The spirit of the Party′s "20th Congress" illuminates the development direction of orthopedics in China / 中华创伤杂志

The 20th National Congress of the Communist Party of China held in 2022 draws a blueprint for China′s future development, which is of epoch-making historical and political significance. The spirit of the congress has provided a clear direction and guidance for the high-quality development of orthopedics in China. The orthopedics in China gains significant progress, but there still remain many problems, for which the solution needs a guiding light. The "six persistences" proposed in the report of the congress for the development of orthopedics in China lights the voyage forward. Guided by the spirit of the congress, let us orthopedic surgeons set sail, cut the waves, and strive to write a new chapter in the development of orthopedics in China!

C-phycocyanin inhibits epithelial-mesenchymal transformation ofTGF-β1-induced cervical cancer Caski cells / 中国肿瘤生物治疗杂志

@# Objective: To investigate the effect of C-phycocyanin (C-PC) on the epithelial-mesenchymal transition (EMT) of cervical cancer Caski cells induced by transforming growth factor beta1 (TGF-β1). Methods: According to different treatment methods, Caski cells were divided into three groups: 10 ng/ml TGF-β1 treatment group, 10 ng/ml TGF-β1+300 μg/ml C-PC co-treatment group and control group (untreated). After 24 h of treatment, the morphological changes of Caski cells were observed, and the effects of TGF-β1 and C-PC on the migration and invasion of Caski cells were detected by Scratch test and Transwell test, respectively. Western blotting was used to detect the effect of C-PC on the expression of epithelial phenotypic marker protein E-cadherin and stromal phenotypic marker protein N-cadherin in TGF-β1-induced Caski cells, and qPCR was used to detect the mRNA expressions of EMT related factors Snail, Zeb1 and Twist. Results: Caski cells in the TGF-β1 treatment group lost the characteristics of the original epithelial phenotype, while the cells in the TGF-β1+C-PC co-treatment group maintained the characteristics of normal epithelial phenotype; the migration rate ([60.0±1.4]% vs [33.5±2.2]%, [40.0±2.8]%, both P<0.05) and the number of invasive transmembrane cells ([108.2±6.2] vs [25.2±3.1], [39.8±5.4], both P<0.01]) of Caski cells in the TGF- β1 treatment group were significantly higher than those in the co-treatment group and the control group. Compared with the control group, the expression of E-cadherin in Caski cells treated with TGF-β1 decreased significantly (P<0.05), while the mRNA expressions of Twist, Snail and Zeb1 increased significantly (all P<0.05); However, co-treatment with C-PC reversed above changes (P<0.05 or P<0.01), and significantly decreased the protein expression level of N-cadherin (P< 0.05). Conclusion: C-PC treatment can inhibit the invasion and metastasis ability of Caski cells induced by TGF-β1 and further affects the EMT process. The mechanism may be related to the decrease of mRNAexpressions of Twist, Snail and Zeb1 by C-PC treatment. ·

Mechanical Reinforcement Strategy of Calcium Phosphate Cements by Loading Polymers / 中国医疗器械杂志

Calcium phosphate cement (CPC) is well known for the excellent bioactivity and biocompatibility, however, CPC has been used only for the repair of non-load bearing bone defects due to its brittle nature and low flexural strength. Polymer reinforced CPC has been considered as one of the most effective strategies for mechanical reinforcement. This paper summarizes various kinds of polymers loaded CPC:fiber reinforcement, microsphere reinforcement and dual setting cements. It is aimed to analyze the advantages, disadvantages and principles of the polymers reinforced CPC, and so as to lay a foundation for the further research of improving and manufacturing the CPC with ideal mechanical properties.

Targeted antitumor effects of C-PC/CMC-CD55sp nanospheres on cervical carcinoma Caski cells / 中国肿瘤生物治疗杂志

@# Objective: To prepare a new type of phycocyanin/carboxymethyl chitosan-CD55 ligand peptide (CPC/CMC-CD55sp) nanospheres, and to study its targeted therapeutic effect on cervical cancer Caski cells. Methods: The novel CPC/CMC-CD55sp nanospheres (CPC/CMC-CD55sp) were synthesized by ionic cross-linking method, and the properties of nanospheres were observed by transmission electron microscopy (DLS) and fourier transform infrared spectroscopy (FTIR). The expression of CD55 on the surface of Caski and fibroblast (L-929) cells was detected by Western blotting and flow cytometry. The effect of nanospheres on the proliferation of Caski cells was detected by CCK-8. Flow cytometry and fluorescence microscopy were used to detect the uptake of microspheres by Caski cells; Western blotting and flow cytometry were used to detect the effect of CPC/CMC-CD55sp on expressions of apoptosis-related proteins and apoptosis rate in Caski cells; the hemolysis test was used to determine the biological safety of the drug. Results: CPC/ CMC-CD55sp was successfully prepared with good morphology and uniform diameter; and CD55 was highly expressed on the surface of Caski cells but low expressed on the surface of L-929 cells (P<0.01). CPC/CMC-CD55sp could targeted and efficiently reach Caski cells and be ingested into the cells. It exhibited weak hemolysis effect on human peripheral blood, which was in the safe range. CPC/ CMC-CD55sp displayed obvious inhibitory effect on Caski cell proliferation, and could induce cell apoptosis (P<0.05 or P<0.01). Conclusion: The new CPC/CMC-CD55sp can targeted inhibit the growth of cervical cancer Caski cells via inducing its apoptosis and has good bio-safety, which provides a new idea for the research and development of anti-tumor marine drugs.

DNA Vaccines Encoding Toxoplasma gondii Cathepsin C 1 Induce Protection against Toxoplasmosis in Mice

Toxoplasma gondii cathepsin C proteases (TgCPC1, 2, and 3) are important for the growth and survival of T. gondii. In the present study, B-cell and T-cell epitopes of TgCPC1 were predicted using DNAstar and the Immune Epitope Database. A TgCPC1 DNA vaccine was constructed, and its ability to induce protective immune responses against toxoplasmosis in BALB/c mice was evaluated in the presence or absence of the adjuvant α-GalCer. As results, TgCPC1 DNA vaccine with or without adjuvant α-GalCer showed higher levels of IgG and IgG2a in the serum, as well as IL-2 and IFN-γ in the spleen compared to controls (PBS, pEGFP-C1, and α-Galcer). Upon challenge infection with tachyzoites of T. gondii (RH), pCPC1/α-Galcer immunized mice showed the longest survival among all the groups. Mice vaccinated with DNA vaccine without adjuvant (pCPC1) showed better protective immunity compared to other controls (PBS, pEGFP-C1, and α-Galcer). These results indicate that a DNA vaccine encoding TgCPC1 is a potential vaccine candidate against toxoplasmosis.

Research ethics training of trainers: developing capacity of bolivian health science and civil society leaders / Formación en ética de investigación para profesionales: desarrollando capacidades para las ciencias de la salud y líderes de la sociedad civil en Bolivia / Pesquisa ética no treinamento de estagiários: desenvolvendo a capacitação da ciência da saúde boliviana e em líderes da sociedade civil

Research and research ethics (RE) capacity is a key element for addressing health priorities of low - and middle-income countries (LMICs). With support from a NIH/FIC Research Ethics Education and Curriculum Development grant, a RE Training of Trainers (TOT) was implemented in Bolivia. The Steering Committee, including representatives from four Bolivian universities and PAHO, developed the RE TOT that included face-to-face, online and practicum components. Twenty trainees including faculty, researchers and community leaders participated. Pre/Posttest results demonstrated significant increases in overall RE knowledge (13.1% improvement, p-value < 0.0001). An evaluation demonstrated participants valued participatory learning strategies and the flexibility of the online component. TOT participants during the practicum component delivered RE workshops to their university and civil society communities in four regions (n= 3,700 people). The goals of the grant were accomplished through the development of a Steering Committee and implementation of the TOT course. Next steps include the design and implementation of a master’s level research ethics education program in Bolivia.

La capacidad de investigación y ética de la investigación (EI) es un elemento clave para hacer frente a las prioridades de salud de los países de ingresos bajos y medios (PIBM). Con el apoyo de la subvención de ética de la Investigación de NIH/FIC, una capacitación para capacitadores (CPC) fue implementado en Bolivia. El Comité Directivo, que incluye representantes de universidades y la OPS, desarrolló un CPC en EI que incluía componentes presenciales, virtuales y de práctica. Veinte participantes, incluyendo docentes, investigadores y líderes de la comunidad participaron. Los resultados de la pre/post prueba demostraron aumentos significativos en el conocimiento de EI (13,1% de mejora, valor de p< 0,0001). Una evaluación demostró que los participantes valoraron las estrategias de aprendizaje y la flexibilidad del componente virtual. Durante el componente de prácticas, los participantes hicieron talleres de EI que fueron presentados a sus comunidades universitarias y a la sociedad civil en cuatro regiones (n = 3,700 personas). Los objetivos de la subvención se llevaron a cabo mediante el desarrollo de un Comité Directivo y la implementación del CPC. Los próximos pasos incluyen el diseño e implementación de un programa de educación en ética de investigación a nivel de maestría en Bolivia.

Capacitação em pesquisa e ética em pesquisa (RE) de capacidade é um elemento-chave para abordar as prioridades de saúde em países de baixa e média renda (LMICs). Com o apoio de bolsa do NIH / FIC Research Ethics Education and Curriculum Development, uma RE Training of Trainers (TOT) foi implantada na Bolívia. O Comitê Dirigente, incluindo representantes das universidades bolivianas e PAHO, desenvolveu a RE TOT que envolveu modo presencial, online e componentes práticos. Participaram vinte estagiários, incluindo faculdades, pesquisadores e líderes comunitarios. Resultados pré / pós-teste demonstraram aumentos significativos no conhecimento RE geral (melhoria de 13,1%, p <0,0001). Uma avaliação demonstrou participantes valorizados por estratégias de aprendizagem participativa e a flexibilidade do componente online de participantes. Participantes TOT realizaram workshps da prática RE fornecida às suas comunidades universitárias e à sociedade civil em quatro regiões (n = 3.700 pessoas). Os objetivos da subvenção foram realizadas através do desenvolvimento de uma Comissão de Coordenação e implementação do curso TOT. Os próximos passos incluem a concepção e implementação de programa de educação em ética da investigação, ao nível de mestrado, na Bolívia.

Teaching practice of CPC in PCMC pathology experiment course / 中华医学教育探索杂志

Objective To investigate the teaching effect of the PCMC-type (problem-originated clinical medical curriculum) pathology experiment course and clinical pathological conference (CPC) by using microscope digital system.Methods 384 undergraduates of second grade in clinical medicine major and imaging diagnosis major were chosen for the teaching reform project,all of whom were divided into experimental group (192) and control group (192),randomly,and they were taught by PCMC pathological experiment teaching and the traditional pathological experiment teaching separately.After the curriculum,statistic analysis of test score was used to analyze the teaching effect.SPSS 13.0 software diagram method was used to perform Levene variance analysis and t test to the achievement of two groups of students and the students' ability of self evaluation was investigated through questionnaire.Results The average score of the students in the experimental group (86.16 ± 3.28) in the theory exam was significantly higher than that of control group (75.63 ± 2.24) (P=0.000).And the average score of the students in the experimental group in experiment (27.10 ± 0.61) was significantly higher than that in control group (19.87 ± 0.25) (P=0.000).The questionnaire showed that compared with control group,the comprehensive ability of the students in the experimental group was obviously enhanced.Conclusion The PCMC pathology teaching is beneficial to improving the students' ability of linking theory with practice and enhancing their ability to analyze and solve problems,and obviously stimulate their interest in learning.It is worth promoting.

The cytotoxicity of injectable PHEMA/CPC composite hydrogel and it's effect on cell apoptosis / 实用口腔医学杂志

Objective:To study the cytotoxicity of PHEMA /CPC composite hydrogel.Methods:L929 cells were cultured by RP-MI1 640 with 1 0% fetal bovine serum(blank control),with PHEMA /CPC extraction(experimental group),high density polyethy-lene(HDPE)extracts(negative control)and 5% DMSO(positive control)for 24,48 and 72 h respectively.The cell proliferation was examined by MTT assay.Cell apoptosis was detected by flow cytometry and Annexin V-FITC /PI kit.Results:The A value of positive control group decreased with the increase of culture time(P 0.05).The cytotoxicity of the experimental group was grade Ⅰ.That of other groups increased with the increase of culture time. Cell apoptosis(%)in PHEMA /CPC composite hydrogel group and blank group was 4.21 ±0.30 and 4.89 ±0.39 respectively(P>0.05).Conclusion:Injectable PHEMA /CPC composite hydrogel has no cytotoxicity and no effect on cell apoptosis.

Periapical tissue reaction to calcium phosphate root canal sealer in porcine model.

Background: Calcium phosphate cements (CPC) are a group of biomaterials possessing wide scope of use in various branches of medical science. These materials have been proposed to be highly biocompatible and osteoconductive. This study is based on a newly developed CPC formulation (Chitra-CPC) and is aimed at the evaluation of its biocompatibility through an Endodontic Usage Test in a porcine study model. Objective: To evaluate the periapical tissue reaction to Chitra-CPC when used as a root canal sealer/filler material in comparison with a resin sealer, AH Plus (Dentsply). Materials and Methods: The procedure was done on porcine animal model following the ISO 7405 criteria. The material was implanted intentionally into the periapical area of 36 teeth through a root canal procedure carried out in six animals which were divided equally among 1-month and 3-month time periods. Results were based on the histological evaluation of the autopsied specimens after the prescribed time periods. Results: Mild to moderate periapical tissue reaction was found in Chitra-CPC samples belonging to the 1-month time period, whereas majority of the 3-month CPC samples showed an absence of inflammation. Samples of AH Plus in 1-month period showed severe to moderate inflammation, whereas 3-month AH Plus samples had a mild to moderate inflammation. Conclusions: Chitra-CPC is a biocompatible material.

Mutation Screening of Modifying Genes (Atox1 and Commd1) in Association with Wilson Disease.

Wilson disease (WD) results from accumulation of copper and is caused due to mutations in ATP7B, a copper transporting ATPase. Although WD is an established monogenic disorder, heterogeneity in phenotype is observed even among patients harboring mutations in ATP7B that would affect the mutant protein similarly. Such observations led to the speculation that there might be modifying loci that modulate the phenotype resulting from the aberration in the ATP7B gene. The expected genes coding for proteins that interact either directly with ATP7B or influence it indirectly might fit the role of modifier locus. ATOX1 and COMMD1 are the candidate genes that might play the role of a modifier locus having copper homeostasis pathway with such potential. To understand the role of modifying genes, we screened ATOX1 and COMMD1, a gene implicated in canine copper toxicosis, in 45 WD patients along with 50 healthy controls. This study did not yield satisfactory results concluding more patients to be analyzed. Keywords: Wilson Disease, ATOX1, COMMD1.

Modeling and Optimization of Cephalosporin C Production Using Streptomyces Gresiolus.

The objective of this study is to improve the cephalosporin C production through optimization of medium and culture conditions .The effect of agitation speed on CPC production in 3 l bioreactor was investigated with fed batch mode. The maximum CPC (0.79 g/l) , the biomass ( 35.4g was obtained at 400 rpm A statistical method was introduced to optimized the main culture medium constituents. Some medium constituents involving glucose, ammonium sulphate as inorganic nitrogen source and methionine were found to be the most effective factors for (CPC) production. The results showed the priority of fed batch culture than the batch one, since it increase the yield of the CPC by about 155 %.

El nacimiento de la patología y su desarrollo en la región / The birth of the pathology and its development in the region

Se presenta una rápida visión del surgimiento de los conceptos relacionados con la patología desde los tiempos de los griegos y los romanos hasta llegar al nacimiento de la disciplina con los aportes de Xavier Bichat. En relación al nacimiento de la disciplina en Colombia se narran sus inicios y las contribuciones del Doctor Alfredo Correa Henao.

It is presente and overview of the emergence of concepts related to the pathology since the time of the Greeks and Romans up to the birth of the discipline with the contributions from Xavier Bichat. In relation to the birth of the discipline in Colombia is described their development and the contributions of Dr. Alfredo Correa Henao.

Response of Odontoblast to the Bio-Calcium Phosphate Cement

Compatibility of Self-setting DBM-CP Composites in Percutaneous Kyphoplasty

PURPOSE: To analyze the physical properties of demineralized bone matrix (DBM) and self-setting calcium phosphate cement (CPC) composite for its compatibility to percutaneous kyphoplasty. MATERIALS AND METHODS: According to tap volume method, DBM was mixed with CPC in variable ratio 0%, 20%, 30%, 40% and 50%. Distilled water was used as a hardening fluid. Its properties, including injectability, mold applicability, setting time and its behavior, maximum temperature, and mechanical strength, were analyzed. RESULTS: The DBM-CP composites has a good injectability and mold applicability, a maximum temperature of less than 5oC, a initial setting time of 3 to 10 minutes. The outer surface of DBM-CP composites showed their even distribution in optical microscopy. Injectability, mold applicability and compressive strength were in inverse proportion to the amounts of DBM. CONCLUSION: This study suggests that the DBM-CP composites has a good injectability and mold applicability with a low setting temperature and even distribution of compound. Therefore this composite might be used as a substitute of PMMA in kyphoplasty.

On Ideological Education of Undergraduates Commanded by the Construction of the CPC / 中华医学教育探索杂志

The present paper makes a tentative study on the significance and the approaches of the undergraduates' ideological education in the present new situation,stressing that currently universities and colleges must strengthen the construction of the CPC organizations at universities and boost the construction of the education of talented people in an all-round way with the thought of "3 represents" as guidelines,the strengthening of the construction of the CYLC as foundation and the conducting of the ideological education of the construction of the CPC as means.

An experimental study on osseo-induction and biodegradation performances of three types of injectable and degradable calcium phosphate cement / 中华创伤骨科杂志

Objective To compare the osseo-induction and biodegradation performances of three types of injectable and degradable calcium phosphate cement (CPC) so as to find out a better bone substitute. Methods Three types of injectable and degradable CPC were respectively implanted into the bilateral tibias of 24 New Zealand rabbits: pure CPC (Group A), CPC added with Zinc and Strontiumions (Group B), and CPC with composite rhBMP-2 (Group C) . Their systematic and local reactions in implanted region were closely observed. The degra- dation and osseo-induction performances were compared macroscopically, microscopically and by CT scan to find out the one that could best meet clinical needs. Tissue slices were sampled and photographed four, eight and 16 weeks after operation. Five photographs were selected in each group and at each time points for computer software (Image Pro Plus 5.1) processing to calculate the percentages of bone in the images of postoperative slices. Results In Groups A and B, new bone was found to form slowly and little by little, and the ossification was not synchronous with the material degradation. In Group C, however, new bone was observed to form early and massively, and the os- sification was almost synchronous with the material degradation. In Groups A, B and C, the percentage of bone in the images of postoperative slices was (41.7?16.6)%, (31. 2?12.2)% and (71.7?21.0)% respectively. The bone percentage in CPC with composite rhBMP-2 was significantly higher than that in the other two types of CPC (P＜0.01 ). Conclusion The injectable and degradable CPC with composite rhBMP-2 is more suitable for clinical use, because it can induce early new bone formation and synchronous biodegradation.

Effects of Cervi Parvum Cornu on Cell Cycle Regulation in Human Fetal Osteoblasts / 대한치주과학회지

Recently, many natural medicines, whose advantages are less side effects and possibility of long-term use, have been studied for their capacity, their anti-bacterial and anti-inflammatory effects and regenerative potential of periodontal tissues. Cervi Parvum Cornu(CPC) have been traditionally used as an hale, growth, hematogenous, anti-aging, back pain in Eastern medicine. The purpose of present study was to investigate the effects of CPC extract on cell cycle progression and its molecular mechanism in human fetal osteoblasts. CPC extracts (10 microgram/ml) increased cell proliferation in the human fetal osteoblasts as compared to non-supplemented control. There was no significant change in the G1 and S phase, but a increase in the G2/M phase in 10 microgram/ml and 100 microgram/ml of CPC extracts group as compared to non-supplemented control. The protein expression of cyclin E, cdk 2, cyclin D, cdk 4, and cdk 6 was higher than that of control group. The level of p21 was lower than that of control. But that of pRb and p16 was not distinguished from control. These results indicate that the increase of cell proliferation by CPC extracts may be due to the increased expression of cyclin E , cdk 2, cyclin D, cdk 4 and cdk 6, and the decreased expression of p21 in human fetal osteoblasts .

Percutaneous vertebroplasty for treatment of osteoporotic thoracolumbar vertebral compression fracture by filling auto-solidification calcium phosphate cement / 中华创伤骨科杂志

Objective To explore the clinical effect of the percutaneous vertebroplasty(PVP) and filling auto-solidification calcium phosphate cement(CPC) in treatment of osteoporotic thoracolumbar vertebral fractures. Methods From January, 2004, 26 patients with osteoporotic thoracolumbar vertebral compression fracture (29 vertebral bodies) were treated with intraoperative manipulative reduction, PVP and filling auto-solidification CPC. Results PVP were successfully performed with unilateral or bilateral vertebral pedicles for the 29 vertebrae. The average injection dose of CPC was 4.6 mL. CPC leakage occurred during the procedure in 5 vertebrae of 5 cases. All the patients were followed up for 3 to 8 months (averaging 4.6 months) and experienced complete pain relief. There was no severe complication related to the treatment. Except in 3 patients who lost 15%of the vertebral body height, the anterior height of the injured vertebral body in the other 23 patients recovered averagely to 80%of the normal one. Conclusion PVP with filling auto-solidification CPC is safe and effective in the treatment of osteoporotic thoracolumbar vertebral compression fractures.

Computer-assisted Fluoroscopic Navigation Guiding the Treatment of Thoracolumbar Burst Fractures with CPC Vertebroplasty and Short-segment Vertebral Pedicle Screw Fixation / 中国医师杂志

Objective To explore the efficacy of computer-assisted fluoroscopic navigation to guide the treatment of thoracolumbar burst fractures. Methods 18 patients with thoracolumbar unstable fractures were treated with short-segment vertebral pedicle screw fixation guided by computer-assisted fluoroscopic navigation, and fractures were reinforced with CPC cement vertebroplasty. Postimplantatively, the implants' images-error between virtual image of fluoroscopy and X-ray image was measured. Results The implant's location was excellent. All patients were allowed sitting-up or bearing body weight one week after operation. The vertebral height restored 40% postoperatively. 12 months after operation the vertebral height only changed 0.15%. Dynamic X-ray films showed no abnormal segment instability and no instrument breaking. Conclusion Using computer-assisted fluoroscopic navigation to guide the treatment of thoracolumbar burst fractures with CPC vertebroplasty and short-segment pedicle srew fixation could determine the internal fixation approach and let implants to the precise position by one time of X-ray image. It increases the security of pedicle screw fixation and vertebroplasty.

Exploration of the Significance of Olympic Volunteer Spirit on CPC Construction in Higher Educational Institutions——Let College Students Find and Realize their Own Value through Activity Participation / 中国医学伦理学

Olympic volunteer spirit is a valuable spiritual treasure of Beijing Olympics.It is of great significance for enhancing the devotion consciousness of current college students and stimulating their innovative competence to take full advantage of the social educating function of Olympic volunteer spirit.Meanwhile,the Olympic volunteer spirit is also a major carrier of CPC construction and the cultivation of Party members among college students.