,This letter presents a biocompatible cross-shaped magnetic soft robot and investigates its deformation mode control strategy through COMSOL modeling and simulation.Magnetic soft robots offer novel avenues for precise treatment within intricate regions of the human body.
基金Special Fund Project for Basic Scientific Research of Central Universities(2018NZD19)Postgraduate Innovation Project of Southwest Minzu University(CX2018SZ80).
文摘[Objectives]To investigate the protective effect and mechanism of Ershiwuwei Songshi Pill on acute alcoholic liver injury in rats.[Methods]Sixty male SD rats were randomly divided into normal control group,model group,polyene phosphatidylcholine(82.08 mg/kg)positive control group and Ershiwuwei Songshi Pill high(180 mg/kg),medium(90 mg/kg)and low(45 mg/kg)dose groups.The rats in each group were given corresponding drugs by intragastric administration for 3 d and fed normally.From the 4th d,all groups except the normal control group were fed with 15 mL/kg liquor(56%vol)for 7 d after 2 h of administration.After the last modeling,the levels of AST,ALT,TC,TG,SOD,GSH in serum and IL-1β,IL-6,TNF-αin liver tissue were measured.The protein expressions of Bax,Bcl-2 and Caspase3 were determined by Western blotting.HE staining was used to observe the pathological changes of liver tissue under light microscope.[Results]Compared with the model group,the body weight and the levels of SOD and GSH in the treatment group were significantly higher than those in the model group;liver index,serum ALT,AST,TC,TG,IL-1β,IL-6 and TNF-αlevels decreased significantly(P<0.01 or P<0.05);HE staining showed that there was a small amount of collagen proliferation and lymphocyte infiltration in connective tissue around the hepatic portal area in the model group,multiple inflammatory foci could be seen in the lobules,and round fat vacuoles could be seen in the cytoplasm;in each administration group,the pathological condition of the liver was mild.[Conclusions]Ershiwuwei Songshi Pill had a certain protective effect on acute alcoholic liver injury in rats,and its mechanism might be related to reducing enzyme,promoting lipid metabolism and anti-inflammation.
