骨髓间充质干细胞修复系膜增生性肾炎：作用及机制

BACKGROUND: Bone marrow mesenchymal stem cells are likely to repair renal injury by differentiating into renal parenchymal cells. OBJECTIVE: To explore the effect and mechanism of bone marrow mesenchymal stem cells in the renal repair after mesangial proliferative glomerulonephritis. METHODS: Thirty Sprague-Dawley rats were randomized into normal group, model group and treatment group (n=10 per group). Model group and treatment group were treated with tail vein injection of mouse anti-rat monoclonal antibody Thy1.1 to prepare mesangial proliferative glomerulonephritis models. One week after modeling, rats in the treatment group were given 2×106 bone marrow mesenchymal stem cells via the tail vein, and rats in the other two groups were given the same volume of normal saline. Two weeks after transplantation, urinary protein, urea nitrogen, creatinine levels were detected; hematoxylin-eosin staining was used for observing pathological changes of the renal tissue under microscope; and the expression of transforming growth factor beta 1 was detected by immunohistochemistry method. RESULTS AND CONCLUSION: The levels of urinary protein, urea nitrogen and creatinine as well as the expression of transforming growth factor beta 1 in the renal tissue arranged in descending order were listed as follows: model group > treatment group > control group, and there were significant differences among three groups (P < 0.05). In the model group, diffuse glomerular hyperplasia was observed with the presence of increased extracellular matrix, partial glomerular sclerosis, and interstitial infiltration of inflammatory cells; in the treatment group, glomerular hyperplasia, mesangial proliferation and inflammatory cell infiltration were all mitigated compared with the model group. Therefore, bone marrow mesenchymal stem cell transplantation may contribute to renal repair after mesangial proliferative glomerulonephritis, by inhibiting overexpression of transforming growth factor beta 1 in the kidney. 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      

生长因子对骨骼肌损伤与修复的作用

BACKGROUND: Growth factors involved in the regulation of cellular processes play an important role in the wound healing and tissue regeneration. OBJECTIVE:To elaborate the role of a variety of cellular processes involving growth factors in the repair of skeletal muscle injury, and to provide the references for the treatment and rehabilitation strategies, and the synthesis of biomaterials with growth factor for the skeletal muscle after injury. METHODS: A computer-based online search was conducted in PubMed, Mendeley, Google Scholar, and CNKI databases from 1995 to November 2015 to screen the relevant literatures using the keywords “skeletal muscle, damage repair, insulin-like growth factor, epidermal growth factor, growth factor”. Data screening, processing, and summary were performed. RESULTS AND CONCLUSION: Fifty-one eligible literatures were included. Exercise training promotes the repair and regeneration of the injured skeletal muscle cells and the recovery of the function by activating satellite cells in the sarcolemma and basement membrane to produce the numerous myoblasts. The repair involves the complex biological process regulated by growth factors. Exogenous growth factors up-regulate the mRNA expression of endogenous growth factors, stimulate the proliferation of the myoblasts, accelerate the fusion between myotubes and muscle fibers, promote the repair of skeletal muscle injury, inhibit the formation of scars, thereby enhancing the healing quality. 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     

人血管内皮细胞生长因子121基因修饰材料修复桡骨火器性骨缺损

BACKGROUND: Bone defects are the leading cause of nonunion after firearm injury. Firearm injury is relatively special. Autograft and allograft all have big drawbacks, which cannot meet the requirements of basic-level hospitals. Using tissue-engineered bone with good blood vessels and osteogenic capability in repair of firearm bone defect will be an ideal and feasible restoration method.OBJECTIVE:To explore the application of human vascular endothelial growth factor 121 gene-modified materials in the repair of firearm-induced radial injury in rabbits.METHODS:A total of 128 rabbits were randomly divided into surgical injury group and firearm injury group (n=64 per group). In the firearm injury group, 0.25 g steel ball was launched using 56-style musket to establish a firearm radial injury model; in the surgical injury group, surgical methods were used to produce a 1.2 cm radial injury model. Human vascular endothelial growth factor 121 gene-modified materials were used. The related histocytes from rabbits were harvested to obtain bone marrow stromal cells for culture. A porous scaffold material was prepared. The obtained materials were respectively implanted into radial defect sites in the surgical injury and firearm injury groups. The application of human vascular endothelial growth factor 121 gene-modified materials in rabbit radial defect repair was analyzed.RESULTS AND CONCLUSION:Compared with the surgical injury group, at 8, 12 and 16 weeks after repair, the gray level ratio of bone defect site and the anti-compression mechanical ratio at the healthy and repairing sides of the radius in the firearm injury group were decreased (P < 0.05), and the new bone area increased (P < 0.05). At 2 and 4 weeks after repair, the local blood flow at the repair area was significantly increased (P < 0.05). These results suggest that compared with the surgical injury group, the curative effect of human vascular endothelial growth factor 121 gene is more ideal in the firearm injury group because of the emergence of local ischemia and hypoxia in the process of radial defect repair. Human vascular endothelial growth factor 121-modified material can repair bone marrow stromal cells. The application of human vascular endothelial growth factor 121 in firearm burns can enhance the synthesis and secretion of angiogenic factors, improve the local blood flow, reduce anti-compression mechanical ratio, and increase the new bone area. 中国组织工程研究杂志出版内容重点：生物材料;骨生物材料; 口腔生物材料; 纳米材料; 缓释材料; 材料相容性;组织工程     

胰岛素干预对糖尿病大鼠骨折愈合及骨痂内细胞因子的影响

BACKGROUND: Fracture healing in diabetic patients is usually unsatisfactory because of hormones and metabolic disorder, and an eventual multiple organ dysfunction resulting from high blood glucose. OBJECTIVE: To dynamically observe the changes of cytokines during the fracture healing process in diabetic rats before and after insulin treatment. METHODS:A total of 120 Sprague-Dawley rats were included in this study. Of them, 90 rats intravenously injected with 5% tetraoxypyrimidine to induce rat models of diabetes were randomized into insulin treatment and diabetes groups, respectively. The remaining 30 rats were intravenously injected with equal volume of saline and selected as control group. The next day, blood glucose was determined. Healing at 1, 4, and 8 weeks after fracture were observed by the X-ray film. Biomechanical strength of the injured right tibia was measured at 4, 6, and 8 weeks after modeling. Cytokines in the osteotylus were determined by immunohistochemical staining and in situ hybridization technique. RESULTS AND CONCLUSION: The X-ray films showed that the speed of fracture healing in the diabetes group was slower than insulin treatment and control groups. Biomechanical strength of the osteotylus in the diabetes group was significantly decreased compared with the insulin treatment and control groups. However, there were no significant differences in above-mentioned parameters between the control and insulin treatment groups. Bone morphogenetic protein 2, basic fibroblast growth factor, transforming growth factor-beta, and vascular endothelial growth factor were widely expressed in the osteotylus and their expressions in diabetes group were significantly lower and slower than those in the control and insulin treatment groups. There was no statistical difference between control and insulin treatment groups. These results indicate that osteotylus formation speed, biomechanical strength, and growth factor expressions at the fracture site in diabetes rats were decreased compared with normal rats. Insulin treatment can enhance cytokine levels at the fracture site, thereby promoting the osteoblast proliferation and fracture healing. 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     

同种异体来源骨髓间充质干细胞移植可改善衰老心脏的功能

BACKGROUND: Bone marrow mesenchymal stem cells can secrete a variety of factors in the local lesion, and these factors can promote cell proliferation and inhibit cell apoptosis. OBJECTIVE: To observe the curative effect of bone marrow mesenchymal stem cell transplantation on the aging heart of rats and to explore the possible mechanism of action. METHODS: Thirty Sprague-Dawley rats were randomized into three groups: normal blank group, model group and treatment group. Aging models were made in the latter two groups by injection of D-galactose. Rats in the treatment group were given allogeneic bone marrow mesenchymal stem cell injection, once a week, totally four times. At 1 week after final injection, the heart tissues were sliced into sections to observe the pathological changes using hematoxylin-eosin staining. Western blot assay was used to detect the expression of basic fibroblast growth factor in the heart tissues. Real-time PCR was used to measure the expression of p53 mRNA in the heart tissues. RESULTS AND CONCLUSION: Bone marrow mesenchymal stem cell transplantation could improve the pathological morphology of the aging heart. Compared with the model group, the expression of basic fibroblast growth factor in the heart tissues was significantly higher in the treatment group (P < 0.05), but the mRNA expression of p53 was lower (P < 0.05). It is speculated that bone marrow mesenchymal stem cells can interact with heart cells to secrete basic fibroblast growth factor and reduce p53 mRNA expression, thereby playing a curative effect on the aging heart.  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     

Application of concentrated growth factor and epidermal growth factor in the field of oral and maxillofacial soft and hard tissue injury repair北大核心

BACKGROUND: Oral and maxillofacial region is a sensitive part of beauty in appearance, and its damage often involves both soft and hard tissues. Concentrated growth factor and recombinant human epidermal growth factor can promote the repair and regeneration of local soft and hard tissue injury, which has become a new research hotspot in recent years. OBJECTIVE: To review the research progress and application of concentrated growth factor and recombinant human epidermal growth factor in the repair of soft and hard tissue injury in oral and maxillofacial region, and discuss the limitations of current research and the possibility of their combined application in the future. METHODS: The English search terms were “CGF, concentrated growth factor, rhEGF, recombinant human epidermal growth factor, tissue regeneration” and the Chinese search terms were “concentrated growth factor, epidermal growth factor, tissue engineering, tissue regeneration, oral and maxillofacial region”. Relevant articles about concentrated growth factor and recombinant human epidermal growth factor were searched in CNKI and PubMed databases. The retrieval time was from 2011 to 2021. Finally, 63 articles were selected. RESULTS AND CONCLUSION: (1) In this paper, the biological characteristics and sources of concentrated growth factor and recombinant human epidermal growth factor were briefly introduced. The research progress and clinical application status of concentrated growth factor and recombinant human epidermal growth factor in promoting the proliferation and differentiation of stem cells related to the regeneration of soft and hard tissues in oral and maxillofacial regions were emphatically summarized. The limitations of current research and possible application directions in the future were discussed. (2) Concentrated growth factor contains a variety of growth factors and CD34+ cells, which can promote the growth, proliferation, migration and differentiation of a variety of tissue cells, especially stem cells, and play an important role in tissue injury repair. (3) Concentrated growth factor is widely used in implant surgery, autologous tooth transplantation, jaw cyst resection, gingival surgery, debridement and suture, which can relieve pain, reduce inflammation, and improve postoperative bone regeneration effect and aesthetic effect. (4) Recombinant human epidermal growth factor has a great development space in soft tissue and nerve regeneration. It has been proven that recombinant human epidermal growth factor can promote a variety of stem cells to differentiate into neuron-like cells, and also induce adipocytes to differentiate into epidermal cells. Most clinical studies suggest that recombinant human epidermal growth factor can promote healing of oral ulcers and reduce scar formation. (5) “Concentrated growth factor + recombinant human epidermal growth factor” combined with adipose-derived stem cells and other stem cells that can be easily obtained have the possibility of directional formation of oral and maxillofacial soft and hard tissue. In the future, it may fill the deep oral and maxillofacial tissue defects caused by trauma, tumor resection, and promote the repair and regeneration of damaged nerves. (6) Trying to use “concentrated growth factor + recombinant human epidermal growth factor” for refractory oral ulcers, periodontal surgery, dental implants, oral and maxillofacial trauma surgery is also a new way to improve oral and maxillofacial function and appearance. Collagen sponge and chitosan membrane may be used as carriers of “concentrated growth factor + recombinant human epidermal growth factor” to facilitate shaping and prolong the action time of the composite. © 2023, Publishing House of Chinese Journal of Tissue Engineering Research. All rights reserved.     

内皮样细胞与脐静脉内皮细胞的比较

BACKGROUND: Stem cells are induced to differentiate into endothelial-like cells that can be used for the treatment of diabetic lower extremity vascular disease. However, it is unclear whether these endothelial-like cells can completely replace endothelial cells to improve vascular disease and what are the differences between endothelial-like cells and endothelial cells. OBJECTIVE: To explore the differences and similarities between endothelial-like cells and human umbilical vein endothelial cells in the aspects of morphology, function, and viability. METHODS: Umbilical cord mesenchymal stem cells and umbilical vein endothelial cells were isolated, cultured and identified using flow cytometry and immunohistochemical method. Isolated umbilical cord mesenchymal stem cells were induced in DMEM-LG/F12 containing 10 µg/L vascular endothelial growth factor, 10 µg/L basic  fibroblast growth factor and 2% fetal bovine serum to differentiate into endothelial-like cells followed by immunohistochemical identification. To compare endothelial-like cells with human umbilical vein endothelial cells, cell migration detection, active substance measurement and three-dimensional angiogenesis test were performed. RESULTS AND CONCLUSION: Isolated umbilical cord mesenchymal stem cells strongly expressed the surface markers of mesenchymal stem cells, and human umbilical vein endothelial cells strongly expressed CD31 and VWF. After induction, the umbilical cord mesenchymal stem cells were identified to highly express CD31 and VWF. Through cell migration, active substance and three-dimensional angiogenesis tests, endothelial-like cells were similar to endothelial cells in the function and activity, and superior to endothelial 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     

The Ability of Tissue Engineered Skin Accelerating the Closure of Different Wound

1 Introduction In the past several decades, a number of reseacher have described the principal efficacy of tissue engineered skin to promote wound healing of venous and diabetic ulcers. But the true value of tissue-engineered skin products in different wound care remains yet to be more clearly defined. In this trial, we analysis the effective of tissue-engineered skin (ActivSkin) in the management of burns,donor sites and ulcers, which were also the frequently injury caused with warfare, disaster and terrorist incident.     

Morphological MRI and T2 mapping of cartilage repair tissue after mosaicplasty with tissue-engineered cartilage in a pig model

The aim of this study was to evaluate the efficacy of mosaicplasty with tissue-engineered cartilage for the treatment of osteochondral defects in a pig model with advanced MR technique. Eight adolescent miniature pigs were used. The right knee underwent mosaicplasty with tissue-engineered cartilage for treatment of focal osteochondral defects, while the left knee was repaired via single mosaicplasty as controls. At 6, 12, 18 and 26 weeks after surgery, repair tissue was evaluated by magnetic resonance imaging （MRI） with the cartilage repair tissue （MOCART） scoring system and T2 mapping. Then, the results of MRI for 26 weeks were compared with findings of macroscopic and histologic studies. The MOCART scores showed that the repaired tissue of the tissue-engineered cartilage group was statistically better than that of controls （P 〈 0.001）. A significant correlation was found between macroscopic and MOCART scores （P 〈 0.001）. Comparable mean T2 values were found between adjacent cartilage and repair tissue in the experimental group （P 〉 0.05）. For zonal T2 value evaluation, there were no significant zonal T2 differences for repair tissue in controls （P 〉 0.05）. For the experimental group, zonal T2 variation was found in repair tissue （P 〈 0.05）. MRI, macroscopy and histology showed better repair results and bony incorporation in mosaicplasty with the tissue-engi- neered cartilage group than those of the single mosaicplasty group. Mosaicplasty with the tissue-engineered cartilage is a promising approach to repair osteochodndral defects. Morphological MRI and T2 mapping provide a non-invasive method for monitoring the maturation and integration of cartilage repair tissue in vivo.     

The Ability of Tissue Engineered Skin Accelerating the Closure of Different Wound

1 IntroductionIn the past several decades, a number of reseacher have described the principal efficacy of tissue engineered skin to promote wound healing of venous and diabetic ulcers. But the true value of tissue-engineered skin products in different wound care remains yet to be more clearly defined. In this trial, we analysis the effective of tissue-engineered skin (ActivSkin) in the management of burns, donor sites and ulcers, which were also the frequently injury caused with warfare, disa…     

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.     

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。     

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。     

Anatomical study of distribution of valves of the cutaneous veins of adult''s limbs

Since the cutaneous veins of the four limbs have been used as autogenous grafts in the treatment of cardiovascular disorders, knowledge of distribution of the valves is increasingly required depending upon the use. In the gross anatomical study of distribution of valves of the trunci venae, there has been argument about locational relationships between the venous roots and the valves in the vicinity of the roots and the inter-valvular distance. However, there have been only few reports discussing detailed information about valves of the cutaneous veins of the four limbs. The authors observed patterns of distribution of the cutaneous venous valves of the four limbs of cadavers prepared for practice in anatomy. The following parts were excised from each cadaver: the cephalic, basilic, and the great saphenous veins, which originate from the acral venous network and flow into the proximal deep veins, and the venous roots communicating with these veins. An incision was made on each excised vein in the direction of the long axis under observation with a stereoscopic microscope, and the inter-valvular distance and the distance between the valve and the orifice of venous root in the vicinity of the valve were measured. The inter-valvular distance varied with type of the truncus venae, and it varied according to area even in the same truncus venae.     

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     

Characterization of sterols of three digenetic trematodes of buffalo

Sterols of three digenetic trematodes were isolated and characterized by infrared and 1H nuclear magnetic resonance spectroscopies, and gas-liquid chromatography and gas chromatography-mass spectrometry. Sterols identified were cholesterol, cholestanol, 24-methylcholesterol, 24-methylcholestanol, 24-ethyl-22-dehydrocholesterol, 24-ethyl-22-dehydrocholestanol, 24-ethylcholesterol and 24-ethylcholestanol.     

Mechanisms of generation of slow components of bioelectric activity in diagnostics of functional state of the gastrointestinal tract

New electrophysiologic devices were used for the diagnostics of the state of excitable structures in the gastrointestinal tract and correction of their motor functions. Bioelectrical and biomechanical activities form the basis of functioning of internal organs. The mechanisms of generation of slow bioelectrical activity that are important for clinical and physiological studies are described. One of these mechanisms is a capacitance parametric transducer converting the energy of contractions into specific electric signals reflecting muscle functions. Another mechanism results from slow oscillations of resting potentials of interrelated excitable cells in large neuromuscular structures of internal organs. The elaborated procedure is efficient for preventing early postoperative paresis of the gastrointestinal tract. Translated fromByulleten' Eksperimental'noi Biologii i Meditsiny, Vol. 128, No. 10, pp. 448–452, October, 1999     

胃小弯侧血管弓的MDCT解剖

目的：研究正常胃小弯侧血管弓及其属支血管的多排螺旋CT表现。方法：回顾性分析51例正常成人的上腹部CT资料,观察胃小弯侧血管弓及其属支血管的显示情况、血管弓形态及其与胃壁的关系。结果：51例均显示胃小弯侧血管弓,血管弓贲门部属支、胃体部属支和幽门部属支分别显示46例、15例和10例;血管弓与胃壁紧邻41例。结论：MDCT检查可良好显示正常胃小弯侧血管弓及其属支血管。     

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