体外震波对骨微血管内皮细胞生理功能的影响

BACKGROUND: Extracorporeal shock wave has been shown to influence the physiological function of endothelial cells via the activation of mechanoreceptors and specific signal transduction system, and gene expression regulation. OBJECTIVE:To explore the impact of different energy flow densities and numbers of shots of extracorporeal shock waves on the new vessel formation ability, migration capability and apoptosis of bone microvascular endothelial cells. METHODS: Bone microvascular endothelial cells isolated from the femoral head of patients undergoing arthroplasty were subcultured in vitro, and then were immunofluorescently evaluated with endothelial cell marker antibodies to CD31 and von Willebrand factor (vWF), and grouped according to different energy flow densities (low, 0.03 mJ/mm2; high, 0.11 mJ/mm2) and numbers of shots (400 and 800). Capillary-like tube formation, migration capability and apoptosis of bone microvascular endothelial cells were determined by 3-D culture in vitro, scratch test, and flow cytometry, respectively. RESULTS AND CONCLUSION: vWF and CD31 were positively expressed in approximately 100% of bone microvascular endothelial cells, which indicates the cultured cells had characterization of microvascular endothelial cells. Extracorporeal shock wave enhanced angiogenesis and migration capability of bone microvascular endothelial cells derived from the femoral head, and especially low-energy flow density of extracorporeal shock wave exerted more superior effects. Angiogenesis of bone microvascular endothelial cells was decreased with the increased shot number in the low-energy flow density group. In addition, extracorporeal shock wave inhibited bone microvascular endothelial cell apoptosis induced by steroids. Our results suggest that energy flow density and number of shots of extracorporeal shock waves impact the physiological function of bone microvascular endothelial cells derived from the femoral head. 中国组织工程研究杂志出版内容重点：组织构建;骨细胞;软骨细胞;细胞培养;成纤维细胞;血管内皮细胞;骨质疏松;组织工程     

Mechanobiology and Cartilage Tissue Engineering

1 IntroductionThe cartilage is a hydrated connective tissue in joints that withstands and distributes mechanical forces. Chondrocytes utilize mechanical signals to maintain tissue homeostasis. They regulate their metabolic activity through complex biological and biophysical interactions with the extracellular matrix (ECM). Although some of the mechanisms of mechanotransduction are known today, there are certainly many others left unrevealed. Different topics of chondrocytes mechanobiology ha…     

Piezo1-mediated mechanical stress stimulation in anti-osteoporosis treatment北大核心

BACKGROUND: Piezo1 is a mechanosensitive channel that acts as an important target protein for mechanical stress stimulation. Piezo1 converts external mechanical forces into biological signals, regulating bone formation and bone resorption. Piezo1 plays an important role in anti-osteoporosis. OBJECTIVE: To summarize the mechanism of mechanical stress stimulation in anti-osteoporosis and research progress in Piezo1 molecular biology as well as the use of Piezo1 in the treatment of osteoporosis. METHODS: Relevant literature was retrieved in CNKI, WanFang, VIP, PubMed, and Web of Science databases using computers. The search terms were “osteoporosis, Piezo1, mechanical, osteoblast, osteoclast, chondrocyte, bone” in Chinese and English. Finally, 65 documents were included for review according to the inclusion and exclusion criteria. RESULTS AND CONCLUSION: The structure of Piezo1 has been continuously analyzed in the breakthrough of cryo-electron microscopy. Based on a three-bladed propeller 3D structure, Piezo1 exhibits different structural changes under silent and stressful states. Piezo1-mediated mechanical stress stimulation can affect bone formation by regulating the functions of osteoblasts, chondrocytes, endothelial cells and intestinal cells, and simultaneously affect bone resorption by regulating the function of osteoclasts, thereby playing an important role in anti-osteoporosis. Piezo1-mediated mechanical stress mainly affects bone formation by regulating the function of osteoblasts through the Wnt/β-catenin signaling pathway. And it has a two-way regulatory effect on osteoclasts due to different type, strength, and duration of mechanical force, which needs to be further quantified. For the use of Piezo1 in the treatment of osteoporosis, emphasis should be placed on clinical and animal model research for osteoporosis, osteoclast-related mechanisms, and new composite materials. © 2023, Publishing House of Chinese Journal of Tissue Engineering Research. All rights reserved.     

引导组织再生联合植骨修复根分叉病变的Meta分析

BACKGROUND: Numerous experimental and clinical observations have shown new attachment formation in the periodontium by guided tissue regeneration. OBJECTIVE: To evaluate the efficacy of guided tissue regeneration combined with bone grafting for the treatment of root furcation defects. METHODS: A computer-based online search combined with manual retrieval was conducted up to 2015 to screen the relevant English and Chinese literatures addressing guided tissue regeneration, bone grafting, and root furcation defects. Vertical and horizontal probing depth and attachment loss were analyzed. Meta-analysis was performed using Stata/SE version 12.0 software by extracting data from the relevant articles. Moreover, the publication bias was tested. RESULTS AND CONCLUSION: The meta-analysis results showed that at 6 months after treatment, the alterations in vertical probing depth and periodontal attachment were significantly increased after guided tissue regeneration compared with open-flap debridement (P < 0.000 01); the alterations and increment in the periodontal attachment were significantly increased after combined treatment of guided tissue regeneration and bone grafting compared with open-flap debridement (P < 0.000 01); the reduction in the vertical and horizontal probing depth and the increment in periodontal attachment were significantly increased after combined treatment of guided tissue regeneration and bone grafting compared with guided tissue regeneration (P < 0.000 01 or P = 0.01). At 12 months after treatment, the reduction in vertical probing depth and the increment in attachment loss were significantly increased after combined treatment of guided tissue regeneration and bone grafting compared with guided tissue regeneration (P < 0.000 01). These results indicate that the guided tissue regeneration combined with bone grafting in the treatment of root furcation defects is superior to guided tissue regeneration or open-flap debridement. In addition, in the latter two therapies, guided tissue regeneration shows a better therapeutic effect. However, the therapeutic effects of various types of regenerated membranes and bone grafts need further in-depth study to define the optimal treatment strategy. 中国组织工程研究杂志出版内容重点：组织构建;骨细胞;软骨细胞;细胞培养;成纤维细胞;血管内皮细胞;骨质疏松;组织工程     

血管化鹿茸软骨组织与骨组织修复

BACKGROUND:Deer antlers are the only known mammalian organ that can regenerate periodically, and its cartilage is rich in blood vessels. Study on deer antler vascularized cartilage can uncover the antler biological characteristics and is of vital significance for bone repair and regenerative medicine. OBJECTIVE:To review the distribution of blood vessels in antler cartilage tissue, the generating process and mechanism of blood vessels, cytokines influncing angiogenesis, and to analyze the features of deer antler models in bone tissue engineering, providing medical reference for bone repair. METHODS: A computer-based online search of PubMed and CNKI databases was performed using the keywords of “deer antler, bone tissue engineering, vascularized cartilage” in English and Chinese, respectively. Articles concerning antler histology, morphology, antler cartilage and vascularized cartilage and bone tissue engineering were enrolled and repetitive studies and irrelevant articles were excluded. RESULTS AND CONCLUSION: Fifty-one eligible articles were selected finally. Deer antler is a kind of periodic regenerative bone, and antler cartilage is different from normal cartilage that is rich in blood vessels with the growth speed of 2.7 cm/day. Scholars have studied the vascularization of antler cartilage tissue, and obtained some achievements. Exploring the distribution of antler blood vessels in cartilage tissue, the generating process and mechanism of antler blood vessels, the cytokines acting on antler angiogenesis, as well as analyzing the advantages of deer antler model for bone tissue engineering provide a reference for tissue-engineered cartilage vascularization. 中国组织工程研究杂志出版内容重点：组织构建;骨细胞;软骨细胞;细胞培养;成纤维细胞;血管内皮细胞;骨质疏松;组织工程     

骨组织工程中的间质干细胞：成骨活性、免疫特性、促血管化及成骨效应

BACKGROUND: It is still a challenge to repair bone defects caused by trauma, infection, tumor and congenital diseases. Bone tissue engineering is a promising method for bone defect repair showing important guiding significance in the clinic. OBJECTIVE: To review the progress of proliferation, osteogenic activity, immunogenicity, proangiogensis and in vivo osteogenic effect of mesenchymal stem cells in bone tissue engineering. METHODS: The first author retrieved Wanfang and PubMed datebase for literatures published from 2008 to 2016, using the keywords of “mesenchymal stem cell, tissue engineering, osteogenesis, immune property, angiogenesis” in Chinese and English, respectively. Articles regarding mesenchymal stem cells, tissue engineering, osteogenesis, immune property and angiogenesis were included, and repetitive and dated studies were excluded. Totally 1 772 articles were retrieved initially, and in accordance with inclusion and exclusion criteria, 41 eligible articles were included for review analysis. RESULTS AND CONCLUSION: Bone marrow mesenchymal stem cells and adipose-derived mesenchymal stem cells are extensively applied in bone tissue engineering. Studies have shown that the osteogenic activity of bone marrow mesenchymal stem cells is higher than that of adipose-derived mesenchymal stem cells, but its immune regulation effect is weaker than that of adipose-derived mesenchymal stem cells. Mesenchymal stem cells hold remarkable immune regulation (immunosuppression and immune enhancement) and tissue repair capacity, which can eliminate inflammatory reactions at injured sites, promoting tissue repair. Adipose-derived mesenchymal stem cells cultured under hypoxia environment can secret more angiogenic cytokines generating more vascular structures. Furthermore, increasing proof have confirmed that porous nano-polylactic acid combined with nano-carbon biological material can significantly promote the proliferation and osteogenesis of bone marrow mesenchymal stem cells. Taking its tumorigenesis into consideration, mesenchymal stem cells should be prudently used in the clinic. 中国组织工程研究杂志出版内容重点：组织构建;骨细胞;软骨细胞;细胞培养;成纤维细胞;血管内皮细胞;骨质疏松;组织工程     

Dental pulp stem cells in tissue engineering: Application and development北大核心

BACKGROUND: As a special source of stem cells, dental pulp stem cells (DPSCs) make much progress in the development of tissue engineering field due to their high proliferation and self-renewal ability. In the certain conditions DPSCs can be induced to differentiate into a variety of specialized tissue cells, providing a new way for tissue engineering development. OBJECTIVE: To review the main progress in the DPSCs biological characteristics, original source, isolation method, and its related application in tissue engineering research. METHODS: “Dental pulp stem cell, differentiation, regenerative medicine, tissue engineering” in English and Chinese were termed as the keywords to search relevant articles about DPSCs and tissue engineering published from 2005 to 2017 in PubMed, Medline, WanFang, and CNKI databases. After removal of repetitive or irrelevant articles, 66 articles were finally reviewed. RESULTS AND CONCLUSION: With the development of tissue engineering and regenerative medicine, the effective combination of DPSCs and tissue engineering scaffolds have be further achieved. Recent studies on DPSCs focus on the properties of DPSCs differentiating into odontoblasts and osteocytes/osteoblasts and on the potential of nerve repair, vascular remodeling, corneal reconstruction and chondrogenic differentiation. © 2018, Journal of Clinical Rehabilitative Tissue Engineering Research. All rights reserved.     

Composite scaffolds for bone tissue engineering: Application review and future direction北大核心

BACKGROUND: In general, a single-type artificial bone is difficult to meet the requirements for bone defect repair and extracellular matrix of bone tissue engineering. Compositing and processing the materials with different properties can form the composite-type artificial bone, which can either ensure the biological activity or effectively improve its mechanical properties. OBJECTIVE: To summarize the present situation of the application of composite-type artificial bone and prospects the development trend. METHODS: The literatures were retrieved from CNKI, ScienceDirect, PubMed, SpingerLink, EI Village, Wiley databases from January 2000 to April 2017. The key words were “composite scaffold, tissue engineering, artificial bone” in Chinese and English, respectively. The selected literatures were analyzed according to the inclusion and exclusion criteria. RESULTS AND CONCLUSION: The requirements for the scaffolds used for bone tissue engineering are complex and it should carefully consider and control various factors used in the design and preparation of scaffolds, including microporous structure, mechanical strength, degradation rate, porosity, growth factor, morphology and surface chemistry, so as to meet the bone tissue engineering applications. The preparation of tissue-engineered bone scaffold is based on biological active substances and matrix materials through a reasonable manner. It simulates the components of natural bone matrix, promotes the adhesion, proliferation and differentiation of bioactive substances, and gives play to its functions of osteogenesis. Although existing techniques and methods have made significant progress in the preparation of composite scaffolds, there is no technique or method to fully meet all the requirements for preparation of tissue-engineered bone scaffold. © 2018, Journal of Clinical Rehabilitative Tissue Engineering Research. All rights reserved.     

Application and characteristics of bone graft materials in the treatment of spinal tuberculosis北大核心

BACKGROUND: Thorough removal of local necrotic lesions and one-stage use of bone repair materials can significantly promote local bony fusion, avoid recurrence of tuberculosis in the middle and long terms and reconstruct spinal stability in the surgical treatment of spinal tuberculosis. OBJECTIVE: To review the application of bone graft materials in the treatment of spinal tuberculosis. METHODS: The first author searched the articles related to bone graft materials of spinal tuberculosis in Bailian, CNKI, and Natures databases published from 2001 to 2020. The priority was the articles published recently or in authoritative journals. The search keywords were “bone graft materials, bone tissue engineering; spinal tuberculosis; titanium mesh; autogenous bone” in Chinese and English. RESULTS AND CONCLUSION: At present, bone graft materials have been widely used in clinic, but each has its own disadvantages. For example, the amount of autologous bone is limited, and the transplantation of autologous bone will cause bleeding and potential complications of donor site; allogeneic bone will lead to delayed healing and infection; titanium mesh has the problems of postoperative subsidence and kyphosis correction angle loss; the organic polymer materials such as polylactic acid and polymethyl methacrylate are lack of bone induction performance. Although Ca/P-based ceramic materials can be used as carrier materials of antituberculosis drugs, their biomechanical properties cannot fully meet the clinical needs. In view of the shortcomings of the above materials, it is necessary to find a composite bone tissue engineering material, which can meet the requirements of good biocompatibility, mechanical properties, degradation properties, osteogenic activity, and drug release performance. © 2022, Publishing House of Chinese Journal of Tissue Engineering Research. All rights reserved.     

中药诱导骨髓间充质干细胞的定向分化：研究与进展

BACKGROUND: In recent years, in-depth studies that single Chinese herbs or extracts, compound traditional Chinese medicine and medicated serum are used to regulate the directional differentiation of bone marrow mesenchymal stem cells into myofibroblasts, chondrocytes, osteoblasts, myocardial cells and nerve cells, which have become a highlight in the tissue engineering research.OBJECTIVE: To review the latest progress in the directional differentiation of bone marrow mesenchymal stem cells induced by Chinese herbs or their extracts.METHODS: The first author searched the CNKI, Wanfang and PubMed databases using the keywords of “Chinese herb, directional differentiation, mesenchymal stem cells” in Chinese and English, respectively, to retrieve relevant articles published from January 2010 to January 2016. Repetitive articles or those with no originality were eliminated. Totally 99 articles were searched initially, and then 43 articles were included in result analysis.RESULTS AND CONCLUSION: As the strongest seed cells in the bone differentiation system, bone marrow mesenchymal stem cells have a wide range of directional differentiation potential, and highlight the important value in combination with Chinese herbs for clinical treatment of various refractory diseases, especially for treatment of metabolic bone diseases, bone defects, nonunion and delayed union, which is not only conducive to in-depth, multi-angle studies on effects and mechanisms of Chinese herbs, but also to clinical treatment of various refractory diseases using bone marrow mesenchymal stem cells.   中国组织工程研究杂志出版内容重点：干细胞;骨髓干细胞;造血干细胞;脂肪干细胞;肿瘤干细胞;胚胎干细胞;脐带脐血干细胞;干细胞诱导;干细胞分化;组织工程     

局部注射辛伐他汀对骨质疏松大鼠股骨髁骨小梁的改建效应

背景：局部注射具有成骨作用的辛伐他汀,可显著增加骨质疏松大鼠股骨颈及股骨髁部的骨密度及力学强度,分析局部注射辛伐他汀对股骨髁骨小梁的影响。 目的：进一步研究骨质疏松大鼠股骨内局部注射辛伐他汀对股骨髁骨小梁的影响。为将辛伐他汀应用于临床骨质疏松局部治疗提供实验基础。 方法：18只雌性SD大鼠双侧卵巢切除后3个月,制备大鼠骨质疏松模型。实验大鼠随机数字表法均分为3组,分别在实验大鼠的右侧股骨髓腔内单次注射辛伐他汀溶液5 mg、10 mg,对照组单纯注射空白载体。分别在注射后1个月处死大鼠并取材。Micro-CT扫描并定量分析骨组织形态变化。 结果与结论：给药后1个月,Micro-CT扫描结果显示,辛伐他汀治疗组的骨微结构参数如骨皮质厚度、骨小梁密度及连接率明显优于对照组。说明疏松骨骼单次注射小剂量辛伐他汀可显著促进股骨髁部骨小梁改建,改善骨骼微结构,可为强化局部、防治骨质疏松骨折的新选择进一步提供实验基础。     

Level of functioning of siblings and parents of probands of varying degrees of retardation

A further analysis of already published data supports the position that retardates of low ability level less frequently have retarded siblings, retarded parents, and parents low in occupational level than do retardates higher in ability level. The analysis supports the position that there are two types of retarded individuals, persons retarded as a result of gene or chromosomal anomalies, brain injury, etc., who more frequently occur in the lower-level retardate group, and persons whose retardation represents polygenic segregation, who more frequently occur in the higher-level group.     

石斛属民族药用植物的分类及生药学研究

中药石斛早在《神农本草经》中就被列为上品,其应用历史悠久,具有养阴生津、补肾益气、润喉护嗓、活血明目、抗癌防老等功效。本文对国内外石斛属民族药用植物的分类及生药学研究进行了综述。     

膝关节骨性关节炎的关节镜治疗体会

目的我科自2001～2005年4月对59例67膝的骨性关节炎（0A），进行关节镜检查及镜下清理术。方法镜检：膝关节骨性关节炎伴不同程度滑膜炎，滑膜皱壁粘连纤维片，关节软骨不同程度破坏。镜下清除增生滑膜，松解粘连，去除剥脱软骨、修复关节面。结果随访2月～4年，平均1.5年，术后综合评估2月～1年，优良率94％；1～2年，优良率79.2％；2年以上优良率54.8％。结论关节镜对膝关节骨性关节炎诊断能提供了比较全面的资料，并对骨性关节炎早期有良好疗效，具有创伤小、恢复快、并发症少和重复治疗等优点。     

Assessment of the efficacy of treatment of hemangiomas

Assessment of the aftereffects of cryoexposure and ultrahigh-frequency cryoexposure on hemangioma tissue of various types, cavernous and squamous, showed a higher cryogenic effect in hemangiomatous tissue preexposed to ultrahigh-frequency waves. A quantitative criterion is proposed for assessing the efficacy of the studied methods of exposure. Translated fromByulleten' Eksperimental'noi Biologii i Meditsiny, Vol. 119, N ^o 6, pp. 669–672, June, 1995     

Effect of route of antitoxin administration on efficacy of treatment of experimental tetanus

The efficacy of treatment with Diaform-3 antitoxin, given by either intracisternal or intralumbar injection in a dose of 400 i.u./kg, was compared in experiments on 100 rabbits with ascending, hematogenous, and cerebral tetanus caused by injection of 1 c.l.d. of tetanus toxin. Intracisternal injection of the antitoxin was found to be three times more effective than intralumbar (the proportion of animals cured was 31.4 and 10.2% respectively). The latter was effective only in animals with ascending tetanus, evidently because the portal of entry of the toxin into the CNS was along the peripheral nerves of the hind limbs.Central Research Laboratory, L'vov Medical Institute. (Presented by Academician of the Academy of Medical Sciences of the USSR A. M. Chernukh.) Translated from Byulleten' Éksperimental'noi Biologii i Meditsiny, Vol. 86, No. 8, pp. 212–213, August, 1978.     

Effect of ultralow doses of thyroliberin on microviscosity of lipid components of biological membranes

Effects of the regulatory peptide thyroliberin on microviscosity of lipid components of endoplasmic reticulum biological membranes in mouse hepatocytes were studied by electron paramagnetic resonance. Thyroliberin in a concentration of 10⁻³–10⁻¹⁸ M decreased microviscosity of surface layers of membrane lipids. This decrease was the most pronounced (30%) under effects of 10⁻¹⁰ and 10⁻¹⁶ M thyroliberin. Physiological effects of thyroliberin corresponded to its influence on the membrane structure. Translated fromByulleten' Eksperimental'noi Biologii i Meditsiny, Vol. 129, No. 1, pp. 38–40, January, 2000     

Pathways of the realization of immunomodulating effects of neurotransmitters

Translated fromByulleten' Eksperimental'noi Biologii i Meditsiny, Vol. 115, N ^o 4, pp. 401–404, April, 1993