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Digital guided therapy (DGT) has been advocated as a contemporary computer-aided technique for treating endodontic diseases in recent decades. The concept of DGT for endodontic diseases is categorized into static guided endodontics (SGE), necessitating a meticulously designed template, and dynamic guided endodontics (DGE), which utilizes an optical triangulation tracking system. Based on cone-beam computed tomography (CBCT) images superimposed with or without oral scan (OS) data, a virtual template is crafted through software and subsequently translated into a 3-dimensional (3D) printing for SGE, while the system guides the drilling path with a real-time navigation in DGE. DGT was reported to resolve a series of challenging endodontic cases, including teeth with pulp obliteration, teeth with anatomical abnormalities, teeth requiring retreatment, posterior teeth needing endodontic microsurgery, and tooth autotransplantation. Case reports and basic researches all demonstrate that DGT stand as a precise, time-saving, and minimally invasive approach in contrast to conventional freehand method. This expert consensus mainly introduces the case selection, general workflow, evaluation, and impact factor of DGT, which could provide an alternative working strategy in endodontic treatment.
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Humans , Consensus , Endodontics/methods , Tooth , Printing, Three-Dimensional , Dental Care , Cone-Beam Computed Tomography , Root Canal TherapyABSTRACT
The dental operative microscope has been widely employed in the field of dentistry, particularly in endodontics and operative dentistry, resulting in significant advancements in the effectiveness of root canal therapy, endodontic surgery, and dental restoration. However, the improper use of this microscope continues to be common in clinical settings, primarily due to operators' insufficient understanding and proficiency in both the features and established operating procedures of this equipment. In October 2019, Professor Jingping Liang, Vice Chairman of the Society of Cariology and Endodontology, Chinese Stomatological Association, organized a consensus meeting with Chinese experts in endodontics and operative dentistry. The objective of this meeting was to establish a standard operation procedure for the dental operative microscope. Subsequently, a consensus was reached and officially issued. Over the span of about four years, the content of this consensus has been further developed and improved through practical experience.
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Humans , Dentistry, Operative , Consensus , Endodontics , Root Canal Therapy , Dental CareABSTRACT
Objective:To evaluate the effect of lifestyle interventions on cardiovascular risk factors in overweight/obese individuals.Methods:A total of 148 overweight/obese subjects who had annual physical exam in the Health Management Center, the First Affiliated Hospital Zhejiang University School of Medicine from Dec 2017 to Dec 2020 were included. They were divided into the self-management group ( n=74) and the intervention group ( n=74). The intervention group was given a 6-month lifestyle intervention, while the self-management group received regular nutrition and physical activity education. Anthropometric and laboratory data was collected at baseline and after intervention in both groups. Effect of the intervention was evaluated. Results:The age of subjects in the intervention and self-management group was (42.5±7.5) and (40.1±9.6) years, respectively. After the intervention, weight, body mass index, waist/hip ratio, visceral fat area, systolic blood pressure, diastolic blood pressure, uric acid, homocystein, triglyceride, alanine aminotransferase andγ-glutamyl transferase of the intervention group [(75.6±12.7) kg, (26.72±3.04) kg/m 2, 0.92±0.05, (104.4±28.5) cm 2, (124.2±13.7) mmHg (1 mmHg=0.133 kPa), (77.8±10.1) mmHg, (353.6±84.8) μmol/L, 9.11(7.73, 10.00) μmol/L, 1.23(0.83, 1.91) mmol/L, 19.5(13.0, 29.5) U/L, 19.0(13.0, 30.5) U/L, respectively] were significantly lower than that of the baseline data [(81.1±12.5) kg, (28.64±2.82) kg/m 2, 0.95±0.04, (127.2±26.6) cm 2, (132.4±14.7) mmHg, (83.2±10.2) mmHg, (387.2±91.2) μmol/L, 10.25(8.30, 11.70) μmol/L, 1.78(1.40, 2.37) mmol/L, 28.0(18.0, 58.0) U/L, 36.0(23.0, 54.3) U/L, respectively] (all P<0.05); compared with the self-management group [(80.1±9.2) kg, 31.7% (28.5%, 38.4%), (119.5±32.6) cm 2, (133.5±15.9) mmHg, (82.6±12.2) mmHg, (4.93±0.86) mmol/L, 1.78(1.26, 2.97) mmol/L, respectively], the intervention group had decreased weight, body fat percent, visceral fat area, systolic blood pressure, diastolic blood pressure, total cholesterol, triglyceride [(75.6±12.7) kg, 30.0%(26.3%, 34.3%), (104.4±28.5) cm 2, (124.2±13.7) mmHg, (77.8±10.1) mmHg, (4.53±0.83) mmol/L, 1.23(0.83, 1.91) mmol/L, respectively], and increased high-density lipoprotein cholesterol [(1.09±0.24) vs (1.18±0.28) mmol/L] (all P<0.05). Conclusion:An intensive lifestyle intervention has a beneficial effect on cardiovascular risk factors in overweight/obese individuals.
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Objective:To construct a esophageal cancer module with Chinese characteristics based on MD Anderson Symptom Inventory (MDASI) public scale, develop the Perioperative Esophageal Cancer Symptoms Assessment Scale combining above two parts.Methods:The original item pool was formulated through literature review, clinical interviews, and reference of existing symptoms assessment tools. After two rounds of expert evaluation and pilot survey, the preliminary Perioperative Esophageal Cancer Symptoms Assessmment Scale was developed combining Chinese MDASI (MDASI-C). A total of 150 perioperative esophageal cancer patients was assessed using the new scale, the included items were analyzed one by one, the reliability, validity and sensitivity of scale were checked.Results:Feasibility: the scale recovery was 100%, the completion rate of scale was 93.75%, the average completion time was 10 min. Reliability: the value of Cronbach α of the esophageal cancer module, MDASI-C, the combined scale were 0.747, 0.894, 0.883, respectively. Validity: the range of content validity index of items was 0.83-1.00, the scale-level content validity index average value was 0.93. Two common factors, which explained for 67.994% of variance, were extracted by exploratory factor analysis, the validity of criterion had statistical significance ( P<0.05). Sensitivity: the scores of the esophageal cancer module were significantly different among perioperative esophageal cancer patients with different Eastern Cooperative Oncology Group performance status ( H value was 9.264, P<0.05). Conclusions:The Perioperative Esophageal Cancer Symptoms Assessment Scale has good feasibility, reliability, validity and sensitivity, it is suitable for symptoms assessment of Chinese perioperative esophageal cancer patients.
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Objective:To explore whether botulinum toxin A (BTX-A) can improve the retention rate of fat transplantation in fat breast augmentation.Methods:Each patient was divided into control side and experimental side according to the random number table in 14 patients studied. The experimental group received autologous fat and BTX-A combined transplantation on both sides of the breast, while the control side only received autologous fat transplantation. The fat was added with the same volume of normal saline as BTX-A in the control group. All patients were followed up and the effects of BTX-A were evaluated objectively via the comparison of the remained bilateral fat graft volumes that were obtained through a digital three-dimensional reconstructions technique. Moreover, the improvement of each breast appearance and complication were assessed by the physician and patients who were blinded to the recipient treatment assignment.Results:The outcome of the fat breast augmentation was evident for both groups at the follow-up with no evidence of fat embolism, vascular/nervous injury, infection and prolonged bruising. In one of the 14 patients (control group), fat liquefaction necrosis occurred in one side of the breast; after active treatment, it returned to normal, and three patients had different degrees of mass. The analysis on the three-dimensional reconstruction data and the assessments from both the physicians and patients showed significant differences in the fat graft retention volume between the BTX-A group (51.10±20.56)% and the control group (33.06±14.77)%. Nevertheless, there was no significant difference in the incidence of complications between the two sides.Conclusions:Autogenous fat breast augmentation is safe and effective. This study result has shown that BTX-A can significantly improve the retention rate of fat transplantation but cannot reduce the incidence of complications.
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OBJECTIVE@#To investigate enterovirus 71 (EV71)-induced of autophagy, apoptosis and the related signaling pathways in THP-1 macrophages.@*METHODS@#THP-1 macrophages were infected with EV71 at the multiplicity of infection (MOI) of 0.1 for 2, 8 or 16 h, and the cell proliferation and toxicity were analyzed using CCK-8 kit. The intracellular viral nucleic acid in THP-1 macrophages were detected by fluorescence quantitative PCR, and the ultrastructural changes of the cells were observed using transmission electron microscopy. Cell apoptosis induced by EV71 infection was detected using Hoechst 33342 staining and AnnexinV/PI double staining. Western blotting was performed for analysis of changes in autophagy and apoptosis of the cells and in the expressions of the related proteins. The effect of EV71 infection on apoptosis of THP-1 macrophages incubated with 3-MA and Ac-DEVD-CHO inhibitor for 2 h was assessed using Western blotting.@*RESULTS@#EV71 infection significantly lowered the cell survival rate of THP-1 macrophages at 2, 8 h and 16 h after the infection ( < 0.05). The total copy number of viral nucleic acid in THP-1 macrophages incubated with EV71 increased significantly and progressively over time ( < 0.01). Intracellular autophagosomes and virions could be seen in EV71-infected THP-1 macrophages. The total apoptotic rate of the infected cell also increased significantly over time ( < 0.01). EV71 infection significantly increased LC3 conversion (LC3-Ⅱ/ LC3-I) and the expression of cleaved caspase 3 protein and decreased the protein expressions of p62, Bcl-2 and caspase-3 ( < 0.01) without causing obvious changes in cleaved caspase-8 (>0.05). 3-MA significantly inhibited the EV71-induced autophagy of THP-1 macrophages and reduced LC3 conversion (LC3-Ⅱ/LC3-I) and p62 protein expression at 8 h after EV71 infection ( < 0.01). Compared with DMSO, Ac-DEVD-CHO significantly inhibited EV71-induced apoptosis of THP-1 macrophages (15.5% 7.7%, < 0.01).@*CONCLUSIONS@#EV71 not only can infect and replicate in THP-1 macrophages, but also induces autophagy and cell apoptosis possibly by activating LC3/p62 autophagy pathway and caspase apoptosis pathway.
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Humans , Apoptosis , Autophagy , Cell Line , Enterovirus A, Human , MacrophagesABSTRACT
Objective To evaluate the clinical effect of nanofat on superficial rhytides of face and neck and dark lower eyelids.Methods From September 2014 to January 2017,a total of 86 cases were collected in our hospital for voluntary nanofat transplantation on superficial rhytides and dark lower eyelids.This was a retrospective study,which included 18 cases of eye wrinkles,14 cases of forehead wrinkles,neck wrinkles in 14 cases,and 22 cases of dark lower eyelids.First of all,we harvested mircofat through liposuction,and then transformed mircofat to nanofat.At last,nanofat was grafted into intradermal layer of the skin with sharp needles.We took the standard photographs of the patients.After six months follow-up,doctors and patients evaluated the short term and long-term postoperative effect.Results No serious complications occurred in all patients.Postoperative evaluation of facial and neck superficial wrinkles showed that the satisfactory rate of doctors and patients after one month,was 85.9％and 84.3％,and after 6 months 87.5％ and 84.3％,respectively.Postoperative evaluation of dark lower eyelids showed that the satisfactory rate of doctors and patients after one month was 45.5％ and 36.4％,and after 6 months 81.8％ and 86.4％,respectively.Conclusions Nanofat can rectify the superficial rhytides of face and neck and dark lower eyelids in some patients.However,for some patients the effect is not satisfied.
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Objective@#To evaluate the effects of lipopolysaccharides (LPS) extracted from Porphyromonas endodontalis (Pe) on the expression of matrix metalloproteinase-9 (MMP-9) mRNA and protein as well as enzyme activity in MC3T3-E1 cells and the role of nuclear factor-κB (NF-κB) in the process, so as to investigate the expression of MMP-9 dependent signaling pathways in mouse osteoblasts induced by Pe LPS.@*Methods@#The experiment was conducted in 3 sessions: MC3T3-E1 cells were treated with various concentrations of Pe LPS (0-20 mg/L) and 10 mg/L Pe LPS for different time intervals (0-48 h). The expression of MMP-9 mRNA and protein were detected by real-time reverse transcription-PCR (RT-PCR) and enzyme-linked immunosorbent assay (ELISA), while the enzyme activity was detected by gelatin zymography method. The expression of MMP-9 mRNA was also detected in 10 mg/L Pe LPS treated MC3T3-El cells after pretreated with specific NF-κB inhibitor BAY 11-7082 for l h. Statistical analysis was performed using one-way ANOVA and Dunnett t test with SPSS 13.0 software package.@*Results@#The levels of MMP-9 mRNA and protein increased significantly after the treatment with various concentrations of Pe LPS (0-20 mg/L), which indicated that Pe LPS induced osteoblasts to express MMP-9 in dose dependent manners. The expression of MMP-9 protein increased from (5 395±362) ng/L (blank control group) to (12 684±375) ng/L (20 mg/L group). Maximal induction of MMP-9 mRNA expression was found in the MC3T3-E1 cells treated with 10 mg/L Pe LPS for 24 h. The expression of MMP-9 mRNA in the 20 mg/L group was about 7 times than that in the blank control group. After 24 h, the expression of MMP-9 mRNA decreased. Maximal expression of MMP-9 protein was found in the MC3T3-E1 cells treated with 10 mg/L Pe LPS for 48 h ([35 055±2 346] ng/L) showing the highest enzyme activity. The mRNA of MMP-9 decreased significantly after pretreatment with 10 µmol/L BAY 11-7082 for 1 h.@*Conclusions@#Pe LPS might induce the expression of MMP-9 in MC3T3-E1 cells through the signaling of NF-κB.
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Objective:To investigate the effects of Porhyromonas endodontalis(P.e)liopolysaccharide(LPS)on the expression of IL-23mRNA and protein in mouse osteoblasts MC3T3-E1 and the role of phosphatidylinositol 3-Kinases (PI3K)signaling pathway in this process.Methods:MC3T3-E1 cells were treated with different concentrations of P.e LPS for different hours,or pretreated with LY294002,a special PI3K inhibitor.The IL-23 mRNA and protein expression levels were detected by real-time PCR and Western blot respectively.Results:The level of IL-23 mRNA increased in MC3T3-E1 cells with the increase of concentration and the treatment time of P.e LPS(P <0.05).The IL-23 protein expression was increased by P.e LPS in a time dependent manner(P <0.05).The mRNA and protein of IL-23 decreased(P <0.05)after pretreatment with LY294002.Conclusion:P.e LPS can induce the expression of IL-23 mRNA and protein in MC3T3-E1 cells,and the PI3K signaling pathway may play a part in this process.
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DHA (22:6n-3) is a Ω-3 polyunsaturated fatty acid with 22 carbon atoms and 6 double bonds, which has important biological functions in human body. Human and other mammals synthesize only limited amounts of DHA, more requirements must be satisfied from food resources. However, the natural resources of DHA (Mainly deep-sea fish and other marine products) are prone to depletion. New resources development is still insufficient to satisfy the growing market demand. Previous studies have revealed that the mammals can increase the synthesis of DHA and other long-chain polyunsaturated fatty acids after transgenic procedures. In this study, mammalian cells were transfected with Δ6, Δ5 desaturase, Δ6, Δ5 elongase, Δ15 desaturase (Isolated from nematode Caenorhabditis elegans) and Δ4 desaturase (Isolated from Euglena gracilis), simultaneously. Results show that the expression or overexpression of these 6 enzymes is capable of conversion of the o-6 linoleic acid (LA, 18:2n-6) in DHA (22:6n-3). DHA content has increased from 16.74% in the control group to 25.3% in the experimental group. The strategy and related technology in our research provided important data for future production the valuable DHA (22:6n-3) by using genetically modified animals.
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Animals , Caenorhabditis elegans , Cells, Cultured , Docosahexaenoic Acids , Chemistry , Euglena gracilis , Fatty Acid Desaturases , Linoleic Acid , Chemistry , Mammals , TransfectionABSTRACT
Objective To construct a prokaryotic expression vector pET-22b+with Middle East respiratory syndrome ( MERS) coronavirus nuclocapsid protein( NP) gene and to express and purify N protein.Methods N gene amplified by PCR was inserted into the prokaryotic expression vector pET-22b+.Recombinant plasmid was confirmed using DNA elec-trophoresis and sequencing.NP was expressed in E.coli BL21(DE3) by IPTG induced and purified by cation exchange chromatography using the AKTA purification system.Results The NP gene sequence was proved to be correct by sequen-cing and the protein was expressed in both soluble and insoluble forms in E.coli BL21 ( DE3 ) after IPTG induction.The purity and concentration of recombinant protein was improved obviously by cation exchange chromatography and enrich-ment.Conclusion Recombiant NP of high purity and concentration is purified and will facilitate NP functional research.
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Aim To investigate the effects of isoliquiri-tigenin(ISL)on C6 glioma cell proliferation and differ-entiation.Methods C6 glioma cells’viability and proliferation were respectively measured by SRB test. Colony formation of C6 glioma cells from different groups was assayed.After culturing the cells from each group,giemsa staining was used to observe cell mor-phology.RT-PCR was applied to detect mRNA expres-sion of GFAP.Western blot was applied to detect the expression of GFAP.Results ISL effectively inhibited the viability of C6 glioma cells when compared with the control group in a concentration-dependent manner (P<0.01).The morphological observation under light mi-croscope showed that:in the control group,most of the undifferentiated C6 cells showed long fusiform and po-lygonal shape.Compared to the control group,the C6 cells treated with ISL revealed alteration in morphology such as astrocytes with smaller smooth,round body and much finer longer,tapering processes.The cloning for-mation rate detection revealed that:the colonies in the control group semerged earlier and were larger than those experimental ones,the cloning formation rate was higher,while almost no effective cells colony emerged in ISL treated groups(P <0.01 ).Western blot and RT-PCR analysis showed that GFAP expression in the ex-perimental groups increased(P <0.01).Conclusion ISL may inhibit the proliferation of C6 glioma cells and induce their differentiation.
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Objective To detect the impact of reactive oxygen species ( ROS) on mitochondrial morphology and distri-bution during mitosis.Methods A viral vector in which the fluorescence gene was specifically under the control of mito-chondrial promoter was constructed and confirmed through DNA sequencing and Western blotting.After transfecting HeLa s3 cell with packaged virus, the HeLa s3-COX4tp-EGFP cell line stably expressing the mitochondrial fluorescence signal was obtained.With immunofluorescent staining, the impact of ROS on the morphology and distribution of mitochondria dur-ing mitosis was inspected.Result The cell line constantly expressing mitochondrial fluorescence signals was successfully constructed.Meanwhile,it was found that H2 O2 treatment could significantly change the morphology and distribution of mi-tochondria during mitosis by confocal microscopy.Conclusion Our study demonstrates that ROS can affect the morphology and distribution of mitochondria during mitosis.This research help study the relationship between the mitochondrial function and the regulation of mitosis in the future.
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<p><b>OBJECTIVE</b>To investigate the effects of lipopolysaccharides (LPS) extracted from Porphyromonas endodontalis (Pe) on the expression of macrophage colony stimulating factor (M-CSF) mRNA and protein in MC3T3-E1 cells and the role of nucler factor-κB (NF-κB) in the process.</p><p><b>METHODS</b>MC3T3-E1 cells were treated with different concentrations of Pe-LPS (0-50 mg/L) and 10 mg/L Pe-LPS for different hours (0-24 h). The expression of M-CSF mRNA and protein was detected by reverse transcription polymerase chain reaction (RT-PCR) and enzyme-linked immunoadsordent assay (ELISA). The cells untreated by Pe-LPS served as control. The expression of M- CSF mRNA and protein was also detected in 10 mg/L Pe- LPS treated MC3T3-E1 cells after pretreated with BAY 11-7082 for 1 h, a special NF-κB inhibitor. The groups were divided as follows, control group, BAY group (10 µmol/L BAY 11-7082 treated alone MC3T3-E1 cells), Pe-LPS group (10 mg/L Pe-LPS stimulated MC3T3-E1 cells for 6 h), BAY combine with Pe-LPS group (10 µmol/L BAY 11-7082 pretreated cells for 1 h and 10 mg/L of Pe-LPS stimulated MC3T3-E1 cells for 6 h).</p><p><b>RESULTS</b>The level of M- CSF mRNA and protein increased significantly after treatment with different concentrations of Pe-LPS (0-50 mg/L), which indicated that Pe-LPS induced osteoblasts to express M-CSF mRNA and protein in dose dependent manners. The expression of M-CSF protein increased from (35 ± 2) ng/L (control group) to (170 ± 8) ng/L (50 mg/L group). Maximal induction of M-CSF mRNA expression was found in the MC3T3- E1 cells treated with 10 mg/L Pe-LPS for 6 h. After 6 h, the expression of M-CSF mRNA decreased gradually. The expression of M-CSF protein also increased with the treatment of 10 mg/L Pe-LPS for 10 h [(122 ± 4) ng/L]. After 10 h, the expression of M-CSF protein decreased gradually. The mRNA and proteins of M-CSF decreased significantly after pretreatment with 10 µmol/L BAY 11-7082 for 1 h. There was no significant difference between BAY group and the control.</p><p><b>CONCLUSIONS</b>Pe-LPS may induce the expression of M-CSF mRNA and protein in MC3T3-E1 cells through the signaling of NF-κB.</p>
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Animals , Mice , Lipopolysaccharides , Pharmacology , Macrophage Colony-Stimulating Factor , Physiology , NF-kappa B , Metabolism , Nitriles , Osteoblasts , Metabolism , Porphyromonas endodontalis , RNA, Messenger , Signal Transduction , SulfonesABSTRACT
0.05). But there was more BMP in the treated group of periodontitis than the other groups(P
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Objective:To observe the proliferation and the free intracellular calcium ion concentration of osteoblast under the effect of static magnetic field and discuss the possible mechanism of the static magnetic field on promoted the proliferative function. Methods: The MTT assay was used to measure the rate of the proliferation on different magnetic field intensity(0, 0.026, 0.044, 0.090 T)and action time(24, 48, 72 h).The fluorescence double wavelength spectrophotometer was used to measure the concentration of intracellular calcium ion. The data obtained were analyzed for ANOVA and t-test using SPSS 11.0 software package. Results: Osteoblasts in group 0.044 T appeared significant proliferation within 48 h(P
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Objective:To Study the effect of static magnetic field on the proliferation and differentiation of osteoblasts.Methods:In vitro cultured rat calvarial osteoblasts were seeded into 96-well culture plate and exposed to the different magnetic intensity field for 24,48 and 72 h respectively.MTT assay was applied to study the cell proliferation. ALP was measured by a microplate reader.Results:When the magnetic exposure time extended to 48 h or 72 h, the corresponding MTT value of osteoblasts with magnetic treatment of 40 mT or 62 mT increased obviously(P0.05). ALP activity increased after 24 h exposure to static magnetic field, the effect of static magnetic field intensity of 62 mT and 83 mT showed the strongest promotion effect(P
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0.05) in GCF. Conclusion:, The change PGE 2 and ALP in GCF of periodontitis tooth was similar to that of normal tooth during orthodontic therapy.